Control means and process for domestic hot water re-circulating

Details Control means and process for domestic hot water re-circulating Control means and process for domestic hot water re-circulating

1984-05-24

1988-06-14

Green, Randall L.

Stoves and furnaces

Liquid heater

Fluid fuel burner for other than top-accessible vessel

417 12, 126 36Z, 237 8A, F24H 100

Patent

active

047504722

ABSTRACT:
A control means and process for a recirculating hot water system having a hot water supply pipe and a hot water return pipe connected in a loop between a hot water outlet of a hot water tank and a return inlet to that tank, and having an electrically controlled recirculating pump in the loop, for keeping sufficient circulation in the loop as to assure substantially instant dispensing of water of a desirably high temperature. The control governs the operability of the recirculating pump, causing it to operate for a pre-established time period as determined by the amount of time required to bring the supply pipe portion of the recirculation loop up to desired maximum operating temperature. After the supply pipe portion of the recirculation loop is brought up to the desired maximum operating temperature, the control switches off the recirculating pump for a pre-established time period determined by the heat-holding capability of the supply side of the recirculating loop, and the minimum desired operating temperature of the supply portion of the recirculating loop.

REFERENCES:
patent: 1780379 (1930-11-01), Durow et al.
patent: 4142515 (1979-03-01), Skaats
patent: 4201518 (1980-05-01), Stevenson
patent: 4298165 (1981-11-01), McKinley
patent: 4420677 (1983-12-01), Partington

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