| 摘要 |
PURPOSE: To prevent the waste of water by a method wherein the supply of priming to a circulating pump is not effected at every times when the ON command of automatic operation of an automatic bath boiler is outputted while supplying the priming only when it is necessary. CONSTITUTION: An additional heating circulation passage 14 is connected to a bathtub 1 through a circulation fitting 2. The additional heating circulation passage 14 is connected to a hot-water supplying heat exchanger 5 through a hot-water supplying passage and a hot-water pouring valve 24. A controller 34 is provided with a pipeline washing driving unit and an operation judgement commanding unit therein. The pipeline washing driving unit washes the pipeline by opening the hot-water pouring valve 24 to conduct hot-water in the hot-water supplying heat exchanger 5 side through the additional heating circulation passage 14 when the level of drainage in the bathtub 1 is lowered than the circulating port of the additional heating circulation passage 14. The operation judgment commanding unit commands the supply of priming to a circulating pump 18 only when the pipeline is washed before the ON command of the automatic operation but never supply the pri-ming to the circulating pump 18 except the above-mentioned case and starts the circulating pump 18, then, sends various commands after the additional heating. |
