ICM Controls ICM6700 12 VDC Direct Spark Ignition Control Board

ICM Controls ICM6700 12 VDC Direct Spark Ignition Control BoardDescription:Suburban Replacement. This ignition control circuit board works on all Suburban 12V furnaces and Suburban water heater model 520820.When the thermostat calls for heat, the ICM6700 will verify the sail switch is open before energizing the inducer blower. Once the inducer blower is energized, the ICM6700 will verify the sail switch has closed and begin a 15 second pre-purge cycle. Following the inducer blower pre- purge cycle, the gas valve and spark ignitor are energized and the ICM6700 will verify the presence of flame.