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1.9 ELECTRICAL CONNECTION
The appliance has an IPX5D protection degree; electrical safety of
the appliance is achieved only when it is connected properly to an
efficient earthing system, as specified by current safety standards.
The manufacturer declines any responsibility for dama-
ge or physical injury caused by failure to connect the
boiler to an efficient earthing system or failure to comply
with the IEC reference standards.
Open the control panel connections compartment
To carry out electrical connections, all you have to do is open the
connections compartment as follows.
Remove the casing:
1. Loosen the screw (a) at the bottom.
2. Move the control panel to the right by making it slide on the
slots (b);
3. Remove the control panel from the frame;
4. Place the control panel horizontally;
5. Insert the control panel feet into the special slots on the frame
(c);
6. Move the control panel to the left in order to fit it into the fra-
me;
7. Remove the screw (d) securing the control panel cover (e);
8. Press the two hooks (g) on the cover (e);
9. Remove the cover (e) from the control panel (h);
At this point, it is possible to access the terminal board (f).
Also ensure that the electrical installation corresponds to maxi-
mum absorbed power specifications as shown on the boiler data
nameplate.
The boilers are supplied complete with a “Y” type H 05 VVF
3 x 0.75 mm2 power supply cable, without plug.
The power supply cable must be con-
nected to a 230V ±10% / 50Hz mains sup-
ply 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.
No appliance pipes must ever be used to earth the
electric system or telephone lines.
To protect from possible dispersions of
DC voltage, it is necessary to provide a
type A differential safety device.
If the power cable is damaged, contact a
qualified company (e.g. the Authorised
Technical Assistance Centre) for its re-
placement to avoid a hazard.
The power cable must follow the prescribed route (Par. 1.6);
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.
For the main power supply to the appliance, never use adapters,
multiple sockets or extension leads.
Installation with system operating at direct low temperature
The boiler can directly supply a low temperature system by modi-
fying the parameters "P11" and "P12" (Parag. 3.9); in this situation
it is good practice to insert a relevant safety kit (optional) made up
of a thermostat (with adjustable temperature).
The thermostat must be positioned on the system flow pipe.
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