ANDELI TIG-250MGLC User manual

USER`S MANUAL
(Please read carefully before operation)

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Please read first
Thank you for purchasing our welder products!
If you can correctly install and use the equipment, it will
be of great benefit to your safety and that of others. Please do
not install, use or repair the equipment without carefully
reading the instructions.
Date of purchase：
Welder No.：
Welding model number：
Place of purchase：

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table of Contents
1. Use and characteristics：........................................................................... 3
2. Safety Precautions........................................................................................ 3
3. EMC Precautions.............................................................................................. 5
4. Key technical information.......................................................................... 7
5. Welding machine installation：................................................................ 8
6. Model compilation and description：...................................................... 9
7. Summary of principles：............................................................................ 10
8. Operation instructions：.......................................................................... 11
9. Points for Attention and Maintenance of Welding Machine：........ 20

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Uses and characteristics
TIG cold welding machine series inverter DC gas shielded welding machine
set manual welding, common argon arc welding, cold welding, cleaning four
functions,it can realize the welding of carbon steel, stainless steel, copper,
titanium and other materials. Due to the ideal static and external
characteristics of this series of welders,property and good dynamic
characteristics, control function is relatively complete, so it shows the
following characteristics:
IGBT high frequency soft switching conversion, high efficiency, small
volume, light weight；
The advanced control scheme significantly improves the performance of
the welder and meets the welding process requirements to a greater
extent;
MMA welding, common TIG welding, cold welding, cleaning machine for
multiple purposes;
Cold welding is suitable for spot welding of thin plates, and the
workpiece does not change color;
Cleaning function, cleaning common argon arc welding workpiece color;
Easy arc starting, stable arc and high welding quality;
Hand arc welding has small spatter, stable current, high reliability
and good weld formation;
Digital panel adjustment, complete functions, multi-parameter
adjustment;
Safety Precautions
General safety precautions
Please be sure to observe the precautions stipulated in this manual,
otherwise accidents may occur.
For the design and construction of input power supply, the selection

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of installation site, and the use of high-pressure gas, please follow
the relevant standards.
Unrelated personnel should not enter the welding site.
Please have qualified personnel to install, repair, maintain and use
the welding machine.
The welding machine must not be used for purposes other than welding
(such as charging, heating, pipe thawing , etc.).
If the ground is uneven, pay attention to prevent the welding machine
from tipping over.
Prevent electric shock or burns
Do not touch live parts.
Professional electricians are required to ground the welding machine
with copper wires of specified cross section.
Professional electricians are required to connect the welding machine
to the power supply with the copper wire of the specified cross section,
and the insulation sheath shall not be damaged.
When working in a humid place with limited activity, ensure the
insulation between the body and the base material.
When working at heights, use a safety net.
When not in use, please turn off the input power.
Avoid the harm of welding smoke and gas to human body
Please use the prescribed exhaust equipment to avoid accidents such
as gas poisoning and suffocation.
When working on the bottom of the container, protective gas will be
deposited around, causing suffocation. Special attention should be
paid to ventilation.
Avoid the harm of welding arc light, spatter and welding slag to
human body.

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Please wear protective glasses with sufficient shading. Arc light can
cause eye irritation,spatter and welding slag can burn the eyes.
Please use leather protective gloves for welding, long-sleeved clothes,
hats, foot protectors, apron and other protective equipment to avoid
arcing, splash and welding slag burns and skin burns.
Prevent fire, explosion, rupture and other accidents
No combustible materials should be placed in the welding place.
Splashes and hot welding seams can cause fire.
The welding cable and the base material must be connected and fastened,
otherwise it will cause heat and cause a fire.
Please do not weld in flammable gas or on container containing
flammable substances, otherwise it may cause an explosion.
Do not weld the closed container, otherwise it will break.
Fire extinguishers should be prepared in case.
Prevents rotating moving parts from injuring people
Do not put your fingers, hair, clothes, etc. near rotating parts such
as cooling fans and wire feed wheels.
When feeding the welding wire, please do not put the end of the welding
torch close to the eyes, face and body to avoid the welding wire from
hurting people.
Prevent the gas cylinder from falling down and the gas regulator
from rupturing
Cylinders should be securely fixed, and dumping may cause personal
accidents.
Do not place the gas cylinder in high temperature or sunlight.
When opening the cylinder valve, keep your face away from the gas outlet
to avoid hurting people with high-pressure gas.
Please use the gas regulator supplied or recommended by our company,

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and observe its usage regulations.
To prevent the welding machine from hurting people during sports
When using a forklift or crane to transport the welding machine,
personnel should not be under the welding machine and in front of the
movement to prevent the welding machine from falling and being injured.
When hoisting, the rope should be able to withstand suffficient tension
and not be broken. The angle of the rope at the hook should not exceed
30 °.
EMC precautions
1、Overview
Welding can cause electromagnetic interference.
By adopting appropriate installation methods and correct methods of
use, the interference emission of arc welding equipment can be minimized.
The products described in this manual are Class A equipment (applicable to
all occasions except residential areas powered by public low-voltage power
systems)
Warning: Class A equipment is not suitable for residential
buildings powered by public low-voltage power supply systems. Due to conducted
and radiated disturbances, it is difficult to guarantee electromagnetic
compatibility in these places.
2、Environmental assessment recommendations
Before installing arc welding equipment, users should evaluate
potential electromagnetic disturbance problems in the surrounding
environment. The considerations are as follows:
（1） Are there other power supply cables, control cables, signal and
telephone lines above and around the arc welding equipment;
（2） Whether there are broadcasting and TV transmitting and receiving
equipment;
（3） Whether there are computers and other control equipment;

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（4） Whether there is high-security equipment, such as industrial
protective equipment;
（5） Consider the health of the surrounding staff, such as those without
hearing aids and those with pacemakers;；
（6） Is there any equipment for calibration or testing;
（7） Pay attention to the noise immunity of other surrounding equipment.
Users should ensure that other devices used around them are
compatible, which may require additional protective measures;
（8） Time for welding or other activities.
The scope of the environment considered depends on the building structure
and other possible activities, which may exceed the boundaries of the building
itself.
3、Ways to reduce emissions
（1） Public power supply system
Arc welding equipment should be connected to the public power supply
system in the manner recommended by the manufacturer. If interference occurs,
additional precautions should be taken, such as access to the filter in the
public power supply system. For the fixed installation of arc welding
equipment, the shielding of the power supply cable should be considered. Metal
pipes or other equivalent methods can be used for shielding. The shielding
must maintain electrical continuity. The shielding layer should also be
connected to the welding power supply shell to ensure good electrical contact
between the two.
（2） Maintenance of arc welding equipment
Arc welding equipment should be routinely maintained according to
the method recommended by the manufacturer. When the welding equipment is
in operation, all entrances, auxiliary doors and covers on the equipment
should be closed and properly tightened. Arc welding equipment should not
be modified in any form, unless there are corresponding changes and

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adjustments in the instructions. In particular, the spark gap of the arc
starting and stabilizing device must be adjusted and maintained according
to the manufacturer's recommendations.
（3） Welding cable
Welding cables should be as short as possible and close to each other,
close to or close to the ground.
（4） Bonding of equal potentiometers
Be sure to pay attention to the overlapping of all metal objects in
the surrounding environment. The overlapping of metal objects and workpieces
will increase the risk of work. When the operator touches these metal objects
and electrodes at the same time, there may be electric shock. The operator
should be insulated from all these metal objects.
（5）Workpiece grounding
For reasons such as electricity safety or the position and size of
the workpiece, the workpiece may not be grounded, such as the hull or steel
frame of the building. The connection between the workpiece and the ground
sometimes reduces the emission, but this is not always the case, so it is
necessary to prevent the increased risk of electric shock to the user or damage
to other electrical equipment caused by the workpiece grounding. When
necessary, the workpiece should be directly connected to the ground, but in
some countries it is not allowed to be directly grounded, and it can only be
achieved by selecting an appropriate capacitor according to the regulations
of the country where it is located.
（6）shield
Selective shielding of surrounding equipment and other cables can
reduce electromagnetic interference. For special applications, consider
shielding the entire welding area.

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Main technical information
1、The main technical parameters
MODEL
TIG-250MGLC
Function
TIG
MMA
Power Supply Voltage(V)
AC220V±15%
Frequency(Hz)
50/60
No-Load Voltage(V)
56
Rated Input Power(KW)
4.1
5.6
Rated Input Current(A)
18.5
25.3
Welding Current Range(A)
5-170
10-150
Duty cycle （% 40℃
10min）
40%
170A/16.8V
150A/26V
100%
108A/14.3V
95A/23.8V
Power Factor
0.7
Efficiency(%)
85
(For hidden parameters,please refer to the parameter table below )
Welder installation
1．Installation Environment
(1) The welding operation should be carried out in a relatively dry
environment. The relative humidity of the air should not exceed 90%
at 20 ° C and 50% at 40 ° C.
(2) The ambient temperature during welding should be between -10 ° C and
+ 40 ° C, and between -20 and + 55 ° C during storage and
transportation.
(3) Avoid use in direct sunlight or in the rain in the open air, and do
not allow rainwater to penetrate into the welding machine.