Two stage furnace control

Details Two stage furnace control Two stage furnace control

1990-02-09

1993-02-16

Tanner, Harry B.

Automatic temperature and humidity regulation

Hot-air furnace

Air and fire control

431 19, F23N 100

Patent

active

051863863

ABSTRACT:
The present invention discloses a two stage furnace control. The control includes a gas valve, an ignitor, a low pressure switch, a high pressure switch and a control unit for enabling the inducer fan, the circulator fan, the ignitor, and the gas valve. The gas valve is coupled in series with the low pressure switch, the high pressure switch, and the power source whereby the low and high pressure switches directly control supply of electric power to the gas valve.

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