Output Connections; Input Power Connections - Cebora MIG WELD 403 S Manual De Instrucciones

machine's performance. Fasten the rotating support to the
machine top and fix the handle, the wheeles, the bottle sup-
port and, if any, the cooling unit.

3.2 INPUT POWER CONNECTIONS

• All sections concerning the installation of this machine
must be read carefully.
• This machine must be installed by skilled personnel.
• Make sure that the input power plug has been discon-
nected before inspecting, maintaining, or servicing.
• Connect the yellow-green wire to a good electrical ground.
• Do not use water pipes as earth conductor.
• After a final inspection, the machine should be con-
nected to the input supply voltage marked on the input
power cord.
• If you wish to change the input supply voltage, remove
the right side panel (15), locate the voltage-changing ter-
minal board and arrange the connections as shown in
figure 1.
• After having changed the supply voltage, re-place the
upper cover.
• This machine must never be used without the top and side
covers. This is both for obvious safety reasons and to avoid
8
interference with the machine's internal cooling system. The
warranty is to be considered null and void if this machine is
used without the protection of its top and side covers.
• Mount a plug on the power supply cable that corresponds
to the input power drawn by the machine.

3.3 OUTPUT CONNECTIONS

3.3.1 Wire feeder connection
This power source is compatible with the wire feeders TFA2
and TFA4. To connect the power source to the wire feeder
units use the extension art. 1186 (5 mt) or 1186.20 (10 mt).
Performances and operating features of the wire feeder are
described in the operating manuals supplied with the wire
feeder itself.
3.3.2 Connecting the work return lead clamp.
• Some versions have one impedance socket only.
• Connect the male end of the work return lead to one of the
impedance taps on the front panel of the machine. The
impedance tap designated by the provides the maximum
amount of impedance
leted weld beads. This tap is recommended when welding
aluminium, stainless steel, and carbon steels of binary or ter-
nary composition. The impedance tap designated by the
provides the least amount of impedance
mended when using carbon dioxide as a shielding gas to
weld carbon steels, in the upwards vertical position, of
binary or ternary composition.
It is generally advisable to use low impedance values for
small diameter wires and high values for big diameter wires.
• After having selected the proper impedance tap, attach the
work return clamp to the work to be welded.
• Make sure that the ground clamp is tightly fastened to the
work return cable and periodically check that this connec-
tion remains well tightened. A loose connection can cause
weld current drops or overheating of the work return lead
and clamp which, in turn, creates the risk of burns from acci-
dental contact with the work return lead.
• The weld circuit must not be placed deliberately in direct
or indirect contact with the ground conductor if it is not in the
work to be welded.
• If the work to be welded is attached deliberately to the
ground by a protection lead, then the connection must be
the most direct possible and it must be done using a lead
that has a cross section that is at least equal to the cross
section of the work return lead being used for the weld cir-
cuit. The protection lead must also be attached to the work
Pict. 1
which will produce nicely fil-
and is recom-