Control and method for electric water heater operation

Details Control and method for electric water heater operation Control and method for electric water heater operation

F - Mech Eng,Light,Heat,Weapons

24

H

F24H 9/20 (2006.01) H05B 1/02 (2006.01)

Patent

CA 2314190

A control and method for preventing dry start of an electric water heater provides activation of a bottom heating element for a short time and then senses the temperature to detect the absence or presence of water around the bottom heating element. In the absence of water, the control prevents further activation of the heating element. If water is present, the bottom heating element is activated to heat the water to a set point temperature. An additional upper heating element is activatable only after its temperature falls a predetermined amount below the set point temperature. The control may also include a programmable time having the ability to vary the turn off set point temperature in a predetermined manner during different times of a given day and/or week as well as to provide a convenient way to maintain a reduced turn off set point temperature for an extended period of time.

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