Sterling 882.93092.01 manual Galvanic Corrosion Considerations, Water Treatment Considerations

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3-5 Galvanic Corrosion Considerations

The materials used in the water circuit piping of these chillers are non-ferrous and react electro-chemically with ferrous metallic materials. Some water has dissolved minerals that greatly accelerate the reaction between dissimilar metals.

PVC or non-ferrous piping is recommended to reduce galvanic action. If iron piping must be used, use dielectric unions at the chiller, and water treatment is required.

Note: The use of galvanized piping is discouraged because the rough inside surface promotes debris to stick and eventually block the flow of the process fluid..

3-6 Water Treatment Considerations

Water treatment is an integral part of the system. In some locations, water may cause large deposits of scale, erosion, algae, and/or corrosion.

Note: The use of poor quality water may result in inefficient operation, heat exchanger damage, and pump seal damage. Consult a qualified water treatment specialist to determine what type of treatment is needed.

3-7 Condenser Considerations

Water-Cooled Chiller Condensers

Water-cooled portable chillers can use city water or tower water as a cooling medium. Make sure that all external piping and connections supplying and discharging water to and from the condenser are full size.

You will make two connections to the water-cooled condenser:

Condenser Water In. The condenser water supply is labeled “Condenser Water In.” It is the inlet for city or tower water. For the GPWC20-50, this connection is located near the bottom of the chiller. For all other sizes this connection is located near the top of the chiller.

Make sure that water is supplied at a maximum temperature of 85ºF (29ºC) and a minimum pressure of 25 psi.

Caution! The electronic water-regulating valves pressure setpoint is set at the factory. Only a qualified refrigeration technician should adjust the pressure setting. Please contact our service group at 800-423-3183 to schedule an appointment.

Normal HFC-410a refrigerant condensing pressure is 342 psi (2,360 kPa), with 85ºF (27ºC) water at 25 psi entering condenser water pressure

Condenser Water Out. Condenser water return is labeled “Condenser Water Out.” It is the outlet for water after it has passed through the condenser. For the GPWC20-50, this connection is located near the bottom of the chiller. For all other sizes this connection is located near the top of the chiller.

It is connected to the tower water return line or to a sewer or other approved discharge receiver. A water-regulating valve is a standard feature in the condenser water out line.

GP Series Portable Chillers

Chapter 3: Installation

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Contents GP Series Portable Chillers Shipping Information Table of Contents Chapter Troubleshooting Safety How to Use This ManualSafety Symbols Used in this Manual  Wear Safety Glasses and Work Gloves ResponsibilityGeneral Description Functional DescriptionModels Covered in This Manual Typical ApplicationsChilled Water Circuit Refrigeration Circuit System ControlStandard Features Mechanical FeaturesElectrical Features Refrigeration FeaturesOther Features Safety Devices and InterlocksController Features Crankcase HeaterHigh Pressure Cutout Optional Features Flow SwitchRemote Start/Stop Interlock Mounting Features Installation UncratingElectrical Connections Process Water Connections Bypass Valve ConsiderationsCondenser Considerations Galvanic Corrosion ConsiderationsWater Treatment Considerations Water-Cooled Chiller CondensersTypical GP20-50 Water Cooled Condenser Connections Air-Cooled Chiller CondensersRemote Air-Cooled Chiller Condensers Towards the condenser GPRC-40 GPRC-105 Discharge Line Sizing Refrigerant Charge Determination Remote Condenser Configurations Water Pumps Three-Phase CompressorsChecking Motor Direction Condenser FanWater Reservoir Part Number DescriptionSuggested Overhead Piping Configuration Pump Automatic Water Make-Up Option Initial Start-UpPage Finishing Setup Setting Up Passwords Supervisor Password to complete the security setup Panel Buttons, Indicator Lights, and Switches OperationMicroprocessor Controller Main Status Screen Status Screens Operator Setpoints ScreenMain Chiller Status Screen GP Series Portable Chillers Operation Page Access Levels Controller SetpointsGP Series Portable Chillers Operation Menu Screen Operator Setpoints Screen Configuration Settings These configurations are described belowWEB Alarms Optional CommunicationsLubrication MaintenanceFilter Cleaning Maintaining the CondenserPreventative Maintenance Service Maintaining the EvaporatorEvaporator Process Piping Y-Strainer Troubleshooting Identifying the Cause of a ProblemGP Series Portable Chillers Troubleshooting SC/W System fault GP Series Portable Chillers Troubleshooting Non-Controller Related Issues Problem Possible cause SolutionGP Series Portable Chillers Troubleshooting GP Series Portable Chillers Troubleshooting Appendix Returned Material PolicyTechnical Assistance Service Department Sales DepartmentContract Department Specifications Air-Cooled Portable ChillersGPAC-40 GPAC-70 GPAC-105 GPAC-175 Water-Cooled Portable Chillers GPWC-20GPWC-40 GPWC-70 GPWC-105 GPWC-175 Pump Curves, Flow, and Pressure Considerations Hertz Pump CurvesALL 60 Hz ALL 50 Hz ALL 50 Hz Calculating Chiller Nominal Flow and Pressure to Process Remote Air-Cooled Chiller Configurations Double Riser Detail Typical Ductwork for Air-Cooled Chillers Water column = Pascal 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

882.93092.01 specifications

The Sterling 882.93092.01 is an impressive timepiece that exemplifies the perfect blend of artistry and precision engineering. This elegant watch is a testament to the craftsmanship that defines the Sterling brand, making it a sought-after choice for both watch aficionados and casual wearers alike.

One of the main features of the Sterling 882.93092.01 is its exceptional movement technology. This watch is powered by a reliable automatic movement, ensuring accurate timekeeping without the need for battery replacements. The self-winding mechanism harnesses the natural motion of the wearer's wrist, providing a seamless and hassle-free experience.

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Another notable aspect is the watch's water resistance. The Sterling 882.93092.01 is rated for water resistance, making it suitable for everyday wear, including light swimming and exposure to splashes. This feature enhances the watch’s practicality, allowing it to withstand the rigors of daily life without compromising its integrity.

Finally, the bracelet of the Sterling 882.93092.01 is crafted with comfort and style in mind. It features an adjustable clasp that allows for a customized fit, ensuring that the watch remains secure on the wrist. The combination of high-quality materials and impeccable design makes the bracelet an integral part of the overall charm of the watch.

Overall, the Sterling 882.93092.01 is more than just a timekeeping device; it is a statement piece that showcases exceptional design, reliable technology, and outstanding craftsmanship. Whether worn at special occasions or in everyday scenarios, this watch is bound to impress and stand the test of time.
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