55
EN
5 MAINTENANCE
m
WARNING
– The maintenance operations described below must
ONLY be carried out the professionally qualified
personnel
who MUST wear
suitable protective safety
equipment.
– Make sure that the system components and pipes
are not hot (risk of burns).
– Periodic maintenance must be carried out every
two years by an authorised technician or by per-
sonnel of the manufacturer’s technical assistance
service.
– Periodic inspections are indispensable for the war-
ranty’s validity.
5.1
General information and maintenance
– The system will reach optimal performance levels two days
after it is installed.
– We recommend regularly inspecting the glass cover of the
collectors and cleaning it if it has dust, snow or anything
else that can interfere with the sun’s rays, checking it for any
cracks on the surface, and replacing it as soon as possible if
damaged.
– Regularly check for the presence of leakages, anomalies on
piping, air bubbles in the system and all piping connections.
– In case of extended periods of inactivity, cover the collectors
to avoid damages to the entire system.
5.1.1
Annual checks
– Check at least once a year all the valves, verify that the bolts
and nuts are properly tightened and check the stability of the
support frame.
– Check that the percentage of glycol in the mixture does not
fall below freezing point; top it up if necessary.
– Check that the pH value of the water and glycol mixture ex-
ceeds 8; if it is lower, add a corrosion inhibitor to the mixture
(the anti-freeze liquid must nonetheless be fully replaced
every 3–4 years).
– Check that the pressure in the collector circuit has not
dropped below the minimum pressure value of the system
(1.5 bar plus the hydrostatic height difference) and, if neces-
sary, integrate the water-anti-freeze liquid mixture when the
system is cold.
– Check the efficiency of the automatic air relief valve:
– loosen the plug and press with a screwdriver. If, be-
sides the liquid, air comes out, the automatic relief
mechanism is not working correctly and the valve
may need to be replaced.
– Check the magnesium anode and replace it if it is
worn. Drain the domestic water contained in the calo-
rifier and unscrew the anode to check its state of wear
5.1.2
Checks every 3/4 years
– Drain the circuit of the collectors and wash it out with water.
– Replace the water and anti-freeze liquid mixture by using
new anti-freeze liquid in the right percentage.