Recommendations - Polysoude MU IV Series User Manual

MU IV
1. 3.

Recommendations

Risk of electric shocks
Live parts include the electrode, the weld circuit,
the supply circuit and the internal circuits, the
filler wire and metal parts in contact with it, the
wire feeder unit and the wire feeding mechanism.
Any contact with these parts can cause an electric
shock if the installation is connected to the mains
supply.
Circumstances increasing the risk of electric
shocks: humid environments, working on conduct-
ing surfaces, poor earth connections, system in
poor condition, unsafe working conditions.
To prevent risks:
• Avoid any contact with live wire
spools.
• Inspect water-cooled torches regularly
to detect leakage. Pay attention to
condensation.
• Never wind the cables around your
body.
• Make sure that the electrode is not live
when changing it.
• Before any maintenance, repair or
pause, disconnect the equipment from
the mains supply.
• Wear gloves, clothes, aprons and
safety shoes that are dry and without
holes.
• Carpets or other insulating materials
must be used if the welder has to work
on metal surfaces or structures.
• The equipment must be installed and
earthed as specified in the operating
manual.
• The current return cable must be fixed
correctly (clean surface, solid clamping
as close as possible to the weld area).
• Cables that are damaged, worn,
unsheathed, the wrong size or poorly
assembled must not be used and must
be replaced immediately.
• The power supply must be properly
earthed.
• Use a separate cable if the workpiece
must be earthed.
• Appropriate connectors must be used.
Pay attention to the off-load voltage that is
limited to 80 V efficient AC or 113 V DC (nec-
essary for the arc ignition). Maximum value
for plasma cutting power supplies: 500 V.
6-80
During welding, fumes and gases are released
which are harmful to your health. Avoid inhaling
fumes.
Sources of fume and gas emissions: basic materi-
al, filler metal, coating (flux) by covered electrode,
shielding gas, solvents and materials covering the
workpiece.
To prevent risks:
The radiation from the arc can cause eye and skin
burns.
Risk identification: exposure to intense visible and
invisible radiation from the arc (ultraviolet and
infrared). Radiation is reflected by welding metals
such as aluminium or stainless steel. Flash burns,
sparks, stings caused by the tungsten electrode
tip.
To prevent risks:
Wear a scarf around your neck and close the collar
of your garment.
PN-0706056 Ind. 8
Risk of fume or gas inhala-
tion
• Use breathing apparatus, such as filter
masks, ventilated masks, air-supply
masks, disposable masks.
• Avoid chlorinated solvents.
• Dry the workpieces thoroughly before
welding.
• Do not work alone!
• Trap fumes and gases at the source.
• Remove paint, oil and any other coat-
ings from the surface.
Risk of eye or skin burns
caused by radiation
• Wear gloves or leather gauntlets to
protect hands and forearms.
• Wear an apron or gaiters to protect
the legs, knees and feet.
• Wear a mask (strapped to the head,
hand-held or electronic) or goggles fit-
ted with a suitable filter
• Use protective curtains to protect staff
working nearby.
THE ART OF WELDING