| 摘要 |
PURPOSE:To reduce a radiation loss in a time zone having a low heating load, by a method wherein a timer is attached to a hot water temperature control circuit, and the temperature of hot water is automatically controlled depending upon a fluctuation in a heating load. CONSTITUTION:A heat source device 1, which produces hot water, incorporates a heater 3 and a can body 2 which causes the heat of the heater 3 to heat- exchange with hot water. A pump 7, with the aid of which hot water is circulated, and a radiator 8 are interconnected through a hot water piping 9. The temperature of hot water produced by the heat source device 1 is detected by a temperature detector 5. A timer 10 has switching contacts 10a-10c responding to a free set time. Resistors 11, 12, and 13, having different resistance value from each other, are connected to the switching contacts 10a-10c, respectively, of the timer 10. The temperature of hot water responding to a heating load pattern of a day is determined. This enables the temperature of hot water to be automatically changed in accordance with a fluctuation in each heating load. |
