Fig. 8—Typical 24-v Circuit Connections
C
A98582
O/W2
Y1/W2
W/W1
G
R
E
W3
TYPICAL
FAN COIL
TWO-SPEED
HEAT PUMP
W2
G
C
W2
Y2
W3
R
L
O
Y1
C
DHUM
HUM
B
S1
S2
R
C
RVS COOLING
HEAT STAGE 3
COOL/HEAT
STAGE 2
COOL/HEAT
STAGE 1
FAN
24 VAC HOT
24 VAC COMM
N/A
HUMIDIFY
N/A
OUTDOOR
SENSOR
CONNECTION
Y/Y2
HUMIDIFIER
(24 VAC)
OUTDOOR
SENSOR
See notes 7, 8, 11, 16, and 17
CARRIER
THERMIDISTAT
CONTROL
MODEL RH
A98580
HEAT STAGE 3
RVS COOLING
FAN
O/W2
W/W1
Y1/W2
E
W3
24 VAC COMM
N/A
OUTDOOR
SENSOR
CONNECTION
C
G
R
B
S1
S2
C
Y1
C
Y2
CARRIER
PROGRAMMABLE
THERMOSTAT
MODEL 2S
TYPICAL
FAN COIL
TWO-SPEED
HEAT PUMP
See notes 7, 8, 9, and 11
W2
G
W2
O
R
W3
R
L
H
R1
COOL/HEAT
STAGE 1
COOL/HEAT
STAGE 2
24 VAC HOT
Y/Y2
A
D
A97498
R
C
C
Y1
W3
O
TYPICAL
FAN COIL
TWO-SPEED
HEAT PUMP
See notes 8 and 11
W3
G
W2
R
E
Y2
L
H
R1
24 VAC HOT
24 VAC COM
HEAT STAGE 3
R
C
G
W2
Y2
Y1
OTHER BRAND
TWO-SPEED
THERMOSTAT
COOL/HEAT
STAGE 1
W2
COOL/HEAT
STAGE 2
FAN
O
E
EMERGENCY
HEAT
RVS COOLING
A98581
HEAT STAGE 3
R
C
G
W/W1
Y/Y2
R
C
RVS COOLING
RVS HEATING
Y1
B
S1
S2
Y1
Y2
O
CARRIER
NON-PROGRAMMABLE
THERMOSTAT
MODEL 2S
TYPICAL
FAN COIL
TWO-SPEED
HEAT PUMP
See notes 7, 8, 10, and 11
G
O/W2
W2
W2
R
C
E
W3
W3
L
H
R1
COOL/HEAT
STAGE 2
FAN
COOL/HEAT
STAGE 1
OUTDOOR
SENSOR
CONNECTION
24 VAC HOT
24 VAC COMM
B
6