Sterling 882.93092.00 specifications Standard Features, Mechanical Features, Electrical Features

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The refrigerant is compressed in the compressor and flows through the discharge line as a gas to the condenser. There it gives up its heat as it condenses to a liquid in the condenser.

An electronic hot gas bypass valve is used to control cooling capacity during intermittent or partial load conditions. This feature contributes substantially to chiller longevity by eliminating excessive cycling of the compressor and providing close temperature control.

2-3 Standard Features

Mechanical Features

Compressor. Hermetic scroll compressors.

Evaporator. Stainless steel copper brazed plate evaporators.

Air-Cooled Condenser. Aluminum fin/ tube with washable filters, package unit only (option

on remotes).

Water-Cooled Condenser. Tube-in-tube condensers. All come with electronic cooling water regulating valves. 1 in. NPT valves for GPWC20 & 30; 1.25 in. NPT valves for GPWC40; and 1.50 in. NPT valves for GPWC50.

Remote Air-Cooled Condenser. Aluminum fin/tube with low ambient control down to – 20ºF (-29ºC) via a variable-speed primary fan.

Reservoir. 5 hp and 7.5 hp models use a 20 gallon polyethylene tank. 10 hp and 15 hp models use a 40 gallon polyethylene tank.

Piping. Non-ferrous piping

Pump. TEFC motors (Optional 10 HP is ODP only)—horizontally mounted stamped stainless steel construction.

Other Mechanical Features

•Low process water thermal flow switch

•NEMA-rated fan motor(s) on air-cooled models

•Galvanized structural steel frame, painted cabinetry, with 4” (locking) swivel casters

•Internal process water bypass valve for system protection only

•Fully insulated refrigeration and process water piping

•20 mesh Y strainer on process water piping into the evaporator

•Tank level indication

•Pump pressure indication

Electrical Features

•Fully accessible NEMA 12-style electrical control enclosure

•Single-point power and ground connection

•Non-fused disconnect switch, lockable

•Branch circuit fusing

•208-230/3/60, 460/3/60, 575/3/60 volt; 400/3/50 volt

GP Series Portable Chillers

Chapter 2: Functional Description

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Contents GP Series Portable Chillers Shipping Information Table of Contents Operation Safety Symbols Used in this Manual SafetyHow to Use This Manual Responsibility Functional Description Models Covered in This ManualGeneral Description Chilled Water CircuitElectrical Features Standard FeaturesMechanical Features Safety Devices and Interlocks Refrigeration FeaturesController Features Other FeaturesOptional Features Flow SwitchHigh Pressure Cutout Remote Start/Stop InterlockMounting Features Optional Pump Amperages Voltage Construction Full Load Amps Electrical Connections InstallationUncrating Process Water Connections Bypass Valve ConsiderationsGalvanic 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 Three-Phase Compressors Checking Motor DirectionWater Pumps Condenser FanWater Reservoir Part Number DescriptionPump 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 Alarms Optional CommunicationsGP Series Portable Chillers Operation Maintenance Filter CleaningLubrication Maintaining the CondenserEvaporator Process Piping Y-Strainer Preventative Maintenance ServiceMaintaining the Evaporator Troubleshooting GP Series Portable Chillers TroubleshootingGP Series Portable Chillers Troubleshooting Warranty Returns AppendixReturned Material Policy Credit ReturnsService Department Technical AssistanceParts Department Sales DepartmentSpecifications Air-Cooled Portable ChillersPAC-40 Water-Cooled Portable Chillers PWC-20PWC-40 Pump Curves, Flow, and Pressure Considerations Hertz Pump CurvesALL 50 Hz Capacity liter/minCalculating 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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