Carrier 38CKC - Page 8

Fig. 8—Typical 24-v Circuit Connections
A97367
24 VAC HOT






R
W
Y
G
R
W
Y
OTHER
NON-PROGRAMMABLE
AC THERMOSTAT

SINGLE-STAGE
FURNACE
AIR
CONDITIONER

C
INDOOR FAN


HEAT STAGE 1


COOL STAGE 1

C
SEE 
NOTE 2

G
A97469
24 VAC HOT






R
G
W/W1
Y/Y2
O/W2
R
W
Y
C
B
S1
S2
CARRIER
PROGRAMMABLE
THERMOSTAT
MODEL AC
SINGLE-STAGE
FURNACE
AIR
CONDITIONER

G
Y1/ W 2
L
INDOOR FAN


HEAT STAGE 1


COOL STAGE 1
NOT USED
24 VAC COM
NOT USED

NOT USED

NOT USED

OPTIONAL
OUTDOOR
SENSOR
CONNECTION
C
C
SEE 
NOTE 2
A97467
24 VAC HOT


24 VAC COM







R
C
G
W/W1
Y/Y2
R
C
C
CARRIER
NON-PROGRAMMABLE
THERMOSTAT
MODEL AC
SINGLE-STAGE
FURNACE

AIR 
CONDITIONER
SEE 
NOTE 2
Y
G
W
HEAT STAGE 1

COOL STAGE 1

INDOOR FAN
A97366
24 VAC HOT









R
G
W
Y
R
C
C
OTHER
NON-PROGRAMMABLE
AC THERMOSTAT

FA, FB, FC, 
FD, FF
FAN COIL

AIR 
CONDITIONER
SEE 
NOTE 2
G
W2
HEAT STAGE 1

COOL STAGE 1

INDOOR FAN
A97470
24 VAC HOT






R
G
W/W1
Y/Y2
O/W2
R
W2
C
B
S1
S2
CARRIER
PROGRAMMABLE
THERMOSTAT
MODEL AC
FA, FB, 
FC, FD, FF
FAN COIL
AIR
CONDITIONER

G
Y1/W2
L

INDOOR FAN


HEAT STAGE 1


COOL STAGE 1
NOT USED
24 VAC COM
NOT USED

NOT USED

NOT USED

OPTIONAL
OUTDOOR
SENSOR
CONNECTION
C
C
SEE 
NOTE 2
A97468
24 VAC HOT


24 VAC COM







R
C
G
W/W1
Y/Y2
R
C
C
CARRIER
NON-PROGRAMMABLE
THERMOSTAT
MODEL AC
FA, FB, FC, 
FD, FF
FAN COIL

AIR 
CONDITIONER
SEE 
NOTE 2
G
W2
HEAT STAGE 1

COOL STAGE 1

INDOOR FAN
8