ICM291 Gas Ignition Control Board

Specifications:

• Control Voltage: 24 VAC (18-30 VAC), 60Hz
• Line Voltage: 208/230 VAC, 60Hz

Timing:

• Pre-Purge: 45 seconds
• Trial for Ignition: 5+2 seconds
• Retry Period: Every 20 seconds for 15 minutes
• Lockout: Manual reset
• Post-Purge: 45 seconds

LED Indicators:

• Red LED: Steady ON-normal operation.

Flashing-fault codes Inputs:

• Power: RT and C
• Thermostat Interface: R,W, and G
• Safety Switches: RS, LS, and CS
• Combustion Motor Hall Effect Sensor

Flame Sensing Outputs:

• Spark – Gas Valve: GV
• Combustion Motor: CM
• Blower Motor: BM
• Indoor Fan Motor: IFO