Carrier 38EYA Installation And Start-Up Instructions Manual page 8

OTHER BRAND FA, FB, FX
HP THERMOSTAT
FAN COIL
24 VAC HOT R
C
24 VAC COM
HEAT STAGE 2 W2
COOL/HEAT
Y
STAGE 1
G
INDOOR FAN
O
RVS COOLING
EMERGENCY
E
*
IF AVAILABLE
HEAT
OTHER BRAND
HP THERMOSTAT
24 VAC HOT R
EHR
C
24 VAC COM
W2
HEAT STAGE 2
COOL/HEAT
Y
STAGE 1
EHR
G
INDOOR FAN
RVS COOLING O
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. 13—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
TWO
FA, FB, FX OUTDOOR
HEAT
FAN COIL PUMP THERMOSTATS
ODT
*
W3
R
R
C C
*
W2
W2
Y
*
ODT
E
G
O
Thermostat or 2 Outdoor Thermostats
OTHER BRAND
HP THERMOSTAT
24 VAC HOT
24 VAC COM
HEAT STAGE 2
COOL/HEAT
STAGE 1
INDOOR FAN
RVS COOLING
EMERGENCY
HEAT
NOTE: Remove wires from crimp nut in indoor fan coil
A97577
when installing outdoor thermostat.
IMPORTANT: When using outdoor thermostat, W 2 must be
energized when requesting supplemental heat.
A97579
8
FA, FB, FX HEAT
FAN COIL PUMP
W3
R
R
C
C
W2
W2
Y
E
G
G
O
E
OTHER BRAND FV4A
HP THERMOSTAT FAN COIL
24 VAC HOT R
C
24 VAC COM
HEAT STAGE 2 W2
COOL/HEAT
Y
STAGE 1
INDOOR FAN G
Y/Y2
O
RVS COOLING
EMERGENCY E
HEAT
ONE
OUTDOOR
THERMOSTAT
ODT
R
C
W2
Y
O
A97578
HEAT
PUMP
DH J1 JUMPER
R
R
C
C
W1 W2
J2 JUMPER
W2
Y
G
O
O
Y1
A97580