| 摘要 |
PROBLEM TO BE SOLVED: To obtain a hot-water supply apparatus, in which decision can be made as to whether close operation is faulty, even in case of a hot water supply apparatus having no means for detecting the temperature of incoming water. SOLUTION: When both conditions of 'Qantity of incoming water is stable for 15 sec or longerβand 'Heat exchange temperature Th lower than 44 deg.C has continued 1 min or longer' are satisfied at S7, drain may be generated if the situation is left standing as is. Flow steps to S8, where a decision is made as to whether the quantity of incoming water Q is smaller than a reference quantity of incoming water Qj. If the quantity of incoming water Q is smaller than the reference quantity of incoming water Qj, the flow steps to S9 where combustion is stopped, and closing faulty processing is conducted.
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