ICM2813
Features
Integrated Furnace Control Board
• Controls the gas valve, inducer draft motor, circulating
blower and hot surface ignitor
• Monitors system pressure and limit switches
• Microprocessor based precision
• Diagnostic LEDs aid in testing and troubleshooting
Replaces
Lennox: 10M9301, 12L6901, 32M8801, 56L8401, 24L8501,
63K8901, 97L4801, 100925-01, 100925-03,
17W9201, 23W5101, 30W2501, 69M0801,
69M1501, 83M00
White-Rodgers: 50A65-120, 50A65-121, 50A62-120,
50A62-121, 50A62-820, 21D83M-843,
50A66-122, 50A66-123
Specifications
Installation, Operation & Application Guide
For more information on our complete range of
American-made products – plus wiring diagrams,
troubleshooting tips and more,
visit us at www.icmcontrols.com
• Electrical Rating @ 77°F (25°C)
• Input Voltage: 18-30 VAC, 60 Hz
• Ignitor Current: 2.0 amp @ 80 VAC, 60 Hz (resistive)
• Inducer Relay: 2.2 FLA–3.5 LRA @ 120 VAC
• Blower Relay: 14.5 FLA–25.0 LRA @ 120 VAC
(Heat / Cool / Fan)
• Gas Valve Relay: 1.5 amp @ 25 VAC, 60 Hz 0.6 pf
Environmental
• Operating Temp Range: -40° to 176°F (-40° to 80°C)
• Humidity Range: 5 to 95% relative humidity
(non-condensing)
Introduction
The ICM2813 is a form, fit, and functional replacement for the Lennox and White Rodgers boards shown in the cross reference
section of this guide. The ICM2813 automated gas ignition control board monitors the ignition sequence including the inducer,
pressure switch, hot surface igniter, gas valve, flame sense, and circulating blower while maintaining full safety circuit monitoring
including the high limit switch, roll out switch and auxiliary limit switch circuits. Onboard diagnostics will indicate when a fault
condition exists.
Mode of Operation
Upon a call for heat, the thermostat will energize the W terminal with 24 VAC. With the heat call in place, the inducer fan and
humidifier (optional) will be energized thus closing a pressure safety switch. The control will enter a 15 second inducer pre purge
cycle. Upon verification of the pressure switch closure and completion of the 15 second inducer pre-purge, the hot surface igniter
is energized. There is a 20 second igniter warm up period before energizing the gas valve. Once the gas valve is energized,
gas flows into the burners where it is ignited by the hot surface igniter. Once the burners are on, the flame is sensed by a flame
rectification circuit and flame sensor. There is a 4 second trial for ignition period where the control checks the flame signal and
proves the flame. Once flame is established, there will be a 45 second heat ON delay before energizing the main blower. When
the call for heat ends, the gas valve is de-energized, burners go off, flame is proven lost and there is a fixed 5 second inducer
post purge to purge any residual exhaust gases from the system. Following the inducer post purge, the inducer and humidifier are
turned off and subsequently the heat blower is turned off after the user selected off delay time expires. Upon a call for cooling, the
Y terminal is energized with 24 VAC and a 2 second cool blower ON delay begins. After the ON delay expires, the EAC and cool
blower outputs are energized. Once the call for cooling ends, there is a user selectable 2 second or 45 second cooling blower
OFF delay to purge the residual cool air from the duct work. At the end of the OFF delay, the cool blower and EAC are turned off.
Lockout Features
There is a 5 minute self healing recovery which occurs if the pressure switch is stuck open. The inducer will run for 150 seconds
then enter a 5 minute self healing recovery. This cycle will repeat until the pressure switch closes.
There will be a 1 hour lock out if the flame is not established and proved within 5 successive attempts. After one hour in lockout,
the control will reset automatically.
Electrostatic Discharge (ESD) Precautions
Use caution when installing and servicing the furnace to avoid and control electrostatic discharge;
ESD can impact electronic components. These precautions must be followed to prevent electrostatic
discharge from hand tools and personnel. Following the precautions will protect the control from ESD
by discharging static electricity buildup to ground.
1. Disconnect all power to the furnace. Do not touch the control or the wiring prior to discharging your body’s electrostatic charge
to ground.
2. To ground yourself, touch your hand and tools to a clean, metal (unpainted) furnace surface near the control board.
3. Service the furnace after touching the chassis. Your body will recharge with static electricity as you shuffle your feet or move
around, and you must reground yourself.
4. Reground yourself if you touch ungrounded items.
5 Before handling a new control, reground yourself, this will protect the control. Store the used and new controls in separate
containers before touching ungrounded objects.
6. ESD damage can also be prevented by using an ESD service kit.
Remove Existing Control
CAUTION!
To service control, and prior to disconnection, label all wires.
Failure to do so may result in wiring errors which can cause dangerous operation.
1. Turn thermostat to OFF position or set it to the lowest possible
setting.
2. Turn OFF electrical supply to furnace.
3. Turn OFF gas supply to furnace.
4. Remove furnace blower and control access doors.
5. Remove control box cover.
CAUTION!
Failure to turn off gas and electric supplies can result in explosion, fire,death, or personal injury.
6. Disconnect thermostat wires and humidifier wires (if equipped
with a humidifier).
7. Disconnect line voltage, blower, electronic air cleaner wires (if
equipped), and transformer wires.
8. Remove wiring harness from circuit board.
9. Remove screws or any other fasteners and old circuit board.
10. Examine control and control box to check for water
stains.
11. Make repairs if any sources of water leakage are found.
Be sure to check humidifiers, evaporator coils, and vent
systems in the area of the control.
Install New Control
1. Ground yourself properly before installing the new ICM2813 control board.
2. Mount the new control using any screws and fasteners previously removed.
Heat Blower Jumper Settings
PIN
1-2
3-4
5-6
7-8
Time
180 seconds
120 seconds
90 seconds
60 seconds
3. Connect all line/low voltage, accessory,
thermostat and ground wires.
4. Verify the sequence of operation.
Cool Blower Jumper Settings
PIN
9 - 10
10 - 11
Time
2 seconds
45 seconds
Timing (in seconds unless specified)
Pre Purge
Ignitor Warm Up Time
Trial for Ignition
Retries
Interpurge
Post Purge
15
20
4
4 retries
15
5
Lockout Time
Heat Fan ON Delay
Heat Fan OFF Delay*
Cooling Fan ON Delay
Cooling Fan OFF Delay*
Auto Reset
300
45
60/90/120/180
2
2 or 45
60 minutes
* The heating and cooling OFF
delay depends on the option
chosen by the jumper position.
The default settings for the
heating and cooling OFF delays
are 90 seconds and 45 seconds
respectively.
LED Fault Codes
LED
Status
Description
Trouble Shooting Tips
ON
Normal operation
N/A
OFF
Control board failure
Check for proper input voltage and check the fuse; if not resolved replace control.
1
Ignition failure (soft
lockout)
Clean or replace the flame sensor, check the igniter for proper operation & input voltage, check
the transformer’s common is grounded to earth ground.
2
Pressure switch stuck
closed
Check for contaminated or defective pressure switch.
3
Pressure switch stuck
open
Check for obstructed pressure switch tubing or defective pressure switch. Check for oxidation on
terminals, broken wires, or defective inducer motor .
4
Limit switch fault
Checked for blocked airflow, blocked duct work, and dirty filter. Check or replace high limit switch
if defective.
5
Flame out of sequence
Check for intermittent or defective gas valve and check for dirty or defective flame sensor.
6
Roll out switch fault
Check for a cracked heat exchanger, defective rollout switch , broken wires on the roll out switch,
or replace roll out switch if required.
7
Weak flame
Weak flame is caused by carbon build up on the flame sensor, poor grounds, or improper
placement of flame sensor . Clean or replace flame sensor, reassure grounds, ensure flame
sensor is fully enveloped in the flame.
8
Miswired gas valve
Check for shorted or mis-wired gas valve, check harness wires for any shorts or breaks, and
check the pressure switch for proper operation.
9
Unused
N/A
10
Hot and neutral
reversed
Check for proper polarity of incoming voltage on the primary and secondary of the transformer.
11
Brownout
A brownout fault indicates a low voltage condition. Check the voltage on the primary and the
secondary of the transformer and ensure there is no excessive load on the transformer.
Flame Sense Troubleshooting Tips
Flame not established
1. If the flame is not established or proven during the initial sequence, the gas is shut off (if energized) and the board will enter a
retry mode. There will be four more successive attempts allowed each having a 15 second inducer purge between attempts.
2. After the initial attempt and four successive attempts, if flame is still not established and proven there will be a 1 hour lock
out before the system will reset automatically. To reset the control before the 1 hour lockout has elapsed, cycle off and on the
24 VAC power to the board. If the problem is not a false flame, the board can also be reset by cycling the heat call off and on.
However if the problem is a false flame (flame detected when the gas valve is de-energized and there is no flame), cycling the
heat call will not reset the board.
Flame out
1. Flame out is considered when flame is lost during heating.
2. When a W signal is present and flame is lost and no longer sensed, the gas valves will disengage until the next trial for ignition.
The circulating blower and inducer will remain running.
3. If all retry attempts fail and the flame is still not proven, there will be a 1 hour lock out before the system resets automatically.
False flame
1. Flame out of sequence represents a scenario when flame is sensed while gas valve is de-energized.
2. Inducer and Blower motors will be engaged (if not already running) and keep running for as long as the fault condition is
present.
Wiring Diagram
FAN
PARK
Continuous Fan
HEAT
BRN
CAP-1
BRN
Neutral
Heat Speed
Cool Speed
60
90
120
180
HEAT OFF
DELAY
COOL
PIN 7 PIN 8
PIN 5 PIN 6
PIN 3 PIN 4
PIN 1 PIN 2
BLOWER
MOTOR
120 VOLT HOT
PIN 11
PIN 10
PIN 9
LED1
45
2
COOL OFF
DELAY
GRN/YEL
PARK
XFRM
HUM
T5
T4
120 VOLT NEUTRALS
LINE
L2
NEUTRAL
Flame Sensor
HUM
T3
FS
T2
24V
ONLY
T1
ICM2813
P2
24V SEC
P1
PRI
LINE
120 VOLT HOT
EAC
NEUTRAL
LINE
INDUCED
DRAFT
MOTOR
L1
HSI
GND
2
3
4
5
6
8
9
RS 2
PRS
LS 2
LS 2
LS
Primary
10
11
12
GAS
VALVE
NO
PRI
24V SEC
RS 1
7
C
1
GND
Chasis
GND
P1 Plug Pin Out
1 = High limit output
2 = N/A
3 = 24 VAC
4 = N/A
5 = Rollout switch 1
6 = 24 VAC common
7 = High limit input
8 = Ground
9 = Main valve common
10 = Pressure switch
11 = Rollout switch 2
12 = Main valve
P2 Plug Pin Out
1 = Inducer Blower
2 = Hot Surface Ignitor
3 = Neutral
4 = Neutral
Chasis
ground
7313 William Barry Blvd., North Syracuse, NY 13212
(Toll Free) 800-365-5525 (Phone) 315-233-5266 (Fax) 315-233-5276
www.icmcontrols.com
Legend
EAC = Electronic air
cleaner
FS
= Flame sensor
GND = Ground
HSI
= Hot surface
ignitor
HUM = Humidifier
LS
= Limit switch
PRI
= Primary
PRS = Pressure switch
RS
= Rollout switch
SEC = Secondary
XFRM = Transformer
Earth
ground
LIAF270
">
