| 摘要 |
PURPOSE:To eliminate an erroneous detection of the remaining water in a bathtub due to drop of water of a circulation tube at the time of draining the bathtub in the case of filling the bathtub with hot water and to eliminate a deviation of a hot water filling level. CONSTITUTION:A water level monitor 17 is provided. When it detects in a predetermined sequence that a water level in a bathtub 7 is higher than a circulation adapter 8, it turns ON a water level signal, then monitors a water level, and turns OFF the water level signal when the level is lower than a reference level. At the time of filling with hot water, a hot water filling sequence corresponding to the state of the water level signal is selected depending on whether water remains in the bathtub. Accordingly, when the level in the bathtub becomes lower than a position of the adapter, accurate detection of the remaining water can be executed at the time of starting an operation of a timer even if an error occurs in the case of detecting the level in the bathtub due to drainage of the water fully filled in a circulation tube when the bathtub is drained by an installation work, and hot water filling, a timer operation can be accurately conducted. |
