the 800-0221 is calibrated for the specific thermal expansion requirements of Bard HVAC units

Technicians should check for 24VAC at the valve terminals during the ignition trial

Because this is a variable speed DC motor

" this OEM control board reduces the mechanical load on expensive components like compressors and blower motors

When should the cover gaskets be replaced

Hydrotherm BM-8787 Pilot Assembly 318172-701 the 800-0221 is calibrated forFor service technicians maintaining legacy hydronic systems, the Hydrotherm BM 8787 Pilot Assembly is a direct replacement OEM component designed to restore reliable ignition in Hydrotherm boilers and water heaters. As a complete pilot burner assembly, the BM 8787 includes the specialized bracketry, pilot orifice, and thermocouple connection necessary to interface with your existing gas valve. Precision engineered for high temperature durability, this