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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.
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 firing
failure.
The RS 64/E MZ burner has been approved for internal use. This means that it 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 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 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 a multiple pole switch with at least a 3 mm gap between the contacts (overvoltage category III), as foreseen 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.
If the hood is still present, remove it and proceed with the electri-
cal wiring according to the layouts shown in Appendix A.
Use flexible cables according to standard EN 60 335-1.
All cables to be connected to the plugs 6) of the burner are
passed through supplied cable grommets that must be inserted
into the holes of the left-hand and right-hand plate, after having
unscrewed screws 7), opened the plate in part 8) and 9) and
removed the thin diaphragm that blocks the holes. See Fig. 21.
The use of the cable grommets and the pre-blanked holes can be
done in different manners; by way of example we indicate the fol-
lowing mode:
1 - Pg 11
Three-phase power supply
2 - Pg 11
Gas valves
3 - Pg 9
Thermostat/Pressure switch TL
4 - Pg 9
Thermostat/Pressure switch TR
5 - Pg 11
Gas pressure switch for valve leak detection
NOTE
Modulating operation
If connecting the output Power Regulator Kit RWF40, the TR
thermostat/pressure switch and the TL thermostat/pressure
switch must be removed.
20022445
declines all responsibility for modifications or connections different from those shown in the electrical layouts.
7
8
9
4
3
2
1
18
GB
D8099
6
Fig. 21
5
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