Murex Tradesmig 280?3 User manual

Valid for serial no. 5090349 301 104 050606
Tradesmig 280−3
Instruction manual

-- 2 --
declaration
DECLARATION OF CONFORMITY
Murex Welding Products Ltd.
Declare hereby that:
Murex Tradesmig 280-3
Part No. 0349 308 070
Manufactured after 1st June 2005
Sconform with the requirements of Council Directive 72/23/EEC, amended by
Council Directive 93/68/EEC, relating to electrical equipment designed for use
within certain voltage limits.
Sconform with the requirements of Council Directive 89/336/EEC, amended by
Council Directive 93/68/EEC, relating to electromagnetic compatibility.
Sare manufactured in accordance with EN60974-1 Safety Requirements for Arc
Welding Equipment.
Sare manufactured in accordance with EN60974-10 Electromagnetic Compatibility
for Arc Welding Equipment.
On behalf of oMurex Welding Products Ltd.
H
a
n
o
e
r
H
o
s
e
Q
e
e
n
s
g
a
t
e
Hanove
r
House, Queensgate
Britannia Road, Waltham Cross
Herts. EN8 7TF
England
Henry Selenius
Vice President
ESAB Welding Equipment AB
695 81 LAXA
SWEDEN
Manufactured by Esab Welding Equipment AB.

ENGLISH
−3 −
TOCe
1 SAFETY 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2 INTRODUCTION 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.1 Equipment 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3 TECHNICAL DATA 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4 INSTALLATION 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.1 Placing 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.2 Assembly of components 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.3 Electrical installation 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.4 Mains power supply 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5 OPERATION 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.1 Connection and control devices 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.2 Functions explanation 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6 MAINTENANCE 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.1 Inspection and cleaning 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7 FAULT TRACING 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
8 ORDERING OF SPARE PARTS 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DIAGRAM 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
WEAR COMPONENTS 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ACCESSORIES 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

−4 −
T280−3e
1 SAFETY
Users of welding equipment have the ultimate responsibility for ensuring that anyone who works on
or near the equipment observes all the relevant safety precautions. Safety precautions must meet
the requirements that apply to this type of welding equipment. The following recommendations
should be observed in addition to the standard regulations that apply to the workplace.
All work must be carried out by trained personnel well−acquainted with the operation of the welding
equipment. Incorrect operation of the equipment may lead to hazardous situations which can result
in injury to the operator and damage to the equipment.
1. Anyone who uses the welding equipment must be familiar with:
Sits operation
Slocation of emergency stops
Sits function
Srelevant safety precautions
Swelding
2. The operator must ensure that:
Sno unauthorised person is stationed within the working area of the equipment when it is
started up.
Sno−one is unprotected when the arc is struck
3. The workplace must:
Sbe suitable for the purpose
Sbe free from draughts
4. Personal safety equipment
SAlways wear recommended personal safety equipment, such as safety glasses, flame−proof
clothing, safety gloves.
SDo not wear loose−fitting items, such as scarves, bracelets, rings, etc., which could become
trapped or cause burns.
5. General precautions
SMake sure the return cable is connected securely.
SWork on high voltage equipment may only be carried out by a qualified electrician.
SAppropriate fire extinquishing equipment must be clearly marked and close at hand.
SLubrication and maintenance must not be carried out on the equipment during operation.

−5 −
T280−3e
WARNING
READ AND UNDERSTAND THE INSTRUCTION MANUAL BEFORE INSTALLING OR OPERATING.
ARC WELDING AND CUTTING CAN BE INJURIOUS TO YOURSELF AND OTHERS. TAKE PRECAU-
TIONS WHEN WELDING. ASK FOR YOUR EMPLOYER’S SAFETY PRACTICES WHICH SHOULD BE
BASED ON MANUFACTURERS’ HAZARD DATA.
ELECTRIC SHOCK −Can kill
SInstall and earth the welding unit in accordance with applicable standards.
SDo not touch live electrical parts or electrodes with bare skin, wet gloves or wet clothing.
SInsulate yourself from earth and the workpiece.
SEnsure your working stance is safe.
FUMES AND GASES −Can be dangerous to health
SKeep your head out of the fumes.
SUse ventilation, extraction at the arc, or both, to take fumes and gases away from your breathing zone
and the general area.
ARC RAYS −Can injure eyes and burn skin.
SProtect your eyes and body. Use the correct welding screen and filter lens and wear protective
clothing.
SProtect bystanders with suitable screens or curtains.
FIRE HAZARD
SSparks (spatter) can cause fire. Make sure therefore that there are no inflammable materials nearby.
NOISE −Excessive noise can damage hearing
SProtect your ears. Use earmuffs or other hearing protection.
SWarn bystanders of the risk.
MALFUNCTION −Call for expert assistance in the event of malfunction.
PROTECT YOURSELF AND OTHERS!
WARNING!
Read and understand the instruction manual
before installing or operating.
Do not use the power source for thawing frozen pipes.
WARNING!
This product is solely intended for arc welding.

−6 −
T280−3e
2 INTRODUCTION
Tradesmig 280−3 is step controlled power source in a compact design, intended for welding with solid
steel, stainless steel or aluminium wire as well as tubular wire with or without shielding gas.
2.1 Equipment
The power source is supplied with:
SWelding gun
SReturn cable 3,5m with return clamp
SShelf for gas cylinder
SInstruction manual
3 TECHNICAL DATA
Tradesmig 280−3
Voltage 400−415V, 3∼50/60 Hz
Permissible load at
100% duty cycle 150A
60 % duty cycle 190A
35 % duty cycle 250A
Setting range (DC) 40A/16,0V−280A/26,5V
Open circuit voltage 15,0−37,0V
Open circuit power 340W
Power factor at max load 0,97
Control voltage 42V, 50/60Hz
Wire feed speed 1,0−17m/min
Burnback time 0−0,25s
Spot welding 0,2−2,5s
Welding gun connection EURO
Wire dimension range 0,6−1,2(Fe, SS)
1,0−1,2(Al)
0,8−1,2(cored)
Max diameter/weight
of wire bobin
300mm/15kg
Dimensions lxwxh 860x420x730
Weight 82kg
Operating temperature −10 ÷+40oC
Enclosure class IP 23
Application classification
Duty cycle
The duty cycle refers to the time as a percentage of a ten−minute period that you can weld at a cer-
tain load without overloading.

−7 −
T280−3e
Enclosure class
The IP code indicates the enclosure class, i. e. the degree of protection against penetration by solid
objects or water. Equipment marked IP23 is designed for indoor and outdoor use.
Application class
The symbol indicates that the power source is designed for use in areas with increased
electrical hazard.
4 INSTALLATION
The installation must be executed by a professional.
WARNING!
This product is intended for industrial use. In a domestic environment this product may cause radio
interference. It is the user’s responsibility to take adequate precautions.
4.1 Placing
Position the welding power source such way that its cooling air inlets and outlets are
not obstructed.
4.2 Assembly of components
For packing and shipment of the machine the wheels are detached from the unit.
Before use attach the wheels according to instruction.
WARNING!
1.
3.
2.

−8 −
T280−3e
4.3 Electrical installation
4.4 Mains power supply
Check that the unit is connected to the correct mains power supply voltage, and that it is protected by
the correct fuse size. A protective earth connection must be made, in accordance with regulations.
Rating plate with supply connection data
Tradesmig 280−3
Voltage V 400−415V, 3∼50/60 Hz
Current A
at 100% duty cycle 7,0
at 60% duty cycle 10,2
at 35% duty cycle 14,6
Cable area mm24 x 1,5
Fuse slow A 16

−9 −
T280−3e
5 OPERATION
General safety regulations for the handling of the equipment can be found on
page 4. Read through before you start using the equipment!
WARNING!
Rotating parts can cause injury, take great care.
WARNING −TIPPING RISK!
There is a risk of tipping while transportation and operation, if the welding machine leans
more than 10o. In that case appropriate securing has to be provided !
5.1 Connection and control devices
1Mains supply switch 7Connection for return cable (−), low inductan-
ce
2Indicating lamp, power ON/OFF 8Knob for spot welding −ON/OFF and time set-
ting
3Orange indicating lamp, overheating 9Knob for wire speed setting
4Welding voltage switch, 10 steps 10 Digital instrument −V/A (option,see page 15)
5EURO −connector for welding gun 11 Knob for burn−back time setting (located on
control board)
6Connection for return cable (−), high inductance

−10 −
T280−3e
5.2 Functions explanation
5.2.1 Overheating protection
When the machine is switched on with the mains switch [1], indicating lamp [2] is on and
lamp [3] off −the machine is ready to operate. If the internal temperature becomes too
high, the welding is interrupted and disabled. This state is indicated by lighting of the
orange indicating lamp [3] on the front of the machine. It resets automatically when the
temperature has fallen.
6 MAINTENANCE
Regular maintenance is important for safe, reliable operation.
Note!
All guarantee undertakings from the supplier cease to apply if the customer himself
attempts any work in the product during the guarantee period in order to rectify any
faults.
6.1 Inspection and cleaning
Check regularly that the power source is free from dirt.
The power source should be regularly blown clean using dry compressed air at reduced
pressure. More frequently in dirty environments. Otherwise the air inlet/outlet may be-
come blocked and cause overheating.
Welding gun
SCleaning and replacement of the welding gun’s wear parts should take place at
regular intervals in order to achieve trouble−free wire feed. Blow the wire guide
clean regularly and clean the contact tip.
The brake hub
The hub is adjusted when delivered, if
readjustment is required, follow the instructions
below. Adjust the brake hub so that wire is slightly
slack when wire feed stops.
SAdjusting the braking torque:
STurn the red handle to the locked position.
SInsert a screwdriver into the springs in the hub.
Turn the springs clockwise to reduce the braking torque
Turn the springs anticlockwise to increase the braking torque. NB: Turn both
springs through the same amount.

−11 −
T280−3e
7 FAULT TRACING
Try these recommended checks and inspections before sending for an authorised service technican.
Type of fault Actions
No arc SCheck that the mains power supply switch is turned on.
SCheck that the welding current supply and return cables are
correctly connected.
SCheck that correct current value is set.
Welding current is interrupted
during welding
SCheck whether the thermal overload trip has operated
(indicated by the orange lamp on the front).
SCheck the main power supply fuses.
Thermal overload trips
operate frequently
SCheck to see whether the air inlets/outlets are clogged.
SMake sure that you are not exceeding the rated data for the
power source (i.e. that the unit is not being overloaded).
Poor welding performance SCheck that the welding current supply and return cables are
correctly connected.
SCheck that the correct current value is set.
SCheck that the correct welding wires are being used.
SCheck the main power supply fuses.
SCheck the wire feed unit −if proper rolls are applied and
properly set the pressure of the wire feeder’s pressure rollers
8 ORDERING OF SPARE PARTS
Tradesmig 280−3 is designed and tested in accordance with the international and Eu-
ropean standards IEC/EN 60974−1 and EN 50199. It is the obligation of the service unit
which has carried out the service or repair work to make sure that the product still
conforms to the said standard.

Diagram
−12 −
dT280−3
Tradesmig 280−3

Tradesmig 280−3
Edition 050606
−13 −
oT280−3
Valid for serial no. 509−XXX−XXXX
Ordering numbers
0349 308 070 Tradesmig 280−3 400−415V 3~50/60Hz

Tradesmig 280−3
Edition050606
−14 −
wT280−3
Wear components
(W. F. Mechanism 0455 890 890)
Item Denomination Ordering no. Notes
APressure roller 0455 907 001
BFeed roller
0367 556 001
0367 556 002
0367 556 003
0367 556 004
Ø 0.6−0.8mm Fe, Ss, cored wire.
Ø 0.8−1.0mm Fe, Ss, cored wire.
Ø 1.0−1.2mm Fe, Ss, cored wire.
Ø 1.0−1.2mm Al wire.
CInlet nozzle 0466 074 001
DInsert tube
0455 894 001
0455 889 001
Plastic, must be used together with item 0455 885 001,
for welding with Al wire.
Steel, must be used together with item 0455 886 001.
EOutlet nozzle
0455 885 001
0455 886 001
Must be used together with item 0455 894 001,
for welding with Al wire.
Must be used together with item 0455 889 001.
The rollers are marked with wire dimension in mm, some are also marked with inch.
Welding with aluminium wires.
In order to weld with aluminium wires, proper rollers, nozzles and liners for
aluminium wires MUST be used. It is recommended to use 3m long welding gun for
aluminium wires, equipped with appropriate wear parts.

Tradesmig 280−3
Edition 050606
Accessories
−15 −
aT280−3
Digital meter . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0349 308 400
Transformer kit for CO2heater . . . . . . . . . . . 0349 308 890