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4.10
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 has been type-approved for intermittent use. This means they should compulsorily 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 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;
- use a multiple pole switch with at least a 3 mm gap between the contacts (overvoltage category III), as
envisaged 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.
Before carrying out any maintenance, cleaning or checking
operations:
Disconnect the electrical supply from the burner
by means of the main system switch.
DANGER
Close the fuel shut-off valve.
DANGER
Avoid condensate, ice and water leaks from
forming.
DANGER
Use flexible cables according to EN 60 335-1 Regulations:
• if in PVC sheath, use at least H05 VV-F
• if in rubber sheath, use at least H05 RR-F.
All cables to be connected to the burner must be passed through
the cable grommets.
The use of the cable grommets and the pre-blanked holes can be
done in different manners; for example:
RS 45 BLU single-phase
1
7-pole socket for single-phase power supply, thermostat/
pressure switch TL
2
6-pole socket for gas valves, gas pressure switch or de-
vice for checking the valve seal
3
4-pole socket for thermostat/pressure switch TR
4
Fittings for pipe unions
All the cables to be connected to the plugs 1), 2), 3)(Fig. 25) of
the burner are passed through cable grommets to be inserted in
the holes of the plate, left or right, after having unscrewed the
screws 6), opened the plate at parts 7) and 5) and removed the
thin diaphragm that closes the holes.
20191684
Installation
6
7
5
4
2
After carrying out maintenance, cleaning or
checking operations, reassemble the cover and
all the safety and protection devices of the burner.
22
GB
20191743
3
1
4
Fig. 25
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