By replacing the field-serviceable cartridge rather than the entire unit

Industrial Durability: Lightweight yet robust aluminum construction designed for low-pressure gas manifold service

Stable Control Power: Provides a clean 24VAC signal to sensitive electronics

It features an opening point range of 70 to 260 PSI

and counterclockwise (CCW) rotation

Viessmann 7134328 Circuit Board 323269-701 By replacing the field-serviceable cartridgeThe Viessmann 7134328 is a critical VR20 control board specifically engineered for Vitodens 200 WB2 and WB2A series gas condensing boilers. Functioning as a high precision communication interface, this replacement circuit board facilitates data transfer between the LGM 29 burner control unit and the main system sensors. It is essential for managing boiler fault codes such as A1, A4, and outdoor temperature sensor malfunctions. Field replacement