7
Electrical system
Notes on safety for the electrical wiring
The electrical wiring must be carried out with the electrical supply disconnected.
Electrical wiring must be made in accordance with the regulations currently in force in the country of destination
and by qualified personnel. Refer to the wiring diagrams.
grams.
Do not invert the neutral with the phase wire in the electricity supply line. Any inversion would cause a lockout
due to firing failure.
The electrical safety of the device is obtained only when it is correctly connected to an efficient earthing system,
made according to current standards. It is necessary to check this fundamental safety requirement. In the event
of doubt, have the electrical system checked by qualified personnel.
DANGER
The electrical system must be suitable for the maximum input power of the device,as indicated on the label and
in the manual, checking in particular that the section of the cables is suitable for the input power of the appliance.
For the main power supply of the device from the electricity mains:
- do not use adapters, multiple sockets or extensions;
- use a multiple pole switch with at least a 3 mm gap between the contacts (overvoltage category), as foreseen
by the present safety standards.
Do not touch the device with wet or damp body parts and/or in bare feet.
Do not pull the electric cables.
7.1
Control box
To remove the control box from the burner it is necessary to:
disconnect all the connectors connected to it, the 7-pin plug,
the high voltage cables, and the earth wire (TB);
loosen the screw A) (Fig. 15) and pull the control box in the
direction of the arrow.
To install the control box it is necessary to:
tighten the screw A) with a tightening torque of 1 - 1.2 Nm;
connect all the connectors that were previously discon-
nected.
This operation must be performed with the
burner turned off and mains power discon-
nected.
WARNING
NOTE:
The burners have been approved for intermittent operation.
This means that they must stop once every twenty four hours to
permit the electrical control box to check its efficiency at start up.
Normally the boiler's limit thermostat (TL) ensures the stopping of
the burner.
If this is not the case, it is necessary to apply in series with (TL)
a timer switch that turns off the burner at least once every twenty-
four hours.
20015403
Electrical system
declines all responsibility for modifications or connections different from those shown in the wiring dia-
16
GB
A
E9275
Fig. 15