Carrier Programmable Thermostats - Page 8

24 VAC HOT


FAN


COOL STAGE 1


COOL STAGE 2


HEAT STAGE 1


HEAT STAGE 2
R
G
R
G
24 VAC COMM


N/A


TROUBLE


OUTDOOR

SENSOR

CONNECTION
C
B
L
S1
S2
C C
L
R
MODEL 2S
THERMOSTAT
FK4C
EASY SELECT
TERMINAL BOARD
J1
JUMPER
REMOVE
J2 JUMPER
FOR HEAT
STAGING
TWO-SPEED
AIR CONDITIONER
See notes 2 and 7
DH
Y1
Y1
W/W1
O/W2
Y1/W2
W1
Y/Y2
Y2Y/Y2
O
W2
A96355
→Fig. 17—Two-Speed Air Conditioner
with FK4C Fan Coil—Model 2S Thermostat
24 VAC HOT


FAN


COOL/HEAT
STAGE 1

RVS COOLING


COOL/HEAT
STAGE 2

HEAT STAGE 3
R
R
24 VAC COMM


RVS HEATING


TROUBLE


OUTDOOR

SENSOR

CONNECTION
C
B
L
S1
S2
C
G G
C
W2
W3
O
Y1
R
MODEL 2S
THERMOSTAT
FK4C
EASY SELECT
TERMINAL BLOCK
J1 JUMPER
J2 JUMPER
TWO-SPEED
HEAT PUMP
See notes 3, 7, 8, and 10
DH
Y1
O
Y1/W2
Y/Y2 Y2Y/Y2
O/W2
W/W1 W1
W2
A96356
→Fig. 18—Two-Speed Heat Pump
with FK4C Fan Coil—Model 2S Thermostat
24 VAC HOT


FAN


HEAT STAGE 1


COOL STAGE 1


N/A


N/A
R
G
W/W1
Y/Y2
Y1/W2
O/W2
B
S1
S2
MODEL AC
THERMOSTAT
RED
GRN
WHT
YEL
BRN
See notes 1 and 10
L
C
24 VAC COMM
N/A
TROUBLE

OUTDOOR

SENSOR

CONNECTION
SPLICE
BOX
A96291
→Fig. 19—Single-Speed Packaged Air Conditioner
with Single-Stage Gas Furnace (48SS, SX)
COOL STAGE 1


FAN


HEAT STAGE 1


COOL STAGE 2


N/A


24 VAC HOT

R
G
W/W1
Y/Y2
O/W2
B
S1
S2
MODEL 2S
THERMOSTAT
SPLICE
BOX
YEL
GRN
WHT
BRN
WHT
BRN
See notes 2, 10, and 11
L
C
Y1/W2
24 VAC COMM
N/A
TROUBLE

OUTDOOR

SENSOR

CONNECTION
HEATER
CONTROL BOX
RED
A96292
→Fig. 20—Single-Speed Packaged Air Conditioner
with Single-Stage Electric Heat (50SS, SX, ZP)
8