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W
L
Y2
RAST 6-PIN
Y1
CONNECTOR
O
DS
C
I+
RAST 6-PIN
I-
CONNECTOR
R
DF
TST
VARIABLE CAPACITY
OUTDOOR UNIT
VARIABLE SPEED
FOR SINGLE STAGE OPERATION INSTALL A JUMPER BETWEEN Y1 TO Y2 ON THE OUTDOOR UNIT
TERMINAL STRIP
W
L
Y2
RAST 6-PIN
CONNECTOR
Y1
O
DS
C
I+
RAST 6-PIN
I-
CONNECTOR
R
DF
TST
VARIABLE CAPACITY
SINGLE STAGE FURNACE /
OUTDOOR UNIT
PSC AIR HANDLER
FOR SINGLE STAGE OPERATION INSTALL A JUMPER BETWEEN Y1 TO Y2 ON THE OUTDOOR UNIT
TERMINAL STRIP
W
L
Y2
RAST 6-PIN
CONNECTOR
Y1
O
DS
C
I+
RAST 6-PIN
I-
CONNECTOR
R
DF
TST
CONSTANT TORQUE /
VARIABLE CAPACITY
VARIABLE SPEED
OUTDOOR UNIT
FOR SINGLE STAGE OPERATION INSTALL A JUMPER BETWEEN Y1 TO Y2 ON THE OUTDOOR UNIT
TERMINAL STRIP
Figure 14. Conventional 24VAC Heat Pump
Thermostat Wiring - Single Stage
O.D. SENSOR
OPTIONAL
TC
TO
ACC2
ACC1
Y1
Y1
O
O
DS
DH
C
C
W2
W2
W1
W1
R
R
G
G
TWO STAGE /
CONVENTIONAL 24VAC
HEAT PUMP
GAS FURNACE
THERMOSTAT
O.D. SENSOR
OPTIONAL
TC
TO
ACC2
ACC1
Y1
Y
O
O
DH
C
C
W2
W1
W
R
R
G
G
CONVENTIONAL 24VAC
HEAT PUMP
THERMOSTAT
O.D. SENSOR
OPTIONAL
TC
TO
ACC2
ACC1
Y1
Y1
O
O
DS
DH
C
C
W2
W2
W1
W1
R
R
G
G
CONVENTIONAL 24VAC
HEAT PUMP
AIR HANDLER
THERMOSTAT
W
L
Y2
RAST 6-PIN
Y1
CONNECTOR
O
DS
C
I+
RAST 6-PIN
I-
CONNECTOR
R
DF
TST
VARIABLE CAPACITY
OUTDOOR UNIT
VARIABLE SPEED
W
L
Y2
RAST 6-PIN
CONNECTOR
Y1
O
DS
C
I+
RAST 6-PIN
I-
CONNECTOR
R
DF
TST
VARIABLE CAPACITY
SINGLE STAGE FURNACE /
OUTDOOR UNIT
PSC AIR HANDLER
W
L
Y2
RAST 6-PIN
CONNECTOR
Y1
O
DS
C
I+
RAST 6-PIN
I-
CONNECTOR
R
DF
TST
CONSTANT TORQUE /
VARIABLE CAPACITY
VARIABLE SPEED
OUTDOOR UNIT
Figure 15. Conventional 24VAC Heat Pump
Thermostat Wiring - Two Stage
O.D. SENSOR
OPTIONAL
TC
TO
ACC2
ACC1
R2
Y2
Y2
Y1
Y1
O
O
DS
DH
C
C
W2
W2
W1
W1
R
R
G
G
TWO STAGE /
CONVENTIONAL 24VAC
HEAT PUMP
GAS FURNACE
THERMOSTAT
O.D. SENSOR
OPTIONAL
TC
TO
ACC2
ACC1
R2
Y2
Y
Y1
O
DH
C
C
W2
W1
W
R
R
G
G
CONVENTIONAL 24VAC
HEAT PUMP
THERMOSTAT
O.D. SENSOR
OPTIONAL
TC
TO
ACC2
ACC1
R2
Y2
Y2
Y1
Y1
O
O
DS
DH
C
C
W2
W2
W1
W1
R
R
G
G
CONVENTIONAL 24VAC
HEAT PUMP
AIR HANDLER
THERMOSTAT
31-5000750 Rev. 1
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