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6
Electrical system
6.1
Notes on safety for the electrical wiring
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. Refer to the wiring diagrams.
The manufacturer declines all responsibility for modifications or connections different from those shown in the
DANGER
wiring diagrams.
Do not invert the neutral with the phase in the electrical supply line. Any inversion would cause a lockout due to
firing failure.
Check that the electrical supply of the burner corresponds to that shown on the identification label and in this
manual.
The burners have been set for intermittent operation. 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 the
boiler's thermostat/pressure switch ensures the stopping of the burner.
If this is not the case, it is necessary to apply in series with IN a timer switch that turns off the burner at least once
every twenty-four 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.
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, 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.
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
6.2
Electrical connections
Electrical wiring must be made in accordance with
the regulations currently in force in the country of
destination and by qualified personnel.
Riello S.p.A. declines all liability for modifications
WARNING
or connections other than those shown on these
diagrams.
Use flexible cables according to regulations EN 60 335-1:
–
if in PVC boot, use at least H05 VV-F;
–
if in rubber boot, use at least H05 RR-F.
All the cables to be connected to the burner terminal strip
5)(Fig. 18) must be routed through the fairleads, supplied by the
manufacturer for insertion into the holes in the plate, preferably
those on the left side, after having unscrewed screws 6), split the
plate into its two parts 7) and 8) then removed the thin diaphragm
effectively closing the aperture.
The fair leads and precut holes can be used in various ways.
One example is given below (Fig. 18):
RL 28/M
1
Pg 11 Single phase power supply
3
Pg 9
Control device TL
4
Pg 9
Control device TR or probe (RWF40)
20033316
Electrical system
DANGER
If the cover is still present, remove it and proceed with the electri-
cal wiring according to the wiring diagrams.
RL 38-50/M
1
Pg 11
Three phase power supply
2
Pg 11
Single phase power supply
3
Pg 9
Control device TL
4
Pg 9
Control device TR or probe (RWF40)
20
GB
isolate the fuel supply.
D864
Fig. 18
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