Telwin MIG-MAG 220 A Manuel D'utilisation page 6

inclined or uneven floors etc.) there is danger of overturning.
- IMPROPER USE: it is hazardous to use the welding machine
for any work other than that for which it was designed (e.g.
de-icing mains water pipes).
- MOVING THE WELDING MACHINE: Always secure the gas
bottle, taking suitable precautions so that it cannot fall
accidentally (if used).
The safety guards and moving parts of the covering of the
welding machine and of the wire feeder should be in their proper
positions before connecting the welding machine to the power
supply.
WARNING! Any manual operation carried out on the moving
parts of the wire feeder, for example:
- Replacing rollers and/or the wire guide;
- Inserting wire in the rollers;
- Loading the wire reel;
- Cleaning the rollers, the gears and the area underneath them;
- Lubricating the gears.
SHOULD BE CARRIED OUT WITH THE WELDING MACHINE
SWITCHED OFF AND DISCONNECTED FROM THE POWER
SUPPLY OUTLET.
2. INTRODUCTION AND GENERAL DESCRIPTION
This welding machine is a source of current for arc welding, made
specifically for MAG welding carbon steel or steel that is weakly
bonded with CO shielding gas or Argon/CO
2
wire (tubular).
They are also suitable for MIG welding stainless steel with Argon gas
+ 1-2% oxygen and aluminium and CuSi (brazing) with Argon gas,
using electrode wires that are suitable for the piece to be welded.
Flux-core wire without shielding gas can also be used, adjusting torch
polarity according to what is indicated by the wire producer.
It is particularly suitable for light structural work and body shops, for
welding zinced panels, high stress, stainless steel and aluminium.
MAIN FEATURES
- Synergic operation (automatic);
- Burn-back time according to the wire speed;
- Thermostat safeguard;
- Protection against accidental short-circuits caused by contact
between the torch and the earth;
- Protection against irregular power supply (power voltage too high
or too low);
- Polarity inversion (Flux Welding);
STANDARD ACCESSORIES
- torch;
- return cable complete with earth clamp;
OPTIONAL ACCESSORIES
- Argon bottle adapter;
- Trolley;
- Self-darkening helmet;
3. TECHNICAL DATA
DATA PLATE
The most important data regarding use and performance of the
welding machine are summarised on the rating plate and have the
following meaning:
1- EUROPEAN standard of reference, for safety and construction
of arc welding machines.
2- Symbol for internal structure of the welding machine.
3- Symbol for welding procedure provided.
4- Symbol S: indicates that welding operations may be carried out
in environments with heightened risk of electric shock (e.g. very
close to large metallic volumes).
5- Symbol for power supply line:
1~ : single phase alternating voltage;
3~ : 3-phase alternating voltage.
mixes using flux-core
2
Fig. A
6- Protection rating of the covering.
7- Technical specifications for power supply line:
- U : Alternating voltage and power supply frequency of welding
1
machine (allowed limit ±10%).
- I : Maximum current absorbed by the line.
1 max
- I : effective current supplied.
1eff
8- Performance of the welding circuit:
- U : maximum no-load voltage (open welding circuit).
0
- I /U : current and corresponding normalised voltage that the
2 2
welding machine can supply during welding.
- X : Duty cycle: indicates the time for which the welding
machine can supply the corresponding current (same column).
It is expressed as %, based on a 10 min. cycle (e.g. 60% = 6
minutes working, 4 minutes pause, and so on).
If the usage factors (on the plate, referring to a 40°C
environment) are exceeded, the thermal safeguard will
trigger (the welding machine will remain in standby until its
temperature returns within the allowed limits).
- A/V-A/V : shows the range of adjustment for the welding
current (minimum maximum) at the corresponding arc voltage.
9- Manufacturer's serial number for welding machine identification
(indispensable for technical assistance, requesting spare parts,
discovering product origin).
10- : Size of delayed action fuses to be used to protect the
power line.
11- Symbols referring to safety regulations, whose meaning is given
in chapter 1 "General safety considerations for arc welding".
Note: The data plate shown above is an example to give the meaning
of the symbols and numbers; the exact values of technical data for
the welding machine in your possession must be checked directly on
the data plate of the welding machine itself.
OTHER TECHNICAL DATA
- WELDING MACHINE: see table 1 (TAB.1)
- TORCH: see table 2 (TAB.2)
The welding machine weight is shown in table 1 (TAB. 1).
4. DESCRIPTION OF THE WELDING MACHINE
CONTROL DEVICES: ADJUSTMENT AND CONNECTION.
WELDING MACHINE (Fig. B)
At the front:
1- Control panel (see description).
2- Cable and welding torch.
3- Cable and earth clamp.
At the back:
4- Main ON/OFF switch.
5- Shielding gas hose connector.
6- Power supply cable.
In the reel space:
7- Positive terminal (+).
8- Negative terminal (-).
N.B. Polarity inversion for FLUX welding (no gas).
WELDING MACHINE CONTROL PANEL (FIG. C)
1- LED indicating main power supply presence.
2- LED indicating alarm (safety thermostat activation, short-circuit
between torch and earth cable, over/undervoltage.
3- mm : Welding power adjustment.
4- : Arc length adjustment.
: default setting
: lower arc voltage
: upper arc voltage
5. INSTALLATION
WARNING! ALL INSTALLATION OPERATIONS AND
ELECTRICAL CONNECTIONS MUST ALWAYS BE CARRIED
OUT WITH THE WELDING MACHINE SWITCHED OFF AND
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