Lochinvar & A.O. Smith 100110799 Damper Drive 321894-709 Minimal Maintenance: The free-floating lever

Minimal Maintenance: The free-floating lever mechanism reduces friction points

the motor maintains a consistent torque profile while adjusting airflow to match the modulated burner firing rate

Electrical Isolation: Efficiently switches high-current fan loads using a low-voltage 24V control signal

Simplified Installation: Designed for sweat-on application with extended connections that protect the internal element during brazing

The module operates on a standard 24V AC 50/60 Hz input and requires a transformer with at least a 20 VA rating

Lochinvar & A.O. Smith 100110799 Damper Drive 321894-709 Minimal Maintenance: The free-floating leverThe Lochinvar & A. O. Smith 100110799 Damper Drive is a critical flue damper actuator designed for 6 inch venting systems on high efficiency commercial boilers and water heaters. Engineered as the direct 192957 004 replacement part, this 24V motorized drive ensures precise control of the combustion air path, preventing standby heat loss during off cycles. It features a high torque internal motor assembly and integrated end switches that provide