ENGINEERING MANUAL

Industrial process air conditioning

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Engineering ManualEngineering Manual

SYSTEM OVERVIEW

NRPR The Refrigeration, Purification and Recirculation (NRPR) unit is designed to recirculate constantly tempered and cleansed air throughout a designated room area, to meet or exceed the critical conditioning and purification performance demanded by industry standards.

High efficiency air purification is accomplished through the use of chemical filters section in combination with ASHRAE* rated particulate filter elements. Chemical Media By PureAir Filtration.

The NRPR unit is fully compatible with other pressurization, air filtration, and environmental monitoring and control systems. This interfacing capability coincides with our objective to eliminate the inherent conflict potential at theinterface between the HVAC, air filtration, and construction technologies. Maximum design flexibility within the framework ofstandardization offers an opportunity to continuously and simultaneously control temperature, humidity, air purity, andair flow within a dedicated operating environment.

The NRPR system offers unique 1. 2. 3.

Specialized air-conditioning and refrigeration system including gas-phase chemical purification. Complete self-contained system requiring only power and water hookup. High-sealing integrity of the exterior and self-purging interior to ensure high reliability in the most severe environments. Superior design meeting installation requirements for severe industrial environments. 4.

Complete system automation (including integrated control of temperature, humidity air distribution, and air quality)provides the highest level of equipment reliability for up flow or down flow air supply. Unit installation can be either insideor outside the protected space.

NIAT The Industrial Air Treatment (NIAT) unit is designed to recirculate constantly tempered air throughout a designated room area.

The mode of operation and the benefits of the NIAT system are similar to the NRPR system but the NIAT system does not provide high efficiency gas-phase air purification.

The NRPR/NIAT units have been especially designed for a leak proof construction with strength, ruggedness and heavyduty usage compared to commercial grade air conditioning systems. Its rugged Penta-Post frame design, built-inredundancy, and high quality materials, finish, and workmanship are in response to a range of broad and repetitive fieldrequirements.

The system is uniquely suited for industrial applications due to their high performance, excellent functional design, superior heavy duty components and built-in allowance for operating variances.

The NRPR/NIAT units are designed with sufficient latent heat capacity (low sensible heat ratio) to enable high moisture removal from humid environments present in industrial applications. This design coupled with the provision for outdoor pressurization air intake is typically not available with other systems.

CONFIGURATION

Pressurization Air

Outdoor Air

The above configuration is specifically used with other Dymanic Air Tech High Density Units (HDU/DAU) for rooms that require chemical filtration for pressurization / recirculation. Installing the equipment outside the protected space allows the designer to redeem expensive floor space inside the protected area for additional equipment.

* American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc.

HDU/DAU

NRPR/NIAT

ROOM

 

 

 

 

Engineering Manual

FEATURES

Exclusive dual filtration system with PureAir Filtration’s chemical media and particulate high-efficiency filters.

Flexibility for inclusion of a wide selection of components and accessories

Rugged 12/14 GA steel Penta-Post frame construction - with minimum 16 GA panels

Modular system design with separate compressor and plenum sections

Designed with detachable plenum and compressor section

DX or Chilled Water System, Cu-Cu, Cu-Al, SS-SS, and others.

Cooling coil sized for optimum sensible and latent cooling capacity

Interlaced coil circuiting to maximize coil surface and provide even air flow across surface on DX systems

Coils available with special anti-corrosive protective coatings including BLYGOLD®, HYPOXY® and HERESITE

Standard units provided with semi-hermetic Discus or Bitzer compressors with pump down. Capacity control as

required with cylinder unloading and Hot Gas bypass

Electric reheat for heating and dehumidification control

Heat rejection capability with outdoor air cooled condensers or water cooled self-contained shell & tube

condensers. Provision for mechanically cleaning water cooled units

Water regulating valves provided on all water cooled systems

FC Blowers - Belt driven

Up Flow or Down Flow configurations

Close control - + 2 F on temperature and + 5% on relative humidity

Alarm annunciation for fan failure

*

*

*

*

*

*

*

*

*

*

*

*

*

*

*

*

OPTIONS APPLICATIONS

• • • • •

Hermetic or Scroll Compressors

Microprocessor based controller

Customized Humidification Package

Customized Reheat Package

Protective coil coatings, BLYGOLD®,

THERMOGUARD® HYPOXY® or HERESITE

Refrigeration Pressure Gauges (DX units only)

Filter Pressure Gauges

Floor stand (down flow units)

Capacity control with cylinder unloading

(semi-hermetic compressors only)

Extended lube lines for pillow block bearings

Internal weatherization Fused Main Disconnect

Weatherization (outdoor installation)

50% to 100% Redundancy on critical components

Stainless steel construction

* OIL REFINERIES

* PULP AND PAPER MILLS

* PETROCHEMICAL PLANTS

* OFF-SHORE PLATFORMS

• • • •

* TEXTILE PLANTS

* PHARMACEUTICALS

* MINING

• • • • • •

* AERONAUTICAL

* POWER PLANTS

* TELECOMMUNICATIONS

* LABORATORIES

 

 

 

 

Engineering Manual

MODEL DESIGNATION

NRPR/NIAT NRefrigeration, Purification, Recirculation / NIndustrial Air Treatment

Units

1. Product Designation 8. Reheat Capacity (KW) NIATM / NRPRM -- Microprocessor Control 015 – 15 KW 020 – 20 KW 030 – 30 KW 035 – 35 KW 050 – 50 KW

2. No. of Circuits 070 – 70 KW 100 – 100 KW

3. Nominal Tonnage 140 – 140 KW 175 – 175 KW

04 – 4 Tons 210 – 210 kw 06 – 6 Tons 08 – 8 Tons X – No Reheat 10 – 10 Tons 15 – 15 Tons 9. Humidification (Lb/h) 20 – 20 Tons 30 – 30 Tons 005 – 5 lb./h 40 – 40 Tons 010 – 10 lb./h 50 – 50 Tons 015 – 15 lb./h 60 – 60 Tons 020 – 20 lb./h 025 – 25 lb./h

4. Refrigeration Type 030 – 30 lb./h 050 – 50 lb./h

A – Air Cooled 075 – 75 lb./h W – Water Cooled 100 – 100 lb./h G – Glycol Cooled 150 – 150 Lb./h C – Chilled Water 200 – 200 lb./h

5. Air Flow Direction X – No Humidifier U – Up Flow 10. Coil Coating D – Down Flow

Y - HyPoxy 6. Power Supply B – Blygold

H – Heresite Coated 63 – 208/230V-3P-60Hz T – Thermoguard 64 – 460V-3P-60Hz X – No Coating 65 – 575V-3P-60Hz 53 – 380V-3P-60Hz 11. Design Version 54 – 400V-3P-60Hz

7. Compressor Type 12. Special customs Options H - Semi-Hermetic C – Hermetic Z – Scroll

NRPRM – 2 – 60 – A – U – 63 – Z – 050 – 030 – B – D – XXX 1 2 3 4 5 6 7 8 9 10 11 12

 

 

 

 

Engineering Manual

60 Hz

Single Circuit Model NRPR / NIAT 104 106 108 110 115 120 130 140 150 160

Cooling Capacity (Net) Btu/h*

Total 48075 61340 89880 106880 169565 238030 332800 424570 622315 N/A

Sensible 35095 46620 65610 79090 125480 176145 249600 318425 466740 N/A

Sensible Heat Ratio (SHR) 0.73 0.76 0.73 0.74 0.74 0.74 0.75 0.74 0.75 N/A

Compressor Accessible Hermetic

Model NRB2

0400

2DD3

0500

2DA3

0750

3DA3

0750

3DS3

1500

4DH3

2500

6DW3

3000

6DS3

4000

8DS1

6000

N/A

Type Reed Discus Discus Discus Discus Discus Discus Discus Discus N/A

Total Heat Rejection Btu/h 70430 90076 127455 153738 242929 339742 473415 619524 883010 N/A

Quantity 1 1 1 1 1 1 1 1 1 N/A

Dual Circuit Model NRPR /NIAT 204 206 208 210 215 220 230 240 250 260

Cooling Capacity (Net) Btu/h*

Total 39355 64415 96025 108770 180520 214975 339085 475455 565155 683805

Sensible 28730 48955 70095 80490 133590 159080 254315 351835 423865 519690

Sensible Heat Ratio (SHR) 0.73 0.76 0.73 0.74 0.74 0.74 0.75 0.74 0.75 0.76

Compressor Accessible Hermetic

Model KAKA ERF1 NRB2 2DC3 2DA3 3DA3 3DS3 4DH3 4DJ3 6DH3

0200 0311 0400 0500 075 0750 1500 2500 3000 3500

Type Reed Reed Reed Discus Discus Discus Discus Discus Discus Discus

Total Heat Rejection Btu/h 58402 98526 140860 155376 254910 307476 485858 679484 808198 974976

Quantity 2 2 2 2 2 2 2 2 2 2

Reheat

Type Electric

Capacity (Btu/h) 51195 68260 102390 119455 170650 238910 341300 477820 631405 682600

kW 15 20 30 35 50 70 100 140 185 200

Humidification

Capacity (lb./h) ** 5 8 10 14 20 30 50 75 85 100

kW (Max) 1.7 3.4 3.4 5.1 6.8 10.2 17.2 26 34.3 34.3

Control Range (lb./h) 2 - 5 2 - 10 2 - 10 2 - 15 4 - 20 6 - 30 10 - 50 15 - 75 20-101 20-101

Model Series MES-U MES-U MES-U MES-U MES-U MES-U NHB NHB NHB NHB

Nominal Model Size 5 10 10 15 20 30 50 75 100 100

Type Electrode Steam

Control Modulation / Cycling On-Off

 

 

 

 

Engineering Manual

60 Hz

Model N RPR /N IAT 104 204

106 206

108208

110210

115215

120220

130 230

140 240

150 160250 260

Evaporator Blower

Air Flow (CFM) 1600 2400 3200 4000 6000 8000 12000 16000 20000 24000

External Static (in. of water) 1 1 1 1 1 1 1 1 1 1

Motor H.P 3 5 5 7.5 10 7.5 10 15 15 20

Type Centrifugal

Wheel DWDI

Blades FC FC FC FC FC FC FC FC FC FC

Blower Model ATLI ATLI ATLI ATLI ATLI ATLI ATLI ATLI ATLI ATLI

7-7 7-7 10-7 10-8 12-12 10-8 12-12 15-11 18-13 18-18

Quantity (Motors & Blowers) 1 1 1 1 1 2 2 2 2 2

Drive Belt Driven

Evaporator Coil

Type Fin / Tube

Material Al / Cu, Cu/Cu

Configuration V - Coil

Drain Pan Material Stainless Steel

Fin Type Corrugated Rippled

Circuiting (single circuit) Standard

Circuiting (dual circuit) Interlaced

Entering Air

DBT/WBT Deg F

78.0 /

65.0

78.0 /

65.1

78.0 /

65.2

78.0 /

65.3

78.0 /

65.4

78.0 /

65.5

78.0 /

65.6

78.0 /

65.7

78.0 / 78.0 /

65.8 65.9

Leaving Air

DBT/WBT Deg F -N RPR Unit

54.8/

53.8

55.6 /

54.7

55.3 /

54.1

56.0 /

54.7

55.5 /

54.4

55.7 /

54.4

55.8 /

54.4

55.3 /

54.4

55.9 / 56.0 /

54.7 55.0

Leaving Air

DBT/WBT Deg F -N IAT Unit

54.8 /

53.8

55.3 /

54.1

54.9 /

53.8

56.2 /

54.7

55.1 /

54.4

55.1 /

54.4

55.3 /

54.4

55.0 /

54.1

55.3 / 56.4 /

54.4 55.0

Surface Area (sq. ft.) NRPR 5.4 7.1 9.6 11.6 18.3 22.5 31.2 41.2 50.6 66.6

Surface Area (sq. ft.) NIAT 5.4 5.4 6.6 8.7 13.7 16.2 23.7 33.7 42.5 50.0

Optional (HyPoxy® / Blygold® / Heresite/Thermoguard/) Coating

Operating Chrg R-22 - NRPR 3.0 lb. 3.9 lb. 5.2 lb. 6.4 lb. 10.0 lb. 12.3 lb. 17.0 lb. 22.4 lb. 27.4 lb. 32.2 lb.

Operating Chrg R-22 - NIAT 3.0 lb. 4.5 lb. 5.5 lb. 6.0 lb. 9.4 lb. 11.1 lb. 16.1 lb. 22.9 lb. 28.8 lb. 33.8 lb.

Outdoor Air Cooled Condensers

95 Deg F Max Ambient DSP DSP 07

4.9

DSP 010

5.8

DSP 010

5.8

DSP 020

12

DSP 025

17

DSP 035

26

DSP 042

34

DSP N/A 065 Single Circuit Models 05

Summer Charge R-22 (lb.) 3.3 46 N/A

Winter Charge R-22 (lb.) 11 16 19 19 38 57 85 112 150 N/A

DSP DSP DSP DSP DSP 020

DSP 025

DSP 035

DSP 040

DSP DSP Dual Circuit Models 05 07 010 012 060 065 Summer Charge R-22 (lb.) 3.3 4.9 5.8 5.8 12 12 26 26 46 43

Winter Charge R-22 (lb.) 11 16 19 19 38 38 85 85 150 140

Fan Diameter (inches) 20 20 30 30 30 30 30 30 30 30

Fan RPM 1100 1100 825 825 825 825 825 825 825 825

Quantity of Fans 1 1 1 1 2 2 3 3 4 5

 

 

 

 

Engineering Manual

60 Hz

Model N RPR / NIAT 104 204

106 206

108 208

110210

115215

120220

130 230

140 240

150 250

160260

Water Cooled Condensers

85 Deg F Max Entering Water

Type Shell & Tube

Single Circuit Models HSE2-4 HSE3-6 HSE5 HSE5 HSE7 HSE10 HSE15 HSE20A HSE25A N/A

Leaving Water

Temperature (Deg F) 103.8 109.8 108.3 105.8 108.7 106.1 107.4 104.1 101.6 N/A

Flow Rate (GPM) 7.5 7.3 11.0 14.9 20.6 32.4 42.5 65.1 106.9 N/A

Pressure Drop (psig)

Condenser 3.2 4.4 1.1 2.0 4.3 7.3 5.6 3.1 5.5 N/A

Quantity of Condensers 1 1 1 1 1 1 1 1 1 N/A

Operating Charge R-22 (lb.) 1.2 1.6 1.8 1.8 2.7 2.5 4.6 6.1 5.6 N/A

Water Regulating Valve V46

AA-1C

V46

AA-1C

V46

AD-1C

V46

AD-1C

V46

AE-1C

V45

AE-1C

V46

AS-2C

V46

AS-2C

V46

AS-2C

N/A

Pressure Drop (psig) Valve 12.5 11.0 1.0 2.5 2.5 6.5 2.5 9.0 23.5 N/A

Pressure Drop (psig) Total 15.6 15.4 2.1 4.5 6.8 18.8 8.1 12.1 28.9 N/A

HSE2-4 HSE2-8 HSE2-4 HSE3-6 HSE5 HSE5 HSE7 HSE10 HSE15 HSE15 Dual Circuit Models

Leaving Water

Temperature (Deg F) 113.8 114.9 103.8 111.9 108.3 105.8 108.7 104.1 109.9 106.9

Flow Rate / Condenser

Circuit (GPM) 2.0 3.3 7.5 5.8 11.0 14.8 20.6 32.4 32.6 44.8

Flow Rate Total (GPM) 4.0 6.6 15.0 11.6 22.0 29.6 41.2 64.8 65.2 89.6

Pressure Drop (psig) 0.3 4.9 3.2 2.9 1.1 2.0 4.3 7.3 3.4 6.2

Quantity of Condensers 2 2 2 2 2 2 2 2 2 2

Operating Charge

R-22 (lbs) / Circuit 1.2 1.2 1.2 1.2 1.8 1.8 2.7 2.5 4.6 4.6

Operating Charge

R-22 (lb.) / Total 2.4 2.4 2.4 2.4 3.6 3.6 5.4 5.0 9.2 9.2

Water Regulating

Valve

V46

AA-1C

V46

AA-1C

V46

AA-1C

V46

AB-1C

V46

AD-1C

V45

AD-1C

V46

AE-1C

V46

AE-1C

V46 V46

AS-2C AS-2C

Pressure Drop (psig) Valve 0.5 2.0 12.5 3.0 0.5 2.5 2.5 7.3 0.8 3.0

Pressure Drop (psig) Total 0.8 6.9 15.6 5.8 1.6 4.5 6.8 14.6 4.1 9.2

 

 

 

 

Engineering Manual

60 Hz

Model NRPR / NIAT 104 204

106206

108208

110210

115215

120220

130 230

140 240

150250

160260

Filters

Velocity (FPM) 375 375 375 375 375 375 375 375 375 375

Roughing Pre-Filter - NRPR

12 X 24 X 2 30% 1 - 1 - - - 2 - 2 2

20 X 24 X 2 30% 1 2 2 2 - 8 - 2 16 2

24 X 24 X 2 30 % - - - 1 4 - 8 10 - 14

Roughing Pre-Filter - NIAT

12 X 24 X 2 30% 1 1 - - - - 2 - - -

20 X 24 X 2 30% 1 1 2 - - 6 - 2 - -

24 X 24 X 2 30% - - - 2 3 - 6 8 12 14

Gas/Chemical Filter By PureAir Filtration ***

PP-18 Modules ***

(NRPR units only)

5 6 8 10 16 26 36 46 56 66

Roughing After Filter - NRPR Units

12 X 24 X 2 30% 1 - 1 - - - 2 - 2 2

20 X 24 X 2 30% 1 2 2 2 - 8 - 2 16 2

24 X 24 X 2 30% - - - 1 4 - 8 10 - 14

Intermediate After Filter - NRPR

12 X 24 X 4 60% 1 - 1 - - - 2 - 2 2

20 X 24 X 4 60% 1 2 2 2 - 8 - 2 16 2

24 X 24 X 4 60% - - - 1 4 - 8 10 - 14

OR

Intermediate After Filter - NRPR Units

12 X 24 X 4 90% 1 - 1 - - - 2 - 2 2

20 X 24 X 4 90% 1 2 2 2 - 8 - 2 16 2

24 X 24 X 4 90% - - - 1 4 - 8 10 - 14

Intermediate After Filter - NIAT Units

12 X 24 X 4 60% 1 1 - - - - 2 - - -

20 X 24 X 4 60% 1 1 2 - - 6 - 2 - -

24 X 24 X 4 60% - - - 2 3 - 6 8 12 14

OR

Intermediate After Filter - NIAT Units

12 X 24 X 4 90% 1 1 - - - - 2 - - -

20 X 24 X 4 90% 1 1 2 - - 6 - 2 - -

24 X 24 X 4 90% - - - 2 3 - 6 8 12 14

* Rating Conditions - -

72 Deg F DB / 60 Deg F WB Outdoor Ambient 95 Deg F DB / 80 Deg F WB 45 Deg F Evaporating TemperatureBlower Motor Heat Deducted 25% Outdoor Air

- - -

** Standard Humidifier Capacity suitable for 14 Deg F (-10 Deg C) & 10% Outdoor Air Due to the wide range of outdoor air intake conditions, alternate humidifer to be selected as required for the application

*** PureAir Filtration´s Chemical Medias: CPS Blend, PureAir 8, PureAir AC-X, Ammoniasorb, Carbosorb, Sulphasorb.

Engineering Manual

 

 

 

 

Up Flow Arrangement

Figure 1-A Figure 2-A

Down Flow Arrangement

 

 

 

 

Engineering Manual

NRPR / N IAT UNIT DIMENSIONS & WEIGHTS

NRPR MODEL Description

Dim.

104 204

106 206

108 208

110 210

115 215

120 220

130 230

140 240

150 250

160 260

Drawing Ref. (Figure) - Up Flow 1-A 1-A 1-A 1-A 1-A 2-A 2-A 2-A 2-A 2-A Drawing Ref. (Figure) - Down Flow 1-B 1-B 1-B 1-B 1-B 2-B 2-B 2-B 2-B 2-BLength L 62 70 82 94 126 110 138 174 206 234 Height H 107 111 116 116 119 119 122 126 131 131 Depth D 32 32 32 32 32 52 52 52 52 52 Plenum Section Height PS 23 27 27 27 27 32 32 32 32 32 Plenum Section Width L 62 70 82 94 126 110 138 174 206 234 Plenum Opening Height Q 16 20 20 20 20 25 25 25 25 25 Plenum Opening Length N 58 66 78 90 122 106 134 170 202 230 Plenum Location (in width) M 2 2 2 2 2 2 2 2 2 2 Plenum Location (in height) P 5 5 5 5 5 5 5 5 5 5 Blower Opening (in length) B 10.0 10.0 10.0 11.0 16.0 11.0 16.0 15.0 18.0 22.0 Blower Opening (in depth) G 9.0 9.0 12.0 12.0 14.0 12.0 14.0 16.0 19.0 19.0Blower(s) Location (in length)

A 13.0 17.0 10.0 28.5 42.0 20.0 24.0 36.0 46.0 51.0 C N/A N/A N/A N/A N/A 20.0 30.0 40.0 50.0 60.0 E 39.0 43.0 49.0 54.5 68.0 48.0 52.0 68.0 74.0 79.0

Blower(s) Location (in depth) F 3.2 3.2 3.2 3.2 3.2 14.0 12.0 6.6 7.0 7.0 J 19.7 19.7 16.7 16.7 14.7 26.0 26.0 29.3 26.0 26.0

Recommended Clearance (air section) S 26 20 20 20 20 20 20 20 20 20 Recommended Clearance (compressor sect.) T 24 24 24 24 24 36 36 36 36 36 Recommended Clearance (front) U 28 28 28 28 28 28 28 28 28 28Line Sizes - Single Circuit Suction Line (inches) 1-1/8 1-3/8 1-3/8 1-3/8 1-5/8 2-1/8 2-1/8 2-1/8 2-5/8 N/ALiquid Line (inches) 1/2 5/8 5/8 7/8 7/8 7/8 1-1/8 1-1/8 1-3/8 N/A Discharge Line (inches) 5/8 7/8 1-1/8 1-1/8 1-1/8 1-3/8 1-5/8 1-5/8 1-5/8 N/ALine Sizes - Dual Circuit Suction Line (inches) 7/8 1-1/8 1-1/8 1-3/8 1-3/8 1-3/8 1-5/8 2-1/8 2-1/8 2-1/8Liquid Line (inches) 3/8 3/8 1/2 5/8 5/8 7/8 7/8 1-1/8 1-1/8 1-1/8Discharge Line (inches) 1/2 5/8 5/8 7/8 1-1/8 1-1/8 1-1/8 1-3/8 1-3/8 1-5/8Weight (with P u r e a i r 8 Media) Single Circuit (lb.) 2627 2950 3239 3561 4379 5117 6035 7184 8403 N/A Dual Circuit (lb.) 2649 3002 3375 3823 4706 5433 6285 7524 8698 9671NIAT MODEL Description

Dim.

104 204

106 206

108 208

110 210

115 215

120 220

130 230

140 240

150 250

160 260

Drawing Ref. (Figure) - Up Flow 1-A 1-A 1-A 1-A 1-A 2-A 2-A 2-A 2-A 2-ADrawing Ref. (Figure) - Down Flow 1-B 1-B 1-B 1-B 1-B 2-B 2-B 2-B 2-B 2-BLength L 62 62 70 78 102 90 114 150 178 202 Height H 89 93 98 98 101 101 104 108 113 113 Depth D 32 32 32 32 32 52 52 52 52 52 Plenum Section Height PS 23 27 27 27 27 32 32 32 32 32Plenum Section Width L 62 62 70 78 102 90 114 150 178 202 Plenum Opening Height Q 16 20 20 20 20 25 25 25 25 25 Plenum Opening Length N 58 58 66 74 98 86 110 146 174 198 Plenum Location (in width) M 2 2 2 2 2 2 2 2 2 2 Plenum Location (in height) P 5 5 5 5 5 5 5 5 5 5 Blower Opening (in length) B 10.0 10.0 10.0 11.0 16.0 11.0 16.0 15.0 18.0 22.0 Blower Opening (in depth) G 9.0 9.0 12.0 12.0 14.0 12.0 14.0 16.0 19.0 19.0Blower(s) Location (in length)

A 13.0 17.0 10.0 28.5 42.0 20.0 24.0 36.0 46.0 51.0C N/A N/A N/A N/A N/A 20.0 30.0 40.0 50.0 60.0E 39.0 43.0 49.0 54.5 68.0 48.0 52.0 68.0 74.0 79.0

Blower(s) Location (in depth) F 3.2 3.2 3.2 3.2 3.2 14.0 12.0 6.6 7.0 7.0J 19.7 19.7 16.7 16.7 14.7 26.0 26.0 29.3 26.0 26.0

Recommended Clearance (air section) S 26 20 20 20 20 20 20 20 20 20 Recommended Clearance (compressor sect.) T 24 24 24 24 24 36 36 36 36 36Recommended Clearance (front) U 28 28 28 28 28 28 28 28 28 28 Line Sizes - Single Circuit Suction Line (inches) 1-1/8 1-3/8 1-3/8 1-3/8 1-5/8 2-1/8 2-1/8 2-1/8 2-5/8 N/ALiquid Line (inches) 1/2 5/8 5/8 7/8 7/8 7/8 1-1/8 1-1/8 1-3/8 N/A Discharge Line (inches) 5/8 7/8 1-1/8 1-1/8 1-1/8 1-3/8 1-5/8 1-5/8 1-5/8 N/A Line Sizes - Dual Circuit Suction Line (inches) 7/8 1-1/8 1-1/8 1-3/8 1-3/8 1-3/8 1-5/8 2-1/8 2-1/8 2-1/8Liquid Line (inches) 3/8 3/8 1/2 5/8 5/8 7/8 7/8 1-1/8 1-1/8 1-1/8Discharge Line (inches) 1/2 5/8 5/8 7/8 1-1/8 1-1/8 1-1/8 1-3/8 1-3/8 1-5/8Weight (with PureAir 8 Media) Single Circuit (lb.) 2477 2740 2969 3231 3809 4277 4895 5744 6603 N/A Dual Circuit (lb.) 2499 2792 3105 3493 4136 4593 5145 6084 6898 7571

 

 

 

 

Engineering Manual

PureAir Filtration´s Chemical Media

What is Chemical Media? Alliance’s N Refrigeration, Purification and Recirculation (NRPR) unit achieves the highest levels of purification in industry by using

Chemical Media is a proven filter media which provides continuous purification of corrosive, odorous and toxic contaminants in industrial and commercial environments. C h e m i c a l M e d i a combines the adsorption properties of activated carbon with the oxidation properties of chemically impregnated alumina. There are different media types which have different chemical compositions.

PureAir 8 The PureA i r 8 is produced in 1/8” diameter spherical purple pellets and composed of activated alumina impregnated with potassium permanganate. The chemical reaction of the PureAir 8 is very simple. The activated alumina collects odour molecules through adsorption and absorption. The odour molecules thereby come in contact with the potassium permanganate, which is evenly distributed throughout the pellets. The odour molecule is chemically oxidized to an odourless non-corrosive product.

PureAir AC-X The PureAir AC-X consists of a coal based activated carbon of 1/8” diameter cylinders. Physical adsorption removes the gas molecules, which is a form of condensation. Activated carbon is used for a wide range of contaminants with higher affinity to specific gases.

Ammoniasorb The Ammoniasorb is manufactured in 1/8” diameter cylinders and consists of activated carbon impregnated with phosphoric acid. Phosphoric acid is impregnated into the carbon to provide enhanced efficiency and capacity for base type molecules. After adsorption, a chemical reaction follows to neutralize the contaminants.

Carbosorb TheCarbosorb is manufactured in 1/8” diameter cylinders and consists of activated carbon impregnated with potassium hydroxide. Potassium hydroxide is impregnated into the carbon to provide enhanced efficiency and capacity for acid type molecules. After adsorption, a chemical reaction follows to neutralize the contaminants.

Industrial and Commercial Applications The chemical Medias are used to control corrosive gases such as SO2, H2S, CL2 and NH3 which attack delicate process control equipment in heavy industry. In light industry, it is used to eliminate malodorous and nuisance odors which affect people’s health

The PureAir Filtration´s Chemical Medias are very efficient in the commercial and institutional sectors where airborne contaminants are created from human activities, operating equipment, furniture, construction materials and outdoor contaminants. A controlledenvironment will protect people’s health and improve their comfort and productivity.

Physical Properties Superior Crush Strength Due to proprietary production procedures, Chemical media pellets are uniform and of a

high crush strength. Their dusting threshold is higher, thus abrasion loss is kept to a minimum.

Superior Pore Structure Continuous advances in production procedures has resulted in the highest possible leveof media porosity. This provides more vacancy for the migration of contaminants, highersustained efficiency and longer effective life.

Chemical Media PureAir 8, Ammoniasorn and Carbosord do not desorb contaminants under surge conditions or sudden temperature/humidity changes.

Superior Retentivity

Temperature Range From -40°F to 120°F From -40°C to 48.9°C

Humidity Range From 10% to 95%

Contamination Concentration From 0 to 25 ppm

Certified Laboratory Analytical follow-up through our Laboratory is one of the many services offered by P u r e A i r F i l t r a t i o n . To ensure maximum efficiency of our products, a report establishing media consumption rate and performance is provided.

 

 

 

 

Engineering Manual

WATER COOLED

AIR COOLED

 

 

 

 

Engineering Manual

60 Hz - AIR / WATER COOLED

NRPR / NIAT MODELS

AIR COOLED CONDENSER

Acce

ssib

le H

erm

eti

c

Models HP

DSP05 1/2 2.6 3.3 5 1.3 1.6 3 0.6 0.8 2

DSP07 1/2 2.6 3.3 5 1.3 1.6 3 0.6 0.8 2

DSP010 1 4.4 5.0 10 2.0 2.5 5 1.6 2.0 4

DSP012 1 4.4 5.0 10 2.0 2.5 5 1.6 2.0 4

DSP020 1 8.8 11.0 15 4.0 5.0 10 3.2 4.0 10

DSP022 1 8.8 11.0 15 4.0 5.0 10 3.2 4.0 10

DSP025 1 8.8 11.0 15 4.0 5.0 10 3.2 4.0 10

DSP035 1 13.2 16.5 25 6.0 7.5 10 4.8 6.0 10

DSP040 1 13.2 16.5 25 6.0 7.5 10 4.8 6.0 10

DSP045 1 13.2 16.5 25 6.0 7.5 10 4.8 6.0 10

DSP055 1 17.6 22.0 35 8.0 10.0 15 6.4 8.0 15

DSP060 1 17.6 22.0 35 8.0 10.0 15 6.4 8.0 15

DSP065 1 22.0 27.5 45 10.0 12.5 20 8.0 10.0 15

Power Supply 208-230/3/60 460/3/60

575/3/60 Code 63 64 65

FLA MCA MFS FLA MCA MFS FLA MCA MFS

Sin

gle

Cir

cuit

A

cce

ssib

le H

erm

eti

c

NRPR / NIAT 104

70.4

75.9

90 36.1 38.9 50

29.5

31.8 40

NRPR / NIAT 106

88.1

93.7

100

43.9

46.5

50

35.0

37.0

40

NRPR /NIAT 108

122.9

130.9

150 60.0 63.5 70

50.4

53.7 60

NRPR / NIAT 110

150.4

160.7

200 75.2 80.2 100

61.1

65.3 80

NRPR / NIAT 115

213.1

228.0

250 106.2 113.5 125

85.8

91.7 100

NRPR / NIAT 120

298.1

318.7

400 131.7 142.0 175

121.7

130.3 150

NRPR / NIAT 130

409.0

435.3

500

179.5

192.6

225

162.4

172.4

200

NRPR / NIAT 140

N / A

N / A

N /A 283.9 301.7 300

224.3

237.6 250

NRPR / NIAT 150

N / A

N / A

N / A 334.2 362.2 450

296.0

316.0 350

NRPR / NIAT 160

N / A

N / A

N / A N / A N / A N / A

N / A

N / A N / A

Du

al

Cir

cuit

NRPR / NIAT 204

62.2

63.9

70 30.8 31.6 30

N / A

N / A N / A

NRPR / NIAT 206

90.6

93.7

100 45.0 46.4 50

N / A

N / A N / A

NRPR / NIAT 208

134.5

140.0

150 68.5 71.3 80

57.1

59.4 60

NRPR / NIAT 210

154.0

159.6

175 76.0 78.6 80

61.6

63.6 70

NRPR / NIAT 215

217.5

225.5

250 105.4 108.9 110

92.0

95.3 100

NRPR / NIAT 220

297.9

308.2

300

130.6

135.6

150

123.5

127.6

125

NRPR / NIAT 230 423.2 438.1 450 185.0 192.3 200 174.4 180.3 200

NRPR / NIAT 240

N / A

N / A

N / A 295.1 305.4 300

244.4

253.0 250

NRPR / NIAT 250

N / A

N / A

N / A 316.2 328.0 350

301.0

310.8 350

NRPR / NIAT 260

N / A

N / A

N / A 406.0 419.4 450

332.8

343.4 350

 

 

 

 

Engineering Manual

 

 

 

 

Engineering Manual

Air Cooled Condensers - 60 Hz

Note: Galvanized Finish Standard. Consult factory for other materials, finishes and special features.

Model

Arrange- ment

L

W

H

A

B

C

D

E

Connection Weight (lb.) Single Circuit Dual Circuit

Net Flooded Dschrg Liquid Dschrg Liquid

DSP05 1 X 1 43 38 37 34 39 7/8 7/8 5/8 5/8 308 319

DSP07 1 X 1 43 38 37 34 39 7/8 7/8 7/8 5/8 335 351

DSP010

1 X 1

60

48

47

44

56 1-1/8 1-1/8 7/8

7/8

515 534

DSP012

1 X 1

60

48

47

44

56 1-1/8 1-1/8 7/8

7/8

525 544

DSP020

1 x 2

117

48

47

44

113 1-3/8 1-1/8 1-1/8

7/8

985 1023

DSP020

1 x 2

117

48

47

44

113 1-5/8 1-3/8 1-1/8

1-1/8

1005 1043

DSP025

1 x 2

117

48

47

44

113 1-5/8 1-3/8 1-1/8

1-1/8

1063 1120

DSP035

1 x 3

174

48

47

44

170 113 57 1-5/8 1-5/8 1-3/8

1-1/8

1460 1545

DSP040

1 x 3

174

48

47

44

170 113 57 2-1/8 1-5/8 1-3/8

1-3/8

1490 1575

DSP045

1 x 3

174

48

47

44

170 113 57 2-1/8 1-5/8 1-3/8

1-3/8

1570 1682

DSP055 1 x 4 231 48 47 44 227 113 114 2-1/8 1-5/8 1-3/8 1-3/8 2019 2169

DSP060 1 x 4 231 48 47 44 227 113 114 2-1/8 1-5/8 1-5/8 1-5/8 2071 2221

DSP065

1 x 5

288

48

51

44

284 113 58 113 2-1/8 2-1/8 1-5/8

1-5/8

2403 2543

 

 

 

 

Engineering Manual

GUIDE SPECIFICATIONS The N Refrigeration/Purification/Recirculation system OR N Industrial Air Treatment system shall be a Model N RPR/NIAT unit as manufactured by A L L I A NCE . The self-contained factory assembled (single/dual) circuit, (air/water) cooled unit shall be provided in an (up flow, down flow) configuration. It shall be designed for draw-through airarrangement, ensuring even air distribution across filter and coil face areas.

The NRPR /NIAT unit shall be capable of being used singularly or in conjunction with other series equipments.

It shall have a total cooling capacity of BTU/h, and a sensible cooling capacity of BTU/h, based on theentering condition of °F DB, and °F WB. The unit shall be supplied with a volt, phase, cycle power supply for operation at 1.0” External Static Pressure.

Unit Construction The NRPR/NIAT unit shall be constructed of minimum 16 gauge coated steel, in an insulated Penta-Post frame design. The Penta-Post frame construction shall be designed to be fully self-supporting, without relying on side panels and/or internal components forstructural integrity.

The unit casing shall have inner and outer walls constructed of heavy gauge, zinc-coated steel, with galvanized steel internal strutsas required. Rigid insulation (2 inch thick, 3.0 pound per cubic foot density) shall be mounted between panel walls. Insulation and adhesive system shall meet requirements of NFPA-90A.

Wall and roof panels shall be self-supporting, not requiring additional bracing. Floor-to-wall and wall-to-wall interfaces shall bespecially sealed for weather proofing and the prevention of high static pressure leakage.

Access doors shall be of heavy gauge, zinc-coated steel construction. They shall be sandwich panel type, and shall be insulated As described above. They shall be designed for flush mounting on unit casing, gasketed to provide a positive seal with opening latches. The internal and external surfaces of all sections shall be coated with a 3-part aliphatic polyurethane enamel finish. This coating system shall consist of one prime coat applied over chemically cleaned surfaces, followed by two finish coats. Final coating shall have excellent resistance to moisture and good protection if exposed to traces of acid or alkali fume, salt air or solvents for temperatures up to 200°F.

The unit shall be designed in such a way that access shall be provided to the electrical controls and refrigeration components withoutinterrupting the air flow.

Contaminant Removal Section This section shall be constructed of heavy gauge, zinc-coated steel in an insulated Penta-Post frame design. Each filter bank shall be designed for front access servicing. The filter housing shall have a high degree of sealing integrity resulting from factory installed filter tracks and filter seals. Ease and simplicity of filter maintenance shall result from the use of fully operable doors, equipped with a “quick opening” latch and handle assembly.

From the air entering side, the section shall include: a roughing pre-filter, a gas-phase filter section, a roughing after-filter, and a finalfilter.

Roughing Pre-filter Roughing pre-filters shall be 2” filters, consisting of reinforced fabric media in a preformed pleated design. The fabric media shall be laminated to supporting steel wire grip and sealed in a channeled heavy-duty galvanized steel enclosure frame.

Filters shall have a rated average efficiency of not less than 30% by ASHRAE Standard 52-76 test method, using atmospheric dust.Unit shall include: ( ) 24 x 24 x 2, ( ) 20 x 24 x 4 and ( ) 12 x 24 x 2 filters.

Gas-Phase Filter Section This section shall feature tracks designed to incorporate deep bed filter modules. All tracks shall have continuous gasketing

to prevent air bypass. Modules shall be coated with corrosion-resistant paint and shall be equipped with quick release covers

to facilitate media change-out.

 

 

 

 

Engineering Manual

GUIDE SPECIFICATIONS

The chemical filter medium shall be by PureAir Filtration type__________. Filter media type (or types) shall be selected from PureAir Filtration’s standard range of factory formulated media blends and shall be selected to provide the contaminant removal characteristics appropriate for the project conditions, as per the recommendations contained in ISA Standard S71.04. The supplied Chemical media shall be a specially blended combination of solid matrix and active impregnate designed for use in gas phase applications. It shall be capable of periodic life analysis via the Certified Laboratory to determine when the installed media requires replacement.

Roughing After-Filter Roughing after-filters shall be 2” filters, consisting of reinforced fabric media in a preformed pleated design. The fabric media shall be laminated to supporting steel wire grip and sealed in a channeled heavy-duty galvanized steel enclosure frame.

Filters shall have a rated average efficiency of not less than 30% by ASHRAE Standard 52-76 test method using atmospheric dust.Unit shall include: ( ) 24 x 24 x 2, ( ) 20 x 24 x 4 and ( ) 12 x 24 x 2 filters.

Fan Section Fan section shall be constructed of heavy-gauge zinc coated steel in an insulated Penta-Post frame design. It shall incorporate a forward-curved double width double inlet blower, having the capacity to deliver CFM, at “ w.g. External Static Pres-sure.

Fan shall be statically and dynamically balanced in the factory and given final testing with motor and drives in place.

Foot-mounted bearings on a structural steel framework integral with fan housing shall be pillowblock type with a minimum L10 life of100,000 hours at maximum operating conditions including belt pull.

Fan bearing shall be pre-lubricated at the factory. Motor shall be located out of the airstream within the service compartment andshall be totally enclosed, fan cooled, 1750 RPM, H.P. and operated at /3/60 voltage. Drive packageshall include belts sized at 130% of fan motor horsepower.

Fan section shall be positioned to draw the air over the thermal conditioning section, ensuring maximum coil performance and even

Thermal Conditioning - Cooling The thermal conditioning – cooling section shall be constructed of heavy gauge, zinc-coated steel in an insulated Penta-Post frame design. Evaporator shall be of V-frame design, copper tube aluminum finned, at a total of CFM, providing total coolingcapacity of Btu/h and a sensible cooling capacity of Btu/h. Circuiting shall be designed to distribute refrigerantfrom both circuits into both coil face areas. Coils shall be, standard (no treatment) / treated with coating forcorrosion resistance. Coils shall have a total face area of square feet.

Refrigeration Section The unit shall feature a direct expansion refrigeration system including (single/two) separate refrigeration circuits. Each circuit shall contain a heavy duty, cast-iron semi-hermetic ton serviceable compressor and shall utilize R-22 refrigerant. The compressor shall be mounted on vibration isolators. Also included shall be filter/driers, sight glasses, moisture indicators, solenoid and thermostatic expansion valves as well as hot gas bypass for each circuit.

The refrigeration section shall be located within the service compartment outside of the airstream so that purified and conditioned airdoes not flow over it. This shall also allow either compressor to be serviced during operation of the unit. In addition, the service compartment shall be purged and pressurized with a constant clean air source.

 

 

 

 

Engineering Manual

GUIDE SPECIFICATIONS

Water Cooled Condenser The water cooled condenser shall consist of a mechanically cleanable freshwater shell and tube condenser for heat rejection,designed for highly efficient heat transfer with maximum compressor protection, long operating life, and low first cost. The water cooled condenser shall have the following features and/or characteristics:

1) 2) 3) 4) 5) 6)

Heavy wall copper water tubes. Removable heads, cleanable from ends. No internal joints, thereby eliminating internal leaks. Ruggedly constructed brass-brazed heavy steel shell. No oil trapping; positive refrigerant velocity control. Also available with marine condensers for seawater applications.

Note: When specifying and NRPR/NIAT AIR COOLED MODEL, delete the paragraph above and replace with the AIR COOLED CONDENSER SPECIFICATION contained in the Optional Accessories Specification List.

Inlet Plenum Inlet Plenum section shall be constructed of heavy gauge, zinc-coated steel in an insulated Penta-Post frame design. Inlet plenum shall provide proper mixing of return and pressurization air, whether unit incorporates an up flow or down flow configuration.

OPTIONAL EQUIPMENT SPECIFICATIONS

Air Cooled Condenser The air cooled condenser shall be a CACMD / CACLD Series Model unit. Unit shall be constructed of heavy gauge,zinc-coated steel. Condenser shall operate on a /3/60 volt power supply and shall be designed for (indoor/outdoor)application. Condenser with (galvanized finish/painted finish).

Intermediate After-Filter, 60%For additional particulate filtration performance, the NRPR /NIAT system shall include a high efficiency, Mini-Pleat filter 4” deep filterlocated downstream of the standard filtration section. The extended surface pleated filters shall consist of water-resistant mediamade from ultra-fine Wet-laid microglass fibres. The media shall be pleated between crimped aluminum separators to maintainuniform spacing between pleats. Average filter efficiency shall not be less than 60% as measured by ASHRAE Standard 52-76 testmethod, using atmospheric dust. Section shall include: ( ) 24 x 24 x 4 , ( ) 20 x 24 x 4 and ( ) 12 x 24 x 4 filters.

Intermediate After-Filter, 90%For additional particulate filtration performance, the NRPR/NIAT system shall include a high efficiency Mini-Pleat filter, 4” deep filterlocated downstream of the standard filtration section. The extended surface pleated filters shall consist of water-resistant mediamade from ultra-fine microglass fibres. The media shall be pleated between crimped aluminum separators to maintain uniformspacing between pleats. Neoprene rubber gaskets shall be attached to the filter face. Average filter efficiency shall not be less than90% as measured by ASHRAE Standard 52-76 test method, using atmospheric dust. Section shall include ( ) 24 x 24 x 4, ( ) 20 x24 x 4 and ( ) 24 x 24 x 4 filters.

Thermal Conditioning - Dehumidification with ReheatUnit shall be equipped for dehumidification with dehumidification reheat coils. Coils shall be rated for kW total. Thecapacity of the reheat coil shall be sufficient to maintain room dry bulb conditions when the system is calling for dehumidification.Reheat capacity shall be BTU/h, controlled in a total of stages.

Special Features: The air cooled condenser for hazardous Areas shall be manufactured by PETRA Engineering Industries Co.

 

 

 

 

Engineering Manual

GUIDE SPECIFICATIONS

Thermal Conditioning - Humidification Humidification shall be provided via a self-contained electrode boiler steam humidifier. A humidifier control shall operate automatically by monitoring and controlling water conductivity and fill and drain rate to maximize cylinder life and minimize energy waste. No field adjustment due to water quality shall have to be made.

Humidifier shall have a capacity of lb./h and the body of the humidifier shall be located out of the air stream. Humidifier body and manifold shall be connected by a flexible hose.

Remote Mounted Temperature and Humidity RecorderThe NRPR/NIAT unit shall be supplied with a remote mounted temperature/humidity recorder. Recorder shall have a seven-day recording capability to allow for a periodic monitoring of the control environment.

Water Detector The NRPR/NIAT unit shall be supplied with a water detector, designed to sense water on the surface of a floor. Detector shall be an electric device which contains a waterproof switch providing a dry contact allowing the detector to be connected into existing alarm systems of any voltage.

Remote Set Point Adjustment The NRPR / NIAT unit shall be supplied with a remote set point adjustment. Set point adjustment shall be room mounted and shall have a fixed limit of +3°F to allow for field adjustment of the thermal conditioning package to a predetermined range.

Adjustable Floor Stand The NRPR/NIAT unit shall be furnished with a floor stand of heavy-gauge zinc coated steel in a rugged Penta-Post frame design. It shall isolate the thermal conditioning unit from the raised floor, and shall allow for piping, wiring and checkout of the NRPR/NIAT unit prior to floor installation. The floor stand shall be adjustable to a “ high floor.

Filter Maintenance Package The unit shall include a filter maintenance package comprised of differential pressure gauges monitoring the pressure loss across the individual particulate filters, and the entire filter section.

Refrigeration Maintenance Package Unit shall include a refrigeration maintenance package including visual readings for oil pressure, suction pressure, and discharge pressure.

 

 

 

 

Engineering Manual

INSTALLATION

Preparatory Requirements The NRPR/NIAT supply and return methods are in accordance with the manufacturer’s instructions and approved shop drawings. The system can be shipped as a complete prepackaged unit or in a dual assembly, consisting of the unit main body and the inlet plenum. Field services required to make the NRPR/NIAT unit operational are:

1. 2. 3. 4. 5.

Electrical supply to each system as specified Condensate drain lines Water supply for the humidifier (if included) Water supply for the water cooled condensers (if system is water cooled) Separate electrical supply to Air Cooled Condenser (if system is Air Cooled and included)

Installation of the NRPR/NIAT Unit The NRPR/NIAT unit is a vertical model designed for either up flow or down flow air supply. For rooms which utilize a raised floor system, the down flow model is recommended. In such applications an adjustable floor stand will prove beneficial. Besidesensuring maximum structural support for the NRPR/NIAT unit, it permits installation, pre-piping, wiring and checkout of the air conditioning system prior to installation of the raised floor. In addition, the floor stand provides vibration isolation from adjacent flooring and eliminates the requirement for openings in the floor panels below the NRPR/NIAT unit.

When the NRPR/NIAT is installed outside the computer room (with supply air ducted into the control space) the floor stand is not required. However, a level floor with an adequate loading capability should be provided.

Electrical Requirements of NRPR / NIAT UnitAll NRPR / NIAT models require three-phase electrical service in either 208-230, 460 or 575 volt at 60

Electrical service to the NRPR / NIAT unit should conform to both local and National Electrical

To assure dependable unit operation during periods of peak power, electrical wiring should be sized to allow for minimum voltagedrops. All NRPR / NIAT units come supplied with a manual disconnect switch mounted within the unit for use during emergencies. Air cooled condenser requires a separate feed.

Piping Considerations All refrigeration piping to the NRPR/NIAT unit should be installed with high temperature brazed joints. In addition, isolate all piping from the building by using vibration isolating supports. The employment of sound refrigeration practices for piping supports, traps, leak tests, dehydration and refrigerant charging will help maintain the required performance level of the NRPR/NIAT unit.

As a protection against inadvertent water leaks, provide all floor drains with “wet-traps”. A water detection system is recommendedto be installed below the elevated floor. See optional accessories.

It is recommended that pipes in the underfloor be mounted horizontally, and wherever possible, on the same elevation plane parallelto the air flow. Particular attention must be given to ensure that the pipes do not block the air flow from any part of the room. (Additionally, all condensate and unit drain lines should be trapped and pitched).

Under Floor Air Distribution The NRPR/NIAT’s superior performance characteristics are partly a result of a functionally required constant volume air delivery. Hence, any unusual restrictions within the air circuit can significantly reduce the unit’s efficiency of performance.

 

 

 

 

Engineering Manual

INSTALLATION

Room Location The selection of a suitable room location must be carried out in light of the minimum environmental protection requirements of the electrical and electronic equipment to be installed. The engineer should determine, for the specific job conditions, which potential site locations meet the key criteria for obtaining a corrosion-free equipment operating environment. Other considerations can then be applied without the risk of undermining the room’s priority of function.

In general, the location of the room should be in an area of a building with a good environmental stability potential. Engineers Should avoid locations that are affected by outside temperatures or humidity. It is also advisable to avoid locations which are in direct proximity to major heat or pollutant sources. If a site is chosen with an outside wall, the area of window glass should be minimal; also, the specified window should be double or triple glazed to resist condensation formation on inner surfaces.Another important location factor involves the distance to mechanical, electrical, and refrigeration supply services.

Room Preparation During the design phase, special consideration must be given to potential building and construction problems which, if not given appropriate attention, can add appreciably to the overall cost of the project. As a minimum:

1. Specify construction details which meet the critical functional requirements of the control room pressurization, HVAC,and air filtration systems.

2. Check door openings, etc. to ensure that the required mechanical systems can be easily transported to their respectivelocations.

3. Specify a flooring systems with an adequate loading capability.

4. For a suspended ceiling, ensure that the ceiling clearance is satisfactory and acceptable for proper installation of allnecessary mechanical systems.

5. Allow adequate under floor clearance to permit routine servicing of all control room equipment.

6. Consider all coordination and interfacing factors when establishing your construction sequence plan.

Corrosion Control It is important to see the creation of a functional environmental “envelope” as the key objective in designing a control room appropriate for the industrial environment. Failure to satisfy this essential priority will reduce the corrosion resistance of installed computer ized equipment.

A proper control room design is not limited to the precise handling of moisture, temperature, and air recirculation within the protected space. In addition, contaminant entry must be significantly reduced. The practical application of this important design principle requires that the following elements be incorporated in all control room plans and specifications:

1. Specify an “airtight” room construction to protect the interior space against the corrosive effects of the contaminatedexternal environment.

2. Apply high quality sealing and glazing systems on all potential control room infiltration zones (i.e. doors, windows,concrete blocks, suspended ceilings, etc.).

3. Maintain positive pressure within the control room as a dynamic deterrent to thermal and contaminant infiltration.

4. Scrub both the externals pressurization air and the recirculating HVAC air of acidic gases and particulates.

5. Install a comprehensive environmental monitoring and control system to assure maximum long-term system effectiveness.

 

 

 

 

Engineering Manual

PureAir Filtration Services

PureAirFiltration’s Chemical Medias are a proven filter media which provides continuous purification of corrosive, odorous and toxic contaminants in industrial and commercial environments. PAF media combines the adsorption properties of activated carbon with the oxidation properties of chemically impregnated alumina.

Media analysis through our certified Laboratory ensures maximum efficiency of our products. A complete report establishes a media replacement schedule for each unit. PureAir Filtration’s in-house laboratory can also provide additional performance testsfor specific air contaminants.

 

 

 

 

Alliance customers include:

Deer Ridge Project

SDSU Love Library 1

CSDSU Love Library 1

Mercury Insurance 1

Mercury Insurance 2

LACMA 1

LACMA 2

Ericsson IBM

Cedars Sinai Medical Center PEMEX MINA II PEMEX POZA RICA CRIOGENICAS PEMEX CADEREYTA Microsoft Data

Centers

U.S. Air Force Westwind

Los Angeles County

Museum of Art

                                          

Alliance Air Products 2285 Michael Faraday Drive Suite #15

San Diego, CA 912154 Phone: (619) 428-9688 Fax (619) 428-9689

www.allianceairproducts.com