| 摘要 |
The heater has a lagged tank (1) heated by a heat exchanger (12). A three-way valve (16) which communicates with this tank's cold water discharge (4), cold water inlet (18) and a circulating pump (17). The lowermost region (15) of an additional tank (23) may be connected directly to the cold water inlet. The three-way valve is connected by a wire (22) to a control unit (7) which is connected to a temperature sensor (29) located in the centre of the additional tank. |
