Welding Preparations; Overheating Guard - Defort DWI-160 Instrucciones De Servicio

Symbol for falling characteristic curve
GB
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
5. CABLE CONNECTION TO THE MAINS
SOCKET
Among three-core cables, two shall be the input power
cables and one double-color (yellow-green) shall be
the earthing wire with PE bushing. See fi g.
guidelines.
Using surge protector is recommended to protect the
machine from the fl uctuation of voltage.

6. WELDING PREPARATIONS

Important! Always make sure the device is un-
plugged before connecting or disconnecting the
welding cable! Connect the welding cables as shown
in (fi g. 3 ). To do so, connect the cable with the elec-
trode holder
pling and the ground terminal
quick-lock coupling. Lock the connectors in place by
turning them in a clockwise direction.
Connect the earth terminal
welded or to the support on which the part is rest-
ing. Ensure that the earth terminal is in direct contact
with the part to be welded. You should therefore avoid
coated surfaces and/or insulated materials. The elec-
trode holder cable has a special clamp at one end,
which is used to secure the electrode. The welding
safety shield must be used at all times for welding. It
protects your eyes from the radiation emitted by the
arc and nevertheless enables you to watch the weld-
ing process.
7. WELDING
After you have made all the electrical connections for
the power supply and for the welding circuit, you can
proceed as follows:
Insert the unsheathed end of the electrode into the
electrode holder
to the part you wish to weld.
8
to the positive pole quick-lock cou-
to the negative pole
direct to the part to be
and connect the earth terminal
Ensure that a good electric contact is made. Switch
on the welding set at the switch
ing current using the hand wheel
trode you wish to use. Hold the safety shield in front
of your face and rub the tip of the electrode on the
part you wish to weld as if you were striking a match.
This is the best method of igniting the arc. Check that
you have the correct electrode and current strength
on a test part.
Electrode (Ø mm)
2
2,5
3,2
4
5
Important!
Do not dab the workpiece with the electrode
since it could be damaged, making it more
diffi cult to ignite the arc.
2 for
As soon as the arc has ignited, attempt to keep it a
distance from the workpiece equivalent to the diam-
eter of the electrode.
This distance should be kept as constant as possible
during the welding process. The angle of the elec-
trode in the direction in which you are working should
be 20/30°.
Important!
Always use tongs to remove spent elec-
trodes and to
move parts that you have just welded. Please note
that the electrode holder
so that it is insulated after you have completed the
welding work.
Do not remove the slag until the weld has cooled. If
you want to continue a weld after an interruption, the
slag from your initial attempt must fi rst be removed.
Switch off and unplug the machine after operation.

8. OVERHEATING GUARD

The welding set is fi tted with an overheating guard
that protects the welding transformer from overheat-
ing. If the overheating guard trips, the control lamp
on your set will be lit. Allow the welding set to cool
for a time.
9. MAINTENANCE
Switch off and unplug the machine before carrying out
any maintenance works on it. Remove dust and dirt
from the machine at regular intervals. Cleaning is best
carried out with a fi ne brush or a cloth.
and set the weld-
to suit the elec-
Welding current (A)
40-80
60-110
80-160
120-200
150-200
must always be put down