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Figure 3-7: Wiring Diagram—Water-Cooled Wye Delta
COMP
1M
COMPRESSOR MOTOR STARTER
1MOL
COMPRESSOR MOTOR STARTER OVERLOAD CONTACT
2M
COMPRESSOR MOTOR STARTER RUN CONTACTOR
S
COMPRESSOR START CONTACTOR
3M
FAN MOTOR STARTER
3MOL
FAN MOTOR STARTER OVERLOAD CONTACT
4MOL
FAN MOTOR STARTER OVERLOAD CONTACT
6M
OPTIONAL CONTACTOR FOR PF CAPACITOR
1FU
TRANSFORMER PRIMARY FUSES
2FU
TRANSFORMER SECONDARY FUSE
3FU
COOLER FAN BRANCH FUSES
WET SUMP PRESSURE SENSOR - SET PER FACE OF
P1
ORDER
P2
PACKAGE DISCHARGE PRESSURE SENSOR
P3
OIL FILTER DISCHARGE PRESSURE SENSOR
P4
OIL FILTER UPSTREAM PRESSURE SENSOR
T1
UNIT DISCHAGE TEMPERATURE RTD
T2
DRY DISCHARGE TEMPERATURE RTD
T3
INJECTION OIL TEMPERATURE RTD
T4
INTERSTAGE TEMPERATURE RTD
DPSW1
OIL FILTER DIFFERENTIAL PRESSURE SWITCH (OPT'L)
PSW1
INLET AIR FILTER SWITCH: 22 IN WC (558.9 MM WC)
PSW2
WATER PRESSURE SWITCH:10PSI (0.7 BAR)
SOL1
LOAD CONTROL SOLENOID VALVE
SOL2
SPIRAL CONTROL SOLENOID VALVE (OPTIONAL)
SOL3
START CONTROL SOLENOID VALVE
SOL4
SEQUENCING/FULL LOAD SOLENOID VALVE (OPT)
SOL5
COMBO DRAIN/JZL DRAIN SOLENOID VALVE
SOL6
WATER SHUTOFF SOLENOID VALVE (OPTIONAL)
1XFMR
CONTROL VOLTAGE TRANSFORMER
2XFMR
SUPERVISOR 3 STEPDOWN TRANSFORMER 24VAC
K1
INTERNAL RUN RELAY CONTACT
DESCRIPTION
COMP
K2
INTERNAL Y-DELTA RELAY CONTACT
K3
INTERNAL LOAD CONTROL RELAY CONTACT
K4
INTERNAL SEQUENCE RELAY CONTACT
K5
INTERNAL ELECTRIC DRAIN RELAY CONTACT
K6
INTERNAL COMMON FAULT RELAY CONTACT
K7
INTERNAL COMMON WARNING RELAY CONTACT
K8
INTERNAL SPECIAL FUNCTION CONTACT
PMR
OPT'L POWER MONITOR RELAY
HRN
OPT'L AUDIBLE ALARM
HTR1
SUMP HEATER
HTR2
HEAT TRACE
HTR3
TRAP HEATER
HTR4
CONTROL PANEL HEATER
TH
THERMOSTAT FOR HEAT TRACE
NOTES:
1.
CUSTOMER TO FURNISH FUSED OR CIRCUIT BREAKER DISCON-
NECT PER LOCAL CODES.
2.
REMOVE JUMPER FOR AUXILLIARY E-STOP STRING DEVICES.
3.
OPTIONAL
4.
2ND FAN MOTOR FOR 400HP AND LARGER.
5.
BELDEN TYPE 9842 COND. 6 2 TWISTED PAIR W/SHIELD OR
EQUIVALENT. TO MATCHING TERMINALS ON NEXT COMPRES-
SOR. REFER TO SUPERVISOR SEQUENCING PROTOCOL MAN-
UAL.
DESCRIPTION
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