Sterling 882.93092.00 specifications Alarms, Optional Communications

Page 34

the to accept the password. The following screen will appear.

Figure 13 - Operator Setpoints Screen

3.Depress to move the cursor to the Leaving Temp line. Use the or button to increment or decrement the value. Depress to accept the value and move the cursor down one line.

4.Adjust the Hi Temp Warning and Hi Temp Fault in the same manner.

5.Depress the button twice to return to the main status screen.

4-6 Alarms

The controller is setup with multiple alarms, most of them configurable using the Supervisor password. Section 4-5 Controller Setpoints gives a list of alarms that the controller is setup to display. The alarms are broken up into two categories – warnings and faults. The warning notifies the user that the parameter has been exceeded and the chiller is allowed to keep operating, but should be monitored to determine the cause of the warning. The fault notifies the user that the parameter has been exceeded and the chiller and pump has been shut down to protect the system.

4-7 Optional Communications

The communications function allows you to monitor and set the parameters by a program prepared and running on a host computer connected to the controller.

When using the communications function, you must add on the unit for RS-485 Modbus communications. The communications function allows you to read/write parameters, do operating instructions, and select the setting level.

GP Series Portable Chillers

Chapter 4: Operation

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Contents GP Series Portable Chillers Shipping Information Table of Contents Operation How to Use This Manual SafetySafety Symbols Used in this Manual Responsibility General Description Functional DescriptionModels Covered in This Manual Chilled Water CircuitMechanical Features Standard FeaturesElectrical Features Controller Features Safety Devices and InterlocksRefrigeration Features Other FeaturesHigh Pressure Cutout Optional FeaturesFlow Switch Remote Start/Stop InterlockMounting Features Optional Pump Amperages Voltage Construction Full Load Amps Uncrating InstallationElectrical Connections Galvanic Corrosion Considerations Process Water ConnectionsBypass Valve Considerations Water Treatment ConsiderationsWater-Cooled Chiller Condensers Condenser ConsiderationsAir-Cooled Chiller Condensers Remote Air-Cooled Chiller Condensers Equivalent Length in Feet for Valves and Fittings Discharge Line Sizing Refrigerant Charge Determination Water Pumps Three-Phase CompressorsChecking Motor Direction Condenser FanWater Reservoir Part Number DescriptionPump Automatic Water Make-Up Option Finishing Setup Setting Up PasswordsInitial Start-Up Page Page Operation Panel Buttons, Indicator Lights, and SwitchesMicroprocessor 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 Lubrication MaintenanceFilter Cleaning Maintaining the CondenserMaintaining the Evaporator Preventative Maintenance ServiceEvaporator Process Piping Y-Strainer Troubleshooting GP Series Portable Chillers TroubleshootingGP Series Portable Chillers Troubleshooting Returned Material Policy Warranty ReturnsAppendix Credit ReturnsParts Department Service DepartmentTechnical Assistance 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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882.93092.00 specifications

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