Carrier AC - Wiring Diagrams (Heat Pump & AC Models)

24 VAC HOT


24 VAC COMM


FAN


COOL/HEAT
STAGE 2

HEAT STAGE 3
R
Y/Y2
R
C
C
C
R
MODEL 2S
THERMOSTAT
FK4C
EASY SELECT
TERMINAL BOARD
TWO-SPEED
HEAT PUMP
J1 JUMPER
J2 JUMPER
See notes 4, 6, 7, 9 and 10
G
G
Y/Y2
DH
W/W1 W1
W2W2
RVS COOLING


COOL/HEAT
STAGE 1

RVS HEATING


OUTDOOR

SENSOR

CONNECTION
Y1
L
S1
S2
B
Y1
Y1
Y2
O/W2
OO
A97135
→Fig. 18—Two-Speed Heat Pump
with FK4C Fan Coil
24 VAC HOT


24 VAC COMM


HEAT STAGE 1


COOL STAGE 1


FAN
C
R
G
W/W1
Y/Y2
MODEL AC
THERMOSTAT
SPLICE
BOX
RED
BRN
WHT
YEL
GRN
See note 7
A96297
Fig. 19—Single-Speed Packaged Air Conditioner
with Single-Stage Gas Furnace (48SS, SX)
B
S1
S2
SPLICE
BOX
RED
YEL
WHT
See notes 2, 7, and 11
O/W2
HEAT STAGE 2
N/A
Y1
COOL STAGE 1
OUTDOOR

SENSOR

CONNECTION
HEATER
CONTROL BOX
GRN
BRN
BRN
24 VAC HOT


24 VAC COMM


HEAT STAGE 1


COOL STAGE 2


FAN
C
R
G
W/W1
Y/Y2
MODEL 2S
THERMOSTAT
A97136
→Fig. 20—Single-Speed Packaged Air Conditioner
with Single-Stage Electric Heat (50SS, SX, ZP)
B
S1
S2
SPLICE
BOX
YEL
WHT
PNK
See notes 2, 7, 8, and 11
O/W2
HEAT STAGE 2
N/A
Y1
COOL STAGE 1

OUTDOOR

SENSOR

CONNECTION
HEATER
CONTROL BOX
GRN
VIO
BRN
BRN
RED
RED
24 VAC HOT


24 VAC COMM


HEAT STAGE 1


COOL STAGE 2


FAN
C
R
G
W/W1
Y/Y2
MODEL 2S
THERMOSTAT
RED (TRAN)
A97137
→Fig. 21—Single-Speed Packaged Air Conditioner
with 2-Stage Electric Heat (50SS, SX, ZP)
8