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

FA, FB, FC,
OTHER FD, FF, FH
HP THERMOSTAT FAN COIL
24 VAC HOT R
24 VAC COM C
HEAT STAGE 2 W2
COOL/HEAT
Y
STAGE 1
G
INDOOR FAN
O
RVS COOLING
EMERGENCY E
* IF AVAILABLE
HEAT
OTHER
HP THERMOSTAT
24 VAC HOT R
EHR
24 VAC COM C
HEAT STAGE 2 W2
COOL/HEAT
Y
STAGE 1
EHR
G
INDOOR FAN
O
RVS COOLING
EMERGENCY
E
HEAT
EHR
* IF AVAILABLE
NOTE: Remove wires from crimp nut in indoor fan coil
when installing outdoor thermostats.
IMPORTANT: When using outdoor thermostats, W 2 must be
energized when requesting supplemental heat.
Fig. 11—Typical 24-v Circuit Connections using Other HP Thermostats with Fan Coils and No Outdoor
HEAT
PUMP
R
R
C
C
*
W2
W2
*
E
Y
*
W3
G
O
FA, FB, FC, TWO
OUTDOOR
FD, FF, FH HEAT
FAN COIL PUMP THERMOSTATS
ODT
*
W3
R
R
C C
*
W2
W2
Y
* ODT
E
G
O
Thermostat, 1 Outdoor Thermostat, or 2 Outdoor Thermostats
OTHER
HP THERMOSTAT
24 VAC HOT
24 VAC COM
HEAT STAGE 2
W2
COOL/HEAT
STAGE 1
INDOOR FAN
RVS COOLING
EMERGENCY
HEAT
NOTE: Remove wires from crimp nut in indoor fan coil
when installing outdoor thermostat.
A97374
IMPORTANT: When using outdoor thermostat, W 2 must be
energized when requesting supplemental heat.
A97404
7
FA, FB, FC,
FD, FF, FH HEAT
PUMP
FAN COIL
W3
R
R
C
C
W2
W2
Y
E
G
G
O
E
40FKA
OTHER FK4C
HP THERMOSTAT FAN COIL
DH
24 VAC HOT R
R
C
24 VAC COM
C
HEAT STAGE 2 W2
W1
COOL/HEAT
Y
STAGE 1
W2
G
INDOOR FAN
Y/Y2
G
RVS COOLING O
O
Y1
EMERGENCY E
HEAT
ONE
OUTDOOR
THERMOSTAT
ODT
R
C
Y
O
A97403
HEAT
PUMP
J1 JUMPER
R
C
W2
J2 JUMPER
Y
O
A98630