Lochinvar & A.O. Smith 100110800 Damper Drive

The Lochinvar & A.O. Smith 100110800 motorized damper drive is a critical component for managing combustion air intake and flue gas flow in high-efficiency industrial boilers and commercial water heaters. This 8-inch flue damper actuator serves as a direct replacement for legacy part numbers 100110800 and 105151-000, engineered specifically for Lochinvar Copper-Fin II and Power-Fin series units. Operating on a 24VAC control circuit, this drive prevents standby heat loss by closing the flue pipe when the burner is off and ensures safe venting by confirming the open position through an integrated end switch before ignition occurs. Technicians should verify wiring harness compatibility and damper blade alignment during installation to maintain optimal static pressure and combustion efficiency. Using this OEM Lochinvar damper motor ensures the system remains within factory specifications for A.O. Smith Cyclone and related high-efficiency water heater applications.

Key Technical Benefits

• Precise Airflow Control: Facilitates exact modulation of the flue damper to maximize thermal efficiency and reduce cycling losses.
• Integrated Safety Interlock: Features a robust end switch that completes the ignition circuit only when the damper is fully open.
• OEM Compatibility: Designed for seamless integration with Lochinvar Power-Fin and A.O. Smith commercial venting systems.
• Durable Gear Train: Engineered to withstand high-ambient temperatures near the flue collector without signal degradation.

Common Installation Questions

How do I troubleshoot a 100110800 damper drive that won't open?
Confirm 24V power at the actuator. If power is present but the motor doesn't turn, check for mechanical obstructions in the 8-inch damper pipe or internal gear failure. If it turns but the burner doesn't fire, test the end switch continuity.

Will this motor work with a Power-Fin PB series boiler?
Yes, this Lochinvar burner component is the standard replacement for most Power-Fin and Copper-Fin II models requiring an 8-inch drive assembly.

Can I manually override the damper position?
Manual manipulation is not recommended as it can strip the internal gears and prevent the end switch from providing the necessary safety signal to the control board.

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Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.