| 摘要 |
PURPOSE:To prevent excess or insufficiency by previously pouring a predetermined quantity of water in a bathtub, then deciding whether a circulation pump is driven to circulate in an additional combustion circulation passage or not, and pouring an insufficient quantity of water to be poured as compared with set quantity to be poured at the time of no circulation or less than maximum quantity of hot water. CONSTITUTION:When a pouring quantity and a temperature of hot water of a bath are set by a remote controller 80 and an automatic operation is started, a controller 70 instructs an automatic hot water level retention of the bath. Then, a small predetermined quantity of hot water such as 10 liters is first monitored by a pouring water quantity sensor 62, and poured in a bathtub 10. Thereafter, a circulation pump 21 is driven for a predetermined period, and whether water of the bathtub 10 is circulated in circulation passages 31, 32 or not is decided by a water flow switch 23. If the circulated and poured quantity of hot water is equal to or more than a maximum quantity of hot water stored so far, the pouring is finished, and a combustion is performed. After the combustion is finished, the controller 80 displays an error of the gist indicating substantially no pouring and error setting. |
