do not use it for water service

This precise negative pressure gas valve manages the fuel-to-air ratio

Designed specifically for Armstrong Air and AirEase equipment

proving fan operation

Lochinvar & A.O. Smith 100111022 VFD Assembly 326010-701 do not use it forThe Lochinvar & A. O. Smith 100111022 VFD Assembly is a high performance variable frequency drive engineered for precise motor speed control in high efficiency commercial water heaters, specifically the Cyclone BTH 400 and BTH 500 series. This OEM replacement part (formerly 9006245005) is vital for modulating the blower motor to match varying load demands, significantly enhancing energy efficiency and reducing operational wear on internal components.