Burner control system with continuous check of hot surface ignit

Combustion – Timer – programmer – retarder or condition responsive control – Sensor of first burner controls second burner – e.g. – pilot...

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431 66, 431 69, 431 74, F23Q 908

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active

054357179

ABSTRACT:
A fuel valve and ignitor control system in which pull-in current for a fuel valve operating on rectified alternating current is supplied through a first normally open relay whose coil is connected in series with normally open contacts of a second relay and an intermittently operating hot surface ignitor. Normally closed contacts of the second relay are connected in series with the ignitor and the fuel valve through a holding resistor, whereby actuation of the second relay provides unrectified alternating current to the ignitor and actuates the first relay to provide pull-in current to the fuel valve, and whereby deactivation of the second relay provides holding current to the fuel valve through the ignitor.

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Honeywell Inc. product information brochure, Form Number 68-0070-1 for S89 and S890 Hot Surface Ignition Modules (Rev. 9-89).

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