Carrier 38YXA - Page 10

Fig. 17—Typical 24-v Circuit Connections using Carrier Model HP Thermostat with Smart Heat and No Outdoor
Thermostat, 1 Outdoor Thermostat, or Supplemental Heat Relay
A97568
24 VAC HOT






R
G
W/W1
Y/Y2
O/W2
RVS COOLING








C
B
S1
S2
SUPPLEMENTAL
HEATING
RELAY
CARRIER
PROGRAMMABLE
THERMOSTAT
MODEL HP
FA, FB, FX
FAN COIL WITH
SMART HEAT
HEAT 
PUMP


Y1/W2
L
R
C
Y
G
O
W2T
W3
W2D
Y
0
R
C
O
W2
Y
INDOOR FAN


HEAT STAGE 2


COOL/HEAT
STAGE 1
NOT USED
24 VAC COM
NOT USED

TROUBLE
OPTIONAL
OUTDOOR
SENSOR
CONNECTION
CUT
JW1

SHR


SHR



ODT

A97566
24 VAC HOT






R
G
W/W1
Y/Y2
O/W2
RVS COOLING








C
B
S1
S2
CARRIER
PROGRAMMABLE
THERMOSTAT
MODEL HP
FA, FB, FX
FAN COIL WITH
SMART HEAT
HEAT 
PUMP


Y1/W2
L
R
C
Y
G
O
W2T
W3
W2D
Y
0
R
C
O
W2
Y
INDOOR FAN


HEAT STAGE 2


COOL/HEAT
STAGE 1
NOT USED
24 VAC COM
NOT USED

TROUBLE
OPTIONAL
OUTDOOR
SENSOR
CONNECTION
JW1
24 VAC HOT






R
G
W/W1
Y/Y2
O/W2
RVS COOLING








C
B
S1
S2
CARRIER
PROGRAMMABLE
THERMOSTAT
MODEL HP
ONE
OUTDOOR
THERMOSTAT
HEAT 
PUMP


Y1/W2
L
R
C
Y
G
O
W2T
W3
W2D
Y
0
R
C
O
W2
Y
INDOOR FAN


HEAT STAGE 2


COOL/HEAT
STAGE 1
NOT USED
24 VAC COM
NOT USED

TROUBLE
OPTIONAL
OUTDOOR
SENSOR
CONNECTION
CUT
JW1

ODT

FA, FB, FX
FAN COIL WITH
SMART HEAT
A97567
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