Wiring Guide Part 1

HUM
ICM2805 WIRING DIAGRAM
For Models G(3,4)R(-) Gas Furnaces with UTEC Control Board #624631
12
11
10
9
8
7
6
5
4
3
2
1
24V
COM
L
ML
MH
H
C
1 2 3 4 5 6
BLACK
BLUE
ORANGE
RED
ORANGE
RED
BLUE
BLACK
WHITE W/ BLACK STRIPES
24V
BLACK W/ WHITE STRIPES
WHITE
WHITE
BLACK
BLACK
TRANSFORMER
SWITCH
BLOWER DOOR
WHITE OR ORANGE
3 OR 4
SPEED
MOTOR
SWITCH LIMIT
BLOWER
(Down-Flow
Units Only)
SWITCH
LIMIT
SWITCH
FLAME
ROLL-OUT
SWITCH
VENT
LIMIT
GAS
VALVE
BLUE
BLUE
ORANGE
ORANGE
WHITE
BLUE
RED
YELLOW
BROWN
WHITE
BLUE
BLUE
ORANGE
ORANGE
WHITE
BLUE
RED
YELLOW
BROWN
WHITE
BLACK
PRESSURE SWITCH
INDUCER
IGNITOR
FLAME SENSOR
1 4
2 5
3 6
1 4 7
2 5 8
3 6 9
BLACK
BLACK
LI
XFMR
EAC
COOL
HEAT
M3 M2 M1
HUM
EAC
NEUTRALS
TWIN
3 AMP FUSE
WGYCR
W
G
Y
R
FLAME
STATUS
JUNCTION BOX
YC
ROOM
THERMOSTAT
AIR CONDITIONER
CONDENSING UNIT
LAPP46-1
BLOWER OFF
60
90
120
180
BLACK
WHITE
FAULT CONDITION STATUS RED LIGHT
Power ON ON
Limit circuit open 1 FLASH
Pressure switch stuck open 2 FLASHES
Pressure switch stuck Closed 3 FLASHES
Ignition failure (check ground) 4 FLASHES
115 VAC & neutral reversed or no ground 5 FLASHES
Continuous
Power OFF OFF
FAULT CONDITION FLAME YELLOW LIGHT
Flame present ON
False flame or gas relay shorted
Low flame sensor signal Continuous flash
NOTE:
If any of the original wire as supplied with
the furnace must be replaced, it must be
replaced with wiring material having a
temperature rating of at least 105 C.
Use copper conductors only.
LEGEND
• Field Wiring
Factory Wiring:
• Low Voltage
• High Voltage
120/240V
120/240 INPUT
VOLTAGE
GROUND