Wiring Schematics
COIL
RELAY
WE
BK
SUPPRESSOR
SHORT
CYCLE
TIMER
THERMOSTAT
COMPRESSOR
GN
TO CUSTOMER'S
ALARM SYSTEM
TERMINAL BLOCK ON UNIT
BLR MTR
EVAPORATOR
BLR MTR
CONDENSER
S
R C
O/L
RELAY
SHORT
CYCLE
PROTECTOR
OPTIONAL
CRANKCASE HEATER
CAP
CONDENSER
BLWR MTR
WE
BK
Y
R
PRESSURE
SWITCH
(OPTIONAL)
Y
R
PRESSURE
SWITCH
(OPTIONAL)
ON
0FF
SWITCH
ADDITIONAL OPTIONS
1) AIRFLOW SWITCH
2) COOLING EFFECT DETECTOR
NOTES:
1) ADDITIONAL OPTIONS ARE WIRED TO AN
INDIVIDUAL 3 POSITION TERMINAL BLOCK
SHOWN ABOVE.
2) 50Hz: CONTACT KOOLTRONIC
3) EXCESS PRESSURE DETECTOR
FOR KA4C1-4P24 ONLY
GN
S
C
R
COMPRESSOR
WE
BK
SUPPRESSOR
O/L
OPTIONAL
CAP.
1
3
EVAP
BLOWER
MOTOR
0
1
4
8
2
6
CRANKCASE HEATER
MOTOR
BLOWER
COND
TIMER
CYCLE
SHORT
PRESSURE
SWITCH
OPTIONAL
RELAY
RELAY
S
L
2
1
M
CAP
WE
BK
RED
ALARM SYSTEM
TO CUSTOMER
BLOCK
TERMINAL
EXCESS PRESURE DETECTOR
INCREASE
OPENS ON PRESS.
RED TO BLUE
INCREASE
CLOSES ON PRESS.
RED TO YELLOW
COMMON
RED
BLUE
YELLOW
YELLOW
BLUE
RED
h
COMMON
RED TO YELLOW
CLOSES ON TEMP.
INCREASE
RED TO BLUE
OPENS ON TEMP.
INCREASE
COOLING EFFECT DETECTOR
TERMINAL
BLOCK
TO CUSTOMER
ALARM SYSTEM
{
LOW AIR FLOW DETECTOR
{
TERMINAL
BLOCK
RD-N.C.
BK-N.0.
WE-COM
TO CUSTOMER
ALARM SYSTEM
Y
R
6
2
8
1
4
0
RELAY
R
B
HEATING
T-STAT
CUTOUT
THERMAL
HEATER
T-STAT
Y
R
B
ON/OFF
SWITCH
(FOR UL LISTED
UNITS ONLY)
h
{
10
WD-176 REV. C
WD-208 REV. D
P24 SERIES
P28 & P36 SERIES, 2000-4000 BTU/H
P28 & P36 SERIES, 5000-7000 BTU/H
(Consult factory for 8000 BTU/H P36)
