| 摘要 |
<p>A pump (7) circulates water through a primary circuit consisting of a boiler (2) and a three way diverter valve (5). A second pump (13) circulates water through a secondary circuit consisting of a calorifier (14) a heater (15) and a mixing valve (16) connected to one of them. The flows and returns (9, 10) of the two circuits are connected together and a bypass (18) is common to both circuits. The pumps are positioned so that they tend to force water through the common bypass in opposite directions.</p> |
