Sterling SCW Series installation manual Evaporator Maintenance, Pump Motor Seal, Makeup Valve

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9-3 Evaporator Maintenance

The evaporator(s) may be accessed for back-flushing by removal of the 2” plug (approx. 51 mm) in the return control nipple and the flow switch in the supply control nipple. If the suggested piping recommendations have been followed, one circuit of a multiple circuit chiller may be back-flushed without shutting down the entire system. Check Y-strainer for any clogging.

9-4 Pump Motor Seal

Pump seals require water for lubrication, so the pump(s) must never be run dry. Always fill the tank before attempting to operate the pump(s). Seal failures usually follow a period of dry operation of the pump.

9-5 Makeup Valve

Periodically inspect the water makeup valve assembly for proper operation. If the valve no longer shuts off completely or reliably, replace it. The plastic ball float should be buoyant for proper operation.

9-6 Recommended Pump Tank Spare Parts

Part no.	Part description	Quantity
A0550190	Pressure gauge	1 per pump
A0102396	Float valve, 1” (approx. 25 mm)	1 per tank
A0069538	Plastic ball float, 6” (approx. 152 mm)	1 per tank
A0102394	Float rod, 10” (25 cm)
- Call Sterling Parts -	Pump seal and casing gasket	1 per pump

Check your Customer Information Packet for a complete list of spare parts and part numbers for your SCW Series chilling station.

SCW Series Central Chilling Stations

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Contents SCW Series Central Chilling Stations SCW Series Central Chilling Stations Wear Safety Glasses and Work Gloves Safety ConsiderationsTable of Contents Indicator Lights and Control Switches MMI Startup ChecklistsViewing and Operating Chiller Pumps Charts and Figures Necessary Documents IntroductionModels Covered Standard FeaturesAvailable Options Standard Features on Remote CondensersModel Number Nomeclature Nominal water flow gpm Typical Two-Circuit 60-195 Ton Water Cooled Chiller460/3/60 Vf 460/3/60 Typical Two-Circuit 60-195 Ton Remote Air Cooled ChillerScwr Series Remote Condenser Models Event of Shipping Damages Unpacking and InspectionIf the Shipment is Not Correct If the Shipment is Not CompleteReturns Bill of lading Packing listUncrating Your New Chiller SCW Series Central Chilling Stations Making Electrical Connections Installation Location ConsiderationsCheck Compressor Rotation Before Starting Unit To Process Piping ConsiderationsMaking Process Water Connections Making Tank Piping Connections Galvanic Corrosion Considerations Water Connection Sizing ConsiderationsWater Treatment Considerations Making Water-Cooled Condenser ConnectionsCondenser Water Out Installing the Remote Air-Cooled CondenserCondenser Water Water Pump Checking Motor DirectionCompressor Condenser Fan Staging AlarmsLead-Lag Compressors Lead-Lag PumpsFreezestat Control Chilled Water CircuitRefrigeration Circuit Percent by Freezing Protection CurveHigh pressure cutout setting Flow SwitchHigh Pressure Cutout Low Pressure CutoutControl Probe Control NozzleChilled Water Manifold Optional Condenser Water ManifoldSCW Series Central Chilling Stations Water-Cooled SCW Series Startup Checklist Startup ChecklistsSCW Series Central Chilling Stations Water-Cooled SCW Series Startup Remote Air-Cooled SCW Series Startup Checklist SCW Series Central Chilling Stations Fan Set on Set off Number Psi KPa Bars Remote Air-Cooled SCW Series StartupShutdown Determining Flow RateGraphic Panel Devices Indicator Lights and Control Switches MMISCW Series Central Chilling Stations Operator Interface Introduction Using the StandardOperator Interface SCW Series Standard Control Panel Using the SCW Series Standard Operator InterfaceViewing and Operating Chiller Pumps Viewing and Setting System Temperatures Viewing Active Alarms and Handling Alarm ConditionsSetting System Temperatures Touchscreen Interface Introduction MMI Using the AdvancedTouchscreen Interface Using the SCW Series Advanced Touchscreen Interface Main Menu Screen Viewing Compressor StatusChiller Status Screen Chiller Configuration Screen SCW Series Central Chilling Stations Compressor Run Time Display Screen Viewing Chiller Pump Status Pump Status Screen Pump Enables Screen Pump Run Time Display Screen Pumps Alarm Condition Screen Viewing and Setting System Temperatures System Status Screen Temperature Input Display Screen Lubrication Condenser MaintenanceRemote Air-Cooled Water-CooledPump Motor Seal Evaporator MaintenanceMakeup Valve Recommended Pump Tank Spare PartsPreventive Maintenance Service SCW Series Central Chilling Stations Troubleshooting Problem Possible Cause Solution Verify proper rotation if Service Notes Determining Flow Rate IndexSCW Series Central Chilling Stations Service Notes Service Notes Service Notes Parts Department Technical Assistance