| 摘要 |
Disclosed is a hot water supplying system of a boiler equipped with a double pipe heat exchanger, which can normally perform a heating operation in the boiler having the double pipe heat exchanger, in which an outer pipe used for a hot water pathway and an inner pipe used for a heating water pathway are installed, under a circumstance where water supply is stopped. The hot water supplying system includes: a double pipe heat exchanger including an outer pipe to which combustion heat is directly transferred from a burner of a combustion chamber; a cold water pipe for supplying water to the outer pipe of the heat exchanger; and a hot water supplying pipe through which water is discharged from the outer pipe of the heat exchanger, wherein a backflow cutoff valve and a pressure absorbing device are mounted on the cold water pipe. The hot water supplying system is provided with the backflow cutoff valve and the pressure absorbing device, thereby normally performing an operation of heating rooms under a circumstance where water supply is interrupted.
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