TECHNICAL SPECIFICATION FOR H.V.A.C WORKS · R) STANDARD SPECIFICATION OF FIRE DAMPERS: ... HVAC...

DR. RAM MANOHAR LOHIA STATE ACADEMY FOR

ADMINISTRATION AND MANAGEMENT, LUCKNOW, UP.

TECHNICAL SPECIFICATION FOR H.V.A.C WORKS

RMLA AT LUCKNOW

LIST OF CONTENTS I) AIR CONDITIONING WORKS: .............................................................................................................. 1

A) SCOPE OF WORK AND REQUIREMENTS FOR HVAC SYSTEM: ........................................................... 1

B) DESIGN PARAMETERS: ..................................................................................................................... 12

C) STANDARD SPECIFICATION: ............................................................................................................. 14

D) NOISE AND VIBRATION CONTROLS: ................................................................................................ 18

E) STANDARD SPECIFICATION OF ROTARY SCREW CHILLERS: ............................................................ 19

F) STANDARD SPECIFICATION OF PUMP SETS: .................................................................................... 29

G) STANDARD SPECIFICATION OF VARIABLE SPEED PUMPING SYSTEM: ........................................... 32

H) STANDARD SPECIFICATION OF INDUCED DRAFT COOLING TOWERS: ............................................ 38

I) STANDARD SPECIFICATION OF ELECTRIC HOT WATER GENERATOR: ............................................. 41

J) STANDARD SPECIFICATION OF DOUBLE SKINNED AIR HANDLING UNITS: ..................................... 43

K) STANDARD SPECIFICATION OF FAN COIL UNITS: ............................................................................ 48

L) STANDARD SPECIFICATION OF PRECISION AC UNITS: .................................................................... 51

M) STANDARD SPECIFICATION OF DX SPLIT SYSTEM: .......................................................................... 57

N) STANDARD SPECIFICATION OF PIPING WORK: ............................................................................... 60

O) STANDARD SPECIFICATION OF CONTROLS AND INSTRUMENTS: ................................................... 71

P) STANDARD SPECIFICATION OF EXPANSION TANKS & AIR SEPARATORS: ...................................... 73

Q) STANDARD SPECIFICATION OF AIR CIRCULATION SYSTEM: ........................................................... 74

R) STANDARD SPECIFICATION OF FIRE DAMPERS: .............................................................................. 83

S) STANDARD SPECIFICATION OF INSULATION: .................................................................................. 84

T) STANDARD SPECIFICATION OF FANS: .............................................................................................. 88

U) STANDARD SPECIFICATION OF AIR WASHER: ................................................................................. 93

V) STANDARD SPECIFICATION OF SCRUBBER: ..................................................................................... 95

W) PAINTING WORK: ............................................................................................................................ 96

X) MODE OF MEASUREMENT: .............................................................................................................. 97

Y) INCLUDED ITEMS OF WORK: ........................................................................................................... 99

Z) TESTING OF AIR-CONDITIONING SYSTEM: .................................................................................... 101

AA) SCHEDULE OF TECHNICAL DATA .................................................................................................... 106

II) STANDARD SPECIFICATION OF BUILDING MANAGEMENT SYSTEM (BMS): ................................. 117

III) ELECTRICAL SYSTEM: ...................................................................................................................... 169

RAM MANOHAR LOHIA ACADEMY AT LUCKNOW HVAC-TS-1

HVAC Works: Technical Specifications Envirotech Design Pvt. Ltd.

AB) LIST OF APPROVED MAKES ............................................................................................................ 181

TECHNICAL SPECIFICATIONS I) AIR CONDITIONING WORKS: A) SCOPE OF WORK AND REQUIREMENTS FOR HVAC SYSTEM: 1.0 SCOPE OF WORK

The general scope of work to be carried out under this HVAC subhead is illustrated in Drawings, Specifications and Schedule of Quantities. The Contractor shall carry out and complete the said work under this contract in every respect in conformity with the contract documents and with the direction of and to the satisfaction of the Engineer-in-charge. The contractor shall furnish all labour, materials and equipment as listed under Schedule of Quantities (SOQ) and specified otherwise, transportation and incidental necessary for supply, installation, testing and commissioning of the complete air conditioning system as described in the SOQ, Specifications and as shown on the drawings. This also includes any material, equipment, appliances and incidental work not specifically mentioned herein or noted on the Drawings/Documents as being furnished or installed, but which are necessary and customary to be performed under this contract. The central Heating, Ventilation and Air-Conditioning (HVAC) system shall comprise of following:

a. Water Chilling Machines. b. Chilled & Condenser water Pumping system.

c. Cooling towers. d. Hot water generator. e. Water treatment system.

f. Air handling units (AHUs) & Treated Fresh Air (TFAs) units. g. Fan coil units (FCUs).

h. Precision AC units. i. Split Units.

j. Chilled water, condensing water and condensate drain piping inclusive of all valves and

fittings. k. Motorised valves & thermostats for AHUs & FCUs. l. Insulation of pipes, pumps and expansion tank. m. Expansion tank, Air separator & pot strainer.



n. Sheet metal ducts inclusive of external insulation, acoustic lining, canvas connections, volume control dampers and smoke dampers as required.

o. Supply and return air registers, diffusers etc. p. Vane axial, tube axial, propeller fans for mechanical ventilation systems. q. Air washer, Scrubber for kitchen ventilation.

r. Motor control centres. s. Vibration isolators for all HVAC equipment. t. Automatic controls and instruments.

u. Wiring and earthing from MCC panels to various air conditioning and mechanical ventilation equipment, control wiring and interlocking.

v. Cutting all openings/holes, chases in walls or slab for duct/pipe crossings, including

sealing, frame work, fire proofing, providing sleeves, cover plates, making good structure and finishes to an approved standard. No additional payment shall be made by Owners on this account.

w. Provide larger size sleeve for crossing of pipe, conduits & cables through fire rated

wall/partition. The sleeve shall be sealed with fiberglass and fire sealant.

x. Fire/smoke dampers shall be installed as per manufacturer recommendation or as per Engineer-in-charge instruction to maintain integrity of fire compartmentation. The Contractor shall submit installation details and obtain approval prior to execution at site.

y. Balancing, testing and commissioning of the entire HVAC and mechanical ventilation

installation.

z. Test reports, list of recommended spares, as-installed drawings, operation and maintenance manual for the entire HVAC installation.

aa. Training of owner’s Staff.

2.0 ASSOCIATED CIVIL WORKS

All associated Civil works listed below are excluded from the scope of this HVAC subhead but these works shall be executed by the contractor through specialized agency engaged by the contractor for executing civil works as per the requirements and in accordance with approved shop drawings of HVAC system.

i. RCC foundation for water chilling machines pumps & centrifugal fans with angle iron

frame work at the edges to protect these from damage.

ii. RCC supports for cooling towers.

iii. PCC foundation blocks with angle iron frame work edging for all motor control centre.



iv. PCC foundation for pot strainers.

v. PCC foundation blocks for all air handling units.

vi. Supply and fixing of G.I frame for mounting of grilles in masonry walls.

3.0 ASSOCIATED SERVICES WORKS 3.1 All associated Electrical works listed below are excluded from the scope of this HVAC subhead

but these works shall be executed by the contractor through specialized agency engaged by the contractor for executing Electrical(Internal EI) works as per the requirements and in accordance with approved shop drawings of HVAC system.

i. Providing power supply with earthing at the incoming of control panel in A/C plant

room.

ii. Providing power supply and earthing at the incoming MCCB in each air handling unit control panel.

iii. Providing power and earthing at the incoming MCCB in each fan panel and pump panel

at locations called for on HVAC shop drawings.

iv. Providing 15 amps power outlet within 2 meter reach of each fan coil unit at locations called for on HVAC shop drawings.

v. Providing 15 amps power outlet within 2 meter reach of each single phase propeller fan

at locations called for on HVAC shop drawings.

vi. Providing wiring and earthing for sump pumps in air conditioning plant room. Note: The specialized agency executing the HVAC works shall closely coordinate with agency

executing the Electrical works (Internal EI) for executing the above works. Agency executing the HVAC works shall conform in writing indicating desired electrical load and incoming cable size to the electrical contractor for his equipment. But the contractor is fully responsible for proper co-ordination and execution of the above works.

3.2 All associated PLUMBING WORKS listed below are excluded from the scope of this HVAC

subhead but these works shall be executed by the contractor through specialized agency engaged by the contractor for executing Plumbing works as per the requirements and in accordance with approved shop drawings of HVAC system. Items available in BOQ under Plumbing subhead shall be operated for executing these works.

i. Providing soft makeup water required for cooling tower, air washers chilled water / hot

water and expansion tank.

ii. Providing sump pumps and necessary piping for drainage of air conditioning plant room and other machine rooms.

iii. Providing floor drains in cooling tower area and in air handling unit rooms.



iv. Disposal of condensate drain from fan coil units beyond the condensate drain riser.

4.0 BUILDING AUTOMATION SYSTEM (BAS)

The scope of HVAC work shall include the following for the interface to Building Automation System.

i. Stop/Manual/ Auto switches along with potential free contacts for monitoring the

manual operation status, to be provided for those equipment whose start / stop is controlled by Building Automation System.

ii. Potential free ‘NO’ contacts for monitoring ‘Run’ status of equipment wherever

required.

iii. Necessary contactor with potential free contacts and Stop/Manual/ Auto switches to be provided for which requires starting / stopping through Building Automation System.

iv. Sockets /Nipples with shut-off valve for mounting sensors/transmitters on pipe lines.

v. Installation of all motorized control valves with provision of counter flanges shall be

provided by the contractor. Interface cards (0-10 V or 4-20 mA) if required shall be the scope of contractor for operation of valves & all the mixing valve shall be calibrated before connecting it to BAS.

vi. The space provision in all the equipment panel ( MCC) such as AHUs, Pumps, Chillers

etc. for mounting Current/ Potential transformers & transducers and power supply to the transducer shall be provided by the contractor. Separate current transformers shall be provided for monitoring current / KWH (wherever required) through BAS.

vii. The installation of current transformer & Transducer along with wiring between Current

Transformer & Transducer up to the terminal block shall be provided by the contractor.

viii. The low voltage BAS Cables shall be brought up to the electric panel by the agency

executing BAS works and all terminations into the electrical panels shall be made by HVAC executing agency after satisfying himself of the wiring system. It is to be clearly understood that the final responsibility for the sufficiency, adequacy and conformity to the contract requirements, of the HVAC system, lies solely with the contractor.

ix. Provision for mounting level switch on cooling tower sump & expansion tank shall be

provided by agency executing HVAC works.

x. 15 Amps. Power supply with MCB shall be provided on all AHU panels and 32 Amps MCB on HVAC plant room panel for power supply to DDC. Panel.

xi. All necessary Hardware/ Software shall be made available by the HVAC agency on the

chiller Microprocessor panel for the integration of chiller panel to Building Automation System for remote monitoring / controlling of all parameters of chiller thru BAS.

5.0 PERFORMANCE OF THE SYSTEM



The contractor shall carry out the work in accordance with the Drawings, Specifications, Schedule of Quantities and other documents forming part of the Contract. The contractor shall be fully responsible for the performance of the selected equipment at the specified parameters and for the efficiency of the installation to deliver the required end result.

Complete set of architectural drawings is available with the owner and reference may be made to same for any details or information. The contractor shall also guarantee that the performance of various equipment individually, shall not be less than the quoted capacity; also actual power consumption shall not exceed the quoted rating, during testing and commissioning, handing over and guarantee period.

The contractor shall verify the AC load computed by consultant. For this, the contractor shall obtain the latest design basis from the owner (i.e. lighting load, equipment load, latest architectural & interior plans and occupancy) to cross-check and calculate the capacity of various equipment.

The contractor shall test the entire HVAC installation in first SUMMER, WINTER AND MONSOON on following the completion of the installation to check and do everything necessary to ensure that the specified indoor conditions in all spaces are maintained, that all water and air systems are properly balanced, that all controls are calibrated accurately, and that all units are functioning satisfactorily. In case of failure to demonstrate the result of system in any season, the test shall be repeated in following year and the defects liability period shall be extended accordingly and the contractor has to extend / submit the performance guarantee accordingly.

6.0 BYE-LAWS AND REGULATIONS

The installation shall be in conformity with the Bye-laws, Regulations and Standards of the local authorities concerned, in so far as these become applicable to the installation. But if these Specifications and Drawings call for a higher standard of materials and / or workmanship than those required by any of the above regulations and standards, then these Specifications and Drawings shall take precedence over the said regulations and standards. However, if the Drawings and specifications require something which violates the Bye-laws and Regulations, then the Bye-laws and Regulations shall govern the requirement of this installation.

7.0 FEES AND PERMITS

The contractor shall obtain all permits/ licenses and pay for any and all fees required for the inspection, approval and commissioning of their installation.

8.0 DRAWINGS

The HVAC Drawings are diagrammatic only and indicate arrangement of various systems and the extent of work covered in the contract. These Drawings indicate the points of supply and of termination of services and broadly suggest the routes to be followed. Under no circumstances shall dimensions be scaled from these Drawings. The architectural/interiors drawings and details shall be examined for exact location of equipment, controls, grilles and diffusers.

The contractor shall follow the tender drawings in preparation of his shop drawings, and for subsequent installation work. The contractor shall check the drawings of other trades to verify



spaces in which his work will be installed. Any changes/modifications required at site due to lack of coordination with other agencies shall be carried out at contractor’s cost.

Maximum headroom and space conditions shall be maintained at all points. Where headroom appears inadequate, the contractor shall notify the owner’s representative before proceeding with the installation. In case installation is carried out without notifying, the work shall be rejected and contractor shall rectify the same at his own cost.

The contractor shall examine all architectural, structural, plumbing, electrical and other services drawings and check the as-built works before starting the work, report to the owner any discrepancies and obtain clarification. Any changes found essential to coordinate installation of his work with other services and trades, shall be made with prior approval of the owner representative without additional cost to the owner. The data given in the Drawings and Specifications is as it could be procured.

9.0 TECHNICAL DATA

The Contractor before placing purchase order for the equipments of HVAC system, shall submit the Technical data of all major equipments. The contractor must follow all the technical specifications mentioned in the tender.

10.0 SHOP DRAWINGS 10.1 All the shop drawings shall be prepared on computer through Autocad System based on

Architectural Drawings and site measurements. All heat load calculations shall be done using latest version of HAP/Trace 600 only. Within agreed time frame with Engineer-in-charge after award of the contract, contractor shall furnish, for the approval of the consultant, two sets of detailed shop drawings of all equipment and materials including layouts for Plant room, AHU rooms, cooling towers, fan coil units, ventilation fans; detailed ducting drawings showing exact location of supports, flanges, bends, tee connections, reducers, guide vanes, silencers, distribution grids, volume control dampers, collars, grilles, diffusers; detailed piping drawings showing exact location and type of supports, valves, fittings etc; acoustic lining and external insulation details for ducts, pipe insulation etc; electrical panels inside/outside views, power and control wiring schematics, cable trays, supports and terminations. These shop drawings shall contain all information required to complete the Project as per specifications and as required by the owner/architect/consultant. These Drawings shall contain details of construction, size, arrangement, operating clearances, performance characteristics and capacity of all items of equipment, also the details of all related items of work by other contractors. Each shop drawing shall contain tabulation of all measurable items of equipment/materials/works and progressive cumulative totals from other related drawings to arrive at a variation-in-quantity statement at the completion of all shop drawings. Minimum 06 sets of drawings shall be submitted after final approval along with CD.

Each item of equipment/material proposed shall be a standard catalogue product of an established manufacturer strictly from the manufacturers listed in Approved makes for enclosed in the tender.

When owner/architect/consultant makes any amendments in the above drawings, the contractor shall supply two fresh sets of drawings with the amendments duly incorporated along with check prints, for approval. The contractor shall submit further 06 sets of shop drawings to the client for the exclusive use by the owner and all other agencies. No material or



equipment may be delivered or installed at the job site until the contractor has in his possession, the approved shop drawing for the particular material/equipment/installation.

10.2 Shop drawings shall be submitted for approval four weeks in advance of planned delivery and

installation of any material to allow owner ample time for scrutiny. No claims for extension of time shall be entertained because of any delay in the work due to his failure to produce shop drawings at the right time, in accordance with the approved programme.

10.3 Manufacturers drawings, catalogues, pamphlets and other documents submitted for approval

shall be in four sets. Each item in each set shall be properly labeled, indicating the specific services for which material or equipment is to be used, giving reference to the governing section and clause number and clearly identifying in ink the items and the operating characteristics. Data of general nature shall not be accepted.

10.4 Samples of all materials like grilles, diffusers, controls, insulation, pre-moulded pipe section,

control wires etc shall be submitted to the owner prior to procurement. These will be submitted in two sets for approval and retention by owner and shall be kept in their site office for reference and verification till the completion of the Project. Wherever directed a mockup or sample installation shall be carried out for approval before proceeding for further installation.

10.5 Approval of shop drawings shall not be considered as a guarantee of measurements or of

building dimensions. Where drawings are approved, said approval does not mean that the drawings supercede the contract requirements, nor does it in any way relieve the contractor of the responsibility or requirement to furnish material and perform work as required by the contract. Contractor shall verify the feasibility at site prior to commencing ordering or fabrication based on approved shop drawings.

10.6 Where the contractor proposes to use an item of equipment, other than that specified or

detailed on the drawings, which requires any redesign of the structure, partitions, foundation, piping, wiring or any other part of the mechanical, electrical or architectural layouts; all such re-design, and all new drawings and detailing required therefore, shall be prepared by the contractor at his own expense and got approved by the owner. Any delay on such account shall be at the cost of and consequence of the Contractor.

Where the work of the contractor has to be installed in close proximity to, or will interfere with work of other agencies, he shall assist in working out space conditions to make a satisfactory adjustment. If so directed by the owner the contractor shall prepare composite working drawings and sections at a suitable scale, not less than 1:50, clearly showing how his work is to be installed in relation to the work of other agencies, If the Contractor installs his work before coordinating with other agencies, or so as to cause any interference with work of other agencies, he shall make all the necessary changes without extra cost to the owner.

10.7 The contractor during execution shall strictly follow the approved shop drawing. In case of any

change in route, size or any other item, contractor shall obtain written approval from owner/architect/consultant prior to execution at site.

10.8 Along with shop drawings, the contractors shall submit comprehensive variation in quantity

statement to owner for approval. 11.0 QUIET OPERATION AND VIBRATION ISOLATION



All equipment shall operate under all conditions of load without any sound or vibration which is objectionable in the opinion of the owner. In case of rotating machinery, sound or vibration noticeable outside the room in which it is installed, or annoyingly noticeable inside its own room, shall be considered objectionable. Such conditions shall be corrected by the Contractor at his own expense. The contractor shall guarantee that the equipment installed shall maintain the specified NC levels.

12.0 ACCESSIBILITY

The Contractor shall verify the sufficiency of the size of the shaft openings, clearances in cavity walls and suspended ceilings for proper installation of his ducting and piping. His failure to communicate insufficiency of any of the above shall constitute his acceptance of sufficiency of the same. The Contractor shall locate all equipment which must be serviced, operated or maintained in fully accessible positions. The exact location and size of all access panels, required for each concealed control damper, valve or other devices requiring attendance, shall be finalized and communicated in sufficient time, to be provided in the normal course of work. Failing this, the Contractor shall make all the necessary repairs and changes at his own expense. Access panel shall be standardized for each piece of equipment / device / accessory and shall be clearly nomenclatured / marked and coordinate with other agencies.

It shall be responsibility of contractor to monitor the works executed by other agencies which may affect the performance of HVAC system.

13.0 MATERIALS AND EQUIPMENT

All materials and equipment shall conform to the relevant Indian Standards and shall be of the approved make and design. Makes shall be strictly in conformity with list of approved makes enclosed in the tender.

14.0 MANUFACTURERS INSTRUCTIONS

Where manufacturer has furnished specific instructions, relating to the material and equipment used in this project, covering points not specifically mentioned in these documents, such instructions shall be followed in all cases.

15.0 ELECTRICAL INSTALLATION

The electrical work related to air conditioning services, shall be carried out in full knowledge of, and with the complete coordination of the contractor. The electrical installation shall be in total conformity with the control wiring drawings prepared by the contractor and approved by the owner/architect/consultant. All air conditioning equipment shall be connected and tested in the presence of an authorised representative of the contractor.

The air conditioning system shall be commissioned only after the contractor has certified in writing that the electrical installation work for air conditioning services has been thoroughly checked, tested and found to be totally satisfactory and in full conformity with the contract Drawings, Specifications and manufacturers instructions. It is to be clearly understood that the final responsibility for the sufficiency, adequacy and conformity to the contract requirements, of the electrical installation work for air conditioning services, lies solely with the contractor.

16.0 COMPLETION CERTIFICATE



On completion of the Electrical installation for air conditioning, a certificate shall be furnished by the contractor, counter signed by the licensed supervisor, under whose direct supervision the installation was carried out. This certificate shall be in the prescribed form as required by the local authority.

The contractor shall be responsible for getting the entire electrical installation for air conditioning system duly approved by the local authorities concerned, and shall bear expenses if any, in connection with the same.

17.0 BALANCING, TESTING AND COMMISSIONING

Balancing of all air and water systems and all tests as called for the Specifications shall be carried out by the contractor through a specialist group, in accordance with the Specifications and ASHRAE Guide lines and Standards. Performance test shall consist of three days of 10 hour each operation of system for each season witnessed by owner.

The results for summer, monsoon and winter air conditioning in quadruplicate, shall be submitted for scrutiny. Four copies of the certified manufacturers performance curves for each piece of equipment, high lighting operational parameters for the project, shall be submitted alongwith the test certificates. Contractor shall also provide four copies of record of all safety and automatic control settings for the entire installation.

The installation shall be tested again after removal of defects and shall be commissioned only after approval by the owner. All tests shall be carried out in the presence of the representatives of the owner/architect/consultant.

18.0 COMPLETION DRAWINGS

Contractor shall periodically submit completion drawings as and when work in all respects is completed in a particular area. These drawings shall be submitted in the form of two sets of CD’s and four portfolios (300 x 450 mm) each containing complete set of drawings on approved scale indicating the work as - installed. These drawings shall clearly indicate complete plant room layouts, ducting and piping layouts, location of wiring and sequencing of automatic controls, location of all concealed piping, valves, controls, dampers, wiring and other services. Each portfolio shall also contain consolidated control diagrams and technical literature on all controls. The contractor shall frame under glass, in the air-conditioning plant room, one set of these consolidated control diagrams.

19.0 OPERATING INSTRUCTION & MAINTENANCE MANUAL

Upon completion and commissioning of part HVAC system the contractor shall submit a draft copy of comprehensive operating instructions, maintenance schedule and log sheets for all systems and equipment included in this contract. This shall be supplementary to manufacturer’s operating and maintenance manuals. Upon approval of the draft, the contractor shall submit four (4) complete bound sets of typewritten operating instructions and maintenance manuals to owner. These manuals shall also include basis of design, detailed technical data for each piece of equipment as installed, spare parts manual and recommended spares for 5 year period of maintenance of each equipment.

20.0 ON SITE TRAINING



Upon completion of all work and all tests, the Contractor shall train the owner’s Engineers / Personnel in the operation, adjustment and maintenance of all equipment installed.

21.0 HANDING OVER OF SYSTEM

The system shall be taken over by owner after successful commissioning and completion of work in all respect.

22.0 MAINTENANCE DURING DEFECTS LIABILITY PERIOD

The defects liability period shall be as mentioned in tender document. 22.1 Complaints

The Contractor shall receive calls for any and all problems experienced in the operation of the system under this contract, attend to these immediately after receiving the complaints and shall take steps to correct any deficiencies that may exist.

22.2 Repairs

All equipment that require repairing shall be immediately serviced and repaired. Since the period of Mechanical Maintenance runs concurrently with the defects liability period, all replacement parts and labour shall be supplied promptly free-of-charge to the owner.

23.0 OPERATION AND MAINTENANCE DURING DEFECTS LIABILITY PERIOD

Contractor shall to carry out the operation of the HVAC installation during the defects liability period.

23.1 Operation contract (HVAC System)

i. 24 hours a day, year round by engaging one Operator & one Helper in each shift (Each shift is 8 hours duration) including relievers for the above staff for operating the system on all holidays / Sundays / weekly off.

ii. All stand-by equipment to be operated as per mutually agreed programme.

iii. Proper entry and upkeep of relevant log books. iv. Maintain complaints register. Submit weekly report. v. Proper housekeeping of all areas under the contract. vi. Prepare daily consumption report and summary of operation. 24.0 DEFECTS LIABILITY PERIOD

The defects liability period shall be as mentioned in the tender document which shall reckon from the date of commissioning & handing over the system during which period any or all components found to be defective shall be replaced or repaired free of charge and any shortcomings found in the system functioning as specified shall be rectified at no extra cost to owner.



B) DESIGN PARAMETERS: 1.0 Given below are some design parameters which should be followed in addition to those given in

various sections of technical specifications enclosed. 2.0 a) Temperature of chilled water entering the chiller ºC : 12.22 b) Temperature of chilled water leaving the chiller ºC : 6.67 c) Fouling factor of chiller (FPS) : 0.00050 d) Temperature of water to inlet of condenser ºC : 32.22 e) Temperature of water leaving the condenser ºC : 37.77 f) Fouling factor of Condenser (FPS) : 0.0010 3.0 AIR - HANDLERS

a) Maximum Face velocity across cooling coil MPM : 152.0 b) Maximum face velocity across pre-filters MPM : 152.0 c) Maximum water pressure drop across the coil in Mt. : 4.6 d) Maximum water velocity through coil in MPS : 2.5 e) Fan outlet velocity (maxm.) MPS : 10.0

4.0 AIR - WASHERS

a) Maximum Face velocity across cooling pad MPM : 152.0 b) Thickness of fill (in mm) : 200.0 c) Maximum face velocity across prefilters MPM : 152.0 d) Efficiency of air washer : 90 % e) Fan Speed (maxm.) of air washer unit RPM : 1000

5.0 DUCTING WORK

a) Method of Duct Design : Equal friction method

b) Maximum air velocity in supply duct MPM : 550.0

c) Maximum air velocity in return duct MPM : 305.0

d) Friction loss in duct (maxm.) MM Wg in 100 Mt run. : 8.33

e) Maximum Velocity at supply air grill outlet MPM : 150.00



6.0 PIPING WORK

a) Friction loss (maxm.) Mt / 30 Mt length : 1.60 b) Flow velocity (maxm.) Mt / Sec. : 2.50

7.0 INSULATION

Maximum temperature rise in the supply air duct from Air-handlers outlet to farthest outlet in ºC 1.10

8.0 REFRIGERANT The Imported Rotary Screw Water Cooled Chiller shall be selected for R-134A refrigerant.



C) STANDARD SPECIFICATION: 1.0 SCOPE OF WORK

The complete scope of work shall cover supply, erection, testing and commissioning of the entire HVAC system as detailed under specification.

2.0 BASIS OF DESIGN

The entire system has been based and designed on climatological data available as given under Basis of Design and Scheme.

3.0 TERMS AND DEFINATIONS

The followings terms have been used in the tender specifications, drawings etc. ISI Bureau of Indian Standards. ASHRAE American Society of Heating Refrigeration & Air-conditioning

Engineers, USA. ASME American Society of Mechanical Engineers.

ASA American Standard Association. B.S. British Standards. CMH Cubic Meter per Hour. US GPM US Gallons per minute. IGPM Imperial Gallons per Minute. RPM Revolutions per Minute. BTU/Hr. British Thermal Unit per Hour. Kcal/Hr. Kilo Calories per Hour. HZ Hertz. H.P. Horse Power Kg/Cm2 Kilo Gram per Square Centimeter. SAG Supply Air Grills. SAD Supply Air Diffuser. SAF Supply Air Filters.



FD Fire Damper. VCD Volume Control Damper. RAD Return Air Damper. FAD Fresh Air Damper. RH Relative Humidity. DB Dry Bulb Temperature. WB Wet Bulb Temperature. MV Mechanical Ventilation. DP Drain Point. VAV Variable Air Volume

4.0 The codes, regulation as detailed below shall be followed in this contract :-

1. Safety code for air-conditioning (revised) amendment 1 IS 659 : 1964 (reaffirmed 1991)

2. Safety code for mechanical

Refrigeration IS 660 : 1963 (reaffirmed 1991)

3. Thermostats for use in IS 11338 : 1965 refrigeration etc. (reaffirmed 1991)

4. Metal Duct Work IS 655 : 1963 (reaffirmed 1991) 5. Steel for general structural IS 2062 : 1992 purpose 6. Piping Work IS 1239 Part I & II 1990 / 1992 IS & BS : 3601 7. Welding IS : 3589 8. Refrigeration As per ASHRAE / ISI

Airconditioning & Refrigeration Air-conditioning institute Standards.

9. Hot Dip Zinc Coated Steel Tubes IS 4736 : 1968 10. Butterfly Valve IS 13095 : 1991



11. Steel Pipe flanges IS : 6392 12. Gaskets IS 638 : 1979 ( reaffirmed 1993) 13. Dual plate Check Valve for AP : 194 Water Lines 14. Colour code for the identification IS 2379 : 1963 of pipe lines 15. HRC Cartridge fuse links IS 2208 : 1976 upto 650 Volts. 16. Starter IS 8554 ( Part I) 1979 17. Inspection and testing of IS 732 ( Part III) 1979 installation 18. Galvanized steel wire IS 277 : 1977 19. Three phase induction motors IS : 325 20. PVC insulated ( heavy duty ) IS 1554 : 1981 Part I & II cables for working voltage up to 1.1. KV and up to 11 KV Grade respectively. 21. Code for practice for electrical IS 732 : 1989 wiring installations. 22. Code for practice for earthing IS 3043 : 1966 23. Horizontal centrifugal pumps IS : 1620 24. Bourdon tube pressure and vacuum IS : 3624 gauges. 25. Specification for single phase small IS : 996 A/C & universal motors 26. Circuit breaker A.C IS 2516 : 1980 Part I & II 27. Contactors for A.C for voltage IS 2959 : 1975 upto 1100 V. 28. Low voltage switch gear and control IS 8623 : 1993 Part I & II gear assemblies. 29. Code of practice for selection of IS 3914 starters for AC induction motors



30. Specification for cables glands IS 4821 31. Code for selection, installation & IS 10118 : 1982 Part I to IV maintenance of switch gear and control gear. 32. Conduits for electrical installations IS 9537 : 1981 Part I to IV 33. Permissible limits of noise level IS 12065 : 1987 for rotating electrical machines. 34. Code of practice for installation IS 3106 : 1966 and maintenance of motors

35. Gun metal valves IS : 778 36. Method for testing Panel type air IS 7613 : 1975 (reaffirmed 1991) filters for AC purposes. 5.0 SAFTEY CODES

The following IS codes shall be followed: Safety code for mechanical refrigeration IS 660 Safety code for air conditioning IS 659 Safety code for scaffolds & ladders IS 3696 Code of practice for fire precaution in IS 3016 Welding & cutting operations Code for safety procedures and practices IS 5216 In electrical works Code of practice for safety and health IS 3696 Requirements in electrical & gas welding And cutting operations.

6.0 SPACE

All shop drawings shall be prepared by the A.C Contractor after examining the Architectural & AC drawings.

7.0 TENTATIVE LAYOUT PLANS

The tentative layout plans enclosed with the tender documents are only for guidance purposes only.



D) NOISE AND VIBRATION CONTROLS: 1.0 The air conditioning contractor must take all necessary precautions to have minimum noise

generation and its transmission. Minimum vibration as permitted by IS relevant code shall be ensured. A few points for guidance only are given below:

2.0 a) Double fire retardant flexible connections shall be provided from air discharge to outlet

of air-handler to the duct.

b) Vibration isolation pads of suitable thickness commensurate to loading for isolation of vibration shall be provided under all pumps, air handlers fans etc. in consultation with manufacturer for proper selection of vibration isolators

c) Vibration isolation springs of suitable size to suit the weight of water chilling machine if

recommended by the manufacturer for elimination of vibrations shall be provided as suitable for type & model of water chilling unit.

d) All end suction pumps shall be bolted and grouted to the inertia base which in turn shall

be supported on suitable vibration isolation rubber pads duly sandwitched with 20G GI sheets. Concrete inertia blocks shall be formed of suitable thickness and of adequate mass.

e) The floor supported piping shall be mounted on pipe supports with 7.5mm ribbed

neoprene pads between the base plate of the pipes and the floors.

f) All items suspended from false ceiling shall be isolated on separate hangers.

g) In case of ducts, conduits, pipes & tubes the annular space between construction and penetrating element shall be sealed with sand cement plaster.

h) The air-conditioning contractor shall take all other precautions or shall make his own

arrangements even if not specified in the tender documents for eliminating high noise levels & shall minimize vibrations in all mechanical equipments without any additional cost to owner.



E) STANDARD SPECIFICATION OF ROTARY SCREW CHILLERS: I. ROTARY SCREW TYPE WATER CHILLING MACHINE

1.0 GENERAL The contractor shall furnish and install where indicated on plans water cooled water chilling

unit. The construction, performance and rating of the chillers shall be in accordance with latest ARI standard 550 / 590 -1998 and shall comply with ANS.B 9.1 safety code, National Electrical code and ASME pressure vessel code, section-VIII, division (1). Necessary 3 phase, 50 Hz, 415 volts, A.C. Power supply shall be made available for all units. The unit shall be guaranteed by chilling unit manufacturer to produce a capacity of not less than specified tons of refrigeration at specified leaving chilled water temperature, entering condenser water temperature, fouling factor. The chiller models offered should be either ARI or EUROVENT certified.

1.1 QUALITY ASSURANCE Compressor shall be dynamically balanced by the manufacturer and over-speed tested by the

manufacturer at a minimum of 120% design operating speed. Each compressor assembly shall under go a mechanical run-in test to check proper operation of various components and to verify that vibration levels, oil pressure / temperatures, and efficiency are within acceptable limits. Each compressor assembly shall be pneumatically proof tested at 232 psig for R-134a and leak tested with a tracer gas at 185 psig.

Both cooler and condenser shall be proof tested at 232 psig for R-134a on the refrigerant side

and leak tested with a refrigerant tracer gas at 185 psig. The waterside of each heat exchanger shall be hydro-statically tested at 1.5 times the rated working pressure.

The entire chiller assembly shall be leak tested with a refrigerant tracer gas at 300 psig. Prior to shipment the chiller controls shall be power tested to verify proper controls operation. Chiller shall be furnished with unit-mounted starters for compressor motor and shall be factory

tested under power to verify proper compressor rotation and proper starter operation prior to shipment.

1.2 DELIVERY, STORAGE AND HANDLING Unit shall be stored and handled in accordance with manufacturer's instructions. Unit shall be properly packed in wooden box secured tight on bottom planks with the help of

bolts. Weatherproof wrapping shall also be provided to avoid damage during shipping. Lifting lugs shall be clearly indicated for the ease of handling.

Unit shall be shipped with all refrigerant piping and control-wiring factory installed. Unit shall be shipped pre-charged with refrigerant and oil as specified on the equipment

schedule. Unit shall be shipped with firmly attached metal plates that indicate name of manufacturer, chiller model number, chiller serial number and refrigerant used.



1.3 WARRANTY Warranty shall include parts and labour for one year after start-up. Rates for Annual

Maintenance contract inclusive of labour and spares for three years after warranty period shall be quoted separately.

2.0 BASIC UNIT The unit shall consist in general of one / two semi hermetic / hermetic chiller, Microprocessor

based automatic control panel, Star Delta close transition type motor starter, accessories and devices as listed. The chiller package performance shall be tested as per ARI standards. These shall be suitable for HCFC-134a refrigerant.

3.0 COMPRESSOR MOTOR ASSEMBLY 3.1 Each unit shall have a rotary screw bolted semi hermetic / hermetic / open type compressors

horizontal or vertical type with field serviceable helical rotor / semi hermetic rotary type compressor duly sealed joints with “O” rings.

3.2 The rotary screw shall be manufactured from forged steel, with asymmetrical profiles. The

profile of screws, shall permit safe operation upto a Speed of 3000 RPM for 50 HZ operation. 3.3 The compressor housing shall be of high grade cast iron, machined with precision, to provide a

very close tolerance between the rotors and the housing. 3.4 The rotors shall be mounted on anti-friction bearings designed to reduce friction and power

input. There shall be multiple cylindrical bearings to handle the radial and axial loads. 3.5 There shall be built in oil reservoir to ensure full supply of lubricants to all bearings and a check

valve to prevent backspin during shut down.

3.6 There shall be oil pump or other means of forced lubrication of all parts during startup, running and coasting for shut down. An oil header shall be provided in the casing.

3.7 The unit shall be complete with capacity control mechanism, to permit modulation between 20% to 100% of Capacity range. The compressor control mechanism shall have automatic spring return capability to ensure return of capacity control valve to minimum load position to ensure starting of compressor at minimum load. The manufacturer shall submit the load position at starting point. The compressor shall unload from fully loaded to the minimum capacity by means of a hydraulically actuated slide valve.

3.8 An oil separator shall be included to remove oil from the refrigerant and there shall be suitable

heat exchanger for oil separation, if required. 3.9 The motor shall be suction or discharge gas cooled in case of hermatic/ semi-hermatic machines

having redundant overload protection having thermal overload as well as current overload protection.

3.10 Economizer, if provided in the design capacity, shall be constructed out of corrosion resistant

stainless steel plates so as to have turbulent flow and higher heat transfer area. The economizer shall be minimum tested for 450 psig as per ASME certifications.



3.11 Compressor shall be fully field serviceable with full acoustical attenuation as per ARI standard 575 (latest) and easily serviceable type compressor safeties shall also include high compressor discharge temperature, high motor winding temperature, low oil pressure, reverse rotation, high discharge pressure, motor over load protection.

3.12 Compressor shall be equipped with internal pressure relief valve to protect against over

pressure at high side and chiller shall be protected with an external relief valve.

4.0 CONDENSER 4.1 Condenser shall be of shell and tube type construction. Heat exchanger shall be fabricated with

high-performance tubing, steel shell and tube sheets with cast-iron water boxes. Water boxes shall be nozzle-in-head types with integral flanged water connections.

4.2 Tubing shall be copper, high-efficiency type, with integral internal and external enhancement.

Tubes shall be nominal 3/4" OD with nominal wall thickness of 0.025" measured at the root of the fin. Tubes shall be rolled into tube sheets and shall be individually replaceable. Tube sheet holes shall be double grooved for joint structural integrity. Cooler tubes shall be expanded into intermediate support sheets. Intermediate support sheet spacing shall not exceed 36 inches.

4.3 Water boxes and nozzle connections shall be designed for 150-psig maximum working pressure,

unless otherwise noted. Nozzles shall feature standard ASA flanged connections. 4.4 Pressure relief valves shall be installed on the heat exchanger. 4.5 Water boxes shall have vents; drains and covers to permit tube cleaning. A temperature sensor

shall be factory installed in each water nozzle. 4.6 The condenser shell shall include a thermal economiser, which cools the condensed liquid

refrigerant to a reduced temperature thereby increasing the refrigeration cycle efficiency. A compressor discharge isolation valve and liquid return isolation valve shall be factory installed to allow isolation of the refrigerant charge in the condenser.

5.0 COOLER 5.1 The cooler shall be direct expansion / flooded, shell and tube type, with steel shell and seamless

copper tubes. The refrigerant head shall be removable type. The tubes shall be supported in the shell by adequate stiff supports to eliminate vibrations and noise. The tube ends shall be fixed firmly into the tube sheets to prevent leakage of refrigerant gas.

5.2 The cooler shall be tested against leaks and stamped in accordance with ASME code for the

refrigerant being used and otherwise tested and constructed and tested in accordance with ASME or equivalent approved code requirements.

5.4 The cooler shall have one / two independent refrigerant circuits. 5.5 The cooler shall be factory insulated with 19 mm thick closed cell polyethylene/nitrile butile.



6.0 CONTROLS 6.1 All the controls shall be factory wired and located in a weather proof enclosure. These shall

include fuses, selector switch, oil safety switch, high and low pressure cutouts, interlocks for crankcase heaters and inherent motor protection devices, recycling pump-down circuit, high discharge temperature cutout indicator lamps shall be provided for the compressor units. The control center shall have a 40 / 80 character alphanumeric LCD display. All in one glance access to chiller operating area.

6.2 Necessary starters for compressor motors shall be included and provided within the unit. The

compressor, cooler and the condenser shall be electrically interlocked such that the compressor can run only when the water flow through both the heat exchangers is established. The chiller shall have factory installed microprocessor control for various control functions.

6.3 Water Chilling Machine Control System The water chilling unit shall be complete with microprocessor based type control system, which

shall have the following features :-

a. Self diagnostic capability to locate faults and give early warning. b. Leaving chilled water temperature control and reset capability. c. Automatic sequencing of various functions for starting, running and stopping of the

various components of the unit based on demand. d. A programmable microprocessor complete with key pad and LED display window to

perform the above functions. e. The control package shall also consist of, but not limited to the following components:

Low control voltage to unit. Field power and control circuit terminal blocks. On/off switch. Replaceable relay board. Leaving chilled water set point board. Diagnostic digital display module. Microprocessor board. Temperature reset board.

6.4 Service Function:

a. Capacity control shall be by means of slide valve located at the rotor inlet. Load modulation shall be from 100% to 20% of full load without the use of hot gas by-pass under normal ARI condition. The slide valve control shall be precise, positioned by a PID (proportional- integral- derivative) control algorithm to ensure precise control (+/- .5 degree F) of desired chilled water temperature without hunting or overshooting the set point.

b. The microprocessor control system shall include a programmed sequence to meet

prelube and postlube needs prior to machine start-up and during coast-down after machine stop. The microprocessor shall automatically activate and interlock the chilled water pump; condenser water pump and cooling tower fans upon chiller activation.



c. Upon request to start the compressor, the control system shall start the chilled water pump, condenser water pump and cooling tower fans; verify that flow has been established; and then compare leaving chilled water temperature with the chilled water set point. If the chilled water temperature is less than the chilled water set point, the control system will shut down the condenser water pump and wait for the cooling load to be established.

d. The control system shall include two compressor timers to protect the motor from

rapid cycling. The start-inhibit timer shall prevent rapid compressor restart by limiting the start time to 3 minutes minimum. In addition the compressor shall be inhibited from restarting from if more than 8 manual starts within a 12-hour period have occurred.

e. The control system shall automatically cycle the compressor off to minimise energy

usage whenever the leaving chilled water temperature is 5 degree F below the desired chilled water set point. The chilled water pump shall remain on, and when the leaving chilled water temperature rises above the set point by a user-configured amount, the compressor shall automatically be recycled back on. During the shutdown period, a message shall be displayed informing the operator a recycle restart is pending.

f. The control centre shall monitor line voltage and if loss of voltage, high or low line

voltage, or single cycle dropout is sensed, the chiller shall shut down. Upon restoration of line voltage, if the auto restart after power failure algorithm is enabled in the configuration mode, the chiller shall automatically restart and resume the mode of operation prior to shutdown.

g. The control centre shall allow reset of chilled water temperature set point based on

water temperature rise across the evaporator. Optional input/output module shall be provided so the following can also be achieved:

Chilled water reset based on 4-20 mA signal. Chilled water reset based on a remote temperature sensor (such as outdoor air). Remote start/stop. When reset is active a message shall be displayed indicating the type reset in effect. The control centre will limit amp draw of the compressor to the rated load amps or to a

value lower based on the following criteria: Demand limit based on user input ranging from 40%-100% of compressor rated load

amps. Demand limit based on an external 4-20 mA signal. When demand limit is active; a message shall be displayed indicating the source of

demand signal. 6.5 The microprocessor based control system shall maximize both compressor and motor life by

equalizing the number of starts and operating hours. The unit control module shall start the compressor with the least number of starts and turn off the compressor with most number of operating hours, thereby equalizing the starts and running hours and compressor wear.



6.6 Electronic Expansion Valve / Refrigerant flow control 6.6.1 Electronic Expansion Valve

The electronic expansion valve shall offer the possibility of additional actions to control the operation of the chiller unit. This valve shall optimize filling of the evaporator. A sensor shall measure over-heating at the evaporator outlet to adjust the flow of the refrigerant fluid during operation. By means of Control logic, the electronic expansion valve shall ensure more stable operation when the load or pressure in the cooling circuit undergoes variations. The electronic expansion valve shall not only be actuated by an oversize stepper motor, insensitive to the presence of particles in the circuit, it shall also be equipped with a self diagnosis function. Each time the chiller unit shall start the expansion valve shall undergo a series of tests to ensure it will operate correctly. The electronic module shall pre-position the expansion valve for each new operating state, so as to anticipate modification of operating parameters in a transient operating state.

6.6.2 Refrigerant Metering Device Liquid refrigerant from the condenser shall be metered using a direct acting float-type metering

device to maintain the proper liquid level of refrigerant in the heat exchangers under both full and part load operating conditions. Flow orifice shall have a liquid seal. The float device chamber shall have a bolted access cover to allow field inspection and float device shall be field serviceable. The control logic should intervene in the compressor's capacity control function to ensure that the chiller unit operates to the maximum of the available capacity.

6.7 The control logic shall make it possible to keep the chiller unit in operation and provide the maximum available capacity to rapidly satisfy demand. The control logic shall make it possible to rest the set point for water depending on the return water and ambient temperature without having to make use of external adjustment. The microprocessor shall monitor the following parameters and shall have provision to be connected to a printer for generating operating logs at pre-programmed time interval:

a. Entering and leaving chilled water temperatures

b. Entering and leaving condenser water temperatures c. Evaporator and condenser refrigerant temperatures and pressures.

d. Percentage line voltage. e. Compressor start and running hours. f. Active set points:

Chilled water reset Current limit set point

g. Part Failure diagnostics Water temperature sensors.

Refrigerant temperature sensors. Compressor contactors status.

Differential oil pressure switch.



It shall give audio alarm and screen display on equipment failure. Microprocessor control shall duly cycle the equipment, provide equal run time for all units and start the other compressor in case of failure of one unit.

6.8 Remote Display Panel The chiller shall be complete with remote display panel capable of providing display of following

data as minimum: All water temperatures and setpoints. Chiller operating mode. Current limit setpoint Saturated Refrigerant temperatures and pressures. Compressor Starts and Number of hours. Line currents and Voltages 7.0 REFRIGERANT CIRCUIT The refrigerant piping between compressors, chiller and condenser shall be of heavy gauge

copper with brazed joints. The circuit shall include sight glass, moisture indicator, solenoid valves, electronic expansion valves / metering devices, filter driers and necessary shut off valves with charging connections.

8.0 MISCELLANEOUS

Each unit shall be provided with the following:

8.1 Necessary full charge of refrigerant gas and lubricating oil. Interconnecting refrigerant piping.

8.2 External Control of chilled water temperature through a 4-20mA signal from other source.

8.3 Main incoming power disconnect in the panel.

8.4 MS Joists, channels and all other building works required for installation and commissioning. Steel structure as required for assembling / manufacturing above equipment.

8.5 Spring vibration isolators below the unit rated by the isolator manufacturers to absorb 90% of unit vibration and as approved by the engineer

8.6 Water flow switches at the outlet of chilling unit. 9.0 INTERLOCKS

Manual / automatic Remote start. Starting / stopping sequence. Pre flow/past flow. Compressor starter press interlock. Pre start check of safeties & Alerts. Low chilled water (load) recycle. Hours / Number compressor starts & hours. Manual reset of safeties.



10.0 INDICATIONS

Chiller operating status messages. Power on, pre start Diagnostic checks. Compressor motor Amps. Pre alarm alert. Alarm. Contact for remote alarm. Safety shutdown messages. Elapsed time (Hours of operation). Chiller input KW. An operating configurable custom report.

11.0 SAFETY CUTOUTS Each of these protective limits shall have manual reset and cause an alarm message to be

displayed at LCD screen informing the operator of shut down cause.

Motor high temperature. Refrigerant high pressure. Refrigerant low temperature. CLube oil low pressure.

Lube oil sump level. Compressor discharge temp. .

Under voltage. Over voltage. Cooler and condenser water flow. Motor over current. Motor Acceleration time. Intermittent power loss. Compressor starter fault. Excessive starter transition time. Lack of motor current signal. Motor power supply phase reversal Temperature sensor and transducer faults. Single cycle drops out. Motor miswired.

12.0 CAPACITY CONTROL.

Leaving and chilling water controls. Soft loading control by Temperature or load. Slide valve Actuator module. Hot gas by pass valve. Power (demand) limiter. Auto chilled water reset.

13.0 UNIT MOUNTED STARTER A Low transition Star Delta starter shall be supplied. The compressor motor starter shall be

factory mounted, wired and tested prior to shipment by the chiller manufacturer.



Following shall be included in the unit-mounted starters:

* IP 55 enclosure with hinged doors. * Main power disconnect (MCCB)

* Starter Management Module (SMM) to communicate with the chiller control system to perform starting and stopping of the chiller, water pumps as well as monitoring starter operation including single cycle dropout protection.

* Solid state 3-phase overload relay with manual reset. * 1.2 - 2 KVA Control/oil heater transformer.

* Branch circuit breaker for control power and oil heater. Pilot relays for controls of chilled water pump, condenser water pump, customer remote alarm, and main power disconnect shut trip.

Starters shall also include the following standard features: Current imbalance detector which monitors 3 phase motor current to provide the following

protection:- - Phase loss - Phase reversal - Phase imbalance - Ground fault - Shorted SCR - Current flow while stopped protection. * Diagnostic LED's shall be provided to indicate: - Starter on - Phase correct - Over temperature fault - Ground fault - Current imbalance fault - Current while stopped * Fuses that protect the solid-state circuitry at 50 kA interrupting capacity. 14.0 PERFORMANCE TEST The contractor shall carry out tests on equipment as specified in the presence of Owners /

Owners representative; Consultant in order to enable them to determine whether equipment installation in general comply with specifications.

The Refrigeration capacity of the unit shall be computed from the measurement of water flow

and entering and leaving water temperatures. Flow measurement shall be by accurately calibrated flow meter and temperature by Mercury in glass thermometer. Computed results shall confirm to the specified capacities and quoted ratings. The power consumption shall be computed from measurements of incoming voltage & input current. These tests shall be carried out during peak summer & monsoon season as under:

a. Main duration in continuous full load shall not be less than 72 hours.

b. Minor interruption during the trial run shall not exceed 4 hours at a time.



c. If the above conditions are not met, the period of trial run shall be extended as mutually agreed for.

Report of recordings of trial run shall be prepared by the contractor as per test result performa and submitted to Owners in triplicate.

15.0 POWER CONSUMPSION

The Water chilling unit should be selected for the duty as specified. The water chilling unit should be selected for power consumption of not more than 0.65 IKW / TR at 100 % load at operating conditions. The loading in price at the time of evaluation stage shall be done at the rate of Rs. 2.0 Lakh per chilling machine for every increase of 0.01 IKW / TR at 100 % load in machine IKW than the offered machine IKW by the bidder at satisfied condition in Schedule of equipment.

If the power consumption in KW / TR of the Rotary Screw Water Chilling Machine at 100 % capacity is found to be more than that offered by the bidder & accepted by the Client in the contract then for every increase of 0.01 IKW / TR over the aforesaid figure, a recovery of Rs. 2.0 Lakh per machine would be effected from the contract.



F) STANDARD SPECIFICATION OF PUMP SETS: (Chilled Water Primary, Secondary and Condenser Water)

1.0 GENERAL

This section comprises the supply, erection, testing and commissioning of Pumps required for the project.

2.0 DESIGN

The pump shall be capable of developing the required total head at rated capacity for continuous operation. The pump shall operate satisfactorily at any point on discharge head characteristic curve over a range of 30% to 120% capacity or capacity corresponding to 70% of the total head whichever is lower. The pump shall run smooth without undue noise, vibration.

3.0 CONSTRUCTION

Pumps shall be as per IS:1520-1660, IS:9079,IS:325 and shall be of the following construction:

S.No. Pump Description Horizontal Split Casing 1. Casing : Cast Iron as per IS :210; grade FG260 2. Impeller : Bronze as per IS : 318; grade - Impeller ring : Bronze 3. Shaft : High Tensile steel -EN8 or SS 410 Shaft sleeve : Stainless steel or Bronze 4. Bearings : Heavy duty Ball/Roller Bearings. 5. Base Plate : Cast Iron 6. Flanges : Conforming to I.S.1536/1960 7. Seal :Mechanical 8. Max. Speed : 1500 RPM 9. Driver : T.E.F.C. 10. Starter : See Schedule of Equipment.

Pumps of a particular category shall be identical and shall be suitable for parallel operation with equal load division. Components of identical pumps shall be interchangeable. Impeller shall be made in one piece and securely keyed to the shaft. Measures to prevent loosening during operation including rotation in the reverse direction shall be provided. The critical speed of the pump shall be at least 30% above the rated speed. All the pumps shall be provided with mechanical seals. Common base plate shall be provided for pump and motor. Suitable holes shall be provided for grouting and these shall be so located that the base can be grouted in place without disturbing the pump and the motor. Adequate space shall be provided between pump drain connection and base plate for installation of minimum 15mm dia. drain piping. Foundation bolts shall be complete with nuts and washers.



The performance curves (capacity vs total head, efficiency, NPSH and KW requirement) ranging from 0 to maximum capacity along with pump catalogue indicating dimensional details shall be submitted by the contractor alongwith their bid. Driver ratings shown are only tentative and contractor shall select their drivers at least 15% in excess of the maximum B.H.P of the pump plus transmission losses if any. Drivers shall be supplied with starters unless otherwise stated. Pump and driver shall be mounted on a single bed-plate and directly driven through flexible coupling in case of horizontal split casing pumps.

4.0 ACCESSORIES AND FITTINGS

The following accessories shall be provided with each pump among other standard accessories: Coupling guard for horizontal split casing pumps. Lubrication fittings and seal piping. Test and/or air vent cocks. Following valves / fittings shall be provided with each pump among other standard fittings as required (itemised separately in the schedule of quantities and prices of pumps shall not include prices of these items): Suction and discharge shut off valves (butterfly type) and discharge dual plate check valves as specified under section "PIPING". Suction and discharge pressure gauges not less than 100mm dia and of the appropriate rating with gauge cocks etc. suction gauge shall be of compound type. 25mm G.I. gland drain piping to be covered under drain piping item.

5.0 INSTALLATION

Pump shall be installed as per manufacturer's recommendations. Pump-sets shall be mounted on isolation pads or any other equivalent vibration isolation fitting. Concrete floating foundation shall be provided as per approved shop drawings and specifications. The isolation pads between foundation and floor (as mentioned in schedule of quantities), foundation bolts etc. shall be supplied by the contractor. Contractor shall ensure that the foundation bolts are correctly embedded. Pump-sets shall preferably be factory aligned, wherever necessary, site alignment shall be done by competent person. Before the foundation bolts are grouted and the couplings are bolted, the bed plate levels and alignment results shall be submitted to the Engineer in charge.

6.0 INSULATION

Pumps used for chilled water service shall be insulated as specified in section- "INSULATION". Insulation shall be applied so that the split casing is not affected. Accessories and fittings shall also be insulated as required.



7.0 TESTING

Tenderers shall submit the performance curves of the pumps supplied by them. They shall also check the capacity and total head requirements of each pump to match his own piping and equipment layout. On completion of the entire installation, pumps shall be tested, wherever possible, for their discharge, head, flow rate, B.H.P. Where it is not possible at least the discharge, head and B.H.P. (as measured on the input side) shall be field tested. Test results shall correspond to the performance curves.

8.0 PAINTING

After complete installation and testing, pumps accessories and fittings shall be given two coats of approved finishing paint.



G) STANDARD SPECIFICATION OF VARIABLE SPEED PUMPING SYSTEM: 1.0 VARIABLE PUMPING SYSTEM

This section deals with supply Erection, testing and commissioning of variable pumping system confirming to general specification and suitable for the duty selected as indicated in Schedule of Equipments / Materials, Section ACE-24. The type, capacity and size of pumps shall be as selections given under this section only. The Pumps selected should have a very high efficiency and supported by selection charts and curves. The pumps shall be used for air washers recirculation, air-conditioning applications.

2.0 GENERAL This section includes the following :

A. Variable Speed Pumping Package 1.0 Individual Components 2.0 Pump Control Panel

3.0 Adjustable Frequency Drive

4.0 Sensor Transmitters

5.0 Sequence of Operation

3.0 The following references has been broadly considered while designing variable pumping

system.

A. Hydraulic Institute B. ANSI - American National Standards Institute

C. NEMA - National Electrical Manufacturers Association

D. UL - Underwriters Laboratories Inc.

E. ETL - Electrical Testing Laboratories

F. CSA - Canadian Standards Association

G. NEC - National Electrical Code

H. ISO - International Standard Organization

I. IEC - International Electrotechnical Commission

4.0 The following submittals shall be submitted but not limited to the list given below by the HVAC

CONTRACTOR for approval.



1. System summary sheet

2. Sequence of operation

3. Shop drawing indicating dimensions, required clearances and location and size of each field connection.

4. Power and control wiring diagrams

5. System profile analysis including variable speed pump curves and system curve. The analysis shall also include staging points.

6. Pump data sheets The submittals must be specific to this project only & general submittals will not be acceptable.

5.0 QUALITY ASSURANCE

A. The pumping package supplier shall assume “Unit Responsibility” for the complete pumping package. Unit responsibility shall be defined as responsibility for interface and successful operation of all system components supplied by the pumping system supplier.

B. All function of the variable speed pump controller shall be tested at the factory prior to

shipment and it shall test all inputs, outputs and program execution specific to this application.

C. AC contractor shall comply with all sections of this specifications relating to packaged

pumping system. Any deviations from this specification shall be bid as alternate clearly defined in writing. If exceptions are not defined clearly the contractor shall be bound by these specifications only.

6.0 TOTAL HARMONIC DISTORTION

The variable speed drive shall include active harmonic filters to keep total harmonic distortion (THD) within limits conforming to IEEE for airport installation.

7.0 MANUFACTURED UNITS

A. Furnish and install as shown on the plans Variable Speed Pump controller. B. The control system shall include as, a minimum, pumps, the programmable logic pump

controller, adjustable frequency drive(s) and remote sensor / transmitters.

C. The pumps, variable speed pump logic controller, adjustable frequency drives and remote sensor / transmitter (s) shall be shipped as individual components to the job site.

D. Pumps, logic controller, adjustable frequency drives, sensor / transmitters and related

equipment shall be installed.



E. Line voltage power wiring shall be installed by the HVAC contractor as shown on the field connection drawings and wiring diagrams supplied with the pumping package.

F. Low voltage (24 VDC and 115 VAC) wiring shall be installed by the controls HVAC

Contractor as shown on the field connection drawings and wiring diagrams supplied with the pumping package.

8.0 COMPONENTS 8.1 PUMP LOGIC CONTROLLER

a) The Technologic pump logic controller assembly shall be listed by and bear the label of

Under writer’s Laboratory, Inc. (Canadian Standards Association (CSA) listing available upon request). The controller shall meet Part 15 of FCC regulations pertaining to class A computing devices. The controller shall be specifically designed for variable speed pumping applications.

b) The controller shall function to a proven program that safeguards against damaging hydraulic conditions including :

i) Motor overload

ii) Pump flow surges

iii) Hunting

iv) End of Curve.

c) The pump logic controller shall be capable of accepting 4 discrete analog inputs from zone sensor / transmitters indicated on the plans. The analog input resolution shall be 12 bit minimum, and the controller shall scan each analog input a minimum of once every 500 milliseconds. The use of a multiplexer for multiple sensor inputs is not acceptable. All sensor / transmitter inputs shall be individually wired to the pump logic controller for continuous scan and comparison feature.

d) The pump logic controller shall select the analog input signal which has deviated the

greatest amount from the set point. The selected signal will be used as the command feedback input for a closed loop hydraulic stabilization function to minimize hunting.

e) The hydraulic stabilization program shall utilize a proportional-integral-derivative

control function. The proportional, integral and derivative values shall be user adjustable over an infinite range. The scan can compare rate then selects the command set point and process variable signal shall be continuous and automatically set for optimum performance. Each sensor shall be scanned at least once every 500 milliseconds.

f) The pump controller shall be capable of controlling pumps in parallel as described in point 7B.64 of this section Sequence of Operation

g) The pump logic controller shall be self prompting & all messages shall be displayed in

plain English. The following features shall also be provided.



a) Multi-fault memory & recall. b) On – Screen help functions c) LED pilot lights and switches d) Soft-touch membrane keypad switches.

h) The variable speed pumping system shall be provided with a user friendly operator

interface complete with membrane switches and numeric keypad. Display shall be no less than four lines with each line capable of displaying up to twenty characters. The human interface panel shall display the following values :

a) Flow in GPM Pump b) On/Off Status c) Pump % Speed

d) Temperature in degree F or C e) Individual Alarm Conditions f) Trouble shooting diagnostics g) User adjustable parameters such as alternation, PID, set points, etc.

i) The pump controller shall communicate to the Building Automation System (BAS) by

both hard-wired and serial communications.

a) The following communication features shall be provided to the BAS in “hardwired” form via 4-20 MA analog signals and digital outputs :

1. Remote system start / stop ( dry contact supplied by BAS) 2. Failure of any system component (qty. 1, relay output from pump

controller) 3. Process variable (qty. 1, 4-20ma analog output supplied by pump

controller) 4. AFD speed (qty. 1, 0-10 VDC analog output supplied by pump

controller) 5. Optional : Pump on / off status (qty. 3 relay output supplied by pump

controller)

b) The following communication features shall be provided to the Building Automation System via an RS-485 port.

1. All sensor process variable. 2. Individual zone set points. 3. Individual pump failure. 4. Individual pump on / off status. 5. Individual AFD on/off status. 6. AFD speed. 7. Individual AFD Failure. 8. AFD bypass status (if automatic) 9. Individual sensor failure.

j) The pump logic controller shall be supplied by the pump supplier and the enclosure

shall be conforming to NEMA 1.



9.0 ADJUSTABLE FREQUENCY DRIVE.

i) The adjustable frequency drive (s) shall be pulse width modulation (PWM) type, microprocessor controlled design.

ii) The AFD, including all factory installed options, shall have CSA approval.

iii) AFD shall utilize a diode bridge rectifier to convert three phase AC to a fixed DC voltage.

Power factor shall remain above 0.95 regardless of speed or load. AFDs employing power factor correction capacitors shall not be acceptable.

iv) Insulated gate bipolar transistors shall be used in the inverter section to convert the fixed DC voltage phase adjustable frequency AC output. A DC line reactor shall be provided to minimize harmonic and current distortion of the input power line.

v) The following customer modifiable adjustments shall be provided:

a. Accel time : 0.1 to 1800 seconds b. Decel time : 0.1 to 1800 seconds c. Minimum frequency : 0HZ d. Maximum frequency : 120 HZ e. Analog input filter : 0.1 to 10 seconds f. Analog outputs filter : 10 to 1 gain.

g. Overload protection : 70 % - 100% to full load current. vi) Speed reference signal shall be customer selectable for 1-10 VDC or 4-20 MA.

vii) The AFD shall be capable of displaying the following information in plain English via a 40 character alphanumeric display :

a. Frequency b. Voltage c. Current d. Kilowatts per hour e. Fault identification f. Percent torque g. Percent power h. RPM i. Setting of O/L protection

viii) The AFD controller shall be suitable for elevation upto 1000 meters above sea level.

10.0 SENSOR / TRANSMITTER

To Provide 4 nos. field mounted differential pressure sensor transmitter(s) as indicated on the plans. Unit shall transmit as isolated 42Ma designed indicative of process variable to the pump logic controller via standard two wire 24 DC system. Unit shall have stainless steel wetted parts with 0.25” male NPT process connections. It shall be protected against ratio frequency interference and shall have a water tight, NEMA 4 electrical enclosure capable of withstanding 200 PSI static pressure with a 0.5” NPT conduit connection. Accuracy shall be within 025% of full span.



11.0 SEQUENCE OF OPERATION

i) The system shall consist of a Technologic pump logic controller, multiple pump / AFD sets with manual and automatic alternation and pump staging.

ii) The pumping system shall start upon the closure of customer’s contact when the pump logic controller Mode of Operation selector switch is in the REMOTE position.

iii) When the pump logic controller selector switch is in the LOCAL position, the pumping system shall operate automatically.

iv) Sensor / transmitters shall be provided as indicated on the plans.

v) Each sensor / transmitters shall send a 4-20Ma signal to the pump logic controller, indicative of process variable condition.

vi) The pump logic controller shall compare each signal to the independent, engineer / user determined set points.

vii) When all set points are satisfied by the process variable, the pump speed shall remain constant at the optimum energy consumption level.

viii) The pump logic controller shall continuously scan compare each process variable to its individual set point and control to the least satisfied zone.

ix) If the set point cannot be satisfied by the designed lead pump, the pump logic controller shall initiate a timed sequence of operation to stage a lag pump.

x) The lag pump shall accelerate resulting in the lead pump (s) decelerating until they equalize in speed.

xi) Further change in process variable shall cause the pumps to change speed together.

xii) When the set point criteria can be safely satisfied with fewer pumps, the Technologic pump logic controller shall initiate a timed sequence and continue variable speed operation.

xiii) As the worst case zone deviates from set point, the pump logic controller shall send the appropriate analog signed to the AFD to speed up or slow down the pump motor.

xiv) In the event of a system differential pressure failure due to a pump of AFD fault, the Technologic pump logic controller shall automatically start the next variable speed pump / AFD set in sequence and continue variable speed operation.

xv) In the event of the failure of a zone sensor / transmitter, its process variable signed shall be removed from the scan / compare program. Alternative zone sensor / transmitters, if available, shall remain in the scan / compare program for control.

xvi) The zone number corresponding to the failed sensor / transmitter shall be displayed on the operator interface of the pump logic controller.

xvii) In the event of failure to receive all zone process variable signals, all AFDs shall maintain 100% speed, reset shall be automatic upon correction of the zone failure.

xviii) PUMP or AFD fault shall be continuously scrolled through the display on the operator interface of pump logic controller until the fault has been corrected and the controller has been manually reset.



H) STANDARD SPECIFICATION OF INDUCED DRAFT COOLING TOWERS: 1.0 GENERAL

These specifications covers the general requirements of design, material, manufacture, inspections, testing at works, delivery, installation, performance testing and commissioning of induced draft cooling tower.

2.0 CODES AND STANDARDS

The design, manufacture, inspection and performance of induced draft cooling towers shall comply with all locally applicable, regulations and safety codes. The equipment shall also conform to the latest applicable Indian and/or International Standards.

3.0 DESIGN CRITERIA

The equipment offered shall be capable of cooling the rated quantity of water through the specified range at the design wet bulb temperature.

In multi-cell construction, each cell shall be identical with other cells of the tower in all respects. The total heat load and flow shall be equally shared amongst the number of operating cells.

The structure shall be designed for wind and other loads as per IS: 875. The tower configuration shall be such that it shall offer minimum restriction to airflow. The tower design shall be compatible with manufacture of pre-fabricated parts to achieve simple, inexpensive field erection.

4.0 CONSTRUCTION

The cooling tower shall be complete with tower, basin, foundation and mechanical equipment as described/required. The tower shall be of single or double inlet, counter flow type of construction. The tower shall be of induced draft type with fan located on top of the tower.

5.0 CASING

Towers shall be induced/forced draft type and in Fibreglass Reinforced Plastic construction. The enclosure/casing shall be single mounted and preferably rectangular shaped in appearance. The material of construction of enclosure/casing shall be F.R.P. and should be strong enough to withstand wind pressure. The casing shall be finished smoothly to minimize air friction.

Filling material shall be polyvinylchloride (PVC), shall be laid in a manner to achieve high heat transfer efficiency. Water collection sump shall also be of F.R.P. material and in single molded construction to make the sump leak proof. The tower shall be carefully designed to avoid probability of water spillage. The sump shall be complete with outlet, overflow, quick-fill and drain connections of adequate sizes.

Inlet louvers for air intake shall be provided.

6.0 INLET LOUVERS Louvers shall be given a proper slope. Spacing of the louvers shall be so arranged that the water loss is prevented. Design of louvers shall be such that it gives uniform distribution of air with minimum pressure drop.



7.0 FILL

Fill sheets shall be of heavy gauge fire-retardant PVC and shall be shaped to offer minimum resistance. Film type fill shall be supported and stabilised by structural tubing elevated above the cold water basin floor to facilitate cleaning.

8.0 DRIFT ELIMINATORS

The drift eliminators shall be designed to restrict the drift loss below 0.2 percent of the circulation rate. The air pressure drop across the eliminators shall be kept to a minimum. The water collected in the eliminators shall be returned to the tower basin and shall not mix with the discharge air stream.

9.0 WATER DISTRIBUTION

The hot water shall be distributed to the fill through distribution basin, troughs, distribution nozzles or orifices. The water shall be equally distributed among the working cells.

10.0 FAN DECK

Fan deck shall be sturdy in construction to transmit the live loads to the frame, to support the stack and act as an access platform for the mechanical equipment and distribution system.

11.0 HARDWARE

All hardware materials such as supporting angles, channel, rods, nut bolts etc. shall be of stainless steel.

12.0 FAN

Fan shall be of multi-blade construction with aerofoil section blades. Air velocity at the fan blade tip speed shall not exceed 65M/sec. Fan blade shall be of cast or moulded construction. These shall be of easily removable and adjustable pitch type. Blade shanks and hubs shall be suitably insulated to prevent electrolytic corrosion.

13.0 FAN DRIVES

Fan drive shall be either of direct drive type or reduction gear type. The drive shaft shall have flexible coupling at both driving and non-driving ends. The flexible coupling bushings shall be of rubber. Drive shaft shall be dynamically balanced.

14.0 FAN MOTOR Fan motor shall be an AC electric motor of squirrel cage induction type suitable for 3 phase 415 + 10% voltage variation, 50 Hz. The drive shall be weather proof with IP-55 protection. The fan motor shall be suitable for VFD operation.

Fan shall be protected with a Fan Guard. The entire assembly should be easily accessible for maintenance.



Complete performance ratings and power consumption at varying loads and outdoor wet bulb temperatures and sound power data at full load shall be furnished with Tenders and the same shall be verified at the time of testing and commissioning the installation.

15.0 ACCESSORIES

Cooling tower shall be provided with accessories stated as under:

a) A stainless steel pipe ladder from ground level for access to fan deck. b) The hot water distribution basin shall be provided with suitable cover to avoid external

falling objects. c) Each fan shall be provided with a suitable safety guard. d) Gauge type thermometer on the hot water inlet to each cell. e) Vibration isolators between fan and tower. f) Foundation bolts.

16.0 TESTS

After completion, the equipment shall be offered for visual inspection by Engineer-in-charge. Any work or component not in accordance with the specification and approved drawings shall be replaced to the entire satisfaction of the inspection authority.

Test certificates for materials of various components of cooling tower shall be furnished. Cooling capacities of the cooling tower shall be computed from the measurement of water flow rate, temperature of entering and leaving water and ambient air wet bulb temperature. Computed result shall conform to the specified capacities and quoted ratings. Power consumption shall be computed from the measurement of input voltage and input current. For every incremental KW of power (or part thereof) above the guaranteed power consumption of the fan penalty shall be levied. Noise level at various locations shall be measured at night, by a sound pressure level meter.



I) STANDARD SPECIFICATION OF ELECTRIC HOT WATER GENERATOR: 1.0 SCOPE

This section sets out the general requirements in respect of shell type hot water generator as per ASME Standards.

2.0 SHELL TYPE HOT WATER GENERATOR

The shell of the generator shall be vertical / horizontal, shell type, designed, constructed and tested for the specified water flow rates and temperatures. The hot water generator shall be suitable for Indoor / Outdoor application (exposed to sky)

3.0 MATERIAL DESIGN AND CONTRUCTION

The shell of the generator shall be made 10mm M.S steel sheet and dish of 12mm M.S steel sheet with electric fusion welded seams. In accordance with ASME section 4 / unfired pressure Vessel code IS 2825

4.0 HEATERS

Electric heaters shall be provided in banks of equal capacity distributed our three power phase, heaters shall be mounted within seamless copper / Incoloy sheathed electrically resistant U-tubes floor mounted with EPDM Rubber and S.S steel with magnesium anode for Longevity and easy maintenance of heaters. The heaters shall be easily removable externally, without opening terminal plate or disturbing other components. Heaters shall be suitable for 415 + 10% volts, 50 cycles, three phase AC supply and shall be in direct contact with water contained in shell.

5.0 CONNECTIONS AND ACCESSORIES Unless specified otherwise in the schedule of quantities the hot water generator shall be provided with following accessories.

a. Inter locking of electric panel cover with incoming switch / limit switch. b. Flow switch, automatic alarm for low water level and reset type high temperature switch

with respective indication lights. c. Drain point with GM valve. d. Descaling point with GM valve. e. Automatic airvent and automatic high temperature pressure relief valve. f. Step control thermostat for individual heaters bank / Master safety thermostat. g. Flanges for water pipe connections.

6.0 PRESSURE TESTING

The shell shall be tested in the factory upto two times the working pressure as specified by head of water column in tender or 21 kg/sq. cm. gauge whichever is higher.



7.0 INSULATION

The shell shall be insulated with 50mm thick resin bonded fiberglass wool insulation and covered with 26 SWG aluminium cladding.

8.0 ELECTRIC CONTROL CABINET

The electric control cabinet shall be made as detailed in electrical panels and mounted directly on main frame. All controls and terminals shall be factory wired and tested. The control cabinet shall consist of following major controls of rated capacities unless specified otherwise in tender. a. Incoming S.F.U / M.C.C.B b. ON / OFF Rotary switch for individual banks with light. c. SCR with MCB for individual heaters. d. Indicating lights for ON status for individual banks. e. Fault indicating lights. f. Alarm with manual reset. g. Cabling and control wiring. h. Three phase ammeter and voltmeter with selector switches. i. Control cabinet shall be BMS compatible.

The panel shall be open able only after switching off the incoming power supply. 9.0 PAINTING

The external surface of the shell shall be cleaned, derusted and applied with three with three coats of printer. The hot water generator shall be factory finished with durable Backed enamel paint on outside. Shop coats of paints that have become marred during shipment / erection shall be cleaned off with mineral spirits, then coated with enamel paint to match the finish over the adjoining shop painted surface



J) STANDARD SPECIFICATION OF DOUBLE SKINNED AIR HANDLING UNITS: 1.0 SCOPE

The Scope of this section comprises the supply, erection, testing and commissioning of air handling units conforming to these Specifications and in accordance with requirements.

2.0 TYPE

The air handling units shall be double skin construction, draw-thru type comprising of various sections, filter section, coil section and fan section, mixing box, (wherever the return air and fresh air are ducted) as shown on drawings and included in schedule of quantities.

3.0 CAPACITY

The air moving and coil capacities shall be as shown in schedule of quantities.

4.0 CASING

The housing/ casing of the air handling unit shall be of double skin construction. The housing shall be so made that it can be delivered at site in total/ semi knock down conditions depending upon the conditions. The framework shall be of extruded aluminium hollow sections fitted with pre-formed insulated sections. All the members shall be assembled thru mechanical joints to make a sturdy and strong framework for various sections. Double skin panels (each not exceeding 750mm wide) shall be made of 0.60mm pre-plasticised coated Galvanised sheet steel and 0.60mm galvanised sheet inside with minimum 25mm thick P.U. insulation of 38 Kg/Cu.M injected between the panels. Double skin panels (each not exceeding 750mm wide) shall be made of 0.60mm pre-plasticised coated Galvanised sheet steel and 0.60mm galvanised sheet inside with minimum 43mm thick P.U. insulation of 38 Kg/Cu.M injected between the panels for TFA’s and AHU’s in non A/C areas. The panels shall be bolted from inside on to the framework with soft rubber gasket in between to make the joints airtight. Suitable doors with powder coated hinges and latches shall be provided for access to various panels for maintenance. The Fan and the motor arrangement shall be mounted on to the extruded aluminum framework. The entire housing i.e. The Air Handling Unit shall be mounted on GI Base channel framework. Drain pan shall be constructed of 18 gauge SS sheet with 25 mm thick 38 Kq/Cu.M. nitrile foam insulation. The K-value shall not be more than 0.014 Kcal/hr-sq.mtr-C/M at 10C mean temperature. The pan shall have necessary slope to facilitate for fast removal of condensate. The coil shall be mounted on the rollers in order to facilitate easy removal of the coil from the drain pan for cleaning. Outlet shall be provided on both the sides of drain pan.



5.0 MIXING BOX

AHU’s requiring mixing boxes as specified in Schedule of Quantities shall be complete with fresh and return air dampers.

6.0 DAMPER

Dampers shall be opposed blade type. Blades shall be made of double skinned aerofoil aluminium sections with integral gasket and assembled within a rigid extruded aluminium alloy frame. All linkages and supporting spindles shall be made of aluminium or nylon, turning in teflon bushes. Manual dampers shall be provided with a bakelite knob for locking the damper blades in position. Linkages shall be extended wherever specified for motorised operation. Damper frames shall be sectionalised to minimise blade warping. Air leakage through dampers when in the closed position shall not exceed 1.5% of the maximum design air volume flow rate at the maximum design air total pressure.

7.0 MOTOR AND DRIVE

Fan motors shall be energy efficient (EFF-1) and shall be 415±10% volts, 50 cycles, three phase, totally enclosed fan-cooled class F, with IP-55 protection. Motors shall be especially designed for quiet operation and motor speed shall not exceed 1440 rpm. Drive to fan shall be provided through belt-drive arrangement. Belts shall be of the oil-resistant type.

8.0 FAN

Fans shall be centrifugal, forward inclined blades (upto 4000 cfm) and backward inclined blades (above 4000 cfm). Fans driven by variable frequency drive shall be backward inclined irrespective of static pressure value. Fan casing shall be made of galvanised steel sheet. Fan wheels shall be made of galvanised steel. Fan shaft shall be grounded C40 carbon steel and supported in self-aligning plummer block operating less than 75% of first critical speed, grease lubricated bearings. Fan wheels and pulleys shall be individually tested and precision balanced dynamically. Fan motor assembly shall be statically and dynamically balanced to G6.3 grade as per relevant ISO/AMCA standard. Computerized fan selection print outs shall be submitted along with the offer. Motors shall be mounted inside the AHU casing on slide rails for easy belt tensioning, and be totally enclosed,EFF1 fan cooled, to be class `F’ insulation. Motors shall drive heavy duty V-belt, constant pitch, drive selected at 110% of motor horsepower. Both fan and motors assemblies shall be mounted on a deep section aluminium alloy or galvanized steel (depending on size) base frame. Combination spring and rubber anti vibration mounts shall be provided for isolating the unit casing. Frame retardant, waterproof silicone rubber impregnated flexible connection shall be provided at the fan discharge.

9.0 COOLING COILS

Chilled water coils shall have 12.5mm (1/2") to 15mm (5/8") dia. tubes minimum 0.5 mm thick with aluminium fins firmly bonded to copper tubes assembled in a zinc coated steel frame. Face and surface areas shall be such as to ensure rated capacity from each unit and such that the air velocity across each coil shall not exceed 150 meters per minute. The coil shall be pitched in the



unit casing for proper drainage. Each coil shall be factory tested at 21 Kg./Sq.cm air pressure under water. Tube shall be hydraulically/mechanically expanded for minimum thermal contact resistance with fins. Fins spacing shall be 11 to 13 fins per inch (4 to 5 fins per centimeter).

10.0 FILTERS

Each unit shall be provided with a factory assembled filter section containing washable synthetic type air filters having anodised aluminium frame. The filter shall have minimum 90% efficiency down to 10 microns. The media shall be supported with HDPE mesh on one side and aluminium mesh on other side. Filter banks shall be easily accessible and designed for easy withdrawal and renewal of filter cells. Filter framework shall be fully sealed and constructed from aluminium alloy.

Design Parameters of Filters

Parameter Filter

Type Flange type

Grade EU-3

Efficiency 90% down to 10 micron Recommended size (mm) 610 x 610 x 50

Air flow (cfm 2000

Initial �P (mm) WG (clean condition) WG

5 mm

Final �P (mm) WG (clogged condition)

12 mm

Casing Aluminium Anodised

Sealing of medium Epoxy or equivalent

Medium Synthetic medium supported by HDPE mesh and aluminium mesh

No. of folds 20 Sample testing at Mfr’s works No

Packing Yes

Test Method BS-6540-Part-I / EN-779 Washable Yes

11.0 FILTER ASSEMBLY

The housing shall be made from extruded aluminium sections. All joints shall be sealed airtight and shall be made free of all burrs and sharp edges. The filter loading mechanism shall be sliding type or front loading type. The locking mechanism shall be a spring loaded, toggle type mechanism with a bolt and thrust assembly which shall thrust the filter evenly against the sealing flange of the housing when it is installed.



12.0 ISOLATORS

Vibration isolators shall be provided with all air handling units. The fan and motor framework shall be isolated from the AHU framework by means of spring type vibration isolators. The AHU shall be mounted on 8/9 nos. 200x200x200 P.C.C. blocks suitable for weight of the AHU. The framework of the AHU and the P.C.C. blocks shall be isolated by means of neoprene mats of size 150mmx150mm in two layers with 20g G.S.S. sheet sandwiched in between.

13.0 ACCESSORIES

Each air handling unit shall be complete with the accessories including but not restricted to the following. Insulated isolation valves, Y-strainer, header drain valves, unions and insulated

condensate drain piping upto sump or floor drain in air handling unit room / nearest point, as described in section "Piping of Schedule of quantities".

Manual air vents at high points in the cooling coil and drain plug in the bottom of the coil. – to be included in the cost of the AHU.

Thermometers in thermometer wells and pressure gauges in test points in chilled water supply and return lines. – to be included in the cost of the AHU.Air and Water side control as specified under section "Control and Instruments"

14.0 PAINTING

Powder coated paint that have become marred during shipment or erection shall be cleaned off with mineral spirits, wire brushed and spot primed over the affected areas, then coated with enamel paint to match the finish over the adjoining shop-painted surfaces.

15.0 NOISE CONTROL

Air Handling Units shall be selected for the lowest operating noise level of the equipment. Fan performance rating, power consumption, and sound power data with operating points clearly indicated shall be submitted with the tenders and verified at the time of testing and commissioning of the installation. The sound level within the AHU room shall be less than 75 dB.

16.0 CONNECTIONS

Piping installation requirements are specified in other section. The Drawings indicate the general arrangement of piping, valves, fittings, and specialities. The following are specific connection requirements:

Arrange piping installations adjacent to units to allow unit servicing and maintenance.

Connect piping to air-handling units with flanges enabling easy removal of the coil.

Connect condensate drain pans using 50 mm (2-0 inch) minimum, insulated G.I. pipe and extend to nearest floor drain. Construct deep trap (depth as per detail) at connection to drain pan and install cleanouts at changes in direction.

Duct installations and connections are specified in other sections. make final duct connections with flexible connections.

Electrical Connections: The following requirements apply:

Electrical power wiring is specified in section Electrical.



Temperature control wiring and interlock wiring is specified in Section "Electrical Control systems."

Grounding: Connect unit components to ground in accordance with the Indian Electrical Code.

17.0 ADJUSTING, CLEANING, AND PROTECTING

Adjust water coil flow, with control valves to full coil flow, to indicate l/s (gpm). Adjust damper linkages for proper damper operation. Clean unit cabinet interiors to remove foreign material and construction dirt and dust.

Vacuum clean fan wheel, fan cabinet, and coils entering air face. 18.0 COMMISSIONING

Final Checks Before Start-Up: Perform the following operations and checks before start-up:

Remove shipping, blocking and bracing. Verify unit is secure on mounting and supporting devices, connections for piping,

ductwork and electrical are complete. Verify proper overload protection is installed in motors, starters, and disconnects.

Perform cleaning and adjusting specified in this Section. Disconnect fan drive from motor and verify proper motor rotation direction and verify

fan wheel free rotation and smooth bearing operations. Reconnect fan drive system and align belts.

Lubricate bearings, pulleys, belts, and other moving parts with factory recommended lubricants.

Set outside-air / supply air dampers to minimum outside-air setting. Comb coil fins for parallel orientation. Install temporary throw away filters for initial run and finally install clean filters. Verify manual and automatic volume control, and fire dampers in connected ductwork

system are in the full-open position. Disable automatic temperature control operators. Starting procedures for central-station air-handling units: Energize motor, verify proper operation of motor, drive system, and fan wheel. Adjust

fan to indicate RPM. Replace fan and motor pulleys as required to achieve design conditions. Measure and record motor electrical values for voltage and amperage. Shut unit down and reconnect automatic temperature control operators.

19.0 TESTING

Cooling capacity of various Air handling units shall be computed from the measurements of air flow and dry and wet bulb temperatures of air entering and leaving the coil. Flow measurements shall be by a calibrated rotating vane anemometer and temperature measurements by accurately calibrated mercury-in-glass thermometers. Computed ratings shall conform to the specified capacities and quoted ratings. Power consumption shall be computed from measurements of incoming voltage and input current, whereas, noise level at various locations within the conditioned spaces shall be measured by a sound pressure level meter.



K) STANDARD SPECIFICATION OF FAN COIL UNITS: 1.0 SCOPE

The Scope of this section comprises the supply, erection, testing and commissioning of Fan Coil units conforming to these Specifications and in accordance with requirements of Drawings.

2.0 TYPE

The fan coil units shall be horizontal type for ceiling suspension. All units shall be complete with chilled water coil of three rows deep and one or more centrifugal fans and motor, cleanable filters as detailed in section Filters, double-walled insulated condensate drain pan as detailed in item drain pan, and 22 gauge galvanised steel casing panels insulated on discharge side of the fan. Horizontal units shall have U-slots in top panels for ease of installation. Horizontal fan coil units shall be provided with auxiliary secondary condensate drain pans.

3.0 CAPACITY The air moving and coil capacities shall be as scheduled B.O.Q. 4.0 CABINET

Cabinets shall be constructed of 22 gauge Pre coated GSS sheet steel, bonderized and provided with powder coated finish. Corners shall be rounded without break lines. The cabinets shall be of sufficient size to enclose all piping and control valves, and shall have access doors to piping and controls. Access panels shall have positive locking fasteners for easy removal. Cabinets shall be provided with all floor-mounted vertical units and ceiling-suspended horizontal units.

5.0 INTERIOR CHASSIS

The interior chassis shall be constructed of not less than 16 gauge galvanized steel sheet and coated with a rust inhibiting paint. All cold panel surfaces shall be covered with not less than 8 mm thick expanded poly-ethylene insulation. All fan coil units shall be securely mounted from the building structure and shall be set dead level in both directions.

6.0 DRAIN PAN

Primary drain pans shall be fabricated from 20 gauge galvanized sheet steel with all corners welded, and an additional inner bottom panel of 20 gauge galvanized sheet steel shall be provided to prevent damage to the bottom insulation panel. The pans shall be insulated with not less than 10 mm thick poly-ethylene insulation sandwiched between top and bottom panels to effectively prevent condensation. The pans shall be of sufficient size to catch all drippage of condensation from any part of the unit; in all cases pans shall be large enough to cover cooling coil supply and return water headers and bends, and control valves. An extension condensate pan similar to primary drain pan shall be provided by the manufacturer on those units where coil connections are to be made on both ends of the coil.



7.0 COOLING COIL

All coils shall be of staggered seamless copper tube with aluminium plate fins mechanically bonded to copper tubes. Number of the row for cooling coils shall be as called for in the schedule of quantities. Tubes shall be minimum 10mm OD and wall thickness shall be minimum 0.5mm. All bends and joints shall be enclosed within insulated end sections of the base unit for protection against sweating. Each coil shall be provided with an air vent and drain plug. All coils shall be factory tested at 21Kg. per Sq.cm (300 psig) air pressure while submerged in water. Fin spacing shall be 12 or 13 fins per inch. Tubes shall be Mechanically / Hydraulically expanded for minimum thermal contact resistance with fins.

8.0 FANS

Fans shall be centrifugal, forward-curve, direct-driven by a shaded-pole motor equipped with built-in overload protection.

9.0 MOTOR

Motor shall be 220+/- 10% volts 50 cycles, single phase, six-pole, shaded pole type, speed not exceeding 1050 RPM at maximum airflow. Motors shall have three speed windings and shall be factory-wired to a junction box.

10.0 ISOLATORS

Ceiling-suspended horizontal units and units mounted within the ceiling space shall be hung through neoprene in shear type vibration isolation suspensions, placed between the suspender rods of sizes as per the details.

11.0 ACCESSORIES

All fan coil units shall be provided with the following accessories as detailed item-wise in the schedule of quantities:

Wall mounted thermostat for individual unit, containing three-speed and on-off control for fan speed, temperature control for summer air conditioning. Set of Ball Valves (one with strainer) and 3/2-way motorized valve in water lines for individual unit for each coil connection. Fireproof double layer canvass connection. Flexible copper piping for each coil connection.

12.0 FILTERS

The filters shall be made out of minimum three layers of aluminium wire mesh woven in diamond shape. The filters frame work shall be out of aluminium channels. Thickness of filter shall be minimum 10 mm.

13.0 PAINTING

Powder coating that have become marred during shipment or erection shall be cleaned off with mineral spirits, wire brushed and spot primed over the affected areas, then coated with enamel paint to match the finish over the adjoining surfaces.



14.0 NOISE CONTROL

Fan coil units shall be selected for the lowest operating noise level of the equipment. Fan performance rating, power consumption and sound power data with operating points clearly indicated shall be submitted with the tenders and verified at the time of testing and commissioning of the installation.

15.0 TESTING

Cooling capacity of various fan coil units shall be computed from the measurements of air flow and dry and wet bulb temperatures of air entering and leaving the coil. Flow measurements shall be by a anemometer and temperature measurements by accurately calibrated mercury-in-glass thermometers. Computed ratings shall conform to the specified capacities and quoted ratings Noise level at various locations within the conditioned spaces shall be measured by a sound pressure level meter.



L) STANDARD SPECIFICATION OF PRECISION AC UNITS: 1.0 SCOPE

The scope of this section comprises the supply, erection, testing and commissioning of precision AC unit conforming to these Specifications and in accordance with requirements of drawings and of the Schedule of Quantities.

2.0 CAPACITY

The precision AC unit capacity & design parameters shall be as shown on Drawings and in Schedule of Quantities.

3.0 CASING

Double skinned panels shall be 23 mm thick made of galvanized steel, pressure injected with Foam insulation (density 40 kg/m3) with K factor not exceeding 0.02 Watt/Mc shall be fixed to 1.5 mm thick aluminium alloy twin box section structural framework with stainless steel screws. Outer sheet of panels shall be made of galvanized preplasticised sheet of 0.63 mm thick, and inner sheet of 24 Gauge plain G.I.Sheet. The entire framework shall be mounted on an aluminium alloy or galvanized steel (depending on size) channel base as per manufacturer’s recommendation. The panels shall be sealed to the framework by heavy duty `O’ ring gaskets held captive in the framed extrusion. All panels shall be detachable orhinged. Hinges shall be made of die cast aluminium with stainless steel pivots, handles shall bemade of hard nylon and be operational from both inside and outside of the unit. Units supplied withvarious sections shall be suitable for onsite assembly with continuous foam gasket. All fixing and gaskets shall be concealed. Units shall have hinged, quick opening access door in the fan section and also in filter section where filters are not accessible from outside. Access doors shall be double skin type.

4.0 COMPRESSOR

The compressor shall be hermetic / semi-hermetic sealed type and suitable for operation on Eco-friendly refrigerant R-407c/R-134 a/ R-410a. The compressor shall be located in separate compartment isolated from air stream to permit servicing without shutting down the system. Compressor shall be installed on spring mounted floating platform / rubber pads or manufacturer’s recommended approved mounting. The compressor should be capable of operating continuously even at design ambient of 42deg C (108 deg F). Suitable overload protection shall be provided in compressor. Isolating valves shall be provided at suction & discharge. Compressor shall be fitted with electrically operated oil heaters with built-in thermostats. Heaters shall be automatically actuated when the compressor is stopped. In built TIME DELAY shall be provide for restart of compressor.



5.0 COOLING COIL

Cooling coils shall be of fin and tube type having aluminium fins firmly bonded to copper tubes assembled in zinc coated steel frame. Face and surface areas shall be such as to ensure rated capacity from each unit and air velocity across each coil shall not exceed 500 FPM. The coil shall be pitched in the unit casing for proper drainage. Each coil shall be factory-tested at 21 Kg. per sq.cm air pressure under water. Tube shall be mechanically / hydraulically expanded for minimum thermal contract resistance with fins. The no. of fins per cm. shall be 4 to 5.

6.0 EVAPORATOR SECTION

Evaporator coil shall be constructed out of copper expanded on to aluminum fins to give a good mechanical bond for maximum heat transfer and should have hydrophilic coating. Approximately 12 to 14 number of fins per inch shall be provided. Face area of coil shall be selected corresponding to air velocity not exceeding 2.5 m/sec. A condensate drip tray duly insulated of stainless steel construction of minimum 18 SWG thick shall be provided.

7.0 BLOWER SECTION

The unit shall be under floor discharge type and should be able to deliver minimum 550 CFM per ton. Total external static pressure shall be 2.5 mm of WG. The fan speed of the blower should automatically vary as per the inside conditions during the operation on Chilled Water operation. The units should be equipped with direct driven backward curved radial fans with electronically commutated brushless motors & suitable for 415 + 10% variations 3 Phase, 50 Hz AC supply. The motor’s high efficiently should make for less energy absorption, especially at partial loads and during starting. The motor housing shall be of IP 54 or IP 55 grade. The fan shall be directly coupled / belt driven having a maximum speed of 1400 r.p.m.

8.0 DEHUMIDIFICATION SECTION

Dehumidification shall be achieved by either reducing effective coil area by solenoid valve arrangement or using Dew point method of control or through any other suitable method. Whenever dehumidification is required, the control system shall enable a solenoid valve to limit the exchange surface of the evaporating coil, thereby providing a lower evaporating temperature.

9.0 REFRIGERANT PIPING

Each refrigerant circuit shall be suitable for operation on R-407c / R-134 A/ R-410a and shall include the following items: a. Thermostatic Expansion Valve with external Pressure equalization. b. Removable liquid line drier / filter. c. Liquid Line Sight Glass with Moisture indicator. d. Hand Shut off valves / Shredder valves. e. Suction and discharge valves for isolation of compressor. f. Liquid line receiver.



The serviceable / removable components shall have union connection for easily removal / assembly. All pipe work shall be carried out with 16G refrigerant quality copper tube and where bends are required, the same shall be completed using either a proprietary bending tool or radius fittings.

10.0 ELECTRICAL SYSTEM

The electrical power system shall confirm to relevant IS standard. A main isolator (MCB) shall be provided by the side of each unit, sized to meet the system total power requirement. Within the panel individual power loads shall be distributed equally across the three phases. All individual wires shall be of cross linked polythene insulated, armoured Copper cabling, with a low smoke and flame sheath (XLPE/SWA/LSF) and colour coded or shall be numbered at their point of termination to facilitate servicing. Low voltage control wiring and power wiring shall be segregated from each other. The following shall be incorporated: a. Contactors for automatic Micro Processor Control b. Single phase preventors c. Separate over load preventor for all individual components.

11.0 AIR COOLED CONDENSER

Each condenser unit shall consist of a heat rejecting coil block constructed from copper tubes expanded on to straight aluminium fins. The fan shall be selected for low speed quiet operation. The fan shall be directly driven by a motor of speed not exceeding 1000 RPM and constructed from sheet and cast aluminium. When compressor stops condensor fan shall also stop after a suitable time delay. The fan should be complete with an automatic fan speed controller to maintain constant head under varying ambient conditions. The motor housing shall be of IP 65 grade. The condenser shall be flexible for mounting in both horizontal and vertical positions. The entire assembly shall be supported by a corrosion treated frame having four legs.

12.0 HUMIDIFIER & HEATERS The humidifier and heaters shall be a built in feature in each machine individually.

Humidification shall be provided by boiling water in steam generator. The steam shall be evenly distributed into the supply air stream of the Air Conditioning Unit. The humidifier shall be self cleaning and capable of delivering variable capacity steam from 30 % to 100% of its total capacity with help of microprocessor.

Microprocessor should be able to control the humidification and heating through suitable sensors. Heater should be of minimum two stages & heating circuit shall include dual safety protection through loss of air and manual reset high temperature controls.

13.0 FILTERS

Each unit shall be provided with a factory assembled filter section containing washable synthetic type air filters having anodised aluminum frame. The media shall be supported with HDP mesh on one side and aluminum mesh on other side. Filter banks shall be easily accessible and designed for easy withdrawal and renewal of filter cells. Filter framework shall be fully sealed and constructed either from aluminum alloy or GI powder coated. Filter banks face



velocities shall not exceed 150 Mt. / minute. The filter shall be suitable for high efficiency dust filtration.

14.0 SAFETY CONTROLS

Following minimum safety controls shall be provided for each unit : 1) High pressure trip - Manual reset (for each compressor) 2) Low pressure trip - Manual reset (for each compressor)

15.0 SAFETY INTERLOCKS

Operation of heaters & humidifier shall be possible only when blower fan is in operation. Condenser fan shall stop after a suitable time delay on Compressor’s stopping.

16.0 MICROPROCESSOR CONTROLS

Following information shall be available on the display on the units: a. Room temperature and humidity. b. Supply fan working status c. Compressor working status d. Condenser fans working status. e. Electric heaters working status f. Humidifier working status. g. Manual / Auto unit status. h. Line voltage value. i. Temperature set point. j. Humidity set point. k. Working hours of main component i.e. compressors, fans, heater, humidifier etc. l. Unit working hours. m. Current date and time. n. Type of alarm (with automatic reset or block) o. The last 10 intervened alarms. The microprocessor shall be able to perform following functions: a. Testing of the working of display system. b. Password for unit calibration values modification. c. Automatic re-start of program. d. Cooling capacity control. e. Compressor starting timer. f. Humidifier capacity limitation. g. Date and time of last 10 intervened alarm. h. Start / Stop status storage. i. Random starting of the unit. j. Outlet for the connection to remote system. k. Temperature and humidity set point calibration.. l. Delay of General Alarm activation. m. Alarm calibration. Following alarms shall be displayed on screen of microprocessor unit: a. Air flow loss. b. Clogged Filters.



c. Compressor low pressure. d. Compressor high pressure. e. Smoke - fire. f. Humidifier water level. g. High / Low room temperature. h High/Low room humidity. i. 2 spare external alarms. j. Maintenance request. The unit shall be able to maintain history of following events: a. Previous 10 faults. b. Highest / Lowest temperature. c. Maximum / Minimum RH. d. The microprocessor shall have a serial port or compatible output for connections to a

BACNET/IP/SNMP protocol, datacom or multicom for numerous remote control options.

e. Each microprocessor shall have the capability of linking up via high level interface with a

BMS for switching to a secondary unit upon any of eight (8) field selectable alarm signals (vendor to provide details of available options). Any BMS control function should be considered secondary to the duty/standby sequencing control of the PRESICION unit systems.

f. Automatic sequencing of PRESICION units shall be included to facilitate hours-run

equalization, rotation of first call plant, removal of failed units from sequence, and ensure sufficient frequency of usage to ensure reliable operation.

17.0 AIR FLOW SWITCH An air flow switch is fitted to all units, in order to ensure that electrical power is supplied to

high voltage components only when adequate air flow is proven. 18.0 FLOOR STAND The unit shall be supplied with an adjustable floor stand fabricated from structural steel and

painted to match the frame of the air conditioner. Nominal heights of floor stand shall be such that they shall flush with the top surface of the raised floor tiles. The height of the floor stand shall be adjustable plus or minus 36 millimeters. The 19 millimeters threaded rod pedestals shall have vibration pads and a two nut locking system.

19.0 SMOKE DETECTOR

The unit shall be supplied with a factory installed and wired smoke detector to sense smoke concentration in the return air. The smoke detector shall be specially designed to operate in the higher air velocities it will experience in the unit. Upon detecting smoke concentrations, the unit shall automatically stop the system and activate an alphanumeric “SMOKE ALARM” indicator and audible alarm on the Microprocessor Indicator Panel.



20.0 BUILDING AUTOMATION SYSTEM

For the integration of Microprocessor Panel of the chilling machine with the Building Automation System, an Interface Control Document shall be developed by BAS Contractor. It shall be responsibility of Supplier to provide following to BAS Contractor for preparing the interface. a. Hardware Protocol of Microprocessor panel. b. Software Protocol of Microprocessor panel. c. Communication structure relating to collection of message / event information. d. Description of the formatted packets / blocks of data which construct controller

commands / responses. e. Complete overview of the system. f. All information described above to be available at one point. g. Written permission to BAS contractor to develop the interface without any financial

implication. It shall be possible to duplicate all the information mentioned under Clause 3.14 on the BAS control station. Remote start / stop shall also be carried out through BAS. An auto / manual / stop changeover switch shall be provided on each unit with potential free contact at manual position.

Note : Only start/stop and duplication of data shall be carried out on BAS. Once switched ‘ON’, the operation of microprocessor unit shall be as per their standard built-in logic



M) STANDARD SPECIFICATION OF DX SPLIT SYSTEM: 1.0 SPLIT / DUCTABLE UNITS Air cooled split units shall be as per approved make, energy efficient hermitically or semi-

hermitically compressor complete with vibration isolators & factory installed controls (like HP & LP cutouts, inter locking Fan & Compressor, Thermostat with selector switch etc) & accessories including wiring. Efficient cooling coil shall be selected for low velocity with 3/8"/1/2" OD copper tubing having extended aluminium fins. Hydraulic expansion of tubes assures tight bonding between tubes & fins for high heat transfer. Tubes shall be arranged in a staggered design for best air contact thus giving low bypass. The cooling coil circuits are fed with liquid refrigerant through the thermostatic expansion valve and a distributor. Blower of an evaporating unit shall be statically and dynamically balanced and shall be selected to give required airflow as identified in the drawings. Filters shall be minimum 25mm thick synthetic type or equivalent wire aluminium frame. Drain pan shall be of 18 gauge insulated with expanded polyethylene sheet. Casing shall be heavy gage factory painted to provide better protection against rusting.

Remote air cooled condensing unit shall have to be most efficient condenser coils made out of

copper tubing with extended aluminium fins. Tubes shall be arranged in a staggered design for better efficiency. Condenser fans shall be selected to operate quietly for required CFM to keep condensing temperature low. The compressor may be in the indoor unit or with the outdoor unit, but, it should be capable of operating continuously even at high ambient of 46 deg C (115 deg F). The condensing unit shall be installed with steal base frame, along with cushy foot mounting vibration isolation pads.

Interconnected refrigerant piping between outdoor unit & indoor unit shall be of heavy gauge

copper complete with thermostatic expansion valve, liquid line strainer, drier, shut off valves, high & low pressure gauges including insulated suction line. 25mm thick neoprene rubber pads shall be supplied for each indoor/outdoor units. The units shall be tested in accordance with IS:1391.

2.0 HIGH WALL MOUNTED UNITS The units shall be wall-mounted type. The units includes pre-filter, fan section and DX coil

section. The housing of units shall be light weight powder coated galvanized steel. Units shall have an attractive external casing for supply and return air.

3.0 INSTALLATION The units shall be mounted on ribbed rubber pads for vibration isolation. The contractor shall

supply the required charge of refrigerant, lubricant and other consumables, for commissioning and testing of the equipment.

All the equipment shall be thoroughly tested and checked for leaks. All safety controls shall be

suitably set and a record of all setting shall be furnished to the project supervisor. 4.0 TESTING Unit capacity in tons Refrigeration, shall be computed from the temperature readings and air-

flow measurements. Flow measurements shall be preferably by a hot-wire anemometer or a



velometer. Computed results shall conform to the specified capacities and the power consumption shall conform to the figures furnished by the manufacturer.

5.0 PAINTING Shop coats of paint that have become marred during transportation or erection shall be cleaned

off with mineral spirits, wire brushed and spot primed over the affected areas, then coated with enamel paint to match the finish over the adjoining shop- painted surfaces.

6.0 CONDENSER DRAIN PIPING All pipes to be used for cold water (makeup), drain, and condensate drain shall be PVC pipe 16

Kg/m2 conforming to IS: 4985 - Class I & all joints should be Gluing or solvent cementing as per manufacturer recommendation.


a. All refrigerant pipes and fittings shall be type `L' hard drawn copper tubes and wrought copper fitting suitable for connection with silver solder phos copper.

b. All joints in copper piping shall be sweat joints using low temperature brazing and/or

silver solder. Before jointing any copper pipe or fittings, its interior shall be thoroughly cleaned be passing a clean cloth via wire or cable through its entire length. The piping shall be continuously kept clean of dirt etc. while construction the joints. Subsequently, it shall be thoroughly blown out using carbon dioxide/nitrogen.

c. Refrigerant lines shall be sized to limit pressure drop between evaporator and

condensing unit to less than 0.2 kg per Sq.cm. d. Removable type combination drier and filter shall be installed in liquid line of the

refrigeration system incorporating a three way valve bypass. After ninety days of opera-tion, liquid line drier and filter cartridges must be replaced.

e. After the refrigerant piping installation has been completed the refrigerant piping

system shall be pressure tested using, Freon mixed with nitrogen/carbon dioxide at a pressure of 20 Kg per Sq. cm. (High side) and 10 Kg per Sq. cm (Low side) pressure shall be maintained on the system for a minimum of 12 hours. The system shall then be evacuated to a minimum vacuum of 70 cm. of mercury and held for 24 hours, during which time, change in vacuum shall not exceed 12 cm of mercury. Vacuum shall be checked with vacuum gage.

f. All refrigerant piping shall be installed strictly as per the instructions and

recommendations of air conditioning equipment manufacturers. 8.0 TESTING & BALANCING

a. All piping shall be tested to hydrostatic test pressure of at least two and half times the maximum operating pressure, but not less than 24 hours. All leaks and defects in joints revealed during the testing shall be rectified and gotten approved at site.



b. Piping repaired subsequent to the above pressure test shall be retested in the same manner.

c. System may be tested in sections and such sections shall be securely capped, then

retested for entire system. d. The contractor shall give sufficient notice to all other agencies at site, of his intention to

test a section or sections of piping and all testing shall be witnessed and recorded by Owner's site representative.

e. The contractor shall make sure that proper noiseless circulation of fluid is achieved

through all coils and other heat exchange equipment in the system concerned. If proper circulation is not achieved the contractor shall rectify the defective connection. He shall bear all expenses for carrying out the above rectifications, including the tearing up and refinishing of floors and walls as required.

f. The contractor shall provide all materials, tools, equipment, instruments, services and

labour required to perform the test. g. Complete certified report shall be submitted for evaluation and approval. Upon

approval, four copies of the balancing report shall be submitted with complete drawings and documents.

.



N) STANDARD SPECIFICATION OF PIPING WORK: 1.0 SCOPE

The scope of this section comprises the supply and laying of pipes, pipe fittings and valves, testing and balancing of all water and refrigerant piping required for the complete installation as shown on the Drawings. All piping inclusive of fittings and valves shall follow the applicable Indian Standards.

2.0 PIPE SIZES Pipe sizes shall be as required for the individual fluid flows. Various pipe sizes have been indicated on the Drawings, these are for Contractor’s guidance only and shall not relieve contractor of responsibility for providing smooth noiseless balanced circulation of fluids. i. Water velocity in pipes shall not exceed 2. m/sec.

3.0 CHILLED WATER/ CONDENSER WATER & DRAIN PIPING Following material shall be used for pipes and fittings.

Pipes Nominal size (mm) Material Specification <150 IS 1239 Part-1 (Mild steel medium class (Black steel)

tube) 200 and above IS 3589 Gr. FE 48 (6mm thick <300NB, 8mmthick >

300NB & < 600NB, 10mm thick above 600 NB) (welded black steel pipe, class 2)

Fittings Nominal size (mm) Material Specification <40 Socket welded, ASTM A85 as per ANSI B16.9 50-150 Butt welded, ASTM A234 Gr. WPB as per ANSI B16.9 >200 Site fabricated from IS 3589 Gr. FE 48 (6mm) Flanges Nominal size (mm) Material Specification < 150 ASTM A85 as per ANSI B16.5 (#150 class) > 200 IS 2062 Gr.A, as per ANSI B16.5 (#150 class)

All jointing in the pipe system shall generally be by welding, unless otherwise mentioned, or directed at site. All welding shall be done by qualified welders and shall strictly conform to BIS Code of practice for manual metal arc, welding of Mild Steel. Out of three weld one butt weld of each welder shall be fully radiographed for testing purposes. Upon approval of welding joints the concerned welder shall be allowed to carry further welding of pipes. Rest of the welds shall have 80% visual inspection. a. All welded joints (except pipe welded end-to-end) shall be made by use of one-piece

welding flanges, caps, nozzles, elbows, branch outlets and tees of approved make. Cut samples shall be submitted for approval, if directed. All such fittings etc., shall be of a type which maintain full wall-thickness at all points, simple radius and fillets, and



proper bevels or shoulders at ends. All job welding shall be done by the electric arc welding process in accordance with the following :

All joints shall have 45 degree bevel type, pipe mill-bevelled or machine-bevelled by

the contractor. All scale and oxide shall be removed with hammer, chisel or file and bevel left smooth

and clean. Pipe lengths shall line up straight with abutting pipe ends concentric. Both conductors from the welding machine shall be extended to locations at which

welding work is being done. The leads from welding machine to location of welding work shall be held together with tape or other approved means so as to prevent induced current in structural steel, in piping or in other metals within the building. The ground lead shall be connected to length of pipe through joints in pipe, structural steel of building or steel pipe supports.

b. All pipes and their steel supports shall be thoroughly cleaned and given one primary

coat of red oxide paint before being installed. For vibration isolators remoulded polyurethane pipe sections of 160 Kg/m3 density with adhesive shall be fixed between pipe and MS support. 8 mm thick MS ‘U’ clamp with resistoflex shall be fixed on the pipe so that the pipe is kept in position. All welded piping shall be subject to the approval at site.

c. Fittings shall be malleable casting of pressure rating suitable for the piping system.

Fittings used on welded piping shall be of the weldable type. These shall form part of piping and are not separately identified in Schedule of Quantities.

d. Tee-off connections shall be through equal or reducing tees, otherwise ferrules

welded to the main pipe shall be used. Drilling and tapping of the walls of the main pipe shall not be resorted to.

e. Ball and butterfly valves conforming to the following specifications shall be provided

as shown on Drawings:

---------------------------------------------------------------------------------------------------------------- Size Construction Ends Type ---------------------------------------------------------------------------------------------------------------- 15 to 40 mm Brass Screwed Ball

ASTM B62

50 mm and over Body Cast iron, Wafer Butterfly

Type and requirements shall be as indicated in Schedule of Quantities. Valves shall have non-rising spindles unless specified otherwise and shall be suitable for PN 10/ PN 16 rating as indicated in the schedule of quantities.

4.0 BUTTERFLY VALVES

Butterfly valves shall perform the function of isolating valves. Butterfly valves shall have cast iron body with black nitrile rubber seat and shall be suitable for PN 10/ PN 16 rating as



indicated in the schedule of quantities. All butterfly valves shall be provided with locking devices. Valves 250 mm and above dia shall be gear driven. Butterfly/Ball valves shall be provided at i. Suction and delivery side of pumps. ii. Inlet and outlet of each condenser, chiller & cooling towers. iii. Inlet and outlet of AHU, FCU, TFA etc. iv. All drain connection from equipments.

5.0 MOTORISED BUTTERFLY VALVES

Motorised Butterfly valves shall be made of cast iron body, seat of black nitrile rubber (tight shut-off), nylon coated S.G. iron disc, PTEE coated SS (AISI 410) shaft, complete with companion flanges, nuts, bolts, gaskets etc. as required. These valves shall conform to BS:5155, MSS SP 67 & API 609and shall be designed to fit without gaskets between mating flanges. The valves shall be suitable for flow in either direction and seal in both directions. The valve shall be of integral moulded design. Actuator shall have potential free contacts for status monitoring. The valve shall be complete with (Push Button for ON/OFF arrangement & ON/OFF valve indications) companion flanges, nuts, bolts, gaskets etc.

6.0 AUTOMATIC BALANCING VALVES

Automatic balancing valves shall automatically control flow rates with + 5% accuracy. Valve control mechanism shall consist of a stainless steel cartridge with a ported cup and coil / helical spring to avoid corrosion. Four operating ranges shall be available with the minimum range requiring less than 14 kPa to actuate the mechanism. Manufacturer shall provide independent laboratory tests verifying assurance of performance.

7.0 MANUAL DOUBLE REGULATING BALANCING VALVES

Manual double regulating balancing valves shall be provided at chiller, condenser, various tapp-offs and each AHU outlet line as indicated in Schedule of Quantities. These valves shall have built-in pressure-drop measuring facility to compute flow rate across the valve. The test cocks shall be long enough to protrude out of pipe insulation. To enable accurate and practical operation, measurement of flow and differential pressure shall be made with a computerised balancing instrument which shall enable the operator to read the flow directly without the use of diagrams or tables. In addition to measuring flowrate, differential pressure and temperature, computerised balancing instrument shall have a computer programme to provide the following functions: To balance the HVAC installation and calculate the necessary valve settings, based on

system measurements. To store the results of balancing. To log measured values from a valve (differential pressure, flowrate or temperature). To printout saved data in computerised measurement protocol (CMP) consisting of:

- Name and size of Balancing Valve (BV) - Presetting position of BV - ΔP at BV - Flow at BV - Design Flow



8.0 Flanges shall be of approved make. The supply of flanges shall form part of piping (not separately identified in Schedule of Quantities) and shall also include supply of bolts, washers, nuts and suitable asbestos fibre / rubber insertion gaskets (minimum 3 mm thick).

9.0 All ball valves and ball valves with Y strainer shall be bronze forged body construction with

chrome plated bronze ball and handle of stainless steel constructions. These are separately identified in Schedule of Quantities.

10.0 NON RETURN VALVES

Non return valves shall be dual plate check valve provided as shown on the Drawings, and identified in Schedule of Quantities conforming to relevant Codes and in accordance with the following Specifications : ---------------------------------------------------------------------------------------------------------------- Size Construction Ends ---------------------------------------------------------------------------------------------------------------- 50 to 150 mm Body cast iron, Flanged

gun metal plate.

200 mm to 450 mm Body cast iron, plate Flanged carbon steel with 11% chrome overlay.

The spring and hinge/stop pin shall be SS304 and bearing PTFE material. Valves shall be PN 10/ PN 16 rating as indicated in the schedule of quentities.

11.0 Y-STRAINER & POT STRAINER

The Y-strainer shall be fabricated out of MS `C’ class pipe two size higher than that of strainer pipe size. Flanges as per BS 10 shall be provided at inlet & outlet of connections. The body shall be pressure tested at 10 Kg/Sq. cm and shall be hot dip galvanized. Permanent magnet shall be provided in the body of the strainer to arrest MS particles. Filter element shall be of nonmagnetic 20 gauge SS sheet with 3 mm perforation. Strainer shall be provided at inlet of each AHU & chilled water pumps, Pot Strainer be fabricated of steel bodies designed to stand the test pressure of PN 16. The strainers shall have removable stainless steel screen with 3mm perforation and a permanent magnet to attract the iron particles. Strainers shall be provided with flanged ends. The Strainers shall be designed in such a way that the removal & replacement of the screen could be done without disconnecting the main pipeline. The strainers shall also designed to provide the filtration area having 1:4 ratio. The Y-Strainer & Pot Strainer confirming to SSPL 107 & ordinary shall have steel body and factory tested at works at 16 Kg/sq. cm pressure. The screen shall be made out of 3 mm perforated stainless steel sheet. It should be easily removable when required to be cleaned. Isolating butterfly valves at either end of the pot strainer shall be provided.



12.0 EXPANSION BELLOWS The expansion bellows shall be flanged type expansion joint. Flanges shall be non-compressible and mechanically strong tye and the Neoprene rubber shall be provided in between the flange ends. The below shall works for a temperature range of minus 10°C to 70°c. The length and working pressure of bellows shall be as follows:

Nominal Bore (mm) Length (mm) Pressure (Bars) 20-25 125 15

32-200 150 15 250-350 200 10

Bellows shall be provided with control roads to control the excessive elongation or compression of piping systems. It shall have torsional movement up to 3° without damage. In plant room pipe shall not be supported from ceiling and shall have steel supports of adequate strength firmly fixed to the floor only.

13.0 BTU METER

Meter should be a tamper proof meter with Single button design. No tampering can be done on the meter through the keypad. Parameters of the meter can be changed through software only. Meters need to be calibrated Online after installation to guarantee Accuracy. The calibration have to be done onsite after installation and the same is mandatory for every meter installed

All meters need to be wet calibrated (temperature sensor and flow meter need to be calibrated together) and calibration certificate to be provided for the BTU meters

Meters need to have an inbuilt battery backup – guaranteed for a minimum of 6 years. There is no requirement of Power supply.

The flow sensor needs to be a high capacity flow meter and can take velocities as high as 10 m/s.

One single model for line sizes ranging from 15mm to 700mm.

Meters need to be CE certified and needs to have IP68 Protection

Meter should have the facility to be used as a hot meter as well as a cold meter without any modifications. The meter should have auto switching of Hot/ Cold meters

14.0 COLD WATER AND DRAIN PIPING

a. All pipes to be used for drain from AHU drains pans and chilled water pumps glands,

condensate drain and fittings shall be high density PVC pipe/ G.I. class B type.



b. All jointing in the pipe system shall be by screwed joints and/or by screwed flanges using 3mm 3 ply rubber insertion gaskets. Pipe threads and flanges shall be as per relevant BIS Codes.

c. All pipes supports shall be mild steel, thoroughly cleaned and given one primary coat

of red oxide paint before being installed. d. Fittings shall be galvanized steel `medium class’ malleable casting of pressure rating

suitable for the piping system. Flanges shall be of approved make. Supply of flanges shall include bolts, nuts, gaskets as required. Sufficient number of flanges and unions shall be provided for future cleaning and servicing of piping. Tee-off connection shall be through equal or reducing tees. All equipment and valve connections, or connections to any other mating pipes shall be through flanges required for the mating connections. Fittings & flanges shall form part of piping and are not separately identified in Schedule of Quantities.

e. Gate valves, globe valves, check valves and strainers shall be similar to those specified

for chilled, condensing and hot water piping. f. For proper drainage of AHU Condensate, ‘U’ trap shall be provided in the drain piping. g. All condensate drain piping shall be insulated and painted as per the section

“Insulation” as indicated in Schedule of Quantities.

15.0 G.I. PIPES & FITTINGS FOR SUMP a. All galvanized steel tube shall be conforming to IS 1239 class specified. When class is

not specified they shall be heavy class. b. Fittings shall be of malleable iron galvanized of approved make. Each fitting shall have

manufacturer’s trade mark stamped on it. Fittinga for G.I. pipes shall include couplings, bends, tees, reducers, nipples, unions and bushes. Fittings shall conform to I.S. 1879-(Part I to X).

c. Pipes and fittings shall be joined with screwed joints. After cutting a pipe with a

hacksaw or a cutting machine care shall be taken to remove burr from the end of the pipe after reaming with a proper file.

d. Threaded joints will be made by applying non toxic pipe sealent for metal joints as per

BS 5290. Or with pipe sealing cord sealant as per manufacturer’s recommendations used for drinking water supply. Use of red or white lead and sutli will not be permitted for screwed joints.

e. No pipes shall be run inside a sunken floor as far as possible. Pipes may be run under

the ceiling. f. Pumps suction and delivery headers shall be Galvanized iron pipes/MS heavy class

with matching fittings. The pipe joints shall be threaded as per manufacturer’s instructions.

j. Vibration Eliminators



Provide on all suction and delivery lines as shown the drawings double flanged reinforced neoprene flexible pipe connectors. Connectors should be suitable for a working pressure of each pump and tested to the test pressure given in the relevant head. Length of the connectors shall be as per site requirements in accordance with manufacturer details.


a. All refrigerant pipes and fittings shall be hard drawn copper tubes and wrought

copper / brass fittings suitable for connection with silver solder / phos-copper. b. All joints in copper piping shall be sweat joints using low temperature brazing and / or

silver solder. Before jointing any copper pipe or fittings, its interiors shall be thoroughly cleaned by passing a clean cloth via wire or cable through its entire length. The piping shall be continuously kept clean of dirt etc. while constructing the joints. Subsequently, it shall be thoroughly blown out using carbon dioxide / nitrogen.

c. Refrigerant lines shall be sized to limit pressure drop between the evaporator and

condensing unit to less than 0.2 kg per sq.cm. d. Sight glass with moisture indicator and removable type combination dryer cum filter

with MS housing and brass wire mesh / punched brass sheet shall be installed in liquid line of the refrigeration system incorporating a three valve by pass. After ninety days of operation, liquid line drier cartridges shall be replaced.

e. Heat exchanger shall be MS heavy duty pipe in pipe type and without any joint in the

inner pipe. f. Horizontal suction line shall be pitched towards the compressor and no reducers shall

be provided for proper oil return. g. After the refrigerant piping installation has been completed, the refrigerant piping

system shall be pressure tested using Freon mixed with nitrogen / carbondioxide at a pressure of 20 kg per sq. cm (high side) and 8 kg per sq. cm (low side). Pressure shall be maintained in the system for a minimum of 12 hours. The system shall then be evacuated to a minimum vacuum of 70 cm of mercury and held for 24 hours. Vacuum shall be checked with a vacuum gage.

h. All refrigeration piping shall be installed strictly as per the instructions and

recommendations of air conditioning equipment manufacturer.

17.0 PIPING INSTALLATION

a. Design Drawings indicate schematically the size and location of pipes. The Contractor, on award of the work, shall prepare detailed shop drawings, showing the cross-section, longitudinal sections, details of fittings, locations of isolating and control valves, drain and air valves, and all pipe supports. He must keep in view the specific openings in the building through which pipes are designed to pass.

b. Piping shall be properly supported on, or suspended from, stands, clamps, hangers as

specified and as required. The Contractor shall adequately design all the brackets,



saddles, anchors, clamps and hangers and be responsible for their structural sufficiency.

c. All pipes in HVAC plant room shall be supported with pipes and channels from floor

only with necessary PUF pipe supports and resistoflex sheet. d. Pipe supports shall be of steel, adjustable for height and primer coated with rust

preventive paint and finish coated black. Where pipe and clamps are of dissimilar materials, a gasket shall be provided in between. Spacing of pipe supports shall not exceed the following: _____________________________________________________________________ Pipe size Spacing between supports Rod Size ____________________________________________________________________ Upto 12 mm 1.5 Meter 8 mm 15 to 25 mm 2.0 meter 8 mm 30 to 150 mm 2.0 meter 8 mm Over 150 mm 2.5 meter 12.5 mm

d. Vertical pipes passing through floors shall be plumb and parallel to wall. Pipes shall be

supported on alternate floor. MS cleats shall be welded on pipes and rest on MS channel placed on the floor with 15 mm thick resistoflex pads between the cleat and channel. U clamps with resistoflex sheet shall be provided to keep the pipe in position.

e. Bull heading in water/refrigerant piping shall be avoided. f. Pipe sleeves at least 3 mm thick, 50 mm / 80 mm larger in diameter than condenser /

chilled water pipes respectively shall be provided wherever pipes pass through retaining wall and slab. Annular space shall be filled with fiberglass and finished with retainer rings welded on the ends of the sleeve.

g. Wherever pipes pass through the brick or masonry / slab openings, the gaps shall be

sealed with fire sealant such as fire barrier caulks. h. Insulated piping shall be supported in such a manner as not to put undue pressure on

the insulation. 20 gage metal sheet shall be provided between the insulation and the clamp, saddle or roller, extending atleast 15 cm on both sides of the clamp, saddles or roller.

j. All piping work shall be carried out in a workmen like manner, causing minimum

disturbance to the existing services, buildings and structure. The entire piping work shall be organized, in consultation with other agencies work, so that laying of pipes, supports, and pressure testing for each area shall be carried out in one stretch.

k. Cut-outs in the floor slabs for installing the various pipes are indicated in the

Drawings. Contractor shall carefully examine the cut-outs provided and clearly point out where the cutouts shown in the Drawings do not meet with the requirements.

l. The Contractor shall make sure that the clamps, brackets, clamp saddles and hangers

provided for pipe supports are adequate. Piping layout shall take due care for expansion and contraction in pipes and include expansion joints where required.



m. All pipes shall be accurately cut to the required size in accordance with relevant BIS Codes, edges bevelled and burrs removed before laying. Open ends of the piping shall be closed as the pipe is installed to avoid entrance of foreign matter. Where reducers are to be made in horizontal runs, eccentric reducers shall be used for the piping to drain freely. In other locations, concentric reducers may be used.

n. Flanged inspection pieces 1.5 meters long, with bolted flanges on both ends, shall be

provided no more than 30 meters centres, or where-ever shown in Approved-for-Construction shop drawings, to facilitate future cleaning of all welded pipes.

o. All buried pipes shall be cleaned and coated with zinc chromate primer and bitumen

paint, and placed on concrete blocks with PUF saddles dipped in bitumen at every 2 meters and wrapped with three layers of fibre glass tissue, each layer laid in bitumen.

p. Insulated buried pipes shall be cleaned, de-rusted, then coated with rust-resistant

primer and placed on concrete blocks with PUF saddles dipped in bitumen at every 2 meters. Insulation shall be applied as per the section “Insulation”, wrapped with GI wire and covered with polyethylene sheet. Two coats (each 6 mm thick) of cement plaster shall be applied over chicken wire mesh lath. Where indicated in Schedule of Quantities, buried insulated pipes shall be water-proofed using coat of Shalibond, or approved adhesive, over the plastered surface; wrapping one layer of fibre glass RP tissue and one layer of roofing tarfelt with sufficient overlaps, set and sealed with the adhesive, held in position by 16 gage G.I wire tied at 15 cm intervals.

18.0 FLANGES & UNION Flanges and unions shall be provided in each line preceding the connection to each

equipments which require maintenance. Flanges / unions will be treated as part of piping. 19.0 AIR VENTING : Air valve shall be provided at the summit of piping system for air venting. Globe valve of

same size as air valves shall be incorporated. The sizes of air valves shall be as specified hereunder. All such valves will be measured & paid. MAINS AIR VALVES Up to 100 mm 25 mm 101 to 300 mm 40 mm

20.0 Drains :

Pump room :

Drains shall be provided at all low points in the system. All the drain points of Pumps shall be collected and brought to a common header provided by other agency. Air venting valves shall also be connected to the nearest floor trap / drain through equal size GI pipe. AHU Rooms:

A floor trap drain point will be provided in each room. The tenderer shall extend the drain

pipe from AHU to the floor trap.



21.0 SOCKET FOR PRESSURE GAUGES Socket for Pressure gauges shall be provided at the following locations.

a) Supply side of Chillers and Condensers. b) Return side of Chillers and Condensers c) Suction and discharge sides of Chilled & condenser water pumps. d) Suction and discharge sides of AHUs. e) Pressure gauge shall be of bourdon type with stainless steel construction of 150 mm

dia and of appropriate range and be complete with brass valves (3/4” Dia.) and SS duly calibrated before installations.

22.0 SOCKETS FOR THERMOMETER Direct reading 255 mm long industrial thermometers shall be provided at the inlet and outlet

of all heat exchangers to read water entering and leaving temperature.

Thermometer shall be of stainless steel construction with dial of 150mm dia and range up to 50°C, with 0.5°C least count and shall be calibrated before installation.

The thermometers shall be installed in separate brass oil wells of 1/2” size with a stem of minimum 3/4th of pipe. Thermometers for insulated piping shall be installed in extended neck to avoid damage or deformation of the insulation.

23.0 INSULATION Chilled water piping, condensate drain piping etc. shall be insulated as per the specification

enumerated under the specification “Insulation”. 24.0 TESTING

a) Piping shall be flushed with water 2 times thoroughly before commencement of test. b) Piping shall be tested by hydrostatic test pressure at 2.5 times the maximum working

pressure for a period of 24 hours. However, minimum test pressure shall be 10 Kg/sq. cm. The defects in joints and leaks

observed during the test shall be rectified to the entire satisfaction of the Engineer-in-charge and piping shall again be subjected to pressure test. The testing of piping system shall be conducted in presence of Engineer –in-charge. No insulation shall be carried out till the satisfactory completion of pressure testing. The contractor shall furnish all the necessary equipment, tools, instruments and labour to perform the test, to re-water and clean space.

25.0 BALANCING After the completion of installation and testing of piping, all the piping system shall be

adjusted and balanced to deliver the water quantities as specified / as required /as directed. The instruments /equipment required to adjusting the balancing of water system shall be accurately calibrated before taking any measurement. Calibrated orifices and portable flow meters may be used to adjust and balance the water flow. The contractor shall furnish certificate/ balancing report to the Engineer-in-charge for evaluation and approval.



26.0 PAINTING a) After successful completion of installation, testing and insulation all exposed piping shall

be given two coats of approved synthetic enamel paint as per the colour coding requirements.

b) All the underground piping shall be given one coat of Zinc chromate and two coats of

black anti-corrosive paint or bituminous paint.



O) STANDARD SPECIFICATION OF CONTROLS AND INSTRUMENTS: 1.0 SCOPE

The scope of this section comprises the supply, erection, testing and commissioning of automatic controls and instruments conforming to these specifications and in accordance with the requirements of Drawings and Schedule of Quantities.

2.0 TYPE

All automatic controls shall be of approved equal, electric controls as described in the various sections of these specifications.

3.0 AUTOMATIC CONTROLS

Automatic controls required for various types of equipment/machines have been described in the various sections of these specifications. The individual safety controls and various automatic controls shall be installed within the equipment/machines by the manufacturers before shipment. However, the following automatic controls, if not already installed on the equipment/machines, may need to be installed at site by the Contractor, as per the Schedule of Quantities.

4.0 TWO WAY MODULATING VALVES

For Air Handling Units and Fan Coil Units shall be provided in chilled water line at each units as shown on the drawings and included in schedule of quantities. Each valve shall be actuated by a space thermostat. Constant space conditions shall be maintained by allowing all of the chilled water to either pass through the coil or to bypass the coil and mix-with the chilled water return. The valve shall revert to fully bypass position when fan is shut off. Valve shall have brass seat, self adjusting teflon cone packing and constant total flow through full plug travel. These shall be installed in chilled water line to act as three/ two-way control valves. The valve shall have min. travel time between fully open and closed position.

5.0 THERMOSTATS

Shall be electronic type with 3 point output for modulating 2 position reversible motor of Two way valve of AHU/FCU with sensing element located in the return air stream. The profile, mounting arrangements and exact location of the thermostats shall be as approved by the Engineer in charge. All thermostats shall be supplied with the standard mounting boxes, as recommended by the manufacturer. Electronic type thermostats for air-conditioning application for actuating the two way valve at each air handling unit.

6.0 INSTRUMENTS

Instruments required for different types of machines have been described in the various sections of these specifications and shown on the drawings. Following instruments shall be provided as per the schedule of quantities.



Thermometers shall be of approved make, mercury-in-glass type with cast brass scale in a steel casing. Thermometers shall be filled with red reading mercury. Thermometers shall be of the separable socket type and shall have extended neck, where required, for insulated pipes. The scale shall be 23 cm long. Thermometers shall be installed at chilled water supply and return at air handling units, supply and return at chillers and condensers. Range of scales shall be 30-120 F (0-50 ) for air conditioning applications. Pressure Gages shall be approved make, installed on suction and discharge sides of pumps, chilled water supply and return at air handling units, inlet and outlet at chillers, and condensers and as shown on the drawings and included in Schedule of Quantities. Suction side gauges at pumps shall be compound gauges of 150 mm dia.

7.0 AIR FLOW SWITCH:

Air Flow Switches shall be of sturdy and corrosion resistant construction, suitable for monitoring air flow in ducts, and supplied with mounting plate and gasket for duct mounting. Paddle shall be of stainless steel of size 50mm x 150mm minimum. Air flow switches shall be chosen to suit the velocities to be monitored. Performance of air flow switches shall not be affected when mounted on ducts handling air below ambient dew point temperature.

8.0 CALIBRATION AND TESTING:

All automatic controls and instruments shall be factory calibrate and provided with necessary instructions for site calibration and testing. Various items of the same type shall be completely interchangeable and their accuracy shall be guaranteed by the manufacturer. All automatic controls and instruments shall be tested at site for accuracy and reliability before commissioning the installation.



P) STANDARD SPECIFICATION OF EXPANSION TANKS & AIR SEPARATORS: 1.0 EXPANSION TANKS

Expansion tanks shall be have full acceptance factor and shall be ASME rated pre-charged bladder-type pressure vessels. The thank shall be designed to absorb the expansion forces of heating/cooling system water while maintaining proper system pressurization under varying operating conditions. The heavy duty bladder should contain system water thereby eliminating tank shall be provided with insulation.

2.0 MATERIALS OF CONSTRUCTION i. System Connection: Forged Steel ii. Shell: Carbon Steel iii. Bladder: Heavy Duty Butyl Rubber iv. Designed and Constructed per ASME section VIII, division 1

3.0 AIR SEPARATOR Furnish and install, as shown on plans, a centrifugal type air separator. The unit shall inlet and outlet connections tangential to the vessel shell. The unit shall have an internal stainless steel collector tube with 5/32” (4mm) diameter perforations and 63% open area designed to direct accumulated air to the compression tank on an air control system or an air vent on air elimination via an NTP vent connection at top of the unit. A blow down connection shall be provided to facilitate routine cleaning of the separator. Manufacturer to furnish data sheet specifying air collection efficiency and pressure drop at rated flow. Vessel shell diameter is to be three times the nominal inlet/outlet pipe diameter, with a minimum vessel volume for sufficient velocity reduction. The air separator must be designed, constructed and stamped for 125 paig@350°F (862 kPa @177°C) in accordance with section VIII, division I of the ASME Boiler and pressure vessel inspectors. The air separator(s) shall be painted with one shop coat of light gray air dry enamel. A manufacturer’s data report for pressure vessels, Form U-1 as required by the provisions of the ASME boiler and pressure vessel code, shall be furnished for each air separator upon request.



Q) STANDARD SPECIFICATION OF AIR CIRCULATION SYSTEM: SHEET METAL DUCT WORK 1.0 SCOPE

The scope of this section comprises supply fabrication, installation and testing of all sheet metal / aluminum ducts, supply, installation, testing and balancing of all grilles, registers and diffusers. All to be in accordance with these specifications and the general arrangement shown on the Drawings.

2.0 MATERIAL FOR DUCTING: All duct work shall be constructed out of best quality cold annealed, flat galvanized sheet

steel (galvanized to specifications of IS : 277 (latest edition). The grade of coat for GS sheet shall be 120 gm / sq m (table 2 of IS 277-1992).

The joints shall be finished straight and neat. The duct work shall be supported / secured from roof slab or any other building member using angles, rods as may be required.

Thickness of sheets shall be as shown in the tables given below :

Maximum size of

Rectangular Duct (in mm)

Round Duct dia (mm)

Thickness of GS Sheet in mm

Upto 750 Upto 600 0.63 (24 G)

751 to 1500 601 to 750 0.80 (22 G) 1501 to 2250 750 to 900 1.00 (20G) 2251 & above 901 & above 1.25 (18 G)

The fabrication of duct shall be done as per IS : 655 (latest edition). Transverse joints,

connections, bracing, seam etc. shall be as per IS : 655. All the ducts over 300 mm in either dimension shall be cross broken except those on which

rigid board insulation is applied. Stiffening angles shall be black structural steel and riveted to the duct work. The longitudinal

seam on all ducts may be Pittsburgh seam hooked and hammered. Ducts of size 600 mm and above shall be reinforced between the joints. Where drive-slips are

used, angles shall be riveted to the ducts 50mm from slips. 2.1 Duct Construction: The intent of the above specification is to obtain duct pieces that are robust and rigid; enough

to preclude flutter & to achieve minimum amount of air leakage. The contractor may fabricate ducts conforming to any other approved standard to achieve the desired result. Factory fabricated ducts also acceptable subject to meeting all other specifications. However, detailed specifications shall be submitted for approval before adopting the same. Suitable vapour seal type gaskets shall be provided between the duct flanges. Ducting shall be supported from independent hangers fixed to the building structure. In any case the duct shall not be supported from false ceiling, ceiling hangers, light fixtures, support for light fixtures or piping work etc. In case the structure is under construction, inserts and anchors



required for duct support shall be set in the building structure at the time of pouring concrete. The Contractor shall prepare detailed drawings of hangers and supports and submit for the approval of Engineer-in-charge. Anchoring of rods shall be done by using metallic expansion fasteners in ceiling for concrete roof. Where ducts are required to be lined or insulated on inner surface, their dimensions have to be enlarged so that cross-section area is not reduced as compared to those shown on the drawings by the contractor.

2.2 Elbows, Vanes etc. Simple elbows, transformation sections shall be formed with Pittsburg corner seams.

Complicated fittings shall be constructed with double corners. Elbows, bends and offset pieces shall have a center line radius of not less than 1.5 times the radial of width of the duct. Turning vanes should be provided at required spacing such that the aspect ratio of each individual elbow formed by vanes shall not be more.

2.3 Transformation: Duct transformation shall be made with a side slope of 10mm to 70mm. Gradual changes

shall be used so as to maintain uniform velocities accompanied by decreased turbulence, lower resistance & minimum noise.

2.4 Obstructions: Where ducting has to avoid building structural members, piping, electrical pipes and cables,

ducts shall be transformed, divided or curved to one side and a stream lined collar shall be used in all such cases (the reduction in area shall not exceed 20% of the original area) subject to approval of Engineer in charge. Factory fabricated ducts are also acceptable subject to meeting above specification.

2.5 Take offs: All branch take-offs and collars shall be provided with turning vanes. Straightening vanes shall

be provided in the collars wherever practicable. 2.6 Dampers & Splitters Dampers shall be provided in the duct work for proper control and balancing of air

distribution. Dampers shall have easily accessible operating mechanism. The operating mechanism shall consist of links, levers and quadrants as required for proper control and setting in a desired position. The position of the handle of Damper operating mechanism shall be clearly visible and it shall indicate the position of the damper in duct. Dampers, splitters and their operating mechanism shall be fabricated of GS sheets of two gauges heavier than duct piece having these fittings and shall be easily accessible through suitable access doors in the ducts.

Dampers shall be installed in duct at all required locations such as chutes, branches etc. 2.7 Fire Dampers: Fire dampers shall be provided in the ducting wherever required as per the local codes.

However, fire dampers shall be provided in the ducts passing through fire walls and where



the ducts serves more than two floors, fire dampers shall have same fire resistance as that of fire walls, ceiling etc. The fire damper shall be installed in the duct in such a manner that vibration and rattling does not occur due to the passage of air. All fire damper units shall be provided with motor operated switch for operating the damper as and when the fire signals are received from the fire panel. The scope of work includes laying of cable from corresponding fire panel to fire dampers and connection thereof. The item will be measured and paid as per schedule of quantities.

2.8 Apparatus and Equipment Connections Equipments such as air handling units shall be connected to the duct by means of double

canvas sleeve of 15 ounce, woven asbestos cloth connection of at least 150mm long. Duct sleeves made of 20 gauge thick galvanized sheet shall be used for ducts passing through

load bearing walls or partitions. Sleeves shall provide 25 mm clearance all around as per duct or insulated duct. The space between sleeve and duct shall be packed with twisted asbestos.

All the sheet metal plenums required to confine the flow of air through filters and fans, shall

be fabricated out of 18 gauge galvanized sheet steel, and suitably braced as required. Suitable access doors shall be provided for plenums.

2.9 Access Doors Hinged or bolted access doors shall be provided in ducting for fire dampers, plenums and any

apparatus requiring frequent servicing for inspection. Access doors shall be rigid and shall be provided with air tight rubber gaskets. Insulated ducts shall be provided with insulated doors.

2.10 Diffusers & Grilles All side wall supply grills shall be double deflection type with both horizontal and vertical

vanes being adjustable. Grilles shall be provided with multi-louver damper for volume control with adjustable handle. Side wall grille shall be similar to Tuttle & Bailey. All return air and exhaust grilles shall have only horizontal louvers. The supply air grills and return air grills shall be on same face and continuous .Supply air ceiling diffuser shall be provided with volume control dampers which can be operated from below.

All the diffusers and grilles shall be of powder coated aluminium. Diffusers and grilles shall

be provided with sponge rubber gasket between flanges and wall or ceiling. Samples of grills/ diffusers shall be approved by Engineer-in-charge before installation. The shade of Grills and Diffuser shall match the Building finish and got approved by Engineer –in-charge.

2.11 Installation The installation of ducting shall conform to standard practice of the trade. Suitable fire

resistant frame work for fixing of grilles and diffusers (if required) shall be provided by AC contractor and no separate payment will be made on this account.

The contractor shall upon the award of work prepare detailed shop drawings of ducting for

approval by Engineer-in-charge. The drawings shall indicate the exact route of ducting, ducting dimensions, details of splitters, vanes, dampers, fire dampers, heaters, filters etc. as specified and required. The drawings shall also incorporate cross section indicating beams, obstruction, piping, cables etc. The ducting shall be suitably designed to avoid all obstructions



and at the same time utilizing a minimum number of bends / transformations /divisions etc. Every duct layout drawing shall clearly indicate the location and spacing of supports and hangers.

Ducting over the false ceiling area shall be supported from the ceiling slab or from beams. In

no event, the ducting shall be supported from false ceiling hangers, cable trays / racks, pipe supports or be permitted to rest on the false ceiling. The tenderer shall take suitable precaution while designing the duct route so that the duct routing does not foul with beams /columns and of other equipments.

All the ducts shall be rigid and shall be adequately supported and braced wherever required

with Tees, angles or adequate size to prevent buckling vibration or breathing. The contractor should mention the total quantity of various sizes ducting sheet along with each floor drawing of duct layout.

2.12 Insulation Duct work shall be insulated as per specification given under insulation. 2.13 Testing After completion of ducting, the entire system shall be tested for air leakages. The maximum

allowable air leakage shall be 10%. On commissioning of the plant, the entire air distribution system shall be balanced to supply the required air quantities to various regions and rooms to maintain the specified inside conditions. The readings of air quantities after final balancing of the system through each diffuser or grill shall be recorded and submitted to the Engineer-in-Charge.

3.0 FACTORY FABRICATED DUCTS AS PER “SMACNA” STANDARDS 3.1 Scope

The scope of this section comprises supply fabrication, installation and testing of all sheet metal / aluminum ducts, supply, installation, testing and balancing of all grilles, registers and diffusers. All to be in accordance with these specifications and the general arrangement shown on the Drawings.

3.2 Raw Materials Galvanizing shall be Class VII – light coating of zinc, nominal 180gm/sq.m surface area and Lock

Forming Quality prime material along with mill test certificates. In addition, if deemed necessary, samples of raw material, selected at random by owner’s site representative shall be subject to approval and tested for thickness and zinc coating at contractor's expense.

3.3 Gauges, Bracing By Size Of Ducts

All ducts shall be fabricated from galvanized steel / aluminum of the following thickness, as indicated as below : For Ducts with external SP upto 250 Pa (25mmWg)



Rectangular Pressure 250 Pa

Duct Section Length 1.2 m (4 ft) Maximum Duct Size

Gauge Joint Type Bracing Spacing

1–750 mm 26 C & SS Nil

751 – 1000 mm 26 4 Bolt Transverse Duct Connector-E (TDC) with built in sealant

Nil

1001 – 1200 mm 24 4 Bolt TDC –E Nil 1201 – 1500 mm 24 4 Bolt TDC-H Nil 1501 – 1800 mm 22 4 Bolt TDC-H Nil 1801 – 2100 mm 20 4 Bolt TDC-J Zeebar

stiffener 1-S 2101 – 2700 mm 18 4 Bolt TDC-J Zeebar

stiffener 1-S

'C'-cleat; 'S'-S cleat; 'SS'-Standing S cleat; 'AI' -Angle Iron in mm *Distance of reinforcement/bracing from each joint. Bracing material to be same as of material used for joining of duct sections. For Round Ducts

Duct diameter mm

Upto 50 mm Wg static pressure (+ve)

51 – 250 mm Wg static pressure (+ve)

Upto 50 mm Wg static pressure (-ve)

Spiral seam gauge

Longitudinal seam gauge

Spiral seam gauge


Spiral seam gauge


Upto 650 26 24 24 22 24 22

651-900 24 22 22 20 22 20

901 – 1250 22 20 20 20 20 18

1251 – 1500 20 18 18 18 18 16

1501 – 2100 18 16 18 16 16 14

3.4 Fabrication Standards & Equipment All duct construction and installation shall be in accordance with SMACNA standards. In addition ducts shall be factory fabricated utilizing the following machines to provide the requisite quality of ducts. 1) Coil (Sheet metal in Roll Form) lines to facilitate location of longitudinal seams at

corners/folded edges only, for required duct rigidity and leakage free characteristics. No longitudinal seams permitted along any face side of the duct.



2) All ducts, transformation pieces and fittings to be made on CNC profile cutter for requisite accuracy of dimensions, location and dimensions of notches at the folding lines.

3) All edges to be machine treated using lockformers, flangers and rollers for turning up edges.

3.5 Duct Construction

All ducts shall be fabricated and installed in workmanlike manner, conforming to relevant SMACNA codes.

a) Ducts so identified on the Drawings shall be acoustically lined and insulated from outside

as described in the section “Insulation” and as indicated in schedule of Quantities. Duct dimensions shown on drawings, are overall sheet metal dimensions inclusive of the acoustic lining where required and indicated in Schedule of quantities. The fabricated duct dimensions should be as per approved drawings and care should be taken to ensure that all connecting sections are dimensionally matched to avoid any gaps.

b) Ducts shall be straight and smooth on the inside with longitudinal seams shall be airtight

and at corners only which shall be either Pittsburgh or snap button as per SMACNA practice, to ensure airtightness.

c) All ducts up to 75cms width within conditioned spaces shall have slip and drive (C & S/SS)

joints. The internal ends of slip joints shall be in the direction of airflow. Care should be taken to ensure that S/SS Cleats are mounted on the longer side of the duct and Cleats on the shorter side. Ducts and accessories within ceiling spaces, visible from air-conditioned areas shall be provided with two coats of mat black finish paint.

d) Changes in dimensions and shape of ducts shall be gradual (between 1:4 and 1:7). Air-

turns (vanes) shall be installed in all bends and duct collars designed to permit the air to make the turn without appreciable turbulence.

e) Ducts shall be fabricated as per details shown on Drawings. All ducts shall be rigid and

shall be adequately supported and braced where required with standing seams, tees, or angles, of ample size to keep the ducts true to shape and to prevent buckling, vibration or breathing.

f) All sheet metal connection, partitions and plenums, required to confine the flow of air to

and through the filters and fans, shall be constructed of 18 gauge GSS / 16gauge aluminum, thoroughly stiffened with 25mm x 25mm x 3mm galvanized steel angle braces and fitted with all necessary inspection doors as required, to give access to all parts of the apparatus. Access doors shall be not less than 45cm x 45cm in size.

g) Plenums shall be shop/factory fabricated panel type and assembled at site. Fixing of

galvanized angle flanges on duct pieces shall be with rivets heads inside i.e. towards GS sheet and riveting shall be done from outside.

h) Self adhesive Neoprene rubber / UV resistant PVC foam lining 5mm nominal thickness

instead of felt, shall be used between duct flanges and between duct supports in all ducting installation.



3.6 Installation Practice

All ducts shall be installed generally as per tender drawings, and in strict accordance with approved shop drawings to be prepared by the Contractor: a) The Contractor shall provide and neatly erect all sheet metal work as may be required to

carry out the intent of these Specifications and Drawings. The work shall meet with the approval of Owner’s site representative in all its parts and details

b) All necessary allowances and provisions shall be made by the Contractor for beams, pipes,

or other obstructions in the building, whether or not the same are shown on the drawings. Where necessary to avoid beams or other structural work, plumbing or other pipes, and conduits, the ducts shall be transformed, divided or curved to one side (the required area being maintained) all as per the site requirements.

c) If a duct cannot be run as shown on the drawings, the contractor shall install the duct

between the required points by any path available in accordance with other services and as per approval of owner’s site representative.

d) All ductwork shall be independently supported from building construction. All horizontal

ducts shall be rigidly and securely supported, in an approved manner, with trapeze hangers formed of galvanized steel rods and galvanized steel angle/channel or a pair of brackets, connected by galvanized steel rod under ducts. The spacing between supports should be not greater than 2.0 meter. All vertical ductwork shall be supported by structural members on each floor slab. Duct supports may be through galvanized steel insert plates left in slab at the time of slab casting. Galvanized steel cleat with a hole for passing the hanger rods shall be welded to the plates. Trapeze hanger formed of galvanized steel rods shall be hung through these cleats. Wherever use of metal insert plates is not feasible, duct support shall be through dash/anchor fastener driven into the concrete slab by electrically operated gun. Hanger rods shall then hang through the cleats or fully threaded galvanized rods can be screwed into the anchor fasteners.

e) Ducting over furred ceiling shall be supported from the slab above, or from beams after

obtaining approval of Owner’s site representative. In no case shall any duct be supported from false ceiling hangers or be permitted to rest on false ceiling. All metal work in dead or furred down spaces shall be erected in time to occasion no delay to other contractor’s work in the building.

f) Where ducts pass through brick or masonry openings, it shall be provided with 25mm thick

TF quality expanded polystyrene around the duct and totally covered with fire barrier mortar for complete sealing.

g) All ducts shall be totally free from vibration under all conditions of operation. Whenever

ductwork is connected to fans, air handling units or blower coil units that may cause vibration in the ducts, ducts shall be provided with a flexible connection, located at the unit discharge. Flexible connections shall be constructed of fire retarding flexible heavy canvas sleeve at least 10cm long securely bonded and bolted on both sides. Sleeve shall be made smooth and the connecting ductwork rigidly held by independent supports on both sides of the flexible connection. The flexible connection shall be suitable for pressure at the point of installation.



h) Duct shall not rest on false ceiling and shall be in level from bottom. Taper pieces shall taper from top.

4.0 DAMPERS:

All dampers shall be of Galvanised iron construction with louver dampers of robust construction and tightly fitted. The design, method of handling, and control shall be suitable for the location and service required. The damper shall be of opposed blade type. The sheet thickness of blade shall be 0.8 mm and of the frame shall be 1.0 mm.

Dampers shall be provided with suitable links, levers and quadrants as required for their proper operation; control or setting devices shall be made robust, easily operable and accessible through suitable access doors in the ducts. Every damper shall have an indicating device clearly showing the damper position at all times.

Dampers shall be placed in ducts and at every branch of supply air duct connections, whether or not indicated on the drawings, for the proper volume control and balancing of the system.

All the dampers at grille collars shall be of extruded aluminium construction with louver dampers of robust construction and tightly fitted

5.0 SUPPLY AIR DIFFUSERS:

Diffusers shall be of approved make and of Aluminium construction, square / rectangular in shape with flush fixed pattern or adjustable flow pattern. Diffusers for different spaces shall be selected in consultation with the Engineer-in-charge.

All supply air diffusers shall be equipped with removable key-operated volume control dampers. Anti-smudge ring may be required in specific applications. The outer shell and diffusing assembly shall be made out of powder coated drawn aluminium section respectively. Jet Diffusers: The jet diffusers shall be made out of drawn sections of aluminium. The diffuser shall have the air control arrangement and the adjustable angle for throw. The diffuser shall be complete with mounting ring, air tight gaskets and fixing arrangement. The jet diffuser shall generally be of circular shape.

6.0 OUTSIDE AIR LOUVERS:

Exhaust/Fresh air louvers of 80 mm thick high performance (55% free area) drainable fixed louver type powder coated Aluminium frame and blades. Mullions to be sliding interlock type with integral internal drain. Jamb and mullion drains to be open on front face in order to direct water away from inside of louver. Blades to be one piece extrusions with gutters design to catch and direct water to jumb and mullion drains. Fastners to be aluminium. Louvers to have framed 13 mm mesh removable mill finish aluminium bird screens.

7.0 TESTING AND BALANCING:

After completion of the installation of the complete air distribution system, all ducts shall be tested for air leaks. Before painting the interiors, air distribution system shall be allowed to run



continuously for 48 hours for driving away any dust or foreign material lodged within ducts during installation. The entire air distribution system shall be balanced using approved anemometer. Air quantities at the fan discharge and at various outlets shall be identical to, or less than 5 percent in excess of, those specified and quoted. Leakage in each air distribution system shall be within 3 percent so that supply air volume at each fan shall be identical to, or no greater than 3 percent in excess of, the total air quantity measured at all supply outlets served by the fan. Branch duct adjustments shall be made by volume or splitter dampers. Dampers shall be permanently marked after air balance is complete so that these can be restored to their correct position if disturbed at any time. Complete air balance report shall be submitted to the Engineer.-in-charge for scrutiny and approval, and six copies of the approved report shall be provided with completion documents.



R) STANDARD SPECIFICATION OF FIRE DAMPERS:

This section deals with supply, erection, testing and commissioning of electrically operated fire dampers and box type dampers, conforming to general specification and suitable for duty selected, indicated in schedule of equipment/material.

1.0 DAMPERS:

a) The fire dampers of at least one and a half hour rating shall be provided in all return air ducts at AHU room wall crossing.

b) The fire dampers shall be fabricated out of 1.6 mm galvanized sheet steel. These

dampers shall be multi leaf type. The damper blades shall be provided on both ends using chrome plated spindles in self lubricating bushes. The damper shall have spring type motorized actuators, control panels and temperature sensors. Stop seals shall be provided on top and bottom of the damper housing made of 16G GSS. For preventing smoke leakage side seals shall be provided.

c) In the normal position the blades of the dampers shall remain open to allow maximum air

to flow. The dampers shall be actuated using electrical means to block the air. This motor shall also be operated from the signals received from the fire control panel in case of any fire. Also an electrical inter connection is provided such that the AHU motor is tripped immediately a signal is received from Fire Alarm System for closing the damper.

d) All fire dampers shall be mounted in fire rated wall with a duct sleeve 400mm/500mm

long depending on the wall thickness. The sleeve shall be factory fitted on the fire damper. The joint at the sleeve end shall be slip on type. Minimum thickness of GI sheet used for sleeves shall be 18G.

2.0 HINGED ACCESS DOORS In all fire dampers, coil, heaters, plenums or any other equipment requiring regular servicing

and inspection shall be provided with hinged access doors or suitable size complete with air tight gaskets. In case of insulated ducts or plenums, the access door shall be insulated. All hinges, tower bolts, etc. shall be of anodized aluminum only.



S) STANDARD SPECIFICATION OF INSULATION: 1.0 SCOPE

The scope of this section comprises the supply and application of insulation conforming to these specifications.

2.0 MATERIAL

Thermal insulation material for Duct & Pipe insulation shall be closed cell Elastomeric Nitrile Rubber . The duct insulation shall have self adhesive backing with a peal-off cover for easy installation at site. Thermal conductivity of the insulation material shall not exceed 0.038 W/moK or 0.212 BTU / (Hr-ft2-oF/inch) at an average temperature of 30oC. Density of the nitrile rubber shall be 40-60 Kg/m3. The product shall have temperature range of –40 oC to 105oC. The insulation material shall be fire rated for Class 0 as per BS 476 Part 6 : 1989 for fire propagation test and for Class 1 as per BS 476 Part 7, 1987 for surface spread of flame test. Water vapour permeability shall be not less than 0.024 per inch (2.48 x 10-14 Kg/m.s.Pa i.e. µ>7000: Water vapour diffusion resistance). Thickness of the insulation shall be as specified for the individual application. Each lot of insulation material delivered at site shall be accompanied with manufacturer’s test certificate for thermal conductivity values, density, water vapour permeability and fire properties. Samples of insulation material from each lot delivered at site may be selected by Owner’s site representative and gotten tested for thermal conductivity and density at Contractor’s cost. Adhesive used for sealing the insulation shall be non-flammable, vapour proof adhensive strictly as per manufacturer’s recommendations.

. 3.0 DUCT ACOUSTIC LINING

Material shall be resin bonded fibre glass, 32 KG/cu. M density. Thickness of the material shall be as specified for the individual application.

Ducts so identified and marked on drawings and included in Schedule of Quantities shall be provided with acoustic lining of thermal insulation material for a distance of minimum 5 meters as follows:

The inside surface for the ducts shall be cleaned, and provided with 24 gauge GI Channels 25 x 25 mm screwed back to back and fixed on the inside of duct, spaced not more than 60 cm center to form a frame work of 60 x 60 cms square. Cut panels 60 x 60 cms of fiber 25 mm thick shall be fitted in the squares. The insulation panels shall be fired to the sheet metal with cold setting adhesive compound and covered with fibre glass tissue paper.

The inner most surface shall be covered with 26 gage perforated aluminium sheet having atleast 15 percent perforations. The aluminium sheet shall be screwed to GI channels using cup washer and neatly finished to give true inside surface.

4.0 DUCT INSULATION

With Nitrile Ruber external thermal insulation shall be provided as follows : The thickness of closed cell shall be as shown on drawing or identified in the schedule of quantity. Following procedure shall be adhered to:



Duct surfaces shall be cleaned to remove all grease, oil, dirt, etc. prior to carrying out insulation work. Measurement of surface dimensions shall be taken properly to cut closed cell elastomeric rubber sheets to size with sufficient allowance in dimension.

Material shall be fitted under compression and no stretching of material shall be permitted. A thin film of adhesive shall be applied on the back of the insulating material sheet and then on to the metal surface. When adhesive is tack dry, insulating material sheet shall be placed in position and pressed firmly to achieve a good bond. All longitudinal and transverse joints shall be sealed as per manufacturer recommendations. The adhesive shall be strictly as recommended by the manufacturer.

With fibre glass external thermal insulation shall be provided as follows :

Duct surfaces shall be cleaned, adhesive shall be applied on all sides and 25/50 mm thick resin bonded fiberglass, 32 KG/cu. M density insulation panels shall be wrapped before adhesive dries out. All longitudinal and transverse joints shall be sealed by covering with fiberglass tissue paper overlapped y minimum 100 mm to cover all joints. PVC straps at 400 mm centre shall be used to hold insulation in position. Cladding shall be provided with 28 gauge GI sheet cladding.

All longitudinal and transverse joints in outer cladding shall have minimum overlap of 50 mm duly beaded and grooved and shall be sealed with elastomeric metal sealant 95-44 of Benjamin Foster USA or equivalent. Self tapping screws/pop rivets spots shall be sealed with above sealant. The cladding shall be done in a neat & clean manner to give true surface.

5.0 PIPING INSULATION

All chilled water, refrigerant, and condensate drain piping shall be insulated in the manner specified herein. Before applying insulation, all pipe work and fittings shall be brushed and cleaned, and dust, dirt, mortar and oil removed. All MS pipes shall be provided with a coat of zinc chromate primer, followed by two coats of cold setting adhesive compound. Thermal insulation shall then be applied as follows : ------------------------------------------------------------------------------------------------------ Pipe size (mm) Thickness for expanded

Polystyrene (TFQuality)mm (24 Kg/m3) ------------------------------------------------------------------------------------------------------ 10 to 40 25 50 to 150 50 Above 150 75 ----------------------------------------------------------------------------------------------------

Premoulded pipe sections shall be placed over the pipes, the longitudinal and transversal joints of these pipe sections shall be sealed with the adhesive compound. The insulation shall be continuous over the entire run of piping, fittings and valves.

Insulation shall be applied only after the piping system has been satisfactorily tested for leaks at 2.5 times the working pressure or at minimum 10 kg/sq.cm. test pressure. All insulated pipes shall be covered with two layers of 400 gage polythene sheet to act as vapour barrier. PVC straps at 400 mm centre shall be used to hold insulation and vapour barrier together. Insulation shall be covered with 26 gauge aluminium sheet cladding as per Schedule of Quantities and



finished in neat and clean manner so as to achieve true surface. All longitudinal and transverse joints in the outer cladding shall have a minimum overlap of 50 mm duly beaded and grooved and shall be sealed with elastomeric metal sealant 95-44 of Benjamin Foster USA, or equivalent. Use of screws for fastening may puncture vapour barrier hence GI bands 0.50mm thick x 25 mm wide shall be provided at every 500 mm to retain cladding in position. Adhesive component once opened shall be used immediately and no leftovers shall be permitted to be used following day.

All insulation work shall be carried out by skilled workmen specially trained in this kind of work. All insulated clad pipes shall be labeled (S, R or RR) and provided with 300 mm wide band of paint along the circumference at every 1200 mm distance for color coding. Direction of fluid shall also be marked. Un-insulated M S pipes shall be painted throughout and direction of fluid marked. All painting shall be as per relevant BIS codes.

6.0 PUMP INSULATION

Chilled water pump shall be insulated to the same thickness as the pipe to which they are connected and application shall be same as above. Care shall be taken to apply insulation in a manner as to allow the dismantling of pumps without damaging the insulation.

7.0 SHELL INSULATION

The chiller shells shall be factory insulated in accordance with the manufacturer’s standards. 8.0 ACOUSTIC LINING OF AHU ROOMS AND SUPPLY AIR DUCT & PLENUM

Two walls and ceiling of air conditioning plant room and air handling unit rooms may be provided with acoustic lining of resin bonded fibreglass wool as per Schedule of Quantities and as shown on the Drawings. The surface shall be cleaned and frame work of 24 gage GI fabricated Channels 25 mm x 50 mm screwed back to back at 60 cm centres shall be provided vertically and horizontally so that 60 x 60 cm squares are formed. The gaps between frames shall be filled with 50 mm thick about 60 cm x 60 cm cut panels of resin bonded fibreglass slabs. The entire surface shall then be covered with fibreglass tissue and 26 gage perforated aluminium sheet, 60 cm or 120 cm wide having atleast 15 percent perforations, fixed with sheet metal screws. Over-lapping of sheets shall be covered with Aluminium beading. Acoustic lining of walls shall be terminated approximately 15 cm above the finished floor to prevent damage to insulation due to accidental water-logging in plant/AHU rooms.

9.0 Method of Application

a) Clean RCC slab and make it free from dust and other laitance matter.

b) Lay cement based water proofing on roof with a minimum slope of 1:80 and average thickness of 18 mm using brickbats of appropriate size and shape suitable to achieve the required slope laid over 15 mm thick waterproof c3ement mortar 1:4 and finished with 20 mm thick waterproof plaster wing cement mortar 1:4 and making false squares of 300 mm size including rounding off the junction of roof and parapet walls for a height of 300 mm with brickbats and 20 mm thick waterproof plaster and conducting necessary leakage / dampers tests, etc.



c) Lay 65 mm thick extruded polystyrene boards over prepared surface fixing with adhesive. Adhesive shall be strictly as per recommendations from manufacturer.

d) Lay 80 gsm geotextile fabric over insulation board

e) Lay 40 x 40 x 4 cm precast paver blocks.

Note : If contractor is awarded work of waterproofing + overdeck insulation, follow all steps from (a) to (e). if contractor is awarded work of only overdeck insulation follow step (c) and (d). Rest will be done by Civil Contractor).

10.0 UNDERDECK INSULATION

Underdeck insulation shall be 50mm thick TF Quality expanded polystyrene (32 Kg/m3) or 30mm thick phenotherm. Underdeck surface of ceiling shall be cleaned and made dirt free. Insulation panels shall be pasted on this surface with black CPRX compound. 28g wire net shall be tightened around insulation so as to avoid any kind of sagging. Ends of net shall be overlapping by at least 25mm. Overlaps shall be screwed with galvanised screws to avoid rusting.

11.0 EQUIPMENTS: All equipments such as AHUs, Fan coil units, water chiller equipments shall be suitably

insulated as required and as per manufacturer’s requirements. The cost of such insulation is deemed to be included in the cost of equipments. The insulation shall be applied after applying of necessary primer, factory applied insulation of chiller is also acceptable.



T) STANDARD SPECIFICATION OF FANS:

1.0 GENERAL

1.1 Fans shall be of the type, size, arrangement and capacity as indicated in the schedule and/or as shown on the drawings.

1.2 Unless specified, fan performance rating data shall be tested accordance with AMCA Standard 210-85(Air Moving and Conditioning Association), ANSI/ASHRAE Standard 51-1985 “Laboratory Methods of Testing Fans for Rating”. Sound ratings shall conform to AMCA Standard 300-85, “Reverberant Room Method for Sound Testing of Fans”.

1.3 A computer printout of fan performance rating corresponding to the AMCA licensed data, with corrected ratings for altitude and temperature, fan operating speed, bearing life, etc. shall be submitted for approval.

1.4 All fans shall be dynamically trim-balanced to ISO1940 and AMCA 204/3 - G2.5 quality grade after assembly. A computer printout with the vibration spectrum analysis shall be attached to the fans.

1.5 Fan motors shall comply in all respects with continuous rating in accordance with IEC34 or equivalent. Motor bearings shall be of ball or roller type, grease or lubricant sealed for life. Fan and drive shall be earthed to prevent accumulation of static charge.

1.6 Kitchen exhaust fan shall be of Bifurcated Axial or SISW Centrifugal direct or belt driven type. DIDW Centrifugal and Direct Drive Axial Flow Fan where belts or motor are in the air stream are not acceptable.

1.7 Fans shall be installed at staircase or lobby where fresh air intake is free from any obstruction and shall be energized only by fire alarm system. Fan shall be of Axial Flow Fan or DIDW Centrifugal Fan. Protective grille at the suction of the fan is required.

1.8 Fans for elevated temperature (Smoke Extraction Fans) with components rated for high temperature (250C, 2Hrs) service, with belt drive assemblies exposed to the air stream are not acceptable.

1.9 For Smoke Extraction Fans where motor is in the air stream with electrical/electronic temperature limit switch for motor protecting shall not be used.

1.10 Fan should be of G.S.S. , the Steel sheet should be JFE Galvazinc (Base metal cold rolled), JIS G3302, SGCC with Z22 (minimum coating weight on both sides @ 220 g/m2) zinc coating & Zero Spangle, skinpassed, chromated and dry.

1.11 If fan is open to atmosphere, Fans shall be with Pure polyester powder coating for minimum thickness of 60 microns.

2.0 AXIAL FLOW FANS (DIRECT DRIVE)

2.1 Fans shall be licensed to bear the AMCA Seal. The test standard used shall be ANSI/AMCA 210-85, ANSI/ASHRAE Standard 51-1985 “Laboratory Method of Testing Fans for Rating” and AMCA 300 “Reverberant Room Method for Sound Testing of fans”.

2.2 To achieve the minimum and equal clearance between the blade tips and casing, tube casing shall maintain its roundness by means of using one piece of sheet metal with 90 edge flanging up.

2.3 Fan motor base support shall be properly secured (locked and sealed) to the fan housing and be of adjustable type to have precise control of motor shaft central position as well as running



clearance between blade tips and casing. Motor (KW/HP) shall be able to be changed or upgraded at site without changing fan housing or ducting construction.

2.4 Fans supplied shall be complete with factory fabricated mounting bracket (ceiling or foot mounted) and suction/discharge matching flanges as accessories.

2.5 All hubs shall be cast Aluminum alloy (Grade LM2) unless for Smoke Extractor Fans where high temperature (250C/2Hrs) air is expected then Aluminum alloy or steel fan impeller blades are required. Otherwise impeller blade material with Polypropylene (PP), Glass-reinforced Polypropylene (PPG) and Glass-reinforced Polyamid (PAG), to provide self-balancing, anti-static, anti-sparking characteristic is preferable.

2.6 Running clearance between blade tips and casing shall not exceed 1% of the impeller diameter, and 2% for smoke spill high temperature fan where mechanical expansion coefficient is different from normal ambient temperature. Fan manufacturer shall provide the fan assembled with the dame clearance between blade tips and casing of the tested prototype. Note that the air performance and pressure loss are greatly affected by this clearance.

2.7 Impellers shall be secured to the drive shaft by a key and keyway. Axial location shall be provided by a collar or shoulder on the drive shaft together with a retaining washer and screw fitted into a tapped hole at the end of the shaft and locked in position. Blades shall be secured in place to the angle setting by setscrews, locking nuts or setting pins.

2.8 Fan motor shall be totally enclosed and external terminal box of at least IP55 shall be provided.

2.9 Fan RPM shall be as per BOQ.

2.10 All fans after assembly shall be dynamically trim-balanced to ISO1940 and AMCA 204/3 - G2.5 quality grade. A computer printout with vibration spectrum analysis shall be attached to the fans.


3.0 VANE AXIAL FLOW FANS (DIRECT DRIVE)

3.1 Fan shall be licensed to bear AMCA seal.

To achieve the minimum and equal clearance between the blade tips and casing, tube casing shall maintain its roundness by means of using one piece of sheet metal with 90 edges flanging up with Fixed Guide Vanes.

3.2 Fan Casing should be provided with Special Designed Integral Straightening Vanes to reduced turbulence provide high performance & low noise level.

3.3 Fan motor base support shall be properly secured (locked and sealed) to the fan housing and be of adjustable type to have precise control of motor shaft central position as well as running clearance between blade tips and casing. Motor (KW/HP) shall be able to be changed or upgraded at site without changing fan housing or ducting construction.

3.4 Fans supplied shall be complete with factory fabricated mounting bracket (ceiling or foot mounted) and suction/discharge matching flanges as accessories.

3.5 All hubs shall be cast Aluminum alloy (Grade LM2) unless for Smoke Extractor Fans where high temperature (250C/2Hrs) air is expected then Aluminum alloy or steel fan impeller blades are required. Otherwise impeller blade material with Polypropylene (PP), Glass-reinforced



Polypropylene (PPG) and Glass-reinforced Polyamide (PAG), to provide self-balancing, anti-static, anti-sparking characteristic is preferable.

3.6 Impellers shall be secured to the drive shaft by a key and keyway. Axial location shall be provided by a collar or shoulder on the drive shaft together with a retaining washer and screw fitted into a tapped hole at the end of the shaft and locked in position. Blades shall be secured in place to the angle setting by setscrews, locking nuts or setting pins.

3.7 Fans shall not exceed 1500 RPM.

3.8 All fans after assembly shall be dynamically trim-balanced to ISO1940 and AMCA 204/3 - G2.5 quality grade. A computer printout with vibration spectrum analysis shall be attached to the fans.

The Fan should be AMCA Certified for Air Performance.


4.0 SMOKE EXTRACTION FAN

4.1 Smoke and heat exhaust fans are required to be in compliance with the'BSEN12101-3:2002'. This requires the fan to be subjected to a rated temperature of 250C for a rated duration of 120 minutes.

4.2 The Type test report is to be submitted by fan manufacturer & same clearly indicate the make of motor used during the testing and the same make/model of motor should be supplied by the fan manufacture at the site

4.3 The fan is required to satisfy the performance criteria specified in 'BSEN12101-3:2002'relating to structural performance, electrical performance and aerodynamic performance throughout the rated duration.

4.4 The testing certificate or test report shall be issued by Warrington Fire Research Centre Ltd in U.K., PSB Singapore or approval equivalent test laboratory.

4.5 For two-stage counter-rotating Smoke Spill Fan for high-pressure

4.6 application, each impeller shall be driven by a separate motor within a separate casing.

4.7 Fan should be of G.S.S., the Steel sheet should be JFE Galvazinc (Base metal cold rolled), JIS G3302, SGCC with Z22 (minimum coating weight on both sides @ 220 g/m2) zinc coating & Zero Spangle, skinpassed, chromated and dry.

5.0 PROPELLER FAN

5.1 Fans shall be of the ring-mounted type and the blades constructed from heavy gauge metal. An aerodynamically designed bell mouth constructed from heavy gauge metal shall be provided. The fan speed shall not exceed 1400RPM at 50Hz operation.

5.2 Propeller fans shall be direct driven type, the motor either a single-phase capacitor start-run or a three-phase squirrel cage induction type. The motor shall have inbuilt inherent protection against overloading. Motor with shaded pole or centrifugal switch type is not acceptable.

5.3 Bearings shall be maintenance free permanently lubricated type. Fans shall be complete with wire guards. External grilles, fan chambers and volume control damper shall be provided where indicated in the specification drawings.



6.0 CENTRIFUGAL FANS

6.1 Fans, Aerofoil, forward or backward curved, SISW or DIDW, shall be licensed to bear the AMCA Air and Sound Certified Ratings Seal. The test standard used shall be ANSI/AMCA 210-85, ANSI/ASHRAE Standard 51-1985 “Laboratory Method of Testing Fans for Rating” and AMCA 300 “Reverberant Room Method for Sound Testing of fans”.

6.2 All fans shall be dynamically trim-balanced to ISO1940 and AMCA 204/3 - G2.5 quality grade after assembly. A computer printout with vibration spectrum analysis shall be attached to the fans.


6.4 Fans housing shall be of an appropriate thickness to prevent vibration and drumming. The fan scroll shall be attached to the side plate by means of continuous lock seam or intermittent spot welding. The wheel and inlet cone shall be aerodynamically designed and constructed to provide maximum performance and efficiency as published by the manufacturer.

6.5 Fans must be physically capable of operating safely at every point of rating at or below the “minimum performance” limit for that class as defined in AMCA standard 99-2408-69 “Performance Class of Operating Limits for Centrifugal Fans”.

6.6 Shafts sizes shall be carefully calculated and designed such that the maximum operating speed (RPM) shall not exceed 75% of the first critical speed. For any application that is not a standard product from catalogue of the fan manufacturer detailed calculation of critical speed characteristic shall be submitted for approval.

6.7 Shafts shall be made of carbon steel (C45) machined and polished to tolerance of standard ISO 286-2 - grade g6. Protective coat of anti-rusting shall be applied to all bare surfaces of the shafts at the factory.

6.8 Bearings shall be of self-alignment (concentric) type with adaptor sleeve bearing. Bearings of eccentric locking collar with grub screw type are not acceptable. Bearing shall be maintenance free with permanently lubricated sealed ball bearing type. Bearing life shall be at least 75,000 hours based on basic rating life, L10 of ISO 281 standard. Calculation sheet of Bearing Life shall be submitted for approval.

6.9 Motor installed shall be of a minimum 130% of the fan power absorbed (Brake horsepower) and shall have sufficient torque available for starting and continuous operation.

6.10 Belts and pulleys shall be sized for a minimum 150% of the installed motor horsepower. The belt speed shall not exceed 30m/s. The pulley shall be of Taper Lock SPZ, SPA, SPB or SPC type. Conventional type of pulley is not acceptable. Both fan and motor pulley shall be balanced to the quality grade G.2.5.

6.11 Fan outlet velocity shall not exceed 10% of the main duct air velocity designed (0.1” per 100 ft or 1 Pascal per meter duct length). Pressure Loss is as referred to in SMACNA Standard, unless otherwise specified.

6.12 Computer printout on fan performance rating corresponding to the AMCA licensed data, with corrected rating for altitude and temperature, fan operating speed, bearing life, etc. shall be submitted for approval.

6.13 For Air washer Application, fans should have to coat of Pure polyester powder coating. Fans should have Inspection door & Drain plug.



7.0 IN-LINE CENTRIFUGAL DUCT FAN

7.1 Fan shall be of SISW / DIDW, forward or backward curved centrifugal, direct driven type.

7.2 Casing shall be of Galvanized steel with Oven-baked Pure polyester powder coating. Impeller material shall be either Galvanized Steel or Glass Reinforced Polypropylene.

7.4 Motor shall be external power supply 220~240V/50Hz/Single Phase.




U) STANDARD SPECIFICATION OF AIR WASHER: 1.0 SCOPE

The scope of this section comprises the supply, erection, testing and commissioning of air washer conforming to these specifications and in accordance with the requirement of drawings and schedule of quantities.

2.0 TYPE

The air washers shall be fill type or spray type as indicated on drawings and identified in Schedule of Quantities.

3.0 CAPACITY

The capacity of air washer shall be as shown on drawings and Schedule of Quantities. 4.0 FILL TYPE AIR WASHER

The air washer shall be draw through type with minimum 90% saturation efficiency with imported cellulose paper pads. The air washer shall be selected & designed for lowering inside temperature by 5 – 10 OC dependent on ambient conditions.

5.0 HOUSING

Double skinned panels shall be 23 mm thick made of galvanized steel, pressure injected with foam insulation (density 40 Kg / m3) with K factor not exceeding 0.02 watt / Mc shall be fixed to 1.5 mm thick aluminium alloy twin box section structural framework with stainless steel screws. Outer sheet of panels shall be made of galvanized preplasticised sheet of 0.8 mm thick, and inner sheet of 0.8mm thick plain GI sheet. The entire framework shall be mounted on an aluminium alloy or galvanized steel (depending on size) channel base as per manufacturer’s recommendation. The panels shall be sealed to the frame work by heavy duty ‘O’ rings gaskets held captive in the framed extrusion. All panels shall be detachable or hinged. Hinges shall be made of die cast aluminium with stainlees steel pivots, handles shall be made of hard nylon and be operational from both inside and outside of the unit. Units supplied with various sections shall be suitable for on site assembly with continuous foam gasket. All fixing and gaskets shall be concealed. Units shall have hinged, quick opening access door in the fan section and also in filter section where filters are not accessible from outside. Access doors shall be double skin type. Recirculation tank hall be fabricated from 18 gage stainless steel sheet with all corners welded. The tank shall be complete with double brass strainers, makes-up connection with float, drain and overflow connections.

6.0 FAN

The blower section shall be constructed out of 16 G GI sheet in folded construction and shall include Centrifugal Forward Curved DIDW fan wheel of totally GI Construction with Inlet Cones and shall be 5complete with individual motor and drive and shall be mounted on C Channel frame and Cushy Foot or Spring Mounts. Each Air-washer system shall comprise of one / two



nos. fans to handle air quantities as stipulated in BOQ. Each fan shall be driven by suitable HP TEFC motor. The fan wheel will be of the multiblade type and mounted on two self-aligning pillow block bearings of the requisite size. The fan shall be run with the help of “V” Groove drives as per the recommendation the drive supplier. The blower housing will of the Pittsburgh joint construction and the drive will be provided by a motor of adequate capacity. The motor plate will be constructed out of 12 G MS or heavier metal with slotted holes, which permit belt adjustment in both the directions.

7.0 FILL

Fill shall be of imported cellulose paper pads and of cross fluted configuration assembled in selfsupporting pads in a light weight construction. The pads shall be able to redistribute the water and shall be impregnated with insoluble antirot salts, rigidifying saturants and wetting agents with built in eliminators. The velocity across the fill shall not exceed 350 fpm (1.8 m/s) and shall not allow carry over of water. Minimum thickness of fill shall be 200 mm and minimum efficiency of pads 90%.

8.0 WATER DISTRIBUTOR

A FRP distributor shall evenly distribute water on the fill. 9.0 FILTERS

Filters section shall incorporate synthetic washable filtes of at least 50 mm thickness in suitable aluminium frame. Velocity of air across the filters shall not exceed 500 FPM.

10.0 ELIMINATOR

Eliminator plates shall be four bend made from 24 gauge galvanized sheet steel or PVC.

11.0 INTERCONNECTING PIPES

Air washer shall be complete with interconnecting GI piping from pumps to air washer, valves, gauges, fittings, strainers etc.

12.0 PUMPS

Specification for recirculation pumps shall be as listed in earlier section of the tender.

13.0 PAINTING

Shop coats of paint that have become marred during shipment or erection shall be cleaned off with mineral spirits, wire brushed and spot primed over the affected areas, than coated with paint to match the finish over the adjoining shop painted surface.

14.0 TESTING

Efficiency of air washer shall be computed from the measurements of air flow and dry and wet bulb temperature of air entering and leaving the air washer and ambient temperatures.



V) STANDARD SPECIFICATION OF SCRUBBER: 1.0 GENERAL:

The kitchen Scrubber will be self-contained and will consist of the following component parts listed in the following paragraph. The entire unit shall be WEATHERPROOFED and CORROSION PROTECTED as herein after specified. The unit shall be factory fabricated and will include.

2.0 BLOWER SECTION: The blower section shall be constructed out of 16G GI sheet in folded construction and shall

include Centrifugal forward curved DIDW fan wheel of totally GI construction with inlet cones and shall be complete with individual motor and drive and shall be mounted C Channel frame and Cushy Foot or Spring Mounts. The fan shall have a capacity not less than the one specified in the catalogues and shall be constructed and rated based on delivery against the rated static pressure with the media and filters in place. The fan will be of riveted construction and made with GI sheet of required thickness. The fan wheel will be of the multiblade type and mounted on two self-aligning pillow block bearings of the requisite size. The fan shall be run with the help of '‘'’groove drives as per the recommendation of the drive supplier. The blower housing will of the Pittsburg joint construction and the drive will be provided by a motor of adequate capacity. The motor plate will be constructed out of 12G MS or heavier metal with slotted holes, which permit belt adjustment in both the direction. The outlet velocity of the blowers will be kept low.

3.0 EVAPORATIVE/SCRUBBER SECTION: The wet section will have 16G GI tank and body with folded construction with the bolted

openable sides also in 18G SS sheet/FRP. The wet section will contain 50 mm thick rigid media to act as the first stage of scrubber to be sprayed by water through WIDE ANGLE NOZZLES to wet, scrub and clean the media installed at the inlet. These nozzles will be provided on a pipe grid such that the total face of the first bank of rigid media is kept fully wet and also gets pressure cleaning.

The wet section will have a also have another subsequent layer of 150 mm thick RIGID MEDIA

which will act as the cleaning media for the smoke and smell, these media banks will be designed @ 2.5 m/s to give 90% adiabatic efficiency. For the second bank 2 mm thick FRP specially fabricated header will be provided for the water distribution using perforated PVC piping 15 mm brass bleed off cock alongwith 20 mm heavy duty brass float. PVC drain/overflow and bleed off outlet are to be provided on all wet sections.

4.0 FILTER SECTION: All wet sections will include 5 layer 30 micron aluminium wiremesh filters of 50 mm thickness

including the mounting channels in SS 304 16G GI for ease of removal and renewal of filter cells. The filters to be designed at 2.5 m/s to give 90% efficiency down to 30 microns.

5.0 PUMPS The unit will have a horizontal single phase 220 Volts + 6% 50 c/s single phase power supply

monoblock self priming pump assembly to provide recirculated tank water and a pressurized flow via a piping system for proper pad and media water distribution. The pump capacity will be such that it can take care of the bank of nozzles provided for cleaning the first bank and also feed water to wet the second bank.



W) PAINTING WORK:

All equipment shall be painted as specified under respective headings. Grilles/ diffusers shall be powder coated as per approved colour matching with interiors. The contractor has to get approval of the quality and colour of paints for all types of painting work.

All pipes for chilled water shall be painted as per standard code of practice and arrows indicating direction of flow of water shall be marked.

Colour scheme for the plant and equipment i. Colour scheme for equipment like chilling unit, pumps, AHUs etc shall be as per

manufacturer's standard colour scheme, ii. The scheme of colour code painting of pipe work services for air conditioning installation

shall be as per National building code and is indicated below:

Description Ground colour Lettering colour

First colour band

Chilled water piping Sea Green Black Black Central heating piping Below 60 deg C

Sea Green Black Canary Yeliow

Central heating piping 60 deg C to 100 deg C

Sea Green Black Dark Violet

Drain pipe Black White Vents White Black Valves and pipe line fittings White with black

handles Black

Belt guard Black & Yellow diagonal strips

Machine Bases, Inertia Bases and Plinth

Charcoal Grey

Steel Support Black

Pump sets Battle Ship

Direction of flow of water White

Electrical Panel/Sub Panel/ Remore Control Console

Light grey or any

Cable Trays & Duct Support Black

iii. Colour bands shall be 150mm wide, superimposed on ground colour to distinguish type and condition of fluids. The spacing of band shall not exceed 4.0m.

In addition to the colour bands specified above all pipe work shall be legibly marked with black or white letters to indicate the type of service and the direction of flow identified as follows:-



X) MODE OF MEASUREMENT:

The following measurement code shall apply to this contract:-

i. Ducting

All sheet metal ducting work shall be measured in terms of final sheet area installed in Sq. m. Eg:- Measurement of 600 mm x 300 mm duct of 1 m length = [(600+300)x2x1] = 1.80 Sq.m. Duct fittings such as bends, elbows, tap-offs, collars, transformation pieces etc. shall be treated as ordinary duct pieces with their length measured along their centre line as mentioned in point (i). Vanes, splitters, duct dampers, deflectors, access doors, etc. which are required to be installed in the duct work shall not be measured separately as it shall form part of the duct work. Duct supports, stiffening members, etc. shall not be measured separately. All such supports/hangers shall form part of duct work. Equipment connections such as canvas/asbestos/rexine shall be deemed to be part of the duct work, and no separate measurement shall be allowed. No separate special measurement shall be made for bends, transformation pieces, tap offset, elbows, etc. Fire dampers - shall be measured by their cross sectional area perpendicular to the direction of air flow. Quoted rates shall include the necessary collars and flanges for mounting, inspection pieces with access door, electrical actuators and panel. No special allowance shall be payable for extension of cross section outside the air stream. Control panel for Fire/Smoke dampers shall be measured by numbers which shall include FRLS cable for interconnection of control panel, actuator & AHU panel. No additional payment on account of FRLS cable shall be made.

ii. Grilles: All grills will be measured in terms of effective area in Sq.m. iii. Diffusers: Diffusers will be measured in terms of effective area in Sq.m. iv. Ducting Insulation Ducting insulation will be measured on the basis of centerline of insulation and not the outer

line of insulation.

i) Eg:- Measurement of 25mm thick insulation on 600 mmx300mm duct of 1m length = [(600+25)+(300+25)]x2x1] =1.9 Sq.m

a) No separate special measurement shall be made for insulation of bends, transformation

pieces, tap offs, elbows, etc. All such insulation shall be treated as standard duct insulation.



b) Insulation item shall include all accessories and finishes as specified. No separate

measurement will be made for such items. v. Piping with/without insulation

a) Piping with insulation shall be measured in running length (meters) for each size of pipe. ii) The length of piping including accessories and fittings shall be measured along the center

line of piping. iii) No separate measurement of flanges, bends, elbows, reducer, expanders, tees, cross pipe

supports, hangers, anchors, sockets for thermometer, pressure gauge, etc. shall be made. All such fittings / accessories shall be treated as normal piping.

d) All accessories and finishes connected with insulation work shall be deemed to form part of insulation, and no separate measurement shall be made for such items.

vi. Pipe fitting, valves, etc.

i) No separate measurement of insulation shall be made for valves, fittings such as bends,

elbows, reducers, expanders, tees, crosses, flanges, etc. All such insulation shall be linear in metres measured along the center line of piping.

1. All accessories and finishes connected with insulation work shall be deemed to form part of insulation, and no separate measurement will be made for such items.

2. No separate measurement of insulation on valves will be made. vii. Equipment Insulation: No separate measurement for insulation of any equipment shall be made. Insulation of

equipment shall be deemed to form part of the equipment. Insulation on equipment shall be done as per spec. provided.

viii. Mode of Measurement of Electrical Items The Works shall be measured, as prescribed in the specification of work, notwithstanding any

general or local custom, except where otherwise specifically described or prescribed in the Contract. Wherever not specifically mentioned in the Contract, the mode of measurement as prescribed in the relevant IS codes shall be applicable and binding to the Contract. Only the latest editions of all the codes of practices including all latest official amendments and revisions shall be applicable.



Y) INCLUDED ITEMS OF WORK: The following items are under the scope of work of the Contractor without any

extra cost. IIT will not reimburse any amount, fee, payments, etc. in connection with the same to the contractor.

1. Foundations

Installation of all equipment including construction of machinery foundations, positioning of foundation bolts, grouting, etc.. The contractor has to furnish detailed specifications of foundations and drawings and the same has to be got approved before proceeding for foundation erection work. Foundation shall be of RCC 1:1 1/2:3 grade.

2. Approvals To obtain necessary statutory approvals from all Govt. local bodies, agencies, etc., if required. The fee and incidental charges for the same shall be borne by the contractor. No such payments will be reimbursed by IIT.

3. Painting All exposed metal work furnished under these specifications, except as otherwise specified shall be painted after installation. Painting shall be with 2 or more coats of Synthetic enamel of approved brand over a coat of zinc chromate yellow primer. All exposed chilled water lines should be painted with the approved colour. Chilled water lines should be painted with two coats of cement paint of approved make and colour.

4. Safety of Material The contractor shall provide proper and adequate storage facilities to protect all the materials and equipment against damage from any cause whatsoever. The watch & ward of the stores, equipment & materials shall be the responsibility of the contractor till the completion, commissioning & handing over to IIT.

5. Training to staff Necessary familiarization shall be given to IIT operating staff for a minimum period of one month to operate the air-conditioning system.

6. IIT reserves the right to inspect the materials at factory /site. If inspection of equipment at the factory is to be done, intimation should be given in advance. All arrangements for conducting the inspection/ testing at the factory/ site shall be the responsibility of the contractor.

7. Supply of wooden/ GI frames for fixing the grilles/ diffusers to the false ceiling as per requirement.

8. Openings of walls, slabs, trenches, etc. and making them good thereof to original finish.

9. Providing all consumables and hardware such as welding electrodes, sealing compounds, bolts, nuts, washers, gasket material, cement, bricks, graded stone, etc.

10. Supply of skilled and unskilled manpower, experienced supervisory and technical staff and competent management for execution.

11. Providing required temporary support, temporary protection, scaffolding and similar items.



12. Repair/rectification of any damaged components, equipment, materials, etc.

13. Removal of debris from the site to a location identified by Project Managers.

14. The excavation includes providing necessary openings in the built-in trenches and walls and making them good thereof. The depth of excavation shall be suitably adjusted to suit the site condition like crossing of existing electrical cables, water pipes, etc.

15. The contractor shall take away the balance of any materials left at the site after commissioning of the system. The cost, if already paid, for such items shall be deducted from the subsequent running bills. IIT shall not be liable to pay for any of the incidental charges connected with the above.

16. The contract agreement shall be executed on a non-judicial stamp paper of value not less than Rs.50/-, and the cost of the stamp paper shall be borne by the contractor.

17. All materials, tools and tackles, equipment, labour skilled and semi-skilled including their housing, sanitation, procurement of food stuff, medical aid etc. are to be arranged by the contractor. Cost of Transportation of labour and materials shall be borne by the contractor.

18. The contractor shall be responsible for any damage resulting from his negligence to existing facilities /installations and will restore, replace or repair any such damages at his cost to the complete satisfaction of IIT.

19. The tenderer has to select the equipment meeting the general/ technical specifications mentioned in the tender.

20. The drawings enclosed are for reference only. The tenderer has to check the exact requirement suitable to the site conditions.

21. The tenderer has to return the original tender document duly signed and stamped in all pages.

22. IIT shall not be responsible for any postal delay in respect of receipt of tender document, etc. It is the responsibility of the tenderer to make sure that the tender is received in time.

23. The contractor shall furnish and install in the machine room a duly typed set of operating instructions securely framed and shall also supply one set of tools free of cost required for routine and special maintenance work.

24. Catalogue /brochure/ technical information with drawings of all equipment/machinery /item shall also be enclosed along with the Tender.



Z) TESTING OF AIR-CONDITIONING SYSTEM:

Routine and type tests for the various items of equipment of the system shall be performed at the Contractor’s own cost and test certificates are to be submitted.

The performance tests to determine whether or not the full intent of the specification is met shall be conducted by the contractor. After notification to IIT that the installation has been completed and the plant has run continuously for a period of atleast one week. The contractor shall conduct under the direction and the presence of IIT / TCE / consultant such tests as specified to establish the capacity of various equipment supplied and installed by the contractor.

The contractor shall operate, test and adjust the air-conditioning system units, fan, motors, all air handling appliances including adjustment of regulators, dampers, etc. All testing equipments, labour, operating personnel, oil, refrigerant or any other item required for these tests shall be provided by the contractor to enable the plant to be put in a continuous running test.

TEST PROCEDURE:

1. Design Conditions:

The inside and outside conditions shall be recorded on hourly basis. The outside and inside dry bulb and wet bulb temperatures shall be recorded by means of a sling psychrometer with mercury thermometers. The relative humidity shall be computed from the psychometric chart. The inside dry bulb temperature and relative humidity shall fall within the specified limits.

2. Capacity of the Plant: The following aspects shall be checked before conducting the performance tests:

a) The outside conditions shall be as close to the design values as possible. b) The internal loads of various spaces shall be close to the design values as far as

possible. Otherwise internal loads shall be simulated to a value required to satisfy the design condition.

c) The plant shall be fully loaded and the temperature stabilized. d) Hourly readings of water flow shall be recorded. e) Hourly readings of pressure, temperature, electrical current, voltage and power factor

shall be recorded. 3. Cooling coils of air-handling units: The flow of air over the cooling coil shall be measured by recording the velocity of air across

each filter placed before the cooling coil. The velocity shall be measured by means of an anemometer.



Air quantity across the filters = Velocity of air across the filter in FPM x Net filter area in Sq.ft.

The wet bulb temperature of air entering the coil and that leaving the coil shall be

measured. The enthalpy of entering and leaving air shall be noted from psychometric chart,

Corresponding to the WB temperature recorded.

Say, he = Enthalpy of entering air in btu/lb. hl = Enthalpy of leaving air in btu/lb.

Capacity of AHU in TR = (cfm of AHU x dh x 4.5) / 12000

(Where dh is the difference of temp. air entering and leaving across the coils)

CHILLER The temperature of inlet and outlet water, water flow and pressure drop shall be measured. Plant capacity in TR = Water flow thro chiller (in gpm) x 500 x 1.8 x dT (oC) /12,000 (Where dT = Temperature of entering water - Temperature of leaving water)

COMPRESSOR The following readings shall be recorded:

a) Suction gas pressure b) Discharge gas pressure c) Suction gas temperature d) Discharge gas temperature e) Readings of ammeter, voltmeter & power factor meter.

Same pressure gauge shall be used for different measurements and the same thermometer

shall be used for different temperature measurements. The capacity of the compressor shall be computed from the performance chart supplied by the manufacturer.

KW/Ton of the compressor = (Power Input in KW) Compressor capacity in TR



AIR BALANCING After the desired inside conditions are achieved the quantity of air through every outlet shall be

measured: Air Qty (CFM) = Air velocity at the outlet in FPM x Effective area of the outlet in Sft.

PERFORMANCE TESTING AT VARIOUS LOADING CONDITIONS: The performance tests shall be conducted for various loads such as 100%, 75%, 50%, and 25%

of the capacity of the plant. Functional Tests Electrical Equipment:

1) All the cables shall be tested for continuity and absence of cross phasing. Insulation resistance between the phase conductors and the earth shall be measured with the help of a 500 V megger.

2) Motors:

a) Insulation Resistance of all motors shall be tested with megger and the value shall not be less than 1 Meg-ohm.

b) Starting current shall be recorded. c) Starter operation shall be checked for single phasing by removing one of the phases. d) Overload protection shall be checked by altering the starter thermal overload setting.

SAFETY DEVICES & CONTROLS:

a) Interlocks for compressor motor with that of chilled water pumps shall be checked. b) Flow switches in chilled water lines shall be checked. c) High pressure-stat shall be checked by varying the setting of the cutout. d) Low pressure stat shall be tested by closing the pilot solenoid valve. e) Anti-freeze thermostat shall be tested by varying the setting. f) Oil failure switch shall only be tested by varying the setting. g) Functions of safety device and controls to be checked.

CAPACITY CONTROL:

The capacity control arrangement shall be tested by varying the load on the plant. Any other

procedure recommended by the manufacturer’s may be adopted with prior permission.

The following readings shall be recorded hourly during the tests and capacity of the plant shall be computed.



Compressor a) Suction pressure - Kg/cm2 (psi) b) Suction temperature - oC (oF) c) Discharge pressure - Kg/cm2 (psi) d) Condensing Tempr. - oC (oF) e) Oil pressure - Kg/cm2 (psi) f) Compressor Speed - RPM Compressor motor: a) Rated capacity - HP b) Rated volts - Volts c) Rated current - Amps d) Starting current - Amps Power consumption for 100%, 75%, 50% & 25% loads a) Motor current in amps. - Amps b) Voltage - Volts c) Starting current. - Amps Condenser a) Refrigerant condensing pressure - Kg/cm2 (psi) b) Refrigerant condensing Temp. - oC (oF) c) Temp. of water entering - oC (oF) d) Temp. of water leaving - oC (oF) e) Water flow rate - lit/sec. (gpm) Evaporator a) Refrigerant evaporating pressure - Kg/cm2 (psi) b) Refrigerant evaporating Temp. - oC (oF) c) Water flow rate - lit/sec. (gpm) d) Entering water temp. - oC (oF) e) Leaving water temp. - oC (oF) f) Pressure drop through chiller - kg/cm2 Air handling units a) Air velocity - M/Hr. (FPM) b) Coil face area - M2 (SFT) c) Air quantity - M3/Hr. (CFM) d) Entering air temp. DB - oC (oF) e) Entering air temp. WB - oC (oF) f) Leaving air temp. DB - oC (oF) g) Leaving air temp. WB - oC (oF) h) Entering water temp. - oC (oF)



i) Leaving water temp. - oC (oF) j) Entering water pressure - Kg/Cm2 (psi) k) Leaving water pressure - Kg/Cm2 (psi) l) Water flow rate - lit/sec. (gpm) Chilled Water Pump a) Flow Rate - lit/Sec. (gpm) b) Discharge pressure - Kg/Cm2 (psi) c) Suction pressure - Kg/Cm2 (psi) Pump motor a) Rated HP - HP b) Rated current - Amps c) Rated volts - Volts d) Actual current - Amps e) Starting current - Volts Air Grilles a) Area of Grilles - M2 (Sft) b) Velocity - M/Hr (FPM) c) Air flow rate - M3 (FPM) d) Temperature DB - oC (oF) e) Temperature WB - oC (oF) Air Diffusers a) Area - M2 (Sft) b) Velocity - M/Hr (FPM) c) Air flow rate - M3 (FPM) d) Temperature DB - oC (oF) e) Temperature WB - oC (oF) Filters a) Total area - M2 (Sft) b) Effective area - M2 (Sft) c) Velocity of air - M/Hr (FPM) d) Quantity of air - M3 (CFM)



AA) SCHEDULE OF TECHNICAL DATA

Contractor should furnish technical data as mentioned below, of the equipment and accessories offered by him as per scheme given in schedule of equipment and Bill of Quantities.

1. AIR COOLED WATER CHILLING MACHINE i) COMPRESSOR. a) Manufacturer (Make) b) Country of Origin c) Model d) Rated Capacity (TR) e) Type (Hermetic) f) Refrigerant g) Quantity of refrigerant for initial charge (KG) h) Working pressure (Kg/CM2) i) Number of Compressors j) Power consumption IKW/TR (AHRI/ design

condition) k) 100% load l) 75% load m) 50% load n) 25% load

o) Recommended Range of capacity control. p) Type of bearings. q) Lubrication arrangement ii) COMPRESSOR MOTOR : a) Motor manufacturer b) Type c) K W Rating. d) Electrical Characteristics (±10% voltage

variation) e) Motor RPM. f) Insulation class. g) Enclosure/protection class. h) Efficiency. i) Starter manufacturer & mode of start. j) Starting current (Amps) k) Full load current FLA (Amps) l) Locked rotor current (Amps) m) Type of vibration Isolation for n) compressor and motor.



iii) CONDENSER a) Manufacturer (Make) Model b) Coil Material c) Fin Material d) Face Area e) Row Deep f) Fan CMH g) Fan Motor KW h) No. of Fans. i) Air temperature In/Out (Deg F/Deg C) j) ACTUAL capacity of condenser at above

conditions(TR) iv) CHILLER a) Manufacturer (Make) Model b) Shell Material c) Tube material d) Fouling factor (FPS) e) Water Flow (USGPM) f) Water velocity (FPS) g) Pressure drop (FT of water) h) Shell insulation at MFR works – Material & Thickness

(mm) i) Water temperature, IN/OUT (Deg F/Deg C) j) ACTUAL capacity of chiller at above conditions (TR) v) MICROPROCESSOR CONTROL CENTRE a) Indicate point wise display system, set points etc. b) Interface with BAS (Confirm provided)

vi) GENERAL. a) Original computer printout of machine selection from

manufacturer to be attached with the b) Offer confirm. c) Overall Dimension(M) d) Length e) Breadth f) Height g) Operating weight (kg) / shipping wt. h) Service clearance required (M) L x B x H. i) Noise level at 1 M distance. j) Type of vibration isolators



2. CHILLED WATER PUMPS a) Manufacturer b) Model c) Type d) Capacity (USGPM) / (LPM) e) Head (M-Wg) f) Efficiency (%) g) Pump (RPM) h) B.H.P i) Motor (KW) j) Motor make. k) Electrical characteristics (±10% voltage

variation) l) Motor efficiency m) Class of insulation. n) Full load current (Amps) o) Starting current (Amps) p) Locked rotor current on full load (Amps) q) Impeller/casing/shaft material r) Type of water seals. s) Vibration isolation t) Operating weight (Kg) u) Overall dimensions (M)(LxWxH) 3. AIR HANDLING UNIT i) General a) Manufacturer b) Model c) Type of unit (Double/Single skin) (draw-

thru/blow thru) d) Material and thickness of casing (inner/outer) e) Material and thickness of drain pan. f) Material and thickness of sandwiched

insulation for drain pan g) Type of vibration isolator ii) Fan Section. a) Manufacturer. b) Type of fan c) Material and thickness of fan wheel blades d) Material and thickness of housing. e) Confirm statically and dynamically balanced f) Type of bearings. g) Fan RPM



iii) Motors a) Manufacturer b) Type c) Electrical characteristics (±10% voltage

variation) d) Motor speed (RPM) e) Motor Efficiency f) Class of Insulation iv) Cooling Coil a) Manufacturer b) Material of tubes c) Material of fins d) No of fins/ cm. e) Test pressure. v) Air Filters a) Manufacturer b) Type of filters c) Filter medium d) Pressure drop across filters (mm. of water) /

Clean & Dirty e) Efficiency vi) AIR HANDLING UNITS (OPERATING DATA) a) AHU NO. b) AIR QTY (CFM) c) ESP (MM) d) COIL FACE AREA (Sqm) e) CHILLED WATER IN/OUT TEMP f) AIR LEAVING TEMP AT COIL g) FILTER FACE VEL (m.) h) FAN OUTLET VEL (FPM) i) NO. OF ROWS j) FAN MOTOR (KW) k) OVERALL DIMENSIONS l) LxWxH (METRES) m) OPERATING WEIGHT vii) VARIABLE SPEED FREQUENCY DRIVE FOR AHU a. Make / Country of Origin b. Model No. c. Type d. Motor Rating e. Rated Current f. Maximum Output



g. PID Controller h. Interface with BAS. i. Hormonic filter builtin (Confirm) j. Fault Indication. k. Dimensions (mm) l. No. of Steps m. Operating Weight 4. AIR WASHER i) General a) Manufacturer b) Model c) Type of unit (Double/Single skin) (draw-

thru/blow thru) d) Material and thickness of casing (inner/outer) e) Material and thickness of drain pan. f) Material and thickness of sandwiched

insulation for drain pan g) Type of flexible connection h) Type of vibration isolator ii) Fan Section. a) Manufacturer. b) Type of fan c) Material and thickness of fan wheel blades d) Material and thickness of housing. e) Confirm statically and dynamically balanced f) Type of bearings. g) Fan RPM iii) Motors a) Manufacturer b) Type c) Electrical characteristics (±10% voltage

variation) d) Motor speed (RPM) e) Motor Efficiency f) Class of Insulation iv) FILLS a) Manufacturer b) Fill Type c) Fill Thickness



v) Air Filters a) Manufacturer b) Type of filters c) Filter medium d) Pressure drop across filters (mm. of water) /

Clean & Dirty e) Efficiency vi) Pumps a) Manufacturer b) Model c) Type d) Capacity (USGPM) / (LPM) e) Head (M-Wg) f) Efficiency (%) g) Pump (RPM) h) B.H.P i) Motor (KW) j) Motor make. k) Motor efficiency l) Class of insulation. 5. FAN COIL UNITS Capacity (TR) 1 1.5 2 2.5 3 a) Manufacturer b) Model Type c) Actual Capacity (TR) at

HI Speed. MED Speed LO speed.

d) Actual Air Quantity (CFM) at HI Speed. MED Speed LO speed.

e) Coil detail face area (m2) CHILLED WATER IN/OUT TEMP AIR LEAVING TEMP AT COIL

f) Unit size : L mm W mm H mm

g) Material/Gage Casing Blowers



Drain pan with sandwitch insulation . Copper Tubes dia & wall thickness Fins/ cm.

h) Rows of cooling coil i) Type of filter j) Motor make k) Motor H P,RPM l) Electrical characteristics. (230 ± 6% volts) m) Material of flexible connection n) Type of vibration isolators 6. FAN SECTION i) General a. Manufacturer. b. Type of fan c. Material and thickness of fan wheel blades d. Material and thickness of housing. e. Confirm statically and dynamically balanced f. Type of bearings. g. Fan RPM ii) MOTORS a. Manufacturer b. Type c. Electrical characteristics (±10% voltage variation) d. Motor speed (RPM) e. Motor Efficiency f. Class of Insulation iii) AIR FILTERS a. Manufacturer b. Type of filters c. Filter medium d. Pressure drop across filters (mm. of water) / Clean

& Dirty e. Efficiency



7. CENTRIFUGAL / AXIAL FLOW FANS i) GENERAL a) Manufacturer b) Type c) Bearings d) Casing Material e) Impeller Material f) Shaft Material g) Vibration Isolators h) Fan Size and Model i) Fan speed j) Fan efficiency k) Noise level l) Noise attenuator

Manufacturers Type DB reduction guaranteed at 2 M & 3 M

distance from Noise attenuator length (Metre)

m) Motor manufacturer type operating speed motor efficiency and class of insulation. Electrical Characteristics (±10% voltage

variation). Type of starter & manufacturer

n) Type of drive o) Material of flexible connection p) Type of vibration isolators ii) OPERATING DATA Centrifugal / Axial Flow a) FAN MODEL b) FAN CFM c) FAN OUTLET VELOCITY (MPM) d) SP (MM) e) FAN RPM f) NOISE LEVEL (DB) g) DB REDUCTION BY ATTENUATOR h) RESULTANT NOISE LEVEL (DB) i) BHP/ KW j) LIMIT LOAD HP/ KW k) MOTOR (HP)/ KW l) FULL LOAD CURRENT (AMPS) m) STARTING CURRENT (AMPS)



8. INLINE FANS a. Manufactures Name : b. Capacity CMH : c. Static Pressure : d. Motor BHP & HP : e. Fan Diameter mm : 9. PROPELLER FANS/ROOF EXTRACTORS a) Manufacturer b) Motor HP c) Capacitors provided. d) Speed Regulator e) Gravity louvers f) Single phase preventor g) Back draft damper. h) Bird Screen i) Wire guard 10. CONTROLS i) 2 Way Valve AHU’s FCU’s a) Make of valve b) Model c) Type (Modulating/Diverting) d) Modulating Motor make e) Model f) Spring return function g) Pressure rating h) Voltage of motor i) Transformer provided j) Valve linkage make and model. ii) Thermostat a) Make / Type b) Model c) Cooling/heating or cooling only d) Range e) Differential f) Electrical characteristics 11. WATER PIPING Item Make Material a. Make of pipes / class of pipes b. Pipe Wall thickness c. Valves



Butterfly valves Gate valve Globe valve Check valve Ball valve Ball valve with strainer Balancing valve Pot Strainer Y-Strainer

d. Pressure Gauge Make Range Dial Size

e. Thermometer (Make/Type & Range)

f. Flow Meter Type and Make Size of flow meter

g. Make of Manometer 12. GALVANISED STEEL SHEETS Item Make Material a. Make b. Thickness/Gage c. Class of Galvanizing 13. GRILLES / DIFFUSERS / DAMPERS Item Make Material & Gauge a. Fire damper, rating, make of

damper motor b. Smoke damper, rating, make

of damper motor c. Grilles/Diffuser d. Slot Diffuser e. Duct Damper f. FA Damper g. Access Panel.



14. INSULATION Item Make Material & Density a) Duct acoustic lining b) Duct insulation c) Pipe insulation 15. ELECTRICAL TECHNICAL DATA SHEETS Item a. Manufacturer & Model No. b. Maximum rating Amps. c. Type of overload relay d. Type of reset e. Solenoid coil voltage f. Single Phase Preventer Manufacturer Model No. & Type 16. THERMAL STORAGE TANK a. Capacity b. Design pressure c. Shell material d. Shell/Dish end Thickness e. Insulation Thickness & material. f. Ambient at design condition



II) STANDARD SPECIFICATION OF BUILDING MANAGEMENT SYSTEM (BMS): PART – I: GENERAL:

1.0 SUMMARY: Furnish all labor, materials, equipment, and service necessary for a complete and operating

Building Management System (BMS), utilizing Direct Digital Controls as shown on the drawings, as in attached Input/Output Summary and as described herein. Drawings are diagrammatic only.

All labor, material, equipment and software not specifically referred to herein or on the plans,

that is required to meet the functional intent of this specification, shall be provided without additional cost to the Client.

Client shall be the named license holder of all software associated with any and all incremental

work on the project(s).

2.0 SYSTEM DESCRIPTION: The entire Building Management System (BMS) shall be comprised of a network of

interoperable, stand-alone digital controllers communicating via LonMark / LonTalk communication protocols to a Network Area Controller (NAC) / Router. Building Management System products shall be manufactured as per LonWorks products must be approved in writing by the consulting Engineer and be submitted for approval ten (10) days prior to the date of the bid submittal.

The entire Integrated Control and Monitor Management System (IBMS) shall be comprise of a

network of interoperable, stand-alone digital controllers communicating on an open protocol communication network to a host computer within the facility (when specified) and communicating via the Internet to a host computer in a remote location. The IBMS shall communicate to third party systems such as Chillers, Boilers, Air-Handling Systems, Energy metering systems, Lighting Management System & other energy management systems, Fire-Life safety systems and other building management related devices with open, interoperable communication capabilities.

The IBMS framework shall utilize JAVA based automation products and services with built-in

Internet connectivity to a broad range of distribution partners in the building automation, energy services, power/utility, and industrial sectors. The Framework shall bring together the computerization of control applications under the umbrella of single integrated system architecture. The suite of component software applications shall support true plug-and-play, multi-vendor interoperability, resulting in lower automation and information infrastructure costs. The Network Area Controllers (NAC’s) shall run a JAVA Virtual Machine (JVM) platform and use a common set of tools for accessing and integrating multiple protocols.

The Building Management System (BMS) shall be comprised of Network Area Controller or

Controllers (NAC) / Routers. The NAC / Router shall connect to the local or wide area network, depending on configuration. Access to the system, either locally in each building, or remotely from a central site or sites, shall be accomplished through standard Web browsers, via the



Internet and/or local area network. Each NAC shall communicate to LonMark/LonTalk and/or BACnet Direct Digital Controllers (DDC) and other open protocol systems/devices.

The following software packages shall be loaded into the system as minimum standard :-

a) Complete system operational software. b) Site specific data manipulation software c) Active graphics software d) Energy management system software e) Alarm indication software f) Data Visualization Package g) Internet Enabled Remote Monitoring Package.

3.0 SUBMITTAL Eight copies of shop drawings of the components and devices for the entire control system shall

be submitted and shall consist of a complete list of equipment and materials, including manufacturers catalog data sheets and installation instructions for all controllers, valves, dampers, sensors, routers, etc. Shop drawings shall also contain complete wiring and schematic diagrams, software descriptions, calculations, and any other details required to demonstrate that the system has been coordinated and will properly function as a system. Terminal identification for all control wiring shall be shown on the shop drawings. A complete written Sequence of Operation shall also be included with the submittal package. BMS contractors supplying products and systems, as part of their packages shall provide catalog data sheets, wiring diagrams and point lists to other contractors for proper coordination of work.

Submittal shall also include a trunk cable schematic diagram depicting operator workstations,

control panel locations and a description of the communication type, media and protocol. BMS contractors shall provide these diagrams for their portions of work; the Systems Integrator shall be responsible for integrating those diagrams into the overall trunk cable schematic diagrams for the entire Wide Area Network (WAN).

Submittal shall also include a complete point list of all points to be connected to the BMS. Upon completion of the work, provide a complete set of ‘as-built’ drawings and application

software on compact disk. Drawings shall be provided as AutoCAD™ compatible files. Eight copies of the ‘as-built’ drawings shall be provided in addition to the documents on compact disk. BMS contractors shall provide as-built for their portions of work. The BMS contractor shall be responsible for as-built pertaining to overall BMS architecture and network diagrams. All as-built drawings shall also be installed into the BMS server in a dedicated directory.

4.0 SPECIFICATION NOMENCLATURE Acronyms used in this specification are as follows: FMCS Facility Management and Control System

BMS Building Management System NAC Network Area Controller DDC Direct Digital Controller IBC Interoperable BACnet Controller GUI Graphical User Interface WBI Web Browser Interface PMI Power Measurement Interface



LAN Local Area Network WAN Wide Area Network OOT Object Oriented Technology PICS Product Interoperability Compliance Statement

5.0 DIVISION OF WORK The BMS contractor shall be responsible for all controllers (DDC), control devices, control

panels, controller programming, controller programming software, controller input/output and power wiring and controller network wiring.

The BMS contractor shall also be responsible for the Network Area Controller(s) (NAC), software

and programming of the NAC, graphical user interface software (GUI), development of all graphical screens, Web browser pages, setup of schedules, logs and alarms, LonWorks network management and connection of the NAC to the local or wide area network.

6.0 AGENCY AND CODE APPROVALS All products of the BMS shall be provided with the following agency approvals. Verification that

the approvals exist for all submitted products shall be provided with the submittal package. Systems or products not currently offering the following approvals are not acceptable. 1) UL-916; Energy Management Systems

2) C-UL listed to Canadian Standards Association C22.2 No. 205-M1983 “signal Equipment”

3) CE

4) FCC, Part 15, Subpart J, Class A Computing Devices

7.0 SOFTWARE LICENSE AGREEMENT The CLIENT shall agree to the manufacturer's standard software and firmware licensing

agreement as a condition of this contract. Such license shall grant use of all programs and application software to Owner as defined by the manufacturer's license agreement, but shall protect manufacturer's rights to disclosure of trade secrets contained within such software.

The CLIENT shall be the named license holder of all software associated with any and all

incremental work on the project(s). In addition, CLIENT shall receive ownership of all job specific configuration documentation, data files, and application-level software developed for the project. This shall include all custom, job specific software code and documentation for all configuration and programming that is generated for a given project and/or configured for use with the NAC, BMS Server(s), and any related LAN / WAN / Intranet and Internet connected routers and devices. Any and all required IDs and passwords for access to any component or software program shall be provided to the owner. The owner shall determine which organizations to be named in the SI organization ID (“orgid”) of all software licenses. Owner shall be free to direct the modification of the “orgid” in any software license, regardless of supplier.

8.0 DELIVERY, STORAGE AND HANDLING Provide factory-shipping cartons for each piece of equipment and control device. Maintain

cartons through shipping, storage, and handling as required to prevent equipment damage. Store equipment and materials inside and protected from weather.



9.0 JOB CONDITIONS Cooperation with Other Contractors: Coordinate the Work of this section with that of other

sections to ensure that the Work will be carried out in an orderly fashion. It shall be this Contractor's responsibility to check the Contract Documents for possible conflicts between his Work and that of other crafts in equipment location, pipe, duct and conduit runs, electrical outlets and fixtures, air diffusers, and structural and architectural features.



PART – II: MATERIALS

1.0 GENERAL: The Building Management System (BMS) shall be comprised of a network of interoperable,

stand-alone digital controllers, a computer system, graphical user interface software, printers, network devices, valves, dampers, sensors, and other devices as specified herein. All systems and software within BMS shall be Year 2000 compliant and shall be supported by compliance documentation from the manufacturer.

The installed system shall provide secure password access to all features, functions and data

contained in the overall BMS.

2.0 OPEN, INTEROPERABLE, INTEGRATED ARCHITECTURES The intent of this specification is to provide a peer-to-peer networked, stand-alone, distributed

control system with the capability to integrate ANSI/ASHRAE Standard 135-2001 BACnet, LonWorks technology, MODBUS, OPC, and other open and proprietary communication protocols in one open, interoperable system.

The supplied computer software shall employ object-oriented technology (OOT) for

representation of all data and control devices within the system. In addition, adherence to industry standards including ANSI / ASHRAE™ Standard 135-2001, BACnet and LonMark to assure interoperability between all system components is required. For each LonWorks device that does not have LonMark certification, the device supplier must provide an XIF file and a resource file for the device. For each BACnet device, the device supplier must provide a PICS document showing the installed device’s compliance level. Minimum compliance is Level 3; with the ability to support data read and write functionality. Physical connection of BACnet devices shall be via Ethernet (BACnet Ethernet/IP,) and/or RS-485 (BACnet MSTP) as specified.

All components and controllers supplied under this Division shall be true “peer-to-peer”

communicating devices. Components or controllers requiring “polling” by a host to pass data shall not be acceptable.

The supplied system must incorporate the ability to access all data using standard Web

browsers without requiring proprietary operator interface and configuration programs. An Open DataBase Connectivity (ODBC) or Structured Query Language (SQL) compliant server database is required for all system database parameter storage. This data shall reside on a supplier-installed server for all database access. Systems requiring proprietary database and user interface programs shall not be acceptable.

A hierarchical topology is required to assure reasonable system response times and to manage

the flow and sharing of data without unduly burdening the customer’s internal Intranet network. Systems employing a “flat” single tiered architecture shall not be acceptable.

1) Maximum acceptable response time from any alarm occurrence (at the point of origin) to

the point of annunciation shall not exceed 5 seconds for network connected user interfaces.



2) Maximum acceptable response time from any alarm occurrence (at the point of origin) to the point of annunciation shall not exceed 60 seconds for remote or dial-up connected user interfaces.

3.0 NETWORKS The Local Area Network (LAN) shall be a 100 Megabits/sec Ethernet network supporting

BACnet, Java, XML, HTTP, and SOAP for maximum flexibility for integration of building data with enterprise information systems and providing support for multiple Network Area Controllers (NACs), user workstations and, if specified, a local server.

Local area network minimum physical and media access requirements:

1) Ethernet; IEEE standard 802.3

2) Cable; 100 Base-T, UTP-8 wire, category 5

3) Minimum throughput; 100 Mbps.

4.0 NETWORK ACCESS Remote Access. For Local Area Network installations, provide access to the LAN from a remote location, via the

Internet. The CLIENT shall provide a connection to the Internet to enable this access via high speed cable modem, asynchronous digital subscriber line (ADSL) modem, ISDN line, T1 Line or via the customer’s Intranet to a corporate server providing access to an Internet Service Provider (ISP). Customer agrees to pay monthly access charges for connection and ISP.

5.0 NETWORK AREA CONTROLLER (NAC) / ROUTER The BMS contractor shall supply one or more Network Area Controllers (NAC) / Router as part

of this contract. Number of area controllers required is dependent on the type and quantity of devices provided in IO Summary.

The Network Area Controller (NAC) / Router shall provide the interface between the LAN or

WAN and the field control devices, and provide global supervisory control functions over the control devices connected to the NAC / Router. It shall be capable of executing application control programs to provide:

1) Calendar functions

2) Scheduling

3) Trending

4) Alarm monitoring and routing

5) Time synchronization

6) Integration of LonWorks controller data and BACnet controller data

7) Network Management functions for all LonWorks based devices

The Network Area Controller must provide the following hardware features as a minimum:

1) One Ethernet Port – 10/100 Mbps



2) One RS-232 port

3) One LonWorks Interface Port – 78KB FTT-10A

4) One RS-485 ports

5) Battery Backup

6) Flash memory for long term data backup (If battery backup or flash memory is not supplied, the controller must contain a hard disk with at least 1 gigabyte storage capacity)

7) The NAC / Router must be capable of operation over a temperature range of 32 to 122°F

8) The NAC / Router must be capable of withstanding storage temperatures of between 0 and 158°F

9) The NAC / Router must be capable of operation over a humidity range of 5 to 95% RH, non-condensing

The NAC / Router shall provide multiple user access to the system and support for ODBC or SQL. A database resident on the NAC / Router shall be an ODBC-compliant database or must provide an ODBC data access mechanism to read and write data stored within it.

The NAC / Router shall support standard Web browser access via the Intranet/Internet. It

shall support a minimum of 32 simultaneous users.

Event Alarm Notification and actions 1) The NAC / Router shall provide alarm recognition, storage; routing, management, and

analysis to supplement distributed capabilities of equipment or application specific controllers.

2) The NAC / Router shall be able to route any alarm condition to any defined user location whether connected to a local network or remote via dial-up telephone connection, or wide-area network.

3) Alarm generation shall be selectable for annunciation type and acknowledgement requirements including but limited to:

a) To alarm

b) Return to normal

c) To fault

4) Provide for the creation of a minimum of eight of alarm classes for the purpose of routing types and or classes of alarms, i.e.: Electricals, HVAC, Fire, etc.

5) Provide timed (schedule) routing of alarms by class, object, group, or node.

6) Provide alarm generation from binary object “runtime” and /or event counts for equipment maintenance. The user shall be able to reset runtime or event count values with appropriate password control.

Control equipment and network failures shall be treated as alarms and annunciated.

Alarms shall be annunciated in any of the following manners as defined by the user: 1) Screen message text



2) Email of the complete alarm message to multiple recipients. Provide the ability to route and email alarms based on:

a) Day of week

b) Time of day

c) Recipient

3) Pagers via paging services that initiate a page on receipt of email message

4) Graphic with flashing alarm object(s)

5) Printed message, routed directly to a dedicated alarm printer

The following shall be recorded by the NAC / Router for each alarm (at a minimum):

1) Time and date

2) Location (building, floor, zone, office number, etc.)

3) Equipment (air handler #, accessway, etc.)

4) Acknowledge time, date, and user who issued acknowledgement.

5) Number of occurrences since last acknowledgement.

Alarm actions may be initiated by user defined programmable objects created for that purpose.

Defined users shall be given proper access to acknowledge any alarm, or specific types or

classes of alarms defined by the user. A log of all alarms shall be maintained by the NAC / Router and/or a server (if configured in

the system) and shall be available for review by the user. Provide a “query” feature to allow review of specific alarms by user defined parameters. A separate log for system alerts (controller failures, network failures, etc.) shall be provided

and available for review by the user. An Error Log to record invalid property changes or commands shall be provided and

available for review by the user.

6.0 DATA COLLECTION AND STORAGE The NAC / Router shall have the ability to collect data for any property of any object and store this data for future use.

The data collection shall be performed by log objects, resident in the NAC / Router that shall have, at a minimum, the following configurable properties:

1) Designating the log as interval or deviation.

2) For interval logs, the object shall be configured for time of day, day of week and the sample collection interval.

3) For deviation logs, the object shall be configured for the deviation of a variable to a fixed value. This value, when reached, will initiate logging of the object.



4) For all logs, provide the ability to set the maximum number of data stores for the log and to set whether the log will stop collecting when full, or rollover the data on a first-in, first-out basis.

5) Each log shall have the ability to have its data cleared on a time-based event or by a user-defined event or action.

All log data shall be stored in a relational database in the NAC / Router and the data shall be accessed from a server (if the system is so configured) or a standard Web browser. All log data, when accessed from a server, shall be capable of being manipulated using standard SQL statements. All log data shall be available to the user in the following data formats:

1) HTML

2) XML

3) Plain Text

4) Comma or tab separated values

Systems that do not provide log data in HTML and XML formats at a minimum shall not be acceptable. The NAC / Router shall have the ability to archive its log data either locally (to itself), or remotely to a server or other NAC / Router on the network. Provide the ability to configure the following archiving properties, at a minimum:

1) Archive on time of day

2) Archive on user-defined number of data stores in the log (buffer size)

3) Archive when log has reached it’s user-defined capacity of data stores

4) Provide ability to clear logs once archived

7.0 AUDIT LOG Provide and maintain an Audit Log that tracks all activities performed on the NAC / Router.

Provide the ability to specify a buffer size for the log and the ability to archive log based on time or when the log has reached its user-defined buffer size. Provide the ability to archive the log locally (to the NAC / Router), to another NAC / Router on the network, or to a server. For each log entry, provide the following data:

1) Time and date

2) User ID

3) Change or activity: i.e., Change setpoint, add or delete objects, commands, etc.

8.0 DATABASE BACKUP AND STORAGE The NAC / Router shall have the ability to automatically backup its database. The database shall

be backed up based on a user-defined time interval. Copies of the current database and, at the most recently saved database shall be stored in the

NAC / Router. The age of the most recently saved database is dependent on the user-defined database save interval.



The NAC / Router database shall be stored, at a minimum, in XML format to allow for user viewing and editing, if desired. Other formats are acceptable as well, as long as XML format is supported.

9.0 DIRECT DIGITAL CONTROLLERS (DDC) Direct Digital Controllers shall be 16 bit microprocessor based Interoperable LonWorks

Controllers. The Network Area Controller (NAC) / Router will provide all scheduling, alarming, trending, and

network management for the LonMark / LonWorks based devices. The DDCs shall communicate with the NAC / Router at a baud rate of not less than 78.8K baud.

The DDC shall provide LED indication of communication and controller performance to the technician, without cover removal.

All DDCs shall be fully application programmable. Controllers offering application selection only

(non programmable), require a 10% spare point capacity to be provided for all applications. All control sequences within or programmed into the DDC shall be stored in non-volatile memory, which is not dependent upon the presence of a battery, to be retained.

The BMS contractor supplying the DDC’s shall provide documentation for each device, with the

following information at a minimum:

1) Network Variable Inputs (nvi’s); name and type

2) Network Variable Outputs (nvo’s); name and type

3) Network configuration parameters (nci, nco); name and type

It is the responsibility of the BMS contractor to ensure that the proper Network Variable Inputs

and Outputs (nvi and nvo) are provided in each DDC, as required by the point charts. The supplier of any programmable DDC shall provide one copy of the manufacturer’s

programming tool, with documentation, to the CLIENT. The controller shall be capable of either integrating with other LonMark™ devices or stand-

alone operation. The controller shall have two microprocessors. The Host processor contains on-chip FLASH

program memory, FLASH information memory, and RAM to run the main HVAC application. The second processor for LonWorks™ network communications.

1) FLASH Memory Capacity: 60 Kilobytes with 8 Kilobytes for application program.

2) FLASH Memory settings retained for ten years.

3) RAM: 2 Kilobytes

The controller shall have an FTT transformer-coupled communications port interface for

common mode-noise rejection and DC isolation.



The controller shall have an internal time clock with the ability to automatically revert from a master time clock on failure.

1) Operating Range: 24 hour, 365 day, multi-year calendar including day of week and configuration for automatic day-light savings time adjustment to occur on configured start and stop dates.

2) Accuracy: ±1 minute per month at 77° F (25° C).

3) Power Failure Backup: 24 hours at 32° to 122° F (0° to 50° C).

The controller shall have Significant Event Notification, Periodic Update capability, and Failure Detect when network inputs fail to be detected within their configurable time frame.

Rated voltage: 20-30 VAC, 50/60 Hz

The controller shall have an internal DC power supply to power external sensors.

a) Power Output: 20 VDC ±10% at 75 mA.

The controller shall have a visual indication (LED) of the status of the device:

a) Controller operating normally.

b) Controller in process of download.

c) Controller in manual mode under control of software tool.

d) Controller lost its configuration.

e) No power to controller, low voltage, or controller damage.

f) Processor and/or controller is not operating.

The minimum controller Environmental ratings:

a) Operating Temperature Ambient Rating: -40° to 150° F (-40° to 65.5° C).

b) Storage Temperature Ambient Rating: -40° to 150° F (-40° to 65.5° C).

c) Relative Humidity: 5% to 95% non-condensing.

The controller shall have the additional approval requirements, listings, and approvals:

a) UL/cUL (E87741) listed under UL916 (Standard for Open Energy Management Equipment) with plenum rating.

b) CSA (LR95329-3) Listed

c) Meets FCC Part 15, Subpart B, Class B (radiated emissions) requirements.

d) Meets Canadian standard C108.8 (radiated emissions).

e) Conforms requirements European Consortium standard EN 61000-6-1; 2001 (EU Immunity)

f) Conforms requirements European Consortium standard EN 61000-6-3; 2001 (EU Emission)



The controller shall have three analog outputs (AO).

a) Analog outputs (AO) shall be capable of being configured as digital outputs (DO).

b) Input and Output wiring terminal strips shall be removable from the controller without disconnecting wiring.

c) Input and Output wiring terminals shall be designated with color coded labels.

The controller shall provide for “user defined” Network Variables (NV) for customized configurations.

10.0 GRAPHICAL USER INTERFACE SOFTWARE Operating System:

The GUI shall run on Microsoft Windows XP Professional.

The GUI shall employ browser-like functionality for ease of navigation. It shall include a tree view (similar to Windows Explorer) for quick viewing of, and access to, the hierarchical structure of the database. In addition, menu-pull downs, and toolbars shall employ buttons, commands and navigation to permit the operator to perform tasks with a minimum knowledge of the HVAC Control System and basic computing skills. These shall include, but are not limited to, forward/backward buttons, home button, and a context sensitive locator line (similar to a URL line), that displays the location and the selected object identification.

Real-Time Displays. The GUI, shall at a minimum, support the following graphical features and functions:

1) Graphic screens shall be developed using any drawing package capable of generating a GIF,

BMP, or JPG file format. Use of proprietary graphic file formats shall not be acceptable. In addition to, or in lieu of a graphic background, the GUI shall support the use of scanned pictures.

2) Graphic screens shall have the capability to contain objects for text, real-time values, animation, color spectrum objects, logs, graphs, HTML or XML document links, schedule objects, hyperlinks to other URL’s, and links to other graphic screens.

3) Graphics shall support layering and each graphic object shall be configurable for assignment

to a layer. A minimum of six layers shall be supported.

4) Modifying common application objects, such as schedules, calendars, and set points shall

be accomplished in a graphical manner.

a. Schedule times will be adjusted using a graphical slider, without requiring any keyboard entry from the operator.

b. Holidays shall be set by using a graphical calendar without requiring any keyboard entry

from the operator.



5) Commands to start and stop binary objects shall be done by right-clicking the selected object and selecting the appropriate command from the pop-up menu. No entry of text shall be required.

6) Adjustments to analog objects, such as set points, shall be done by right-clicking the selected object and using a graphical slider to adjust the value. No entry of text shall be required.

System Configuration. At a minimum, the GUI shall permit the operator to perform the

following tasks, with proper password access:

1) Create, delete or modify control strategies.

2) Add/delete objects to the system.

3) Tune control loops through the adjustment of control loop parameters.

4) Enable or disable control strategies.

5) Generate hard copy records or control strategies on a printer.

6) Select points to be alarmable and define the alarm state.

7) Select points to be trended over a period of time and initiate the recording of values automatically.

On-Line Help : Provide a context sensitive, on-line help system to assist the operator in

operation and editing of the system. On-line help shall be available for all applications and shall provide the relevant data for that particular screen. Additional help information shall be available through the use of hypertext. All system documentation and help files shall be in HTML format.

Security : Each operator shall be required to log on to that system with a user name and

password in order to view, edit, add, or delete data. System security shall be selectable for each operator. The system administrator shall have the ability to set passwords and security levels for all other operators. Each operator password shall be able to restrict the operators’ access for viewing and/or changing each system application, full screen editor, and object. Each operator shall automatically be logged off of the system if no keyboard or mouse activity is detected. This auto log-off time shall be set per operator password. All system security data shall be stored in an encrypted format.

System Diagnostics : The system shall automatically monitor the operation of all workstations,

printers, modems, network connections, building management panels, and controllers. The failure of any device shall be annunciated to the operator.

Programming software shall be same as GUI. The Same GUI can be used to configure the DDCs & NAC.

Alarm Console

1) The system will be provided with a dedicated alarm window or console. This window will notify the operator of an alarm condition, and allow the operator to view details of the alarm and acknowledge the alarm. The use of the Alarm Console can be enabled or disabled by the system administrator.



2) When the Alarm Console is enabled, a separate alarm notification window will supercede all other windows on the desktop and shall not be capable of being minimized or closed by the operator. This window will notify the operator of new alarms and un-acknowledged alarms. Alarm notification windows or banners that can be minimized or closed by the operator shall not be acceptable.

11.0 SPECIAL ENERGY MANAGEMENT REPORTING AND PROFILING APPLICATIONS

These reports are defined below.

1. Aggregate Demand Summary - This report aggregates (totalizes) multiple points (meters) and shows the peak, minimum, average, and total consumption as well as computes load factor. By reducing peak consumption and leveling the total load, volatility is reduced and energy customers can make significant improvements in their energy procurement. This report will help identify favorable aggregation combinations and unattractive peaks. Once the user selects this report, they define parameters such as sites, meters, time period, and commodity. The following screen shot is an example of Aggregate Demand Summary.



2. Summary Ranking Reports - By selecting this report, the user can identify the 10 worst or 10 best sites in the database. Once the report type has been selected, parameters to define before the report can be generated will include the following:

a. Measurement unit – KW, therms, CCF gallons, PSI, etc. The database will search for all values matching the request.

b. Compare an entire facility or normalize by square foot

c. Time periods to compare

d. Highest values or lowest values – Will be able to view either the best or worst 10 points matching the defined parameters

e. Cost or consumption in future revisions

3. Spectrum Summary Report – A quick view of any point or aggregated point with color coding identifying the reasonableness of the data value. The chart can report on up to one year of data, with the ability to zoom to a higher definition. As data values approach and/or exceed historical ranges, the color on the graph will change to identify such. If all data values are within historical ranges, the user can move on to other functions. In the following screen shot, the Spectrum Summary Report is reporting on total electricity for an aggregated point, which consists of 6 schools. The reporting period is six weeks, with the blue identifying low loads overnight and on weekends. The fourth weekend in the report was a three day weekend which is identified by a larger blue gap. A user can also see rising consumption (red) as temperatures rise going into the summer season. When the user clicks on an area of the graph, the data value along with time stamp will appear. The colors and associated data value ranges are user definable. The following screen shot is an example of the Spectrum Summary Report.



4. Equipment Operation Reports - Users will have the ability to analyze digital points and identify run times. Comparisons between sites or points can be made and run times can be graphed. For example, comparing lighting or HVAC run hours in a group of stores or comparing HVAC run hours in June for Store 1 versus Store 2. Data will be displayed in time and percentage.

5. Relative Contribution Report – This pie chart report will give users the ability to identify how individual points contribute to a total from a point group. The user would select a group of points, calculate the aggregate consumption of the group, and report on the individual contribution of each. Data will be displayed both graphically in a pie chart as well as in tabular format. Users could identify that HVAC is 48% of the building load; lighting is 42%, or Building 1 accounts for 14% of the total enterprise load and Building 2 contributes 19%. This report will allow users to identify inefficiencies and help perform budgeting.



6. Average Profile – The report will allow the user to average the load for a single load across time periods and give the average load, and/or aggregate multiple meters (loads) and view the average aggregated load. This report will be very beneficial when negotiating with energy service providers because it includes the load profile and consumption totals. With the ability to filter by time periods, measurement units, points or point groups, weekdays, and weekends, load profiles with associated data will allow the user to procure exactly the amount of energy required. This reduces risk for the energy provider and therefore reduces cost for the end-user.

The user will be able to manipulate between 1-minute intervals and hourly intervals. In addition, users will be able to choose between auto scale and manual scale. For example, if the minimum value is 100KW and the maximum is 500 kW, the user can have the chart automatically scale between those values or they can select any range to scale the 400kW range. When printing charts, this may be useful. This will be useful for sophisticated users who need a higher resolution of data. The following screen shot is an example of the Average Profile Report.

7. Point Trending – This report will allow the user to choose a single or multiple points and trend the values over a specified time period. Either analog or digital points can be trended and multiple variables can be selected to be report. For a visual representation of several point values, the user will view all points on the left Y-axis. If the user would like to perform a statistical analysis identifying correlation coefficient and standard deviation between variables, they will have the ability to select a single point for each Y-axis. If a point group has been created, it would be presented as a single point value. The same auto scale/manual scale feature discussed in Average Profile Report is available in Point Trending. The following screen shot is an example of the Point Trending Report.



8. Exception Report – This report will identify all data values for the specified period that does not fall in a user-defined range. Although the range will be user definable, the benchmark or baseline to be compared against will be historical data. Users can get to this report by selecting it among the library of report templates, or can automatically be taken here from the Average Profile Report or Point Trending Report by clicking on an “Exception” button once a profile is being viewed.

12.0 WEB BROWSER CLIENTS

The system shall be capable of supporting an unlimited number of clients using a standard Web browser such as Internet Explorer™ or Netscape Navigator™. Systems requiring additional software (to enable a standard Web browser) to be resident on the client machine, or manufacture-specific browsers shall not be acceptable.



The Web browser software shall run on any operating system and system configuration that is supported by the Web browser. Systems that require specific machine requirements in terms of processor speed, memory, etc., in order to allow the Web browser to function with the FMCS, shall not be acceptable.

The Web browser shall provide the same view of the system, in terms of graphics, schedules, calendars, logs, etc., and provide the same interface methodology as is provided by the Graphical User Interface. Systems that require different views or that require different means of interacting with objects such as schedules, or logs, shall not be permitted.

The Web browser client shall support at a minimum, the following functions:

1) User log-on identification and password shall be required. If an unauthorized user attempts access, a blank web page shall be displayed. Security using Java authentication and encryption techniques to prevent unauthorized access shall be implemented.

2) Graphical screens developed for the GUI shall be the same screens used for the Web browser client. Any animated graphical objects supported by the GUI shall be supported by the Web browser interface.

3) HTML programming shall not be required to display system graphics or data on a Web page. HTML editing of the Web page shall be allowed if the user desires a specific look or format.

4) Storage of the graphical screens shall be in the Network Area Controller (NAC), without requiring any graphics to be stored on the client machine. Systems that require graphics storage on each client are not acceptable.

5) Real-time values displayed on a Web page shall update automatically without requiring a manual “refresh” of the Web page.

6) Users shall have administrator-defined access privileges. Depending on the access privileges assigned, the user shall be able to perform the following:

a. Modify common application objects, such as schedules, calendars, and set points in a graphical manner.

i. Schedule times will be adjusted using a graphical slider, without requiring any keyboard entry from the operator.

ii. Holidays shall be set by using a graphical calendar, without requiring any keyboard entry from the operator.

b. Commands to start and stop binary objects shall be done by right-clicking the selected object and selecting the appropriate command from the pop-up menu. No entry of text shall be required.

c. View logs and charts

d. View and acknowledge alarms

e. Setup and execute SQL queries on log and archive information

7) The system shall provide the capability to specify a user’s (as determined by the log-on user identification) home page. Provide the ability to limit a specific user to just their defined home page. From the home page, links to other views, or pages in the system shall be possible, if allowed by the system administrator.

8) Graphic screens on the Web Browser client shall support hypertext links to other locations on the Internet or on Intranet sites, by specifying the Uniform Resource Locator (URL) for the desired link.



13.0 SERVER FUNCTIONS AND HARDWARE

A central server shall be provided. The server shall support all Network Area Controllers (NAC) /Router connected to the customer’s network whether local or remote.

Local connections shall be via an Ethernet LAN. Remote connections can be via ISDN, ADSL, T1 or dial-up connection.

It shall be possible to provide access to all Network Area Controllers via a single connection to the server. In this configuration, each Network Area Controller can be accessed from a remote Graphical User Interface (GUI) or from a standard Web browser (WBI) by connecting to the server.

The server shall provide the following functions, at a minimum:

1) Global Data Access: The server shall provide complete access to distributed data defined anywhere in the system.

2) Distributed Control: The server shall provide the ability to execute global control strategies based on control and data objects in any NAC / Router in the network, local or remote.

3) The server shall include a master clock service for its subsystems and provide time synchronization for all Network Area Controllers (NAC) / Routers.

4) The server shall accept time synchronization messages from trusted precision Atomic Clock Internet sites and update its master clock based on this data.

5) The server shall provide scheduling for all Network Area Controllers and their underlying field control devices.

6) The server shall provide demand limiting that operates across all Network Area Controllers. The server must be capable of multiple demand programs for sites with multiple meters and or multiple sources of energy. Each demand program shall be capable of supporting separate demand shed lists for effective demand control.

7) The server shall implement the BACnet Command Prioritization scheme (16 levels) for safe and effective contention resolution of all commands issued to Network Area Controllers / Routers. Systems not employing this prioritization shall not be accepted.

8) Each Network Area Controller / Router supported by the server shall have the ability to archive its log data, alarm data and database to the server, automatically. Archiving options shall be user-defined including archive time and archive frequency.

9) The server shall provide central alarm management for all Network Area Controllers / Routers supported by the server. Alarm management shall include:

a. Routing of alarms to display, printer, email and pagers

b. View and acknowledge alarms

c. Query alarm logs based on user-defined parameters

10) The server shall provide central management of log data for all Network Area Controllers / Routers supported by the server. Log data shall include process logs, runtime and event counter logs, audit logs and error logs. Log data management shall include:

a. Viewing and printing log data

b. Exporting log data to other software applications

c. Query log data based on user-defined parameters



Server Hardware Requirements: The server hardware platform shall have the following requirements:

1) The computer shall be an Intel Pentium M based computer (minimum processing speed of 2.4 GHz with 1 GB RAM and a 100-gigabyte minimum hard drive). It shall include a DVD-ROM/CD-RW Combination Drive, 2-parallel ports, 2-asynchronous serial ports and 2-USB ports. A minimum 17” flat panel color monitor, 1280 x 1024 optimal preset resolution, 25 ms response time shall also be included.

2) The server operating system shall be Microsoft Windows XP Professional. Include Microsoft Internet Explorer 6.0 or later.

3) Connection to the BMS network shall be via an Ethernet network interface card, 100 Mbps.

4) A system printer shall be provided. Printer shall be laser type with a minimum 600 x 600-dpi resolution and rated for 60-PPM print speed minimum.

5) For dedicated alarm printing, provide a dot matrix printer, either 80 or 132 column width. The printer shall have a parallel port interface.

14.0 SYSTEM PROGRAMMING

The Graphical User Interface software (GUI) shall provide the ability to perform system programming and graphic display engineering as part of a complete software package. Access to the programming functions and features of the GUI shall be through password access as assigned by the system administrator.

A library of control, application, and graphic objects shall be provided to enable the creation of all applications and user interface screens. Applications are to be created by selecting the desired control objects from the library, dragging or pasting them on the screen, and linking them together using a built in graphical connection tool. Completed applications may be stored in the library for future use. Graphical User Interface screens shall be created in the same fashion. Data for the user displays is obtained by graphically linking the user display objects to the application objects to provide “real-time” data updates. Any real-time data value or object property may be connected to display its current value on a user display. Systems requiring separate software tools or processes to create applications and user interface displays shall not be acceptable.

Programming Methods

1) Provide the capability to copy objects from the supplied libraries, or from a user-defined library to the user’s application. Objects shall be linked by a graphical linking scheme by dragging a link from one object to another. Object links will support one-to-one, many-to-one, or one-to-many relationships. Linked objects shall maintain their connections to other objects regardless of where they are positioned on the page and shall show link identification for links to objects on other pages for easy identification. Links will vary in color depending on the type of link; i.e., internal, external, hardware, etc.

2) Configuration of each object will be done through the object’s property sheet using fill-in the blank fields, list boxes, and selection buttons. Use of custom programming, scripting language, or a manufacturer-specific procedural language for configuration will not be accepted.

3) The software shall provide the ability to view the logic in a monitor mode. When on-line, the monitor mode shall provide the ability to view the logic in real time for easy diagnosis



of the logic execution. When off-line (debug), the monitor mode shall allow the user to set values to inputs and monitor the logic for diagnosing execution before it is applied to the system.

4) All programming shall be done in real-time. Systems requiring the uploading, editing, and downloading of database objects shall not be allowed.

5) The system shall support object duplication within a customer’s database. An application, once configured, can be copied and pasted for easy re-use and duplication. All links, other than to the hardware, shall be maintained during duplication.

15.0 LonWorks NETWORK MANAGEMENT

The Graphical User Interface software (GUI) shall provide a complete set of integrated LonWorks network management tools for working with LonWorks networks. These tools shall manage a database for all LonWorks devices by type and revision, and shall provide a software mechanism for identifying each device on the network. These tools shall also be capable of defining network data connections between LonWorks devices, known as “binding”. Systems requiring the use of third party LonWorks network management tools shall not be accepted.

Network management shall include the following services: device identification, device installation, device configuration, device diagnostics, device maintenance and network variable binding.

The network configuration tool shall also provide diagnostics to identify devices on the network, to reset devices, and to view health and status counters within devices.

These tools shall provide the ability to “learn” an existing LonWorks network, regardless of what network management tool(s) were used to install the existing network, so that existing LonWorks devices and newly added devices are part of a single network management database.

The network management database shall be resident in the Network Area Controller (NAC) / Router, ensuring that anyone with proper authorization has access to the network management database at all times. Systems employing network management databases that are not resident, at all times, within the control system, shall not be accepted.

16.0 OBJECT LIBRARIES

A standard library of objects shall be included for development and setup of application logic, user interface displays, system services, and communication networks.

The objects in this library shall be capable of being copied and pasted into the user’s database and shall be organized according to their function. In addition, the user shall have the capability to group objects created in their application and store the new instances of these objects in a user-defined library.

In addition to the standard libraries specified here, the supplier of the system shall maintain an on-line accessible (over the Internet) library, available to all registered users to provide new or updated objects and applications as they are developed.

All control objects shall conform to the control objects specified in the BACnet specification.

The library shall include applications or objects for the following functions, at a minimum:

1) Scheduling Object- The schedule must conform to the schedule object as defined in the BACnet specification, providing 7-day plus holiday & temporary scheduling features and a



minimum of 10 on/off events per day. Data entry to be by graphical sliders to speed creation and selection of on-off events.

2) Calendar Object- The calendar must conform to the calendar object as defined in the BACnet specification, providing 12-month calendar features to allow for holiday or special event data entry. Data entry to be by graphical “point-and-click” selection. This object must be “linkable” to any or all scheduling objects for effective event control.

3) Duty Cycling Object- Provide a universal duty cycle object to allow repetitive on/off time control of equipment as an energy conserving measure. Any number of these objects may be created to control equipment at varying intervals

4) Temperature Override Object- Provide a temperature override object that is capable of overriding equipment turned off by other energy saving programs (scheduling, duty cycling etc.) to maintain occupant comfort or for equipment freeze protection.

5) Start-Stop Time Optimization Object- Provide a start-stop time optimization object to provide the capability of starting equipment just early enough to bring space conditions to desired conditions by the scheduled occupancy time. Also, allow equipment to be stopped before the scheduled un-occupancy time just far enough ahead to take advantage of the building’s “flywheel” effect for energy savings. Provide automatic tuning of all start / stop time object properties based on the previous day’s performance.

6) Demand Limiting Object- Provide a comprehensive demand-limiting object that is capable of controlling demand for any selected energy utility (electric, oil, and gas). The object shall provide the capability of monitoring a demand value and predicting (by use of a sliding window prediction algorithm) the demand at the end of the user defined interval period (1-60 minutes). This object shall also accommodate a utility meter time sync pulse for fixed interval demand control. Upon a prediction that will exceed the user defined demand limit (supply a minimum of 6 per day), the demand limiting object shall issue shed commands to either turn off user specified loads or modify equipment set points to effect the desired energy reduction. If the list of sheddable equipment is not enough to reduce the demand to below the set point, a message shall be displayed on the users screen (as an alarm) instructing the user to take manual actions to maintain the desired demand. The shed lists are specified by the user and shall be selectable to be shed in either a fixed or rotating order to control which equipment is shed the most often. Upon suitable reductions in demand, the demand-limiting object shall restore the equipment that was shed in the reverse order in which it was shed. Each sheddable object shall have a minimum and maximum shed time property to effect both equipment protection and occupant comfort.

The library shall include control objects for the following functions. All control objects shall conform to the objects as specified in the BACnet specification.

1) Analog Input Object - Minimum requirement is to comply with the BACnet standard for data sharing. Allow high, low and failure limits to be assigned for alarming. Also, provide a time delay filter property to prevent nuisance alarms caused by temporary excursions above or below the user defined alarm limits.

2) Analog Output Object - Minimum requirement is to comply with the BACnet standard for data sharing.

3) Binary Input Object - Minimum requirement is to comply with the BACnet standard for data sharing. The user must be able to specify either input condition for alarming. This object must also include the capability to record equipment run-time by counting the amount of time the hardware input is in an “on” condition. The user must be able to specify either input condition as the “on” condition.



4) Binary Output Object - Minimum requirement is to comply with the BACnet standard for data sharing. Properties to enable minimum on and off times for equipment protection as well as interstart delay must be provided. The BACnet Command Prioritization priority scheme shall be incorporated to allow multiple control applications to execute commands on this object with the highest priority command being invoked. Provide sixteen levels of priority as a minimum. Systems not employing the BACnet method of contention resolution shall not be acceptable.

5) PID Control Loop Object - Minimum requirement is to comply with the BACnet standard for data sharing. Each individual property must be adjustable as well as to be disabled to allow proportional control only, or proportional with integral control, as well as proportional, integral and derivative control.

6) Comparison Object - Allow a minimum of two analog objects to be compared to select either the highest, lowest, or equality between the two linked inputs. Also, allow limits to be applied to the output value for alarm generation.

7) Math Object - Allow a minimum of four analog objects to be tested for the minimum or maximum, or the sum, difference, or average of linked objects. Also, allow limits to be applied to the output value for alarm generation.

8) Custom Programming Objects - Provide a blank object template for the creation of new custom objects to meet specific user application requirements. This object must provide a simple BASIC-like programming language that is used to define object behavior. Provide a library of functions including math and logic functions, string manipulation, and e-mail as a minimum. Also, provide a comprehensive on-line debug tool to allow complete testing of the new object. Allow new objects to be stored in the library for re-use.

9) Interlock Object - Provide an interlock object that provides a means of coordination of objects within a piece of equipment such as an Air Handler or other similar types of equipment. An example is to link the return fan to the supply fan such that when the supply fan is started, the return fan object is also started automatically without the user having to issue separate commands or to link each object to a schedule object. In addition, the control loops, damper objects, and alarm monitoring (such as return air, supply air, and mixed air temperature objects) will be inhibited from alarming during a user-defined period after startup to allow for stabilization. When the air handler is stopped, the interlocked return fan is also stopped, the outside air damper is closed, and other related objects within the air handler unit are inhibited from alarming thereby eliminating nuisance alarms during the off period.

10) Temperature Override Object - Provide an object whose purpose is to provide the capability of overriding a binary output to an “On” state in the event a user specified high or low limit value is exceeded. This object is to be linked to the desired binary output object as well as to an analog object for temperature monitoring, to cause the override to be enabled. This object will execute a Start command at the Temperature Override level of start/stop command priority unless changed by the user.

11) Composite Object - Provide a container object that allows a collection of objects representing an application to be encapsulated to protect the application from tampering, or to more easily represent large applications. This object must have the ability to allow the user to select the appropriate parameters of the “contained” application that are represented on the graphical shell of this container.

The object library shall include objects to support the integration of devices connected to the Network Area Controller (NAC) / Router. At a minimum, provide the following as part of the standard library included with the programming software:



1) LonMark/LonWorks devices. These devices shall include, but not be limited to, devices for control of HVAC, lighting, access, and metering. Provide LonMark manufacturer-specific objects to facilitate simple integration of these devices. All network variables defined in the LonMark profile shall be supported. Information (type and function) regarding network variables not defined in the LonMark profile shall be provided by the device manufacturer.

2) For devices not conforming to the LonMark standard, provide a dynamic object that can be assigned to the device based on network variable information provided by the device manufacturer. Device manufacturer shall provide an XIF file, resource file and documentation for the device to facilitate device integration.

3) For BACnet devices, provide the following objects at a minimum:

a) Analog In

b) Analog Out

c) Analog Value

d) Binary

e) Binary In

f) Binary Out

g) Binary Value

h) Multi-State In

i) Multi-State Out

j) Multi-State Value

k) Schedule Export

l) Calendar Export

m) Trend Export

n) Device

4) For each BACnet object, provide the ability to assign the object a BACnet device and object instance number.

5) For BACnet devices, provide the following support at a minimum

a) Segmentation

b) Segmented Request

c) Segmented Response

d) Application Services

e) Read Property

f) Read Property Multiple

g) Write Property

h) Write Property Multiple

i) Confirmed Event Notification

j) Unconfirmed Event Notification



k) Acknowledge Alarm

l) Get Alarm Summary

m) Who-has

n) I-have

o) Who-is

p) I-am

q) Subscribe COV

r) Confirmed COV notification

s) Unconfirmed COV notification

t) Media Types

u) Ethernet

v) BACnet IP Annex J

w) MSTP

x) BACnet Broadcast Management Device (BBMD) function

y) Routing

17.0 DDE DEVICE INTEGRATION

The Network Area Controller / Router shall support the integration of device data via Dynamic Data Exchange (DDE), over the Ethernet Network. The Network Area Controller shall act as a DDE client to another software application that functions as a DDE server.

Provide the required objects in the library, included with the Graphical User Interface programming software, to support the integration of these devices into the BMS. Objects provided shall include at a minimum:

1) DDE Generic AI Object

2) DDE Generic AO Object

3) DDE Generic BO Object

4) DDE Generic BI Object

18.0 MODBUS SYSTEM INTEGRATION

The Network Area Controller / Router shall support the integration of device data from Modbus RTU, Ascii, or TCP control system devices. The connection to the Modbus system shall be via an RS-232, RS485, or Ethernet IP as required by the device.

Provide the required objects in the library, included with the Graphical User Interface programming software, to support the integration of the Modbus system data into the BMS. Objects provided shall include at a minimum:

1) Read/Write Modbus AI Registers

2) Read/Write Modbus AO Registers

3) Read/Write Modbus BI Registers



4) Read/Write Modbus BO Registers

All scheduling, alarming, logging and global supervisory control functions, of the Modbus system devices, shall be performed by the Network Area Controller.

The BMS supplier shall provide a Modbus system communications driver. The equipment system vendor that provided the equipment utilizing Modbus shall provide documentation of the system’s Modbus interface and shall provide factory support at no charge during system commissioning

19.0 OPC SYSTEM INTEGRATION

The Network Area Controller / Router shall act as an OPC client and shall support the integration of device data from OPC servers. The connection to the OPC server shall be Ethernet IP as required by the device. The OPC client shall support third party OPC servers compatible with the Data Access 1.0 and 2.0 specifications.

Provide the required objects in the library, included with the Graphical User Interface programming software, to support the integration of the OPC system data into the BMS. Objects provided shall include at a minimum:

1) Read/Write OPC AI Object

2) Read/Write OPC AO Object

3) Read/Write OPC BI Object

4) Read/Write OPC BO Object

5) Read/Write OPC Date/Time Input Object

6) Read/Write OPC Date/Time Output Object

7) Read/Write OPC String Input Object

8) Read/Write OPC String Output Object

All scheduling, alarming, logging and global supervisory control functions, of the OPC system devices, shall be performed by the Network Area Controller / Router.

The BMS supplier shall provide an OPC client communications driver. The equipment system vendor that provided the equipment utilizing OPC shall provide documentation of the system’s OPC server interface and shall provide factory support at no charge during system commissioning.

20.0 GRAPHICAL USER INTERFACE COMPUTER HARDWARE (DESKTOP)

The browser workstation shall be an Intel Pentium based computer (minimum processing speed of 2.4 Ghz with 1.0 GB RAM and a 100-gigabyte minimum hard drive). It shall include a DVD-ROM/CD-RW Combination Drive, 2-parallel ports, 2-asynchronous serial ports and 2-USB ports. A minimum 17”flat panel color monitor, 1280 x 1024 optimal preset resolution, 25 ms response time, shall also be included.

Connection to the BMS network shall be via an Ethernet network interface card, 10 Mbps.

A system printer shall be provided. Printer shall be laser type with a minimum 600 x 600-dpi resolution and rated for 8 PPM print speed minimum.



OTHER CONTROL SYSTEM HARDWARE FIELD DEVICES 1.0 ELECTRIC AND ELECTRONIC CONTROLS RELATED EQUIPMENT

General Requirements

All controls shall be capable of operating in ambient conditions varying between 0-55 deg. C and 90% R.H. non-condensing.

All Control devices shall have a 20 mm conduit knockout. Alternatively, they shall be supplied with adaptors for 20 mm conduit.

Ancillary Items

When items of equipment are installed in the situations listed below, the BAS contractor shall include the following ancillary items :

(i) Weather Protection

All devices required to be weatherproofed are detailed in the Schedule of Quantities. IP ratings for the equipment is mentioned in the respective section.

(ii) Pipework Immersion

Corrosion resisting pockets of a length suitable for the complete active length of the device, screwed ½” (13 mm) or ¾” (20 mm) NPT suitable for the temperature, pressure and medium.

(iii) Duct Mounting (Metal or Builders Work)

Mounting flanges, clamping bushes, couplings, locknuts, gaskets, brackets, sealing glands and any special fittings necessitated by the device.

Additional features

(i) Concealed Adjustment : All two position switching devices shall have concealed

adjustment unless detailed otherwise in the Schedule of Quantities.

(ii) Operating Voltage : All two position switching devices shall operate on 230 v a.c and all accessible live parts shall be shrouded. An earth terminal shall be provided.

2.0 TEMPERATURE SENSOR

Temperature sensors for space, pipes and ducts, shall be of the Resistance Temperature detector (RTD) type or thermistor. These shall be two wire type and shall conform to the following specifications :



1) Immersion sensors shall be high accuracy type with a high resistance versus temperature change. The accuracy shall be atleast ± 0.33 degrees F and sensitivity of atleast 2 ohm/F.

2) Immersion sensors shall be provided with separate stainless steel thermo well. These

shall be manufactured from bar stock with hydrostatic pressure rating of atleast 10 kgf/cm2.

3) The connection to the pipe shall be screwed ¾ inch NPT (M). An aluminum sleeve shall

be provided to ensure proper heat transfer from the well to the sensor. Terminations to be provided on the head. Flying leads shall not be acceptable.

4) The sensor housing shall plug into the base so that the same can be easily removed

without disturbing the wiring connections. 5) Duct temperature sensors shall be with rigid stem and of averaging type. These shall be

suitable for duct installation. 6) Outdoor air temperature sensor shall be provided with a sun shield. 7) The sensors shall not be mounted near any heat source such as windows, electrical

appliances etc.

The temperature sensors may be of any of the following types :

1) PT 100, PT 1000, PT 3000 2) NI 100, NI 1000 3) Balco 500. 4) Thermistor

3.0 HUMIDITY SENSOR

Space and duct humidity sensors shall be of capacitance type with an effective sensing range of 10% to 90% RH. Accuracy shall be + 3% or better. Duct mounted humidity sensors shall be provided with a sampling chamber. Wall mounted sensors shall be provided with a housing. The sensor housing shall plug into the base so that the same can be easily removed without disturbing the wiring connections. The sensors shall not be mounted near any heat source such as windows, electrical appliances etc.

4.0 FLOW METER

Water flow meters shall be either Ultrasonic type or electromagnetic type. For electromagnetic flow meter, teflon lining with 316 SS electrodes must be provided. The housing shall have IP 55 protection. Vendors shall have to get their design/ selection approved by the Consultant, prior to the supply.

The exact ranges to be set shall be determined by the contractor at the time of commissioning. It should be possible to ‘zero’ the flowmeter without any external instruments, with the overall accuracy of atleast ± 1% full scale.



5.0 PRESSURE TRANSMITTER FOR WATER

Pressure transmitters shall be piezo-electric type or diaphragm type. (Bourdon Tube type shall not be acceptable). Output shall be 4-20mA or 0-10V DC and the range as specified in the data sheet depending on the line pressure. Power supply shall be either 24 V AC, 24 V DC or 230 V AC. Connection shall be as per manufacturer’s standards. The pressure detector shall be capable of withstanding a hydraulic test pressure of twice the working pressure. The set point shall fall within 40%-70% of the sensing range and detector shall have sensitivity such that change of 1.5% from the stabilized condition shall cause modulation of the corrective element. The sensor must be pressure compensated for a medium temperature of -10 o C to 60o C with ambient ranging between 0 o C to 55 o C.

6.0 DIFFERENTIAL PRESSURE SWITCH FOR PIPE WORK

These shall be used to measure pressure differential across suction and discharge of pumps. The range shall be as specified in the data sheet. Switch shall be ON with increase in differential. Housing for these shall be weather proof with IP 55 protection. The pressure switch shall be capable of withstanding a hydraulic test pressure of 1.5 times the working pressure. The set point shall fall in 40-70% of the scale range and shall have differentials adjustable over 10%-30% of the scale range. The switches shall be provided with site adjustable scale and with 2 NO/NC contacts.

7.0 DIFFERENTIAL PRESSURE SWITCH FOR AIR SYSTEMS

These shall be diaphragm operated. Switches shall be supplied with air connections permitting their use as static or differential pressure switches.

The switch shall be of differential pressure type complete with connecting tube and metal bends for connections to the duct. The housing shall be IP 54 rated. The pressure switches shall be available in minimum of 3 ranges suitable for applications like Air flow proving, dirty filter, etc. The set point shall be concealed type. The contact shall be SPDT type with 230 VAC, 1 A rating.

The switch shall be supplied suitable for wall mounting on ducts in any plane. It should be mounted in such a way that the condensation flow out of the sensing tips. Proper adaptor shall be provided for the cables.

The set point shall fall within 40%-70% of the scale range and l has differentials adjustable over 10%-30% of the scale range.

The switches shall be provided with site adjustable scale and with 2 NO/NC contacts. 8.0 AIR FLOW SWITCHES

Air flow switches shall be selected for the correct air velocity, duct size and mounting attitude. If any special atmospheric conditions are detailed in the Schedule of Quantity the parts of the switches shall be suitably coated or made to withstand such conditions.



These shall be suitable for mounting in any plane. Output shall be 2 NO/NC potential free. Site adjustable scale shall also be provided.

9.0 AIR PRESSURE SENSOR

The pressure sensor shall be differential type. The construction shall be spring loaded diaphragm type. The movement of the membrane in relation to the pressure should be converted by an inductive electromagnet coupling which would give an output suitable for the controller. The pressure sensor shall be in a housing having IP 54 ratings in accordance with IEC 529. Suitable mounting arrangement shall be available on the sensor. The sensor shall come complete with the PVC tubes & probes.

10.0 WATER FLOW SWITCH

These shall be paddle type and suitable for the type of liquid flowing in the line. Output shall be 2NO/2NC potential free.

11.0 TRANSDUCERS FOR ELECTRICAL SERVICES

Electrical transducers shall be integrated electronic type and rack mounted on the field. These shall work on 230 V supply with the output being standard type i.e. 4-20 mA, 0- 10 Volts etc.

Power factor, Voltage, Current, Frequency and Kilowatt transducers shall have standard output signal for measurement for the specified variable.

Kilowatt-Hour metering (if any) shall be poly-phase; three- element with current transformer (CT) operated type. The metering shall feature high accuracy with no more than +/- 1% error over the expected load range. The coils shall be totally encapsulated against high impulse levels.

12.0 LEVEL SWITCH The level switches shall have to meet the following requirement : Type : Float Type/Capacitance type/Conductivity type Mounting : To suit application. Connection : Flanged ANSI 150 lbs RF Carbon steel Float material : 316 SS Stem Material : 316 SS Output : 2 NO, 2 NC potential free

Switch Enclosure : IP 55 13.0 DIGITAL THERMOSTATS

Thermostats for FCU’s should be Digital on/off OR Modulating Type for Actuating 2 way or 3 way Valves (On-off/Modulating)



Thermostats should display Room Temp and Setpoint simultaneously which is easy to read from atleast 6-8 feet distance.

Thermostats should have Fan Speed Control Switch (Low-Med-High-Auto). Auto Mode should be able to save energy by automatically reducing the Fan Speed when Room Temp Achieves Set Point.

LCD Display should be available in Blue or Green Backlit for ease in viewing the Room Temperature and Setpoint.

Thermostats should work on 230V PS for on-off models and 24V for Modulating Thermostats

The User Settings should be retained in Thermostat Memory in case of Power Failure

The Switching Relays should be separately wired and should be mounted inside the Junction Box, so that the Thermostat front is sleek in mounting. Thermostat Thickness should be 17mm or less

Thermostats should have Energy Savings Feature with dual setpoint which can be interlocked with Occupancy Sensor or Hotel Key Card input. This should be indicated in the LCD Display in the mode it is being operated. This Programming should be possible by Hotel maintenance Staff.

Thermostats should be similar or equivalent to Honeywell Halo Series Digital Thermostats Model T6861 (on/off) or T6865 (modulating) version.

14.0 Pressure Independent Dynamic Balancing Valve (ranges from25mm to 150mm)

The Valve should have self Dynamic Flow Control Valves that are pressure independent, two way, Modulating to accept digital/analog input BMS/Controller signals and should provide position feedback signal to the control system. The Feedback signal should have the feedback feature of the Valve / Actuator itself without any need of any additional accessory/ instrument/ device.

PICV should be capable of maintaining the max flow rate atleast +/-4% Accuracy The PICV Should be capable of maintaining Linear Temperature Control, Pressure

Independence and Electric Modulation in one Valve body. The Flow rates should be field settable electronically upto 60% of the valve Max set Flow

rate The Differential Pressure Ranges for which the valve can maintain the flow rates should be

mentioned in the Product literature

Valve Actuator housing shall be rated to IP54 Actuator shall be driven by a 24Vac power supply and shall accept universal Input signals

like 0/2-10Vdc or 4-20mA signal Actuator shall be capable of providing feedback Signal of 0/2-10Vdc to the Control

System/BMS PICV should have an option for adjusting the Flow Characteristics as per AHU in every PICV

to ensure Linear Temp Control.



PICV should have an option for changing the Max Flow Rates in future and no additional Instrument should be required. Flow Values can be changed by entering in LCD Display only and not by any DIP Switches or Setting Dial to improve accuracy.

PICV shall provide full valve Authority PICV Valve body shall be rated at least PN16 Max Close off Pressure shall be mentioned in the Product Datasheet. Min Working Differential Pressure shall be 30Kpa Valve shall be Internal BSP Threaded from DN25 to DN50 and Flanged end Connection for

DN65 to DN150 Min Stroke Length of the Valve shall be 20mm Media Temperature : 0-130 deg C Valve shall be of Brass/Bronze Construction upto DN50 and Cast Iron upto DN150 Shut off Leakage shall be 0.1 Kvs

15.0 MOTORIZED BUTTERFLY VALVE

Valve Body Type of Valve : Butterfly Valve Body Material : Cast Iron or Ductile Iron Body Disc Material : Nickel plated Ductile Iron Stem : SS416 Liner Material : EPDM Nominal Static Body Rating : PN16 Tightness : Bubble Tight Medium Temperature : -10 dec C to 120 deg C Pipe Connection : ISO7005-2

Actuator Type : Electric Motor Supply : 230 Vac, 50hz/60Hz Travel Angle : 90 deg +/- 5 deg Enclosure : IP67 Waterproof Indicator : Continuous Position Indicator Space Heater : 15W 220V Anti Condensation Stall Protection : Built-in thermal protection Cut off at 125 ± 5

Reset at 95 ± 5 Manual Override : By Handwheel, nonclutch design Torque Limit Switches : 2 nos. External Coating : Dry Aluminium Alloy in Painted Black Make : Honeywell

16.0 ON/OFF TYPE FCU VALVES

Two way on/off type FCU valve

The two way FCU valve should be design in such a way that it can withstand a static pressure of 20 bar and a burst pressure of 100 bar.



The ports are designated in such a way that flow through the two way valve can be in either direction.

The valve shall be designed to handle the fluid temperature from1degreeC to 95O C

It can withstand the differential pressure upto 4 Bar.

The valve is of bronze body with stainless steel stem and Noryl cover.

The FCU valve shall have a minimum stroke length of 10mm so that it has the sufficient distance to travel.

The hydronic FCU valves shall been designed to meet the European standard EN 60730-2-8.

The actuator shall require the power supply of 220 Volts AC so that no transformer is required.

The actuator is easily removable from the valve so that in case the actuator fails at site it can be easily replaced without affecting the integrity of the water system.

The actuator shall have the provision to operate manually.

The actuator shall meet the low voltage directive 73/23/EEC. The actuator shall be selected in such a way that the maximum power consumed by the actuator is 6 Watt.

The valve should be similar or equivalent to Honeywell VC6013 version.

17.0 SNAP ACTING DIGITAL THERMOSTATS

Thermostats for FCU’s should be Digital on/off for Actuating 2 way or 3 way Valves (On-off/Modulating)

Thermostats should display Room Temp and Set point simultaneously which is easy to read from at least 6-8 feet distance.

Thermostats should have Fan Speed Control Switch (Low-Med-High-Auto). Auto Mode should be able to save energy by automatically reducing the Fan Speed when Room Temp Achieves Set Point.

LCD Display should be available in Blue or Green Backlit for ease in viewing the Room Temperature and Set point.

Thermostats should work on power supply of 230V for on-off models.

The User Settings should be retained in Thermostat Memory in case of Power Failure

The Switching Relays should be separately wired and should be mounted inside the Junction Box, so that the Thermostat front is sleek in mounting. Thermostat Thickness should be 17mm or less.



Thermostats should have Energy Savings Feature with dual set point which can be interlocked with Occupancy Sensor or Hotel Key Card input. This should be indicated in the LCD Display in the mode it is being operated. This Programming should be possible by Hotel maintenance Staff.

Thermostats should be similar or equivalent to Honeywell Halo Series Digital Thermostats Model T6861 (on/off) version.



PART – III: EXECUTION: 1.0 INSTALLATION

All work described in this section shall be performed by system integrators or contractors that have a successful history in the design and installation of integrated control systems. Install system and materials in accordance with manufacturer’s instructions, and as detailed on the project drawing set. Drawings of the BMS network are diagrammatic only and any apparatus not shown, but required to make the system operative to the complete satisfaction of the Architect shall be furnished and installed without additional cost. Line and low voltage electrical connections to control equipment shown specified or shown on the control diagrams shall be furnished and installed by this contractor in accordance with these specifications. Equipment furnished by the HVAC Contractor that is normally wired before installation shall be furnished completely wired. Control wiring normally performed in the field will be furnished and installed by this contractor.

2.0 WIRING:

All electrical control wiring and power wiring to the control panels, NAC, computers and network components shall be the responsibility of the this contractor. The electrical contractor shall furnish all power wiring to electrical starters and motors. All wiring shall be in accordance with the Project Electrical Specifications, the National Electrical Code and any applicable local codes. All BMS wiring shall be installed in the conduit types specified in the Electrical Specifications unless otherwise allowed by the National Electrical Code or applicable local codes. Where BMS plenum rated cable wiring is allowed it shall be run parallel to or at right angles to the structure, properly supported and installed in a neat and workmanlike manner.

3.0 WARRANTY

Equipment, materials and workmanship incorporated into the work shall be warranted for a period of one year from the time of system acceptance. Within this period, upon notice by the CLIENT, any defects in the work provided under this section due to faulty materials, methods of installation or workmanship shall be promptly (within 48 hours after receipt of notice) repaired or replaced by this contractor at no expense to the CLIENT.

4.0 WARRANTY ACCESS

The CLIENT shall grant to this contractor, reasonable access to the BMS during the warranty period.



The CLIENT shall allow the contractor to access the BMS from a remote location for the purpose of diagnostics and troubleshooting, via the Internet, during the warranty period.

5.0 SOFTWARE LICENSE

CLIENT shall be the named license holder of all software associated with any and all incremental work on the project(s). The owner, or his appointed agent, shall determine which organizations to be named in the “orgid” of all software licenses. CLIENT, or his appointed agent, shall be free to direct the modification of the “orgid” in any software license, regardless of supplier. The owner, or his appointed agent, shall receive ownership of all job specific software configuration documentation, data files, and application-level software developed for the project. This shall include all custom, job specific software code and documentation for all configuration and programming that is generated for a given project and /or configured for use within based controllers and/or servers and any related LAN / WAN / Intranet and Internet connected routers and devices. Any and all required Ids and passwords for access to any component or software program shall be provided to the owner.

6.0 ACCEPTANCE TESTING

Upon completion of the installation, this contractor shall load all system software and start-up the system. This contractor shall perform all necessary calibration, testing and de-bugging and perform all required operational checks to insure that the system is functioning in full accordance with these specifications. This contractor shall perform tests to verify proper performance of components, routines, and points. Repeat tests until proper performance results. This testing shall include a point-by-point log to validate 100% of the input and output points of the DDC system operation. Upon completion of the performance tests described above, repeat these tests, point by point as described in the validation log above in presence of CLIENT's Representative, as required. Properly schedule these tests so testing is complete at a time directed by the CLIENT's Representative. Do not delay tests so as to prevent delay of occupancy permits or building occupancy. System Acceptance: Satisfactory completion is when BMS contractor have performed successfully all the required testing to show performance compliance with the requirements of the Contract Documents to the satisfaction of CLIENT Representative. System acceptance shall be contingent upon completion and review of all corrected deficiencies.

7.0 OPERATOR INSTRUCTION, TRAINING

During system commissioning and at such time acceptable performance of the BMS hardware and software has been established this contractor shall provide on-site operator instruction to the owner's operating personnel. Operator instruction shall be done during normal working hours and shall be performed by a competent representative familiar with the system hardware, software and accessories. This contractor shall provide 40 hours of instruction to the CLIENT's designated personnel on the operation of the BMS and describe its intended use with respect to the programmed



functions specified. Operator orientation of the systems shall include, but not be limited to; the overall operation program, equipment functions (both individually and as part of the total integrated system), commands, systems generation, advisories, and appropriate operator intervention required in responding to the System's operation. The training shall be in three sessions as follows: 1) Initial Training: One day session (8 hours) after system is started up and at least one week

before first acceptance test. Manual shall have been submitted at least two weeks prior to training so that the owners' personnel can start to familiarize themselves with the system before classroom instruction begins.

2) First Follow-Up Training: Two days (16 hours total) approximately two weeks after initial

training, and before Formal Acceptance. These sessions will deal with more advanced topics and answer questions.

3) Warranty Follow Up: Two days (16 hours total) in no less than 4 hour increments, to be

scheduled at the request of the owner during the one year warranty period. These sessions shall cover topics as requested by the owner such as; how to add additional points, create and gather data for trends, graphic screen generation or modification of control routines.

PART – IV IO SUMMARY

DATA POINT SUMMARY - RMLA, Lucknow

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Sr. No. Description AI DI AO DO By IBMS Contractor By 3rd Party Contractors

A Chiller with VFD (5 nos )

Bacnet / Modbus Interface License

HVAC Vendor to provide RS 485 MODBUS / Bacnet interface in each chiller. HVAC Vendor to show the parameters on the MODSCAN /Bacstack/Cimetrics software before integrating to IBMS. All mapping details & the Master/slave ID setting in the Chillers to be done by the HVAC Contractor

1 Chillers - ON / OFF

5

Potential Free Contact from BMS to Chiller MCC panel

Acceptance of Potential Free Output in Chiller Panel

2 Chiller run status 5

Potential Free Contact to BMS from Chiller MCC panel

Potential Free Contact in Chiller Panel

3 Chiller Auto / Manual switch 5



4 Chillers Trip / Fault 5






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5 CHW supply / return temp. 10

Immersion temperature sensor

Suitable Insertion Provision in Water Line 10

6 Common Header CDW supply / return temp. 2



7 Common Header CHW supply / return temp. 2



8 Ambient Temperature & Humidity 2

Ambient temp/Humidity sensor

1

9 Chiller isolation Mortised valves ON/OFF command & status. 10 10

Potential Free Contact from BMS to motorised butter fly valve with limit switch for position status.

Butterfly Valves

10 Flow Metering 2

Flow Meter Suitable Insertion Provision in Water Line 2

11 Chilled Water Flow Status 5

Suitable insertion provision


B Primary Chilled Water Pumps (6 Nos )

1 Pump ON / OFF

6

Potential Free Contact from BMS to Pump Starter panel

Acceptance of Potential Free Output in Pump Panel




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2 Pump run status 6

Differential Switch across Pumps


3 Pump Auto / Manual switch status 6

Potential Free Contact at Auto/Manual Switch

Potential Free Contact in Pump Panel

4 CHW pump trip status. 6

Signal from potential free contact.


C Secondary Chilled Water Pumps (7 Nos)

1 Pump ON / OFF

7



2 Pump run status 7

Differential Switch across Pumps


3 Pump Auto / Manual switch status 7



4 VFD Speed Control 7

0-10 Vdc from BMS to VFD

Acceptance of 0-10 Vdc in VFD

5 VFD Speed Feedback 7

0-10 Vdc from VFD Provision of 0-10 Vdc in VFD for Speedfeed back

6 Differential pressure sensor across Pump 7

Differential Pressure Sensor





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7 VFD Trip Status 7


Potential Free Contact in VFD

8 CHW pump trip status. 7



D Condenser Water Pumps - (6 Nos.)

1 Condenser Water pump ON / OFF Command.

6



2 Condenser Water pump ON / OFF status.

6

Differential pressure switch across the CHW pumps for ON/OFF status.

Suitable Insertion Provision in Water Line

6

3 Condenser Water pump Auto / Manual status. 6

Signal from A/M switch.


4 Condenser Water pump trip status. 6



E Cooling Tower - 5 Nos. 1 Cooling Tower sump

outlet temperature. 5 Imm type temp sensor.

5

2 Cooling Tower fan ON/OFF command. 10

Potential Free Contact from BMS to CT Starter panel

Acceptance of Potential Free Output in CT Panel




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3 Cooling Tower fan trip status. 10


Potential Free Contact in CT Panel






6 Cooling Tower fan Auto/ Manual status. 10


Potential Free Contact in CT Panel

7 Sump level monitoring low 5

Signal from level switch

Suitable Insertion Provision in Cooling Tower 5

8 Cooling Tower run Status 10

Potential Free Contact to BMS from panel

Potential Free Contact in Panel

Sub Total (A+B+C+D+E) 47 129 17 44

19 1 5 19 0 0 0 7 0 0 0 0 5 2

F Air Handling Units With VFDs - 92 Nos

1 AHU ON/OFF 92

Potential Free Contact from BMS to fan Starter panel

Acceptance of Potential Free Output in AHU Panel

2 AHU Air Flow status 92

Differential Switch across Fans

Suitable Insertion Provision in AHU 92

3 AHU Auto / Manual status 92


Potential Free Contact in AHU Panel




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4 AHU filter status 92

Differential Pressure Switch across filter







7 VFD Trip Status 92



8 Duct Pressure Monitoring 92 Duct Pressure Sensor 92

9 Return Air Temperature 92

Duct Temperature Sensor


10 Motorised Valve Cooling 92

0-10 V DC Signal 2 / 3 Way Control Valve by HVAC, with acceptance of 0-10 V DC Signal

11 IAQ Sensor on Return Air 92

IAQ Sensor Suitable Insertion Provision in AHU 92

12 Fresh Air Damper Status / Control

92 92

0-10 V DC Signal Motorised Damper By HVAC, with acceptance of 0-10 V DC Signal

13 Rellief air Damper status / Control 92 92 0-10 V DC Signal Motorised Damper By HVAC, with

acceptance of 0-10 V DC Signal

Sub Total (F) 552 368 368 92 0 0 0 0 184 92 92 0 0 92 0 0 0 0 G TFA's with VFD - 30 Nos.




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1 TFA ON/OFF 30



2 TFA Air Flow status 30



3 TFA Auto / Manual status 30



4 TFA filter status 30












9 Supply Air Temperature 30

Duct Temperature Sensor


10 Motorised Valve Cooling

30

0-10 V DC Signal 2 / 3 Way Control Valve by HVAC, with acceptance of 0-10 V DC Signal

Sub Total (G) 90 120 60 30 0 0 0 0 60 30 30 0 0 0 0 0 0 0 H HRW AHU's with VFD - 7

Nos.




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1 HRW AHU'S ON/OFF 14



2 HRW AHU'S Air Flow status 14



3 HRW AHU'S Auto / Manual status 14



4 HRW AHU'S filter status 7



5 Air Temperature 7

Duct Temperature Suitable Insertion Provision in AHU 7










Sub Total (H) 28 49 7 14 0 0 0 0 21 7 14 0 0 0 0 0 0 0 I Liftwell Pressurization

Fans - 17 Nos.

1 Fan ON/OFF 17



2 Fan Air Flow status 17






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3 Fan Auto / Manual status 17



Sub Total (I) 0 34 0 17 0 0 0 0 17 0 0 0 0 0 0 0 0 0 J Ventillation Fans

without VFD - 205 Nos

1 Fan ON/OFF 205



2 Fan Air Flow status 205



3 Fan Auto / Manual status 205



4 Fan Trip Status 205



5 CO Sensor 90


Potential Free Contact in VFD 90

Sub Total (J) 90 615 0 205 0 0 0 0 205 0 0 0 0 0 90 0 0 0 0 L Hot Water Generator - 2

Nos

1 Boiler Start/Stop Command 2

Potential Free Contact from BMS to Starter panel

Acceptance of Potential Free Output in Panel

2 Boiler on/off status 2

Potential Free Contact at Panel





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3 Boiler Auto / Manual switch 2



4 Boiler Trip / Fault status 2



5 Water In & Out Temperature 4



6 Boiler run status 2 Potential Free Contact to BMS from panel


7 Bolier isolation Mortised valves ON/OFF command & status. 2 2

Potential Free Contact from BMS to motorised butter fly valve with limit switch for position status.

Butterfly Valves

Sub Total (L) 4 10 0 4 4 0 0 0 0 0 0 0 0 0 0 0 0 0 M Fire Fighting System 1 Hydrant pressure

monitoring 1 Pressure Sensor Suitable Insertion Provision in Water

Line 1

2 Sprinkler pressure monitoring 3

Pressure Sensor Suitable Insertion Provision in Water Line 3

3 Jockey Pump run status 1



4 Sprinkler Pump run status 1



5 Fire Pump Run Status (Electrically driven) 1



6 Fire Pump Run Status (Diesel driven) 1






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Sub Total (M) 4 4 0 0 0 0 0 0 0 0 0 0 4 0 0 0 0 0 N Water Supply System 1 Water Tank High / Low

Level 20 Level Switch Suitable Insertion Provision

10

2 Domestic Water Transfer Pump On/Off Control

2 Potential Free Contact to BMS from fan Starter panel


3 Domestic Water Transfer Pump Auto/Manual Status

2 Potential Free Contact to BMS from fan Starter panel


4 Domestic Water Transfe Pump run status 2

Potential Free Contact to BMS from fan Starter panel


5 Filter Feed Pump On/Off Control 2



6 Filter Feed Pump Auto/Manual Status 2



7 Filter Feed Pump run status 2



8 Sump Pump On/Off Control 8



9 Sump Pump Auto/Manual Status 8






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10 Sump Pump run status 8



11 Soft Water Pump Auto/Manual Status 2



12 Soft Water Pump run status 2



13 STP Pumps Run status 10



Sub Total (N) 0 58 12 0 0 10 0 0 0 0 0 0 0 0 0 0 0 O Electrical System - HT

Panels , LT Panels

1 HT / LT Breaker Phase Voltage Monitoring (8 Nos.)

Through Modbus Output of Multi data meters

Provision of suitable rating PT in Panel

2 HT / LT Breaker Phase Current Monitoring (35 Nos.)

Provision of suitable rating CT in Panel

3 HT / LT Breaker Frequency Monitoring (4 Nos.)

Provision of suitable rating CT/PT in Panel

4 HT / LT Breaker KW Monitoring (24 Nos.)


5 HT / LT Breaker KWH Monitoring (35 Nos.)





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6 HT / LT Breaker On/Off status 40


7 Bus Coupler On/Off Status 2


8 HT / LT Breaker Trip Status 40


Sub Total (O) 0 82 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 P Diesel Generator

Integration through Modbus Protocol

DG Panel vendor to provide RS 485 MODBUS RTU. The electrical vendor to show the parameters on the MODSCAN software before integrating to IBMS. All mapping details & the Master/slave ID setting in the meter to be done by the DG vendor

1 DG Start/Stop Stauts 4

Potential Free Contact from BMS to DG Starter panel

2 DG AMF Breaker Status 4

Potential Free Contact from BMS to DG Starter panel

3 Bulk Storage Tank level Monitoring 1

Flame Proof Level Transmitter

1

4 Flow Meter at Inlet & Outlet of Bulk Storage Tank

2 Flow Meter of 75 mm

2

5 Flow Meter at Inlet of Day oil Tank 4

Flow Meter of 25 mm 4




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6 DG Oil Day Tank Level 4

Flame Proof Level Transmitter

4

Sub Total (P) 11 8 0 0 0 0 0 0 0 0 0 0 0 0 6 5 0 0 Q VFDs - on Modbus RTU

/ Bacnet Integration of VFDs through Modbus Protocol / Bacnet

R VAV - 89 on Bacnet IP

Integration of VAV through Bacnet IP

S BTU Meter - 72 Nos. on M-BUS

Integration of BTU Meter through M-BUS

T Fire Alarm System

Integration of FAS through Modbus/Bacnet/OPC Protocols of all devices/detectors

Grand Total (A to T) 826 1477 452 418 23 1 15 19 487 129 136 7 4 92 90 6 5 5 2

III) ELECTRICAL SYSTEM:

I. SCOPE

The scope of this section comprises of fabrication, supply, erection, testing and commissioning of Motor Control Centre (MCC), wiring and cable tray of all air-conditioning equipment, components and accessories.

A) GENERAL The electrical Installation work shall be carried out in accordance with Indian Standard Code

of Practice. It shall also be in conformity with the current Indian Electricity rules and regulations and requirements of the Local Electricity Supply Authority and Fire Insurance regulations so far as these becomes applicable to the installation. Electrical work in general shall be carried out as per following CPWD Specifications.

General Specifications for Electrical Works.

- Part -I - Internal Work - 2007.

- Part -II - External Work - 1995/Latest.

- Part -IV - Substation Work - 2007. Wherever this specifications calls for a higher standard of material and or workmanship than

those required by any of the above mentions regulations and specification then the specification here under shall take precedence over the said regulations and standards.

B) CABLES & CABLE TRAY 1.0 STANDARDS OF CODES This chapter covers the specifications for supply and laying of Medium Voltage XLPE

insulated PVC sheathed FRLS cables for 1100 volts. All equipments, components, materials and entire work shall be carried out in conformity

with applicable and relevant Bureau of Indian Standards and Codes of Practice, as amended upto date. In addition, relevant clauses of the Indian Electricity Act 1910 and Indian Electricity Rules 1956 as amended upto date shall also apply. Wherever appropriate Indian Standards are not available, relevant British and /or IEC Standards shall be applicable.

2.0 CABLES Medium voltage cables shall be aluminium conductor XLPE insulated, PVC sheathed FRLS

armoured conforming to latest IS. Cables shall be rated for a 1100 Volts.

RAM MANOHAR LOHIA ACADEMY AT LUCKNOW HVAC:TS-170

HVAC Works : Technical Specifications Envirotech Design Pvt. Ltd.

All Conductor cables shall be as per BOQ. Conductors shall be insulated with high quality XLPE base compound. A common covering

(bedding) shall be applied over the laid up cores by extruded sheath of unvulcanised compound. Armouring shall be applied below outer sheath of PVC sheathing. The outer sheath shall bear the manufacturer’s name and trade mark at every meter length. Cores shall be provided with following colour scheme of PVC insulation.

1 Core : Red/Black/Yellow/Blue 2 Core : Red and Black 3 Core : Red, Yellow and Blue 3 ½ /4 Core : Red, Yellow, Blue and Black 3.0 LAYING Cables shall be laid as per the specifications given below : 3.1 Duct system

Wherever specified such as road crossing, entry to building or in paved area etc. cables shall be laid in underground ducts. The duct system shall consists of a required number of stone ware pipes, GI, CI or spun reinforced concrete pipe with simplex joints and all the jointing work shall be done according to the CPWD building specifications or as per the instructions of the Engineer-In-Charge as the case may be. The size of the pipe shall not be less than 100mm in diameter for a single cable and shall not be less than 150mm for more than one cable and so on. The pipe shall be laid directly in ground without making any special bed but wherever asbestos cement pipes are used, the pipes shall be encased in concrete of 75mm thick. The ducts shall be properly anchored to prevent any movement. The top surface of the cable ducts shall not be less than 60 cm. below the ground level. The ducts shall be laid a gradient of at least 1:300. The duct shall be provided manholes of adequate size at regular intervals for drawing the cables. The manhole cover and frame shall be of cast iron and machine finished to ensure a perfect joint. The manhole covers shall be installed flush with the ground or paved surfaces. The duct entry to the manholes shall be made leak proof with lead-wool joints. The ducts shall be properly plugged at the ends to prevent entry of water, rodents, etc. Suitable duct markers shall be placed along the run of the cable ducts. The duct markers shall at least be 15 cm. square embedded in concrete, indicating duct. Suitable cable supports made of angle iron shall be provided in the manholes for supporting the cables. Proper identification tags shall be provided for each cable in the manholes.

3.2 Cables in outdoor trenches Cable shall be laid in outdoor trenches wherever called for. The depth of the trenches shall not be less than 75cm from the final ground level. The width of the trenches shall not be less than 45 cm. However, where more than one cable is laid, an axial distance of not less than 15 cm. shall be allowed between the cables. The trenches shall be excavated in reasonably straight line with vertical side walls and with uniform depth. Wherever there is a change in direction suitable curvature shall be provided complying with the requirements. Suitable shoring and propping may be done to avoid caving in of trench walls. The bottom of the trench shall be level and free from stone brick bats etc. The trench shall then be provided with a layer of clean, dry sand cushion of not less than 8 cm. in depth. The cable shall be pulled over rollers in the trench steadily and uniformly without jerks and strains. The entire cable length shall as far as possible be paved of in one stretch. However where this is not possible the remainder of the cable may be removed by "Flaking" i.e. by



making one long loop in the reverse direction. After the cable has been uncoiled and laid into the trench over the rollers, the cable shall be lifted slightly over the rollers beginning from one end by helpers standing about 10 mtrs. apart and drawn straight. The cable should then be taken off the rollers by additional helpers lifting the cable and then laid in a reasonably straight line. For short cut runs and sizes upto 50 sq.mm of cables upto 1.1 KV grade any other suitable method of direct handling and laying can be adopted with the prior approval of the Engineer-in-charge. When the cable has been properly straightened, the cores are tested for continuity and insulation resistance and the cable length then measured. The ends of all cables shall be sealed immediately. In case of PVC cables suitable moisture seal tape shall be used for this purpose. Cable laid in trenches in a single tier formation shall have a covering of clean, dry sand of not less 17 cms above the base cushion of sand before the protective cover is laid. In the case of vertical multi tier formation after the first cable has been laid, a sand cushion of 30 cms shall be provided over the initial bed before the second tier is laid. If additional tiers are formed, each of the subsequent tiers also shall have a sand cushion of 30 cms as stated above. The top most cable shall have final sand covering not less than 17 cms before the protective cover is laid. Unless otherwise specified, the cables shall be protected by the second class bricks of not less 20 cms x 10 cms x 10 cms (nominal size) protection covers placed on top of the sand (bricks to be laid breadth wise) for the full length of the cable. Where more than one cable is to be laid in the same trench, this protective covering shall cover all the cables and project at 5 cm. over the sides of the end cables. The trenches shall be taken back filled with excavated earth free from stones or other sharp edge debris and shall be rammed and watered, if necessary, in successive layers not exceeding 30 cm, unless otherwise specified.

3.3 Route Marker Cable route marker marked "Cable" shall be provided alongwith the route of the cable and location of loops. The route markers shall be of tapered concrete slab of 60 x 60cm at bottom and 50 x 50cm at top having a thickness of 10cm. Cable marker shall be mounted parallel to and 50cm away from the edge of the trench.

3.4 Cables in indoor trenches Cables shall be laid in indoor trenches wherever specified. The trench shall be made of brick masonry with smooth cement mortar finish with suitable removable covers (i.e. precasted slabs or chequered plates). The dimensions of the trenches shall be determined depending upon the maximum number of cables that is expected to be accommodated and can be conveniently laid. Cables shall be arranged in tier formation in trenches and if necessary, cables may be fixed with clamps. Suitable clamps, hooks and saddles shall be used for securing the cables in position. Spacing between the cables shall not be less than 15 cm centre to centre. Wherever specified, trenches shall be filled with fine sand and covered with RCC or steel chequered trench covers.

3.5 Cable on Trays/Racks Cable shall be laid on cable trays/racks wherever specified. Cable racks/trays shall be of ladder, trough or channel design suitable for the purpose. The nominal depth of the trays/racks shall be 150 mm. The width of the trays shall be made of steel or aluminium. The trays/racks shall be completed with end plates, tees, elbows, risers, and all necessary



hardware, entire steel trays/ racks shall be hot dip galvanized including widths & accessories. Cable trays shall be erected properly to present a neat and clean appearance. Suitable cleats or saddles made of aluminium strips with PVC covering shall be used for securing the cables to the cable trays. The cable trays shall comply with the following requirements :

i) The tray shall have suitable strength and rigidity to provide adequate support for all

contained cables.

ii) It shall not present sharp edges, burrs or projections injurious to the insulation of wiring/cables.

iii) If made of metal, it shall be adequately protected against corrosion or shall be made of

corrosion-resistant material.

iv) It shall have side rails or equivalent structural members.

v) It shall include fittings or other suitable means for changes in direction and elevation of runs.

3.6 Installation

i) Cable trays shall be installed as a complete system. Trays shall be supported properly from the building structure. The entire cable tray system shall be rigid.

ii) Each run of the cable tray shall be completed before the installation of cables. iii) In portions where additional protection is required, non combustible covers/enclosures

shall be used. iv) Cable trays shall be exposed and accessible. v) Where cables of different system are installed on the same cable tray, non combustible,

solid barriers shall be used for segregating the cables. vi) Cable trays shall be grounded by two nos, earth continuity wires. Cable trays shall not

be used as equipment grounding conductors. vii) At no place the cable tray / rack / ladder running horizontally should rest on any building

partition like Brick wall, RCC beams etc. but instead proper MS supports/ hangers to be provided at minimum of 1500 mm intervals and at every Turning Angles.

3.7 Jointing and termination’s Cable jointing shall be done as per the recommendations of the cable manufacturer. All

jointing work shall be done only by qualified/licensed cable jointer. All jointing pits shall be of sufficient dimensions as to allow easy and comfortable working. Jointing materials and accessories like conductor, ferrules, solder, flex, insulating and

protective tapes, filling compound, jointing box etc. of right quality and correct sizes, confirming to relevant Indian Standards.

Each termination’s shall be carried out using brass compression glands and cable sockets.

Hydraulic crimping tool hall be used for making the end termination’s. Cable gland shall be bonded to the earth by using suitable size copper wire/tape.



4.0 CABLE TRAYS

Cable Trays shall be Galvanized and factory fabricated out of MS channels, angleiron, tee, bends, sections, flats and perforated sheet for different loads and number and size of cables as given below :

Supply and fixing of perforated type cable trays of the following sizes of pre-galvanized iron.

i. 750 mm width x 62.5 mm depth x 2 mm thick ii. 600 mm width x 62.5 mm depth x 2 mm thick iii. 450 mm width x 62.5 mm depth x 2 mm thick iv. 300 mm width x 62.5 mm depth x 2 mm thick

v. 150 mm width x 50 mm depth x 1.6 mm thick Note : Suitable length of 8 mm dia GI rod suspenders including 25 X 25 X 4 mm GI angle

support at 2000 mm intervals shall be included in the item for perforated type cable tray.

C) [I] MEDIUM VOLTAGE PANELS:

1.0 SCOPE

This Section covers the detailed requirements of medium voltage switch Panel for 433V, 3 phase 50 Hz 4 wire system. These shall be branded and/or assembled/fabricated from a factory of repute. All switchgears shall be fully rated at an ambient of 40° C.

2.0 TYPE OF PANEL

The medium voltage switch board panel shall comprise of any one of the following types of switchgears or combination thereof as specified.

(a) Air Circuit breakers draw out or fixed type,

(b) Switch Disconnector Fuse Units fixed type, MCCBs of suitable Ics ratings.

MCCBs shall invariably be Current Limiting type. Features like Double Break,

Positive Isolation functions shall be preferred.

The Panel shall be indoor type having incoming sectionalization and outgoing switchgears as specified. The design shall be cubical type. The degree of enclosure protection shall be IP 42 as per IS: 13947 (Part-I).

3.0 M.V PANEL

3.1 General Construction

The switchboard shall be floor mounted free standing totally enclosed and extensible type. The switch board shall be dust & vermin proof and shall be suitable for the climate conditions as specified. The design shall include all provisions for safety of operation and maintenance personnel. The general construction shall conform to IS: 8623/1993 for factory assembled switch board.



3.2 Cubical Type Panels

3.2.1 Cubical type panels shall be fabricated out of sheet steel not less than 2.0 mm thick. Wherever necessary, such sheet steel members shall be stiffened by angle iron frame work. General construction shall employ the principle of compartmentalization and segregation for each circuit. Unless otherwise approved, incomer and bus section panels or sections shall be separate and independent and shall not be mixed with sections required for feeders. Each section of the rear accessible type panel shall have hinged access doors at the rear. Overall height of the panel shall not exceed 2.4 meters. Operating levers, handle etc. of highest unit shall not be higher than 1.7 meters. Multi-tier mounting of feeder is permissible. The general arrangement for multi tier construction shall be such that the horizontal tiers formed present a pleasing and aesthetic look. The general arrangement shall be approved before fabrication. Cable entries for various feeders shall be either from top or bottom. Through cable alleys located in between two circuit sections, either in the rear or in the front of the panel. All cable terminations shall be through gland plates. There shall be separate gland plate for each cable entry so that there will not be dislocation of already wired circuits when new feeders are added. Cable entry plates shall therefore be sectionalized. The construction shall include necessary cable supports for clamping the cable in the cable alley or rear cable chamber.

Cubicle panels with more than 1000 Amps BUS shall be made of tested structural modular sections.

3.2.2 Bus Bar and Connections

The bus bars shall be of Copper of high conductivity electrolytic quality and of adequate section. Current density shall not exceed 160 amps for Copper /sq. cm. The bus bar system may comprise of a system of main horizontal bus bars and ancillary vertical bus bars run in bus bar alleys on either side of which the circuit could be arranged with front access cable entries. In the case of rear access, horizontal bus system shall run suitably either at the top or bottom. All connections to individual circuits from the bus bar shall preferably be solid connections; however flexible connections shall also be permitted as per recommendations of the Panel Manufacturer. All bus bars and connections shall be suitably sleeved / insulated in approved manner.

3.2.3 Incomer I Termination

Incomer termination shall be suitable for receiving bus trunking /underground cables. Cable terminations shall invariably be through terminal blocks (Poiyamide or superior) or brought out solid terminals.

3.2.4 Instruments

All voltmeters and ammeters shall be flush mounted of size minimum 96 mm conforming to class 1,5 of IS: 1248 for accuracy. All voltmeters shall be protected with MCB.

3.2.5 Indicating Lamps

On all the incomers of M.V panels, ON/OFF indicating LED lamps shall be provided and shall be suitable for operation on AC supply. Phase indicating LED lamps shall be associated with necessary ON/OFF toggle switch.

3.2.6 Small Wiring

All small wiring for Controls, Indication etc, shall be of with suitable FRLS/HFFR (halogen free fire retardant) copper conductor cables. Wiring shall be suitably protected within switch



board. Runs of wires shall be neatly bunched, suitably supported and clamped. Means shall be provided for easy identifications of the wires. Where wires are drawn through steel conduits, the works shall conform to CPWD General Specifications for Electrical works (Part I- Internal) - 2005 and IS:732 as the case may be. Identification ferrules shall be used at both ends of the wires. All control wiring meant for external connections are to be brought out of terminal board.

OPERATIONAL REQUIREMENTS

The indoor type MV panel shall conform to the following: -

The panel shall comprise of incomers, outgoing feeders and bus coupler as specified. The incomer shall be either a double break / contact repulsion MCCB or an Air Circuit Breaker. The bus coupler shall be either a circuit breaker or a double break / contact repulsion MCCB or switch disconnector fuse unit as specified. The outgoing feeders shall be circuit breakers/MCCBs as specified.

(a) Bus bars for phase and neutral shall have a rating as specified in the format of Appendix II.

The entire switch panel shall be cubical type generally conforming to 18:8623/1993 for factory assembled switch board.

The incomer panel shall be suitable for receiving bus trunking or MV cable of size specified either from top or from bottom.

All incoming AIRCIRCUIT BREAKER/MCCB shall have suitable adjustable tripping current and the time delay settings.

(b) The entire panel shall have a common earth bar of size as specified with two terminals for earth connections.

4.0 RATING AND REQUIREMENTS

4. 1 Switch Disconnector Fuse Units/MCCB:

4. 1.1 Switch Disconnector Fuse Units: All SDF units for feeders or outgoing circuits shall be suitable for a Breaking capacity of 80 KA (57 MVA 433V) capacity at 433V 3 phase 50 Hz AC system conforming to IS: 4064. The number of units and rated current shall be as per detailed requirements specified. Switch Disconnector Fuse unit shall be double break front operated type. The units shall be complete with following: -

(a) Necessary HRC cartridge fuses conforming to IS:9224 (Part-II).

(b) Necessary operating mechanism quick break make type.

(c) Necessary set of CTs together with an ammeter and selector switch as specified.

(d) Necessary interconnections to bus bars,

(e) Necessary neutral link inside the SDF unit.

(f) All SDF units shall he AC23A utilization category.



4. 1.2 MCCB : All MCCBs shall be current limiting type with features of load line reversibility and suitable for Horizontal / Vertical mounting without any derating. Beyond 300Amps capacity MCCBs shall have positive isolation and preferably double break / contact repulsion & double insulation features. The MCCBs shall invariably be used with terminal spreaders,

5.0 TEST AT MANUFACTURERS WORK

All routine tests shall be carried out and test certificates produced to the department.

6.0 INSTALLATION

The installation work shall cover assembly of various sections of the panels lining up, grouting the units etc. In the case of multiple panel switch boards after connecting up the bus bars etc., all joints shall be insulated with necessary insulation tape or approved insulation compound. A common earth bar as per section 7 of these specifications shall be run inside at the back of switch panel connecting all the sections for connection to frame earth system. All protection and other small wirings for indication etc. shall be completed before calibration and commissioning checks are commenced. All relays, meters etc. shall be mounted and connected with appropriate wiring.

TESTING AND COMMISSIONING

Commissioning checks and tests shall include all wiring checks and checking up of connections. Relay adjustment/setting shall be done before commissioning in addition to routine Megger tests. Checks and tests shall include the following: -

(a) Operation checks and lubrication of all moving parts. (b) Interlock function checks. (c) Continuity checks of wiring, fuses etc. as required. (d) Insulation test: When measured with 500V Megger the insulation resistance shall not be

less than 100 mega ohms. (e) Trip tests and protection gear test.

C [II] MEDIUM VOLTAGE SWITCHGEAR: 1.0 GENERAL

This section covers specification of Medium Voltage Switchboards incorporating items of switchgear like Air Circuit Breaker, Moulded Case Circuit Breaker, Contactor’s and Metering etc.

2.0 STANDARDS AND CODES

The latest amended upto date Indian Standard Specifications and Codes of Practice will apply to the equipment and the work covered by the scope of this contract. In addition the relevant clauses of the Indian Electricity Act 1910 and Indian Electricity Rules 1956 as amended upto date shall also apply. Wherever appropriate Indian Standards are not available, relevant British and/or IEC Standards shall be applicable.



3.0 SWITCHGEAR: 3.1 Moulded Case Circuit Breakers :

3.1.1 General The circuit breakers shall comply with latest IEC/IS standards.

The breaking capacity performance certificates shall be available for category A to the

above mentioned standards. . The test shall be carried out under the breaking performance during the ultimate breaking capacity (Icu). Certificate for all the sequences (Sequence 1 mandatory) should be available.

All circuit breakers shall have a rated operational voltage of 600V AC (50Hz). The rated insulation voltage shall be 600V and 660V at 50/60 Hz. for low breaking

capacity and high breaking capacity MCCBs respectively. Thermal overload release adjustment can be done from a single point. MCCB cover need

not to be opened for doing such adjustment. There should be different levels of breaking capacities starting from 10kA upto 50kA for

flexibility in selection. The breaker shall be maintenance free and fully tropicalized. It shall either be 3 poles or 4 poles (switched neutral). Production site organization shall be certified to comply with ISO 9001 standard.

3.1.2 Construction Operating mechanism shall be of the quick make quick break type, with the speed of

operation independent of the operator, and mechanically trip free from the operating handle so as to prevent the contacts from being held closed against short-circuit and overload conditions. The operating mechanism shall be constructed to operate all poles in a multi-pole breaker simultaneously during opening, closing and tripped conditions.

It shall not require any external power supply to operate the tripping mechanism. The breakers shall be operated by a toggle which shall clearly indicate the three

fundamental position ON, OFF and TRIPPED. If required, the breaker will be equipped with rotary handles. The breaking and extinction of the electrical arc shall be achieved by means of non-

welding contacts and an arc chute surrounding these contacts. If required all electrical accessories should be fitted by manufacturer to avoid tampering

at site.



3.1.3 Characteristics The protection unit shall have as required.

Variable overload setting from 80 to 100% of In. The setting knob should be centrally adjustable from front. MCCB cover need not to be opened for carrying out adjustment. Short circuit setting should be fixed at 10In +/- 20% as specified in IEC and latest IS. Earth fault protection (when required) shall be provided as an integral part.

3.1.4 Operation If required, the breaker shall be provided with the facility for padlocking and door

interlocking.

The electrical and mechanical endurance of the moulded case circuit breakers should be as defined.

The moulded case circuit breakers shall be equipped with a "push to trip" button in front

to test operation and the opening of the poles. The circuit breaker rating, the "push to trip" button, outgoing circuit identification and

the contact position indication must be clearly visible and accessible from the front, through the front panel or the door of the switchboard.

3.1.5 Options

It shall be possible to combine the following functions into the circuit breaker Earth fault protection Remote indication off circuit breaker trip condition and operational conditions (ON/OFF). Auxiliary contacts, alarm contacts should be available if required.

3.1.6 Installation It should be possible to terminate Aluminium cable of required size for the defined current carrying capacity. The requisite size should be made available by means of extended terminals (as a standard offer) in case the direct terminals are not of adequate size. Adequate phase to phase clearance has to be ensured in case of extended terminations. The circuit breaker should provide the flexibility of terminating line and load from any direction. Manufacturers should test the circuit breaker for this condition and requisite test certificate should be available. Phase barrier should be provided as a standard feature.



3.2 Metering, Instrumentation And Protection. Ratings, type and quantity of meters, instruments and protective devices shall be as per Bill of Quantities. Current Transformers CTs shall confirm to latest IS codes in all respects. All CTs used for medium voltage application shall be rated for 1 kV. CTs shall have rated primary current, rated burden and class of accuracy as specified in schedule of quantities/drawings. Rated secondary current shall be 5A unless otherwise stated. Minimum acceptable class for measurement shall be 0.5 to 1 and for protection class 10. CTs shall be capable of withstanding magnetic and thermal stresses due to short circuit faults. Terminals of CTs shall be paired permanently for easy identification of poles. CTs shall be provided with earthing terminals for earthing chassis, frame work and fixed part of metal casing (if any). Each CT shall be provided with rating plate indicating : i. Name and make ii. Serial number iii. Transformation ratio iv. Rated burden v. Rated voltage vi. Accuracy class CTs shall be mounded such that they are easily accessible for inspection, maintenance and replacement. Wiring for CT shall be with copper conductor PVC insulated wires with proper termination works and wiring shall be bunched with cable straps and fixed to the panel structure in a neat manner. Potential Transformer PTs shall confirm to latest amendment upto date IS Codes. Measuring Instruments Direct reading electrical instruments shall conform to latest IS codes in all respects. Accuracy of direct reading shall be 1.0 of voltmeter and 1.5 for ammeters. Other instruments shall have accuracy of 1.5. Meters shall be suitable for continuous operation between -100C and +5000C. Meters shall be flush mounting and shall be enclosed in dust tight housing. The housing shall be of steel or phenolic mould . Design and manufacture of meters shall ensure prevention of fogging of instrument glass. Pointer shall be black in colour and shall have Zero position adjustment device operable from out side. Direction of deflection shall be from left to right. Selector switches shall be provided for ammeters and volt meters used in three phase system. KWH Meter Meter shall be of 3 phase digital dual type with communication port (or as specified in the BOQ) and shall be provided with a maximum demand indicator.



Power factor meters 3 phase power factor meters shall be of digital type with current and potential coils suitable for operation with current and potential transformers provided in the panel. Scale shall be calibrated for 50% lag - 100% - 50% lead readings. Phase angle accuracy shall be +40.



AB) LIST OF APPROVED MAKES

The preference of makes shall be in the order as mentioned below. The contractor should quote for the make mentioned first followed by other alternates in their order.

S. No. Details of Equipment/ Material Manufacturer’s Name

I) HVAC ITEM:

1. Water Cooled Screw Chiller : York//Trane/ Carrier

2. Chilled/ Condenser Pumps: : Savecon (Kirloskar)/ Bell & Gossett/Wilo (Mather+Platt)/ Grundfos

3. Cooling Towers : Mihir/Advance /Paharpur

4. Hot Water Generator : Rapid Cool/Emerald/Thermax/Sandhu

5. Air Handling Units:

6. Air Handling Units : Edgtech/Zeco/Syatem Air/Flaktwood

i) Cooling Coil : As per manufacture standered

ii) Fan : Kruger/Nikotra/Comferi, Equivalent with AMCA Certification

iii) Fan Coil Unit & Cassette Unit : Sinko/Carryaire/Trane

7. Split AC Daikin/ Hitachi/Toshiba /Carrier

8. Precision Air Handling Unit (PAHU) : Stulz/ Emerson/Clivet/ Bluebox

9. M.S. Pipes:

i) Upto 150mm dia : Tata/Jindal Hissar/Sail

ii) Above 150mm dia : Tata/Jindal Hissar/Sail

10. Butterfly Valves : Advance/Audco/Danfoss

11. Motorized Butterfly Valves : Belimo/Audco/Danfoss

12. Check Valves : Advance/Audco/ Danfoss

13. Ball valve : Zoloto/ Audco/ RC

14. Balancing Valves : Danfoss/ Audco/Advance

15. 2-way Modulating Valves with Thermostat : Belimo/Danfoss/Johnson Controls /

Honeywell 16. Expansion Bellows : Resistoflex /Cori/Areaflex

17. Pot/Y-Strainers : Sandhu/Rapid Cool/Sant/Emerald

18. Suction Guide with Strainer : Anergy/Armstrong/Emerald

19. Pressure Gauge (Industrial Type) : Feibig /H. Guru/ Emerald

20. Differential Pressure Switch : Rapid Control/Anergy/Sant




21. Thermometers : Feibig/H.Guru/Sandhu

22. Closed Expansion Tank : Anergy/ Bell & Gossett/Sandhu

23. Air Separator : Anergy/ Bell & Gossett/Sandhu

24. Auto Air Vent : Anergy/Rapid Cool/Oventrop

25. Plug Valve : Anergy/Rapid Cool

26. Factory Fabricated Duct : Ductofab/Zeco/Rolastar

27. G.I. Sheets : Sail/Tata/Jindal

28. Al. Sheets : Hindalco/Balco/ NALCO

29. Fire Dampers : Ravistar/Greenheck/Flakt/Airflow

30. Grills/Diffusers : Ravistar/ Caryaire/Flowel/Airflow

31. Fresh Air Louvers : Ravistar/Caryaire/Flowel/Airflow

32. Resin bonded Glass wool : UP TWIGA / Owens Corning/ Kimmco

33. Nitrile Rubber Insulation - Armacell / Armaflex/ supreme/ A-Flex/ Thermaflex

34. PUF Saddles : Lloyds/Beardsell/ Malanpur

35. Expanded Polystyrene (EPS) : FGP/ Pilkington/Beardsell/ Styrene/ Indian Packaging

36. Filters (in Air-conditioning system) : Mechmaark/Thermodyne/Purolator/Anfilco

37. Ventilation Fans:

i) Tube/Vane Axial : Kruger/System Air/ Greenheck

ii) Inline (Centrifugal) : Kruger/ Caryaire/ Ostberg

iii) Propeller Fans : Kruger/ GE/Alstom/Crompton

38. Air Washers/Scrubber:

i) Air Washer/Scrubber : Edgetech/Zeco/Roots Air/Ambassador

ii) Fan : Kruger/Nikotra/Comferi/ Equivalent with AMCA Certification

iii) Pump : Kirloskar/Beacon

iv) Filters : Mechmaark/Thermodyne/Purolator/Anfilco

39. Temperature Control With Automatic Balancing Valve For Fcu’s : Flowcon / Oventrop / TA




II) Electrical Item:

1. Distribution /Starter Panel :Ambit/CWS/Jackson/ Neptune

2. Distribution Boards : MDS Legrand/ Hager/ Siemens/ Schneider

3. Air Circuit Breaker (ACB) : Siemens/ L&T/Schneider/ABB

4. Moulded Case Circuit Breaker (MCCB) : Siemens/ L&T/Schneider/ABB

5. Miniature Circuit Breaker (MCB) : MDS Legrand/ Hager/ Siemens/ Schneider/ L&T

6. Electrical Terminals : Elemax/ Connectwell

7. Residual Circuit Breaker (RCCB/RCBO’s) : MDS Legrand/ Hager/ Siemens/ Schneider/ L&T

8. MPCB’s : MDS Legrand/ Hager/ Siemens/ Schneider/ L&T

9. Contactors & O/L relays within built SPP

: L&T/ Telemecanique/ Merlin Gerin/ ABB/ Mitsubhishi

10. On-Load Change Over Switch/Main Switch : Socomeac/ Emerson/ L&T

11. Potential Transformers : Automatic Electric/ Precise/ Kappa 12. Current Transformer (Epoxy Cast Resin) : Automatic Electric/ Precise/ Kappa

13. Indicating Lamps LED Type, Push Button

L&T (ESBEE)/ Schneider/ Siemens/ Altos :

14. Electronic Digital Meters : Conzerv/ L&T/ Neptune/Socomec/Trinity

15. Cable Tray : MEM/Slotco/OBO 16. Cables & Wire : Gloster/RPG/Polycab/Universal/Finolex



S. No. Details of Materials / Equipment Manufacturer’s Name

III) BMS Item:

1. Standalone DDCs Honeywell-WEBs / Alerton / Spyder / Siemens (PX SERIES)

2. Web Based BMS Software with unlimited user license

SIEMENS(DESIGO INSIGHT) / HONEYWELL-WEBs / ALERTON

3. Web Based Router / Network Area Controller

Honeywell-WEBs / Alerton / Siemens

4. Immersion Temperature Sensor Honeywell / Alerton / Siemens 5. Duct Temperature Sensor Honeywell / Alerton / Siemens 6. Outside Air Temperature Sensor Honeywell / Alerton / Siemens 7. Room Temperature Sensor Honeywell / Alerton / Siemens 8. Duct Humidity Sensor Honeywell / Alerton / Siemens 9. Room Humidity Sensor Honeywell / Alerton / Siemens

10. Flow Meter Schenitech / Honeywell / Kampstrup 11. Duct Static Pressure Sensor Honeywell / Alerton / Siemens 12. Water Level Switch Veksler / Filpro / Sontay 13. DP Switch – Water Honeywell / /Sontay / Siemens 14. DP Switch – Air Honeywell / /Sontay / Siemens 15. CO2 Sensor / IAQ Honeywell / Siemens / Sontay 16. Water Flow Switch Honeywell / Alerton / Siemens 17. Pressure Transmitter – Water Honeywell / Alerton / Siemens 18. Current Relay Veris / Seto / Mamac/Omron / ABB 19. Voltage / Current / Power Factor

Transducer SETO / ABB / L&T / Enercon / SETCO / Situ

20. Flame Proof Level Switch / Level Transmitter

Veksler / Filpro / Sontay / Techtrol

21. PH Sensor / TDS Sensor Honeywell / Hach / Greisinger / Shenitech 22. Personal Computer HP / DELL / LENOVO / TOSHIBA 23. Colour Monitor DELL(ULTRA SHARP) / HP(PAVILION) /

SAMSUNG(SYNC MASTER) / ASUS / LG (FLATRON) / Lenovo

24. Printer HP / EPSON / CANON 25. Copper Conductor Control Cable Finolex / RR Kable / Delton / Polycab 26. Communication Cables / Signal Cable Delton /Molex/Avaya 27. LAN cables for BMS Network Belden / D-Link / Avaya 28. PVC Conduits BEC / AKG /Optima

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TECHNICAL SPECIFICATION FOR H.V.A.C WORKS · R) STANDARD SPECIFICATION OF FIRE DAMPERS: ... HVAC...

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Transcript of TECHNICAL SPECIFICATION FOR H.V.A.C WORKS · R) STANDARD SPECIFICATION OF FIRE DAMPERS: ... HVAC...