Symbols And Technical Data - Defort DWM-181 Instrucciones De Servicio

10. Ensure adequate ventilation for welding, particularly
in small rooms since the process causes smoke and
harmful gases.
11. Do not carry out any welding work on tanks that have
been used to store gases, fuels, mineral oil or the like,
even if they have been empty for a lengthy period of
time, since any residue will result in a danger of explo-
sion.
12. Special regulations apply in areas where there is a po-
tential risk of fi re and/or explosion.
13. Welds that are exposed to large stresses and must
comply with safety requirements may only be com-
pleted by specially trained and approved welders. Ex-
amples of such welds include pressure vessels, rails,
trailer hitches, etc.
14. Only use a power source (with earthing contact) that is
protected with a slow-blow fuse, a slow-triggering cir-
cuit breaker and a residual current device.
The fuses must comply with the relevant regulations
(VDE 0100). To comply with these regulations, only
fuses or circuit breakers suitable for the cross-section
of the cables may be used. The use of too high a fuse
may result in the cable burning and fi re damage to the
building.
This appliance is not designed for commercial use.
CONSTRICTED AND WET AREAS
When working in constricted, wet or hot areas, use insu-
lating supports and intermediate layers as well as slip-on
gloves made of leather or other non-conductive materials
to insulate your body against the fl oor, walls, conductive
parts of the machine and the like.
If you use small welding transformers for welding in places
with an increase electrical risk, for example in constricted
areas with conductive walls, (tanks, pipes, etc.), in wet
areas (which make work clothes wet) and in hot areas
(perspiration on work clothes), the output voltage of the
welding set when idling must not exceed 42 V (effective
value). Therefore, the appliance may not be used for these
purposes because its output voltage is higher than this.
SAFETY CLOTHING
1. While working, the welder must protect his entire body
from radiation and burns by wearing suitable clothing
and a face guard.
2. Slip-on gloves made of a suitable material (leather) must
be worn on both hands. They must be in perfect condi-
tion.
3. Suitable aprons must be worn to protect clothing from
sparks and burns. A safety suit and, if necessary, head
protection must be worn if required by the type of work
in question, e.g. overhead welding.
PROTECTION FROM RADIATION
AND BURNS
1. Provide information about the risk to eyes at the work-
ing site in the form of a poster with the wording «Cau-
tion - do not look at the fl ames». Workplaces are to be
screened off wherever possible so that personnel in the
vicinity are protected. Unauthorized persons are to be
kept away from the welding work.
2. The walls in the immediate vicinity of stationary work-
places should not have a light color or a sheen. Windows
up to head height are to be protected against radiation
passing through them or refl ecting off them, for example
by coating them with a suitable paint.

4. SYMBOLS AND TECHNICAL DATA

Single-phase transformer
50 Hz Mains frequency
U Mains voltage
1
I max Rated maximum mains current
1
Fuse with rated value in A
U Rated idling voltage
0
I Welding current
2
Ø mm Electrode diameter
nc/nc Number of welding electrodes
1
that can be melted.
a) from a cold state up to the trip
point of the temperature monitor
(nc) and
b) within the fi rst hour from the
cold state (nc )
1
nh/nh Number of welding electrodes that
1
can be melted
a) in a hot state between the
temperature monitor switching
on and off (nh)
and
b) over a period of one hour in a
hot state from being switched on
again (nh )
1
Symbol for falling characteristic curve
Symbol for manual arc welding with
sheathed rod electrodes
IP 21 Protection type
H Insulation class
X Duty Cycle (measured in % from
standard 5 min cycle). For in-stance,
10% means that each 30 seconds use
shall be followed by 4 min 30 sec break.
Stick to this to prolong the service life of
your welding machine.
The set is interference-suppressed in compliance with EC
Directive 89/336/EEC
GB
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