Pub. No. 11-HD03D1-3
3
Installer’s Guide
R
G
Y
W
R
G
W1
W2
Y
Y
B
24VAC HOT
COMFORT CONTROL
TERMINAL BLOCK
TWO STAGE GAS FURNACE - SINGLE STAGE COOLING
SINGLE STAGE
AIR CONDITIONER
FAN
COOLING
HEATING
TWO STAGE
GAS FURNACE
Resistor is required on Y to B
at the indoor unit low voltage
terminal block when outdoor
unit contactor coil is not directly
connected to Y or if a compressor
anti-short cycle timer has been
installed.
B
C
Required
Figure 4
R
G
Y
W
R
G
W
Y
Y
B
24VAC HOT
COMFORT CONTROL
TERMINAL BLOCK
SINGLE STAGE
GAS FURNACE
SINGLE STAGE
AIR CONDITIONER
FAN
COOLING
HEATING
Resistor is required on Y to B
at the indoor unit low voltage
terminal block when outdoor
unit contactor coil is not directly
connected to Y or if a compressor
anti-short cycle timer has been
installed.
B
C
SINGLE STAGE FURNACE / SINGLE STAGE COOLING
Required
Figure 3
R
G
Y
W
R
G
W
Y
Y
B
24VAC HOT
COMFORT CONTROL
TERMINAL BLOCK
SINGLE STAGE AIR HANDLER W/ELECTRIC HEAT - SINGLE STAGE COOLING
SINGLE STAGE
AIR CONDITIONER
FAN
COOLING
HEATING
360 ohm
5 watt
Resistor Required
Resistor is required on Y to B
at the indoor unit low voltage
terminal block when outdoor
unit contactor coil is not directly
connected to Y or if a compressor
anti-short cycle timer has been
installed.
B
C
SINGLE STAGE
AIR HANDLER
Figure 5
R
G
Y
W
R
G
W
Y
24VAC HOT
COMFORT CONTROL
TERMINAL BLOCK
SINGLE STAGE AIR HANDLER W/ELECTRIC HEAT
(NO OUTDOOR UNIT)
FAN
COOLING
HEATING
360 ohm
5 watt
Resistors
Resistor is required on Y to B
when outdoor unit contactor
coil is not connected to Y.
B
C
SINGLE STAGE
AIR HANDLER
Required
Figure 6
R
G
Y
W
R
G
W
Y
24VAC HOT
COMFORT CONTROL
TERMINAL BLOCK
SINGLE STAGE OIL FURNACE (NO OUTDOOR UNIT)
FAN
COOLING
HEATING
360 ohm
5 watt
Resistors
Resistor is required on Y to B
when outdoor unit contactor
coil is not connected to Y.
B
C
SINGLE STAGE
OIL FURNACE
R1
T
T
R1
OIL BURNER PRIMARY
R
G
Y
W
R
G
W
Y
24VAC HOT
COMFORT CONTROL
TERMINAL BLOCK
SINGLE STAGE OIL FURNACE / SINGLE STAGE COOLING
FAN
COOLING
HEATING
Resistor is required on
Y to B at the indoor unit
low voltage terminal block
when outdoor unit contactor
coil is not directly connected
to Y or if a compressor anti-
short cycle timer has been
installed.
B
C
SINGLE STAGE
OIL FURNACE
SINGLE STAGE
AIR CONDITIONER
Y
B
T
T
R1
OIL BURNER PRIMARY
R1
Figure 7
Figure 8
