Modular tankless water heater control circuitry and method...

Details Modular tankless water heater control circuitry and method... Modular tankless water heater control circuitry and method...

2007-01-16

2007-01-16

Campbell, Thor S. (Department: 3742)

Electric resistance heating devices

Heating devices

Tank or container type liquid heater

C392S466000, C219S497000

Reexamination Certificate

active

11080120

ABSTRACT:
Control circuitry is disclosed for use with a tankless water heater system including a plurality of water conduits connected in series. The control circuitry includes a plurality of water heater elements, one each associated with each of the plurality of water conduits. A controller includes a central processing unit (CPU) with an operating program and each of the plurality of water heater elements are coupled to the CPU. The CPU is programmed to individually activate one of the water heater elements to a predetermined power level in response to a demand for heated water. The number of water heater elements activated and the power level of the activation is determined by the demand for heated water.

REFERENCES:
patent: 4436983 (1984-03-01), Solobay
patent: 5216743 (1993-06-01), Seitz
patent: 6389226 (2002-05-01), Neale et al.

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