Carrier 38YKC Series - Page 8

Fig. 11—Typical 24-v Circuit Connections using Other HP Thermostats with Smart Heat
and No Outdoor Thermostat, 1 Outdoor Thermostat, or 2 Outdoor Thermostats
A97412
24 VAC HOT






R
C
Y
G
O
RVS COOLING








W2
OTHER
HP THERMOSTAT

HEAT 
PUMP


E
R
C
Y
G
O
W2T
W3
W2D
Y
0
R
C
O
W2
Y
INDOOR FAN


EMERGENCY
HEAT


COOL/HEAT
STAGE 1
24 VAC COM
HEAT STAGE 2
CUT
JW1

SHR


SHR

FA, FB, FC, FH
FAN COIL
SMART HEAT

ODT

A97410
24 VAC HOT






R
C
Y
G
O
RVS COOLING








W2
OTHER
HP THERMOSTAT

FA, FB, FC, FH
FAN COIL
SMART HEAT
HEAT 
PUMP


E
R
C
Y
G
O
W2T
W3
W2D
Y
0
R
C
O
W2
Y
INDOOR FAN


EMERGENCY
HEAT


COOL/HEAT
STAGE 1
24 VAC COM
HEAT STAGE 2
JW1
24 VAC HOT






R
C
Y
G
O
RVS COOLING








W2
OTHER
HP THERMOSTAT

FA, FB, FC, FH
FAN COIL
SMART HEAT
HEAT 
PUMP


E
R
C
Y
G
O
W2T
W3
W2D
Y
0
R
C
O
W2
Y
INDOOR FAN


EMERGENCY
HEAT


COOL/HEAT
STAGE 1
24 VAC COM
HEAT STAGE 2
CUT
JW1

ODT

A97411
8