Control system for a gas furnace, control device therefor and me

Details Control system for a gas furnace, control device therefor and me Control system for a gas furnace, control device therefor and me

1990-11-21

1992-07-07

Yeung, James C.

Combustion

Timer, programmer, retarder or condition responsive control

Sensor of first burner controls second burner, e.g., pilot...

431 60, 431 75, F23Q 908

Patent

active

051278235

ABSTRACT:
A control system for a gas furnace, control device therefor and methods of making the same are provided, the system comprising an electrical circuit that has a metal oxide varistor therein that is adapted to interconnect one end of a secondary winding of a transformer to frame ground only after the potential for sparking is reached at an igniter that is interconnected to the other end of the secondary winding and causes the varistor to break over and cause the igniter to spark.

REFERENCES:
patent: 4455589 (1984-06-01), Riordan et al.
patent: 4842510 (1989-06-01), Grunden et al.
patent: 4865539 (1989-09-01), Geary
patent: 4915614 (1990-04-01), Geary
patent: 4978292 (1990-12-01), Donnelly

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