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8.7 LIST OF ANOMALIES FOR FORCED CIRCULATION SYSTEMS
8.6 SYSTEM INSPECTION AND MAINTENANCE
FORCED CIRCULATION
The solar collector does not require particular maintenance, it is
essential to carry out a periodic visual check of the collector itself
(cleaning or absence of damage or breakages) and a check of
the fixings and fittings.
In case of accidental leaks from the collector, the repair can
bedone with a normal copper welding (contact the manufacturer
for advice).
Periodically check that the system pressure remains constant
during normal operation.
Check every year (at the beginning of winter) the concentration
of antifreeze liquid with the appropriate tool that the limit value of
-26 °C is not exceeded.
Check the pH of the antifreeze solution every year (it must be
pH> 7.0).
In any case, the antifreeze fluid must be replaced every 5 years.
If there are noises inside the circuit, check and eliminate anyì
residual air present.
Check the integrity of the anti-corrosion anode in the boiler.
Pump operation: check that the pump starts running in the night /
day passage (presence of solar radiation) and that it stops in the
reverse passages.
If there is a difference between delivery and return of the circuit
greater than 60 °C, adjust the pump flow rate.
Never fill the circuit with water only.
Failed inspections and maintenance can cause damage to the
system and to people, animals or things for which the
manufacturer cannot be held responsible.
The checks must be carried out by an authorized technician
during the annual checks.
ACTIONS ABSOLUTELY FORBIDDEN
FORCED CIRCULATION
The automatic filling of cold water into the circuit is absolutely
forbidden to avoid breakage due to freezing.
There is no warranty coverage.
It is absolutely forbidden to intercept expansion vessels, solar
collectors and safety valves with valves.
It is absolutely forbidden to operate the solar circulator manually
at night or empty, as it causes condensation or problems in the
circulator.
It is absolutely forbidden to install the system yourself without the
help of a qualified installer.
It is absolutely forbidden not to adequately fix the frame to the
underlying structure.
It is absolutely forbidden to put outside or to the elements
anything that is not specifically suitable for the outside, such as:
kettles, electrical equipment, expansion vessels, etc ...
ELENCO ANOMALIE
POSSIBLE CAUSES
POSSIBLE SOLUTIONS
Loss of pressure in the manifold circuit
Loss of any jolly valves present
Water leakage in the circuit due to broken fittings / pipes.
Anomalous leakage of fl uid from the safety valve
Replace the jolly valves with manual relief valves.
Replace the safety valves
Abnormal fluid leaks from the safety valve
Insufficient or damaged expansion vessels Incorrect
pre-charge pressure in the expansion vessel
Incorrect sizing of the collector circuit flow rate
Safety valve failure
Replace or increase the expansion vessels
Remove pressure in the system and put the vessels back
under pressure
Replace the safety valve
Failure of the pump
No mains voltage
Reaching limit temperature of the storage tank or collector
Breakage of collector or storage tank temperature probe
Check the electronic control unit
The control unit manages the limit temperature, everything
will be reset when the temperatures have dropped. Probes
replacement
No hot fluid arriving from the manifold but the pump
is running
Shut-off valves and / or non-return valves closed
Presence of air in the collector circuit
Steam formation in the collector circuit
(pump start delay or fluid flow too low)
Exhaust by means of the manual air vent.
With cold circuit, remove air
Pump start-up delay
Wrong electronic control unit settings.
Inversion of the probes during assembly
Check the settings of the electronic control unit again
Excessive kettle cooling
Non-return valve faulty, the boiler heat rises to the panel)
DHW recirculation pump always running
(where it exists)
Kettle not properly insulated
Check the non-return valve.
Set the recirculation usage time less frequently
(Kettle not supplied by the parent company), isolate the
kettle
Condensation in the panels
Check valve not working, the boiler heat rises to the
panel
Pump on also at night
Reset the operation of the solar circulator to automatic
and not manual.
LIST OF ANOMALIES
