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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
OUTDOOR
SENSOR
CONNECTION
C
B
S1
S2
C C
R
PROGRAMMABLE
THERMOSTAT
MODEL 2S
FK4C, FV4A
OR 40FK
FAN COIL
J1
JUMPER
REMOVE
J2 JUMPER
FOR HEAT
STAGING
TWO-SPEED
AIR CONDITIONER
DH
Y1
Y1
W/W1
O/W2
Y1/W2
W1
Y/Y2
Y2Y/Y2
O
W2
See notes 1, 2, 3, 5, and 7
A01493
O/W2
W/W1
Y1/W2
G
R
PROGRAMMABLE
THERMOSTAT
MODEL 2S
VARIABLE-SPEED
CONDENSING
FURNACE
TWO-SPEED
AIR CONDITIONER
W/W1
G
Y/Y2
C
Y2
R
Y1
C
B
S1
S2
W2
R
C
HEAT STAGE 1
COOL STAGE 1
COOL STAGE 2
HEAT STAGE 2
FAN
24 VAC HOT
24 VAC COMM
N/A
OUTDOOR
SENSOR
CONNECTION
Y/Y2
HUM
DEHUM
DE
JUMPER
See notes 1, 2, 3, and 5
A01507
Fig. 11—Typical 24V Wiring Diagram (Cont)
O/W2
W/W1
Y1/W2
G
R
W2
W1
THERMIDISTAT
CONTROL
MODEL RH
FK4C, FV4A
OR 40FK
FAN COIL
TWO-SPEED
AIR CONDITIONER
Y1
G
C
Y2
R
Y1
C
DHUM
HUM
B
S1
S2
Y/Y2
R
O
C
DH
HEAT STAGE 2
HEAT STAGE 1
COOL STAGE 1
COOL STAGE 2
FAN
24 VAC HOT
24 VAC COMM
DEHUMIDIFY
HUMIDIFY
N/A
OUTDOOR
SENSOR
CONNECTION
Y/Y2
HUMIDIFIER
(24 VAC)
OUTDOOR
SENSOR
REMOVE J2 JUMPER
FOR HEAT STAGING
REMOVE
J1 JUMPER
See notes 1, 2, 3, 6, 7, 8, and 9
A01494
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