| 摘要 |
PROBLEM TO BE SOLVED: To provide a compact and efficient hot water supply system.SOLUTION: There is provided a function to supply hot water by heating hot water from a hot water storage tank 120 to be heated by a heating element 2 further with a heat source device 130. The heat source device 130 is provided with a heating circuit connected to a heating system, such as a hot water mat 10. There are provided route switching control means which switches a route via a hot water storage tank side which circulates a heat medium led by a heating heat exchanger 28 first through a hot water storage tank heating heat exchanger 125 for heating the hot water storage tank 120 and then through the heating heat exchanger 28 side after leading the medium from the heating system and a main circulation passage which circulates the heat medium by directly passing it through the heating heat exchanger 28 side without through the hot water storage tank heating heat exchanger 125 by switching or the like of a three-way valve 141. The route switching control means circulates the heat medium in the route via a hot water storage tank side when a pre-determined heating-use hot water storage tank heating set condition during maintenance of the heating element 2, for example, is satisfied.SELECTED DRAWING: Figure 1 |
