Carrier Non-Programmable Thermostats - Two-Speed Heat Pump with Variable-Speed (FK4 C, FV4 A, 40 FKA) Fan Coil; Single-Speed Packaged Air Conditioner with Single-Speed Electric Heat (50 SS, SX, ZP); Single-Speed Packaged Air Conditioner with Single-Stage Gas Furnace (48 SS, SX); Single-Speed Packaged Air Conditioner with 2-Stage Electric Heat (50 SS, SX, ZP)

→ Fig. 20—Single-Speed Packaged Air Conditioner
with Single-Speed Electric Heat (50SS, SX, ZP)
A98470
SPLICE
BOX
RED
YEL
WHT
See notes 8 and 12
HEATER
CONTROL BOX
GRN
BRN
BRN
24 VAC HOT


24 VAC COMM


HEAT STAGE 1


COOL STAGE 1


FAN
C
R
G
W/W1
Y/Y2
MODEL AC
THERMOSTAT
→ Fig. 18—Two-Speed Heat Pump with
Variable-Speed (FK4C, FV4A, 40FKA) Fan Coil
A98467
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
EASY SELECT
TERMINAL BOARD
TWO-SPEED
HEAT PUMP
J1 JUMPER
J2 JUMPER
See notes 5, 7, 8, 10, and 11
G
G
Y/Y2
DH
W/W1 W1
W2W2
RVS COOLING


COOL/HEAT
STAGE 1

N/A


OUTDOOR

SENSOR

CONNECTION
Y1
S1
S2
B
Y1
Y1
Y2
O/W2
OO
→Fig. 21—Single-Speed Packaged Air Conditioner
with 2-Stage Electric Heat (50SS, SX, ZP)
A98471
B
S1
S2
SPLICE
BOX
YEL
WHT
PNK
See notes 2, 8, 9, and 12
O/W2
HEAT STAGE 2
N/A
Y1
N/A

OUTDOOR

SENSOR

CONNECTION
HEATER
CONTROL BOX
GRN
VIO
BRN
BRN
RED
RED
24 VAC HOT


24 VAC COMM


HEAT STAGE 1


COOL STAGE 1


FAN
C
R
G
W/W1
Y/Y2
MODEL HP
THERMOSTAT
RED (TRAN)
→ Fig. 19—Single-Speed Packaged Air Conditioner
with Single-Stage Gas Furnace (48SS, SX)
A98469
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 8
9