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WC SERIES VARIABLE SPEED DUAL SCREW CHILLER INSTALLATION MANUAL
HE
GPM x 500*
Legend
Abbreviations and Definitions
Reference Calculations
Heating Calculations:
Cooling Calculations:
LWT = EWT +
HR
GPM x 500*
LWT = EWT -
NOTE:
* When using water.
HWR = Hot Water Return
HWS = Hot Water Supply
CWR = Cold Water Return
CWS = Cold Water Supply
HVR = Heat Recovery Return
HVS = Heat Recovery Supply
HVP = High Voltage Panel
LVP = Low Voltage Panel
TC = Total Cooling Capacity in MBTUH
MBTUH = Thousands of British Thermal Units per hour
LWT = Leaving Water Temperature
EWT = Entering Water Temperature
EER = Energy Efficiency Ratio (TC/kW)
COP = Coefficient of Performance (HC/kW x 3.413)
PSI = Pressure drop in pounds per square inch
HC = Heating Capacity in MBTUH
HE = Heat of Extraction in MBTUH
kW = kilowatt
ft hd = pressure drop in feet of head
HR = Heat of Rejection
Verify the following:
• High voltage is correct and matches nameplate
• Fuses, breakers and wire size are correct
• Low voltage wiring is complete
• Piping is complete and the water system has been
cleaned and flushed
• Air is purged from piping system
• Isolation valves are open and water control valves are
wired
• Service/access panels are in place
• Transformer has been switched to lower voltage tap if
needed (208/230 volt units only)
• Unit controls are in “off” position
• Flow switches are installed and ready
WARNING: Verify ALL water controls are open and allow
water flow PRIOR to engaging the compressor. Failure to
do so can result in freezing the heat exchanger or water
lines causing permanent damage to the unit.
Unit Startup
Summary of Contents for WC Series
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