| 摘要 |
PURPOSE:To stabilize an output hot water temperature in a normal hot water supplying operation and to smoothly vary an output hot water temperature in a fluctuation for a massage. CONSTITUTION:In a controller having a feed water temperature thermistor 32, a feed water flow rate sensor 31, an output hot water temperature thermistor 33 and a feed hot water temperature set switch to control the quantity of heat of a main burner 2, a fluctuating function for varying the quantity of heat of the burner 2 in response to a time change so as to vary a temperature of hot water to be heated by a water heating circuit in response to a time change is provided. In a normal hot water supplying operation, a feedback control is executed based on sensing information of the thermistor 33. In the fluctuation, a control is not executed based on the sensing information of the thermistor 33. |
