| 摘要 |
PROBLEM TO BE SOLVED: To prevent a trouble such as lowering of detection accuracy in the water level caused by the operation of a heating part for heat demand part by rationally improving a control configuration for detecting the water level of a bathtub. SOLUTION: In the heat supply system, a heat source machine H is provided, in which the heat source machine has a heating part Hb for supplying bath hot water that is connected to a bathtub via a channel Fb for the bathtub, and a heating part Hw for a heat demand part which is connected to a heat demand part W other than the bathtub via a channel Fw for the heat demand part. Also, in the heat supply system, a pressure-detection-type water level sensor 25 for detecting the water level while pressure corresponding to the water level of the bathtub is applied is provided in a channel Fb for the bathtub, and a control means C for controlling the operation of heat source machine H executes water level detection control for detecting the water level based on the detection information of the water level sensor 25 in the state that the operation of the heating part Hb for bath hot-water supply is stopped. The control means C stops the operation of the heating part Hw for the heat demand part on the execution of the water level detection control, at the time when the heating part Hw for the heat demand part is in an operation state.
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