| 摘要 |
<p>PURPOSE:To facilitate formation of an electric hot water feeder in a multiple manner by a method wherein a tank having capacity equivalent to a necessary minimum demand quantity of hot water is provided and the area of an installation space is reduced, and a tank is added without varying a program. CONSTITUTION:In a tank 1 on the water feed side, the temperature of feed water is detected as water temperature information by an electronic temperature sensor 26. Based on the water temperature information, computation of at least a boiling up temperature is executed by means of a main control means 27, and control energization to a heater 3 of the tank 1 on the water water side at a frontmost stage is carried out. Meanwhile, in the tank 2 on the feed hot water side, control of energization to a heater 4 is effected by means of a mechanical type temperature sensor 50 operated in response to the hot water temperature of the tank 2. As noted above, boiling up of the tank 1 on the water feed side and that of the tank 2 on the hot water feed side are independently controlled.</p> |
