Control device for a warm air furnace

Details Control device for a warm air furnace Control device for a warm air furnace

1977-05-11

1979-02-20

Wayner, William E.

Automatic temperature and humidity regulation

Hot-air furnace

Air and fire control

G05D 2300

Patent

active

041402740

ABSTRACT:
Control apparatus for regulating the operation of a warm air furnace having a conventional thermostat control arranged to turn the furnace burner on and off. Circuit means are arranged to override the thermostat to turn the burner off when the temperature of the flue gases leaving the furnace are above a first level and to hold the burner inactive until the flue temperature drops to a second lower level. A bypass circuit is also provided to hold the burner in operation anytime conditioned air returned to the furnace from the comfort zone falls below a predetermined temperature.

REFERENCES:
patent: 2245773 (1941-06-01), Grant
patent: 2262823 (1941-11-01), Stearns
patent: 2289206 (1942-07-01), Nessell
patent: 2292830 (1942-08-01), Gauger et al.
patent: 2704571 (1955-03-01), Reichelderfer
patent: 2862666 (1958-12-01), Kriechbaum

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