Sterling 882.93092.00 specifications Equivalent Length in Feet for Valves and Fittings

Page 17

leaving water temperature range is also required. See Figure 2 on page 17 for lengths of refrigerant valves and fittings.

Liquid Line Sizing. The liquid line should be sized as small as possible while maintaining acceptable pressure drop to minimize the refrigerant charge. Liquid line risers must not exceed 15 feet from the base of the air-cooled condenser. Horizontal runs do not require a pitch. Insulation is not required unless the line is installed in a high ambient area, i.e., boiler room. Install a liquid line-charging valve to facilitate refrigerant charging. See Figure 3 on page 17 for sizing information. See Figure 5 on page 19 for charge determination.

Discharge Line Sizing. For horizontal runs, the discharge line should be pitched downward, in the direction of flow, at a rate of 1/2” for every 10 feet. This will allow oil to flow towards the condenser. Discharge line sizing is based on the velocity required for sufficient oil return back to the compressor. See Figure 4 on page 18 for discharge line sizing.

Figure 2: Equivalent Length in Feet for Valves and Fittings

Line Size

Angle

Short

Long

OD (inches)

Valve

Radius EL

Radius EL

3/8

24

4

2.8

1/2

24

4.7

3.2

5/8

25

5.7

3.9

3/4

25

6.5

4.5

7/8

28

7.8

5.3

1-1/8

29

2.7

1.9

1-3/8

33

3.2

2.2

1-5/8

34

3.8

2.6

2-1/8

39

5.2

3.4

2-5/8

44

6.5

4.2

Figure 3: Liquid Line Sizing

5 TON CIRCUIT

 

 

Liquid Line Size (OD")

 

Total Equiv.

Horizontal

Upflow

Upflow

Upflow

or

Length (Ft)

Downflow

1-5 Ft

6-10 Ft

11-15 Ft

25

1/2

1/2

1/2

1/2

50

1/2

1/2

1/2

1/2

75

1/2

1/2

1/2

1/2

100

1/2

1/2

1/2

5/8

125

1/2

1/2

1/2

5/8

150

1/2

1/2

5/8

5/8

175

1/2

5/8

5/8

5/8

200

1/2

5/8

5/8

5/8

225

1/2

5/8

5/8

5/8

250

5/8

5/8

5/8

5/8

275

5/8

5/8

5/8

5/8

300

5/8

5/8

5/8

5/8

7.5 TON CIRCUIT

 

 

Liquid Line Size (OD")

 

Total Equiv.

Horizontal

Upflow

Upflow

Upflow

or

Length (Ft)

Downflow

1-5 Ft

6-10 Ft

11-15 Ft

25

5/8

5/8

5/8

5/8

50

5/8

5/8

5/8

5/8

75

5/8

5/8

5/8

5/8

100

5/8

5/8

5/8

5/8

125

5/8

5/8

5/8

5/8

150

5/8

5/8

5/8

5/8

175

5/8

5/8

5/8

3/4

200

5/8

5/8

5/8

3/4

225

5/8

5/8

5/8

3/4

250

5/8

5/8

3/4

3/4

275

5/8

5/8

3/4

3/4

300

5/8

5/8

3/4

3/4

GP Series Portable Chillers

Chapter 3: Installation

17 of 64

Page 16 Page 18
Image 17
Page 16 Page 18
Contents GP Series Portable Chillers Shipping Information Table of Contents Operation Safety Symbols Used in this Manual SafetyHow to Use This Manual Responsibility Models Covered in This Manual Functional DescriptionGeneral Description Chilled Water CircuitElectrical Features Standard FeaturesMechanical 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 Electrical Connections InstallationUncrating Bypass Valve Considerations Process Water ConnectionsGalvanic Corrosion Considerations Water Treatment ConsiderationsAir-Cooled Chiller Condensers Condenser ConsiderationsWater-Cooled Chiller Condensers Remote Air-Cooled Chiller Condensers Equivalent Length in Feet for Valves and Fittings Discharge Line Sizing Refrigerant Charge Determination Checking Motor Direction Three-Phase CompressorsWater Pumps Condenser FanPart Number Description Water ReservoirPump Initial Start-Up Finishing Setup Setting Up PasswordsAutomatic Water Make-Up Option Page Page Microprocessor Controller Panel Buttons, Indicator Lights, and SwitchesOperation 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 Filter Cleaning MaintenanceLubrication Maintaining the CondenserEvaporator Process Piping Y-Strainer Preventative Maintenance ServiceMaintaining the Evaporator 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-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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