Carrier 38YRA Installation And Start-Up Instructions Manual page 7

CORPORATE
NON-PROGRAMMABLE
THERMOSTAT
MODEL HP
24 VAC HOT
R
24 VAC COM
C
HEAT STAGE 2
W/W1
COOL/HEAT
Y/Y2
STAGE 1
G
INDOOR FAN
RVS COOLING
O/W2
NOT USED
Y1
NOT USED
B
TROUBLE L
OPTIONAL
S1
OUTDOOR
SENSOR S2
CONNECTION
CORPORATE
NON-PROGRAMMABLE
THERMOSTAT
FK4C
MODEL HP
FAN COIL
24 VAC HOT
R R
24 VAC COM
C
HEAT STAGE 2
W/W1
W1
COOL/HEAT
Y/Y2
Y/Y2
STAGE 1
G
INDOOR FAN
W2
RVS COOLING
O/W2
NOT USED
Y1
NOT USED
B
TROUBLE L
OPTIONAL
S1
OUTDOOR
SENSOR
S2
CONNECTION
FK4B
HEAT
FAN COIL PUMP
R R
C
C
W2
W2
Y/Y2 Y
G
W3
O O
Y1
E
L
A94392
HEAT
PUMP
R
C
C
W2
Y
G
O O
Y1
A95330
Fig. 9—Typical 24-v Circuit Connections (continued)
CORPORATE
PROGRAMMABLE
THERMOSTAT
MODEL HP
24 VAC HOT
INDOOR FAN
HEAT STAGE 2
COOL/HEAT
STAGE 1
RVS COOLING
NOT USED
24 VAC COM
NOT USED
TROUBLE
OPTIONAL
OUTDOOR
SENSOR
CONNECTION
CORPORATE
PROGRAMMABLE
THERMOSTAT
MODEL HP
24 VAC HOT
INDOOR FAN
HEAT STAGE 2
COOL/HEAT
STAGE 1
RVS COOLING
NOT USED
24 VAC COM
NOT USED
TROUBLE
OPTIONAL
OUTDOOR
SENSOR
CONNECTION
7
FK4B
HEAT
FAN COIL PUMP
R R
R
G G
W2
W/W1
W2
Y/Y2
Y/Y2 Y
O/W2 O
O
Y1/W2
W3
C
C C
E
B
L
L
S1
S2
A94393
FK4C
HEAT
FAN COIL PUMP
R
R
G G
W/W1
W1
Y/Y2 Y/Y2
O/W2 O
Y1/W2
W2
C
C
B
L
S1
S2
A95331
R
W2
Y
O
C