83
MAINTENANCE
Chapter 11
MAINTENANCE
Correct maintenance of the system, performed regularly by the user and periodically by skilled technicians,
is the essential condition for good functioning and duration of the entire system.
Regular checks by the user
The customer must regularly check the controls described below and inform the technicians in the case of
anomaly.
Check that the pressure on the pump unit manometer with system cold is constantly the same as the
value set.
Check that the temperature diff erence between fl ow and return, during the summer days with strong
insolation is between 10°C and 20°C.
Check that the collector temperature, read on the control unit display and detected by the probe
positioned on the collector is almost the same as the fl ow temperature read on the pump unit red
thermometer. On the contrary it means that the pipes have not been insulated suitably.
Check that the pump starts to function when there is strong solar radiation.
Check that during the night in when the sky is very cloudy that the pump is at a standstill and that
both system fl ow and return (red and blue thermometers) are cold.
Check there is no noise inside the pipe caused by the presence of air bubbles.
If the boiler has a magnesium anode, check the value indicated by the tester by pressing the integrated
button: the pointer must be positioned inside the green fi eld.
Periodical maintenance by skilled technicians
Clean the collectors glass whenever this is very dirty.
Check the concentration of the anti-freeze using the relevant instrument (refractometer) at least once
every 2 years.
Check the level of acidity (PH) of the water and glycol mix inside the system at least once every 2 years:
if PH < 6.6 replace the liquid as it is corrosive.
If the cylinder has a magnesium anode, replace it when the tester indicates its wear (red range).
Check the pressure when the system is cold. If it should be lower than that set integrate fl uid as
described in the “system fi lling” chapter.
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