Sterling installation manual Water-Cooled SCW Series Startup

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2.Close the gauge cock leading to the pump suction and open the gauge cock leading to the pump discharge.

3.Close the discharge butterfly valve, crack it open, then start the pump and observe the gauge.

•If the gauge indicates within 15 psi (103.4 kPa/1.03 bars) below the pump curve, pump rotation is correct. Pump rotation is clockwise opposite the shaft end.

•If the gauge indicates 20 psi (137.9 kPa/1.38 bars) or more below the pump curve, the pump is running backwards. Reverse rotation by interchanging any two power mains to the pump motor or starter.

•Recheck the pressure to be sure it increased.

;Check the water level in the pump tank to be sure the pump does not run dry while the system piping is being filled.

;Check your work and proceed to the Startup procedure.

5-3 Water-Cooled SCW Series Startup

1.Start the chiller by pushing the Start button on the control panel of the unit.

2.The screen will display the Main Menu screen.

3.If your chiller has been setup to control the pump tank, the recirculation pump will turn on first, then after 5 seconds the process pump will turn on. If configured with a standby pump, the lead/lag will control which pump turns on.

4.Fifteen (15) seconds after the last pump turns on the first compressor will turn on. Based on the temperature of the water, the controller will turn on compressors every 15 seconds.

5.Adjust the Freezestat cut-out, located in the main electrical enclosure, to 10°F (6ºC) below the process temperature set point you want.

Note: If the recirculation pump does not turn on (or that the flow switch is not satisfied) the compressors will not be allowed to turn on.

6.Check the pump(s) amp draws and pressures. The amp draws must be within the pump(s) running load and service factor amps.

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SCW Series Central Chilling Stations

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Contents SCW Series Central Chilling Stations SCW Series Central Chilling Stations Safety Considerations Wear Safety Glasses and Work GlovesTable of Contents Startup Checklists Indicator Lights and Control Switches MMIViewing and Operating Chiller Pumps Charts and Figures Introduction Necessary DocumentsStandard Features Models CoveredStandard Features on Remote Condensers Available OptionsModel Number Nomeclature Typical Two-Circuit 60-195 Ton Water Cooled Chiller Nominal water flow gpm460/3/60 Vf Typical Two-Circuit 60-195 Ton Remote Air Cooled Chiller 460/3/60Scwr Series Remote Condenser Models Unpacking and Inspection Event of Shipping DamagesIf the Shipment is Not Complete If the Shipment is Not CorrectReturns Bill of lading Packing listUncrating Your New Chiller SCW Series Central Chilling Stations Installation Location Considerations Making Electrical ConnectionsCheck Compressor Rotation Before Starting Unit Piping Considerations Making Process Water ConnectionsTo Process Making Tank Piping Connections Water Connection Sizing Considerations Galvanic Corrosion ConsiderationsWater Treatment Considerations Making Water-Cooled Condenser ConnectionsInstalling the Remote Air-Cooled Condenser Condenser WaterCondenser Water Out Checking Motor Direction CompressorWater Pump Condenser Fan Alarms StagingLead-Lag Compressors Lead-Lag PumpsChilled Water Circuit Refrigeration CircuitFreezestat Control Freezing Protection Curve Percent byFlow Switch High pressure cutout settingHigh Pressure Cutout Low Pressure CutoutControl Nozzle Control ProbeChilled Water Manifold Optional Condenser Water ManifoldSCW Series Central Chilling Stations Startup Checklists Water-Cooled SCW Series Startup ChecklistSCW Series Central Chilling Stations Water-Cooled SCW Series Startup Remote Air-Cooled SCW Series Startup Checklist SCW Series Central Chilling Stations Remote Air-Cooled SCW Series Startup Fan Set on Set off Number Psi KPa BarsDetermining Flow Rate ShutdownIndicator Lights and Control Switches MMI Graphic Panel DevicesSCW Series Central Chilling Stations Using the Standard Operator InterfaceOperator Interface Introduction Using the SCW Series Standard Operator Interface SCW Series Standard Control PanelViewing and Operating Chiller Pumps Viewing Active Alarms and Handling Alarm Conditions Viewing and Setting System TemperaturesSetting System Temperatures Using the Advanced Touchscreen InterfaceTouchscreen Interface Introduction MMI Using the SCW Series Advanced Touchscreen Interface Viewing Compressor Status Main Menu ScreenChiller 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 Condenser Maintenance LubricationRemote Air-Cooled Water-CooledEvaporator Maintenance Pump Motor SealMakeup Valve Recommended Pump Tank Spare PartsPreventive Maintenance Service SCW Series Central Chilling Stations Troubleshooting Problem Possible Cause Solution Verify proper rotation if Service Notes Index Determining Flow RateSCW Series Central Chilling Stations Service Notes Service Notes Service Notes Technical Assistance Parts Department