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Installation
4
4.8
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 carried out by qualified personnel and in compliance with the regulations currently in force in
the country of destination. Refer to the electrical layouts given in Appendix A.
declines all responsibility for modifications or connections different from those shown in the electrical lay-
outs.
Check that the electrical supply of the burner corresponds to that shown on the identification label and in this manual.
See Fig. 8.
Do not invert the neutral with the phase in the electrical supply line.Any inversion would cause a lockout due to igni-
tion failure.
RS50/M MZ burners have been approved 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, 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 IN to provide for burner shutdown at least once every
24 hours. Refer to the electrical layouts given in Appendix A.
DANGER
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 appliances.
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 appliance.
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 3 mm 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.
If the hood is still present, remove it and proceed with the
electrical wiring according to the layouts shown in Appen-
dix A.
Use flexible cables in compliance with the EN 60 335-1
standard.
All cables to be connected to the plugs 7 (Fig. 20) of
the burner are passed through supplied cable grom-
mets that must be inserted into the holes of the left-
hand and right-hand plate, after having unscrewed
screws 8), opened the plate in part 9) and 10) and
removed the thin diaphragm that blocks the holes.
The fairleads and hole press-outs can be in various
ways; by way of example we indicate the following
mode:
1-Pg 11 Three-phase power supply
2-Pg 11 Single-phase power supply
3-Pg 9
Remote control TL
4-Pg 9
Remote control TR or probe (RWF)
5-Pg 11 Gas valves (when RG1/CT or LDU 11 leak
detection control device is not fitted)
6-Pg 11 Gas pressure switch or valve leak detection
control device
6463
7
4
3
2
D8710
1
16
GB
5
6
8
9
10
Fig. 20
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