ā Evacuated Solar Energy Collector Technical Reference
ā Evacuated Solar Energy Collector Technical Reference
ā Evacuated Solar Energy Collector Technical Reference
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Active System with Short Circuit<br />
Installation details<br />
Figure 17 shows an active system incorporating a short circuit. Hot water is only directed to<br />
the tank if the water temperature from the collector is above a set temperature. If not, the<br />
collector water is circulated back through the manifold via a 3-way valve. This type of installation<br />
is recommended where a long distance is between the collector and the hot water storage<br />
tank.<br />
Multiple Tank Installation - Series<br />
F igure 17<br />
For large installations two or more tank s may be connected to the solar sy stem in series (preheat).<br />
Using 3-way valves hot water from the collector passes through Tank 1 first, if the return<br />
temperature is above a set temperature it passes via a 3-way valve to Tank 2 (first pre-heat<br />
tank). Otherwise, it is circulated back to the collector. If water leaving Tank 2 is above a set<br />
temperature it is passed to Tank 3 (second preheat tank). This process may be repeated for a<br />
number of preheat tanks (Figure 18).<br />
F igure 18<br />
16
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