| 摘要 |
PROBLEM TO BE SOLVED: To provide a one-can multiwater channel type hot water supplier, where the maximum number on the side of hot water supply does not change between the time of single use and the time of simultaneous use and moreover stable hot water supply capacity can be obtained, regardless of the water temperature on the side of reheating at simultaneous use. SOLUTION: A burner 12, capable of achieving a specified maximum number on the side of a hot water supply passage, even if the water temperature in an reheating passage 40 is lower by 20 deg.C than that in it at simultaneous use, is prepared. The maximum quantity of heating at single use for hot water supply is set lower than that at simultaneous use, so that the number at single use for hot water supply may accord with the previous maximum number. A heating control means 71 controls the quantity of combustion so that the temperature of delivered hot water may come to a set temperature within the range of the set maximum quantity of heating. A use condition judging means 73 measures the maximum number at single use for hot water supply, and obtains allowable flow rate from the relation of an allowable flow rate=actual meaurement×25÷(set temperature-incoming water temperature), at simultaneous use, and in the case that the flow rate on hot water supply side exceeds this, it lowers the flow rate by throttling a flow control valve 30.
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