WIRING DIAGRAMS
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.
54
+5V DC
24 VAC
G
POWER SUPPLY
INPUT
POWER SUPPLY C OMMON
OUT TO HP CONTROL
P3-1
6.8K
P3-7
Y-HP
P1-6
P1-4
COMPRESSOR OUTPUT
P1-7
O
POWER SUPPLY OUT
TO THERMOSTAT
24 VAC
Q2
K3
W1
POWER SUPPLY I NPUT
(COMMON)
+VD C
E/W1
Y
P2-8
CAL L FOR
REVERS ING VALVE
P3-5
C
C
BLOWER FAN DEMAND
OUTPUT
P3-3
P1-8
Y-STAT
Y-FURN
C
P3-2
P1-1
P3-8
REVERS ING VALVE
OUTPUT
BRE AK FOR ODT
FURNACE DEMAND
OUTPUT
P1-3
R
24 VAC
K4
HP CALL FOR FURNACE
(DURING DEFROST)
W2
Y2-STAT
Y2-FURN
CAL L FOR
COMP RESSOR
P2-7
P3-6
+VD C
Y2
O
REVERSING
VALVE OUTPUT
Q1
Y
P2-4
K1
OT-NO
Y
P2-9
CALL FOR 2ND STAGE
COMP RESSOR
Y2
1.0K
G-FURN
P2-1
C
OT-C
C
SECOND STAGE
COMPRESSOR OUTPUT
G
CAL L FOR
EMERGENC Y HEAT
W1-FURN
W2-HP
F1
3A
OT-NC
24 VAC
2ND S TAGE C OMPRESSOR
DEMAND OUTPUT
W1
CAL L FOR
FURNACE HEAT
6.8K
G-STAT
+VD C
P3-4
R
N
A
C
E
P2-6
K2
ODT (OUTDOOR
THERMOSTAT)
Y
R
SECOND STAGE FURNACE
DEMAND OUTPUT
MICROPROCESSOR
Y2-HP
P1-5
CALL FOR 2ND STAGE
FURNACE HEAT
O
W2
CAL L FOR
BLOWER FAN
E
R
M
S
A
P2-5
1 2
R
Y2
POWER
SUPPLY
COMP RESSOR
CONTACTOR OUTPUT
O
E
A
P
M
P
P2-3
+5V DC
W2
P3-9
P2-2
E
POWER SUPPLY C OMMON
OUT TO THERMOSTAT
POWER SUPPLY OUT
TO HP CONTROL
C
P1-2
This wiring diagram is for reference only. Not all wiring is as shown above.
Refer to the appropriate wiring diagram for the unit being serviced.
(For use with Heat Pumps in conjunction with 80% or 90% Single-Stage or Two-Stage Furnaces)
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