The Heylo 1420021 is an original equipment manufacturer (OEM) oil burner control unit, specifically the Danfoss BHO 72.10 (Danfoss part number 057H6102). This control unit is essential for managing and monitoring oil burners in various heating systems, ensuring safe and efficient operation. It is designed for intermittent operation oil atomizing burners and provides critical functions such as flame supervision, ignition sequence control, and safety lockout in case of malfunction. Ideal for maintaining Heylo heating equipment and ensuring optimal performance and safety.