Carrier 38YXA - Page 11

Fig. 18—Typical 24-v Circuit Connections using Other HP Thermostats with Smart Heat and No Outdoor
Thermostat, 1 Outdoor Thermostat, or Supplemental Heat Relay
A97583
24 VAC HOT






R
C
Y
G
O
RVS COOLING








W2
OTHER BRAND
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, FX
FAN COIL WITH
SMART HEAT

ODT

A97581
24 VAC HOT






R
C
Y
G
O
RVS COOLING








W2
OTHER BRAND
HP THERMOSTAT

FA, FB, FX
FAN COIL WITH
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 BRAND
HP THERMOSTAT

FA, FB, FX
FAN COIL WITH
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

A97582
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