| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a hot water supply system capable of suppressing the occurrence of excessive operation time.SOLUTION: A hot water supply system 10 comprises: a hot water storage tank 40; a water supply line 12; a heat source unit 30; a hot water tapping line 14; a hot water utilization part 50; a hot water circulation passage 16; and a control part 60. The control part has a target value input part 61 and a target value setting part 62. The control part monitors a hot water tapping temperature, which is a temperature of hot water flowing in the hot water tapping line, and a hot water circulation temperature, which is a temperature of hot water flowing in the hot water circulation passage. The control part controls the hot water tapping temperature so that it does not become lower than a hot water tapping temperature target value, which is a target value of the hot water tapping temperature, and controls the hot water circulation temperature so that it does not become lower than a hot water circulation temperature target value, which is a target value of the hot water circulation temperature. When an input hot water tapping temperature target value is equal to or lower than an input hot water circulation temperature target value, the control part sets at least one of the hot water tapping temperature target value and the hot water circulation temperature target value, so that the hot water tapping temperature target value becomes equal to or higher than the hot water circulation temperature target value.</p> |
