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TWO STAGE COOLING
SPLIT COIL VARIABLE SPEED AIR HANDLER
BK DISABLED
NOTE: Two additional wires are required for Outdoor Temperature Sensor.
VS AIR HANDLER
COMFORT CONTROL
& ELECTRIC HEAT
Y2
COOLING-2nd
W3
HEATING -3rd
24VAC HOT
R
HEATING -2nd W2
HEATING -1st
W1
Y/
COOLING -1st
Y1
G
FAN
O
B
24VAC
common
BK
Figure CL-5
SINGLE STAGE COOLING
NON-VARIABLE SPEED INDOOR
BK DISABLED
NOTE: Two additional wires are required for Outdoor Temperature Sensor.
NOTE: See Fig. OIL-1 for external relay connections for oil furnaces.
ONE OR TWO STAGE
GAS FURNACE or
COMFORT CONTROL
AIR HANDLER &
ELECTRIC HEAT
Y2
HEATING -3rd
W3
24VAC HOT
R
HEATING -2nd W2
W1
HEATING -1st
Y/
COOLING -1st
Y1
G
FAN
O
B
24VAC
common
BK
Figure CL-7
10
TWO SEPARATE
AIR CONDITIONERS
Y/
Y
Y2
W3
R
B
W2
SECOND
STAGE
W1
Y1/
Y
Y
LO
G
O
B
B
BK
FIRST
STAGE
W3
R
SINGLE STAGE
W2
AIR CONDITIONER
W/
W1
Y
Y
G
B
B
C
Installer's Guide
SINGLE STAGE COOLING
VARIABLE SPEED INDOOR
BK DISABLED
NOTE: See Fig. OIL-1 for external relay connections for oil furnaces.
NOTE: Two additional wires are required for Outdoor Temperature Sensor.
TWO STAGE VS
GAS FURNACE or
VS AIR HANDLER
COMFORT CONTROL
& ELECTRIC HEAT
Y2
W3
HEATING -3rd
24VAC HOT
R
HEATING -2nd W2
W1
HEATING -1st
Y/
COOLING -1st
Y1
G
FAN
O
B
24VAC
common
BK
Figure CL-6
SINGLE STAGE COOLING
SINGLE STAGE OIL FURNACE
BK DISABLED
NOTE: Two additional wires are required for Outdoor Temperature Sensor.
NOTE: BT (Bonnet Thermostat) model THT1248 (BAYSEN03ATEMPAA)
required for dual fuel, oil furnace applications.
COMFORT CONTROL
SINGLE STAGE
OIL FURNACE
Y2
W3
24VAC HOT
R
W2
BT
HEATING
W1
Y/
COOLING
Y1
G
FAN
O
B
24VAC
common
BK
Figure OIL-1
SINGLE STAGE
AIR CONDITIONER
Y1/
Y
LO
W3
R
W2
W1
Y/
Y
Y2
G
O
B
B
C
BK
W3
R
SINGLE STAGE
W2
AIR CONDITIONER
R1
W
Y
Y
G
B
B
C
R1
Pub. No. 11-HD03D3-3
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