IOM 1274-3 • CENTRIFUGAL WATER CHILLERS 32 www.DaikinApplied.com
Figure 30: Compressor Control Panel Electrical and Sensor Connections
Figure 31: Unit Controller Electrical and Sensor Connections
MOTOR COOLING
SOLENOID
(WDC ONLY)
VANE OPEN
SWITCH
LIQ. INJ.
SOLENOID
HOT GAS
SOLENOID
(OPTION)
VANE CLOSE
SWITCH
VANE CONTROL
SOLENOIDS
OIL COOLER
PROPORTIONAL
VALVE
VFD / STARTER
CONTROL CABLE
OIL PUMP
HEATERS
COMPRESSOR
HEATERS
GUARDISTOR
UNLOAD
LOAD
SECOND HEATER CABLE FROM
COMPR. ON WSC / WDC / WCC
079-087 ONLY.
NUMBER OF HEATERS WILL VARY
DEPENDING ON COMPRESSOR SIZE.
JUNCTION BOX NOT ON ALL UNITS.
2
ND
BOX ONLY
ON 87-126
MOTORS.
CONNECT LEAD
155 T O TERMINAL
IF 2
ND
BOX IS NOT
USED.
(VFD OPTION ONLY)
SEE NOTE 1:
EITHER WIRED DIRECTLY FROM
STARTER
(IF STARTER IS FACTORY MOUNTED,
FREESTANDING, OR FIELD MOUNTED)
OR
LOCATED IN THE
COMPRESSOR TERMINAL BOX
(IF STARTER IS FREESTANDING OR
FIELD MOUNTED)
CLFS
FLOW SWITCHES
ELFS
COMPRESSOR
CONTROL BOX
CS4 OIL SUMP TEMP
CS5 CMP R SUCTI ON TEMP
CS7 CMPR DISCHARGE TEMP
CS10 EVAP. LEAVI NG WATER TEMP
CS9 OIL FEED T EMP
CS6 COND. PRESSURE SENSOR
CS3 EVAP. PRESSURE SENSOR
CS2 OIL FEED PRESSURE SENSOR
CS1 OIL SUMP PRESSURE SENSOR
HIGH
PRESSURE
SWITCH
CABLES ARE FIELD OR UNIT MOUNTED
US2
OPERATOR
INTERFACE
PANEL
COND. GPM SENSOR
(FIELD INSTALLED)
EVAP. GPM SENSOR
(FIELD INSTALLED)
TOWER BYPASS/TOWER VFD
(FIELD INSTALLED)
WATER RESET/REMOTE START-STOP/
MODE/DEMAND LIMIT
(FIELD INSTALLED)
WATER PUMPS
(FIELD INSTALLED)
TOWER STAGING
(FIELD INSTALLED)
ALARMS
(FIELD INSTALLED)
POWER
(FIELD INSTALLED)
UNIT CONTROL BOX
EVAP. ENTERING WATER TEMP.
COND. ENTERING WATER TEMP.
COND. LEAVING WATER TEMP.
US2
US3
US4
US5
US9
US10
LIQUID LINE TEMP.
(OPTIONAL) ENTERING HEAT RECOVERY
(OPTIONAL) LEAVING HEAT RECOVERY
Plan CABLE
UC POWER CABLE
POWE R AND SIGNAL CABLES FOR MONITOR
RUN CABLES TO
COMPRESSOR BOX
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