33
Figure 23. Two-Stage Furnace Control Board
11
4
1
8
7
10
5
2
9
3
12
6
LINE- N
XMFR-N
LINE
LINE
XMFR
EA
C
HUM
LINE- N
1
4
3
2
5
R
C
Y/Y2
W2
G
W1
Y1
GREEN
NONE
SHORT
LONG
EXPANSION
PORT
FOR WIRING TO THE
MOTOR CONTROL
BOARD
60
RED
ST
A
TUS
90
120
180
YELLOW
AUTO
STAGE
BLOWER
OFF
DELAY
THERMOSTAT CONNECTIONS
NEUTRALS
(FLAME)
FUSE
INPUTS
Figure 22. Two-Stage Variable Speed
Motor Control Board
GROUND
SENSOR
DHUM_IN
Y1_IN
H_OUT
L2-OUT
L2-IN
L1-IN
L1-OUT
Y1_OUT
Y/Y2_OUT
W_OUT
C
EXPANSION PORT
R
RED
GREEN
NOT FOR
FIELD USE
CONNECTION TO
FURNACE CONTROL
BOARD
CONNECTION T
O
IQ THERMOST
A
T
(IF APPLICABLE)
MOTOR WIRING
HARNESS
RED
INPUT TERMINALS
COOL
HEAT
FAN SPEED
OUTPUT TERMINALS
HUMIDIFIER
OUTPUT
STATUS LIGHTS
DEHUMIDIFIER
OUTPUT
FOR USE
WITH IQ
OUTDOOR
UNITS
1 2 3 4 5 6 7 8
OFF ON
GREEN
RED
STATUS
NO
T USED
NOT USED
CONNECTION TO
FURNACE CONTROL
BOARD
MOTOR WIRE
HARNESS
R
C
Y1
TWIN
DHUM
W1
THERMOST
A
T
EXPANSION
PORT
COOL
HEAT
FAN SPEED
1 2 3 4 5 6 7 8
OFF ON
C
O
NNECTION
TERMINAL T
O
T
W
IN FURNA
CES
Figure 21. Two-Stage Fixed Speed
Motor Control Board
ELECTRICAL INFORMATION