Carrier 30GTN, 30GTR, 30GBN, 30GBR Product Data

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Page 1

Product Data

30GTN,GTR,GBN,GBR

Air-Cooled Reciprocating

Liquid Chillers

with ComfortLink™ Controls

50 Hz

Nominal Capacities: 50 to 400 Tons

127 to 1445 kW

Features/Benefits

ComfortLink control

Your link to a world of simple and easy to use air-cooled chillers that offer outstanding performance and value. The 30GTN,GTR, GBN,GBR liquid chillers employ more than the latest advanced microprocessor controls, they utilize an expandable platform that grows as your needs change. From stand-alone operation to remotely monitored and operated multichiller plants, ComfortLink controls can keep you plugged in. ComfortLink controls are fully communicating, and are cable ready for connection to a Carrier Comfort Network (CCN). Occupancy scheduling, temperature and pressure read-outs, and the ComfortLink scrolling marquee clear language display compliment the standard features, linking you to a world of carefree comfort. The 30GTN,GTR,GBN,GBR chillers are built on the legendary performance of the Carrier model 30G Flotronic™ chiller and share many of the same time-proven features and technologies providing easy operation, quick installation and start-ups that save you money!

Superior temperature control equals potential for greater productivity

Whether in the classroom, on the production floor, or in the office, ComfortLink controls can help you to adapt to changing weather and business conditions. Accurate temperature control provided by the Carrier ComfortLink system helps to maintain higher levels of indoor air quality, thermal comfort, and productivity space. While many air-cooled chillers use only leaving fluid temperature control, the 30GTN,GTR,GBN,GBR chillers utilize leaving fluid temperature control with a standard entering fluid temperature compensation.

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This Carrier exclusive provides smar

control and intelligent machine capacity staging. Unlike many chillers, Carrier model 30GTN,GTR,GBN,GBR chillers do not require constant fluid flow. The ability to operate with variable flow also allows building owners to realize even greater overall system energy savings in the chilled water pumping system of up to 85%, and not just at the chiller.

Full and part load efficiency advantage

The 30GTN,GTR,GBN,GBR chillers with ComfortLink control offe outstanding efficiencies (EER [Energy Efficiency Ratio], COP [coefficient o performance], and IPLV [integrated part load value]) in both full (up to 10.0 EER) and part load operation (IPLVs up to 14.7). Increased part load efficiency is provided by dual independent refrigeration circuits, suction cutof unloading, and return fluid temperature compensation. The fully integrated ComfortLink control system maintains efficient control over the compressors, unloaders, expansion valves, and condenser fans to optimize performance as conditions change. The Carrier exclusive longstroke electronic expansion valve (EXV) operates at reduced condensing pressures, thereby allowing the control to operate the fans down to lower outdoo temperatures. By utilizing valve position information, the control maintains the highest possible evaporator pressure and minimizes the excessive superheat that conventional thermal expansion valve (TXV) systems require. Wider operating ranges equal increased efficiencies and lower installed costs.

Building design flexibility

Design and consulting engineers will appreciate the broad selection of sizes and wide operating range offered by the 30GTN,GTR,GBN,GBR chillers. With built-in dual chiller control, imaginative large tonnage systems can be easily engineered and controlled with smaller, easier to handle modules. Modula design allows engineers to consider side by side, offset, or angled placement to fit the awkward spaces that the architect sometimes leaves for mechanical systems. Or, in the case of planned expansion, additional cooling can be brought on-line and controlled from the same system. In some places facility managers may find that the cash flow provided by building up large air cooled multi-chiller plants can easily offset any efficiency losses when compared to large wate cooled centrifugal type chilled wate plants.

Quality and reliability

To assure long life and quality performance, every chiller is factory run tested. Individual components are also tested at many levels to assure that only the best parts make it into 30GTN,GTR,GBN,GBR chillers. Long life and reliability are also a function o design. While some manufacturers like to talk about moving parts, Carrier’s engineers recognized the potential dangers to chiller systems caused by problems in the power distribution system. Low voltage and phase imbalances are but a few of the conditions that can hurt the compressor’s motor.

Model 30G chillers were one of the firs to offer ground current sensing to prevent compressor motor burn-out that would contaminate the system and potentially threaten the life of future replacement compressors. The 06E semihermetic compressors are built for performance and have proven themselves in commercial refrigeration equipment worldwide.

With tens of thousands of chillers operating in all corners of the world, end-users count on the reliability o Carrier 30G chillers. The Carrier International Sdn. Bhd. Malaysia plant is an ISO 9001 registered facility as are many of Carrier’s other component and assembly plants throughout the world.

Features

• Simple and easy to use ComfortLink communicating controls.

• Wide operating envelope from –28 to 52 C (–20 to 125 F).

• Accurate temperature control with return fluid compensation.

• Value added features built-in; dual chiller control, reset from return.

• Superior full and part-load efficiency.

• Precise multiple-step capacity.

• Low noise operation (quieter than many screw chillers).

• Dual independent refrigerant circuits.

• Factory run tested.

• Wide range of sizes available from stock.

• History of proven performance and reliability.

Table of contents

Page

Features/Benefits ..............................................................................................1-3

Model Number Nomenclature..............................................................................4

Physical Data..................................................................................................5-10

Base Unit Dimensions .................................................................................. 11-17

Application Data...........................................................................................18-23

Selection Procedure.......................................................................................24,25

Performance Data.........................................................................................25-27

Electrical Data ...............................................................................................28,29

Controls .........................................................................................................30,31

Typical Piping and Wiring ............................................................................32,33

Guide Specifications......................................................................................34,35

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Features/Benefits (cont)

Quality Assurance

MS ISO 9001 REG. NO. AR 0239 MS ISO 14001 CERT. NO. C003001129

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Model number nomenclature

30GT N 100 - - C 9

30GT/GB – Air-Cooled Liquid Chiller

Compressor Start N – Across-The-Line Start with ComfortLink™ Controls R – Part-Wind Start with ComfortLink™ Controls

Unit Sizes*

050 080 110 200 400 060 090 150 300 070 100 175 350

Module Designation (300-400 Unit Sizes Only)* A B

Not Used

V-Ph-Hz 9 – 400-3-50

Condenser Coil Options

- – Copper Tube, Aluminum Fins C – Copper Tube, Copper Fins

*Refer to Unit Sizes and Modular Combinations below.

UNIT SIZES AND MODULAR COMBINATIONS

UNIT

30GTN,GBN

050 50 — — 060 60 — — 070 70 — — 080 80 — — 090 90 — — 100 100 — — 110 110 — — 150 150 — — 175 175 — — 200 200 — — 300 300 150 150 350 350 175 175 400 400 200 200

NOMINAL

TONS

SECTION A

UNIT 30GBN

SECTION B

UNIT 30GBN

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Physical Data – English

LEGEND

Cu-Al – Copper Tubing, Aluminium Fins Condenser Coil Cu-Cu – Copper Tubing, Copper Fins Condenser Coil OD – Outside Diameter

30GTN, GTR UNIT SIZE 050 060 070 080 090 100 110 APPROX OPERATING WEIGHT (lb) Cu-Al 3916 4780 5453 6720 7135 8710 8840 Cu-Cu 4329 5197 6081 7445 7860 9660 9790 REFRIGERANT TYPE R-22 Charge (lb) Ckt A 48 52 71 78 78 98 98 Ckt B 60 54 69 78 78 105 105 COMPRESSORS Reciprocating, Semi-Hermetic Speed (rpm) 1450 06E (Qty) Ckt A (1) 275 (1) 299 (1) 265, (1) 265 (1) 265, (1) 299 (1) 265, (1) 299 (1) 265, (1) 299 (2) 299 (Qty) Ckt B (1) 299 (1) 299 (1) 299 (1) 299 (1) 265, (1) 275 (1) 265, (1) 299 (2) 299 Oil Charge (Compressor/pt) 265/19.0, 275/19.0, 299/19.0 No. Capacity Control Steps 4444888 Capacity (%) Ckt A 43.3 50.0 58.0 62.0 54.0 50.0 50.0 Ckt B 56.7 50.0 42.0 38.0 46.0 50.0 50.0 Minimum Capacity Step (%) 28.8 33.3 19.3 16.0 14.0 13.0 17.0 CONDENSER FANS Propeller, Direct Drive Fan Speed (rpm) 950 No. Blades…Dia.(in.) 6…30 No. Fans…Hp/kW (each) 4…2.5/1.85 6…2.5/1.85 6…2.5/1.85 6..2.5/1.85 6…2.5/1.85 8…2.5/1.85 8..2.5/1.85 Total Airflow (cfm) 34,000 52,000 51,000 57,000 57,000 76,000 76,000 CONDENSER COILS 3/8-in. OD Vertical and Horizontal, Plate Fin, Enhanced Copper Tubing Fins/in. 17 17 17 17 17 17 17 No. Rows (Ckt A or B) 3233333 Face Area, Ckt A and B Total (sq ft) 80.5 116.7 116.7 128.3 128.3 168.0 168.0 Max Working Pressure Refrigerant (psig) 450 COOLER One…Direct Expansion, Shell and Tube No. Refrigerant Circuits 2222222 Net Water Volume, includes nozzles (gal.) 13.5 18.0 18.0 24.5 24.5 30.3 30.3 Max Working Pressure Refrigerant Side (psig) 278 278 278 278 278 278 278 Max Working Pressure Fluid Side (psig) 300 300 300 300 300 300 300 FLUID CONNECTIONS (in.) Flat Face Flange Inlet and Outlet 3444455 Drain (NPT) 3/4

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Physical Data – English (cont)

LEGEND

Cu-Al – Copper Tubing, Aluminium Fins Condenser Coil Cu-Cu – Copper Tubing, Copper Fins Condenser Coil OD – Outside Diameter

30GBN,GBR UNIT SIZE 150 175 200 APPROX OPERATING WEIGHT (lb) Cu-Al 14,100 14,600 15,100 Cu-Cu 15,030 15,530 16,030 REFRIGERANT TYPE R-22 Charge (lb) Ckt A 230 230 230 Ckt B 230 230 230 COMPRESSORS Reciprocating, Semi-Hermetic Speed (rpm) 1450 06E (Qty) Ckt A (1) 275, (2) 299 (1) 275, (2) 299 (1) 275, (3) 299 (Qty) Ckt B (1) 275, (2) 299 (1) 275, (3) 299 (1) 275, (3) 299 Oil Charge (Compressor/pt) 265/19.0, 275/19.0, 299/19.0 No. Capacity Control Steps 678 Capacity (%) Ckt A 50 57 50 Ckt B 50 43 50 Minimum Capacity Step (%) 17 14 13 CONDENSER FANS Propeller, Direct Drive Fan Speed (rpm) 950 No. Blades…Dia.(in.) 6…30 No. Fans…Hp/kW (each) 12…2.5/1.85 Total Airflow (cfm) 120,000 CONDENSER COILS 1/2-in. OD Vertical and Horizontal, Plate Fin, Enhanced Copper Tubing Fins/in. 13.5 13.5 13.5 No. Rows (Ckt A or B) 444 Face Area, Ckt A and B Total (sq ft) 121.0 121.0 121.0 Max Working Pressure Refrigerant (psig) 450 COOLER One…Direct Expansion, Shell and Tube No. Refrigerant Circuits 222 Net Water Volume, includes nozzles (gal.) 60.2 60.2 60.2 Max Working Pressure Refrigerant Side (psig) 235 235 235 Max Working Pressure Fluid Side (psig) 250 250 250 FLUID CONNECTIONS (in.) Flat Face Flange Inlet and Outlet 666 Drain (NPT) 3/4

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Physical Data – English (cont)

LEGEND

Cu-Al – Copper Tubing, Aluminium Fins Condenser Coil Cu-Cu – Copper Tubing, Copper Fins Condenser Coil OD – Outside Diameter

30GBN,GBR UNIT SIZE 300 350 400 SYSTEM MODULES A B Total A B Total A B Total APPROX OPERATING WEIGHT (lb) Cu-Al 14,100 14,100 28,200 14,600 14,600 29,200 15,100 15,100 30,200 Cu-Cu 15,030 15,030 30,060 15,530 15,530 31,060 16,030 16,030 32,060 REFRIGERANT TYPE R-22 Charge (lb) Ckt A 230 230 - 230 230 - 230 230 - Ckt B 230 230 - 230 230 - 230 230 - COMPRESSORS Reciprocating, Semi-Hermetic Speed (rpm) 1450 06E (Qty) Ckt A (1) 275, (2) 299 (1) 275, (2) 299 - (1) 275, (2) 299 (1) 275, (2) 299 - (1) 275, (3) 299 (1) 275, (3) 299 - (Qty) Ckt B (1) 275, (2) 299 (1) 275, (2) 299 - (1) 275, (3) 299 (1) 275, (3) 299 - (1) 275, (3) 299 (1) 275, (3) 299 - Oil Charge (Compressor/pt) 265/19.0, 275/19.0, 299/19.0 No. Capacity Control Steps 66-77-88- Capacity (%) Ckt A 50 50 - 57 57 - 50 50 - Ckt B 50 50 - 43 43 - 50 50 - Minimum Capacity Step (%) 17 17 - 14 14 - 13 13 - CONDENSER FANS Propeller, Direct Drive Fan Speed (rpm) 950 950 - 950 950 - 950 950 - No. Blades…Dia.(in.) 6…30 6…30 - 6…30 6…30 - 6…30 6…30 - No. Fans…Hp/kW (each) 12…2.5/1.85 12…2.5/1.85 24…2.5/1.85 12…2.5/1.85 12…2.5/1.85 24…2.5/1.85 12…2.5/1.85 12…2.5/1.85 24…2.5/1.85 Total Airflow (cfm) 120,000 120,000 240,000 120,000 120,000 240,000 120,000 120,000 240,000 CONDENSER COILS 1/2-in. OD Vertical and Horizontal, Plate Fin, Enhanced Copper Tubing Fins/in. 13.5 13.5 - 13.5 13.5 - 13.5 13.5 - No. Rows (Ckt A or B) 44-44-44- Face Area, Ckt A and B Total (sq ft) 121.0 121.0 242.0 121.0 121.0 242.0 121.0 121.0 242.0 Max Working Pressure Refrigerant (psig) 450 450 450 450 450 450 COOLER One…Direct Expansion, Shell and Tube No. Refrigerant Circuits 224224224 Net Water Volume, includes nozzles (gal.) 60.2 60.2 120.4 60.2 60.2 120.4 60.2 60.2 120.4 Max Working Pressure Refrigerant Side (psig) 235 235 - 235 235 - 235 235 - Max Working Pressure Fluid Side (psig) 150 150 - 150 150 - 150 150 - FLUID CONNECTIONS (in.) Flat Face Flange Inlet and Outlet 66-66-66- Drain (NPT) 3/4 3/4 - 3/4 3/4 - 3/4 3/4 -

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Physical Data – SI

LEGEND

Cu-Al – Copper Tubing, Aluminium Fins Condenser Coil Cu-Cu – Copper Tubing, Copper Fins Condenser Coil OD – Outside Diameter

30GTN,GTR UNIT SIZE 050 060 070 080 090 100 110 APPROX OPERATING WEIGHT (kg) Cu-Al 1776 2168 2473 3055 3243 3960 4018 Cu-Cu 1972 2357 2758 3384 3573 4390 4450 REFRIGERANT TYPE R-22 Charge (kg) Ckt A 21.8 23.6 32.2 35.4 35.4 44.5 44.5 Ckt B 27.2 24.5 31.3 35.4 35.4 44.5 47.7 COMPRESSORS Reciprocating, Semi-Hermetic Speed (r/s) 24.2 06E (Qty) Ckt A (1) 275 (1) 299 (1) 265, (1) 265 (1) 265, (1) 299 (1) 265, (1) 299 (1) 265, (1) 299 (2) 299 (Qty) Ckt B (1) 299 (1) 299 (1) 299 (1) 299 (1) 265, (1) 275 (1) 265, (1) 299 (2) 299 Oil Charge (Compressor/L) 265/9.0, 275/9.0, 299/9.0 No. Capacity Control Steps 4444888 Capacity (%) Ckt A 43.3 50.0 58.0 62.0 54.0 50.0 50.0 Ckt B 56.7 50.0 42.0 38.0 46.0 50.0 50.0 Minimum Capacity Step (%) 28.8 33.3 19.3 16.0 14.0 13.0 17.0 CONDENSER FANS Propeller, Direct Drive Fan Speed (r/s) 15.8 No. Blades…Dia.(mm) 6…762 No. Fans…kW (each) 4…1.85 6…1.85 6…1.85 6…1.85 6…1.85 8…1.85 8..1.85 Total Airflow (L/s) 16,045 25,540 24,068 26,898 26,898 35,864 35,864 CONDENSER COILS 9.53 mm OD Vertical and Horizontal, Plate Fin, Enhanced Copper Tubing Fins/m. 669 669 669 669 669 669 669 No. Rows (Ckt A or B) 3233333 Face Area, Ckt A and B Total (sq m) 7.48 10.84 10.84 11.92 11.92 15.61 15.61 Max Working Pressure Refrigerant (kPa) 3103 COOLER One…Direct Expansion, Shell and Tube No. Refrigerant Circuits 2222222 Net Water Volume, includes nozzles (L) 51.1 68.1 68.1 92.7 92.7 114.7 114.7 Max Working Pressure Refrigerant Side (kPa) 1916 1916 1916 1916 1916 1916 1916 Max Working Pressure Fluid Side (kPa) 2068 2068 2068 2068 2068 2068 2068 FLUID CONNECTIONS (in.) Flat Face Flange Inlet and Outlet 3444455 Drain (NPT) 3/4

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Physical Data – SI (cont)

LEGEND

Cu-Al – Copper Tubing, Aluminium Fins Condenser Coil Cu-Cu – Copper Tubing, Copper Fins Condenser Coil OD – Outside Diameter

30GBN,GBR UNIT SIZE 150 175 200 APPROX OPERATING WEIGHT (kg) Cu-Al 6396 6625 6850 Cu-Cu 6816 7045 7270 REFRIGERANT TYPE R-22 Charge (kg) Ckt A 104.3 104.3 104.3 Ckt B 104.3 104.3 104.3 COMPRESSORS Reciprocating, Semi-Hermetic Speed (r/s) 24.2 06E (Qty) Ckt A (1) 275, (2) 299 (1) 275, (2) 299 (1) 275, (3) 299 (Qty) Ckt B (1) 275, (2) 299 (1) 275, (3) 299 (1) 275, (3) 299 Oil Charge (Compressor/L) 265/9.0, 275/9.0, 299/9.0 No. Capacity Control Steps 678 Capacity (%) Ckt A 50 57 50 Ckt B 50 43 50 Minimum Capacity Step (%) 17 14 13 CONDENSER FANS Propeller, Direct Drive Fan Speed (r/s) 15.8 No. Blades…Dia.(mm) 6…762 No. Fans…kW (each) 12…1.85 Total Airflow (L/s) 56,628 CONDENSER COILS 12.7 mm OD Vertical and Horizontal, Plate Fin, Enhanced Copper Tubing Fins/m 531 531 531 No. Rows (Ckt A or B) 444 Face Area, Ckt A and B Total (sq m) 11.24 11.24 11.24 Max Working Pressure Refrigerant (kPa) 3103 COOLER One…Direct Expansion, Shell and Tube No. Refrigerant Circuits 222 Net Water Volume, includes nozzles (L) 227.9 227.9 227.9 Max Working Pressure Refrigerant Side (kPa) 1620 1620 1620 Max Working Pressure Fluid Side (kPa) 1034 1034 1034 FLUID CONNECTIONS (in.) Flat Face Flange Inlet and Outlet 666 Drain (NPT) 3/4

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Physical Data – SI (cont)

LEGEND

Cu-Al – Copper Tubing, Aluminium Fins Condenser Coil Cu-Cu – Copper Tubing, Copper Fins Condenser Coil OD – Outside Diameter

30GBN,GBR UNIT SIZE 300 350 400 SYSTEM MODULES A B Total A B Total A B Total APPROX OPERATING WEIGHT (kg) Cu-Al 6396 6396 12792 6625 6625 13250 6850 6850 13700 Cu-Cu 6816 6816 13632 7045 7045 14090 7270 7270 14540 REFRIGERANT TYPE R-22 Charge (kg) Ckt A 104.3 104.3 - 104.3 104.3 - 104.3 104.3 - Ckt B 104.3 104.3 - 104.3 104.3 - 104.3 104.3 - COMPRESSORS Reciprocating, Semi-Hermetic Speed (r/s) 24.2 06E (Qty) Ckt A (1) 275, (2) 299 (1) 275, (2) 299 - (1) 275, (3) 299 (1) 275, (2) 299 - (1) 275, (3) 299 (1) 275, (3) 299 - (Qty) Ckt B (1) 275, (2) 299 (1) 275, (2) 299 - (1) 275, (2) 299 (1) 275, (3) 299 - (1) 275, (3) 299 (1) 275, (3) 299 - Oil Charge (Compressor/L) 265/9.0, 275/9.0, 299/9.0 No. Capacity Control Steps 66-77-88- Capacity (%) Ckt A 50 50 - 57 57 - 50 50 - Ckt B 50 50 - 43 43 - 50 50 - Minimum Capacity Step (%) 17 17 - 14 14 - 13 13 - CONDENSER FANS Propeller, Direct Drive Fan Speed (r/s) 15.8 15.8 - 15.8 15.8 - 15.8 15.8 - No. Blades…Dia.(mm) 6…762 6…762 - 6…762 6…762 - 6…762 6…762 - No. Fans…kW (each) 12…1.85 12…1.85 24…1.85 12…1.85 12…1.85 24…1.85 12…1.85 12…1.85 24…1.85 Total Airflow (L/s) 56,628 56,628 113,256 56,628 56,628 113,256 56,628 56,628 113,256 CONDENSER COILS 12.7 mm OD Vertical and Horizontal, Plate Fin, Enhanced Copper Tubing Fins/m 531 531 - 531 531 - 531 531 - No. Rows (Ckt A or B) 44-44-44- Face Area, Ckt A and B Total (sq m) 11.24 11.24 22.48 11.24 11.24 22.48 11.24 11.24 22.48 Max Working Pressure Refrigerant (kPa) 3103 3103 3103 3103 3103 3103 COOLER One…Direct Expansion, Shell and Tube No. Refrigerant Circuits 224224224 Net Water Volume, includes nozzles (L.) 227.9 227.9 455.8 227.9 227.9 455.8 227.9 227.9 455.8 Max Working Pressure Refrigerant Side (kPa) 1620 1620 - 1620 1620 - 1620 1620 - Max Working Pressure Fluid Side (kPa) 1034 1034 - 1034 1034 - 1034 1034 - FLUID CONNECTIONS (in.) Flat Face Flange Inlet and Outlet 66-66-66- Drain (NPT) 3/4 3/4 - 3/4 3/4 - 3/4 3/4 -

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Base unit dimensions — 30GTN,GTR050

NOTES:

1. Unit must have clearances for airflow as follows: TOP – Do not restrict in any way. ENDS – [1524] 5 ft SIDES – [1829] 6 ft

2. Mounting holes may be used to mount unit to concrete pad. They are not recommended for spring isolator location.

3. If spring isolators are used, a perimeter support channel between the unit and isolators is recommended.

4. Dimensions in [ ] are millimeters.

UNIT DIMENSIONS

30GTN,GTR “A” “B” “C” “D”

050

3’-5 7/8”

[1064]

3’-11”

[1194]

5’-5 ½”

[1663]

1’-5 3/16”

[436.6]

050C

3’-6”

[1067]

3’-11 3/16”

[1199]

5’-5 ½”

[1663]

1’-5 3/16”

[436.6]

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Base unit dimensions — 30GTN,GTR060,070

NOTES

UNIT DIMENSIONS

30GTN,GTR “A” “B”

060

3’-6 7/8”

[1090]

4’-10 5/16”

[1481]

060C

3’-7”

[1092]

4’-10 9/16”

[1488]

070

3’-6”

[1067]

4’-10 ½”

[1486]

070C

3’-6 3/16”

[1072]

4’-10 7/8”

[1496]

1. Unit must have clearances for airflow as follows: TOP – Do not restrict in any way. ENDS – [1524] 5 ft SIDES – [1829] 6 ft

2. Mounting holes may be used to mount unit to concrete pad. They are not recommended for spring isolator location.

3. If spring isolators are used, a perimeter support channel between the unit and isolators is recommended.

4. Dimensions in [ ] are millimeters.

Page 13

Base unit dimensions — 30GTN,GTR080,090

UNIT DIMENSIONS

30GTN,GTR “A” “B”

080

5’-9 5/8”

[1769]

3’-6”

[1067]

090

5’-7 5/16”

[1710]

3’-2 3/4”

[984]

NOTES:

1. Unit must have clearances for airflow as follows: TOP – Do not restrict in any way. ENDS – [1524] 5 ft SIDES – [1829] 6 ft

2. Mounting holes may be used to mount unit to concrete pad.

They are not

recommended for spring isolator location.

3. If spring isolators are used, a perimeter support channel

between the unit

and isolators is recommended.

4. Dimensions in [ ] are millimeters.

Page 14

Base unit dimensions — 30GTN,GTR100,110

NOTES:

1. Unit must have clearances for airflow as follows: TOP – Do not restrict in any way. ENDS – [1524] 5 ft SIDES – [1829] 6 ft

2. Mounting holes may be used to mount unit to concrete pad. They are not recommended for spring isolator location.

3. If spring isolators are used, a perimeter support channel between the unit and isolators is recommended.

4. Dimensions in [ ] are millimeters.

Page 15

Base unit dimensions — 30GBN,GBR150-200, 300A/B-400A/B

Page 16

Base unit dimensions — mounting weights (approximate)

LEGEND

C-AL – Copper Tubing, Aluminium Fins C-C – Copper Tubing, Copper Fins

NOTE: If spring isolators are used, a perimeter support channel between the unit and the isolators is recommended.

RIGGING CENTER OF GRAVITY

050 060 070 080 090 100,110

UNIT SIZE

30GTN,GTR

in. mm in. mm in. mm in. mm in. mm in. mm

Dimension

47.0 1194 58.3 1481 58.5 1486 69.6 1769 67.3 1710 87.8 2229

Dimension

41.9 1064 42.9 1090 42.0 1067 42.0 1067 38.8 984 40.0 1016

lb kg

UNIT SIZE

30GTN,GTR

CONDENSER

COIL

ABCDABCD

C-AL 1074 968 889 986 487 439 403 447

050

C-C 1182 1076 997 1095 536 488 452 496

C-AL 1269 1151 123 1238 575 522 509 561

060

C-C 1373 1255 1227 1342 623 569 556 609

C-AL 1508 1369 1226 1350 684 621 556 612

070

C-C 1664 1526 1383 1508 755 692 627 684

C-AL 1650 1730 1680 1660 750 786 764 755

080

C-C 1830 1910 1863 1842 832 868 847 837

C-AL 1833 1864 1724 1714 833 847 784 779

090

C-C 2014 2040 1907 1899 915 927 867 863

C-AL 2222 2222 2133 2133 1010 1010 970 970

100

C-C 2460 2460 2370 2370 1118 1118 1077 1077

C-AL 2271 2271 2149 2149 1032 1032 976 976

110

C-C 2508 2508 2387 2387 1140 1140 1085 1085

Page 17

Base unit dimensions — mounting weights (approximate) (cont)

UNIT SIZE

30GBN,GBR

CONDENSER

COIL

ABCDEFGH

C-AL 1261 2230 2230 1261 1353 2200 2200 1353

150, 300A/B

C-C 1377 2338 2338 1377 1467 2314 2314 1467

C-AL 1261 2230 2250 1350 1675 2275 2200 1353

175, 350A/B

C-C 1377 2338 2360 1467 1788 2380 2314 1467

C-AL 1350 2250 2250 1350 1675 2275 2275 1675

200, 400A/B

C-C 1467 2360 2360 1467 1788 2380 2380 1788

UNIT SIZE

30GBN,GBR

CONDENSER

COIL

ABCDEFGH

C-AL 573 1014 1014 573 615 1000 1000 615

150, 300A/B

C-C 626 1063 1063 626 667 1052 1053 667

C-AL 573 1014 1023 614 761 1034 1000 615

175, 350A/B

C-C 626 1063 1073 667 813 1082 1053 667

C-AL 614 1023 1023 614 761 1034 1034 761

200, 400A/B

C-C 667 1073 1073 667 813 1082 1083 813

LEGEND

C-AL – Copper Tubing, Aluminium Fins C-C – Copper Tubing, Copper Fins

NOTE: If spring isolators are used, a perimeter support channel between the unit and the isolators is recommended.

Page 18

Application data

MINIMUM COOLER FLUID FLOW RATES AND MINIMUM LOOP VOLUME

Leveling unit

Unit must be level within 1/8-in. per ft when installed to ensure proper oil return to the compressors.

While most outdoor locations are suitable for 30GTN,GTR, GBN,GBR units, the roof is a common site that presents a problem if roof has been pitched to aid in water removal. To assure proper oil return, be sure that unit is level, particularly in its major lengthwise dimension, as compressor oil return piping runs in that direction.

t should be determined prior to installation if any specia

treatment is required to assure a level installation.

Cooler fluid temperature

1. Maximum leaving chilled fluid temperature (LCWT) for unit is 70 F (21 C). Unit can start and pull down with up to 95 F (35 C) entering-fluid temperature due to MOP (maximum operating pressure) feature of the TXV. For sustained operation, it is recommended that entering-fluid temperature not exceed 85 F (29.4 C).

2. Minimum LCWT for standard unit is 40 F (3.3 C). It is permissible to use a standard microprocessor-controlled ComfortLink™ chiller with leaving-fluid temperatures in the range of 34 to 39.9 F (1° to 3.28 C) only if a protective brine solution (20% antifreeze solution, or greater) is used. (See Controls and Troubleshooting literature for further information.)

Medium temperature brine application

Application of chiller for brine duty within the 39.9 to 15 F (3.3 to –9.4 C) range is possible by ordering the proper factory-installed brine option. For ratings below 38° F (3.3 C) LCWT, contact your local Carrier representative.

Leaving-fluid temperature reset

Reset reduces compressor power usage at part load when design LCWT is not necessary. Humidity control should be considered since higher coil temperatures resulting from reset will reduce latent heat capacity. Three reset options are offered, based on the following: Return-fluid temperature — Increases LCWT temperature set point as return (or entering) fluid temperature decreases (indicating load decrease). Option may be used in any application where return fluid provides accurate load indication. Limitation of return fluid reset is that LCWT may only be reset to value of design return fluid temperature . Outdoor-air temperature — Increases LCWT as outdoo

ambient temperature decreases (indicating load decrease). This reset should be applied only where outdoor ambient temperature is an accurate indication of load. An accessory thermistor is required. Space temperature — Increases LCWT as space temperature decreases (indicating load decrease). This reset should be applied only where space temperature is an accurate indication of load. An accessory thermistor is required.

For details on applying a reset option, refer to uni

Controls and Troubleshooting literature. Obtain ordering part numbers for reset option from current price pages or contact your local Carrier representative.

Cooler flow range

Ratings and performance data in this publication are for a cooling temperature rise of 10° F (6° C), and are suitable for a range from 5 to 20 F (2.8 to 11.1 C) temperature rise without adjustment. The ComfortLin

chillers may be operated using a different temperature range, provided flow limits are not exceeded. Fo

minimum flow rates, see Minimum Cooler Fluid Flow Rates and Minimum Loop Volume table. High flow rate is limited by pressure drop that can be tolerated. I

another temperature range is used, apply LCWT correction as given in Selection Procedure example on page 53.

APPLICATION V N

Normal Air Conditioning 33.25 Process Type Cooling 6 to 10 6.5 to 10.8 Low Ambient Unit Operation 6 to 10 6.5 to 10.8

NOTES:

1. Minimum flow based on 1.0 fps (0.30 m/s) velocity in cooler without special cooler baffling.

2. Minimum Loop Volumes: Gallons = V x ARI Cap. in tons Liters = N x ARI Cap. in kW

MINIMUM COOLER

FLOW RATE

MINIMUM LOOP

VOLUME

UNIT SIZE

30GTN,GTR,GBN,GBR

Gpm L/s Gal L

050 37.7 2.38 153 580 060 47.5 3.00 181 684 070 47.5 3.00 210 796 080 66.7 4.20 243 920 090 59.5 3.75 272 1029 100 84.1 5.30 301 1138

110 81.1 5.30 333 1260 150, 300A/B 192.0 6.90 502 1900 175, 350A/B 192.0 6.90 568 2150 200, 400A/B 192.0 6.90 635 2403

Page 19

Minimum cooler flow (maximum cooler temperature rise) — The minimum cooler flow for standard units is

shown in Minimum Cooler Fluid Flow Rates and Minimum Loop Volume tables. When gpm (L/s) required is lower (o

rise higher), follow recommendations bel ow: a. Multiple smaller chillers may be applied in series, each providing a portion of the design temperature rise. b. Cooler fluid may be recirculated to raise flow rate. However, mixed temperature entering cooler must be maintained a minimum of at least 5° F (2.8° C) above the LCWT. c. Special cooler baffling is required to allow minimum flow rate to be reduced.

OTE: Recirculation flow is shown below.

Maximum cooler flow — The maximu m cooler flow (> 5 gpm/ton or < 5° F rise [> 0.09 L/s .kW or < 2.7° C rise]) results in practical maximum pressure drop through cooler.

1. Return fluid may bypass the cooler to keep pressure drop through cooler within acceptable limits. This permits a higher .T with lower fluid flow through cooler and mixing after the cooler.

2. Special cooler baffling to permit a cooler flow rate increase of 10% is available by special order.

OTE: Bypass flow is shown below.

Variable cooler flow rates — Variable rates may be applied to standard chiller. Unit will, however, attempt to maintain a constant leaving chilled fluid temperature. In such cases, minimum flow must be in excess of minimum flow given in Minimum Cooler Fluid Flow Rates and Minimum Loop Volume table, and flow rate must change in steps of less than 10% per minute. Apply 6 gal.

er ton (6.5 L per kW) wate

loop volume minimum if flow rate changes more rapidly.

Fluid loop volume — The volume in circulation must equal o

exceed 3 gal. per nominal ton (3.25 L per kW) of cooling for temperature stability and accuracy in normal air-conditioning applications. (For example, a 30GBN200 would require 635 gal. [2403 L].) In process cooling applications, or for operation at ambient temperature below 32 F (0° C) with low loading conditions, there should be from 6 to 10 gal. per ton (6.5 to

10.8 L per kW). To achieve this volume, it is often necessary to install a tank in the loop. Tank should be baffled to ensure there is no stratification and that water (or brine) entering tank is adequately mixed with liquid in the tank. NOTE: Tank installation is shown below.

Cooler fouling factor — The fouling factor used to calculate tabulated ratings was .00010 ft

2 • hr • °F/Btu (.000018 m2 •

°C/W). As fouling factor is increased, unit capacity decreases and compressor power increases. Standard ratings should be corrected using following multipliers:

FOULING FACTOR

English

(ft

2 .hr.°F/Btu)

(m2 .°C/W)

CAPACITY

MULTIPLIER

COMPRESSOR

POWER

MULTIPLIER

.00025 .000044 0.991 0.995 .00050 .000088 0.977 0.987 .00075 .000132 0.955 0.979 .00175 .000308 0.910 0.952

Cooler protection — Protection against low ambient freeze-up is required for unit operation in areas that experience temperatures below 32 F (0° C). Protection should be in the form of inhibited ethylene glycol or other suitable brine. Even though unit cooler is equipped with insulation and an electric heater that helps prevent freeze-up, it does not protect fluid piping external to unit or if there is a power failure. Use only antifreeze solutions approved for heat exchanger duty. Use of automotive-type antifreezes is not recommended because of the fouling that can occur once their relatively shortlived inhibitor breaks down. Draining cooler and outdoor piping is recommended if system is not to be used during freezing weather conditions. See Low Ambient Temperature Operation section page 46.

Page 20

Application data (cont)

Condenser

Altitude correction factors — Correction factors must be

applied to standard ratings at altitudes above 2000 ft (610 m) using the following multipliers:

ALTITUDE CAPACITY

ft m

CAPACITY

MULTIPLIER

COMPRESSOR

POWER MULTIPLIER

0 0 1.00 1.00 2000 610 0.99 1.01 4000 1220 0.98 1.02 6000 1830 0.97 1.03 8000 2440 0.96 1.04

10000 3050 0.95 1.05

Condenser airflow — Airflow restrictions on units with standard fans will affect the unit capacity, condenser head pressure, and compressor power input. Correction factors to be applied for external static restrictions up to 0.2 in. wg (50 Pa) are as follows:

EXTERNAL STATIC

in. wg Pa

CAPACITY

MULTIPLIER

COMPRESSOR

POWER MULTIPLIER

0.0 0.0 1.000 1.00

0.1 25 0.986 1.01

0.2 50 0.968 1.03

High ambient temperature

High outdoor ambient chiller start-up and operation (fully loaded) is possible for standard 30GTN,GBN chillers at ambient temperatures up to 125 F (52 C) at nominal voltage. In some cases, where return water temperature is expected to exceed 60 F (15.5 C), an accessory kit may be required.

Low ambient temperature operation

With certain field provisions as described below, units will start and operate down to 0° F (–18 C). NOTE: Minimum load on chiller must be above minimum step of unloading. Antifreeze solution — Inhibited ethylene glycol or other suitable corrosion-resistant anti-freeze solution must be field supplied and installed in all units for unit operation below 32 F (0° C). Solution must be added to fluid loop to protect loop down to 15° F (8° C) below minimum operating ambient temperature. Concentration should be based on expected minimum temperature and either “Burst” or “Freeze” protection levels.

Provide sufficient volume in the chilled fluid loop — At least 6 gal per ton (6.5 L per kW) of refrigeration is the recommended minimum for a moderate system load.

Freeze versus burst protection — If chiller operation is not required during winter/off season, lower glycol concentrations based on “burst” protection criteria may be considered. Often use of burst protection results in lower fluid costs and has less impact on chiller cooler capacity and flow rate. Consult glycol fluid manufacturers for burst protection recommendations and fluid specifications.

Capacity correction (antifreeze)

nhibited ethylene glycol (or other suitable brine) should be used in installations where subfreezing temperatures are expected. Unit performance data must be corrected for the

addition of inhibited ethylene glycol as shown in following example. Correction factors can be derived from curves in the Inhibited Ethylene Glycol Performance chart at right. Additional performance information on this and other fluids is available in Carrier’s Electronic Catalog (E-CAT) software program. “Slush” and “Burst” concentration may also be considered for winter shutdown protection and unit operation is not required. Example: English — Where a 5 F outdoor temperature is anticipated, determine concentration of inhibited ethylene glycol to protect system to –10 F ambient temperature at zero flow. Enter the solution crystallization point curve (at right) at –10 F; read that 40% concentration of inhibited ethylene glycol is required to prevent crystals from forming in solution. Consider the 30GTN110 unit from the Selection Procedure example on page 53 (refer to correction curves at 40% solution).

Correct unit capacity — On the capacity correction curve in chart on page 47, read 0.95.

Corrected capacity = 0.95 x determined capacity

= 0.95 x 112.6 = 107.0 tons

Correct cooler water flow — On the cooler flow correction curve on page 47, read 1.15. Chilled water flow (at corrected capacity) = 24 x corrected cap. in tons = U.S. gpm temperature rise F

= 24 x 107.0 = 183.4 U.S. gpm 14°

Chilled water flow (40% solution) = 1.15 x 183.4

= 210.9 U.S. gpm Correct cooler pressure drop — On cooler pressure drop correction curve on page 47, read 1.33. On cooler pressure drop curve on page 49, for 210.9 gpm, read pressure drop = 8.1 ft water gage. The pressure drop for 40% solution = 1.33 x 8.1 = 10.8 ft water.

Correct compressor power input (kW) — On power correction curve below, read 0.97 correction factor at 40% ethylene glycol concentration. Power input from Selection Procedure example = 126.1 kW. Corrected power input = 0.97 x 126.1 = 122.3 kW

Page 21

Example: SI — Determine concentration of inhibited ethylene glycol to protect the system to –23 C ambient temperature at zero flow.

Enter the solution crystallization point curve abov e, at –23 C, read 40% concentration inhibited ethylene glycol is required to prevent crystals from forming in solution.

Consider 30GTN110 unit selected from the Selection Procedure example (refer to correction curves at 40% solution).

Correct unit capacity — On glycol performance capacity correction curve above, read 0.95. Corrected capacity = 0.95 x determined capacity

= 0.95 x 379.7

= 360.7 kW Correct chilled water flow — On cooler flow

correction curve above, read 1.15. Chilled water flow (at corrected capacity) = 0.239 x corr. cap. in kW = L/s temperature rise C

= 0.239 x 360.7 = 11.1 L/s

7.8°

Chilled water flow (40% solution) = 1.15 x 11.1 = 12.8 L/s

Correct cooler pressure drop — On cooler pressure drop correction curve on this page, read 1.33. On cooler pressure drop curve on page 49, for 12.8 L/s, read pressure drop of 24 kPa. The pressure drop for 40% solution = 1.33 x 24 = 31.92 kPa.

Correct compressor power input (kW) — On the power correction curve on this page, read 0.97 correction factor at 40% ethylene glycol concentration. Power input from Selection Procedure example = 123.2 kW. Corrected power input = 0.97 x 123.2 = 119.5 kW.

Oversizing chillers

Oversizing chillers by more than 15% at design conditions must be avoided as the system operating efficiency is adversely affected (resulting in greater or excessive electrical demand). When future expansion of equipment is anticipated, install a single chiller to meet present load requirements and add a second chiller to meet the additional load demand. It is also recommended that 2 smaller chillers be installed where operation at minimum load is critical. The operation of a smaller chiller loaded to a greater percentage ove

minimum is preferred to operating a single chiller at or nea

its minimum recommended value. Hot gas bypass should not be used as a means to allow oversizing chillers. Hot gas bypass should be given consideration where substantial operating time is anticipated below the minimum unloading step.

Multiple chillers

Where chiller capacities greater than 200 tons (703 kW) are required, or where stand-by capability is desired, chillers may be installed in parallel. Units should be of equal size to ensure balanced fluid flows. Where a large temperature drop (> 25° F [13.9° C]) is desired, chillers may be installed in series. Fluid temperature sensors need not be moved for multiple chiller operation. A 10 ft (3 m) separation is required between units for airflow, and a 6 ft (1.8 m) distance is required from units to obstructions. See Multiple Unit Separation figure below. See Base Unit Dimensions section on pages 27-39 for service clearances.

Unit software is capable of controlling two units as a single plant. Refer to Controls, Start-Up, Operation, Service, and Troubleshooting guide for further det ai l s .

Page 22

Application data (cont)

Condenser coil protection

Electrical/utility interests

Energy management — Use of energy management practices

can significantly reduce operating costs, especially during offpeak modes of operation. Demand limiting and temperature reset are 2 techniques for accomplishing efficient energy management. See Demand Limiting (also called load shedding) section below and Leaving-Fluid Temperature Reset section on page 44 for further details.

Demand limiting (also called load shedding) — When

utility’s demand for electricity exceeds a certain level, loads are shed to keep electricity demand below a prescribed maximum level. Typically, this happens on hot days when air conditioning is most needed. Demand may be limited on unit by resetting fluid temperature, or by unloading the chiller to a given predetermined percentage of the load. Demand limit may also be driven by an external 4 to 20 mA signal. These features require a signal from an intelligent central control. Do not cycle demand limiter for less than 10 minutes on and 5 minutes off. Duty cycling cycles electrical loads at regular intervals regardless of need. This reduces the electrical operating costs of building by “fooling” demand indicating devices. Duty cycling of compressors or fans is not recommended since motor winding and bearing life suffer from constant cycling.

Remote on-off control

Remote on-off control may be applied by hard-wired connection (see Controls and Troubleshooting literature) or by connection to a Carrier Comfort Network (CCN).

Part-wind start

This is not generally required on 30GTN,GBN chillers due to use of multiple compressors allowing smaller electrical load increments, but is available if required. Maximum instantaneous current flow (see ICF in Electrical Data table on pages 78-81) should be used in determining need.

Strainers

It is recommended that a strainer with a minimum of 20 mesh be installed in the cooler fluid inlet line, just ahead of and as close as possible to the cooler.

Copper-fin coils provide increased corrosion resistance in

moderate coastal environments where industrial air pollution is not present. All copper coils eliminate bi-metallic construction to eliminate the potential for galvanic corrosion. Application in industrial environments is not recommended due to potential attack from sulfur, sulfur oxide, nitrogen oxides, carbon and several other industrial airborne contaminants. In moderate seacoast environments, copper-fin coils have extended life compared to standard or pre-coated aluminum-fin coils.

Page 23

Page 24

Selection procedure — English (with 30GTN example)

Selection procedure — SI (with 30GTN example)

OTE: The Carrier electronic catalog provides quick, easy computer selection of Carrier chillers. The catalog is available from your local Carrier representative.

I Determine unit size and operating conditions required to provide specified capacity at given conditions:

Capacity required . . . . . . . . . . . . . . . . . . …112 tons

Leaving chilled water temperature (LCWT) . . . 45 F

Chilled water temperature rise . . . . . . . . . . . 14° F

Condenser entering-air temperature (CEAT) . . 95 F

Loop volume . . . . . . . . . . . . . . . . . . . . . . 350 gal.

Ratings are based on 10° F rise and are suitable for a temperature rise range from 5° to 15° F without adjustment. In this case, however, greater accuracy is desired.

II Correct LCWT for 14° F cooler water temperature rise.

Enter LCWT correction curve (below) at 14° F and read a correction of 0.3 F. Corrected LCWT is, therefore, 45 + 0.3 = 45.3 F.

III Determine capacity, unit size, and power input.

Enter Cooling Capacities table at given CEAT and LCWT — 95 F and 45 F, respectively. Read down capacity column until the capacity nearest to but higher than specified required capacity is reached. In this case, 113 tons is delivered by a 30GTN110.

Interpolate between 45 F and 46 F to find determined capacity and power input at corrected LCWT (45.3 F). Values are:

Capacity . . . . . . . . . . . . . . . . . . . . . . . 113.6 tons

Power input . . . . . . . . . . . . . . . . . . . . . 136 kW

IV Calculate corrected cooler water flow.

Water flow = 24 x corr cap. in tons = U.S. gpm temperature rise °F

=24 x 113.6 = 194.8 U.S. gpm 14

V Calculate the cooler pressure drop.

Enter cooler pressure drop curve (page 32) at the corrected flow rate (194.8 U.S. gpm) and read, for the 30GTN110, a pressure drop of 10.4 ft of water.

VI Check loop volume and cooler water flow rate.

Minimum loop volume, from application data, is 333 gal. for 30GTN110. Therefore, given volume of 350 gal. is satisfactory. Minimum water flow rate, from application data, is 73 gpm for 30GTN110. Flow rate of 194.8 gpm is well above minimum required.

I Determine unit size and operating conditions required to provide specified capacity at given conditions:

Capacity required . . . . . . . . . . . . . . . . . . . 380 kW

Leaving chilled water temperature (LCWT) . . . . 6 C

Chilled water temperature rise . . . . . . . . . . . 7.8° C

Condenser entering air temperature (CEAT) . . 35 C

Loop volume . . . . . . . . . . . . . . . . . . . . . . 1400 L

Ratings are based on 6 C rise and are suitable for a temperature rise range from 2.8° to 8.3° C without adjustment. In this case, however, greater accuracy is desired.

II Correct LCWT for 7.8° C cooler water temperature rise.

Enter LCWT correction curve (below) at 7.8° C and read a correction of 0.14 C. Corrected LCWT is, therefore, 6 + 0.14 = 6.1 C.

III Determine capacity, unit size, and power input.

Enter Cooling Capacities table at given CEAT and LCWT — 35 C and 6 C, respectively. Read down the capacity column until the capacity nearest to but higher than the specified required capacity is

reached. In this case, 381.7 kW is delivered by a 30GTN110. Interpolate between 6 C and 7 C to find the determined capacity and power input at corrected LCWT (6.1 C). Values are:

Capacity . . . . . . . . . . . . . . . . . . . . . . . . 383 kW

Power input . . . . . . . . . . . . . . . . . . . . . 132.6 kW

IV Calculate corrected cooler water flow.

Water flow = 0.239 x corr cap. in kW = L/s temperature rise °C

= 0.239 x 383 = 11.7 L/s

7.8

V Calculate cooler pressure drop.

Enter cooler pressure drop curve (page 32) at corrected flow rate (11.7 L/s) and read, for 30GTN110, a pressure drop of 26.0 kPa.

VI Check loop volume and cooler water flow rate.

Minimum loop volume, from application data, is 1260 L for 30GTN110. Therefore, given volume of 1400 L is satisfactory. Minimum water flow rate, from application data, is 4.6 L/s for 30GTN110. Flow rate of 11.7 L/s is well above minimum required.

Page 25

Selection procedure – English and SI

Performance data

PART LOAD DATA, 50 Hz UNITS

PERCENT DISPLACEMENT — SEQUENCE A

30GTN,GTR,GBN,GBRCAPACITY

STEPS

050 060 070 080 090 100 110 150,300A/B 175,350A/B 200,400A/B

28 33 19 17 14 13 17 17 14 13

42 50 27 25 21 20 25 33 29 25

87 83 65 42 29 26 33 50 43 38

100 100 73 54 36 33 42 67 57 50

- - 92 62 43 40 50 83 71 63

- - 100 79 61 57 58 100 86 75

- - - 92 68 63 67 - 100 88

- - - 100 75 70 75 - - 100

- - - - 86 87 83 - - -

- - - - 93 93 92 - - -

- - - - 100 100 100 - - -

PART LOAD DATA, 50 Hz UNITS

PERCENT DISPLACEMENT — SEQUENCE B

30GTN,GTR,GBN,GBRCAPACITY

STEPS

050 060 070 080 090 100 110 150,300A/B 175,350A/B 200,400A/B

- - - 25141317 17 14 13

- - - 38212025 33 29 25

- - - 42292633 50 43 38

- - - 50363342 67 57 50

- - - 62434050 83 71 63

- - - 79 53 57 58 100 86 75

- - - 88 60 63 67 - 100 88

- - - 100 67 70 75 - - 100

- - - - 86 87 83 - - -

- - - - 93 93 92 - - -

- - - - 100 100 100 - - -

Page 26

Performance data (cont)

COOLING CAPACITIES - ENGLISH

CONDENSER ENTERING AIR TEMPERATURE (F)

85 95 105 115 125

UNIT SIZE

30GTN,GTR

GBN,GBR

LCWT

(F)

Cap.

Input

Cooler

Flow Rate

Cap.

Input

Cooler

Flow Rate

Cap.

Input

Cooler

Flow Rate

Cap.

Input

Cooler

Flow Rate

Cap.

Input

Cooler

Flow Rate

050 50.3 54.1 120.4 47.6 57.1 113.9 44.9 59.8 107.4 42.1 62.3 100.8 39.3 64.5 94.1 060 59.2 62.7 141.7 56.0 66.2 134.2 52.9 69.4 126.7 49.8 72.4 119.2 46.7 75.1 111.7 070 69.1 70.6 165.4 65.2 74.9 156.2 61.4 78.8 147.0 57.6 82.5 137.8 53.8 85.9 128.7 080 79.7 75.4 190.8 75.2 79.6 180.1 70.9 83.4 169.6 66.5 87.0 159.2 62.1 90.3 148.7 090 89.3 95.9 213.8 84.2 101.2 201.6 79.1 106.1 189.3 74.0 110.6 177.1 68.9 114.6 164.8 100 98.3 102.4 235.3 92.8 108.1 222.2 87.3 113.3 208.9 81.8 118.2 195.8 76.3 122.7 182.8

110 108.6 122.1 260.0 102.9 128.1 246.4 97.2 133.7 232.8 91.5 138.8 219.1 85.7 143.6 205.2 150,300A/B 164.4 175.8 392.9 155.0 184.6 370.5 145.7 192.3 348.3 136.2 199.3 325.7 126.9 205.6 303.3 175,350A/B 185.7 211.0 443.9 175.3 220.8 419.1 165.0 229.9 394.5 154.5 237.8 369.3 143.9 244.9 344.1 200,400A/B

203.7 244.6 486.9 192.4 255.6 460.0 181.3 265.6 433.4 170.1 274.7 406.6 158.8 282.8 379.7

050 52.1 55.1 124.8 49.3 58.2 118.2 46.5 61.0 111.5 43.7 63.6 104.7 40.9 66.0 97.9

060 61.3 63.9 146.9 58.1 67.5 139.2 54.9 70.9 131.5 51.7 74.0 123.8 48.5 76.8 116.1

070 71.6 71.9 171.4 67.7 76.4 162.1 63.7 80.5 152.7 5.8 84.3 143.3 55.9 87.8 133.9

080 82.6 76.9 197.9 78.1 81.3 187.1 73.6 85.3 176.2 69.1 89.0 165.5 64.6 92.4 154.7

090 92.6 97.9 221.9 87.3 103.4 209.2 82.1 108.5 196.7 76.9 113.1 184.1 71.6 117.4 171.5

100 102.1 104.5 244.6 96.5 110.4 231.1 90.8 115.9 217.4 85.2 121.0 204.0 79.5 125.7 190.6

110 112.8 124.8 270.2 106.9 131.0 256.0 101.0 136.9 242.1 95.1 142.2 227.9 89.2 147.2 213.8 150,300A/B 170.7 179.8 408.4 161.1 188.8 385.4 151.6 196.9 362.6 141.9 204.4 339.3 132.2 210.9 316.4 175,350A/B 192.8 215.8 461.3 182.3 226.1 436.0 171.6 235.4 410.4 160.8 243.9 384.8 150.1 251.4 359.1 200,400A/B

211.4 250.2 505.8 199.9 261.7 478.3 188.5 272.1 451.0 177.0 281.7 423.5 165.5 290.2 395.8

050 53.9 56.1 129.1 51.1 59.4 122.5 48.2 62.3 115.7 45.4 65.0 108.7 42.4 67.5 101.8

060 63.5 65.1 152.2 60.2 68.9 144.3 56.9 72.3 136.5 53.6 75.5 128.5 50.3 78.5 120.6

070 74.1 73.3 177.6 70.1 77.8 168.1 66.1 82.1 158.4 62.1 86.1 148.8 58.1 89.7 139.2

080 85.5 78.4 205.1 81.0 82.9 194.2 76.4 87.1 183.1 71.7 91.0 171.9 67.1 94.6 160.9

090 95.9 99.9 230.0 90.6 105.6 217.1 85.2 110.9 204.2 79.8 115.7 191.3 74.4 12.2 178.4

100 106.0 106.7 254.2 100.2 112.8 240.2 94.4 118.5 226.2 88.6 123.9 212.4 82.8 128.8 198.6

110 117.0 127.5 280.4 111.0 134.0 266.0 104.9 140.1 251.4 98.9 145.7 237.0 92.8 150.9 222.5 150,300A/B 177.3 183.8 424.5 167.4 193.1 400.7 157.6 201.6 377.2 147.6 209.4 353.3 137.6 216.3 329.5 175,350A/B 200.1 220.6 479.1 189.3 231.4 453.2 178.4 241.1 427.0 167.3 249.9 400.5 156.3 257.9 374.2 200,400A/B

219.4 255.9 525.2 207.7 267.9 497.2 195.9 278.7 468.9 184.2 288.8 441.0 172.2 297.7 412.3

050 54.8 56.7 131.5 52.0 59.9 124.7 49.1 63.0 117.8 46.2 65.7 110.8 43.2 68.2 103.7

060 64.6 65.7 154.9 61.3 69.5 146.9 57.9 73.1 138.9 54.6 76.3 130.9 51.2 79.4 122.9

070 75.4 73.9 180.8 71.3 78.6 171.1 67.3 82.9 161.4 63.2 87.0 151.6 59.2 90.7 141.9

080 87.1 79.2 208.9 82.4 83.8 197.6 77.8 88.1 186.5 73.1 92.0 175.3 68.4 95.7 164.0

090 97.6 100.9 234.1 92.2 106.7 221.1 86.8 112.1 208.1 81.3 117.1 194.9 75.8 121.6 181.8

100 108.0 107.8 259.0 102.1 114.0 244.8 96.2 119.9 230.7 90.3 125.3 216.6 84.5 130.3 202.6

110 119.0 128.9 285.5 113.0 135.5 271.0 106.9 141.7 256.4 100.8 147.4 241.7 94.6 152.8 226.9 150,300A/B 180.6 185.8 432.6 170.6 195.3 408.5 160.6 204.0 384.6 150.5 212.0 360.4 140.4 219.1 336.3 175,350A/B 204.0 223.2 488.5 192.9 234.0 461.9 181.8 244.0 435.4 170.7 253.1 408.9 159.5 261.2 381.9 200,400A/B

223.4 258.8 534.9 211.6 271.1 506.7 199.6 282.0 478.0 187.8 292.4 449.7 175.7 301.5 420.7

050 55.8 57.2 133.8 52.9 60.5 126.9 50.0 63.6 119.9 47.0 66.4 112.8 44.1 69.0 105.7

060 65.7 66.4 157.6 62.3 70.2 149.5 59.0 73.8 141.5 55.6 77.2 133.4 52.2 80.3 125.2

070 76.7 74.6 183.9 72.6 79.3 174.1 68.5 83.7 164.4 64.4 87.9 154.5 60.3 91.7 144.6

080 88.7 80.0 212.7 83.9 84.6 201.2 79.2 89.0 190.0 74.5 93.0 178.7 69.7 96.8 167.1

090 99.3 101.9 238.2 93.8 107.8 225.1 88.4 113.3 211.9 82.8 118.4 198.6 77.3 123.0 185.4

100 110.0 108.9 263.8 104.1 115.3 249.6 98.1 121.2 235.3 92.2 126.8 221.1 86.2 131.9 206.7

110 121.2 130.3 290.7 115.1 137.0 276.0 108.9 143.3 261.2 102.7 149.2 246.2 96.4 154.6 231.3 150,300A/B 184.0 187.8 440.7 173.8 197.6 416.3 163.7 206.4 392.1 153.5 214.6 367.6 143.3 221.8 343.1 175,350A/B 207.8 225.7 497.6 196.5 236.7 470.8 185.3 246.9 443.7 174.0 256.2 416.9 162.7 264.6 389.7 200,400A/B

227.5 261.7 544.9 215.5 274.2 516.2 203.5 285.4 487.5 191.4 296.0 458.6 179.3 305.4 429.4

050 57.7 58.2 138.4 54.7 61.7 131.4 51.8 64.9 124.2 48.8 67.8 117.0 45.7 70.5 109.7

060 68.0 67.6 163.2 64.5 71.6 154.9 61.1 75.3 146.6 57.6 78.8 138.3 54.1 82.0 129.9

070 79.3 75.9 190.4 75.1 80.8 180.3 71.0 85.4 170.3 66.8 89.7 160.3 62.6 93.7 150.1

080 91.8 81.5 220.2 86.9 86.4 208.6 82.0 90.8 196.9 77.2 95.1 185.4 72.4 99.0 173.7

090 102.7 103.9 246.6 97.2 110.1 233.2 91.6 115.8 219.7 85.9 121.1 206.2 80.2 125.9 192.5

100 114.1 111.1 273.8 107.9 117.7 259.0 101.9 123.9 244.5 95.7 129.7 229.8 89.6 135.0 215.1

110 125.5 133.1 301.3 119.2 140.1 286.2 113.0 146.6 271.1 106.6 152.7 255.8 100.2 158.4 240.5 150,300A/B 190.7 191.8 456.9 180.3 202.0 432.2 170.0 211.2 407.3 159.5 219.8 382.3 149.0 227.4 357.1 175,350A/B 215.4 230.7 516.2 203.9 242.2 488.7 192.4 252.8 461.2 180.9 262.5 433.5 - - - 200,400A/B

235.7 267.6 564.9 223.5 280.5 535.7 211.2 292.2 506.2 198.9 303.2 476.6 - - -

Page 27

Performance data (cont)

COOLING CAPACITIES - ENGLISH

CONDENSER ENTERING AIR TEMPERATURE (F)

85 95 105 115 125

UNIT SIZE

30GTN,GTR

GBN,GBR

LCWT

(F)

Cap.

Input

Cooler

Flow Rate

Cap.

Input

Cooler

Flow Rate

Cap.

Input

Cooler

Flow Rate

Cap.

Input

Cooler

Flow Rate

Cap.

Input

Cooler

Flow Rate

050 59.6 59.3 143.1 56.6 62.9 135.9 53.6 66.2 128.6 50.5 69.3 121.3 47.4 72.1 113.8

060 70.3 68.8 168.8 66.8 73.0 160.3 63.2 76.8 151.8 59.7 80.4 143.2 56.1 83.8 134.7

070 82.1 77.3 197.1 77.7 82.3 186.7 73.4 87.0 176.4 69.2 91.5 166.2 64.9 95.6 155.8

080 94.9 83.1 227.8 90.0 88.1 216.1 85.0 92.8 204.2 80.0 97.1 192.1 75.1 101.2 180.3

090 106.3 106.0 255.2 100.6 112.3 241.5 94.8 118.3 227.7 89.1 123.8 213.8 83.3 128.8 199.9

100 118.2 113.4 283.9 112.0 120.2 268.9 105.7 126.6 253.8 99.5 132.6 238.8 93.2 138.2 223.8

110 130.0 136.0 312.2 123.5 143.2 296.6 117.1 150.0 281.1 110.6 156.3 265.5 104.0 162.2 249.7 150,300A/B 197.6 195.9 473.8 187.0 206.5 448.4 176.5 216.1 423.1 165.6 225.0 397.2 154.9 233.0 371.3 175,350A/B 223.3 235.9 535.3 211.4 247.7 507.0 199.6 258.7 478.7 187.8 268.8 450.3 - - - 200,400A/B

244.1 273.6 585.4 231.7 287.0 555.5 219.1 299.2 525.3 206.4 310.6 494.9 - - -

050 69.5 64.6 167.2 65.4 68.2 157.2 61.2 71.4 147.3 57.1 74.4 137.3 53.0 77.0 127.4

060 79.9 73.7 192.2 75.2 77.9 180.9 70.6 81.7 169.8 66.0 85.1 158.7 61.4 88.2 147.7

070 95.1 83.6 228.9 90.2 89.1 216.9 84.2 93.8 202.5 78.4 98.0 188.5 72.6 101.9 174.6

080 106.6 89.0 256.4 100.1 93.9 240.8 93.7 98.4 225.3 87.3 102.4 210.1 81.0 106.1 195.0

090 122.0 114.8 293.5 114.2 121.1 274.8 106.6 126.7 256.3 98.9 131.8 238.0 - - -

100 138.3 123.8 332.7 129.7 130.7 312.1 121.3 137.0 291.8 113.0 142.8 271.7 104.7 148.0 251.9

110 153.6 150.9 369.5 145.6 158.7 350.3 136.4 165.1 328.0 127.4 171.0 306.5 118.6 176.4 285.2 150,300A/B 234.4 217.7 563.1 222.5 230.0 534.5 210.4 241.5 505.5 198.1 252.1 475.9 - - - 175,350A/B 264.6 262.8 635.5 251.5 276.8 604.1 238.3 289.9 572.4 - - - - - - 200,400A/B

288.8 305.2 693.7 274.9 320.6 660.2 260.7 335.1 626.3 - - - - - -

LEGEND

Cap. — Cooling Capacity Tons of Refrigeration Input kW — Compressor Power Input LCWT — Leaving Chilled Water Temperature (F)

NOTES:

1. Ratings apply to units with electronic or thermostatic expansion valves.

2. All ratings are in accordance with ARI (Air Conditioning and Refrigeration Institute, U.S.A.) Standard 590-92, based on: a. A cooler water temperature rise of 10° F. When greater accuracy is desired, correct design LCWT, before entering rating tables, by reference to the LCWT correction curve. b. A fouling factor of 0.00025 in the cooler. c. Refrigerant 22.

3. When a corrected LCWT is used, cooler pressure drop must also be corrected for new LCWT: a. Enter rating table for corrected LCWT. By interpolation, determine corrected capacity (tons) and power input (kW) to compressor at its rated voltage. b. Calculate corrected flow rate through the cooler: = 24 x capacity in tons = U.S. gpm temperature rise °F c. On Cooler Pressure Drop chart (pages 32 and 33),enter cooler pressure drop curve at corrected flow rate and read pressure drop.

4. When chilled water temperature rise is less than 5 F, high flow rate will normally be accompanied by an excessive pressure drop. In such cases, contact your Carrier representative for special selection of a cooler with wider baffle spacing.

Page 28

Performance data (cont)

COOLING CAPACITIES – SI

CONDENSER ENTERING AIR TEMPERATURE (C)

30 35 40 45 50

UNIT SIZE

30GTN,GTR

GBN,GBR

LCWT

(C)

Cap.

Input

Cooler

Flow Rate

Cap.

Input

Cooler

Flow Rate

Cap.

Input

Cooler

Flow Rate

Cap.

Input

Cooler

Flow Rate

Cap.

Input

Cooler

Flow Rate

050 173.5 54.0 7.4 165.0 56.6 7.1 156.4 59.0 6.7 147.8 61.2 6.3 139.1 63.2 6.0

060 204.1 62.6 8.8 194.3 65.7 8.3 184.5 68.5 7.9 174.7 71.2 7.5 164.9 73.7 7.1

070 238.2 70.6 10.2 226.1 74.3 9.7 214.1 77.8 9.2 202.1 81.1 8.7 190.1 84.1 8.2

080 274.7 75.2 11.8 260.7 78.9 11.2 247.0 82.3 10.6 233.3 85.5 10.0 219.6 88.5 9.4

090 307.8 95.7 13.2 291.8 100.4 12.5 275.7 104.7 11.8 259.8 108.7 11.2 243.7 112.3 10.5

100 338.4 102.1 14.5 321.3 107.1 13.8 304.0 111.8 13.0 286.9 116.2 12.3 269.8 120.2 11.6

110 374.5 121.6 16.1 356.6 126.9 15.3 338.7 131.9 14.5 320.8 136.5 13.8 302.7 140.8 13.0 150,300A/B 566.8 175.4 22.5 537.6 183.0 21.3 508.4 189.9 20.2 478.7 196.2 19.0 449.4 201.9 17.8 175,350A/B 640.5 210.3 25.4 608.1 219.0 24.1 575.6 227.0 22.9 542.7 234.2 21.6 509.8 240.6 20.2 200,400A/B

702.8 243.9 27.9 667.9 253.6 26.5 632.6 262.3 25.1 597.4 270.5 23.7 562.2 277.9 22.3

050 179.1 54.9 7.7 170.4 57.6 7.3 161.7 60.1 6.9 152.9 62.5 6.6 144.0 64.6 6.2

060 210.8 63.7 9.1 200.8 66.9 8.6 190.7 69.8 8.2 180.7 72.6 7.8 170.6 75.1 7.3

070 245.9 71.7 10.6 233.6 75.6 10.0 221.4 79.3 9.5 209.1 82.7 9.0 196.9 85.8 8.5

080 283.8 76.6 12.2 269.7 80.4 11.6 255.5 84.0 11.0 241.5 87.3 10.4 227.5 90.4 9.8

090 318.1 97.5 13.7 301.6 102.3 13.0 285.2 106.8 12.3 268.8 111.0 11.5 252.5 114.8 10.8

100 350.4 104.0 15.1 332.6 109.2 14.3 314.9 114.1 13.5 297.5 118.7 12.8 279.9 122.9 12.0

110 387.4 124.1 16.6 369.0 129.6 15.9 350.6 179.0 15.1 332.3 239.5 14.3 313.9 144.0 13.5 150,300A/B 586.8 178.9 23.3 556.7 186.9 22.1 526.9 194.0 20.9 496.5 200.7 19.7 466.2 206.6 18.5 175,350A/B 662.8 214.6 26.3 629.6 223.6 25.0 596.5 232.0 23.7 562.8 239.5 22.4 529.0 246.3 21.0 200,400A/B

727.1 248.9 28.9 691.4 259.0 27.5 655.3 268.1 26.0 619.3 276.7 24.6 583.2 284.4 23.2

050 184.8 55.8 7.9 176.0 58.7 7.6 167.1 61.3 7.2 158.1 63.7 6.8 149.0 65.9 6.4

060 217.6 64.8 9.4 207.3 68.1 8.9 197.0 71.1 8.5 186.7 74.0 8.0 176.4 76.6 7.6

070 253.9 72.9 10.9 241.4 76.9 10.4 228.8 80.7 9.8 216.3 84.2 9.3 203.8 87.5 8.8

080 292.9 78.0 12.6 278.7 81.9 12.0 264.3 85.6 11.4 249.8 89.0 10.7 235.5 92.3 10.1

090 328.5 99.3 14.1 311.8 104.3 13.4 294.9 108.9 12.7 278.1 113.3 12.0 261.3 117.2 11.2

100 362.5 106.0 15.6 344.5 111.4 14.8 326.4 116.4 14.0 308.3 121.2 13.3 290.3 125.6 12.5

110 400.4 126.6 17.2 381.7 132.3 16.4 362.9 137.6 15.6 344.1 142.6 14.8 325.1 147.2 14.0 150,300A/B 607.1 182.5 24.1 576.4 190.7 22.9 545.7 198.2 21.7 514.7 205.2 20.5 483.6 211.4 19.2 175,350A/B 685.8 219.0 27.3 651.7 228.4 25.9 617.9 237.1 24.6 583.2 244.9 23.2 549.0 252.1 21.8 200,400A/B

751.8 254.1 29.9 715.3 264.5 28.4 678.4 274.0 27.0 641.6 282.9 25.5 604.7 291.0 24.0

050 190.6 56.8 8.2 181.6 59.7 7.8 172.5 62.4 7.4 163.3 64.9 7.0 154.1 67.2 6.6

060 224.5 65.9 9.7 214.0 69.3 9.2 203.5 72.4 8.8 192.9 75.4 8.3 182.4 78.2 7.8

070 261.9 74.1 11.3 249.1 78.3 10.7 236.4 82.2 10.2 223.6 85.8 9.6 210.8 89.2 9.1

080 302.6 79.4 13.0 287.7 83.4 12.4 273.2 87.3 11.8 258.5 90.9 11.1 243.6 94.2 10.5

090 339.0 101.1 14.6 322.0 106.3 13.8 304.9 111.1 13.1 287.6 115.6 12.4 270.4 119.7 11.6

100 375.0 108.0 16.1 356.4 113.5 15.3 337.9 118.8 14.5 319.3 123.7 13.7 300.9 128.3 12.9

110 413.7 129.0 17.8 394.6 134.9 17.0 375.4 140.5 16.1 356.1 145.6 15.3 336.6 150.5 14.5 150,300A/B 628.1 186.2 25.0 596.3 194.6 23.7 564.9 202.4 22.5 533.2 209.7 21.2 501.3 216.2 19.9 175,350A/B 709.0 223.4 28.2 674.3 233.2 26.8 639.4 242.1 25.4 604.6 250.5 24.1 569.2 257.9 22.6 200,400A/B

777.1 259.3 30.9 739.8 270.1 29.4 702.0 279.9 27.9 664.8 289.3 26.4 626.6 297.6 24.9

050 196.5 57.7 8.5 187.3 60.8 8.1 178.1 63.6 7.7 168.7 66.2 7.3 159.3 68.6 6.9

060 231.4 67.0 10.0 220.8 70.5 9.5 210.1 73.8 9.0 199.3 76.8 8.6 188.5 79.7 8.1

070 270.1 75.3 11.6 257.1 79.6 11.1 244.2 83.6 10.5 231.0 87.4 9.9 218.0 91.0 9.4

080 312.3 80.8 13.4 297.1 85.0 12.8 282.1 88.9 12.1 267.2 92.7 11.5 251.9 96.1 10.8

090 349.7 102.9 15.1 332.3 108.3 14.3 314.9 113.3 13.6 297.4 118.0 12.8 279.7 122.2 12.0

100 387.4 110.0 16.7 368.7 115.7 15.9 349.7 121.2 15.0 330.8 126.2 14.2 311.8 131.0 13.4

110 427.1 131.6 18.4 407.6 137.7 17.5 388.0 143.4 16.7 368.3 148.8 15.9 348.3 153.8 15.0 150,300A/B 648.8 189.9 25.8 617.0 198.7 24.6 584.5 206.7 23.3 552.0 214.2 22.0 519.5 221.0 20.7 175,350A/B 732.9 228.0 29.2 697.4 238.0 27.8 661.5 247.3 26.3 625.7 255.9 24.9 589.4 263.6 23.5 200,400A/B

802.8 264.5 32.0 764.8 275.7 30.4 726.5 286.0 28.9 688.0 295.7 27.4 649.4 304.5 25.8

050 202.5 58.7 8.7 193.2 61.8 8.3 183.7 64.7 7.9 174.2 67.4 7.5 164.6 69.9 7.1

060 238.7 68.1 10.3 227.8 71.7 9.8 216.8 75.1 9.3 205.8 78.3 8.9 194.7 81.2 8.4

070 278.5 76.6 12.0 265.1 81.0 11.4 251.9 85.1 10.8 238.7 89.0 10.3 225.3 92.7 9.7

080 322.1 82.2 13.9 306.8 86.5 13.2 291.2 90.6 12.5 275.9 94.4 11.9 260.6 98.1 11.2

090 360.6 104.8 15.5 342.9 110.3 14.8 325.1 115.5 14.0 307.3 120.3 13.2 289.3 124.8 12.5

100 400.5 112.0 17.2 380.9 117.9 16.4 361.8 123.6 15.6 342.4 128.8 14.7 323.0 133.8 13.9

110 440.8 134.1 19.0 420.9 140.4 18.1 400.8 146.3 17.3 380.8 151.9 16.4 360.4 157.1 15.5 150,300A/B 670.3 193.6 26.7 637.5 202.6 25.4 604.9 211.0 24.1 571.4 218.8 22.8 538.0 226.0 21.4 175,350A/B 757.1 232.5 30.1 720.8 242.9 28.7 684.3 252.6 27.2 647.6 261.5 25.8 610.7 269.7 24.3 200,400A/B

829.0 269.9 33.0 790.1 281.4 31.5 751.0 292.0 29.9 711.8 302.2 28.3 672.3 311.3 26.8

Page 29

Performance data (cont)

COOLING CAPACITIES – SI

CONDENSER ENTERING AIR TEMPERATURE (C)

30 35 40 45 50

UNIT SIZE

30GTN,GTR

GBN,GBR

LCWT

(C)

Cap.

Input

Cooler

Flow Rate

Cap.

Input

Cooler

Flow Rate

Cap.

Input

Cooler

Flow Rate

Cap.

Input

Cooler

Flow Rate

Cap.

Input

Cooler

Flow Rate

050 208.6 59.7 9.0 199.1 62.9 8.6 189.5 65.9 8.2 179.8 68.7 7.7 169.9 71.3 7.3

060 246.0 69.3 10.6 234.9 73.0 10.1 223.7 76.4 9.6 212.3 79.7 9.1 201.0 82.8 8.7

070 287.2 77.8 12.4 273.4 82.3 11.8 259.8 86.6 11.2 246.4 90.6 10.6 232.8 94.4 10.0

080 332.0 83.6 14.3 316.5 88.1 13.6 300.8 92.3 13.0 284.9 96.3 12.3 269.3 100.0 11.6

090 371.8 106.6 16.0 353.7 112.3 15.2 335.5 117.7 14.4 317.2 122.7 13.7 298.9 127.4 12.9

100 413.6 114.1 17.8 393.8 120.2 17.0 373.9 126.0 16.1 354.2 131.4 15.3 334.4 136.6 14.4

110 455.1 136.7 19.6 434.4 143.2 18.7 414.0 149.3 17.8 393.4 155.1 16.9 372.7 160.5 16.1 150,300A/B 692.2 197.3 27.6 658.6 206.7 26.2 625.3 215.4 24.9 591.0 223.5 23.5 556.9 231.0 22.2 175,350A/B 782.2 237.3 31.2 744.7 247.9 29.7 707.3 257.9 28.2 670.0 267.2 26.7 632.3 275.7 25.2 200,400A/B

855.2 275.3 34.1 816.0 287.2 32.5 776.0 298.3 30.9 736.0 308.7 29.3 695.6 318.2 27.7

050 227.5 62.6 9.8 217.5 66.1 9.4 207.3 69.4 8.9 197.1 72.5 8.5 186.7 75.4 8.0

060 268.4 72.7 11.6 256.6 76.7 11.1 244.9 80.6 10.6 233.0 84.2 10.0 220.2 87.3 9.5

070 313.6 81.6 13.5 299.3 86.5 12.9 284.8 91.1 12.3 270.2 95.5 11.7 255.7 99.6 11.0

080 360.1 87.6 15.5 342.3 92.3 14.8 324.6 96.7 14.0 306.7 100.8 13.2 288.9 104.6 12.5

090 405.9 112.4 17.5 386.9 118.6 16.7 367.7 124.4 15.9 348.4 130.0 15.0 328.1 134.9 14.1

100 454.3 120.3 19.6 433.1 127.0 18.7 412.1 133.4 17.8 391.1 139.4 16.9 369.8 145.1 15.9

110 498.6 144.7 21.5 476.9 151.8 20.6 455.1 158.5 19.6 433.1 164.9 18.7 410.7 170.9 17.7 150,300A/B 760.4 208.9 30.3 724.5 219.2 28.9 688.5 228.8 27.5 652.3 237.9 26.0 - - - 175,350A/B 858.5 251.6 34.2 819.1 263.4 32.7 779.8 274.4 31.1 739.4 284.5 29.5 - - - 200,400A/B

938.1 292.1 37.4 896.0 305.1 35.7 853.5 317.1 34.0 811.0 328.7 32.3 - - -

050 243.1 65.0 10.5 230.0 68.2 9.9 216.9 71.1 9.4 203.8 73.8 8.8 190.7 76.2 8.2

060 279.5 74.2 12.1 264.6 77.9 11.4 249.9 81.3 10.8 235.3 84.5 10.2 220.9 87.3 9.5

070 336.4 84.6 14.5 317.2 89.1 13.7 298.3 93.3 12.9 279.8 97.2 12.1 261.4 100.8 11.3

080 372.8 89.5 16.1 352.2 93.9 15.2 331.8 97.9 14.3 311.7 101.6 13.5 291.8 105.0 12.6

090 426.6 115.5 18.4 402.0 121.1 17.3 377.6 126.2 16.3 353.5 130.8 15.3 329.6 135.0 14.2

100 483.7 124.5 20.9 456.6 130.7 19.7 429.8 136.4 18.5 403.3 141.7 17.4 377.1 146.5 16.3

110 540.3 152.1 23.3 511.4 158.5 22.1 482.9 164.4 20.8 454.6 169.9 19.6 426.4 174.9 18.4 150,300A/B 832.0 221.0 33.2 792.4 231.9 31.6 751.8 241.9 30.0 711.4 251.4 28.4 - - - 175,350A/B 939.3 266.8 37.5 897.4 279.5 35.8 855.4 291.5 34.1 812.8 302.7 32.4 - - - 200,400A/B

- 309.9 40.9 980.6 323.9 39.1 935.5 336.9 37.3 - - - - - -

LEGEND

Cap. — Cooling Capacity kW of Refrigeration Input kW — Compressor Power Input LCWT — Leaving Chilled Water Temperature (C)

NOTES:

1. Ratings apply to units with electronic or thermostatic expansion valves.

2. All ratings are in accordance with ARI (Air Conditioning and Refrigeration Institute, U.S.A.) Standard 590-92, based on: a. A cooler water temperature rise of 6° C. When greater accuracy is desired, correct design LCWT, before entering rating tables, by reference to the LCWT correction curve. b. A fouling factor of 0.000018 in the cooler. c. Refrigerant 22.

3. When a corrected LCWT is used, cooler pressure drop must also be corrected for new LCWT: a. Enter rating table for corrected LCWT. By interpolation, determine corrected capacity (kW) and power input (kW) to compressor at its rated voltage. b. Calculate corrected flow rate through the cooler: = 0.239 x capacity in kW = L/s temperature rise °C c. On Cooler Pressure Drop chart (pages 32 and 33),enter cooler pressure drop curve at corrected flow rate and read pressure drop.

4. When chilled water temperature rise is less than 3 C, high flow rate will normally be accompanied by an excessive pressure drop. In such cases, contact your Carrier representative for special selection of a cooler with wider baffle spacing.

Page 30

Electrical data

UNIT ELECTRICAL DATA

CONTROL CIRCUIT

CONTROL POWER

UNIT POWER

V-Ph-Hz

V-PH-Hz Min Max

MCA and

MOCP

400-3-50 230-1-50 198 264 15

COMPRESSOR ELECTRICAL DATA

COMPRESSOR NUMBERS

A1 A2 A3 A4 B1 B2 B3 B4

UNIT SIZE 30GTN,GTR, GBN,GBR

NOMINAL VOLTAGE

V-Ph-Hz

RLA LRA RLA LRA RLA LRA RLA LRA RLA LRA RLA LRA RLA LRA RLA LRA

050-XL 400-3-50 56 253 - - ----77345------

050-PW 400-3-50 56 152 - - ----77207------

060-XL 400-3-50 77 345 - - ----77345------

060-PW 400-3-50 77 207 - - ----77207------

070-XL 400-3-50 48 223 48 223 ----77345------

070-PW 400-3-50 48 134 48 134 ----77207------

080-XL 400-3-50 48 223 77 345 ----77345------

080-PW 400-3-50 48 134 77 207 ----77207------

090-XL 400-3-50 48 223 77 345 ----4822356253----

090-PW 400-3-50 48 134 77 207 ----4813456152----

100-XL 400-3-50 48 223 77 345 ----4822377345----

100-PW 400-3-50 48 134 77 207 ----4813477207----

110-XL 400-3-50 77 345 77 345 ----7734577345----

110-PW 400-3-50 77 207 77 207 ----7720777207----

150-XL 400-3-50 56 253 77 345 77 345 - - 56 253 77 345 77 345 - -

150-PW 400-3-50 56 152 77 207 77 207 - - 56 152 77 207 77 207 - -

175-XL 400-3-50 56 253 77 345 77 345 - - 56 253 77 345 77 345 77 345

175-PW 400-3-50 56 152 77 207 77 207 - - 56 152 77 207 77 207 77 207

200-XL 400-3-50 56 253 77 345 77 345 77 345 56 253 77 345 77 345 77 345

200-PW 400-3-50 56 152 77 207 77 207 77 207 56 152 77 207 77 207 77 207

300A-XL 400-3-50 56 253 77 345 77 345 - - 56 253 77 345 77 345 - -

300A-PW 400-3-50 56 152 77 207 77 207 - - 56 152 77 207 77 207 - -

300B-XL 400-3-50 56 253 77 345 77 345 - - 56 253 77 345 77 345 - -

300B-PW 400-3-50 56 152 77 207 77 207 - - 56 152 77 207 77 207 - -

350A-XL 400-3-50 56 253 77 345 77 345 - - 56 253 77 345 77 345 77 345

350A-PW 400-3-50 56 152 77 207 77 207 - - 56 152 77 207 77 207 77 207

350B-XL 400-3-50 56 253 77 345 77 345 - - 56 253 77 345 77 345 77 345

350B-PW 400-3-50 56 152 77 207 77 207 - - 56 152 77 207 77 207 77 207

400A-XL 400-3-50 56 253 77 345 77 345 77 345 56 253 77 345 77 345 77 345

400A-PW 400-3-50 56 152 77 207 77 207 77 207 56 152 77 207 77 207 77 207

400B-XL 400-3-50 56 253 77 345 77 345 77 345 56 253 77 345 77 345 77 345

400B-PW 400-3-50 56 152 77 207 77 207 77 207 56 152 77 207 77 207 77 207

UNIT VOLTAGE

Supplied

MCA MOCP ICF

Rec

Fuse Size

UNIT

30GTN,GTR,

GBN,GBR

V-Hz

(3 Ph)

Min Max XL PW XL PW XL PW XL PW

050 400-50 342 440 166 166 200 200 415 277 200 200 060 400-50 342 440 194 194 225 225 442 304 225 225 070 400-50 342 440 213 213 250 250 461 323 250 250 080 400-50 342 440 242 242 250 250 490 352 250 250 090 400-50 342 440 269 269 250 250 517 379 250 250 100 400-50 342 440 297 297 300 300 545 407 300 300 110 400-50 342 440 355 355 350 350 603 465 350 350 150 400-50 342 440 480 480 500 500 729 591 500 500 175 400-50 342 440 557 557 600 600 806 668 600 600 200 400-50 342 440 634 634 700 700 883 745 700 700

300A 400-50 342 440 480 480 500 500 729 591 500 500 300B 400-50 342 440 480 480 500 500 729 591 500 500 350A 400-50 342 440 557 557 600 600 806 668 600 600 350B 400-50 342 440 557 557 600 600 806 668 600 600 400A 400-50 342 440 634 634 700 700 883 745 700 700 400B 400-50 342 440 634 634 700 700 883 745 700 700

Page 31

Electrical data (cont)

CONDENSER FAN DATA

CONDENSER FAN

UNIT SIZE 30GTN,GTR

GBN,GBR

NOMINAL VOLTAGE

(V-Ph-Hz)

TOTAL (Quantity) FLA (ea)

050 400-3-50 4 3.4 060 400-3-50 6 3.4 070 400-3-50 6 3.4 080 400-3-50 6 3.4 090 400-3-50 6 3.4 100 400-3-50 8 3.4 110 400-3-50 8 3.4 150 400-3-50 12 3.4 175 400-3-50 12 3.4

200 400-3-50 12 3.4 300A 400-3-50 12 3.4 300B 400-3-50 12 3.4 350A 400-3-50 12 3.4 350B 400-3-50 12 3.4 400A 400-3-50 12 3.4 400B 400-3-50 12 3.4

LEGEND AND NOTES FOR ELECTRICAL DATA

LEGEND

FLA - Full Load Amps (Fan Motors) ICF - Maximum Instantaneous Current Flow during starting (the point in the starting sequence where the

sum of the LRA for the starting compressor, plus the total RLA for all running compressors, plus the total FLA for all running fan motors is maximum)

LRA - Locked Rotor Amps MCA - Minimum Circuit Amps (for wire sizing) – complies

with NEC Section 430-24

MOCP - Maximum Overcurrent Protection Device Amps Rec Fuse- Recommended dual-element fuse amps: 150% of largest size compressor RLA plus 100% of sum of

remaining compressor RLAs. Size up to the next larger fuse size. RLA - Rated Load Amps (compressors) *Units are suitable for use on electrical systems where voltage supplied to the unit terminals is not below or above the listed minimum and maximum limits. Maximum allowable phase imbalance is: voltage, 2%; amps 10%.

NOTES:

1. All units/modules have single point primary power connection. (Each unit/module requires its own power supply). Main power must be supplied from a field-supplied disconnect.

2. The unit control circuit power (230 v, single-phase) must be supplied from a separate source through a field-supplied disconnect. The control circuit transformer accessory may be applied to power from primary unit power.

3. Crankcase heaters are wired into the control circuit so they are always operable as long as the control circuit power supply disconnect is on, even if any safety device is open, and the unit ON/OFF switch is in the OFF position.

4. Units have the following power wiring terminal blocks and parallel conductors:

UNIT SIZE

30GTN,GTR,

GBN,GBR

VOLTAGE

TERMINAL

BLOCKS

PARALLEL

CONDUCTORS

050 to 070 400 1 3 080 to 110 400 1 3

150 to 200,

300A/B to

400A/B

400 2 6

5. Maximum incoming wire size for each terminal block is 500 kcmil.

6. Power draw control circuits include crankcase heaters. Each compressor has a crankcase heater which draws 180 watts of power.

Page 32

Controls

Microprocessor

The ComfortLink™ microprocessor controls overall unit operation. Its central executive routine controls a number o

processes simultaneously. These include internal timers, reading inputs, analog to digital conversions, fan control, display control, diagnostic control, output relay control, demand limit, capacity control, head pressure control, and temperature reset. Some processes are updated almost continuously, others every 2 to 3 seconds, and so me ever y 30 seconds. The microprocessor routine is started by switching the Emergency ON-OFF circuit breaker switch (switch 2) to ON position. When the unit receives a call for cooling (either from the internal control or CCN network command), the unit stages up in capacity to maintain the cooler fluid set point. The first compressor starts 11/2 to 3 minutes after the call for cooling. The lead circuit can be specifically designated or randomly selected by the controls, depending on how the unit is field configured. A field configuration is also available to determine if the unit should stage up both circuits equally or load one circuit completely before bringing on the other. The ComfortLink microprocessor controls the capacity o

the chiller by cycling compressors on and off at a rate to satisfy actual dynamic load conditions. The control maintains leaving-fluid temperature set point shown on scrolling marquee display board through intelligent cycling o

compressors. Accuracy depends on loop volume, loop flow rate, load, outdoor-air temperature, number of stages, and particular stage being cycled off. No adjustment for cooling range or cooler flow rate is required, because the control automatically compensates for cooling range by measuring both return-fluid temperature and leaving-fluid temperature. This is referred to as leaving-fluid temperature control with return-fluid temperature compensation. The basic logic for determining when to add or remove a stage is a time band integration of deviation from set point plus rate of change of leaving-fluid temperature. When leaving-fluid temperature is close to set point and slowly moving closer, logic prevents addition of another stage. I

leaving-fluid temperature is less than 34 F (1.1 C) for water, or 6° F (3.3° C) below the set point for brine units, the unit is shut off until the fluid temperature goes to 34 F (1.1 C) or to 6° F (3.3° C) above the set point to protect against freezing. If 1° F per minute (0.6° C per minute) pulldown control has been selected (factory setting), no additional steps o

capacity are added as long as difference between leavingfluid temperature and set point is greater than 4° F (2.2° C) and rate of change in leaving-fluid temperature is less than 1° F per minute (0.6° C per minute). If it has been less than 90 seconds since the last capacity change, compressors will continue to run unless a safety device trips. This prevents rapid cycling and also helps return oil during short on periods. Lead/lag operation can be configured to balance compressor operating hours when set to automatic. When lead/lag operation is configured to automatic, a compresso

wear factor is used to determine which circuit to start first by utilizing a combination of actual run hours and number

starts. Lag compressors in a circuit would also be started to maintain even wear factors. Either circuit can be set to always lead, if desired. The control also performs other special functions when turning on or off. When a circuit is to be turned off, EXV is closed first, and compressor is run until conditions are met to terminate pumpout to remove refrigerant that was in the cooler. At start-up, if a circuit has not run in the last 15 minutes, circuit is run to remove any refrigerant that has migrated to the cooler. The oil pressure switch is bypassed for 2 minutes during start-up and for 1 minute during normal operation.

Thermistors

Eight thermistors are used for temperature-sensing inputs to microprocessor. (A ninth [T9] and/or tenth [T10] may be used as a remote temperature sensor for optional LCWT reset.) T1 Cooler leaving chilled fluid temperature T2 Cooler entering fluid (return) temperature T3 Saturated condensing temperature — Circuit A T4 Saturated condensing temperature — Circuit B T5 Cooler saturation temperature — Circuit A T6 Cooler saturation temperature — Circuit B T7 Return gas temperature entering compressor cylinder — Circuit A T8 Return gas temperature entering compressor cylinder — Circuit B T9 Outdoor air temperature sensor (accessory) T10 Remote space temperature sensor (accessory) The microprocessor uses these temperatures to control capacity, fan cycling, and EXV operation.

Electronic expansion valve (EXV)

To control flow of refrigerant for different operating conditions, EXV piston moves up and down over slot orifices through which refrigerant flows to modulate size of opening. Piston is moved by a stepper motor through 1500 discrete steps. The piston is repositioned by the microprocessor every 3 seconds as required. The EXV is used to control superheat in compressor. The difference between 2 thermistors (compressor return gas temperature minus cooler saturation temperature) is used to determine superheat. The EXV is controlled to maintain superheat entering pistons at approximately 29 F (16.1 C), which results in slightly superheated refrigerant leaving cooler. The electronic control provides for a prepurge and pumpout cycle each time the lead compressor in a circuit is started or stopped. These pumpout cycles minimize amount of excess refrigerant that can go to compressor on start-up and cause oil dilution (which would result in eventual bearing wear). The microprocessor software is programmed so that EXV functions as an MOP (maximum operating pressure)

Page 33

Accessory controls

Demand can be further limited by keeping a selected number o

compressors from turning on by utilizing demand limit control (the Energy Management Module is required for this function). This FIOP/accessory interfaces with microprocessor to control unit so that chiller’s kW demand does not exceed its setting. It is activated from an external switch. The standard ComfortLink™ control is programmed to accept various accessory temperature reset options (based on return-fluid temperature, outdoor-air temperature, or space temperature), that reset the LCWT. An accessory thermistor (T9 or T10) is required if outdoor-air temperature or space temperature reset is selected. The Energy Management Module (EMM) is only required fo

temperature reset that is initiated by a 4 to 20 mA signal.

Ground current protection

The 070-400 sizes have ground current protection that shuts of

compressor(s) if a 2 to 3 amp grou nd current is sensed by a toroid around the compressor power leads.

30GTN,GTR,GBN,GBR ComfortLink controls with Scrolling Marquee display module

A standard four-digit alphanumeric display shows all of the ComfortLink control codes (with expandable clear language), plus set points, time of day, temperatures, pressures, and superheat. Additional information can be displayed all at once with the Navigator display.

Control sequence

Off cycle — During unit off cycle, crankcase heater is energized.

If ambient temperature is below 36 F (2 C), cooler heaters (i

equipped) are also energized. Electronic expansion valves are closed. Start-up — After control circuit switches on, prestart process takes place, then microprocessor checks itself and waits for temperature to stabilize. First circuit to start may be A or B (automatic lead/lag feature). The controlled pulldown feature limits compressor loading on start-up to reduce demand on startup and unnecessary compressor usage. The microprocessor limits supply-fluid temperature decrease (start-up only) to 1° F (0.6° C) per minute.

Capacity control

On first call for cooling, microprocessor starts initial compresso

and fan stage on lead circuit. The EXV remains closed, permitting a pumpout on startup. After pumpout, the valves open and, if necessary, additional outdoor fans are energized. Crankcase heaters are deenergized when a compressor is star ted. As additional cooling is required, lag circuit starts. If further cooling is needed, compressors are added, alternating between lead and lag circuits. Speed at which capacity is added or decreased is controlled by temperature deviation from set point and rate of temperature change of chilled fluid. As less cooling is required, circuits shut down (or unload) in an order that balances each circuit’s compressor run time (depending upon configuration). When no further cooling is called for (in each compressor circuit), EXV closes and compressor and fans continue to run while pumping down cooler.

Control features

Low-temperature override — This feature prevents LCWT

from overshooting the set point and possibly causing a nuisance trip-out by the freeze protection. High-temperature override — This feature allows chiller to add capacity quickly during rapid load variations. Demand limit — If applied, limits the total power draw of unit to selected point by controlling number of operational compressors during periods of peak electrical demand. The Energy Management Module is required for either 2-stage or 4 to 20 mA demand limit.

Temperature reset — If applied, microprocessor compares either return fluid, space temperature, or outdoor-air temperature with the accessory board settings, and adjusts LCWT appropriately. The Energy Management Module can also be added for 4 to 20 mA reset.

Electronic expansion valve and condenser-fan control

—

The EXV opens and closes on signal from microprocessor to maintain an approximate 29° F (16° C) refrigerant superheat entering the compressor cylinders. (The compressor moto

increases the refrigerant superheat from the approximate 5° F [3° C] leaving the cooler to that entering the cylinders.) Condenser fans (operated by microprocessor) run to as low an ambient as possible to maintain a minimum EXV pressure differential.

Abnormal conditions

All control safeties in chiller operate through compressor

rotection board or control relay and microprocessor. High pressure switch directly shuts down compressor(s) through compressor protection board or control relay. For other safeties, microprocessor makes appropriate decision to shut down a compressor due to a safety trip or bad sensor reading and displays appropriate failure code on the display. Chiller holds in safety mode until reset. It then reverts to normal control when unit is reset. Oil pressure safety — Safety cuts out if pressure differential is below minimum. Safety is bypassed on start-up for 2 minutes. Loss-of-charge safety — Safety cuts out if system pressure drops below minimum. High-pressure cutout — Switch shuts down compressors if compressor discharge pressure increases to 426 psig (2918 kPa). Ground current safety — Safety opens on sensing a current-to-ground in compressor windings in excess of 2.5 amps. Compressor anti-cycling — This feature limits compressor cycling. Loss of flow protection — Additional protection is provided by temperature differences between entering and leaving fluid temperature sensors if cooler temperature drops to 34 F (1.1 C). Proof of flow switches are recommended. Sensor failures — Failures are detected by the microprocessor.

Diagnostics

Microprocessor may be put through service test (see Controls, Start-Up, Operation, Service and Troubleshooting literature) without additional equipment or tools. Service test confirms microprocessor is functional, informs observer through display the condition of each sensor and switch in chiller, and allows observer to check for proper operation o

fans and compressor(s).

Default settings

To facilitate quick start-ups, all 30GTN,GTR,GBN,GB

chillers with ComfortLink™ controls are pre-configured with a default setting that assumes stand-alone operation supplying 44 F (6.7 C) chilled water.

Configuration setting will be based on any options o

accessories included with the unit at the time o

manufacturing. Date and time will need reconfiguring based on location and local time zone. If operation based on occupancy scheduling is desired, this will also need to b e set during installation.

Page 34

Typical piping and wiring — 30GTN,GTR050-110, GBN,GBR150-200

Page 35

Typical piping and wiring — 30GBN,GBR300-400

Page 36

Guide specifications

Reciprocating Air-Cooled Liquid Chiller

HVAC Guide Specifications

Size Range: 50 to 400 Tons (176 to 1408 kW) Nominal Carrier Model Number: 30GTN,GTR,GBN,GBR

Part 1 — General

1.01 SYSTEM DESCRIPTION Easy-to-use, microprocessor-controlled air-cooled liquid chiller utilizing reciprocating compressors and long-stroke electronic expansion valves.

1.02 QUALITY ASSURANCE A. Unit shall be manufactured in a facility registered to ISO 9001 (International Standards Organization) manufacturing quality standard. E. Unit operation shall be fully tested at the factory.

1.03 DELIVERY, STORAGE, AND HANDLING A. Unit shall be stored and handled per unit manufacturer’s recommendations. B. Unit controls shall be capable of withstanding 150 F (66 C) storage temperature in the control compartment for an indefinite period of time.

Part 2 — Products

2.01 EQUIPMENT A. General: Factory-assembled, single piece, air-cooled liquid chiller. Contained within the unit cabinet shall be all factory wiring, piping, controls, refrigerant charge (R-22), and special features required prior to field start-up. B. Unit Cabinet:

1. Frame shall be of heavy-gage galvanized steel members.

2. Cabinet shall be galvanized steel casing with a pre-painted finish.

3. Cabinet shall be capable of withstanding 500-hour salt spray test in accordance with the ASTM B-117 standard. C. Fans: Condenser fans shall be direct-driven propeller type discharging air vertically upward and shall be equipped with the following features:

1. Permanently lubricated bearings.

2. Steel wire safety guards.

3. Statically and dynamically balanced fan blades. D. Compressors:

1. Reciprocating semi-hermetic type only.

2. Each equipped with an automatically-reversible oil pump, operating oil charge, suction and discharge shutoff valves, and an insert-type factory-sized crankcase heater to control oil dilution.

3. Each mounted on spring vibration isolators with an isolation efficiency of no less than 95%.

4. Speed shall not exceed 1750 rpm (29.2 r/s).

5. Cycles per hour per compressor shall not exceed 6.

E. Cooler:

1. Shell-and-tube type with removable heads.

2. Tubes shall be internally enhanced seamless-copper type rolled into tube sheets.

3. Equipped with flange type fluid connections.

4. Shell shall be insulated with

3/4-in. (19-mm) PVC

foam (closed-cell) with a maximum K factor of

0.28.

5. Design shall incorporate 2 independent direct expansion refrigerant circuits.

6. Cooler shall be tested and stamped in accordance with ASME Code for a refrigerant working side pressure of 278 psig (1916 kPa). Cooler shall have a maximum fluid-side pressure of 300 psig (2068 kPa). F. Condenser:

1. Coil shall be air-cooled with integral subcooler, constructed of aluminum fins mechanically bonded to seamless copper tubes which are then cleaned, dehydrated, and sealed.

2. Air-cooled condenser coils shall be leak tested at 150 psig (1034 kPa) and pressure tested at 450 psig (3103 kPa). G. Refrigeration Components: Refrigerant circuit components shall include hot gas muffler, high side pressure sw itch, liquid line shutoff valves, suction and discharge shutoff valves, filter drier, moisture-indicating sight glass, stepper motor actuated electronic expansion valve (EXV) or thermostatic expansion valve (TXV), and complete operating charge of refrigerant R-22 and compressor oil. H. Controls, Safeties, and Diagnostics:

1. Controls: a. Unit controls shall include the following minimum components:

1) Microprocessor.

2) Power and control circuit terminal blocks.

3) ON/OFF control switch.

4) Replaceable solid-state relay panel.

5) Clear language, expandable, alpha numeric diagnostic display/set point panel.

6) Thermistor installed to measure saturated condensing temperature, cooler saturation temperature, compressor return gas temperature, and cooler entering and leaving fluid temperatures. b. Unit controls shall be capable of performing the following functions:

1) Automatic circuit lead/lag (accessory required for 040-070 sizes).

2) Pumpout at beginning and end of every circuit cycle.

3) Capacity control based on leaving chilled fluid temperature and compensated by rate of change of return-fluid temperature.

4) Limiting of the chilled fluid temperature pulldown rate at start-up to 1° F (.56° C) per minute to prevent excessive demand spikes (charges) at start-up.

5) Seven-day time schedule.

6) Leaving chilled fluid temperature reset from return fluid, outdoor-air temperature, space temperature, or 4 to 20 mA input.

7) Demand limit control with 2-stage control (0 to 100% each) or through 4 to 20 mA input (0 to 100%).

Page 37

2. Safeties: a. Unit shall be equipped with thermistors and all necessary components in conjunction with the control system to provide the unit with the following protections:

1) Loss of refrigerant charge protection.

2) Low fluid flow detection.

3) Low chilled fluid temperature protection.

4) Low and high superheat protection.

5) Low control voltage (to unit) protection.

6) High-pressure switch.

7) Low oil protection for each compressor circuit

8) Ground current compressor protection. b. Compressors shall be equipped with the following manual-reset type protections:

1) Pressure overload.

2) Electrical overload through the use of definite purpose contactors and calibrated, ambient compensated, magnetic trip circuit breakers. Circuit breakers shall open all 3 phases in the event of an overload in any one phase (single phasing condition). c. Fan motors shall have inherent overcurrent protection.

3. Diagnostics: a. The diagnostic display module shall be capable of indicating the safety lockout condition by displaying a code for which an explanation may be scrolled at the display. Information included for display shall be:

1) Compressor lockout.

2) Loss of charge.

3) Low fluid flow.

4) Low oil pressure.

5) Cooler freeze protection.

6) High or low suction superheat.

7) Thermistor malfunction.

8) Entering and leaving-fluid temperature.

9) Evaporator and condenser pressu re.

10) Electronic expansion valve positions.

11) All set points.

12) Time of day. b. Display module, in co njunction with the microprocessor, must also be capable of displaying the output (results) of a service test. Service test shall verify operation of every switch, thermistor, fan, and compressor before chiller is started. I. Operating Characteristics:

1. Unit shall be capable of starting and running fully loaded at outdoor ambient temperatures from 0° F to 125 F (–18 to 52 C), without special controls.

2. Unit shall be capable of starting up with 95 F (35 C) entering-fluid temperature to the cooler.

3. Multi-step cooling capacity control shall be accomplished through the use of unloaders and compressor staging.

4. Two refrigerant circuits shall be provided to protect against loss of total capacity.

5. Unit shall have automatic lead/lag feature to automatically alternate the lead circuit to ensure even compressor wear.

J. Motors:

1. Compressor motors shall be cooled by suction gas passing around motor windings.

2. Condenser-fan motors shall be 3-phase type with permanently lubricated bearings and Class B insulation.

3. Fan motors are totally enclosed, air-over (TEAO) type in accordance with IP-55. K. Electrical Requirements:

1. Unit primary electrical power supply (3-phase) shall be connected to a single location.

2. Unit control power (single-phase) shall be connected to a separate entry point.

3. Unit shall be shipped with factory control and power wiring installed.

Page 38

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.

Carrier International Sdn. Bhd., Malaysia

United Technologies Compan

Carrier