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Can this controller be used on single-phase motors
Is a transformer required for operation
preventing pressure creep during periods of zero gas demand
making it ideal for standardizing your HVAC compressor service
generic sensors often lead to inaccurate readings and efficiency loss
Viessmann 7134328 Circuit Board 321702-401 Can this controller be usedThe 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
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