Draining an electric water heater ensures that it is in good working order and saves on the energy bill. This operation is possible in a few simple steps as described in this new post.
Domestic water flows through a coil or plate heat exchanger located in the heating element. The opening of a hot water tap closes a vacuum contactor, usually resulting in :
– The burner (or resistors) is ignited and transmits its calories to the domestic water through the exchanger;
– the heating circuit may be temporarily stopped to devote all the available energy to heat the domestic water.
Closing the tap restores the previous situation.
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