Mma Welding - Telwin ADVANCE 227 XT MV/PFC VRD Manual De Instrucciones

weld, you can remove it manually.
Resetting to normal is automatic.
- Alarm icon " " + thermal protection icon "
temperature has been reached inside the welding machine.
Resetting to normal operation is automatic. Alarm on display
"AL.2".
Negative (-) quick coupling for connecting the welding cable.
3-
4- Positive (+) quick coupling for connecting the welding cable.
Back panel
1- Mains cable with E.E.C. 2p plug + (
(For the "DUAL VOLTAGE AUTOMATIC" model the cable has no plug).
2- General luminous switch O/OFF - I/ON.
5. INSTALLATION
WARNING! CARRY OUT ALL INSTALLATION OPERATIONS
AND ELECTRICAL CONNECTIONS WITH THE WELDING MACHINE
COMPLETELY SWITCHED OFF AND DISCONNECTED FROM THE
POWER SUPPLY OUTLET.
THE ELECTRICAL CONNECTIONS MUST BE MADE ONLY AND
EXCLUSIVELY BY AUTHORISED OR QUALIFIED PERSONNEL.
PREPARATION
Unpack the welding machine, assemble the separate parts contained in
the package.
Assembling the return cable-clamp
Assembling the welding cable-electrode holder clamp
HOW TO LIFT THE WELDING MACHINE
All the welding machines described in this manual must be lifted using
the handle.
POSITION OF THE WELDING MACHINE
Choose the place to install the welding machine so that the cooling air
inlets and outlets are not obstructed (forced circulation by fan, if present);
at the same time make sure that conductive dusts, corrosive vapours,
humidity etc. will not be sucked into the machine.
Leave at least 250mm free space around the welding machine.
WARNING! Position the welding machine on a flat surface
with sufficient carrying capacity for its weight, to prevent it from
tipping or moving hazardously.
CONNECTION TO THE MAIN POWER SUPPLY
- Before making any electrical connection, make sure the rating data of
the welding machine correspond to the mains voltage and frequency
available at the place of installation.
- The welding machine should only be connected to a power supply
system with the neutral conductor connected to earth.
- To ensure protection against indirect contact use residual current
devices of the following types:
- Type A ( ) for single phase machines;
- Type B ( ) for 3-phase machines.
- To comply with the requirements of the EN 61000-3-11 (Flicker)
standard we recommend connecting the welding machine to interface
points of the power supply that have an impedance of less than:
Zmax = 0.17 ohm (200A).
- the welding machine does not fall within the requisites of IEC/EN
61000-3-12 standard.
Should it be connected to a public mains system, it is the installer's
responsibility to verify that the welding machine itself is suitable
for connecting to it (if necessary, consult the distribution network
company).
- Unless otherwise specified (MPGE), the welding machines are
compatible with power generating sets for voltage oscillations up to ±
15%.
For correct use, the power generating set must be brought to steady
conditions before being able to connect the inverter.
": an excess
Fig. D
).
Fig. E
Fig. F
- PLUG AND OUTLET:
- The 230V model is fitted at the factory with a power supply cable
and normalised plug, (2P + T) 16A/250V .
It can therefore be connected to a mains outlet fitted with fuses
or an automatic circuit-breaker; the special earth terminal should
be connected to the earth conductor (yellow-green) of the power
supply line.
Table (TAB.1) shows the recommended delayed fuse sizes in
amps, chosen according to the max. nominal current supplied by
the welding machine, and the nominal voltage of the main power
supply.
- For welding machines without a plug (115/230V models), connect
a normalised plug (2P + T) - having sufficient capacity- to the power
cable and prepare a mains outlet fitted with fuses or an automatic
circuit-breaker; the special earth terminal should be connected to
the earth conductor (yellow-green) of the power supply line. Table
(TAB. 1) shows the recommended delayed fuse sizes in amps, chosen
according to the max. nominal current supplied by the welding
machine, and the nominal voltage of the main power supply.
WARNING! Failure to observe the above rules will make the
(Class 1) safety system installed by the manufacturer ineffective with
consequent serious risks to persons (e.g. electric shock) and objects
(e.g. fire).
CONNECTION OF THE WELDING CABLES
WARNING!
CONNECTIONS MAKE SURE THE WELDING MACHINE IS SWITCHED
OFF AND DISCONNECTED FROM THE POWER SUPPLY OUTLET.
Table (TAB. 1) gives the recommended values for the welding cables
(in mm ) depending on the maximum current supplied by the welding
2
machine.

MMA WELDING

Almost all coated electrodes are connected to the positive pole (+) of
the power source; as an exception to the negative pole (-) for acid coated
electrodes.
WELDING OPERATIONS WITH DIRECT CURRENT
Connecting the electrode-holder clamp welding cable
On the end take a special terminal that is used to close the uncovered
part of the electrode.
This cable is connected to the terminal with the symbol (+).
Connecting the welding current return cable
This is connected to the piece being welded or to the metal bench
supporting it, as close as possible to the join being made.
This cable is connected to the terminal with the symbol (-).
Warnings:
- Turn the welding cable connectors right down into the quick
connections (if present), to ensure a perfect electrical contact;
otherwise the connectors themselves will overheat, resulting in their
rapid deterioration and loss of efficiency.
- The welding cables should be as short as possible.
- Do not use metal structures which are not part of the workpiece to
substitute the return cable of the welding current: this could jeopardise
safety and result in poor welding.
6. MMA WELDING: PROCESS DESCRIPTION
- It is indispensable to refer to the electrode manufacturer's instructions
regarding the correct polarity and the optimal welding current
(generally, these instructions are outlined on the packaging of the
electrodes).
- Welding current is regulated to suit the diameter of the electrode being
used and the type of soldering to be performed; an example of the
currents used for the various electrode diameters can be seen below:
- 7 -
BEFORE MAKING THE FOLLOWING