PROBLEM TO BE SOLVED: To permit the setting of hot-water filling condition smoothly by a memory mode in spite of the connecting height to a bathtub in an additional heating circulation passage. ;SOLUTION: A hot-water pouring control unit 26 pours the hot-water of a set initial period hot-water pouring amount, stored in an initial period hot-water pouring amount memory unit 28, upon starting the hot-water filling operation of memory mode for setting a hot-water filling condition, and, thereafter, drives a circulation pump 18 to effect hot-water pouring to a set water level in accordance with a hot-water pouring operation procedure after confirming that the flow of hot-water in a bathtub is not detected by an additional heating water flow switch 16, however, when the flow of hot-water is detected by the additional heating flow water switch 16, the set initial period hot-water pouring amount, stored in the initial pouring hot-water amount memory unit 28, is renewed to a smaller water amount value to make ready for the hot-water filling operation of the memory mode of next time.;COPYRIGHT: (C)1997,JPO
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