SterlingTEK A0551797 manual Chilled Water Circuit, Refrigeration Circuit, Freezestat Control

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4-5 Chilled Water Circuit

If your central chilling station is equipped with the optional integral pump tank, make the process cooling water supply connection at the P1 manifold at the left side of the pump tank at the exposed connection. Bring the process cooling water return connection to the Hot well of the tank on the right side at the flanged connection.

Warm coolant (water and ethylene glycol mixture) returns from the process to the tank, then gets pumped through the evaporator where it is cooled. The coolant flows to the process and returns to repeat the cycle.

4-6 Refrigeration Circuit

∙SSC Series chilling station air- and water-cooled unit refrigeration cycles differ only in the way the compressed gas is condensed to a liquid.

∙Liquid refrigerant from the condenser passes through a shut-off valve into a filter/dryer.

∙The refrigerant then passes through the sight glass and solenoid valves into the thermal expansion valve which regulates flow; the valve lowers pressure and boiling point. Heat from the fluid causes the refrigerant to boil off into a vapor.

∙The refrigerant vapor flows through the suction line back into the compressor.

∙The refrigerant gives up heat as it re-condenses to a liquid in the condenser.

4-7 Freezestat Control

The freezestat shuts down the compressor if the chilled water temperature approaches the freezing point. The chilled water pump on the system will continue to run. It is factory-set at 40°F (4ºC) or 10°F (6ºC) below the rated capacity operating temperature of 50°F (10ºC).

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SSC Series Central Chilling Stations

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Contents SSC Series Central Chilling Stations SSC Series Central Chilling Stations Safety Considerations Wear Safety Glasses and Work GlovesTable of Contents Startup Checklists Getting Started on the SSC Series Advanced TouchscreenCharts and Figures Introduction Necessary DocumentsStandard Features Models CoveredStandard Features on Remote Condensers Available OptionsModel Number Nomeclature Typical Two-Circuit 60-100 Ton Water Cooled Chiller Model SSCW-xxxCooling Capacity tons @ 50F 10 C LWT 73.1 81.4 Typical Two-Circuit 60-100 Ton Remote Air Cooled Chiller Model SSCR-xxxSscr Series Remote Condenser Models Unpacking and Inspection Event of Shipping DamagesIf the Shipment is Not Correct If the Shipment is Not CompleteReturns Uncrating Your New Chiller SSC Series Central Chilling Stations Installation Location Considerations 3InstallationMaking Electrical Connections SSC Series Central Chilling Stations Making Process Water Connections Piping ConsiderationsAll Models Making Tank Piping Connections From ProcessWater Connection Sizing Considerations Galvanic Corrosion ConsiderationsWater Treatment Considerations Making Water-Cooled Condenser ConnectionsInstalling the Remote Air-Cooled Condenser Condenser Water Checking Motor Direction CompressorSSC Series Central Chilling Stations Alarms StagingLead-Lag Compressors Lead-Lag PumpsRefrigeration Circuit Chilled Water CircuitFreezestat Control Volume Freezing Protection CurveHigh Pressure Cutout Flow SwitchLow Pressure Cutout Control Nipple Control ProbeChilled Water Manifold Condenser Water ManifoldSSC Series Central Chilling Stations Startup Checklists Water-Cooled SSC Series Startup ChecklistSSC Series Central Chilling Stations Remote Air-Cooled SSC Series Startup Checklist Water-Cooled SSC Series StartupSSC Series Central Chilling Stations Remote Air-Cooled SSC Series Startup Determining Flow Rate ShutdownSSC Series Central Chilling Stations SSC Series Central Chilling Stations Indicator Lights and Control Switches MMI Graphic Panel DevicesSSC Series Central Chilling Stations Touchscreen Interface Using the StandardTouchscreen Interface Introduction MMI Using the SSC Series Standard Touchscreen Interface SSC Series Standard Control PanelMain Menu Screen Viewing Compressor Status Viewing and Operating Chiller CompressorsCompressor Status Screen Chiller Configuration Screen Operating the chiller compressorsCompressor Enable Screen Compressor Lead/Lag ScreenViewing Compressor Run Times Compressor Run Time Display ScreenViewing Chiller Pump Status Viewing and Operating Chiller PumpsPump Status Screen Pump Enables Screen Operating Chiller PumpsPump Lead/Lag Screen Viewing Pump Run TimesPump Run Time Display Screen Viewing Active Alarms and Handling Alarm Conditions Alarm Condition ScreenOr Death Viewing and Setting System Temperatures Setting System TemperaturesSSC Series Central Chilling Stations Using the Advanced Using the SSC Series Advanced Touchscreen Interface Main Menu Screen Viewing and Operating Chiller Compressors Chiller Status Screen Operating the chiller compressors Viewing Compressor Run Times Viewing and Operating Chiller Pumps Viewing Chiller Pump Status Operating Chiller Pumps Hourmeters Pump Run Time screen displays Viewing Active Alarms and Handling Alarm Conditions Alarm Condition Screen Or Death System Status Screen Temperature Input Display Screen Condenser Maintenance LubricationEvaporator Maintenance Pump Motor SealMakeup Valve Recommended Pump Tank Spare PartsPreventive Maintenance Service SSC Series Central Chilling Stations 10Troubleshooting Problem Possible Cause SolutionAllow time to cool and reset Verify proper rotation if Service Notes Index Water Treatment Service Notes Service Notes Service Notes Parts Department Sterling Th Street New Berlin, WI 262 641-8610 ∙ Fax 262