DWT MMA-180 I, Original Instructions Manual

Page: 21 / 176

21
English
General
safety recommendations
Safety instructions
These instructions contain important information which
either supplements or supersedes other instruction
relating to this product� Read these instructions
carefully before commencing operation�
Furthermore, the installation and use of the device
must follow the instructions given in the international
standard: IEC 60974-9 Arc welding equipment Part 9�
Installation and use
Use of personal protective equipment:
• The arc and its reflecting radiation damage unpro -
tected eyes� Shield your eyes and face appropriately
before you start welding or observe welding� Also
note the different requirements for the darkness of the
screen in the mask as the welding current changes�
• The arc radiation and spatters burn unprotected
skin� Always wear protective gloves, clothing and
footwear when welding�
• Always wear hearing protection if the ambient noise
level exceeds the allowable limit�
General operating safety
• Exercise caution when handling parts heated in
welding� For example, the tip of the welding torch, the
end of the welding rod and the work piece will heat to
a burning temperature�
• Never carry the device or suspend it by the carrying
strap during welding�
• Do not expose the machine to high temperatures, as
this may cause damage to the machine�
• Keep the torch cable and earthling cable as close
to each other as possible throughout their length�
Straighten any loops in the cables� This minimizes
your exposure to harmful magnetic fields, which may
interfere with a pacemaker, for example�
• Do not wrap the cables around the body�
• In environments classified as dangerous, only use
S-marked welding devices with a safe idle voltage level�
These work environments include, for example, humid,
hot or small spaces where the user may be directly
exposed to the surrounding conductive materials�
• Do not use arc welding equipment for pipe thawing�
Spatter and fire safety
• Welding is always classified as hot work, so pay
attention to fire safety regulations during welding and
after it�
• Remember that fire can break out from sparks even
several hours after the welding work is completed�
• Protect the environment from welding spatter�
Remove flammable materials, such as flammable
fluids, from the welding vicinity and supply the welding
site with adequate firefighting equipment.
• In special welding jobs, be prepared for hazards
such as fire or explosion when welding container-type
work pieces�
• Never direct the spark spray or cutting spray of a
grinder toward the welding machine or flammable
materials�
• Beware of hot objects or spatter falling on the
machine when working above the machine�
• Welding in flammable or explosive sites is absolutely
forbidden�
General electric safety
• Only connect the welding machine to an earthed
electric network�
• Note the recommended mains fuse size�
• Do not take the welding machine inside a container,
vehicle or similar work piece�
• Do not place the welding machine on a wet surface
and do not work on a wet surface�
• Do not allow the mains cable to be directly exposed
to water�
• Ensure cables or welding torches are not squashed
by heavy objects and that they are not exposed to
sharp edges or a hot work piece�
• Make sure that faulty and damaged welding torches
are changed immediately as they can be lethal and
may cause electrocution or fire.
• Remember that the cable, plugs and other electric
devices may be installed or replaced only by an
electrical contractor or engineer authorized to perform
such operations�
• Turn off the welding machine when it is not in use�
• In the case of abnormal behavior of the equipment,
such as smoke coming from the machine during normal
use, take the machine to a DWT service representative
for inspection�
Welding power circuit
• Insulate yourself from the welding circuit by using
dry and undamaged protective clothing�
• Never touch the work piece and welding rod, welding
wire, welding electrode or contact tip at the same time�
• Do not put the welding torch or ground cable on the
welding machine or other electric equipment�
• Turn off the machine from the main switch always
before you need to touch any components of the electric
circuit, for example when replacing the electrode or
contact tip or moving the earth return clamp�
Welding fumes
• Ensure proper ventilation and avoid inhaling the
fumes�
• Ensure sufficient supply of fresh air, particularly in
closed spaces� You can also ensure the supply of clean
and sufficient breathing air by using a fresh-air mask.
• Take extra precautions when working on metals or
surface-treated materials containing lead, cadmium,
zinc, mercury or beryllium�
Transportation, lifting and suspension
• Pay attention to correct working position when lifting
a heavy device risk of injury to the back�
• Never pull or lift the machine by the welding torch
or other cables� Always use the lift points or handles
designed for that purpose�
• Only use a transport unit designed for the equipment�
• Try to transport the machine in an upright position,
if possible�
• Never lift a gas cylinder and the welding machine at
the same time� There are separate provisions later for
gas cylinder transportation�
• Never use a welding machine when suspended
unless the suspension device has been designed and
approved for that particular purpose�