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O/W2
W/W1
Y1/W2
G
R
THERMIDISTAT
CONTROL
MODEL RH
VARIABLE-SPEED
CONDENSING
FURNACE
TWO-SPEED
AIR CONDITIONER
W/W1
G
Y/Y2
C
Y2
R
Y1
C
DHUM
HUM
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
DEHUMIDIFY
HUMIDIFY
N/A
OUTDOOR
SENSOR
CONNECTION
Y/Y2
HUMIDIFIER
(24 VAC)
OUTDOOR
SENSOR
HUM
DEHUM
DE
JUMPER
See notes 1, 2, 3, 6, 8, 10, and 12
A01495
R
Y/Y2
R
Y2
C
C
C
R
Y1
NON-PROGRAMMABLE
THERMOSTAT
MODEL 2S
FK4C, FV4A
OR 40FK
FAN COIL
TWO-SPEED
AIR CONDITIONER
J1 JUMPER
REMOVE
J2 JUMPER
FOR HEAT
STAGING
G
G
Y/Y2
DH
W/W1 W1
Y1
O/W2
Y1
O
W2
B
S1
S2
24 VAC HOT
24 VAC COMM
FAN
COOL STAGE 2
HEAT STAGE 1
HEAT STAGE 2
COOL STAGE 1
N/A
OUTDOOR
SENSOR
CONNECTION
See notes 1, 2, 3, 4, and 7
A01496
O/W2
W/W1
Y1 / W2
G
R
THERMIDISTAT
CONTROL
MODEL RH
SINGLE-STAGE
FURNACE
TWO-SPEED
AIR CONDITIONER
W
G
Y
C
Y2
R
Y1
C
DHUM
HUM
B
S1
S2
R
C
HEAT STAGE 1
COOL STAGE 2
COOL STAGE 1
N/A
FAN
24 VAC HOT
24 VAC COMM
N/A
HUMIDIFY
N/A
OUTDOOR
SENSOR
CONNECTION
Y/Y2
HUMIDIFIER
(24 VAC)
OUTDOOR
SENSOR
See notes 1, 2, 3, 6, and 8
A01497
O/W2
W/W1
Y1/W2
G
R
THERMIDISTAT
CONTROL
MODEL RH
TWO-STAGE
FURNACE
WITH PSC
BLOWER MOTOR
TWO-SPEED
AIR CONDITIONER
W/W1
G
Y/Y2
C
Y2
R
Y1
C
DHUM
HUM
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
HUMIDIFY
N/A
OUTDOOR
SENSOR
CONNECTION
Y/Y2
HUMIDIFIER
(24 VAC)
OUTDOOR
SENSOR
See notes 1, 2, 3, 6, 8, and 10
A01498
O/W2
W/W1
Y1/W2
G
R
THERMIDISTAT
CONTROL
MODEL RH
FURNACE
BOARD
AFS
BOARD
TWO-SPEED
AIR CONDITIONER
VARIABLE SPEED
80% NON-CONDENSING FURNACE
W/W1
G
Y/Y2
C
Y2
Y1
C
DHUM
HUM
B
S1
S2
R
W2
O
Y1
R
COM
HUM
PL9-10
DEHUM
HEAT STAGE 1
COOL STAGE 2
COOL STAGE 1
HEAT STAGE 2
FAN
24 VAC HOT
24 VAC COM
DEHUMIDIFY
HUMIDIFY
N/A
OUTDOOR
SENSOR
CONNECTIONS
Y/Y2
HUMIDIFIER
(24 VAC)
OUTDOOR
SENSOR
See notes 1, 2, 3, 6, 8, 10, and 11
A01499
24 VAC HOT
24 VAC COMM
HEAT STAGE 1
COOL STAGE 2
FAN
R
C
G
W/W1
Y/Y2
R
C
N/A
COOL STAGE 1
N/A
OUTDOOR
SENSOR
CONNECTION
Y1
B
S1
S2
C
NON-PROGRAMMABLE
THERMOSTAT
MODEL 2S
SINGLE-STAGE
FURNACE
TWO-SPEED
AIR CONDITIONER
G
O/W2
W
R
Y
Y2
Y1
See notes 1, 2, 3, and 5
A01500
Fig. 11—Typical 24V Wiring Diagram
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