Viessmann 7835169 Ionization Electr. 322838-754 It features a standard 1/4"

It features a standard 1/4" NPT process connection for straightforward mounting and a 1/8" NPT vent for required atmospheric referencing

including glycol-based loops and high-temperature heating water

and commercial unitary systems

Why is my burner failing to ignite despite having 120V at the primary

Viessmann 7835169 Ionization Electr. 322838-754 It features a standard 1/4"The Viessmann 7835169 Ionization Electrode is a critical flame sensing component engineered specifically for high capacity Vitodens 200 W B2HA condensing gas boilers. Designed to handle the rigorous thermal demands of the B2HA 399 and 530 models, this electrode provides the millivolt signal necessary for the burner control unit to verify flame presence safely and consistently. This kit includes the required electrode gasket to ensure a gas tight seal