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ATTENTION!: Intervention of the safety thermo-
stat can be caused by a fault linked to the control
board or by no water inside the tank.
ATTENTION!: Carrying out repair work on parts
with safety function compromises safe opera-
tion of the equipment. Replace faulty parts with
original spare parts only.
NB!: Intervention of the thermostat excludes operation of
the heating element but not the heat pump system within
the permitted operating limits.
ATTENTION! If the operator is unable to elimi-
nate the fault, switch off the equipment and con-
tact the Technical Assistance Service, communi-
cating the model of the product purchased.
11. MAINTENANCE
ATTENTION!: Any repairs to the equipment must
be carried out by qualified personnel. Improper
repairs can put the user in serious danger. If your
equipment needs any repair, contact the service
center.
ATTENTION!: Before undertaking any mainte-
nance operation make sure the equipment is not
and cannot accidentally be electrically powered.
Therefore, disconnect the power at every main-
tenance or cleaning operation.
11.1
Sacrificial anode check/replacement
The magnesium (Mg) anode, also called "sacrificial" anode, pre-
vents any eddy currents generated inside the boiler from trig-
gering surface corrosion processes.
In fact, magnesium is a weakly charged metal compared to the
material of which the inside of the boiler is coated, therefore it
attracts first the negative charges that form with the heating of
water, consuming itself. The anode therefore "sacrifices" itself
by corroding itself instead of the tank. The boiler has two an-
odes, one fitted in the lower part of the tank and one fitted in the
upper part of the tank (area more subject to corrosion).
The integrity of the Mg anodes must be checked at least every
two years (preferably once a year). The operation must be per-
formed by qualified personnel.
Before doing the check:
• Close the cold water inlet.
• Proceed with emptying the boiler (see par. "11.2 Emptyng
the tank").
• Unscrew the upper anode and check its corrosion; if the cor-
rosion affects more than 2/3 of the anode surface proceed
with replacement.
User, Installations and Maintenance Manual
The anodes have a special sealing gasket, to prevent water
leaks; it is advisable to use anaerobic thread sealant compat-
ible for use in heating-plumbing systems. The gaskets must be
replaced with new ones in case of checking and also anode
replacement.
11.2
Emptyng the tank
If not in use, especially in case of low temperatures, it is advis-
able to drain the water inside the tank.
For the equipment in question, just detach the water inlet con-
nection (see par. "7.5 Hydraulic connections"). Alternatively,
when setting up the system, it is advisable to install a
valve
fitted with a hose connection.
NB!: In case of low temperatures, remember to empty the
system to avoid freezing.
11.3
Tank internal inspection
To inspect the tank internally, follow this procedure:
•
empty the tank (as described in paragraph "11.2 Emptyng
the tank")
•
remove the sacrificial anode (as described in paragraph
"11.1 Sacrificial anode check/replacement")
•
inspect the inside of the tank using an endoscopic camera
evaluating the integrity of the enamelling and metal com-
ponents.
Once the inspection is complete, reinstall the sacrificial anode
and refill the tank as indicated in paragraph "9. Commissioning"
on page 29.
fig. 38
drain ball
Page 35
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Troubleshooting
