Flame safeguard sequencer having interlock checking means

Details Flame safeguard sequencer having interlock checking means Flame safeguard sequencer having interlock checking means

F - Mech Eng,Light,Heat,Weapons

23

N

158/55

F23N 5/12 (2006.01) F23N 3/08 (2006.01) F23N 5/20 (2006.01)

Patent

CA 1206863

ABSTRACT OF THE DISCLOSURE A flame safeguard sequencer incorporates an interlock checking means that verifies the proper status of the start or preignition interlocks in the burner sys- tem and the run interlocks of the burner system. In the event that an interlock opens during a period of time when it should not be open, the system can limit the operation of the sequence to a short time period (typi- cally 30 seconds) to allow the interlock to reestablish a normal running state. If the correct state is reestablished, the system continues normal operation. If the correct state is not reestablished, the system is shut down on safety and a coded fault-hold indicator advises a serviceman of where to find the problem.

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