38
WIRING DIAGRAM
Check codes for proper wiring and circuit protection before installation.
NOTES:
1. Set heat anticipator on room thermostat at 0.7 amps.
2. Manufacturer’s specified replacement parts must be used
when servicing.
3. 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 105ºC. Use copper conductors
only.
4. Furnace must be permanently grounded and conform to NEC
and local codes.
5. To recall the last 6 faults, most recent to least recent, depress
switch for more than 2 seconds in standby (no thermostat
inputs).
HIGH VOLTAGE!
WARNING
Disconnect ALL power before servicing.
Multiple power sources may be present.
Failure to do so may cause property damage, personal injury or death.
GY
BK
24 V
3 A
B
U
G
R
12
C
2
BK
4
BR
Y
HI
BU
PM
NO
3
BK
4
BK
BK
PM
1
BK
15
C
2
6
BU
Y
5
2
W
BK
2
R
W
4
3
2
2
W
C
W
9
14
Y2
3
HUM
Y
1
R
1
C
Y
4
11
C
2
EAC
PR
R
8
W
W1
W1
O
W
R
Y
R
BU
2
5
BK
PK
PR
Y1
Y1
Y2
R
1
W
NO
W
13
1
OR
3
5
BR
BK
G
3
W2
7
1
C
W2
W
3
FS
1
4
BK
PR
HI
1
G
Y
C
Y
G
1
Y
R
O
3
DE
H
U
M
10
OR
NO
W
PR
Y
2
Wiring is subject to change.
Always refer to the wiring
diagram on the unit for the
most up-to-date wiring.
Low Voltage (24V)
Low Voltage Field
High Voltage (115V)
Junction
Terminal
Internal To
Integrated Control
Plug Connection
Equipment GND
Field GND
Field Splice
Switch (Temp.)
Igniter
Pressure Switch
Overcurrent
Prot. Device
High Voltage Field
Gray
GY
White
W
Black
BK
Red
R
Blue
BU
Orange
OR
Yellow
Y
Green
G
Pink
PK
Azure
A
Violet
V
Brown
BR
Color Symbol
Low-Fire
Pressure
Switch
Auto Reset Primary Limit Control
Induced Draft Blower 2-Stage Pressure Switch Assembly
High-Fire
Pressure
Switch
2-Stage
Gas
Control
Valve
2-Circuit
Connector
Hot
Surface
Igniter
24V Humidifier
Manual Reset Rollout Limit Controls
BU
Auto Reset Auxiliary Limit Control
40 VA
Transformer
Diagnostic
LEDs
24V Thermostat Connections
NEUTRAL
GND
LINE
Induced Draft Blower
Fuse
Blower Compartment
Burner Compartment
COOL
See NOTE 5.
DELAY
T-STAT
2ND STG DLY
DEHUM
HEAT
ADJUST
UNUSED
HEAT OFF
DELAY
5-Circuit Connector
4-Circuit Motor
Connector
2-Stage Integrated
Control Module
DIP Switches
Fuse 3A
PS2 (12)
Flame
Sensor
Hot Surface Igniter
TR (11)
24V Humidifier
TH (4)
4V Thermostat Connections
Junction Box
WARNING:
Disconnect Power
Before Servicing. Wiring
To Unit Must Be Properly
Polarized and Grounded.
HLI (1)
HLO (10)
IGN
IND HI
GND (5)
MVL (13)
NO
FS
LINE
Blower Compartment
Door Switch
(Open When Door Open)
IND LO
High-Fire
Pressure Switch
PSO (7)
HUM
Chassis Ground
Door
Switch
MVC (8)
24V Humidifier
Integrated Control Module
To 115 VAC/10/60 Hz Power Supply with
Overcurrent Protection Device
EAC
PS1 (2)
MVH (14)
Flame Sensor
LINE
TX (3)
RX (2)
+ VDC (1)
GND (4)
To
R
To
Micro
To +VDC
To
Micro
Inductor Coil
70 kBtu, 90 kBtu,
115 kBtu Models Only
Disconnect
R
BU
Circulator Blower
ECM Motor
Harness
GND
Inductor Coil
70 kBtu, 90 kBtu, 115 kBtu Models Only
Gas Control
Valve
GND
Integrated Control Module
Humidifier
Indoor Air
Circulator
Blower
Manual Reset Rollout
Limit Controls
Low-Fire
Pressure Switch
Neutral
Manual Reset Auxiliary
Limit Control
40 VA Transformer
115 VAC
Auto Reset
Primary Limit Control
24 VAC
Neutral
Neutral
Neutral
Neutral
Neutral
Induced
Draft
Blower
GND
Electronic
Air Cleaner
Junction Box
Humidifier
Indoor Air
Circulator
Blower
Integrated Control Module
Disconnect
GND
WARNING:
Disconnect Power
Before Servicing. Wiring
To Unit Must Be Properly
Polarized and Grounded.
To 115 VAC/10/60 Hz Power Supply with
Overcurrent Protection Device
GND
N
L
L
N
BR
W
R
BK
VAC
115
VAC
24
R
DEHUM
W
