Fig. 8—Typical 24-v Circuit Connections (Continued)
R
A98592
O/W2
W/ W1
Y1/W2
G
R
TWO-STAGE
FURNACE
WITH PSC
BLOWER MOTOR
TWO-SPEED
HEAT PUMP
W/W1
G
Y/Y2
C
Y2
W2
R
Y1
O
C
DHUM
HUM
B
S1
S2
Y1
*
W2
R
C
HEAT STAGE 3
COOL/HEAT
STAGE 1
COOL/HEAT
STAGE 2
RVS COOLING
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, 11, 12, 14, 15, 16,
17, 18, 21, and 25
CARRIER
THERMIDISTAT
CONTROL
MODEL RH
A98590
G
C
Y2
C
TWO-STAGE
FURNACE WITH PSC
BLOWER MOTOR
TWO-SPEED
HEAT PUMP
See notes 6, 7, 9, 11, 12,
14, 21, and 24
R
Y1
R
O
W2
L
W3
W/W1
Y/Y2
W2
Y1 *
COOL/HEAT
STAGE 1
R
W/W1
Y/Y2
O/W2
Y1/W2
24 VAC COMM
N/A
OUTDOOR
SENSOR
CONNECTION
C
B
S1
S2
CARRIER
PROGRAMMABLE
THERMOSTAT
MODEL 2S
G
H
R1
FAN
HEAT STAGE 3
COOL/HEAT
STAGE 2
RVS COOLING
24 VAC HOT
P
A97497
24 VAC HOT
24 VAC COM
HEAT STAGE 3
R
C
G
W2
Y2
E
O
R
C
Y1
C
W2
OTHER BRAND
TWO-SPEED
THERMOSTAT
TWO-STAGE
FURNACE WITH PSC
BLOWER MOTOR
TWO-SPEED
HEAT PUMP
See notes 6, 11, 12, 14, 21, and 24
G
R
Y2
W3
L
W/W1
Y/Y2
W2
Y1
O
Y1
*
H
R1
COOL/HEAT
STAGE 2
FAN
EMERGENCY
HEAT
RVS COOLING
COOL/HEAT
STAGE 1
A98591
24 VAC HOT
24 VAC COMM
HEAT STAGE 3
R
C
G
W/W1
Y/Y2
R
C
RVS COOLING
Y1
B
S1
S2
C
W2
O
W3
CARRIER
NON-PROGRAMMABLE
THERMOSTAT
MODEL 2S
TWO-STAGE
FURNACE WITH PSC
BLOWER MOTOR
TWO-SPEED
HEAT PUMP
See notes 6, 7, 10, 11, 12,
14, 21, and 24
G
O/W2
R
Y2
L
W/W1
Y/Y2
W2
Y1
Y1
*
H
R1
COOL/HEAT
STAGE 2
FAN
COOL/HEAT
STAGE 1
N/A
OUTDOOR
SENSOR
CONNECTION
Q
S
10