37
Wiring is subject to change. Always refer to the wiring diagram on the unit for the most up-to-date wiring.
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 DIAGRAMS
RD
BK
POWER DIAGRAM
DCH072***(4/7)
2 SPEED EM
2 STAGE COMP
5. SEE ACCESSORY KIT LITERATURE FOR OPTIONAL CONVENIENCE OUTLET WIRING DIAGRAM.
4 SEE CONTROL DIAGRAM FOR CONTROL TRANSFORMER LOW VOLTAGE CONNECTIONS
3 208/230V SUPPLY POWER UNITS ARE FACTORY CONNECTED TO THE CONTROL TRANSFORMER 240V TAP.
MOVE WIRE CONNECTION FROM 240V TAP TO 208V TAP WHEN 208V POWER SUPPLY IS USED.
2 THE CONTROL TRANSFORMER HAS MULTIPLE HIGH VOLTAGE TAPS.
ENSURE WIRE CONNECTIONS ARE CORRECT FOR UNIT SUPPLY VOLTAGE RATING
1. REPLACEMENT WIRE MUST BE SAME SIZE AND TYPE OF INSULATION AS ORIGINAL (USE COPPER CONDUCTORS ONLY).
UNIT TERMINALS ARE NOT DESIGNED FOR OTHER CONDUCTORS
THE USE OF OTHER TYPE CONDUCTORS MAY CAUSE DAMAGE TO THE UNIT
NOTES:
0140L05440-A
GND
L1
L2
L3
LINE VOLTAGE
BK
RD
RD
PU
BK
YL
OR
BK
RD
YL
FC
BK(12)
BK(13)
BK(11)
BK
OR
RD
BK
RD
BK
OR
RD
OR
BK
RD
OR
L1
L2
L3
T1
T2
T3
BC1
BK
BK
RD
L1
L2
L3
T1
T2
T3
BC2
RD
OR
L1
L2
L3
T1
T2
T3
CC
OR
RD
BK
OR
RD
YL
BK
T1
T3
COMP
T2
EM
OR
RD
BK
WH
OR
BL
GY
BL
YL
GY
BL
YL
GR
RD BK
2,3
4
24V CNTL
VOLTAGE
LINE
VOLTAGE
TR1
LOW VOLTAGE
FI
ELD
WIRING
HIGH VOLTAGE
Y2
2ND STAGE
COOL CALL
(OUTPUT)
Y1
1ST STAGE
COOL CALL
(OUTPUT)
W2
2ND STAGE
HEAT CALL
(OUTPUT)
W1
1ST STAGE
HEAT CALL
(OUTPUT)
G
C
R
TB1
CONNECTION
24VAC-PWR
(INPUT)
THERMOSTAT
IN / OUT
24VAC - COM
(INPUT)
FAN CALL
(OUTPUT)
THERMOSTAT CONNECT
IO
NS
YELLOW/
PINK STRIPE
YELLOW
YL/PK
BL/PK
BK
W
IRE CODE
BLACK
BL
BLUE
BR
BROWN
GR
GREEN
GY
GRAY
OR
ORANGE
PK
PINK
PU PURPLE
RD
RED
WH
WHITE
YL
BLUE/
PINK STRIPE
FACTORY WIRING
LOW VOLTAGE
HIGH VOLTAGE
HIGH VOLTAGE
OPTIONAL
BK
RD
BK
RD
OR
BLOWER CONTACTORBC
BLOWER RELAY
COMPRESSOR CONTACTOR
CC
C
O
M
P
O
NENT LEGEN
D
BR
BK
PU
CRANKCASE HEATER
CCH
BK GR
RD
BK
CCH
6
6 2 SPEED EVAPORATOR MOTOR: BLACK LEADS FOR HIGH SPEED OPERATION, AND
WHITE / BLUE / ORANGE LEADS FOR LOW SPEED OPERATION.
BK
3
1
CMR
YL
CM
PU
BR
BK
GR
PU
BR
BK
BK
RD
3
1
CHR
CRANKCASE HEATER RELAY
CHR
CRANKCASE HEATER SWITCH
CHS
CONDENSER MOTOR
CM
COMPRESSOR
COMP
DC
DEFROST CONTROL
CS
COMPRESSOR 2ND STAGE SOLENOID
DFT
DEFROST THERMOSTAT SWITCH
TB3
TR1
TB1
TRANSFORMER 1, CONTROLS
(LINE VOLTAGE / 24VAC)
TERMINAL BLOCK 1, LOW VOLTAGE
TERMINAL BLOCK 3, LOW VOLTAGE
SSHR
2ND STAGE HEAT RELAY
EM
ECON
EVAPORATOR MOTOR
ECONOMIZER
FC
FAN CAPACITOR
EVAPORATOR BLOWER
TIME DELAY RELAY
EBTDR
PLUG / CONNECTOR, MALE
PLM
HIGH PRESSURE SWITCH
LOW PRESSURE SWITCH
PLUG / CONNECTOR, FEMALE
HPS
LPS
PLF
E
Q
U
P
I
M
E
N
T
G
R
O
U
N
D
G
N
D
DEFROST ISOLATION RELAY
DR
REVERSING VALVE COIL
RVC
CONDENSER MOTOR RELAY
CMR
POWER DIAGRAM FOR DCH072***(4/7)V
(HEAT PUMP, 2 SPD EVAP FAN, 2 STAGE COMP, 460V,575V)
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