hajdu Z30 SMART Instructions De Montage Et D'utilisation page 37

After removing the service cover, it is recommended to perform reassembling
using a new sealing. When cleaning, avoid damaging the protective surface finish.
Perform mechanical cleaning only; no other cleaning or disinfection is needed.
Descaling is considered to be part of the maintenance, and it does not belong to
the activities covered by guarantee. However, due to the necessity of
disconnecting the circuit, putting back into operation must be performed by an
authorised service station (along with the review of the electrical connections).
9.4 Regulator, limiter
The replacement requires the disconnection of the power supply; such replace-
ment requires the disconnection of the electrical circuit. The regulator and the
limiter form a single unit.
9.5 Heating element
Its replacement requires the disconnection of the power supply; such replace-
ment requires the disconnection of the electrical circuit.
The replacement of the ceramic heating element (radiator with pocket tube)
requires the discharge of water from the container and the removal of the
service cover. For this design, the radiator is inserted in an enamelled steel
pocket tube protected from outside impacts, whereby the heating element has
not direct contact with water. Due to this design, failure due to scaling rarely
occurs, the anode has a longer expected service life than in conventional pipe
radiator designs.
We absolutely recommend this design for regions where water is hard.
9.6 Active anode
The hot water storage tank is additionally protected against corrosion by active
anodes. The service life of the active anodes is subject to the water quality and
the operating conditions. The condition of the anodes must be checked upon
each descaling operation, but at least once every two years.
Its replacement requires the disconnection of the power supply; such
replacement requires the disconnection of the electrical circuit and the removal
of the service cover. After removing the service cover, it is recommended to
perform reassembling using a new sealing. The technician determines the time
of the next inspection. If the diameter of the anode decreases by 10 mm
anywhere, it must be replaced. After replacement of the anode, its earthing
must be implemented according to the original state. Adequate metal-through
connection between the active anode and the earthing bolt is essential.
EN
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