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

Models: 882.93092.00

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

Contents

ECN No Copyright 2010 All rights reserved GP Series Portable ChillersPart Number Bulletin Number SC2-620.2 Effective 1/12/2010 We are committed to a continuing program of product improvementIf the Shipment is Not Complete Shipping InformationUnpacking and Inspection In the Event of Shipping DamageFlow Switch Table of ContentsCHAPTER 1 SAFETY CHAPTER 3 INSTALLATIONCHAPTER 7 APPENDIX CHAPTER 5 MAINTENANCECHAPTER 6 TROUBLESHOOTING Safety Symbols Used in this Manual Chapter 1 Safety1-1 How to Use This Manual SYSTEM. This must be performed by a qualified service technician only 1-2 Warnings and Precautions9 Wear SAFETY GLASSES and WORK GLOVES 9 Use care when LOADING, UNLOADING, RIGGING, or MOVING this equipmentChilled Water Circuit Chapter 2 Functional Description2-1 Models Covered in This Manual 2-2 General DescriptionElectrical Features 2-3 Standard FeaturesMechanical Features Other Mechanical FeaturesOther Features 2-4 Safety Devices and InterlocksRefrigeration Features Controller FeaturesHigh Pressure Cutout 2-5 Optional FeaturesLow Pressure Cutout no switch but done through the transducer Flow SwitchMounting Features Full Load Amps Figure 1 Optional Pump AmperagesVoltage Construction3-2 Electrical Connections Chapter 3 Installation3-1 Uncrating 3-6 Water Treatment Considerations 3-3 Process Water Connections3-4 Bypass Valve Considerations 3-5 Galvanic Corrosion ConsiderationsRemote Air-Cooled Chiller Condensers 3-7 Condenser ConsiderationsWater-Cooled Chiller Condensers Air-Cooled Chiller CondensersNote Piping should be type “L” or type “K” refrigerant grade copper tubing only. Proper sizing and installation has a significant effect on system performance, reliability, and safety 17 of Chapter 3 InstallationGP Series Portable Chillers Angle Figure 2 Equivalent Length in Feet for Valves and FittingsFigure 3 Liquid Line Sizing Line Size20 TON CIRCUIT 10 TON CIRCUITTotal Equiv Length Ft50 TON CIRCUIT 30 TON CIRCUITTotal Equiv Length Ft21 of Figure 4 Discharge Line SizingChapter 3 Installation GP Series Portable ChillersFigure 5 Refrigerant Charge Determination Condenser Fan Three-Phase Compressors3-8 Checking Motor Direction Water PumpsDescription 3-9 Water ReservoirPart Number Example 45F set point minus 20F = 25F Figure 6 Ethylene Glycol and Propylene Glycol CurvesFrom Figure 28, 25F equates to 10% by volume of glycol required pump3-11 Initial Start-Up 3-12 Finishing Setup Setting Up Passwords3-10 Automatic Water Make-Up Option Chapter 3 Installation To set password protections1. Press the button to access the menu screen or the following screen for the Supervisor Password28 of 6. Press to accept the Password and move to the next lineChapter 3 Installation GP Series Portable ChillersFigure 7 - Controller Display 4-1 Panel Buttons, Indicator Lights, and SwitchesChapter 4 Operation Microprocessor ControllerFigure 9 - Menu Screen 4-2 Initial Start-upFigure 8 - Main Status Screen Figure 11 - Main Status Screen 4-3 Status ScreensFigure 10 - Operator Setpoints Screen 32 of GP Series Portable ChillersChapter 4 Operation 4-4 Access Levels Figure 12 - Menu Screen Controller SetpointsFigure 13 - Operator Setpoints Screen 4-6 Alarms4-7 Optional Communications 36 of GP Series Portable ChillersChapter 4 Operation 37 of GP Series Portable ChillersChapter 4 Operation 5-3 Maintaining the Condenser Chapter 5 Maintenance5-2 Filter Cleaning 5-1 Lubrication5-5 Evaporator Process Piping Y-Strainer 5-6 Preventative Maintenance Service5-4 Maintaining the Evaporator Chapter 6 Troubleshooting 41 of Chapter 6 TroubleshootingGP Series Portable Chillers Credit Returns Warranty ReturnsChapter 7 Appendix 7-1 Returned Material PolicySales Department Service Department7-2 Technical Assistance Parts DepartmentG-PAC-30 7-3 SpecificationsAir-Cooled Portable Chillers G-PAC-20G-PAC-40 GP Series Portable ChillersChapter 7 Appendix 45 ofGPAC-70 GP Series Portable ChillersChapter 7 Appendix 46 ofGPAC-105 GP Series Portable ChillersChapter 7 Appendix 47 ofGPAC-175 GP Series Portable ChillersChapter 7 Appendix 48 ofG-PWC-30 Water-Cooled Portable ChillersG-PWC-20 G-PWC-40 GP Series Portable ChillersChapter 7 Appendix 50 ofGPWC-70 GP Series Portable ChillersChapter 7 Appendix 51 ofGPWC-105 GP Series Portable ChillersChapter 7 Appendix 52 ofGPWC-175 GP Series Portable ChillersChapter 7 Appendix 53 ofHead ft 7-4 Pump Curves, Flow, and Pressure Considerations5-15 ALL 60 Hz 60 Hertz Pump CurvesCapacity Gal/min 70-210 ALL 60 HzHead ft Head m 5-15 ALL 50 Hz50 Hertz Pump Curves ACS CHILLER PUMPSCapacity liter/min 20-50 ALL 50 HzACS CHILLER PUMPS Head mPure Water at 40F Calculating Chiller Nominal Flow and Pressure to Process59 of 7-5 Remote Air-Cooled Chiller ConfigurationsGP Series Portable Chillers Chapter 7 Appendix7-6 Typical Ductwork for Air-Cooled Chillers 61 of GP Series Portable ChillersChapter 7 Appendix 62 of 7-7 Piping DiagramsGP Series Portable Chillers Chapter 7 Appendix63 of GP Series Portable ChillersChapter 7 Appendix 64 of GP Series Portable ChillersChapter 7 Appendix 65 of GP Series Portable ChillersChapter 7 Appendix 66 of GP Series Portable ChillersChapter 7 Appendix 67 of GP Series Portable ChillersChapter 7 Appendix 68 of GP Series Portable ChillersChapter 7 Appendix 69 of GP Series Portable ChillersChapter 7 Appendix 70 of GP Series Portable ChillersChapter 7 Appendix 71 of GP Series Portable ChillersChapter 7 Appendix 72 of GP Series Portable ChillersChapter 7 Appendix 73 of GP Series Portable ChillersChapter 7 Appendix