| 摘要 |
PROBLEM TO BE SOLVED: To supply a constant amount of hot water at a prescribed temperature to a user side by providing a hot water producer for heating hot water introduced from a hot water storage tank and returning it to the hot water storage tank and a hot water supply passage for supplying the hot water of the hot water storage tank to the user. SOLUTION: When the water level in a hot water storage tank 1 detected by the first and second electrodes 81 and 82 of a level sensor 8 is located at a prescribed high water level, a water supply electric valve 6 is first closed based on a command from a controller 17. Further, a second drive pump 10 is driven by the controller 17 to always circulate hot water between the tank 1 and a hot water producer 2. This circulation allows hot water heated to a prescribed temperature by the hot water producer 2 to be supplied to the tank 1. Then, a first pump is driven so that hot water in the tank 1 is supplied to a user U from a hot water supply passage 3. In this case, the first pump can freely set the capacity of the hot water producer 2, so that a large amount of hot water at the prescribed temperature can be supplied. |
