Install Instructions

Installation, Operation & Application Guide
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ICM2813
Integrated Furnace Control Board
Features
• 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
The ICM2813 is a form, t, 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, ame 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.
Introduction
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
• 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)
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
humidier (optional) will be energized thus closing a pressure safety switch. The control will enter a 15 second inducer pre purge
cycle. Upon verication 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 ows into the burners where it is ignited by the hot surface igniter. Once the burners are on, the ame is sensed by a ame
rectication circuit and ame sensor. There is a 4 second trial for ignition period where the control checks the ame signal and
proves the ame. Once ame 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, ame is proven lost and there is a xed 5 second inducer
post purge to purge any residual exhaust gases from the system. Following the inducer post purge, the inducer and humidier 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.
Mode of Operation
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 ame is not established and proved within 5 successive attempts. After one hour in lockout,
the control will reset automatically.
Lockout Features