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4.14
Electrical connections
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.
The manufacturer declines all responsibility for modifications or connections different from those shown in the
DANGER
wiring diagrams.
Check that the electrical supply of the burner corresponds to that shown on the identification label and in this
manual.
The burner is set up for continuous operation.
This means they should compulsorily be stopped at least once every 72 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 72 hours. Refer to the wiring diagrams.
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
category 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.
Before carrying out any maintenance, cleaning or checking
operations:
Disconnect the electrical supply from the burner
by means of the system main switch.
DANGER
Close the fuel shut-off valve.
DANGER
Avoid condensate, ice and water leaks from
forming.
DANGER
If the cover is still present, remove it and proceed with the
electrical wiring according to the wiring diagrams.
Use flexible cables according to EN 60 335-1 standard.
Before making any connections, consult the
electrical system in the appendix to this instruction
book.
DANGER
Key (Fig. 27)
1
Ignition transformer
2
Terminal board
3
AZL display
4
Plugs for external inputs
5
LMV electronic cam
6
Electronic cam transformer
7
POWER ON signal button
8
GAS/OFF/OIL burner selector
9
FAN MOTOR ON signal light
10 PUMP MOTOR ON signal light
11 BURNER ON GAS signal light
12 BURNER ON OIL signal light
13 LANCE OIL POSITION READY signal light
14 LOCKOUT RESET button
15 Stop button
16 Clear contacts relay
17 Auxiliary fuse
18 Filter
19 220/24V feeder
Installation
4.14.1 Supply cables and external connections
passage
All the cables to be connected to the burner need to pass through
cable grommets, either by making holes on the electric box or
else using the holes with a plug, as shown in Fig. 27.
12
4
11
7
14
After carrying out maintenance, cleaning or
checking operations, reassemble the cover and
all the safety and protection devices of the burner.
25
GB
20165218
3
13
10
8
9
15
6
1
18
2
17
19
5
18
Fig. 27
20169350
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