Flame safeguard sequencer having interlock checking means

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

1983-01-31

1984-05-29

Scott, Samuel

Combustion

With indicator or inspection means

Correlated with action of condition responsive burner control

431 18, 431 24, F23N 524

Patent

active

044512252

ABSTRACT:
A flame safeguard sequencer incorporates an interlock checking means that verifies the proper status of the start or preignition interlocks in the burner system 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 (typically 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.

REFERENCES:
patent: 3644748 (1972-02-01), Lord
patent: 3814569 (1974-06-01), Jacobsz
patent: 4116613 (1978-09-01), Matthews
patent: 4399537 (1983-08-01), Jones

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