| 摘要 |
PROBLEM TO BE SOLVED: To appropriately detect the jamming of a secondary water circuit in an indirect heating type water heating system while restraining cost.SOLUTION: A water heating system 100 comprises: a primary water circuit 27 through which the water heated by heat exchange with coolant in a heat exchanger 21 circulates; a secondary water circuit 28 which is connected to the primary water circuit 27 via a heat exchanger 23 and through which water circulates; and a tank 26 which is connected to the secondary water circuit 28 and in which the water circulating through the secondary water circuit 28 is stored. The water heating system 100 detects the temperature of water circulating through the primary water circuit 27 and the temperature of water stored in the tank 26; and when the temperature of the water circulating through the primary water circuit 27 is a first threshold or more as well as when the temperature of the water stored in the tank 26 is a second threshold or less, it gives notice indicating that jamming is produced in the secondary water circuit 28.SELECTED DRAWING: Figure 1 |
