Sterling 882.93092.00 specifications Water-Cooled Portable Chillers, PWC-20, PWC-30

Page 49

Water-Cooled Portable Chillers

Nominal operating parameters for water-cooled models are 50ºF (10ºC) leaving water temperature at 2.4 gpm per ton (9.1 lpm per 3.517 kW) with 85ºF (29ºC) tower water. For 50 Hz applications, multiply capacity by 0.83. Nominal 60 Hz capacity flow rate must be maintained.

G-PWC-20

PERFORMANCE (NOMINAL DESIGN CONDITIONS, 60 HZ)

COOLING CAPACITY

5.12

 

TONS

ALTITUDE

 

SEA LEVEL

 

COOLANT SUPPLY TEMPERATURE

50

 

°F

COMPRESSOR POWER

 

4064

 

WATTS

CONDENSER INLET WATER

85

 

°F

EER

 

15.13

 

BTU/WATT

TEMPERATURE

 

 

 

 

 

 

 

 

 

 

 

COOLANT

WATER

 

CONDENSER WATER FLOW

 

15.9

 

GPM

COOLANT FLOW

13

 

GPM

SOUND POWER LEVEL

 

 

 

dBA

UNIT PRESSURE DROP

7

 

PSID

SOUND PRESSURE LEVEL @ 1 METER

 

 

dBA

OPERATING PARAMETERS

 

 

 

 

 

 

 

 

COOLANT SUPPLY TEMPERATURE

20-80

 

°F

COOLANT FLOW

 

15

 

GPM

CONDENSER INLET WATER

50-90

 

°F

MINIMUM LOAD

 

1.06

 

TONS

TEMPERATURE

 

 

 

 

 

 

 

 

 

 

 

SPECIFICATIONS

 

 

 

 

 

 

 

 

COMPRESSOR

SCROLL

 

 

EVAPORATOR FILTER

 

20 MESH

 

COOLANT PUMP

STAINLESS STEEL

 

COOLANT CIRCUIT

 

NON-FERROUS

 

CENTRIFUGAL

 

 

 

 

 

 

 

 

 

 

EVAPORATOR

BRAZED PLATE

 

CAPACITY CONTROL

 

HOT GAS BYPASS

CONDENSER

TUBE IN TUBE

 

REFRIGERANT

 

3 LBS R-410A

 

 

 

 

 

FRAME

 

GALVANIZED STEEL

 

 

 

 

PANELS

 

POWDER COATED STEEL

RESERVOIR

20 GALLON POLYETHYLENE

WEIGHT (OPERATING)

 

690

 

LBS

POWER

460V/3PH/60HZ

 

WEIGHT (SHIPPING)

 

520

 

LBS

CONTROL CIRCUIT

120

 

VDC

ELECTRICAL ENCLOSURE

 

NEMA 12

 

COMPRESSOR FULL LOAD AMPS

10.7

 

AMPS

CONTROL

 

MICROPROCESSOR

G-PWC-30

PERFORMANCE (NOMINAL DESIGN CONDITIONS)

COOLING CAPACITY

7.98

TONS

ALTITUDE

 

 

SEA LEVEL

COOLANT SUPPLY TEMPERATURE

50

°F

COMPRESSOR POWER

6416

 

WATTS

CONDENSER INLET WATER

85

°F

EER

14.92

 

BTU/WATT

TEMPERATURE

 

 

 

 

 

 

 

COOLANT

WATER

 

CONDENSER WATER FLOW

25.08

 

GPM

COOLANT FLOW

20

GPM

SOUND POWER LEVEL

 

 

dBA

UNIT PRESSURE DROP

7

PSID

SOUND PRESSURE LEVEL @ 1

dBA

 

METER

 

 

 

 

 

 

 

 

 

OPERATING PARAMETERS

 

 

 

COOLANT SUPPLY TEMPERATURE

20-80

°F

COOLANT FLOW

22.5

 

GPM

CONDENSER INLET WATER

50-90

°F

MINIMUM LOAD

1.672

 

TONS

TEMPERATURE

 

 

 

 

 

 

 

 

 

SPECIFICATIONS

 

 

 

COMPRESSOR

SCROLL

 

EVAPORATOR FILTER

20 MESH

 

COOLANT PUMP

STAINLESS STEEL

COOLANT CIRCUIT

NON-FERROUS

 

CENTRIFUGAL

 

 

 

 

 

 

 

 

EVAPORATOR

BRAZED PLATE

 

CAPACITY CONTROL

HOT GAS BYPASS

CONDENSER

TUBE IN TUBE

 

REFRIGERANT

4 LBS R-410A

 

 

 

 

FRAME

GALVANIZED STEEL

 

 

 

PANELS

POWDER COATED STEEL

RESERVOIR

20 GALLON POLYETHYLENE

WEIGHT (OPERATING)

870

 

LBS

POWER

460V/3PH/60HZ

 

WEIGHT (SHIPPING)

700

 

LBS

CONTROL CIRCUIT

120

VDC

ELECTRICAL ENCLOSURE

NEMA 12

 

COMPRESSOR FULL LOAD AMPS

16.4

AMPS

CONTROL

MICROPROCESSOR

GP Series Portable Chillers

Chapter 7: Appendix

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Contents GP Series Portable Chillers Shipping Information Table of Contents Appendix How to Use This Manual SafetySafety Symbols Used in this Manual Responsibility Models Covered in This Manual Functional DescriptionGeneral Description Chilled Water CircuitMechanical Features Standard FeaturesElectrical Features Refrigeration Features Safety Devices and InterlocksController Features Other FeaturesFlow Switch Optional FeaturesHigh Pressure Cutout Remote Start/Stop InterlockMounting Features Optional Pump Amperages Voltage Construction Full Load Amps Uncrating InstallationElectrical Connections Bypass Valve Considerations Process Water ConnectionsGalvanic Corrosion Considerations Water Treatment ConsiderationsWater-Cooled Chiller Condensers Condenser ConsiderationsAir-Cooled Chiller Condensers Remote Air-Cooled Chiller CondensersPage Page Equivalent Length in Feet for Valves and Fittings Total Equiv GP Series Portable Chillers Installation Discharge Line Sizing Refrigerant Charge Determination Checking Motor Direction Three-Phase CompressorsWater Pumps Condenser FanPart Number Description Water ReservoirPump Automatic Water Make-Up Option Finishing Setup Setting Up PasswordsInitial Start-Up Page Page Operation Panel Buttons, Indicator Lights, and SwitchesMicroprocessor Controller Main Status Screen Operator Setpoints Screen Status ScreensPage Access Levels Controller Setpoints Optional Communications AlarmsPage GP Series Portable Chillers Operation Filter Cleaning MaintenanceLubrication Maintaining the CondenserMaintaining the Evaporator Preventative Maintenance ServiceEvaporator Process Piping Y-Strainer GP Series Portable Chillers Troubleshooting TroubleshootingGP Series Portable Chillers Troubleshooting Appendix Warranty ReturnsReturned Material Policy Credit ReturnsTechnical Assistance Service DepartmentParts Department Sales DepartmentAir-Cooled Portable Chillers SpecificationsPAC-20 PAC-30PAC-50 PAC-40GPAC-70 TON GPAC-140 GPAC-105GPAC-210 GPAC-175PWC-20 Water-Cooled Portable ChillersPWC-30 PWC-50 PWC-40GPWC-70 GPWC-140 GPWC-105GPWC-210 GPWC-175Hertz Pump Curves Pump Curves, Flow, and Pressure ConsiderationsModel GP70 GP90 Capacity liter/min ALL 50 HzACS Chiller Pumps GPM DP PSI Pure Water at 40FRemote Air-Cooled Chiller Configurations Typical Ductwork for Air-Cooled Chillers Page Piping Diagrams GP Series Portable Chillers Appendix GP Series Portable Chillers Appendix GP Series Portable Chillers Appendix GP Series Portable Chillers Appendix GP Series Portable Chillers Appendix GP Series Portable Chillers Appendix GP Series Portable Chillers Appendix GP Series Portable Chillers Appendix GP Series Portable Chillers Appendix GP Series Portable Chillers Appendix GP Series Portable Chillers Appendix
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882.93092.00 specifications

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