Telwin 952862 Manual De Instrucciones página 12

the machine to switch to 230V AC operation for
safety.
In such circumstances, to resume welding, the
machine must be switched off and on again.
Wait until the LED (Fig.C(4)) has gone out completely
before switching on again.
CONTROL, REGULATION AND CONNECTION
DEVICES
WELDING MACHINE
Front Panel
1 - Positive quick plug (+) to connect welding cable.
2 - YELLOW LED: normally off, when ON it means that the
welding current cannot flow due to one of the following
faults:
- Thermal protection: inside the machine the
temperature is excessive. The machine is ON but does
not deliver current until a normal temperature is
reached. Once this happens the re-start is automatic.
- Mains over/undervoltage protection: when mains
voltage is either too high or too low the machine is
blocked.
3- GREEN LED : Connection to the mains, machine ready
to work.
4 - Potentiometer to regulate welding current with
graduated scale in Amps, which also allows regulation
during welding.
(The "DUAL VOLT AGE AUTOMA TIC" model has a
double graduated Ampere scale).
5 - Negative quick plug (-) to connect welding cable.
Back panel
1 - Mains cable with E.E.C. 2p plug + ( ).
(For the "DUAL VOLTAGE AUTOMA TIC" 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 COMPLETEL Y SWITCHED
OFF AND DISCONNECTED FROM THE POWER SUPPLY
OUTLET.
THE ELECTRICAL CONNECTIONS MUST BE MADE
ONLY AND EXCLUSIVEL Y 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 should be
lifted using the special belt supplied with the machine
(assembled as described in Fig.E).
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.
Fig. C
Fig. D
Fig. E
Fig. F
Fig. G
- The welding machine should only be connected to a
power supply system with the neutral conductor
connected to earth.
- 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! BEFORE MAKING THE FOLLOWING
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 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.
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.
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 joint
being made.
6. WELDING: DESCRIPTION OF THE
PROCEDURE
MMA WELDING
- Connect according to either type to the (+) or (-) quick
plugs.
- It is most important that the user refers to the maker's
instructions indicated on the stick electrode packaging.
This will indicate the correct polarity of the stick
electrode and the most suitable current.
- The welding current must be regulated according to the
diameter of the electrode in use and the type of the joint
to be carried out: see below the currents corresponding
to various electrode diameters:
ø Electrode (mm)
1,6
2
2,5
- 12 -
2
Welding current (A)
Min.
25 -
40 -
60 -
Max.
50
80
110