Manual Override Switch: Provides rapid control of the connected load for maintenance or troubleshooting without affecting the 24-hour cycle

one-handed attachment without complex linkages

Standard lead lengths on the 2721 series are designed to reach terminal connections within standard burner housings

Low Pressure Drop: Designed for suction line installation with a flow pattern that minimizes restriction

or the start capacitor staying in the circuit too long

Lochinvar & A.O. Smith 100109864 Blower Assembly 318518-761 Manual Override Switch: Provides rapidThe Lochinvar & A. O. Smith 100109864 Blower Assembly is a direct OEM replacement engineered for high efficiency commercial water heaters and boilers. Designed to maintain precise air fuel ratios, this combustion blower motor ensures stable flame signals and optimal thermal output. As a critical component in the pre mix combustion system, it integrates seamlessly with the control board to modulate airflow based on demand, preventing short cycling and