Service Manual
160
WIRING DIAGRAMS
HIGH VOLTAGE!
DISCONNECT ALL POWER BEFORE SERVICING OR INSTALLING THIS
UNIT. MULTIPLE POWER SOURCES MAY BE PRESENT. FAILURE TO
DO SO MAY CAUSE PROPERTY DAMAGE, PERSONAL INJURY OR DEATH.
Wiring is subject to change. Always refer to the wiring diagram on the unit for the most up-to-date wiring.
*SZ180[36-60]1A*
USE N.E.C. CLASS 2 WIRE
NOTES:
1) TO INDOOR UNIT LOW VOLTAGE
TERMINAL BLOCK & INDOOR
THERMOSTAT.
2) START ASSIST FACTORY
EQUIPPED WHEN REQUIRED.
3) CRANKCASE HEATER MAY BE
FACTORY OR FIELD INSTALLED.
0140R00108
COMPONENT CODE
C --------------- CONTACTOR
CADM --------
COMFORT ALERT DIAGNOSTIC MODULE
CH ------------- CRANKCASE HEATER
CM ------------ OUTDOOR FAN MOTOR
COMP -------- COMPRESSOR
CS ------------- COMPRESSOR SOLENOID
DC ------------- DEFROST CONTROL
DFT ----------- DEFROST THERMOSTAT
DT ------------- DISCHARGE THERMOSTAT
HPS ----------- HIGH PRESSURE SWITCH
HVDR -------- HIGH VOLTAGE DEFROST RELAY
IO -------------- INTERNAL OVERLOAD
LPS ------------ LOW PRESSURE SWITCH
LVDR --------- LOW VOLTAGE DEFROST RELAY
LVJB ---------- LOW VOLTAGE JUNCTION BOX
RC--- --------- COMPRESSOR RUN CAPACITOR
RVC ----------- REVERSING VALVE COIL
SA ------------- START ASSIST (OPTIONAL)
SC ------------- START CAPACITOR FOR COMPRESSOR (OPTIONAL)
SR ------------- START RELAY FOR COMPRESSOR (OPTIONAL)
CONTROLS SHOWN WITH THERMOSTAT IN 'OFF' POSITION.
WIRING CODE
FACTORY WIRING
HIGH VOLTAGE
LOW VOLTAGE
OPTIONAL HIGH VOLTAGE
FIE
LD WIRING
HIGH VOLTAGE
LOW VOLTAGE
CONTROL BOX
EQUIPMENT GROUND
USE COPPER
CONDUCTORS ONLY
CADM
Y2
C
RY1
DC
SOL
CS
Y2
C
HPS
COMP
ALTERNATE DOUBLE
POLE CONTACTOR ONLY
IO
T1
C
M
A
I
N
R
A
U
X
5
S
SR
SA
2
1
SC
T2
C
L1
L2
(IF USED)
C
LPS
OR
BL
RD
O
C
R
NOTE 1
OUTDOOR POWER SUPPLY
SEE RATING PLATE
LVJB
DF1
DF2
HVDR
CH
(IF USED)
NOTE 3
W2
LVDR
O
R
O
O
Y1
C
RVC
W2
INDOOR POWER
SUPPLY
R
C
DFT
C
Y
DC
R
DFT
WH
W2
CADM
C
A
D
M
C
A
D
M
Y2
DT
COLOR CODE
BK --------------- BLACK
BL --------------- BLUE
BL/PK ---------- BLUE/PINK STRIPE
BR --------------- BROWN
OR --------------- ORANGE
PU --------------- PURPLE
RD --------------- RED
WH -------------- WHITE
YL --------------- YELLOW
YL/PK ---------- YELLOW/PINK STRIPE
GR/YL-----------GREEN/YELLOW
STRIPE
YL
C
R
S
RD
BK
AUX
MAIN
COMP
BK
CH
(IF USED) NOTE 3
BK
CM
WH
(HIGH)
BR
BK
YL
(LOW)
RD
BK
DC
SOL
YL
PURD
BL
CADM
Y2 R C Y1 R C S
CS
Y2
C
RD
BK
YL
BK
LPS
YL/
PK
YL/
PK
HPS
BL/
PK
DT
BK
BK
DFT
RVC
BK
RD RD
RD
SA
(IF USED)
NOTE 2
RC
C
YL
YL
YL
RD
YL
RD
SC
RD BL
L2
T2
L1
T1
C
BK
BK
RD
RDBL
YL/
PK
YL
BL
RD
BK BK
PU
SR
5
2
1
BK
YL
BL
DC
OR
C Y
O O
PU
BK
RD
R
R
LVDR
W2
WH
DFT
RD
H
V
D
R
DF2
DF1
BK
BK
BK
RD
BK
RD
RD
YL
Y2
PU Y1
BL/
PK
NOTE 2
Y
L
B
L
W
H
CM
CM
L1
L2
GND
CM
L1
L2
GND
BL
(COM)
GR/YL
T1
L1
T2
L2
ALTERNATE DOUBLE
POLE CONTACTOR
PU
BL
BR
HERM
BL
BL