Snap-On PLASMA50 Manual De Instrucciones página 6

stop cutting at once. Do not use the machine until the
problem is identified and solved.
• Always fit an automatic wall switch with
power, if possible close to the machine so as to imme-
diately switch the unit off in an emergency event.
• Check often mains cable, torch cable, earth cable and
torch.
Never use the unit when
Replace them immediately.
• Disconnect mains cable from mains before replacing
cables or before removing unit covers.
• Always switch the unit off or disconnect it before
replacing nozzle, swirl ring, electrode or nozzle holder.
• Do not use the unit without protecting covers.
• Always replace any damaged parts of the unit, torch
and cables with original material.
• Never remove torch or unit safety devices.
• Make sure that the supply mains line is equipped with
an efficient earth plug.
• Any maintenance should be only carried out by
qualified personnel aware of the risks due to danger-
ous voltages necessary to make the unit work.
ATTENTION: Never screw nozzle holder D (see pic-
ture 7) to torch body E without fitting consumables
electrode A, diffuser B, nozzle C.
The absence of such parts jeopardizes the machine
working and particulary the operator's safety.
RADIATIONS
Ultraviolet radiations
damage your eyes and burn your skin. Then:
• Wear proper clothing and helmets.
• Do not use contact lenses!! The intense heat coming
from the arc may stick them on the cornea.
• Use masks with grade DIN 7 or 8 safety lenses, at least.
• Protect people surrounding the cutting area.
FUMES
Cutting operations give off fumes and harmful
metal dusts which may damage health, therefore:
• Do not work in areas without proper ventilation.
• Keep your head out of fumes.
• In closed rooms use suitable exhaust fans, placed
under the cutting area, if possible.
• If ventilation is not enough,
approved for this procedure.
• Clean the material to be cut of any solvents or halogen
degreasers giving rise to toxic gases when cutting: Some
chlorine solvents may decompose with radiation emitted
by the arc and create phosgene gas.
• Do not cut plated metals or metals containing lead,
graphite, cadmium, zinc, chrome, quicksilver or beryllium
unless you have a proper breathing set.
• The electric arc creates ozone. After long exposure to
high concentrations of ozone you may have headache,
nose, throat and eyes irritation as well as serious conges-
tion and chest pains.
IMPORTANT: DO NOT USE OXYGEN FOR VENTILATION.
FIRE
• Avoid causing fire because of sparks, hot
metal or pieces.
6
adequate
one of them is damaged.
created by the arc may
use breathing sets
• Make sure that suitable fireproof devices are available
close to cutting area.
• Remove from cutting area and surrounding area (33
feet at least) all inflammable and combustible material.
• Do not cut containers of combustible or lubricating
material, even when empty. These should be carefully
cleaned before being cut.
• Let the material cut cool down before touching it or
putting it in contact with combustible or flammable mate-
rial.
• Do not cut parts with hollow spaces including flam-
mable material.
• Do not work under conditions of high concentra-
tion of combustible vapours, gases or flammable dust.
• Always check the work area half an hour after cutting so
as to make sure that no fire is starting to burn.
BURNS
• Wear fire-proof clothes all over your body to protect
your skin against burns caused by ultraviolet radiations
from the arc, from sparks and hot metal.
• Wear no turn-up trousers to prevent sparks and metal
to deposit in them.
• Wait for the torch to be cooled down and then switch
the unit off before touching the front side of the torch.
• Torch is provided with a pilot arc, then as soon as
you press the button, the plasma spark starts even if
earth cable is not connected. Avoid directing jet
towards your own body or towards other people sur-
rounding the cutting area.
• To prevent spark to start by chance, always switch
the unit off before putting down your torch.
• Do not carry combustible material, such as lighters or
matches in pocket.
EXPLOSIONS
• Do not cut above or near containers under pres-
sure.
• Do not cut in environments containing explosive dusts,
gases or vapors.
This plasma cutter uses compressed air to
should you use compressed air bottles follow suitable
precautions:
A) CYLINDERS
• Do not directly connect cylinders to reducing unit
without a pressure regulator; pressure might exceed
the reducing unit capacity making it explode.
• Feeding pressure must not exceed 120 PSI (8bar/0.8
MPa)
• Handle or use pressure cylinders in conformity with the
existing rules.
• Do not use leaking or damaged cylinders.
• Do not use cylinders which are not properly secured.
• Do not carry cylinders whose content is not clearly iden-
tified.
• Never lubricate cylinder valves with oil or grease.
• Do put cylinder in electrical contact with plasma arc.
• Do not expose cylinders to excessive heat, sparks, hot
metal or flames.
• Do not tamper with cylinder valves.
• Do not try to loosen tight valves by means of hammers,
keys or something else.
work;