For 80+ and 90+ 2-Stage Variable Speed Model Furnaces
7106400 (Replaces 7106230)
¢710640q¤
7106400
(11/06)
WIRING DIAGRAM
BLACK
BK
BLACK
BLACK
GREEN
GREEN
ORANGE
BLUE
BLUE
ORANGE
BLACK
WHITE
BROWN
RED
YELLOW
YELLOW
ADAPTER
BROWN
GREEN
BLUE
GREEN
WHITE
RED
ORANGE
BLUE
YELLOW
BROWN
YELLOW
GREY
BLACK
WHITE
BLACK
(*TL ONLY)
CLOSED END
CONNECTOR
DO NOT REMOVE
YELLOWYELLOW
BROWN
BLACK
ORANGEBLUE
MAIN
PRESSURE
SWITCH
FLAME ROLL-OUT
SWITCH
VENT SWITCH
(*TA & *TK ONLY)
SUPPLY AIR
LIMIT SWITCH
BLOWER DECK
LIMIT SWITCH
(SELECT MODELS ONLY)
12
2
1
12
2
1
CR
1
2
3
6
5
4
1
2
36
5
4
9
8
7
INDUCER
IGNITOR
PRIMARY
GAS
VALVE
LOW HI C
FLAME SENSOR
BLOWER OFF
NEUTRALS
COM
24 V
3 AMP FUSE
WHITE W/BLK STRIPES
TRANSFORMER
BLK W/WHITE STRIPES
24 V 120 V
HORIZONTAL
PRESSURE
SWITCH
(*TC ONLY)
BLOWER
DOOR
SWITCH
WHITE
BLACK
TWIN
EAC
HUM
2-PIN PLUG
5-PIN PLUG
BUSHING
BUSHING
VARIABLE SPEED BLOWER CONTROL BOX
HARNESS
2-PIN HOUSING
HUM
M1
M2
M3
HEAT
COOL
EAC
XFMR
FLAME STATUS
L1
BLUEBLUE
5
5
4
4
3
3
2
2
1
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
1
POWER FACTOR
CORRECTION
CHOKE
VARIABLE
SPEED
BLOWER
MOTOR
6 - PIN PLUG
9 - PIN PLUG
8
H
U
M
H
U
M
13R1210
57112W4
1234567
SWITCHES
9
BLACK
GREY
JUMPER
RED
RCYGW
YB
VENT SAFETY
SWITCH
BLACK
NOTES:
1. Use copper conductors only.
2. If any original wire supplied with the furnace must be replaced,
replace with wiring material having a temp. rating of at least 105 C.
3. Refer to the Installation Instructions provided with the furnace for the
appropriate heating/cooling speed settings for your application.
4. Ensure that wires from the blower remain connected to th board
thermostat terminals after making the field thermostat connections.
5. Wiring shown for 2-stage operation when
using a multistage thermostat.
Warning - Remove Yellow/Black wire from
primary gas valve and utilize for wiring
furnace for 2-stage operation.
FIELD WIRING
LEGEND:
LOW VOLTAGE
HIGH VOLTAGE
1
2
3
4
5
6
7
8
9
12
13
14
15
16
10
11
Y1
Y2
Y1
Y2
THERMOSTAT
RC YGW
BLUE
Y2
YELLOW
Y1
REMOVE BLUE
WIRE FROM
Y TERMINAL
OF FURNACE
BOARD
INSERT A: TWO STAGE CONDENSING UNIT
Limit Circuit Open or External Load On "W" 1 FLASH
Pressure Switch is Open with Inducer On 2 FLASHES
Pressure Switch is Closed with Inducer Off 3 FLASHES
Ignition Failure (Check Ground) 4 FLASHES
115 VAC & Neutral Reversed or no Ground 5 FLASHES
False Flame or Gas Valve Relay Shorted Continuous
Low Flame Sensor Signal
Continuous
OPTIONAL
HUMIDISTAT
(WIRED
NORMALLY
CLOSED)
REMOVE
JUMPER
WHITE(NEUTRAL)
BLACK 120V
GROUND
R
Y
G
W
W2
C
Y
IF TWO STAGE CONDENSING
UNIT IS USED, SEE INSERT A
A/C
CONDENSING
UNIT
SEE INSTALLATION
INSTRUCTIONS
FOR ALTERNATE
MEANS OF USING
SECOND STAGE
SEE NOTE 5
BLACK
