The Siemens Combustion LMV37.420A1 Burner Control Unit is an advanced control module designed to manage burner operation in compatible commercial and industrial HVAC heating systems. Operating on 110V, 50–60Hz power, it works by monitoring and coordinating ignition, fuel delivery, combustion, flame supervision, and safety functions for efficient burner performance. Commonly used with ... https://www.partshnc.com/lmv37420a1-siemens-combustion-control-unit-110v-50-60hz