| 摘要 |
PROBLEM TO BE SOLVED: To provide a hot water supply capable of preventing erroneous operation of cleaning work at the time of bathtub drainage.SOLUTION: When a state in which a level of bathtub water is lower than a preset reference water level is detected for a prescribed water level monitoring time after the water level of bathtub water is higher than the pre-set reference water level upon additional heating operation or an operation for supplying fresh water to a bathtub 2 and when a water level detecting part 57 detects a higher water level than the reference water level during a water monitoring time, a controller 16 for a hot water supply S reconfirms that the bathtub water is drained and when the water drainage is judged under the re-confirmation, fresh water is supplied to an additional heat exchanger 24 to perform cleaning operation. |
