Control system for a gas heated water or air heater

Details Control system for a gas heated water or air heater Control system for a gas heated water or air heater

1982-04-14

1984-03-13

Barrett, Lee E.

Combustion

Timer, programmer, retarder or condition responsive control

By combustion or combustion zone sensor

431 12, 236 15E, F23N 500

Patent

active

044365063

ABSTRACT:
In a control system for a gas heated water or air heater, the use of the supplied fuel gas is to be improved by automatically determining and supplying the amount of air which is required for obtaining complete combustion. A gas control valve feeds a burner with the required amount of gas dependent on the demand of heat. A sensor responding to the content of oxygen or carbon dioxide within the flue gases is located in the stack and the output signal of this sensor is compared with a set point within an electric controller. In case of a control deviation, the output signal of the controller controls an adjustable source of air under pressure formed by a fan with subsequent air control valve in such a manner that the required amount of air for reaching optimum combustion is supplied.

REFERENCES:
patent: 3300133 (1967-01-01), Dines
patent: 3369748 (1968-02-01), Baudelet de Livois
patent: 4251025 (1981-02-01), Ulrich et al.
patent: 4254796 (1981-03-01), Kelly
patent: 4330260 (1982-05-01), Jorgensen et al.

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