Fig. 8—Typical 24-v Circuit Connections (Continued)
Z
A98598
O/W2
W/W1
Y1/W2
G
R
VARIABLE-SPEED
CONDENSING
FURNACE
TWO-SPEED
HEAT PUMP
W/W1
G
Y/Y2
C
Y2
R
Y1
W2
O
C
DHUM
HUM
B
S1
S2
W2
R
C
HEAT STAGE 3
COOL/HEAT
STAGE 1
COOL/HEAT
STAGE 2
RVS COOLING
FAN
24 VAC HOT
24 VAC COMM
DEHUMIDIFY
HUMIDIFY
N/A
OUTDOOR
SENSOR
CONNECTION
Y/Y2
HUMIDIFIER
(24 VAC)
OUTDOOR
SENSOR
See notes 7, 11, 12, 14, 15, 16, 17,
18, 19, 22, and 25
DH
HUM
CARRIER
THERMIDISTAT
CONTROL
MODEL RH
X
A98596
O/W2
W/ W1
Y1/W2
G
R
FURNACE
BOARD
AFS
BOARD
TWO-SPEED
HEAT PUMP
VARIABLE SPEED 80%
NON-CONDENSING FURNACE
W/W1
G
Y/Y2
C
Y2
W3
W2
O
C
DHUM
HUM
B
S1
S2
R
W2
O
Y1
R
COM
HUM
PL9-10
DEHUM
HEAT STAGE 3
HEAT/COOL
STAGE 1
HEAT/COOL
STAGE 2
RVS COOLING
FAN
24 VAC HOT
24 VAC COM
DEHUMIDIFY
HUMIDIFY
N/A
OUTDOOR
SENSOR
CONNECTIONS
Y/ Y2
HUMIDIFIER
(24 VAC)
OUTDOOR
SENSOR
See notes 7, 11, 12, 14, 15, 16, 17,
18, 20, 21, and 25
Y1
CARRIER
THERMIDISTAT
CONTROL
MODEL RH
O/W2
W/ W1
Y1/W2
G
R
FURNACE
BOARD
AFS
BOARD
TWO-SPEED
HEAT PUMP
VARIABLE SPEED 80%
NON-CONDENSING FURNACE
W/W1
G
Y/Y2
C
Y2
W3
W2
O
C
L
B
S1
S2
R
W2
O
Y1
R
COM
HUM
PL9-10
DEHUM
HEAT STAGE 3
(FURNACE)
COOL/HEAT
STAGE 1
(COMPRESSOR LO)
COOL/HEAT
STAGE 2
(COMPRESSOR HI)
RVS COOLING
FAN
24 VAC HOT
24 VAC COMM
RVS SENSING
N/A
OUTDOOR
SENSOR
CONNECTIONS
Y/ Y2
OUTDOOR
SENSOR
See notes 7, 11, 12, 14, 15, 21, and 26
Y1
CARRIER
PROGRAMMABLE
DUAL FUEL
THERMOSTAT
MODEL DF
A98597
Y
12
