Sterling 882.93092.01 manual Optional Features, Flow Switch, Remote Start/Stop Interlock

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Flow Switch

The thermal dispersion flow switch cutout device, mounted in the process piping, shuts down the chiller if it senses that the water/glycol flow rate through the evaporator has dropped below an acceptable level. The flow switch opens the control circuit and shuts down the pump and the chiller.

Remote Start/Stop Interlock

An additional contact is provided to allow the remote starting or stopping of the chiller. To use this feature install a switch or dry contact interlock connected in series between terminals 4 and 23. Refer to the electrical schematic supplied in the control enclosure. Once the wiring is complete the controller will need to be reconfigured in the supervisor settings.

2-5 Optional Features

Options marked with “*” indicate options that can be factory installed or retrofitted in the field.

Automatic Water Make-Up*.Not available on chillers less reservoir tank. This option includes an electric water solenoid valve, and the necessary internal piping to connect the chiller to a make-up water source. The controller uses the standard tank level pressure transducer to determine when to fill the tank. See Appendix for typical piping diagrams.

Caution! Customer piping must provide backflow protection and venting of tank to atmosphere to prevent over-pressurization of the reservoir tank (not needed for open tank). See Section 7-7 for flow schematics.

Process Water Side-stream Filter*. Not available on chillers less pump and reservoir tank. This option includes a 50 micron filter, flow indicator, ball valve for throttling water flow, and the necessary piping to provide constant filtering of the process water at about one gallon per minute (1 gpm/3.8lpm).

General Fault Indicator Audible/Visual Alarm*. This option includes a 100 dB audible alarm horn/ visual alarm strobe and silence button with provisions for customer wiring indication interlock. The alarm signals anytime that a fault is recognized during the operation of the chiller.

Communications Options*. This option provides the capability for the unit’s controller to communicate with an external device using a variety of serial communication protocols. Currently the unit can communicate over RS-485 Modbus RTU, BACNet, LONWorks, Ethernet Modbus.

High Pressure Fans. Provides either 0.3” WC (75 Pa) or 1.0”WC (250 Pa) of external static pressure on fan discharge. High-pressure fans are necessary and must be included in chiller installations where exiting air exhausts through ductwork.

The 0.3” WC (75 Pa) static fan can be retrofitted without sheet metal modification, but will require changing out fan housing, fan blades, fan motors and electrical components.

Variable Speed Fan – GPAC20-50.Reduces the speed of the fan based on refrigerant pressure and system load, allowing the chiller to operate in ambient temperatures below 75ºF (24ºC). This option will also reduce fan noise in lower ambient temperatures and low loads.

GP Series Portable Chillers

Chapter 2: Functional Description

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Contents GP Series Portable Chillers Shipping Information Table of Contents Chapter Troubleshooting Safety Symbols Used in this Manual SafetyHow to Use 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 Remote Start/Stop Interlock Optional FeaturesFlow Switch Mounting Features Electrical Connections InstallationUncrating 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 Microprocessor Controller Panel Buttons, Indicator Lights, and SwitchesOperation 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 CondenserEvaporator Process Piping Y-Strainer Preventative Maintenance ServiceMaintaining the Evaporator 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 Technical Assistance AppendixReturned Material Policy Contract Department Service DepartmentSales 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.

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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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