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4.15 Electrical wiring
4.15.1 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.
DANGER
The manufacturer declines all responsibility for modifications or connections different from those shown in the wir-
ing diagrams.
Check that the electrical supply of the burner corresponds to that shown on the identification label and in this manual.
The burner has been type-approved for intermittent operation (FS1). This means that it should as a rule be
stopped at least once every 24 hours to enable the control box to perform checks of its own start-up efficiency.
Normally, burner stopping is guaranteed by the boiler's thermostat/pressure switch.
If this is not the case, a time switch should be fitted in series to TL to stop the burner at least once every 24 hours.
Refer to the wiring diagrams.
The burner is factory set for FS1 operation (1 stop every 24 hours); it can be converted to FS2 operation (continu-
ous - 1 stop every 72 hours), by changing the parameters using the menu of the AZL Display.
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. Do not use the gas tubes as an earthing system
for electrical devices.
The electrical system must be suitable for the maximum power absorption of the device, as indicated on the label
and in the manual, checking in particular that the section of the cables is suitable for that level of power absorption.
For the main power supply of the device from the electricity mains:
- do not use adapters, multiple sockets or extensions;
- make provisions for an omnipolar switch with a gap between the contacts of at least 3 mm (over-voltage cate-
gory III), as required by current safety regulations.
Do not touch the device with wet or damp body parts and/or in bare feet.
Do not pull the electric cables.
4.15.2 Notes on terminals
On the electrical panel there terminals with a "spring" system. The
opening of these terminals must be made via a suitable tool, using
a flat-blade screwdriver of the correct size.
The clamp uses a pressurised opening system.
Clamp opening
insert the correct screwdriver into the opening, pushing down
until the hole for the cable is completely open.
Insert the previously stripped cable and remove the screw-
driver. Make sure the cable is securely fastened Fig. 29.
Installation
20114253
Fig. 29
31
Before carrying out any maintenance, cleaning or checking opera-
tions:
Turn off the burner's electrical supply using the
main system switch.
DANGER
Turn off the fuel interception tap.
DANGER
Avoid condensate, ice and water leaks from form-
ing.
DANGER
If the cover is still present, remove it and proceed with the electrical
wiring according to the wiring diagrams.
The use of the cable grommets can take various forms. By way of
example we indicate the following mode (according to UL795).
GB
20142253
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