Viessmann 7871315 Burner Control LGM29.55B6201 WB2A is an electronic control module designed to manage the ignition sequence and burner operation in compatible boiler systems. It works by monitoring operating conditions, controlling ignition timing, verifying flame presence, and coordinating safe burner performance throughout the heating cycle. https://www.partshnc.com/7871315-viessmann-brn-ctrl-lgm2655b6201-wb2a