| 摘要 |
PROBLEM TO BE SOLVED: To provide a hot water supply system that can avoid as much as possible a situation where failure of a check valve of a bypass water supply passage prevents mixing of water on the water passage side with heated hot water in a hot water storage tank and can appropriately detect failure of the check valve to take measures in response to the detection.SOLUTION: A hot water supply system includes two check valves in a bypass water supply passage. A control device of the hot water supply system detects whether or not an abnormality occurs in any of the check valves on the basis of detection values of a bypass water supply flow rate Wb and a total hot water supply flow rate Wc in a specific condition where a mixing ratio control valve is controlled to a predetermined operating state (STEP 8), and executes abnormality response treatment in accordance with detection of the occurrence of the failure (STEP 10).SELECTED DRAWING: Figure 3 |
