Instruction manual

50
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.
NO
Fuse 3A
Y
Manual Reset Auxiliary Limit Controls
PK
Induced
Draft
Blower
40 VA
Transformer
PR
GY
N
BU
10
DEHUM
3
O
NO
PK
Diagnostic
LEDs
BR
L
1
Low-Fire
Pressure
Switch
PS2 (12)
Flame
Sensor
Hot Surface Igniter
OR
TR (11)
Front Cover Pressure Switch
Y
G
VA C
24V Humidifier
HI
C
TH (4)
2
4V Thermostat Connections
Gas Control
Valve
R
4
1
FS
GND
3
Junction Box
115
W
W2 C
1
7
WARNING:
Disconnect Power
Before Servicing. Wiring
To Unit Must Be Properly
Polarized and Grounded.
W2
3
G
BK
GY
5
3
BU
BR
1
13
W
NO
Auto Reset Primary Limit Control
HLI (1)
1
Neutral
OR
Y2
Electronic
Air Cleaner
Y1
W
Y1
L
PR
HLO (10)
GY
IGN
IND HI
BK
GND (5)
5
2
GY
R
Induced Draft Blower 2-Stage Pressure Switch Assembly
OR
OR
W
O
MVL (13)
NO
W1
W1
24V Thermostat Connections
PR
High-Fire
Pressure
Switch
8
PK
PR
Disconnect
EAC
2
FS
C
11
Front Cover
Pressure Switch
4
NEUTRAL
BR
BK
LINE
C
Blower Compartment
Door Switch
(Open When Door Open)
Junction Box
GND
1
R
Circulator Blower
1
OR
HUM
3
Manual Reset Auxiliary
Limit Controls
40 VA Transformer
Y2
14
IND LO
Manual Reset Rollout Limit Controls
9
W
N
Humidifier
Indoor Air
Circulator
Blower
High-Fire
Pressure Switch
2-Stage
Gas
Control
Valve
C
W
PSO (7)
2
HUM
2-Circuit
Connector
Y
GND
VA C
W
Chassis Ground
2
3
Low-Fire
Pressure Switch
Door
Switch
W
OR
2
MVC (8)
Hot
Surface
Igniter
R
W
2
24V Humidifier
Integrated Control Module
LINE
5
DEHUM
To 115 VAC/10/60 Hz Power Supply with
Overcurrent Protection Device
GND
Y
PR
C
115 VAC
6
2
C
EAC
Induced Draft Blower
15
Fuse
BK
1
PM
BK
24
Blower Compartment
24V Humidifier
BK
4
BK
C
PS1 (2)
OR
Auto Reset
Primary Limit
Control
24 VAC
NO
ECM Motor
Harness
PM
MVH (14)
BR
HI
OR
GY
Integrated Control Module
Flame Sensor
4
R
BK
2
C
12
R
LINE
G
BR
24 V
3 A
Burner Compartment
GND
Humidifier
BK
Indoor Air
Circulator
Blower
TX (3)
RX (2)
+ VDC (1)
GND (4)
To
R
To
Micro
To +VDC
2
COOL
See NOTE 5.
1
DELAY
T-STAT
2ND STG DLY
DEHUM
4
HEAT
ADJUST
3
UNUSED
HEAT OFF
DELAY
NO
G
C
BU
W
Manual Reset Rollout Limit Controls
(Single control on 45 kBtu)
PK
GND
Inductor Coil
70 kBtu, 90 kBtu, 115 kBtu Models Only
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
R
BU
GY
5-Circuit Connector
4-Circuit Motor
Connector
2-Stage Integrated
Control Module
DIP Switches
To
Micro
Neutral
Neutral
Neutral
Neutral
Neutral
Integrated Control Module
Inductor Coil
70 kBtu, 90 kBtu,
115 kBtu Models Only
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
Disconnect