SterlingTEK A0551797 manual High Pressure Cutout, Low Pressure Cutout, Flow Switch

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4-8	High Pressure Cutout
	This electro-mechanical safety feature opens the control circuit if
	the system condensing pressure exceeds a safe level.

	High pressure cutout setting
	Model		psi	kPa		bars
SSC Series water-cooled chilling stations			290 psi	2,000 kPa		20 bars
SSC Series remote air-cooled chilling stations			375 psi	2,586 kPa		26 bars

Important!

The high pressure cutout is a manual reset control,

so you should reset it once.

If the problem persists, call a refrigeration service technician

to analyze the problem and to reset the control.

4-9 Low Pressure Cutout

This encapsulated switch safety feature prevents the compressor suction pressure from dropping below a pre-set point. It is factory set to open the control circuit when pressure drops below a safe level. The chiller will need to be restarted when the suction pressure reaches above 65 psi (448.2 kPa/4.5 bars).

	Opens control circuit @			Resets control circuit @
Model	psi	kPa	bars	psi	kPa	bars
SSC Series water-cooled chilling stations	15 psi	103.4 kPa	1.0 bars	30 psi	206.9 kPa	2.1 bars
SSC Series remote air-cooled chilling	15 psi	103.4 kPa	1.0 bars	30 psi	206.9 kPa	2.1 bars
stations

4-10 Flow Switch

The flow switch shuts down the chiller if the evaporator water flow falls below a safe operating gallons-per-minute (liters-per-minute) flow rate.

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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 Complete If the Shipment is Not CorrectReturns Uncrating Your New Chiller SSC Series Central Chilling Stations 3Installation Installation Location ConsiderationsMaking Electrical Connections SSC Series Central Chilling Stations Piping Considerations Making Process Water ConnectionsAll Models Making Tank Piping Connections From ProcessWater Treatment Considerations Water Connection Sizing ConsiderationsGalvanic Corrosion Considerations Making Water-Cooled Condenser ConnectionsInstalling the Remote Air-Cooled Condenser Condenser WaterChecking Motor Direction CompressorSSC Series Central Chilling Stations Lead-Lag Compressors Alarms Staging Lead-Lag PumpsChilled Water Circuit Refrigeration CircuitFreezestat Control Volume Freezing Protection CurveFlow Switch High Pressure CutoutLow Pressure Cutout Chilled Water Manifold Control NippleControl Probe 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 Using the Standard Touchscreen InterfaceTouchscreen Interface Introduction MMI Using the SSC Series Standard Touchscreen Interface SSC Series Standard Control PanelMain Menu Screen Viewing and Operating Chiller Compressors Viewing Compressor StatusCompressor Status Screen Chiller Configuration Screen Operating the chiller compressorsCompressor Enable Screen Compressor Lead/Lag ScreenViewing Compressor Run Times Compressor Run Time Display ScreenViewing and Operating Chiller Pumps Viewing Chiller Pump StatusPump Status Screen Pump Enables Screen Operating Chiller PumpsViewing Pump Run Times Pump Lead/Lag ScreenPump 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 LubricationMakeup Valve Evaporator MaintenancePump Motor Seal 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