Table 6—Wiring Diagram Reference Chart
EQUIPMENT
SELECTION
1-SPEED
AC
2-SPEED
AC
1-SPEED
HP
2-SPEED
HP
1-Stage
Furnace
Fig. 15
Fig. 16
Fig. 17
Fig. 18
2-Stage
Furnace
Fig. 19
Fig. 20
Fig. 21
Fig. 22
Variable-Speed Non-Condensing Furnace
Fig. 23
Fig. 24
Fig. 25
Fig. 26
Variable-Speed 2-Stage Condensing Furnace
Variable-W/O DE Connection
Fig. 27
Fig. 28
Fig. 29
Fig. 30
Variable-Speed 2-Stage Condensing Furnace
with DE Connection
31
32
33
34
Typical Fan Coil
Fig. 35
Fig. 36
Fig. 37
Fig. 38
FK4C Fan Coil
Fig. 39
Fig. 40
Fig. 41
Fig. 42
Fig. 17—Single-Stage Furnace
with 1-Speed Heat Pump (Dual Fuel)
A98091
C
O
R
W2
C
R
Y
W
G
Y
SINGLE-STAGE
FURNACE
SINGLE-
SPEED HEAT
PUMP
EQUIPMENT
CONTROLLER
O
B
RH
RC
DEF
DHUM
HUM
W2
W1
G
Y2
Y1
N/A
HEAT STAGE 2
FAN
N/A
COOL/HEAT STAGE 1
N/A
RVS COOLING
DEFROST
N/A
HUMIDIFY
24 VAC HOT
See notes 1, 2, 3, 6, 10, 11, and 19
HUMIDIFIER
(24 VAC)
Fig. 15—1-Stage Furnace with 1-Speed Air
Conditioner
A98089
C
C
R
Y
W
G
Y
N/A
SINGLE-STAGE
FURNACE
SINGLE-
SPEED AIR
CONDITIONER
EQUIPMENT
CONTROLLER
N/A
24 VAC HOT
N/A
N/A
HUMIDIFY
O
B
RH
RC
W2
W1
G
Y2
Y1
DEF
DHUM
HUM
HUMIDIFIER
(24 VAC)
N/A
HEAT STAGE 1
FAN
N/A
COOL STAGE 1
See note 19
Fig. 18—1-Stage Furnace with
2-Speed Heat Pump (Dual Fuel)
A98092
TWO-
SPEED HEAT
PUMP
C
O
R
W2
Y2
W3
C
R
Y1
W
G
Y
O
B
RH
SINGLE-STAGE
FURNACE
EQUIPMENT
CONTROLLER
RC
DEF
DHUM
HUM
W2
W1
G
Y2
Y1
N/A
N/A
N/A
HEAT STAGE 3
FAN
DEFROST
HUMIDIFY
RVS COOLING
24 VAC HOT
COOL/HEAT STAGE 2
COOL/HEAT STAGE 1
See notes 1, 2, 3, 4, 6, 7, 8, 9, 10, 11, and 19
HUMIDIFIER
(24 VAC)
Fig. 16—1-Stage Furnace with
2-Speed Air Conditioner
A98090
C
C
R
Y1
Y2
W
G
Y
SINGLE-STAGE
FURNACE
TWO-
SPEED AIR
CONDITIONER
EQUIPMENT
CONTROLLER
O
B
RH
RC
W2
W1
G
Y2
Y1
N/A
HEAT STAGE 1
FAN
N/A
24 VAC HOT
N/A
COOL STAGE 2
COOL STAGE 1
See notes 4 and 19
R
N/A
N/A
HUMIDIFY
DEF
DHUM
HUM
HUMIDIFIER
(24 VAC)
21