| 摘要 |
<p>The central heating system for a household, his the boiler located in e.g. the cellar and a distributor box for the supply and return lines mounted in the attic. The lines between this box and the radiators are flexible tubes. The box has a base with main supply and return tubes supported above it by clips. These tubes have connections for the branch lines to the radiators. Each tube carries a gas release valve and a cover fits over the top. All round the interior of the cover are fitted insulation panels. After leaving the box, the flexible tubes pass through protective sleeves embedded in a supporting plate. The base of the box has an outlet in the middle of its sloping base sheet, with a connection for a tube which carries condensate back to the boiler.</p> |
