HOT-WATER SUPPLY DEVICE

Provided is a hot-water supply device which stabilizes hot-water supply even at low water pressure. The processing performed by the hot-water supply device includes a step (S510) of detecting that hot-water supply performed by the hot-water supply device is stopped; a step (S520) of reading a set temperature of the hot-water supply from a memory; a step (S530) of calculating a target opening degree of a total water amount servo based on the read set temperature; a step (S540) of sending, to the total water amount servo, a command for setting an opening degree of a passage through which water flows from the total water amount servo into a heat exchanger to the target opening degree; and a step (S550) in which a stepping motor of the total water amount servo moves in response to the command. 本发明提供一种在低水压时热水供给也稳定的热水供给装置。热水供给装置所执行的处理包括：检测利用热水供给装置的热水供给停止的步骤(S510)；自存储器中读出热水供给的设定温度的步骤(S520)；基于所读出的设定温度来算出总水量伺服系统的目标开度的步骤(S530)；将用以将自总水量伺服系统流入至热交换器的路径的开度设为所述目标开度的指令发送至总水量伺服系统的步骤(S540)；以及总水量伺服系统的步进电动机响应此指令而移动的步骤(S550)。