RGX-S-61-1340-101 Part 1

Job No. Doc. No. Rev.

Project Specification RGX-S-61-1340-101 118

Ras Laffan Onshore Expansion Project Date : 27 May01 Apr., 2005 Sheet 1 of 15

Prp'd : J. Kuwabara

General Specification for Heating, Ventilating Chk'd : T. Yoshida

and Air Conditioning of Buildings App'd : F. Tachihara

Table of Contents

1. GENERAL......................................................................................................................................................................3

2. DESIGN CRITERIA......................................................................................................................................................4

3. SYSTEM DESCRIPTION...........................................................................................................................................13

4. TESTING,ADJUSTMENT AND BALANCING.......................................................................................................14

5. MINIMUM REQUIREMENT FOR HVAC EQUIPMENT ......................................................................................14

6. ATTACHMENTS ........................................................................................................................................................16 For Information For Review For Approval X For Construction X As Built

Rev Date Page Description Prpd Chkd Appd

A 19 Jun ‘01 All First Issue for Approval J.K T.Y F.T

0 13 Jul ‘01 All Issue for Construction J.K T.Y F.T

1 07 Sep ‘01 All Incorporate RGX-RC-CYTY-0245 J.K T.Y F.T

2 22 Feb. ‘03 All Re-Issue for Approval J.K T.Y F.T

3 07 Apr. ‘03 All Issue for Construction J.K T.Y F.T

4 06 Oct. ’03 All AS-BUILT – TRAIN 3 J.K T.Y F.T

5 20 Oct. ‘03 All Issue for Approval – AKG-1 J.K T.Y F.T

6 14 Nov. ‘03 All Issue for Construction – AKG-1 J.K T.Y F.T

7 09 Mar. ‘04 All Issue for Approval – Train 4, NGL Extraction Unit J.K T.Y F.T

8 01 Apr. ’04 All Issue for Construction – Train 4, NGL Extraction Unit T.Y T.Y F.T

9 25 Aug. ’04 All Issue for Approval – Train 5 T.Y T.Y F.T

10 06 Sep. ‘04 All Issue for Construction – Train 5 T.Y T.Y H.E

11 27 May. ‘05 All AS-BUILT – T4/LT/AG/PD T.Y T.Y F.T

Ras Laffan Onshore Expansion Project RGX-S-61-1340-101 General Specification for Heating, Ventilating Sheet 3 of 16 And Air Conditioning of Buildings

1. GENERAL 1.1 Scope This specification defines the requirements of detail design and construction for Heating, Ventilating

and Air Conditioning (HVAC) system of Buildings for the RAS LAFFAN ONSHORE EXPANSION PROJECT.

1.2 References The work shall be performed in accordance with this specification and the following documents,

codes, specifications, and industry standards. Their latest editions at time of contract award shall be used. Local codes shall govern where they have more stringent requirements than this specification. Where a conflict exists between the various documents, the more stringent requirement shall govern.

(1) Project Specifications RGX-S-00-1221-001 Basic Engineering and Site Data RGX-S-00-1130-004 Document Numbering Procedure RGX-S-00-1130-005 Equipment Numbering Procedure RGX-S-00-1226-001 Plant Noise Control RGX-S-00-1226-002 Equipment Noise Control RGX-S-61-1340-002 Buildings – Architectural Specification RGX-S-61-1340-201 Plumbing & Piping for Buildings RGX-S-61-1340-001 Buildings - General Requirements RGX-S-61-1340-102 HVAC Systems / Control Panels RGX-S-91-1381-001 Electrical Design Criteria RGX-S-91-1380-003 Electrical Requirements for Buildings RGX-S-91-1382-003 Low Voltage Induction Motors RGX-S-91-1382-005 Low Voltage Cables RGX-S-83-1222-001 Loss Prevention-General Specification RGX-S-83-1222-002 Fire and Gas Detection Systems- General Specifications (2) Q.N. B. S Section 12 Air Conditioning and Ventilating Installations (3) State of Qatar MEW Rules, Regulations and Code of practice for Design and Installation of

ACHVR systems. 1.3 Language and Units The following language and unit shall be used for specifications, calculation sheets and drawings

throughout the project. Language : English Unit : S.I Unit Conventional conversion of the unit system used in various engineering documents into

Meter/Yard/Pound Unit system shall be made as follows


Table 1

Category S.I Unit Meter/Yard/Pound Unit

Mass 1 Kg 1/0.4536 lbf

Length 1 mm 1 m

1/25.4 inch 1/0.30480 foot

Pressure, Stress 1 KPa 1/9.806 Tonf/m2 1/6.894 psi

Density 1 Kg/m3 1/16.019 lb/ft3 =1/27680. lb/in3

Area 1 m2 1/0.0929 ft2 =1/0.00064516 in2

Velocity 1 m/s 1/0.3048 ft/sec 1/0.00508 ft/min

Temperature °C (°F-32)x5/9

Flowrate 1 m3/h 1/0.0283 ft3/hr

Quantity of Heat 1 KJ 1/1.0551 Btu

Heat Flow 1 W 1/0.2931 Btu/hr

Thermal Conductivity 1 W/m.k (or 1 W/m °C)

1/0.1442 Btu/hr.ft2. °F/in

Transfer Coefficient 1 W/m2.k (1 W/m. °C)

1/5.678 Btu/hr.ft2. °F

2. DESIGN CRITERIA

2.1 Calculation (1) All heating/cooling loads calculations shall be performed in accordance with the

recommendations and/or requirements of ASHRAE Handbook of Fundamentals. (2) Each heating/cooling coil selection and calculation shall be accompanied by a plotted

psychometric chart. (3) All air cooled condensing units shall be suitable for operation at the maximum and minimum ambient temperatures specified in paragraph 2.3.

2.2 Geographical Location of the Site North Latitude : 25° 55' East Longitude : 51° 35'

2.3 External Design Conditions Summer dry bulb temperature : 48°C *1, 44°C *2 Summer wet bulb : 34°C Winter dry bulb : 4°C Average temperature : 29°C Average daily maximum humidity : 90% Summer, 95%/Winter Average daily minimum humidity : 50% Condenser cooling air temperature : 48°C Wind speed : 33 m/sec maximum *1 For technical buildings such as control building, electrical substation

and computer building.


*2 For non technical buildings such as general office building, canteen,

laboratory and workshop.

2.4 Internal Design Conditions Internal design condition is shown in Table 2 HVAC Internal Design Condition.

Ras Laffan Onshore Expansion Project RGX-S-61-1340-101 General Specification for Heating, Ventilating Sheet 6 of 16 And Air Conditioning of Buildings Table 2 HVAC INTERNAL DESIGN CONDITION

Internal Design Condition

No. Room Name Summer Winter Remarks

DB (°C) RH (%) DB (°C) RH (%)

1. General

(1) General Open Office 24 ± 1.5 50 ± 10 22 ± 1.5 50 ± 10

(2) Private Office 24 ± 1.5 50 ± 10 22 ± 1.5 50 ± 10

(3) Executive Office 24 ± 1.5 50 ± 10 22 ± 1.5 50 ± 10

(4) Meeting/Lecture Room 24 ± 1.5 50 ± 10 22 ± 1.5 50 ± 10

(5) Conference Room 24 ± 1.5 50 ± 10 22 ± 1.5 50 ± 10

(7) Kitchen 24 ± 1.5 50 ± 10 22 ± 1.5 50 ± 10

(8) Locker Room 24 ± 1.5 50 ± 10 22 ± 1.5 50 ± 10

(9) Toilet 24 ± 1.5 50 ± 10 22 ± 1.5 50 ± 10

(10) Janitor Room 24 ± 1.5 50 ± 10 22 ± 1.5 50 ± 10

(11) A/C Machine Room Max. 30 NR Min. 18 NR

4. Prayer Room 24 ± 1.5 50 ± 10 22 ± 1.5 50 ± 10

5. Control Room/Aux. Rack Room/UPS/Battery Charger Room

24 ± 1.5 50 ± 10 22 ± 1.5 50 ± 10

6 COMPUTER Room 24 ± 1.5 50 ± 10 22 ± 1.5 50 ± 10

7. Elec. Switchgear/MCC Room/ GIS Room & AC/DC Room in Substation-A

Max. 30 NR NR NR

8. Instrument Cabinet Room in Substation

24 ± 1.5 Max. 60 22 ± 1.5 NR

9. Battery Room Max. 30 NR Min. 18 NR

10. Elec. AFD Room in Substation

Max.30 NR NR NR

11 Operator House 24 ± 3 50 ± 10 20 ± 3 NR By Split type Air Conditioner

Note : DB = Dry Bulb RH = Relative Humidity NR = Not Required

2.5 Electrical Power Supply Conditions

The power supply shall be either 415V, 3 phase, 3 wire or 415V, 3 phase, 4 wire as required. Isolation transformers shall be provided for low voltage power distribution panel, as required by design.

Electrical equipment shall be suitable for operation at the nominal supply voltage indicated below. The a.c. system frequency is 50 Hz.

Service Voltage Phase Connection to Earth

Primary Distribution 415V 3 High Resistance Grounded

(No neutral available)

Motors (0.2 kw to 149 kw)

415V

3

High Resistance Grounded


(up to 0.2 kw) 240V 1 Neutral Solidly Grounded

Space heaters (above 3 kw)

415V

3

High Resistance Grounded

(up to 3 kw) 240V 1 Neutral Solidly Grounded

Lighting and Small Power 415/240V 3/1 Neutral Solidly Grounded

Computers/Instrument Power

120V a.c. 1 Grounded

Shutdown/Alarm 24 Vd.c. - ungrounded

2.6 Hazardous Area Classification

(1) Location of air intake of each building shall be in a non-hazardous area and facing away from hazardous zones.

(2) All electrical enclosures shall be suitable for the environment in which they are electrically

classified.

2.7 Ventilation System

(1) General Exhaust ventilation shall be by mechanical means. Toilets, showers, wash rooms, locker

rooms and stores within an air conditioned building shall be ventilated and exhausted by infiltrating air from the adjoining spaces.

For all non air conditioned spaces, outside air through external louver shall be used for

ventilation and exhausted by mechanical or natural means.

Where sealed batteries are used, exhaust ventilation shall not be required.

(2) Air Change The required minimum air changes (AC) are as follows. ⋅ Toilets, shower room : 15 AC per hour ⋅ Locker room : 15 AC per hour

Exhaust from kitchen shall be through extraction hoods fitted over all heat and steam generating appliances. The minimum rate shall be 8 air changes per hour overall.

(3) Air Distribution Exhaust air from toilets, shower rooms, locker rooms and battery rooms shall not be

recirculated.

Exhaust duct shall be located as far as possible from air intake duct to avoid recirculation of contaminated air


2.8 Air Filtration System

2.8.1 Central System

(1) All Air Handling Units shall be equipped with pre filter and after filter which have collection efficiency as follows.

Pre Filter : 80% of Weight Arrestance Test on ASHRAE Standard 52 After Filter : 90% of Atmospheric Dust Spot Efficiency Test on ASHRAE Standard 52

(2) Single Packaged Air Conditioners shall be equipped with pre filter which has collection efficiency as follows:

Pre Filter : 80% of Weight Arrestance Test on ASHRAE Standard 52

2.8.2 Fresh Air Intake Sand Trap Filter shall be provided for fresh air intake system. (1) Type 1

Sand Trap Filter shall consist of sand trap device, pre filter, after filter, chemical filter and casing. Collection efficiency of filters shall be as follows:

Pre Filter : 80% of Weight Arrestance Test on ASHRAE Standard 52 After Filter : 90% Atmospheric Dust Spot Efficiency Test on ASHRAE Standard 52 Chemical Filter : Purafilter Filter Plastic (ABS) casing module model PM-18P. Filter Media, Type CP Blend (20 lbs. Per one module) or equivalent as per the following conditions:

- Outside design gas level H2S : 26 ppb, SO2: 280 ppb

- Inside allowable gas level H2S : 3 ppb, SO2: 10 ppb (ppb=parts per billion=mm3/m3 )

Type 1 Sand Trap Filter shall be provided for the following buildings. Satellite Instrument Houses Substations Local Control Buildings (LCS-58 & LCS-59)

(2) Type 2 Sand Trap Filter shall consist of sand trap device, pre filter, after filter, and casing.

Collection efficiency of filters shall be as follows: Pre Filter : 80% of Weight Arrestance Test on ASHRAE Standard 52 After Filter : 90% of Atmospheric Dust Spot Efficiency Test on ASHRAE Standard 52 Type 2 Sand Trap Filter shall be provided for all buildings which have air intake system, other than listed in item 2.8.2 (1).


2.9 Pressurization System The following buildings/houses shall be pressurized positively against atmosphere with 2.5 mm

WG (25 Pa) with all doors and openings closed condition.

- Satellite Instrument Houses - Substations - Local Control Buildings (LCS-58 & LCS-59)

Blower suction shall be taken from a stack having an intake located a minimum of 7.9 m (26 ft) abovegrade. The intake shall be in a location that is unclassified and not subject to corrosive agents.

The intake shall be provided with a conical cap and shall be screened to prevent entry of birds

and wind-driven rain and debris. Filters provided as per para. 2.8 shall be easily accessible and removable for cleaning or replacement.

Blower motors shall be mounted external to blower cases and air ducts. Exposed rotating parts shall be suitably protected by guards or enclosures.

2.10 Air Duct Systems (1) All duct systems shall be designed in accordance with ASHRAE and Sheet Metal and Air Conditioning Contractors National Association (SMACNA) standards.

(2) All duct shall be suitable for the pressure that is to be encountered with a velocity in the range of 3.1 to 15.2 m/s (600 to 3000 ft/min). The velocity selected shall be in accordance with Table 3 and shall limit the sound level criteria below NC 40. All duct work passing through unconditioned areas shall be insulated.

(3) Branch ducts (ducts entering occupied areas) should be designed in such a way as to be suitable for system pressure with a velocity in the range of 6.1 to 7.6 m/s (1200 to 1500 ft/min). The selected velocity shall ensure that the sound levels are below NC 35. This duct should be insulated to avoid condensation.

Table 3 MAXIMUM DUCT VELOCITIES FOR BUILDING SYSTEMS, m/s (ft/min)

Application

Controlling Factor Noise Generation Main Ducts

Controlling Factor – Duct Friction

Main Ducts Branch Ducts

Supply Return Supply Return

Private Offices Directors Rooms Libraries/Conference Areas

6.1(1200)

10.2(2000)

7.6(1500)

8.1(1600)

6.1(1200)

General Offices Lobby Areas Computer Areas

7.6(1500)

10.2(2000)

7.6(1500)

8.1(1600)

6.1(1200)

General Use Areas Cafeterias

9.1(1800) 10.2(2000)

7.6(1500) 8.1(1600) 6.1(1200)

Industrial 12.7(2500) 15.2(3000)

9.1(1800) 11.2(2200)

7.6(1500)

(4) Both horizontal branch and low-pressure ducts shall be designed by the “Equal Friction”

method with a pressure drop less than 2.5 mm wg/30 m (0.1 in. wg/100 ft).


(5) All outlets/diffusers shall be designed with a terminal velocity of 0.3 to 0.8 m/s (50 to 150 ft/min) and rated in accordance with Air Diffusion Council (ADC) standards. Manufacturer’s published data shall be taken into account for proper air throw/distribution, noise, and pressure drop. Selection must be made to ensure sound levels below NC 35.

2.11 Piping

(1) Chilled Water Piping

Chilled water piping shall be designed with due regard given to expansion and contraction and shall be arranged to prevent noise or hammering. Flanges and/or unions shall be utilized to permit dismantling for removal and replacement of piping components such as valves.

The unit shall be furnished with a complete chilled water piping system consisting of valves, strainers, flanges, pressure gauges and thermometers etc.

Flexible connections shall be provided at water inlet and outlet of equipment such as chillers and pumps.

Balance and shut-off valves shall be provided in the inlet and outlet of each evaporator, air handling unit and fancoil unit.

Piping shall be designed when the water velocity not exceeding 4.0 m/s.

Piping material and type of joint shall be carbon steel pipe conforming to ASTM A106B.

(2) Refrigerant Piping

Refrigerant piping for air conditioning system shall be of Phosphorus Deoxidation Copper seamless (hard draw) copper tube conforming to ASTM B280 assembled with wrought copper fittings.

The piping size shall be recommended by equipment manufacturer/supplier according to the length to be installed. All refrigerant pipings shall be provided within all accessories in accordance with manufacturer's recommendations.

(3) Drain Piping

All condensate drain lines, from air handling units to the plumbing sanitary sewer or open drain system, shall be PVC type Schedule 40.

2.12 Thermal Insulation (1) General

The following specification outlines the general requirement of the type of insulation work. The installation shall be performed by skilled tradesmen.

All glues, tapes and fixing materials used shall be non-combustible.

(2) For Duct Work Unless otherwise specified, all ducts shall be externally insulated as per the following manners.


Type of Duct Location

All supply and return air ducts

Inside false ceiling & concealed from view Internally

Fiberglass roll mat

25 mmTHK, 24 kg/m3 density

Finishing with pre-sized glass cloth

Exposed to view Internally

Fiberglass board

50 mmTHK, 40 kg/m3 density

Finishing with pre-sized glass cloth.

Externally Fiber glass board

50 mm thk, 24 kg/m3 density

0.6 mm thk aluminum cladding.

Fiberglass insulation material shall be wrapped with a vapor barrier of aluminum foil. The vapor barrier shall be sealed and completely free of perforations or leaks. Roll mat wraps shall be overlapped by at least 100mm and shall be fastened with 65mm wide aluminum foil tape.

Fiberglass board applied as per (1) above shall be provided with stick-clip or welded pins at the rate of one for about 0.16 of a square meter of insulation area.

Where fresh air ducts pass through an air-conditioned environment, these shall be insulated to prevent condensation occurring in the duct.

(3) For Piping System

For chilled water piping Chilled water piping shall be insulated as per following manners

Material Nominal Pipe Size (mm) Thickness of Insulation

Polyurethan or Up to 20 20 Polystyrene 25 to 40 25

50 to 80 40 100 and over 50

All outdoor and non-air conditioned space insulated surface shall be vapors sealed with aluminum foil and cladded with aluminum sheet.

2.13 HVAC Control System

(1) General Electric/Electronic controls shall be adopted for all HVAC control system.

Chilled water flow rate to Air Handling Unit shall be controlled by three way control valve to keep supply air temperature or representative room temperature.

Air Cooled Water Chiller Unit shall be operated by chilled water temperature sensor/controller.

Ras Laffan Onshore Expansion Project RGX-S-61-1340-101 General Specification for Heating, Ventilating Sheet 12 of 16 And Air Conditioning of Buildings Air Cooled Condensing Unit shall be operated by supply air, return air, room temperature

sensor/controller and/or room humidity sensor/controller as specified in Attachment-1. Fan Coil Unit shall have thermostat and three way control valve. Electric Duct Heater shall be operated by representative room temperature sensor/controller. Humidifier shall be operated by return air or room humidity sensor/controller

(2) Safety System All HVAC equipment shall be shut down by fire signal, where applicable Where gas detector is provided on fresh air intake duct, fresh air intake fan and exhaust fans

shall be shut down and actuated damper shall be closed by gas detection, however Air Handling Unit shall continue recirculation operation.

Smoke detector shall be provided according to NFPA 90A and 96 Status of all fire/gas/smoke damper shall be indicated on HVAC Control Panel if motor

operated type of damper is provided The following alarms shall be provided on HVAC Control Panels as applicable. ♦ Flow failure of supply air

♦ Flow failure of chilled water ♦ High temperature of electric heater ♦ High temperature of chilled water ♦ Malfunction of Air Cooled Water Chiller / Air Cooled Condensing Unit ♦ Room pressurizing failure ♦ Filter clog

(3) HVAC Common Alarm a) Satellite Instrument Houses and Local Control Building (LCS-58)

Warning lamp located at the door of HVAC Machine Room shall be turned on, as HVAC common Alarm.

b) Substations, Local Control Building (LCS-59), & SS-55/SIH-55 & SS-503/SIH-75

HVAC common alarm shall be distributed to annunciator panel.

2.14 Noise and Vibration (1) Room Noise Limit HVAC system shall be designed so that the following noise level are attained.

Interior (Room/Area) Sound Level dB(A)

Executive Office, Large Conference Room 35

Private and Semi-private Offices, Cafeterias, Conference Rooms (20 persons), Mosque, Medical Rooms

45

General Offices, Laboratories 50

Control Rooms, Typing Areas 55

Workshop Offices 65


(2) Vibration

Equipment shall be properly isolated from floors, platforms or building structural members to prevent the transmission of vibration and the generation of noise. Ducts, pipes and conduits shall also be isolated as required to hold noise generation below the levels.

All systems shall be designed, constructed and installed with special precaution and with

regard to compensation of some movements caused by temperature changes.

3. SYSTEM DESCRIPTION 3.1 HVAC System Component Basic HVAC Flow Scheme for each building shall be shown in Attachment-1. Major equipment shall consist of, but not limited to:

3.1.1 Satellite Instrument Houses, Local Control Building (LCS-58 & 59) & Control Room in SS-A

♦ Air Cooled Condensing Unit (on the ground / on the roof top for LCS-59 & SIH-61) ♦ Single Zone Air Handling Unit ♦ (Supply Fan, Direct Expansion Coil, Humidifier, Pre and After Filter, Mixing Box) ♦ Electric Duct Heater ♦ Fresh Air Intake Fan ♦ Exhaust Fan ♦ Sand Trap Filter for Fresh Air

3.1.2 Substations & AFD Electrical Room and GIS Room & AC/DC Room in SS-A

♦ Air Cooled Condensing Unit (on the roof top) ♦ Split Type Air Conditioners, cooling only (Floor Mounted Type) ♦ Fresh Air Intake Fan (For Pressurizing) ♦ Sand Trap Filter for Fresh Air

3.1.3 Operator House

♦ Air Cooled Condensing Unit (on the ground or wall mounted) ♦ Split Type Air Conditioner

3.1.4 Main Building (1) General ♦ Air Cooled Water Chiller on the roof top for Main Building. ♦ Single Zone Air Handling Unit (Supply Fan, Chiller Water Cooling Coil, Electric Heating Coil, Humidifier, Pre and After Filter,

Mixing Box) ♦ Electric Duct Heater ♦ Fan Coil Unit (Supply Fan, Chiller Water Cooling Coil, Electric Heating Coil if required, Filter) ♦ Expansion Tank ♦ Chiller Water Pump ♦ Fresh Air Intake Fan ♦ Exhaust Fan ♦ Sand Trap Filter for Fresh Air (2) For Computer Room in Administration building ♦ Packaged Air Conditioning Unit with Air Cooled Condenser (Specially for Computer Room use) ♦ Sand Trap Filter for Fresh Air


3.1.5 Local Control Building (LCS-51)

♦ Window Type Air Conditioner

3.1.6 SS-55/SIH-55 & SS-503/SIH-75

♦ Air Cooled Condensing Unit (on the roof top) ♦ Single Zone Air Handling Unit (for Multi Zone AC System) ♦ (Supply Fan, Direct Expansion Coil, Pre and After Filter, Mixing Box) ♦ Humidifier ♦ Electric Duct Heater ♦ Fresh Air Intake Fan ♦ Sand Trap Filter for Fresh Air

3.2 Sparing Philosophy for HVAC Equipment

3.2.1 Satellite Instrument Houses, Local Control Buildings (LCS-58 & 59), Control Room in SS-A, SS-55/SIH-55 & SS-503/SIH-75, Substation-56 (SS-56)

Two sets of the following equipment shall be provided, each shall have 100% required capacity respectively.

♦ Air Cooled Condensing Unit ♦ Air Handling Unit ♦ Fresh Air Intake Fan

3.2.2 Substation and GIS Room & AC/DC Room in SS-A Total capacity of Split Type Air Conditioners shall be more than 120% of required capacity. 3.2.3 Main Building Total capacity of Air Handling Unit, Air Cooled Water Chiller, Chiller Water Pump etc. shall be more

than 120% of required capacity.

4. TESTING, ADJUSTING AND BALANCING The following works shall be included.

♦ Calibration/sequence check of control system ♦ Test running of all equipment ♦ Air balancing ♦ Performance test of all equipment ♦ Room temperature/humidity measurement ♦ Room noise measurement

Subcontractor shall complete the Test Run Records shown in Attachment-2.

5. MINIMUM REQUIREMENT FOR HVAC EQUIPMENT

5.1 General

(1) HVAC equipment shall be a prime quality, commercial grade product.

(2) HVAC equipment shall be long-term proven equipment. Prototype equipment is unacceptable.


5.2 Air Handling Units

(1) Units shall be basically assembled of fan sections, coil sections, filter sections and mixing boxes. Humidifier sections shall be provided, as required.

(2) Units shall be constructed of double-skin galvanized casing lined internally with 25 mm thick insulation.

(3) Coils shall be constructed of bare copper tube fitted with aluminum fins.

(4) Fan motors shall be TEFC (Totally Enclosed Fan Cooled) and shall have class F insulation with B temperature rise”.

5.3 Air Cooled Condensing Units

(1) Units shall be factories assembled, pre-piped and pre-wired. Units shall be composed of compressors, condensers, condenser fans, refrigerant pipes and control panels.

(2) Coils shall be constructed of copper tube fitted with aluminum fins. The manufacturer’s recommended coating systems on coils shall be adopted.

(3) Condenser fan motor shall be of TE (Totally Enclosed) or TEFC (Totally Enclosed Fan Cooled).

(4) Control panels shall house circuit breakers, fuses, motor contactors, high and low pressure switches, time guard systems, relays, internal wiring and terminals.

(5) Remote alarm terminal shall be provided.

5.4 Single Packaged Air Conditioner

(1) Units shall be factories assembled, pre-piped and pre-wired. Units shall be composed of compressors, fans, air filters, coils, condensers, refrigerant pipes and control panels.

(2) Evaporator fan motors shall be TEFC (Totally Enclosed Fan Cooled) and shall have class F insulation with B temperature rise”.

(3) Evaporator coils shall be constructed of bare copper tube fitted with aluminum fins.

(4) Condenser coils shall be constructed of copper tube fitted with aluminum fins. The manufacturer7s recommended coating systems on coils shall be adopted.

(5) Condenser fan motors shall be of TE (Totally Enclosed) or TEFC (Totally Enclosed Fan Cooled).

(6) Control panels shall house circuit breakers, fuses, motor contactors, high and low pressure switches, time guard systems, relays, internal wiring and terminals.

(7) Remote alarm terminal shall be provided.

5.5 Split Type Air Conditioners / Window Type Air Conditioners 5.5.1 Existing Train-3 & 4

(1) Units shall be of manufactured standard.

(2) Units shall be of heat pump type.

(3) Remote control switches shall be provided for Split Type Air Conditioners.

5.5.2 For Train-5 CCB Modification (1) Units shall be of industrial type which is suitable for outdoor environment service such as LNG

Plant and Refinery Plant, subject to Company’s approval (For example, hersite coating or equal on condenser coils, heavy gauge hot dip galvanized casing of outdoor units, etc).

(2) Unit shall be of cooling type.

(3) Remote control switches shall be provided for Split Type Air Conditioners.


5.6 Electric Duct Heaters

(1) Electric duct heaters shall be of slip-in or flange connection type, completed with factory wired control systems.

(2) Heating elements shall be fin sheathed type.

(3) Heaters shall be controlled by the step ON-OFF action.

(4) Control panels shall be equipped with circuit breakers, fuses, magnet contactors, high temperature cut-outs, air flow switches, relays, internal wiring and terminal blocks.

5.7 Fans

(1) Fan motor shall be TEFC (Totally Enclosed Fan Cooled) and shall have class F insulation with B temperature rise”.

(2) Centrifugal fans shall be provided with a vibration isolator, companion flanges, and belt guard. (3) Roof fans shall be provided with safety disconnect switches.

6. ATTACHMENTS

Attachment-1: Basic HVAC Flow Scheme

Attachment-2 : Test Run Record

RGX-S-61-1340-101 Part 1

Documents

Transcript of RGX-S-61-1340-101 Part 1