ICM291 Direct Spark Ignition Control Board LH33WP003

ICM291 Direct Spark Ignition Control Board LH33WP003

Furnace Control Control - replacement for Carrier LH33WP003/3A control boards

• Low cost, direct replacement for Carrier: LH33WP003A
• Direct Spark Ignition (DSI) control board
• Microprocessor-based
• Controls combustion, blower and indorr fan motors; spark ignitor; and the gas valve
• Monitors timing, trial for ignition, flame sensing and lockout
• 100% lockout safety feature
• Compatible with LP or Natural Gas
• Status LED for fault

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

Input

• 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