| 摘要 |
<p>The heating circuit has a three way mixer valve (3b) between the boiler (1) and the feed line (7) supplying parallel underfloor heating sections (a, b, c). This valve can be controlled by an outside temperature sensor (4). Between the supply and return lines, (6, 7) near the valve (3b) can be installed on differential pressure regulating valve (5). Each heating section, includes a by-pass unit (9a, b, c). This unit can have a manually or automatically operated two way valve, possibly operated by a time switch. This can be in parallel with another feed line. The unit then controls the individual flow through each section, to suit a selected temperature range.</p> |
