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COMPONENTS AND FUNCTIONS:
1: Solar pump.
2: Shut-off valves with non-return valve and integrated thermometers
(in the flow and return branch, to prevent reverse flows).
3: Safety unit consisting of:
a- Solar safety valve calibrated to 6 bar.
b- Manometer (0-10 bar).
c- 3/4'' connection for expansion vessel.
4: Flow meter and flow regulator.
The purpose of this element is to balance the primary circuit according
to the number of collectors, as the collectors have an optimum working
flow (approx 1 litre per minute and m2 of collector).
5: Air vent chamber.
Automatic air vents are installed in the collectors, but these must be
closed to prevent the steam from coming out of the vents when the
temperature rises to above 100ºC and the installation being emptied.
A vent chamber is installed so that the air can be purged from an
accessible area. The fluid "with air" flows through the inner pipe and on
expansion the bubbles separate and accumulate in the upper part of the
chamber. The chamber has a manual vent so that the air accumulated is
periodically evacuated.
6: Filling/emptying taps.
7: Expanded polypropylene (EPP) insulating casing.
SOLAR THERMAL CONTROLS
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