CPC F24D 19/0092 (2013.01) [F24D 3/18 (2013.01); F24D 17/02 (2013.01); F24D 19/1054 (2013.01); F24H 15/288 (2022.01)] | 20 Claims |
1. A hot water supply apparatus, comprising:
a heat source device;
a tank configured to store water;
a water circuit through which the water in the tank circulates;
a heat exchanger having a first channel connected to the water circuit; and
a controller configured to control the heat source device and the water circuit, wherein
the controller is configured to perform:
a first operation in which the heat source device directly or indirectly heats the water in the first channel of the heat exchanger; and
a second operation in which the heat source device directly or indirectly cools the water in the first channel of the heat exchanger to a temperature which is lower than or equal to a temperature at which scale precipitates after the first operation ends, and
the controller is configured to perform a first determination of whether to perform the second operation according to an amount of scale in the water circuit in the course of the first operation.
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