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Wiring Diagrams
NOTES:
1. IF ANY OF THE ORIGINAL WIRING AS SUPPLIED WITH THIS FURNACE MUST BE REPLACED, IT MUST BE WITH WIRE HAVING A TEMPERATURE RATING OF AT
LEAST 105ºC.
2. FOR PROPER AIRFLOW IN COOLING/HEAT PUMP MODES, Y1 AND/OR Y2 MUST CONNECT FROM THE THERMOSTAT TO THE IFC LOW VOLTAGE TERMINAL STRIP.
3. FOR COOLING ONLY SYSTEMS, LEAVE Y1-O JUMPER IN PLACE ON THE IFC FOR CORRECT LED READOUT.
4. FOR HEATPUMP SYSTEMS, REMOVE THE Y1-O JUMPER, CONNECT "O" FROM THE THERMOSTAT TO "O" ON THE IFC LOW VOLTAGE TERMINAL STRIP FOR
CORRECT LED READOUT.
5. VSPD OD SYSTEMS REQUIRE DIFFERENT CONNECTIONS, SEE RELAY PANEL INSTRUCTIONS.
6. THE "BK" JUMPER MUST BE CUT WHEN APPLYING AN AIRFLOW COMMAND TO THE "BK" TERMINAL SUCH AS PULSE WIDTH MODULATION OR WHEN
PAIRED WITH A VSPD OD UNIT.
7. AIRFLOW TABLES ARE LOCATED IN THE SERVICE FACTS. TO CHANGE AIRFLOW, REFER TO THE INTEGRATED FURNACE CONTROL MENU AND OPTIONS
TO SET AIRFLOW AND BLOWER DELAYS.
8. CORRECT PERSONALITY MODULE IS REQUIRED FOR PROPER FURNACE OPERATION AND IS SPECIFIC TO EACH MODEL & SERIAL NUMBER. IT IS TO
REMAIN WITH THE ORIGINAL UNIT.
9. LINE CHOKE AND WIRE BK/35 ONLY USED ON MODELS WITH 1 HP MOTORS.
10. THERMAL LIMIT SWITCH 1 IS FOR UPFLOW, RIGHT SIDE RETURN ONLY ON C100 MODEL.
11. THERMAL LIMIT SWITCH 2 AND WIRE 31 ONLY PRESENT IN C100 MODEL.
GAS
THERMAL-LIMIT-1
THERMAL-LIMIT-2
BBOX-LIMIT
VALVE
YL/22
YL/31
1
2
3
RD/7
SEE NOTE 10
SEE NOTE 11
BL/4
BR/8
TNS
BL/2
WH/14
24v
120v
RD/5
BK/13
SEE NOTE 9
LINE CHOKE
BK/35
BK/27
E32
4
4 N/A
3
3 IND-(U)
2
2 IND-(V)
1
1 IND-(W)
E12
1
1 12V
2
2 RX
3
3 GND
4
4 TX
E14
MENU
12
12 N/A
YL/9
11
11 HLI
OPTION
BR/8
10
10 MVH
RD/7
9
9 MVL
GR/6
8
8 GND
7
7 N/A
GND 3
RD/5
PI 2
6
6 TH
BL/4
5
5 MVC
VCC 1
YL/3
4
4 HLO
3
3 N/A
BL/2
2
2 TR
1
1 N/A
5AMP
BK JUMPER
SEE NOTE 6
SEE NOTES 2, 3, 4, 5
LINE
}
BK BLACK
GR GREEN
FACTORY
WH WHITE
BR BROWN
WIRING
24 V
YL
YELLOW
RD RED
LINE
}
FIELD
OR ORANGE
BL
BLUE
WIRING
24 V
IGN HOT SURFACE
FUSE
IGNITER
RAF REVERSE
LC LINE CHOKE
** INTERNAL THERMAL
AIR FLOW
PROTECTION
PT PRESSURE
GROUND
TRANSDUCER
Variable Speed Inducer and Blower Motor
Hod
Heat Off Delay (sec)
Status Codes
15d
Inter-Stage Delay (sec)
IdL
Idle
9HC
Gas Heating CFM (Airflow x10)
Ht1
rUn
Gas Heating
Run Test Mode
Airflow (followed by
Error Codes
ArF
Airflow x 10)
E01
Loss of the IRQ/other internal failures
COF
Continuous Fan
Retry exceeded (Failed to est flame)
E2.1
One hour lockout time
CL1
1st Stage Cooling
CL2
2nd Stage Cooling
Recycles exceeded (loss of established
E2.2
flame). One hour lockout time
HP1
1st Stage Heat Pump
HP2
2nd Stage Heat Pump
1st Stage Gas Valve not energized when
E2.3
it should be. One hour lockout time
dFt
Defrost Mode
Menu Options
HLO relay not energized when it should be
E2.4
One hour lockout time
Err
Active Alarm Menu
Last 6 Faults (To Clear,
Signal Not Present <0.25V @ 5.0V
L6.F
E3.1
Hold Option Button 5 sec)
supply BK(VCC)-RD(GND)
Cr
Code Release Number
Signal Out of Bounds >4.25V @ 5.0V
E3.2
COd
Cooling Off Delay (sec)
supply BK(VCC)-RD(GND)
ODT
Outdoor Tonnage
Insufficient Pressure Pressure Less than
E3.3
0dU
Outdoor Unit
Target >10 seconds BK(VCC)-RD(GND)
Blower Constant Fan Airflow
Open Thermal Limit, Burner Box Limit,
C0F
E04
Multiplier %
or Reverse Airflow Switch
CPC
Cooling (CFM/Ton)
E05
Flame detected, should not be present
CPH
Heat Pump Heating (CFM/Ton)
14
RAF-1
RAF-2
YL/45
YL/45
1JPR
12V
1
2JPR
Tx
2
YL/42
BLOWER
GND
Rx
3
GR/41
MOTOR
AC
GND
4
WH/40
AC
BK/39
5
BL/35
WH/37
WH/36
120v 60 Hz. 1 PH
POWER SUPPLY PER LOCAL CODE
JUNCTION BOX
1
2
3
4
5
6
7
8
9
10
11
12
X
1
2
3
4
5
6
7
8
9
10 11 12
X
1
BK
1
2
2
PANEL LOOP
E23
WH/16
1
LINE
2
E25
WH/15
3
WH/14
4
E26
E39
1
2
3
FP
BK/12
BK/13
BK/27
E5
IGN
1
N 1
WH/20
1
2
BK/21
PERSONALITY
H 2
2
MODULE
1
E18
BK/32
1
GR/33
GR/33
2
2
3
PRESSURE
TRANSDUCER
BK/32
3
3
2
RD/34
RD/34
4
4
1
EAC
IFC
JUMPER
HUM
SEE NOTE 4
BK/17
Y1
O
BK
W1
R
G
B/C Y2
RD/18
WH/19
BK
W1 R
G B/C Y2 Y1 O
INTEGRATED FURNACE CONTROL
THERMOSTAT
ELECTRICAL RATING
INPUT: 24 VAC, 60 HZ
XFMR SEC. CURRENT: 450 MA. + MV LOAD
MV OUTPUT: 1.5A @ 24 VAC
FP
FLAME PROBE
IND OUTPUT: 2.2 FLA, 3.5 LRA @120 VAC
GND GROUND
IGN OUTPUT: 2.0 A @ 120 VAC
H
LINE
CIRC. BLOWER OUTPUT:
HLI HIGH LIMIT INPUT
14.5 FLA, 25 LRA @ 120 VAC
HLO HIGH LIMIT OUTPUT
HUMIDIFIER & AIR CLEANER 120VAC
IFC INTEGRATED FURNACE CONTROL
OUTPUT MAX. LOAD: 1.0 A @ 120 VAC
IGN IGNITER
FUSE: 5A
IND INDUCER
MV MAIN VALVE
THERMAL LIMIT
TIMINGS
MVC MAIN VALVE COMMON
PREPURGE:
MVH MAIN VALE HIGH
INTERPURGE: 60 SEC.
MVL MAIN VALVE LOW
POST PURGE: 5 SEC.
FP FLAME PROBE
N
NEUTRAL
IGN WARMUP: 20 SEC.
RAF REVERSE AIRFLOW
IAP: 2 SEC.; TFI: 5 SEC.
Rx
RECEIVE SIGNAL
RETRIES: 6 RECYCLES: 10
TH 24VAC (HOT)
HEAT ON DELAY: 30 SEC.
TNS TRANSFORMER
COOL ON DELAY: 0 SEC.
TR 24VAC (COMMON)
AUTO RESTART: 60 MIN.
Tx
TRANSMIT SIGNAL
VCC COMMON COLLECTOR VOLTAGE
E6.1 Voltage reversed polarity
E6.2 Bad Grounding
E6.3 (1) Igniter relay fails, (2) Igniter open
E7.1 1st stage gas valve (MVL) is energized when it should be off
E7.2 Redundant Relay (HLO output) energized when it should be off
E08
Flame current is low, but still strong enough to allow operation.
Inducer motor no communication response. Possibly caused by a
E10
communication failure between two microcontrollers.
(1) 1st stage gas valve energized when it should not be
E11
(2) 1st stage gas valve not energized when it should be
(3) Redundant relay (HLO output) not energized when it should be
E12
Open fuse
E13
Blower HP/OEM ID
E14
No PM and local copy bad
Both Unit Data File in PM and local Unit
E15
Data File are Corrupt
E17
Blower motor no communication response
Blower communication failure on the control
E18
L8V1
1
2
3
4
BK/38
H
N
GND
X
X
X
IFC
BK/28
NEUTRAL
BK/12
LINE
FLAME
IGN-N
E5
IGN-H
VENT
IND-(W)
MOTOR
IND-(V)
E32
(INDUCER)
**
IND-(U)
1 2 3 4
BLW-12V
E12
BLW-GND
PT-VCC
E18
PT-PI
PT-GND
E14
30 SEC.
Y1
O
BK
W1 R
G
B/C Y2
BK
W1
R
G
B/C Y2
Y1
THERMOSTAT
D346645P01 REV D
L8V1
E23
WH
E25
WH
WH
E26
E47
BK
E21
BK
BK
1
1
E19
BK
BK
2
2
BK
WH
E39
FLAME PROBE
IGN
1
WH
2
BK
1
BK
VENT
2
RD
MOTOR
3
WH
(INDUCER)
**
4
1
BL
WH
RX
2
3
BK
TX
4
WH
1
RD
1
2
BK
BK
3
GR
GR
2
PRESSURE
TRANSDUCER
3
4
RD
1
N/A
2
BL
TNS
TR
3
BL
N/A
WH
HLO
4
YL
24v
120v
MVC
5
BK
TH
6
RD
RD
BK
N/A
7
8
GR
GND
RD
9
MVL
BR
MVH
10
11
YL
HLI
THERMAL_LIMIT_1
RAF-1
RAF-2
12
N/A
YL
O
YL
BK
BK
LINE CHOKE
GR
GR/BK
GR/YL
GR/YL
BK
WH
1JPR
YL
2JPR
GND
GR/BK
AC
WH
AC
BK
BLOWER
MOTOR
BL
12V
WH
Tx
WH
Rx
BK
GND
1
RD
2
BK
3
BR
THERMAL_LIMIT_2
BBOX_LIMIT
YL
YL
YL
L8V1-SVX001-1A-EN
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