![background image](http://html1.mh-extra.com/html/carrier/38yda/38yda_installation-and-start-up-instructions-manual_2563218009.webp)
Fig. 8—Typical 24-v Circuit Connections (Continued)
N
A97495
24 VAC HOT
24 VAC COM
HEAT STAGE 3
R
C
G
R
C
Y1
C
W2
O
W3
OTHER BRAND
TWO-SPEED
THERMOSTAT
SINGLE-STAGE
FURNACE
TWO-SPEED
HEAT PUMP
G
W
R
Y2
W2
O
E
Y
Y2
L
Y1
H
R1
COOL/HEAT
STAGE 2
FAN
EMERGENCY
HEAT
RVS COOLING
COOL/HEAT
STAGE 1
See notes 11, 14, and 24
L
A98588
O/ W2
W/W1
Y1/W2
G
R
CARRIER
THERMIDISTAT
CONTROL
MODEL RH
SINGLE-STAGE
FURNACE
TWO-SPEED
HEAT PUMP
W
G
Y
C
Y2
W3
W2
R
Y1
O
C
DHUM
HUM
B
S1
S2
R
C
HEAT STAGE 3
COOL/HEAT
STAGE 2
RVS COOLING
FAN
24 VAC HOT
24 VAC COMM
N/A
HUMIDIFY
See notes 7, 11, 14, 15, 16, 17, 18 and 25
N/A
OUTDOOR
SENSOR
CONNECTION
Y/Y2
HUMIDIFIER
(24 VAC)
OUTDOOR
SENSOR
COOL/HEAT
STAGE 1
W/ W1
G
R
SINGLE-STAGE
FURNACE
TWO-SPEED
HEAT PUMP
W
G
Y
C
Y2
W2
C
L
B
S1
S2
R
R
C
HEAT STAGE 3
(FURNACE)
COOL/HEAT
STAGE 2
(COMPRESSOR HI)
FAN
24 VAC HOT
24 VAC COM
O
O/W2
RVS COOLING
RVS SENSING
N/A
OUTDOOR
SENSOR
CONNECTIONS
Y/ Y2
Y1
W3
COOL/HEAT
STAGE 1
(COMPRESSOR LO)
Y1/W2
OUTDOOR
SENSOR
See notes 7, 11, 14, 15, and 26
CARRIER
PROGRAMMABLE
DUAL FUEL
THERMOSTAT
MODEL DF
A98589
M
9