Telwin MAXIMA 270 Manuel D'instructions page 5

INSTRUCTION MANUAL
WARNING:
BEFORE USING THE WELDING MACHINE READ THE INSTRUCTION
MANUAL CAREFULLY.
CONTINUOUS WIRE WELDING MACHINE FOR MIG-MAG ARC AND FLUX,
TIG, MMA WELDING FOR PROFESSIONAL AND INDUSTRIAL USE.
NB: The following text uses the term "Welding machine" and "Multiprocess
Welding Machine" for models prepared for MIG-MAG AND FLUX, TIG,
MMA welding.
1. GENERAL SAFETY CONSIDERATIONS FOR ARC WELDING
The operator should be properly trained to use the welding machine
safely and should be informed about the risks related to arc welding
procedures, the associated protection measures and emergency
procedures.
(Please refer to the applicable standard "EN 60974-9: Arc welding
equipment. Part 9: Installation and Use).
- Avoid direct contact with the welding circuit: the no-load voltage
supplied by the welding machine can be dangerous under certain
circumstances.
- When the welding cables are being connected or checks and
repairs are carried out the welding machine should be switched off
and disconnected from the power supply outlet.
- Switch off the welding machine and disconnect it from the power
supply outlet before replacing consumable torch parts.
- Make the electrical connections and installation according to the
safety rules and legislation in force.
- The welding machine should be connected only and exclusively to
a power source with the neutral lead connected to earth.
- Make sure that the power supply plug is correctly connected to the
earth protection outlet.
- Do not use the welding machine in damp or wet places and do not
weld in the rain.
- Do not use cables with worn insulation or loose connections.
- Do not weld on containers or piping that contains or has contained
flammable liquid or gaseous products.
- Do not operate on materials cleaned with chlorinated solvents or
near such substances.
- Do not weld on containers under pressure.
- Remove all flammable materials (e.g. wood, paper, rags etc.) from
the working area.
- Provide adequate ventilation or facilities for the removal of
welding fumes near the arc; a systematic approach is needed in
evaluating the exposure limits for the welding fumes, which will
depend on their composition, concentration and the length of
exposure itself.
- Keep the gas bottle (if used) away from heat sources, including
direct sunlight.
- Use electric insulation that is suitable for the torch, the workpiece
and any metal parts that may be placed on the ground and nearby
(accessible).
This can normally be done by wearing gloves, footwear, head
protection and clothing that are suitable for the purpose and by
using insulating boards or mats.
- Always protect your eyes with the relative filters, which must
comply with UNI EN 169 or UNI EN 379, mounted on masks or use
helmets that comply with UNI EN 175.
Use the relative fire-resistant clothing (compliant with UNI EN
11611) and welding gloves (compliant with UNI EN 12477) without
exposing the skin to the ultraviolet and infrared rays produced by
the arc; the protection must extend to other people who are near
the arc by way of screens or non-reflective sheets.
- Noise: If the daily personal noise exposure (LEPd) is equal to or higher
(EN)
than 85 dB(A) because of particularly intensive welding operations,
suitable personal protective means must be used (Tab. 1).
- The flow of the welding current generates electromagnetic fields
(EMF) around the welding circuit.
Electromagnetic fields can interfere with certain medical equipment
(e.g. Pace-makers, respiratory equipment, metallic prostheses etc.).
Adequate protective measures must be adopted for persons
with these types of medical apparatus. For example, they must
be forbidden access to the area in which welding machines are in
operation.
This welding machine conforms to technical product standards for
exclusive use in an industrial environment for professional purposes.
It does not assure compliance with the basic limits relative to human
exposure to electromagnetic fields in the domestic environment.
The operator must adopt the following procedures in order to reduce
exposure to electromagnetic fields:
- Fasten the two welding cables as close together as possible.
- Keep head and trunk as far away as possible from the welding
circuit.
- Never wind welding cables around the body.
- Avoid welding with the body within the welding circuit. Keep both
cables on the same side of the body.
- Connect the welding current return cable to the piece being
welded, as close as possible to the welding joint.
- Do not weld while close to, sitting on or leaning against the
welding machine (keep at least 50 cm away from it).
- Do not leave objects in ferromagnetic material in proximity of the
welding circuit.
- Minimum distance d= 20 cm (Fig. G).
- Class A equipment:
This welding machine conforms to technical product standards
for exclusive use in an industrial environment and for professional
purposes. It does not assure compliance with electromagnetic
compatibility in domestic dwellings and in premises directly
connected to a low-voltage power supply system feeding buildings
for domestic use.
EXTRA PRECAUTIONS
- WELDING OPERATIONS:
- In environments with increased riskof electric shock;
- In confined spaces;
- In the presence of flammable or explosive materials;
MUST BE evaluated in advance by an "Expert supervisor" and
must always be carried out in the presence of other people
trained to intervene in emergencies.
All protective technical measures MUST be taken as provided
in 7.10; A.8; A.10 of the applicable standard EN 60974-9: Arc
welding equipment. Part 9: Installation and Use".
- Welding MUST NOT be allowed if the welding machine or wire
feeder is supported by the operator (e.g. using belts).
- The operator MUST NOT BE ALLOWED to weld in raised positions
unless safety platforms are used.
- VOLTAGE BETWEEN ELECTRODE HOLDERS OR TORCHES: working
with more than one welding machine on a single piece or on
pieces that are connected electrically may generate a dangerous
accumulation of no-load voltage between two different electrode
holders or torches, the value of which may reach double the
allowed limit.
An expert coordinator must be designated to measuring the
apparatus to determine if any risks subsist and suitable protection
measures can be adopted, as foreseen by section 7.9 of the
applicable standard "EN 60974-9: Arc welding equipment. Part 9:
Installation and Use".
RESIDUAL RISKS
- OVERTURNING: position the welding machine on a horizontal
surface that is able to support the weight: otherwise (e.g. inclined
or uneven floors etc.) there is danger of overturning.
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