ICM2909 Direct Spark Ignition (DSI) Control Board

■ Inputs

• Line voltage: 208-230 VAC, 50/60 Hz 
• Control voltage: 18-30 VAC, 50/60 Hz 
• System switches: Vent pressure, limit and MRLC (Manual Reset Limit Control) 

■ Outputs

• Heat N.C.: 16FLA/30 LRA @ 277 VAC, 30K @ 85°C 
• Cool N.O.: 15FLA/36 LRA @ 277 VAC, 100K @ 85°C 
• Inducer: 9.8FLA/58.8LRA, 1/2HP @ 120 VAC, 6K @ 75°C 
• Gas valve: 2.3 A PILOT DUTY @ 240 VAC, 6K @ 75°C 

■ Heat Operation Timing

• Pre-purge: 3 seconds 
• Heat blower ON delay: 30 seconds 
• Post-purge: 5 seconds 
• Heat blower OFF delay: 90 seconds 
• Ignition trial: 7 seconds 
• Inter-purge (retrial): 15 seconds 
• Ignition activation period: 5 seconds 
• Flame establishing period: 2 seconds 
• Flame failure response time: 0.8 seconds (maximum)