The Fireye Bi-Flame Monitoring System (BF22P1211-FR and BF22P1212-FR) controls the startup sequence and monitors the flame of two individual gas, oil, or combination gas/oil burners connected to a common valve train. Its dynamic onboard testing checks for faulty relays, proof of valve closure, high and low fire switch interlocks, and shorted air switch. It’s dip switches allow sequence and timing functions, as well as system configuration. It is also capable of modulation (high and low fire purging) and monitoring up to four auxiliary inputs. It is UL recognized in the US and Canada, and FM approved.