Sterling 882.93092.00 Checking Motor Direction, Three-Phase Compressors, Water Pumps

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3-8 Checking Motor Direction

All of our portable chillers have their motor rotations properly phased at the factory. If compressors, pumps, or fans are running in reverse rotation, disconnect and lock out the power source and reverse any two power leads into the chiller disconnect switch.

Caution! Do not switch leads at the motors, motor starters, or contactors.

Three-Phase Compressors

Scroll compressors are directionally-dependent and compress in one rotational direction. Reversing rotation direction results in an elevated sound level and a substantially-reduced current draw.

Water Pumps

Correct pump rotation is indicated by a positive pressure of 20 to 40 psi on the pump pressure gauge. Pump rotation should be clockwise when viewed from the motor end. For chillers with optional pumps, check the appropriate pump curve in the Appendix.

Caution! Do not run pump dry. Doing so will result in seal damage.

Condenser Fan

Air should be drawn through the condenser and discharged vertically from the chiller.

GP Series Portable Chillers

Chapter 3: Installation

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Contents GP Series Portable Chillers Shipping Information Table of Contents Appendix Safety Symbols Used in this Manual SafetyHow to Use This Manual Responsibility Chilled Water Circuit Functional DescriptionModels Covered in This Manual General DescriptionElectrical Features Standard FeaturesMechanical 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 Electrical Connections InstallationUncrating Water Treatment Considerations Process Water ConnectionsBypass Valve Considerations Galvanic Corrosion ConsiderationsRemote Air-Cooled Chiller Condensers Condenser ConsiderationsWater-Cooled Chiller Condensers 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 Condenser Fan Three-Phase CompressorsChecking Motor Direction Water PumpsPart 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 ScreensPage Access Levels Controller Setpoints Optional Communications AlarmsPage GP Series Portable Chillers Operation Maintaining the Condenser MaintenanceFilter Cleaning LubricationEvaporator Process Piping Y-Strainer Preventative Maintenance ServiceMaintaining the Evaporator GP Series Portable Chillers Troubleshooting TroubleshootingGP Series Portable Chillers Troubleshooting Credit Returns Warranty ReturnsAppendix Returned Material PolicySales Department Service DepartmentTechnical Assistance Parts DepartmentPAC-30 SpecificationsAir-Cooled Portable Chillers PAC-20PAC-50 PAC-40GPAC-70 TON GPAC-140 GPAC-105GPAC-210 GPAC-175PWC-30 Water-Cooled Portable ChillersPWC-20 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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