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200SE-2S - 300SE-2S
M001704-A
26/04/2016 - 7607575-05
4 If different copper pipes are used, the insulation must be:
- Resistant to constant temperatures up to 150 °C in the collector
zone and the hot outlet and also down to - 30 °C.
- Insulation preferably waterproof and continuous.
- with a thickness equal to the tube diameter and with a K
coefficient of 0.04 W/mK.
50 % reduction of the insulation is permitted when passing
through the roof and walls.
4 Recommended materials for temperatures up to 150 °C:
- Armaflex HT
- mineral wool
- glass fibre
n Solar expansion vessel
4 The expansion vessel compensates for variations in the volume
of heat transporting fluid caused by temperature variations. The
total amount of heat transporting fluid in the collector is absorbed
when the safety of the installation is compromised (power cut in
full sunshine) and when the installation reaches its shutdown
temperature. In this case, some of the heat transporting fluid is
converted into gas and moves the fluid from the collector to the
expansion vessel. As the collector no longer contains any heat
transporting fluid, the installation is no longer at risk. If, at the end
of the afternoon, for example, the temperature drops, the gas
undergoes a condensation process and is converted back into
heat transporting fluid.
4 The pre-inflation pressure in the expansion vessel pushes the heat
transporting fluid back to the collector. On start-up after
installation, a degassing process, which lasts 3 min, is initiated.
Any air bubbles present are picked up and evacuated by the
Airstop system. The installation is once again fully operational.
4 Expansion vessels are resistant to the heat transporting fluid and
are selected primarily according to the number of collectors. When
the number of solar collectors is high, the expansion vessels are
mounted in parallel.
4. Installation
29
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