Sterling 882.93092.00 specifications Refrigerant Charge Determination

Page 19

Refrigerant Charge Determination. The approximate amount of refrigerant charge required by the system varies based on the total length of the refrigerant lines and the size of the chiller. Referring to Figure 5, determine the amount of charge based on the horsepower of the chiller and the amount of charge based on discharge and liquid line sizes and lengths. Add these three numbers together to find the final operating charge. The final operating charge must be verified by running the system and checking the liquid line sight glass.

Figure 5: Refrigerant Charge Determination

Chiller

 

 

Condenser and Chiller Charge (per circuit)

 

 

 

 

Minimum Design Ambient - °F

 

 

Model

60

50

 

40

30

20

10

0

-10

-20

GPRC5

9

9

 

10

11

12

13

13

13

14

GPRC7.5

10

10

 

12

14

15

16

16

17

17

GPRC10

13

13

 

15

17

19

20

21

21

22

GPRC15

18

19

 

22

25

27

29

30

31

32

Line Size

Discharge Line

Liquid Line

OD (inches)

LBS of R-410a

LBS of R-410a

3/8

0.3

3.2

1/2

0.6

6.0

5/8

1.0

9.6

3/4

1.5

14.4

7/8

2.1

20.0

1-1/8

3.7

34.1

Oil Charge Determination. The remote air-cooled portable chillers are factory charged with the amount of oil required without field-installed piping. Additional oil required is dependent on the amount of additional refrigerant added.

Calculate the amount of additional oil required by using the following formula:

Pints of oil (Copeland Ultra 22cc) = lbs of R-410a added for field installed piping / 100.

GP Series Portable Chillers

Chapter 3: Installation

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Contents GP Series Portable Chillers Shipping Information Table of Contents Operation How to Use This Manual SafetySafety Symbols Used in this Manual Responsibility Chilled Water Circuit Functional DescriptionModels Covered in This Manual General DescriptionMechanical Features Standard FeaturesElectrical Features Other Features Safety Devices and InterlocksRefrigeration Features Controller FeaturesRemote Start/Stop Interlock Optional FeaturesFlow Switch High Pressure CutoutMounting Features Optional Pump Amperages Voltage Construction Full Load Amps Uncrating InstallationElectrical Connections Water Treatment Considerations Process Water ConnectionsBypass Valve Considerations Galvanic Corrosion ConsiderationsWater-Cooled Chiller Condensers Condenser ConsiderationsAir-Cooled Chiller Condensers Remote Air-Cooled Chiller Condensers Equivalent Length in Feet for Valves and Fittings Discharge Line Sizing Refrigerant Charge Determination Condenser Fan Three-Phase CompressorsChecking Motor Direction Water PumpsPart 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 Screens GP Series Portable Chillers Operation Access Levels Controller Setpoints Menu Screen Optional Communications AlarmsGP Series Portable Chillers Operation Maintaining the Condenser MaintenanceFilter Cleaning LubricationMaintaining the Evaporator Preventative Maintenance ServiceEvaporator Process Piping Y-Strainer GP Series Portable Chillers Troubleshooting TroubleshootingGP Series Portable Chillers Troubleshooting Credit Returns Warranty ReturnsAppendix Returned Material PolicySales Department Service DepartmentTechnical Assistance Parts DepartmentAir-Cooled Portable Chillers SpecificationsPAC-40 PWC-20 Water-Cooled Portable ChillersPWC-40 Hertz Pump Curves Pump Curves, Flow, and Pressure ConsiderationsCapacity liter/min ALL 50 HzCalculating Chiller Nominal Flow and Pressure to Process Remote Air-Cooled Chiller Configurations Typical Ductwork for Air-Cooled Chillers Page GP Series Portable Chillers Appendix 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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