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b
All pipes in the water circuit must be insulated in
conformity to relevant standards. Lagging and insu-
lation must be protected against damage by the
weather and birds and animals.
Angle of collectors / General
Solar collectors are designed to be installed at angles of
between 15° (minimum) and 75° (maximum).
Make sure that the bleed and vent valves of the collectors
remain open while the collectors are being installed.
Take care to protect all fittings, connections, bleed and
vent valves against dirt and dust etc..
In installations which serve primarily to produce domestic
hot water in the summer, install the collectors facing from
east to west at an angle of between 20 and 60°. The ideal
orientation is southwards, at an angle equal to the latitude
of the location minus 10°.
If the system sustains the greatest thermal load in the
winter (as in systems that combine domestic hot water
production with central heating), install the collectors
facing south (or south-east or south-west) at an angle
greater than 35°. The ideal orientation is southwards, at
an angle equal to the latitude of the location plus 10°.
Flushing and filling
For safety reasons, the solar collector must be covered,
using the packaging it came in, for at least two hours
before it can be filled.
In areas liable to frost, fill the collector with an anti-freeze
heat transfer fluid.
b
DO NOT ADD WATER TO THE GLYCOL PREMIX.
The anti-freeze supplied for use with solar collectors
comes ready to use. IT MUST NOT BE MIXED WITH
WATER.
b
Take care if you flush the system out, because water
trapped inside the circuit before filling with glycol
premix may freeze.
Bleeding
Bleed the circuit:
- On startup (after initial filling) (see the figure on page
16).
- Whenever necessary, as in the event of system mal-
functioning.
Make quite sure that all air has been bled out of the sys-
tem.
b
Risk of burns from hot fluid inside the collectors!
b
Only open the vent valve if the temperature of the
fluid in the circuit is below 60°C.
Make sure that the collectors are not hot before you
start bleeding the circuit. Always cover the solar
collectors before bleeding the circuit. Always per-
form bleeding in the morning.
Checking the heat transfer liquid
Check the anti-freeze effect and the pH level of the heat
transfer liquid every 2 years.
- Use an instrument like a refractometer or densimeter
to check the anti-freeze effect: if the fluid's density dif-
fers from that declared in the manufacturer's technical
specifications, replace the anti-freeze fluid.
- Check the pH of the anti-freeze fluid using litmus
paper: if measured pH differs from that specified in
the manufacturer's technical specifications, replace the
anti-freeze fluid.
b
At the end of its useful life, dispose of the product in
compliance with applicable legislation.
15
FOR THE INSTALLER
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