15
20013962
GB
Electrical system
7.1
Control box
To remove the control box from the burner it is necessary to:
disconnect all the connectors, the 7-pin plug, the high vol-
tage cables and the earth wire (
TB
);
unscrew the bolt
A
) (Fig. 13) and pull the control box in the
direction of the arrow.
To install the control box it is necessary to:
screw the bolt
A
) in at a torque of 1 - 1.2 Nm;
reconnect all the connectors previously disconnected.
NOTE:
The burners have been type-approved for intermittent opera-
tion.
This means they must stop at least once every 24 hours in or-
der to allow the electrical control box to check its efficiency on
start-up.
The boiler limit thermostat (
TL
) normally ensures the burner
halts.
If this does not happen a time switch halting the burner at least
once every 24 hours must be applied in series to (
TL
).
7
Electrical system
Notes on safety for the electrical wiring
DANGER
The electrical wiring must be carried out with the electrical supply disconnected.
Electrical wiring must be carried out by qualified personnel and in compliance with the regulations currently in
force in the country of destination. Refer to the wiring diagrams.
declines all responsibility for modifications or connections different from those shown in the electrical
layouts.
Do not invert the neutral with the phase in the electrical 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.
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 device.
For the main power supply of the device from the electricity mains:
- do not use adapters, multiple sockets or extensions;
- use an omnipolar switch with an opening of at least 3 mm (overvoltage category) between the contacts, as
indicated by the current safety standards.
Do not touch the device with wet or damp body parts and/or in bare feet.
Do not pull the electric cables.
WARNING
This operation must be performed with the
burner turned off and mains power discon-
nected.
Fig. 13
E9275
A
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