Sterling SCW Series installation manual Verify proper rotation if

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	Problem	Possible Cause	Solution
			Verify proper rotation; if
		Pump is running in reverse.	incorrect, see Changing
		Pump is running in reverse.	Rotation Direction on Page
			Rotation Direction on Page
			25 for more information.
	Pump pressure is too low.		Clean the system. You may
	Pump pressure is too low.		also have to pull the pump
			also have to pull the pump
		Check for foreign matter.	and inspect the impeller.
		Check for foreign matter.	Check for foam in the water
			Check for foam in the water
			circuit; add anti-foam if
			needed.
			Isolate evaporator, thaw out,
			check for leaks. Check
	Process water pressure low,	Evaporator frozen.	coolant solution. Coolant
	pressure at pump high.	Evaporator frozen.	solution should be good for at
	pressure at pump high.		solution should be good for at
			least 10ºF (6ºC) below
			leaving water temperature.
		Restricted condenser air flow.	Clean air filters, clean
		Restricted condenser air flow.	condenser, check water flow.
			condenser, check water flow.
		Refrigerant not feeding.	Check superheat on
		Refrigerant not feeding.	expansion valve.
			expansion valve.
		Improper water/glycol	Make sure that coolant
		Improper water/glycol	mixture protection is right for
		solution.	mixture protection is right for
	Unit runs continuously, but	solution.	the process.
	Unit runs continuously, but		the process.
	not enough cooling	Poor heat transfer in	Backflush and clean
	power.	evaporator.	evaporator.
		Unit low on refrigerant.	Call service.
		Low water flow through	Increase flow to design flow
		evaporator.	of 2.4 gpm/ton.
		Inefficient compressor.	Call service.
		Unit under-sized for	Call sales representative.
		application.	Call sales representative.
		application.

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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 DamagesReturns If the Shipment is Not CompleteIf the Shipment is Not Correct Bill of lading Packing listUncrating Your New Chiller SCW Series Central Chilling Stations Installation Location Considerations Making Electrical ConnectionsCheck Compressor Rotation Before Starting Unit Making Process Water Connections Piping ConsiderationsTo Process Making Tank Piping Connections Water Treatment Considerations Water Connection Sizing ConsiderationsGalvanic Corrosion Considerations Making Water-Cooled Condenser ConnectionsCondenser Water Installing the Remote Air-Cooled CondenserCondenser Water Out Compressor Checking Motor DirectionWater Pump Condenser Fan Lead-Lag Compressors AlarmsStaging Lead-Lag PumpsRefrigeration Circuit Chilled Water CircuitFreezestat Control Freezing Protection Curve Percent byHigh Pressure Cutout Flow SwitchHigh pressure cutout setting Low Pressure CutoutChilled Water Manifold Control NozzleControl Probe 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 Operator Interface Using the StandardOperator 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 Touchscreen Interface Using the AdvancedTouchscreen 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 Remote Air-Cooled Condenser MaintenanceLubrication Water-CooledMakeup Valve Evaporator MaintenancePump Motor Seal 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