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8.5 Magnesium anodes
The magnesium anode (Mg), also called "sacrificial"
anode, avoids any parasitic currents that are generated
inside the boiler that can trigger corrosion processes on
the device surface.
In fact, magnesium is a metal with a lower electrochemical
potential when compared to the material that lines the
inside of the boiler, therefore it first attracts the negative
charges that form with the heating of the water and that
cause it to corrode. Therefore, the anode "sacrifices" itself
by corroding instead of the tank. The boiler has two
anodes, one that has been mounted in the lower part and
another in the upper part of the tank (the area that is most
subject to corrosion).
The integrity of the magnesium anodes must be checked
at least every two years (even better if checked on an
annual basis). The operation must be carried out by
qualified personnel. Before performing the inspection, it is
necessary to: • Close the cold water input supply;
•
Empty the water from the boiler (see paragraph
8.5);
•
Unscrew the upper anode and check its state of
corrosion, if more than 30% of the anode surface is
corroded then it is necessary to replace it;
•
Carry out the same operation for the lower
anode.
The anodes have appropriate sealing gaskets, in order to
avoid causing water leaks, it is recommended to use
anaerobic sealant for threads compatible for use on
sanitary and heating systems. The gaskets must be
substituted both in case of inspection as well as the
replacement of anodes with new gaskets
8.6. Emptying the boiler
It is advisable to drain the water from inside the boiler if
the boiler is idle for a certain period of time, especially in
low temperatures.
As for the equipment in question, it is sufficient to
disconnect the water supply input connection (see
paragraph 5.4).
Alternatively, during the system installation stage, it is
advisable to install a drain tapwith a hoseholding
connection.
N.B.: It is important to empty the
system in case of low temperatures in
order to avoid the water freezing.
9. TROUBLESHOOTING
In case of problems of equipment performance, without
the occurrence of any of the alarms or errors described in
the relative paragraphs, it is advisable to check to see if
the problem can be easily solved by checking the possible
solutions specified in the table below prior to seeking
technical assistance.
Problem
The heat pump does
not work
The compressor and/or
the fan do not work
The heat pump contin-
uously switches itself on
and off
The heat pump remains
continuously switched on
and does not switch off
The
electric
heating
element does not switch
on
WARNING!
operator does not succeed in solving
the problem, switch off the equipment
and
seek
specifying the device model purchased.
Possible causes
There is no electricity;
The plug is not correctly
inserted in the socket.
The set safety period of
time has not finished;
The
scheduled
temperature
has
reached.
Wrong programming of
the
parame-
ters/setpoint
hysteresis values.
Wrong programming of
the
parameters/set
point and/or hysteresis
values.
Your intervention is not
required
In
the
event
that
technical
assistance
been
and/or
the
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