Sterling 882.93092.00 specifications Water Reservoir, Part Number Description

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3-9 Water Reservoir

All portable chillers shipped during the fall, winter, or spring, or those units that are shipped from stock are flushed at the factory with a water/ethylene glycol solution to prevent piping components prone to retaining water from freezing. During startup and when additional solution is required, refer to the ethylene glycol and propylene glycol curves in Figure 6 on page 20 Add a pre-mixed solution of industrial quality (not automotive) ethylene glycol or propylene glycol and water to provide freeze protection to a temperature 20ºF (11ºC) below the normal chiller operating temperature set point.

Glycol and/or water, with an inhibitor, should be used to protect the materials (copper, steel, stainless steel, and bronze) in the system from corrosion. If you intend to use straight water, we strongly advise a minimum leaving water temperature of 45ºF (7ºC) or contact the service department.

The following glycol products are available:

Part Number

Description

 

 

A0541358

Ethylene glycol, 5 gallons (18.9 liters)

 

 

A0539637

Ethylene glycol, 55 gallons (208.2 liters)

 

 

A0542990

Propylene glycol, 5 gallons (18.9 liters)

 

 

A0542991

Propylene glycol, 55 gallons (208.2 liters)

 

 

Caution! Do not connect make-up water directly to the chilled water reservoir unless you have an approved automatic water make-up system installed.

Caution! Do not pressurize tank. Supply and return connections must be trapped and vented to allow vertical risers to drain into tank. Do not overfill system. Allow enough free space in tank for vertical piping to drain.

If your application has chilled water or process piping above the chiller, trap and vent the supply and return lines to allow vertical piping to drain into tank.

Note: In applications where the process or process piping is above the reservoir, take steps to prevent over pressurization of the reservoir. This condition can occur on system shutdown when the water in the system drains into the reservoir. To prevent this, a vacuum breaker should be installed at the high point of the “To Process” and “From Process” lines.

GP Series Portable Chillers

Chapter 3: Installation

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Contents GP Series Portable Chillers Shipping Information Table of Contents Appendix 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 CondensersPage Page Equivalent Length in Feet for Valves and Fittings Total Equiv GP Series Portable Chillers Installation 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 Status Screens Operator Setpoints ScreenPage Access Levels Controller Setpoints Alarms Optional CommunicationsPage GP 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-20 PAC-30PAC-40 PAC-50GPAC-70 GPAC-105 TON GPAC-140GPAC-175 GPAC-210Water-Cooled Portable Chillers PWC-20PWC-30 PWC-40 PWC-50GPWC-70 GPWC-105 GPWC-140GPWC-175 GPWC-210Pump Curves, Flow, and Pressure Considerations Hertz Pump CurvesModel GP70 GP90 ALL 50 Hz Capacity liter/minACS Chiller Pumps Pure Water at 40F GPM DP PSIRemote 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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