WATER HEATER

PROBLEM TO BE SOLVED: To provide a water heater capable of providing hot water supply, heating and bathing by a single heat source by combining a heat exchanger for hot water supply and a heat exchanger for latent heat recovery, reducing a size and a weight of an apparatus, and improving efficiency. SOLUTION: This one-can multiple-water channel water heater is composed of a hot water supply circulation circuit 19, use-side heat exchangers 18, 27 and a hot water supply circuit 3. Here, a drain connection opening 39 for for connecting dew condensation water generated in the heat exchanger 18 for latent heat recovery to a draining port outside of a machine after neutralizing the dew condensation water by a neutralizing device 38, and an over pressure relief valve 35 for relieving a pressure of the hot water supply circulation circuit 19 to the drain connection opening 39, are mounted, and further a control means 36 is mounted to open the over pressure relief solenoid valve 35 when the use-side heat exchangers 18, 27 are used. COPYRIGHT: (C)2007,JPO&INPIT