20102152
24
GB
Installation
4.13 Electrical wiring
Notes on safety for the electrical wiring
Before carrying out any maintenance, cleaning or checking opera-
tions:
If the hood is still present, remove it and proceed with the electrical
wiring according to the wiring diagrams.
4.13.1 Supply cables and external connections
passage
All the cables to be connected to the burner are fed through the
grommets. See Fig. 24.
The use of the cable grommets can take various forms. By way of
example we indicate the following mode (according to
UL795
):
A
Variable speed sensor
B
Maximum gas pressure switch
C
UV sensor
D
Air servomotor
E
Gas servomotor
F
Air pressure switch
1
Three phase power supply with
3
/
4
inch cable grommet.
2
Available: single phase power supply and other devices with
1
/
2
inch cable grommet.
3
Available: consents/safety, minimum gas pressure switch, gas
valves and other devices with
3
/
8
inch cable grommet.
4
Available hole for M16
5
Available for ground terminals
6
Available for inverter three phase power supply with
3
/
4
inch
cable grommet
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.
The Manufacturer declines all responsibility for modifications or connections different from those shown in the electri-
cal layouts.
Check that the electrical supply of the burner corresponds to that shown on the identification label and in this manual.
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. Do not use the gas tubes as an earthing system for elec-
trical devices.
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
1
/
8
” (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.
DANGER
Disconnect the electrical supply from the burner by
means of the main system switch.
DANGER
Close the fuel interception tap.
DANGER
Avoid condensate, ice and water leaks from form-
ing.
WARNING
The control panel is in compliance with UL508A.
After carrying out maintenance, cleaning or check-
ing operations, reassemble the hood and all the
safety and protection devices of the burner.
5
3
C
3
B
3
5
1
5
F
4
3
5
3
4
4
E
D
4
5
2
6
A
Fig. 24
20104074
