Gas burner control system

Details Gas burner control system Gas burner control system

1977-01-19

1978-04-04

Dority, Jr., Carroll B.

Combustion

Timer, programmer, retarder or condition responsive control

With test circuit checking or analyzing flame sensing...

431 46, F23Q 908

Patent

active

040824934

ABSTRACT:
A system for controlling the pilot and main burner gas valves of a gas furnace or the like, including a pilot spark ignitor and a pilot flame sensor. A system with both pilot and main burners normally off, with the pilot burner being turned on when the thermostat switch closes and with the main burner being turned on when the pilot flame is established, with the main burner being turned off whenever the pilot flame goes out. An electronic circuit with the flame sensor as an input for switching the main burner valve solenoid on and off, with the electronic circuit having a fail safe configuration such that failure of any component between the flame sensor and the relay controlling the main valve solenoid will result in the solenoid being unenergized.

REFERENCES:
patent: 3449055 (1969-06-01), Blackett
patent: 3574495 (1971-04-01), Landis
patent: 4000961 (1977-01-01), Mandock

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