| 摘要 |
A water heating system for a number of apartments or offices (10 ) each having a water store (15) for receiving hot water from a common boiler (12). The system includes a temperature sensor (S2) for sensing the temperature of incoming water from the boiler, a valve (V1) between the temperature sensor (S2) and the water store (15). A further temperature sensor (S1) senses the temperature of water within the store (15) and an electronic controller (30) controls the flow of water via the valves (V1, V2) dependent on the temperature detected by both the first and second sensors to prevent water being received by the store when the temperature differential is too small. This avoids the risk of reduction of the water temperature within the store and meter (21) will not register utilisation under these circumstances as valve (V2) allows the return of the water other than via store (15).
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