17
INS
TALLER
U
SER
M
AINTEN
AN
CE
TECHNI
CI
AN
TECHNI
CAL
D
AT
A
The manufacturer declines any responsibility for damage or physical injury caused by failure to connect the boiler to an effi-
cient earthing system or failure to comply with the IEC reference standards.
Open the control panel connections compartment (Fig. 5).
The power supply cable must be connected to a 230V ±10% / 50Hz mains supply respecting L-N
polarity and earth connection; this network must also have a multi-pole circuit breaker with
class III overvoltage category in compliance with installation regulations.
To carry out electrical connections, all you have to do is open the connections compartment as follows.
1. Remove the front panel (Fig. 64 - 65)
2. Loosen the screws (a).
3. Remove the cover (b) from the control panel (c).
a
a
b
c
1
1
1
2
a
5
At this point, you can access the terminal board.
Also ensure that the electrical installation corresponds to maximum absorbed power specifications as shown on the boiler data name-
plate.
The boilers are supplied complete with a “Y” type H 05 VVF 3 x 0.75 mm
2
power supply cable, without plug.
To protect from possible dispersions of DC voltage, it is necessary to provide a type A differen-
tial safety device.
If the power cable is damaged, contact a qualified company (e.g. the Authorised Technical As-
sistance Centre) for its replacement to avoid a hazard.
The power cable must be laid as shown (Fig. 6);
If the network fuse on the P.C.B. needs replacing, this must also be done by qualified personnel: use a 5x20 250V 3.15 A fast fuse.