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Fig. 10—Typical 24-v Circuit Connections
A94386
C
G
R
C
O/W2
Y/Y2
W/W1
G
R
24 VAC HOT
INDOOR FAN
HEAT STAGE 1
COOL STAGE 1
NOT USED
NOT USED
CORPORATE
PROGRAMMABLE
THERMOSTAT
MODEL AC
SEE
NOTE 2
24 VAC COM
NOT USED
NOT USED
OPTIONAL
OUTDOOR
SENSOR
CONNECTION
Y1/W2
S2
S1
L
B
C
AIR
CONDITIONER
SINGLE
STAGE
FURNACE
Y/Y2
W/W1
A94384
G
W/W1
C
R
C
G
Y/Y2
W/W1
C
R
24 VAC HOT
24 VAC COM
HEAT STAGE 1
COOL STAGE 1
INDOOR FAN
CORPORATE
NON-PROGRAMMABLE
THERMOSTAT
MODEL AC
AIR
CONDITIONER
SEE
NOTE 2
Y/Y2
SINGLE
STAGE
FURNACE
A94387
FAN COIL
C
O/W2
Y/Y2
W/W1
G
R
24 VAC HOT
INDOOR FAN
HEAT STAGE 1
COOL STAGE 1
NOT USED
NOT USED
CORPORATE
PROGRAMMABLE
THERMOSTAT
MODEL AC
AIR
CONDITIONER
SEE
NOTE 2
24 VAC COM
NOT USED
NOT USED
OPTIONAL
OUTDOOR
SENSOR
CONNECTION
Y1/W2
S2
S1
L
B
C
C
W2
G
R
FD, FF
FA, FB, FC,
A94385
G
W2
C
R
FAN COIL
C
G
Y/Y2
W/W1
C
R
24 VAC HOT
24 VAC COM
HEAT STAGE 1
COOL STAGE 1
INDOOR FAN
AIR
CONDITIONER
SEE
NOTE 2
FA, FB, FC,
FD, FF
CORPORATE
NON-PROGRAMMABLE
THERMOSTAT
MODEL AC
6