Telwin TW821075 Manual Del Usuario página 6

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RESIDUAL RISKS
- OVERTURNING: position the welding machine on a horizontal
surface that is able to support the weight: otherwise (e.g.
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.
- Do not use the handle to hang the welding machine.
- Never lift the welding machine.
2. INTRODUCTION AND GENERAL DESCRIPTION
This welding machine is a power source used for arc welding and has
been designed specifically for MAG welding of carbon steel and low-
alloy steel with either CO
or Argon/CO
2
solid or cored (tubular) electrode wires. They are also suitable for
MIG welding of stainless steel using Argon gas + 1-2% oxygen and of
aluminium with Argon gas using electrode wires with a composition
suited to the piece to be welded (only models in Fig. B1).
It is also possible to use cored wires in applications without protective
gas by adapting the polarity of the torch to the wire manufacturer's
recommendations (Model in Fig. B2 uses only flux core wire).
STANDARD ACCESSORIES:
- torch;
- return cable complete with earth clamp;
- wheels kit (in models on wheels).
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.
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
mixture shielding gas using
2
Fig. A
- 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:
- TORCH:
The welding machine weight is shown in table 1 (TAB. 1).
4. DESCRIPTION OF THE WELDING MACHINE
CONTROL, ADJUSTMENT AND CONNECTION DEVICES
5. INSTALLATION
WARNING!
CARRY
OUT
ALL
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.
Unpack the welding machine, assemble the separate parts contained
in the package.
Assembling the protective mask
Assembling the return cable-clamp
HOW TO LIFT THE WELDING MACHINE
None of the welding machines described in this manual is equipped
with a lifting device.
SITE
Locate the welding machine in an area where openings for cooling air
are not obstructed (forced circulation with fan), leave at least 250mm
free space around the welding machine; check that conductive dusts,
corrosive vapours, humidity etc., will not enter 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 OF PLUG AND SOCKET (only applicable to
models supplied without plug): connect a normalised plug (2P +
T for 1ph, 3P + T for 3ph) 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
- 6 -
see table 1 (TAB.1)
see table 2 (TAB.2)
Fig. B1, B2
INSTALLATION
OPERATIONS
PREPARATION
Fig. C
Fig. D
Fig. E
AND
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