Flame safeguard sequencer having safe start check

Details Flame safeguard sequencer having safe start check Flame safeguard sequencer having safe start check

F - Mech Eng,Light,Heat,Weapons

23

N

341/19

F23N 5/24 (2006.01) F23N 3/08 (2006.01) F23N 5/20 (2006.01)

Patent

CA 1208740

ABSTRACT OF THE DISCLOSURE A purge time hold circuit is provided in a flame safeguard sequencer to in turn provide a safe start check of a burner control system. If a flame is indi- cated during a prepurge period, the purge time hold means will reset to a zero status and the timer will hold until the signal clears itself. If the flame signal does not clear itself within a preset time, a safety shut down will be commanded.

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