Selco S 45 Instrucciones De Uso página 15

Welding and cutting cables
To minimise the effects of electromagnetic fields follow the fol-
lowing instructions:
- Where possible, collect and secure the earth and power
cables together.
- Never coil the welding cables around your body.
- Do not place your body in between the earth and power
cables (keep both on the same side).
- The cables must be kept as short as possible, positioned as
close as possible to each other and laid at or approximately
at ground level.
- Position the equipment at some distance from the welding
area.
- The cables must be kept away from any other cables.
Earthing connection
The earth connection of all the metal components in the weld-
ing (cutting) equipment and in the close aerea must be taken in
consideration.
The earthing connection must be made according to the local
regulations.
Earthing the workpiece
When the workpiece is not earthed for electrical safety reasons
or due to its size and position, the earthing of the workpiece
may reduce the emissions. It is important to remember that the
earthing of the workpiece should neither increase the risk of
accidents for the user nor damage other electric equipment.
The earthing must be made according to the local regulations.
Shielding
The selective shielding of other cables and equipment present
in the surrounding area may reduce the problems due to elec-
tromagnetic interference. The shielding of the entire welding
(cutting) equipment can be taken in considered for special
applications.
2 INSTALLATION
Installation should be performed only by expert
personnel authorised by the manufacturer.
During installation, ensure that the power source
is disconnected from the mains.
2.1 Commissioning
Before starting work, it is necessary to carry out the following
checks and work:
1. Check that the generator is turned off.
2. Check that all the parts of the torch are working. For the
various parts that make up the torch body, the sequence of
correct assembly is 1-2-3-4-5.
3. To fit the electrode (No.2), use the key, taking care to avoid
excessive tightening that could damage the thread of the
components.
The electrode must be unscrewed only after the post-cutting air
flow is finished, and therefore with the electrode itself cooled.
4. Check that the air diffuser, or "swirl-bush" (No.3) is work-
ing correctly, which must always show access holes free of
obstruction; the use of a defective air diffuser would cause
overheating, with consequent damage to the components of
the torch body.
5. With the spare parts assembled, check that by screwing
the outer nozzle (No. 5) to the torch body the correspond-
ing alarm on the generator is cut off; finally check that by
unscrewing the nozzle the alarm is triggered; these checks
should be carried out with the generator on, taking care not
to press the torch button.
6. The compressed air used must be filtered and maintained at
a high level of purity; humid air, oil and other contaminative
agents must be removed, by making use of suitable driers
and anti- oil filters.
Thus the torch is set up for the cutting operation.
In any case it is necessary to also follow what is shown in the
instruction manual for the generator, above all in the para-
graphs "Warning", "Connection" and "Maintenance".
2.2 Using the torch
Switch on the system, ensuring the LED is working correctly.
If torch components are missing or have been assembled incor-
rectly, or the compressed air pressure is too low, or entirely lack-
ing, LEDs turn on respectively to display the fault. The generator
is shut down until the fault is removed.
"Consult the section "Commissioning" of power source's instruc-
tion manual".
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