Viessmann 7134328 Circuit Board 321702-401 The ZP charge provides a

The ZP charge provides a Maximum Operating Pressure (MOP) of 35 psig

this is a self-contained pilot that operates using the energy of the steam itself

Always verify the actuator size matches the 13

Ensure critical circuit protection for commercial and residential HVAC systems with the York 025-34430-000

preventing pressure creep during periods of zero gas demand

Viessmann 7134328 Circuit Board 321702-401 The ZP charge provides aThe 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