| 摘要 |
PROBLEM TO BE SOLVED: To prevent discharge of cooled hot-water upon supplying hot-water after supplementing water, by a method wherein bath hot-water is circulated through the circulating passage for heating bath hot-water to mix hot-water in a bathtub after finishing the supplementation of water, then, the hot-water in the circulating passage is replaced with the bath hot-water in the bathtub, and a burner is burnt for a predetermined period of time to raise the temperature of a hot-water supplying heat exchanger. SOLUTION: A hot-water filling solenoid valve 17 is closed and, subsequently, a condition that a hot-water and water mixing valve 7 is at a position of hot-water side totally closed position is released, then, a condition that a water amount proportional valve 9 is at the finishing position of hot-water filling is released and, subsequently, a circulating pump 13 is excited. Next, whether a bath water flow switch 27 is put ON or not is checked and when it is NO, the excitation of the bath water flow switch 27 is waited for a predetermined period of time. When it is Yes, the combustion of a burner is started and the temperature of the bath heat exchanger is raised. In this case, when a hot-water supplier is one-boiler two-water passage hot-water supplier, a bath heating system is connected thermally to a supplying hot-water heating system and, therefore, the supplying hot-water heating system can be provided with the heat of bath hot-water by the circulation of the bath hot-water in a bathtub without burning the burner. |
