| 摘要 |
PURPOSE:To improve the usage of a title furnace by supplying hot water to a level where circulation heating is possible, replenishing the difference between said supplied hot water and the set amount of water, and thereafter detecting and storing the water level by a water level sensor, and performing automated hot water supply control based upon said stored water level. CONSTITUTION:Upon first use of a title furnace after construction of the same, a user sets the proper amount of water and turns a power supply on. If it is judged that there is no remaining water in a bath tank 6, the user repeats primary hot water supply of the set amount until the hot water reaches a bath tank 6 circulation port. Once water level sensor 26 detects a sufficient circulation flow rate, bath tank water is heated with predetermined heat for a predetermined time, and the amount of the water in the bath tank 6 is calculated on the basis of a hot water temperature change. Hereby, a difference fraction between the calculated water amount and the set amount is secondarily supplied, and hence the set amount of water is dropped. Further, a water level sensor 27 detects the water level at the time the water is boiled to the set temperature, and the detected water level is stored in a control device. Thereafter, automated hot water supply is performed until the water level sensor 27 detects the set water level set by a user on the basis of the stored water level. Hereby, satisfactory automated hot water supply control is assured. |
