Sterling 882.93092.00 Maintenance, Lubrication, Filter Cleaning, Maintaining the Condenser

Page 36

Chapter 5: Maintenance

5-1 Lubrication

Grease all fan motors, and pump motors that do not have permanently sealed bearings. Be sure to use an all-purpose industrial grease with a temperature reference of 185˚ F (85˚ C). Remove the grease relief plug (motors only) before adding grease, add grease until a small amount pours out, and replace the plug when finished.

Caution! Failure to remove the grease relief plug will result in dislodging the bearing grease seal, eventually causing bearing failure.

Refrigeration compressors are hermetically sealed and no lubrication is required.

5-2 Filter Cleaning

Air filter cleaning is important to keep your air-cooled portable chiller operating at peak efficiency and capacity. Clean the filters whenever they appear dirty, or at regularly scheduled intervals.

1.Turn the chiller off.

2.Slide the filter rod to release it from the frame at the top and bottom.

3.Wash down the filter with clean water (preferably with a garden hose), directing the flow of water opposite the direction of airflow. If dirt is heavy, use a mild detergent and rinse well. Allow the filter to dry completely before replacing it on the chiller.

Note: Keep a spare air filter set on hand. Install and use it while cleaning).

Caution! Do not use compressed air to blow off a dirty filter. It will not clean very well, and the filter could be damaged. Never run the chiller without properly installed filters.

5-3 Maintaining the Condenser

Dirty condenser heat exchange surfaces reduce system capacity and efficiency.

Air- and Remote Air-Cooled Chillers

Brush or vacuum light dirt accumulations off the aluminum condenser fins. Avoid bending or damaging them. Heavy dirt accumulations on the fins may require professional cleaning.

Water-Cooled Chillers

Proper water treatment will greatly reduce cleaning intervals.

Coaxial Condensers (Standard). Remove dirt and slime in the condenser tube water side by reverse-circulating with a mild detergent and water solution. Remove mineral deposits by reverse circulating Liquid Inhibited Acid De-Scaling Solution (Part No. A0502600) through the water side of the condenser. Follow the directions on the container.

Shell & Tube Condensers (Optional). Remove dirt and slime in the condenser tube water side by cleaning with a nylon tube brush. Remove mineral deposits by reverse circulating Liquid Inhibited Acid De-Scaling Solution (Part No. A0502600) through the tube water side of the condenser. Follow the directions on the container.

The refrigerant side is sealed and requires no routine maintenance.

GP Series Portable Chillers

Chapter 5: Maintenance

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Contents GP Series Portable Chillers Shipping Information Table of Contents Operation Safety How to Use This ManualSafety Symbols Used in this Manual Responsibility Functional Description Models Covered in This ManualGeneral Description Chilled Water CircuitStandard Features Mechanical FeaturesElectrical 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 Installation UncratingElectrical Connections Process Water Connections Bypass Valve ConsiderationsGalvanic Corrosion Considerations Water Treatment ConsiderationsCondenser Considerations Water-Cooled Chiller CondensersAir-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 Finishing Setup Setting Up Passwords Automatic Water Make-Up OptionInitial Start-Up Page Page Panel Buttons, Indicator Lights, and Switches OperationMicroprocessor Controller 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 CondenserPreventative Maintenance Service Maintaining the EvaporatorEvaporator Process Piping Y-Strainer 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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