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5.9
Electrical wiring
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 wir-
DANGER
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 use.
This means they should compulsorily be stopped at least once every 24 hours to enable the control box to per-
form checks of its own start-up efficiency. Normally, burner stopping is guaranteed by the boiler's thermostat/pres-
sure 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 oper-
ations:
Disconnect the electrical supply from the burner
by means of 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 electri-
cal wiring according to the wiring diagrams. Use flexible cables in
compliance with the EN 60 335-1 standard.
5.9.1
Supply cables and external connections
passage
All the cables to be connected to the burner must be threaded
through cable grommets.
The use of the cable grommets can take various forms by way of
example we indicate the following mode:
1
7 pole socket for single-phase power supply, thermostat/
pressure switch TL
2
4 pole socket for thermostat/pressure switch TR
3
6 pole socket for pilot and main gas train supply
Cable length
Power supply line from the mains
Load controller X5-03
Safety loop
Remote reset (lay separated cable)
Other lines
Installation
Max. 100 m (100 pF/m)
Max. 30 m (100 pF/m)
Max. 30 m (100 pF/m)
Max. 30 m (100 pF/m)
Max. 30 m (100 pF/m)
Tab. O
27
After carrying out maintenance, cleaning or
checking operations, reassemble the hood and all
the safety and protection devices of the burner.
3
1
2
Modulating operation
In case of connection of the RWF50.2 output pow-
er regulator kit, disconnect the external 3-point
signal TR thermostat/pressure switch from the
WARNING
4-pin plug and the TL thermostat/pressure switch
from the 7-pin plug.
GB
20160383
Fig. 24
20160576
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