Burner ignition and control system

Combustion – Timer – programmer – retarder or condition responsive control – Sensor of electrical condition or temperature of electrical...

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431 24, F23M 500

Patent

active

043233422

ABSTRACT:
A dual solenoid burner control system particularly adapted for a gas clothes dryer. A controlled switching element, such as a triac, is advantageously employed in a circuit arrangement which accomplishes the various operational functions required of such circuits, and which permits the use of single-winding solenoid gas valves and a simple single-pole sensing switch for sensing igniter ignition condition or flame heat. The preferred embodiments interrupt gas flow in the event of triac failure, whether open-circuited or short-circuited. In an additional system function, the change in winding impedance as a solenoid valve operates normally is sensed and advantageously utilized to cause the first valve to close in the event the second valve does not properly operate.

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