| 摘要 |
PURPOSE:To prevent malfunction by a constitution wherein a water circulating pump for space heating is put into drive after a certain period of time since the stoppage of the single hot water supplying operation in the titled device, which is equipped with both a hot water supplying heat exchanger and a space heating heat exchanger capable of driving singly and simultaneously. CONSTITUTION:Hot water is supplied by opening solenoid valves 12a and 13a, the openings of which are respectively done by energizing a first relay 20 and a second relay 22 as the result of the closing of a starting switch 33 and an operating switch 18 of a hot water supplying device 1a. When the operating switch 18 is open, solenoid valves 12 and 13 are closed, resulting in stopping hot water supply and putting a timer 38 into operation. Consequently, a pump 8 is put into drive after the period of time determined by a timer 38. Because the pump is put into operation after the stoppage of the hot water supplying device due to the constitution as mentioned above, the influence of surge current or the like due to the driving of the pump can be eliminated, resulting in preventing malfunction. |
