Pub. No. 18-HD29D3-4 9
Installer’s Guide
R
G
Y/
Y1
W1
B
24VAC HOT
24VAC
common
COMFORT CONTROL
TWO STAGE COOLING
SPLIT COIL VARIABLE SPEED AIR HANDLER
BK ENABLED
FAN
COOLING -1st
HEATING -1st
HEATING -2nd
W2
O
R
G
W1
W2
Y1/
Y
LO
Y
B
TWO SEPARATE
AIR CONDITIONERS
VS AIR HANDLER
& ELECTRIC HEAT
W3
HEATING -3rd
Y2
COOLING-2nd
BK
VS MODE -fan
Y/
Y2
Y
BK
B
SECOND
STAGE
FIRST
STAGE
O
W3
B
NOTE: Two additional wires are required for Outdoor Temperature Sensor.
Note B - Cut/remove the factory installed "BK" jumper at the indoor unit.
R
G
Y/
Y1
W1
B
24VAC HOT
24VAC
common
COMFORT CONTROL
TWO STAGE COOLING
VARIABLE SPEED INDOOR
BK DISABLED
FAN
COOLING -1st
HEATING -1st
HEATING -2nd
W2
O
R
G
W1
W2
Y1/
Y
LO
Y1
B
TWO STAGE
AIR CONDITIONER
TWO STAGE V.S.
GAS FURNACE or
VS AIR HANDLER
& ELECTRIC HEAT
B
C
W3
HEATING -3rd
Y2
COOLING-2nd
BK
Y/
Y2
Y2
BK
R
O
W3
NOTE: See Fig. OIL-1 for external relay connections for oil furnaces.
NOTE: Two additional wires are required for Outdoor Temperature Sensor.
R
G
Y/
Y1
W1
B
24VAC HOT
24VAC
common
COMFORT CONTROL
TWO STEP COOLING
VARIABLE SPEED INDOOR
BK DISABLED
FAN
COOLING -1st
HEATING -1st
HEATING -2nd
W2
O
R
G
W1
W2
Y1/
Y
LO
B
TWO STEP
AIR CONDITIONER
TWO STAGE VS
GAS FURNACE or
VS AIR HANDLER
& ELECTRIC HEAT
B
C
W3
HEATING -3rd
Y2
COOLING-2nd
BK
Y/
Y2
Y1
BK
O
Y2
W3
Note A - The installer must jumper "R" to "O" at the LVTB.
Note B - Cut/remove the factory installed "BK" jumper at the indoor unit.
NOTE: See Fig. OIL-1 for external relay connections for oil furnaces.
NOTE: Two additional wires are required for Outdoor Temperature Sensor.
Figure CL-1
Figure CL-3
Figure CL-2
Figure CL-4
R
G
Y/
Y1
W1
B
24VAC HOT
24VAC
common
COMFORT CONTROL
ONE OR TWO STAGE OR TWO STEP COOLING
VARIABLE SPEED INDOOR
BK ENABLED
FAN
COOLING -1st
HEATING -1st
HEATING -2nd
W2
O
R
G
W1
W2
Y/
Y1
B
ONE OR TWO STAGE
OR TWO STEP AIR
CONDITIONER
TWO STAGE VS
GAS FURNACE or
VS AIR HANDLER
& ELECTRIC HEAT
B
C
W3
HEATING -3rd
Y2
COOLING-2nd
BK
VS MODE -fan
Y/
Y2
Y2
BK
Y1/
Y
LO
O
R
W3
NOTE: See Fig. OIL-1 for external relay connections for oil furnaces.
NOTE: Two additional wires are required for Outdoor Temperature Sensor.
Note B - Cut/remove the factory installed "BK" jumper at the indoor unit.
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