NURIS LN 350 Quick start guide

08/2022 Rev. 1.1
OPERATIONAL MANUAL
LN 350
EN

08/2022 Rev. 1.1
All rights reserved by Nuriş Teknoloji A.Ş. Reproduction of all or any part of this document is
prohibited without the written permission of Nuriş Teknoloji A.Ş. Information and images in this
document are subject to change without notice by Nuriş Teknoloji A.Ş.

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CONTENTS
Contents ...............................................................................................................................................i
Safety ..................................................................................................................................................ii
Electr omagnetic Compatibility (EMC) ......................................................................................................iii
Techni cal Spe cifications ........................................................................................................................ iv
1.Intr oduction....................................................................................................................................... 1
2.Conne ction Guide ............................................................................................................................... 2
2.1. Pow er Connection....................................................................................................................... 2
2.2. Conne ction of the Welding Wir e ................................................................................................... 2
2.2.1 Placing the Wir e Spool .......................................................................................................... 2
2.2.2 Wir e Feeding System............................................................................................................. 3
2.3. Gas connection........................................................................................................................... 4
3.Stor age and Installation....................................................................................................................... 5
3.1. Stor age and Oper ation Environment.............................................................................................. 5
3.2. Tr anspor tation ........................................................................................................................... 5
3.3. Installation ................................................................................................................................ 5
4.Oper ation.......................................................................................................................................... 6
4.1. Sele cting Syner gic Pr ograms......................................................................................................... 6
4.2. Symbols and Meanings ................................................................................................................. 8
4.3. Settings..................................................................................................................................... 9
4.4. Pr ogr ams..................................................................................................................................11
5. Maintenance and Trouble Shooting......................................................................................................11
5.1. Per ıodic Maintenance.................................................................................................................12
5.1.1. Daily Maintenance ..............................................................................................................12
5.1.2. Quar ter ly Maintenance........................................................................................................12
5.1.3. Semi-Annually Maintenance .................................................................................................12
5.2. Non-Per iodic Maintenance ..........................................................................................................12
5.3. Possible Pr oblems and Error s.......................................................................................................13
5.3.1. Err or Messages and Meanings ...............................................................................................15
6. Tr anspor tation .................................................................................................................................16
7. Manufactur er Company......................................................................................................................16
8. Ser vice............................................................................................................................................16

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SAFETY
Please read this manual carefully before operating the equipment. This device
should be used only by qualified personnel. Safe operation is only possible with
understanding thepossible risksfor health and correct operationof the device.
Nuriş Teknoloji is not responsible for any injury, death, or malfunction of the
device due to the improper use or lack of understandingfor the identifiedrisks.
ELECTRIC SHOCK CAN KILL: Arc welding machines can generate high voltages
during the operation. Do not touchthe live parts such aselectrode clamp, work
clamp or electrode. Always use the insulated part of the electrode clamp. Wear
protective insulating gloves to prevent riskof electric shock. Do not touch any
damaged cables.
FUMES AND GASES CA N BE DA NGEROUS: Welding may produce fumes and
gases hazardous to health. Avoid breathing these fumes and gases. To avoid
these dangers, the operator must use enough ventilation or exhaust to keep
fumes and gases away fromthe breathing zone.
ARC RAYS CAN BURN: Use a shield with the proper filter and cover plates to
protect your eyes from sparks and the rays of the arc when welding or
observing. Use suitable clothing made fromdurable flame-resistant materialto
protect you skin and that of your helpers. Protect other nearby personnelwith
suitable, non-flammable screening and warn them not to watch the arc nor
expose themselves to the arc.
WELDINGSPARKS CAN CAUSE FIRE OR EX PLOSION: Remove fire hazards from
the welding area and have a fire extinguisher readily available. Welding sparks
and hot materials from the welding process can easily go through small cracks
and openings to adjacent areas. Do not weld on any tanks, drums, containers,
or materialuntilthe proper stepshave been taken toensure that no flammable
or toxic vaporswill be present.
ELECTRIC AND MAGNETIC FIELDS MAY BE DANGEROUS: Electric current
flowing through any conductor creates electricand magnetic fields (EMF). EMF
fields may interfere with some pacemakers, and welders having a pacemaker
should consult their physician before operating thisequipment .
WELDED MATERIALS CAN BURN: Welding generates a large amount of heat.
Hot surfaces and materials in work area can cause serious burns. Use gloves
and pliers when touching or moving materials in the work area.

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ELECTROMAGNETIC COMPATIBILITY (EMC)
This machine has been designed in accordance with all relative directives and norms. However, it
may still generate electromagnetic disturbances that can affect other systems like
telecommunications (telephone, radio, and television)or other safetysystems. These disturbances
can cause safety problems in the affected systems. Read and understand this section to eliminate
or reduce the amount of electromagnetic disturbance generated by this machine.
Before installing the machine, the operator must check the work area for any devices that may
malfunction because of electromagnetic disturbances. Consider the following:
Input and output cables, controlcables, and telephone cables that are in or adjacent to
the work area and the machine,
Radio and/or television transmittersand receivers,
Computers or computer-controlled equipment,
Safety and controlequipment for industrialprocesses,
Personalmedical devices like pacemakers and hearingaids,
Equipment for calibration and measurement.
Check the electromagnetic immunity for equipment operating in or near the work area.
The operator must be sure that all equipment in the area is compatible. This may require
additionalprotection measures.
The dimensions of the work area to consider will dependon the construction of the area
and other activities that are takingplace.
If any electromagnetic disturbancesaredetected the operator must put in place corrective actions
to eliminate these disturbances. Consider the following guidelines to reduce electromagnetic
emissions fromthe machine:
Connect the machine to the input supply accordingto this manual. If disturbances occur
if may be necessary to take additionalprecautions such as filtering the input supply.
The output cables should be kept as short as possible and should be positioned
together.
If possible, connect the work piece to ground to reduce the electromagneticemissions.
The operator must check thatconnectingthe work piece to ground does not cause
problems or unsafe operating conditions for personneland equipment.
Shielding of cables in the work area can reduce electromagnetic emissions. This may be
necessary for specialapplications.
WARNING: This machine has been designed to operate in an industrial area.
Unexpected EMC problems may occur during operation in other environments.
To operate in a domestic area, it is necessary to observe precautions to
eliminate possible electromagnetic disturbances.

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TECHNICAL SPECIFICATIONS
Nuriş, LN350C SYNERGIC DOUBLE PULSE, is a gas welding machine with inverter
technology that allows MIG / MAG (metal inert gas), MMA (covered electrode)
and ARGON (TIG) welding to be done with a single machine. Thanks to its
integrated wire feeding unit, it can be used easily in all kinds of welding works.
The technical specifications for LN 350 are given in the Table 1.
Table 1. LN 350 Technical Specifications
TECHNICAL PROPERTIES
UNIT
VALUE
Utility Voltage
VAC
380 V, 3-Phase, 50-60 Hz
Input Power
kVA
13.8
Welding Current
A
30-350
Open Circuit Voltage
V
70
Welding Voltage
V
15-39
Operating Regime (25°C)
%35
350 A
%100
270 A
Protection Class
IP
IP23S
Weight
kg
40
For any maintenance or repair operations it is recommended
to contact the nearest technical service center or Nuriş
Teknoloji. Maintenance or repairs performed by
unauthorized service centers or personnel will null and void
the manufacturer’s warranty.

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1.INTRODUCTION
Front and rear view of LN 350 are shown in Figure 1.1 and Figure 1.2,
respectively.
a. LCD Display
b. Welding Current/Wire
Speed and Material
Thickness Adjust Button
c. Welding Voltage Adjust
Button
d. Menu/Program Button
e. Welding Torch Connector
f. Handle
g. Torch Bracket
h. Electrode Clamp (“+”
outlet)
i. Earth Clamp (“-” outlet)
Figure 1.1. LN 350 (front view)
a. On-Off Switch
b. Gas Inlet Coupling
c. Three Phase Electric
(Power) Supply Input
Union
d. Heater Power Connector
e. Wire Feeder Engine
Protection Fuse
f. Gas Heater Protection
Fuse
g. Continual Wire Input
Figure 1.2. LN 350 (rear view)

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2.CONNECTION GUIDE
WARNING: The installation and first operation of the machine
should be done by authorized technical personnel.
2.1. POW ER CONNECT ION
Welder power supply works with three phase 380
Volt 50Hz utility power. The energy input cable
is located at the rear of the welder power
supply. The yellow-green cable (Figure 2.1-PE)
should be connected to protective earth. The
remaining cables are the three phase
connections (Figure 2.1-a). The phase order is
not important, thus, connect the three phase
cables to the phase supply of the utility.
Figure 2.1. Pow er Connection
2.2. CONNECT ION OF THE W ELDING W IR E
Before installing the welding wire, wear gloves to prevent
corrosion of the wire and injury to your hand.
2.2.1 PL ACING TH E W I RE S POOL
The wire adapter shown in Figure 2.2-b is opened by turning it. The welding
wire reel is placed in the wire feeder unit of the welding machine with the wire
coming from below and the adapter is tightened again.
Gas Button (Figure 2.2-c): During gas cylinder replacement or gas related
connections, the gas valve can be opened by pressing this button. Thus, it can
be checked whether the gas is coming smoothly or not.
Wire Feeding Button (Figure 2.2-d): This button is used to ensure that the wire
feeder motor rotates during the insertion of the welding wire. When the wire
is finished, the wire should be driven by pressing this button until the wire
comes out of the tip of the torch after the new wire is inserted.

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Tightening the screw too much can slow down the speed of
the wire being fed and cause machine malfunctions, while
under tightening the screw can cause the wire spool to
become tangled. Therefore, the tightening of the screw nut
must be well adjusted for a nice and effective weld.
2.2.2 W IRE FEEDING S YST EM
In Figure 2.2, the view that will appear when the cover of the wire feeder is
opened is shown.
After placing the welding wire
reel(2.2-a) it is passed through the
wire channel and brought to the
entrance of the wire feeding.
Figure 2.2. Wire Feed Mechanism
The reel screws in Figure 2.3. -c are
unscrewed and removed. After the
screws are unscrewed, the fixing
cover of the wire feeder reel drops
automatically and the wire drive
reels are reached.
Figure 2.3. W ire Feed Motor
The wire drive reels are shown in
Figure 2.4. The reels are marked
according to the wire diameter used.
Select the wire drive reels according
to the thickness and type of wire you
will use. V-grooved wire feed reels
are used for steel and stainless steel
and U-grooved ones are used for
aluminum. Also corrugated V-
grooves are used for cored wires.
Figure 2.4. Control Panel

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The welding wire is stretched from the 1st guide shown in Figure 2.5 and driven
onto the wire reel. The wire passed through the guide is inserted into the wire
drive reel channel as shown in Figure 2.5-2. The wire passed through the reels
is passed through the direction guide as in Figure 2.5-3, and the manual driving
process is completed. After the manual driving process is completed, overprints
are closed(Figure 2.4-4). By pressing the wire feed button, the wire is fed until
the wire comes out homogeneously from the tip of the torch.
If the pressure setting is too high, crushing may occur on the
wire. The round structure of the wire may be disrupted and
problems may occur while passing through the torch. In
addition, the problem of clogging in the contact nozzle may be
encountered. If the pressure is low, the wire will be loose and
the wire feeding will not be homogeneous. When adjusting the
pressure, it is done from loose to tight.
2.3. GAS CONNECTION
Argon or Argon + Helium is used for welding aluminum, magnesium, copper and
their alloys of non-ferrous metals, and Argon + Oxygen mixed gases are used for
welding stainless steels.
The oxygen ratio must never exceed 3% in welding stainless steels .
Attach the gas connection hose and regulator to the tube, loosen the
adjustment screw and turn on the gas and adjust the gas flow by tightening the
adjustment screw. If CO2 gas is to be used, a CO2 heater should be connected.
There is a power plug for the CO2heater at the rear of the welding power unit
(Figure 1.2-b).
WARNING: The 220 Volt 120-Watt socket located at the back
of the machine is only for the heater. Do not use it for other
purposes. It can damage the machine.
Figure 2.5. W ire Feed System