| 摘要 |
PURPOSE:To maintain a set temperature and to improve the stability of the temperature of hot water from an instantaneous hot water feeder by a method wherein a water quantity adjust valve is operated at the time of starting the hot water feeder and a capacity control device is operated during the operation of the hot water feeder. CONSTITUTION:A heat exchanger 1 is heated by a heating device 5 comprising a burner and the calorific value of the heating device is varied by a capacity control device 6. A water quantity adjust valve 10 adjusts the flow rate of hot water in a heating passage 2 and that of hot water in a bypass passage 3. In case where many faucets are used at the time of starting the hot water feeder, the water quantity adjust valve 10 is operated by a control circuit 12 so that the entire water quantity is controlled to keep the set temperature and the machine is operated with the maximum capacity. When the water quantity increases instantaneously during the use of the hot water feeder, the heating capacity of the hot water feeder is increased in response to a signal from a flow rate detector 9 to thereby reduce the transitional change in the hot water temperature and at the same time, the capacity control device 6 is driven so as to maintain the set temperature through the signal from a hot water temperature detector 8. |
