As an OEM Viessmann part

providing the reliable continuity needed for consistent burner operation

View the blade from the discharge side

verifying the pressure switch trip point is essential for system diagnostics

It is intended for installations where external overcurrent protection is already provided or for specific AHU configurations that do not require an integrated breaker

Browning AK74X1 Sheave 320735-701 As an OEM Viessmann partThe Browning AK74X1 Sheave is a precision engineered v belt pulley designed for fractional horsepower (FHP) applications in demanding HVACR and industrial drive systems. Constructed from close grain cast iron, this single groove sheave is statically balanced to ensure vibration free operation and extended bearing life. It features a 7. 25 inch outside diameter and a 1 inch finished bore equipped with a standard 1 4" x 1 8" keyway and setscrew for