| 摘要 |
<p>The central-heating system comprises a boiler connected by supply and return pipes to space heaters. An auxiliary tank (5) connected to the water pipe is also connected to a storage tank (7) with a hot water outlet, while the supply pipe has a section (9) preceding the heaters and in the storage tank, forming a heat-exchanger. The return pipe (4) incorporates, after the heaters, a similar heat-exchanger section (10) mounted in the auxiliary tank. There is a bypass pipe (11) containing a stop valve (12), connecting the supply pipe between the first heat-exchanger and the heaters to the return pipe between the latter and the second heat-exchanger.</p> |
