Sterling Remote Air-Cooled SCW Series Startup, Fan Set on Set off Number Psi KPa Bars

Page 39

;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 in the following section.

5-5 Remote Air-Cooled SCW Series Startup

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

2.The touchscreen 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.

7.Operate the chiller, looking for leaks and listening for unusual noises or vibrations that could indicate improper operation.

8.Check condenser fans for pressure switch settings as shown in the table below:

Fan		Set on			Set off
number	psi	kPa	bars	psi	kPa		bars
1		Not applicable; Fan 1 is a variable-speed fan
2	155	1,069	10.7	120	828		8.3
3	170	1,172	11.7	135	931		9.3
4	185	1,276	12.8	150	1035		10.3
5	200	1,379	13.8	165	1,138		11.4

SCW Series Central Chilling Stations

Page 39 of 77

Image 39

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 InspectionBill of lading Packing list If the Shipment is Not CompleteIf the Shipment is Not Correct ReturnsUncrating Your New Chiller SCW Series Central Chilling Stations Making Electrical Connections Installation Location ConsiderationsCheck Compressor Rotation Before Starting Unit Piping Considerations Making Process Water ConnectionsTo Process Making Tank Piping Connections Making Water-Cooled Condenser Connections Water Connection Sizing ConsiderationsGalvanic Corrosion Considerations Water Treatment ConsiderationsInstalling the Remote Air-Cooled Condenser Condenser WaterCondenser Water Out Checking Motor Direction CompressorWater Pump Condenser Fan Lead-Lag Pumps AlarmsStaging Lead-Lag CompressorsChilled Water Circuit Refrigeration CircuitFreezestat Control Percent by Freezing Protection CurveLow Pressure Cutout Flow SwitchHigh pressure cutout setting High Pressure CutoutOptional Condenser Water Manifold Control NozzleControl Probe Chilled 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 Using the Standard Operator InterfaceOperator Interface Introduction 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 Using the Advanced Touchscreen InterfaceTouchscreen Interface Introduction MMI 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 Water-Cooled Condenser MaintenanceLubrication Remote Air-CooledRecommended Pump Tank Spare Parts Evaporator MaintenancePump Motor Seal Makeup ValvePreventive 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