Flame failure controls

Details Flame failure controls Flame failure controls

G - Physics

05

D

341/20

G05D 23/27 (2006.01) F23N 5/20 (2006.01) F23N 5/18 (2006.01)

Patent

CA 1108723

ABSTRACT OF THE DISCLOSURE Burner control apparatus includes control devices for actu- ating an ignition control means, and a timing circuit for providing an ig- niton timing sequence of four precise intervals. The timing circuit is ac- tuated in response to a request for burner operation and the control devices are energized in sequence and combination in response to the actuated timing circuit. Time sequential pilot flame and main flame stabilization inter- vals are provided. If a signal from the flame sensor is received before the end of the overlapping flame stabilization timing intervals, the control de- vice is energized and if flame detection signal is lost a lockout circuit is energized.

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