System and method for reduced purge operation of a forced draft

Details System and method for reduced purge operation of a forced draft System and method for reduced purge operation of a forced draft

1993-10-27

1995-03-28

Wayner, William E.

Automatic temperature and humidity regulation

Closed fluid heaters

Top burner control

236 1E, 1224481, 431 12, F23N 108, F22B 3742

Patent

active

054009626

ABSTRACT:
A system and method for controlling operation of a water heater provides generating a heating demand signal which a minimum level corresponds to a required heat input for maintaining water temperature in the water tank in case of no exogenous demand for water. Responsive to the heating demand signal, air flow from the forced draft blower and flow of combustible fluid from the combustible fluid delivery system are varied to produce combustion product over a minimum 15 to 1 ratio. This allows water heating to be varied to meet maximum expected exogenous demand or to maintain water temperature with no exogenous demand.

REFERENCES:
patent: 3469590 (1969-09-01), Barker
patent: 3960320 (1976-06-01), Slater
patent: 4406611 (1983-09-01), Michel
patent: 4519540 (1985-05-01), Boulle et al.
patent: 4676734 (1987-06-01), Foley
patent: 4713525 (1987-12-01), Eastep
patent: 5844335 (1989-07-01), McKinley et al.

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