| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a hot water storage type hot water supply apparatus that can execute normal reheating operation by determining whether abnormality of a temperature sensor is present or not when starting heat exchange operation with an external liquid. <P>SOLUTION: In this hot water storage type hot water supply apparatus, a stored hot water circulation circuit 6 is provided with a circulation flow regulating valve 9 regulating a circulation flow rate. When starting the heat exchange operation with bathtub water (the external liquid), a control part 50 fully closes the circulation flow regulating valve 9, and operates a circulation pump 12 of a bathtub water (external liquid) circulation circuit 11. When a temperature difference detected by a bathtub water inlet temperature sensor 15c and a bathtub water outlet temperature sensor 15d on the inlet side of a heat exchanger 7 and on the outlet side, the control part 50 decides that the temperature sensor 15c or 15d is abnormal and forbids the heat exchange operation with the bathtub water (the external liquid). <P>COPYRIGHT: (C)2004,JPO</p> |
