Lincoln Electric LTP SERIES User manual

IM2074
06/2016
REV00
LTP SERIES HAND HELD TIG
(GTAW) TORCHES CE
OPERATOR’S MANUAL
ENGLISH
GRAPHICS MAY VARY
LINCOLN ELECTRIC EUROPE S.L
c/o Balmes, 89 - 8
0
2
a
, 08008 Barcelona, Spain
www.lincolnelectric.eu

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Easy Start

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Download
You can download this manual: from http://www.lincolnelectric.com/en-gb/support/Pages/operator-manuals-eu.aspx

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III
Declaration of conformity
Lincoln Electric Europe
Declares that the TIG torches:
LTP17/18/18SC/20/26
conform to the following directives:
Low Voltage Equipment (2006/95/EC)
Electromagnetic Compatibility (2004/108/EC)
and has been designed in compliance with the following standards:
EN 60974-7
4
th
May 2016
Pietro Terranova
Accessories Product Manager EMEA
Lincoln Electric Europe S.L, c/o Balmes, 89 – 8°2
a
, 08008 Barcelona, Spain
12/05

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IV
12/05
THANKS!
For having choosen the QUALITY of the Lincoln Electric products.
•Please Examine Package and Equipment for Damage. Claims for material
damaged in shipment must be notified immediately to the dealer.
•For future reference record in the table below your equipment identification
information. Model Name, Code & Production lot can be found on the box.
Model Name:
………………...……………………
……….…….…………………………………………………………..
Code & Serial number:
………………….…………………………………..
………………….…………………………………..
Date & Where Purchased:
………………….…………………………………..
………………….…………………………………..
ENGLISH INDEX
Safety ...............................................................................................................................1
Preparation and Operator Instructions..............................................................................2
Specifications ...................................................................................................................4
Installation ........................................................................................................................5
Maintenance .....................................................................................................................7
WEEE...............................................................................................................................8
Spare Parts.......................................................................................................................8
Warranty Information ........................................................................................................8

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Safety
01/11
WARNING
This equipment must be used by qualified personnel. Be sure that all installation, operation,
maintenance and repair procedures are performed only by qualified person. Read and understand
this manual before operating this equipment. Failure to follow the instructions in this manual could
cause serious personal injury, loss of life, or damage to this equipment. Read and understand the
following explanations of the warning symbols. Lincoln Electric is not responsible for damages
caused by improper installation, improper care or abnormal operation.
WARNING: This symbol indicates that instructions must be followed to avoid
serious personal injury, loss of life, or damage to this equipment. Protect
yourself and others from possible serious injury or death.
READ AND UNDERSTAND INSTRUCTIONS: Read and understand this
manual before operating this equipment. Arc welding can be hazardous.
Failure to follow the instructions in this manual could cause serious personal
injury, loss of life, or damage to this equipment.
ELECTRIC SHOCK CAN KILL: Welding equipment generates high voltages.
Do not touch the electrode, work clamp, or connected work pieces when this
equipment is on. Insulate yourself from the electrode, work clamp, and
connected work pieces.
ELECTRICALLY POWERED EQUIPMENT: Turn off input power using the
disconnect switch at the fuse box before working on this equipment. Ground
this equipment in accordance with local electrical regulations.
ELECTRICALLY POWERED EQUIPMENT: Regularly inspect the input,
electrode, and work clamp cables. If any insulation damage exists replace the
cable immediately. Do not place the electrode holder directly on the welding
table or any other surface in contact with the work clamp to avoid the risk of
accidental arc ignition.
ELECTRIC AND MAGNETIC FIELDS MAY BE DANGEROUS: Electric current
flowing through any conductor creates electric and magnetic fields (EMF).
EMF fields may interfere with some pacemakers, and welders having a
pacemaker shall consult their physician before operating this equipment.
CE COMPLIANCE: This equipment complies with the European Community
Directives.

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ARTIFICIAL OPTICAL RADIATION: According with the requirements in
2006/25/EC Directive and
EN 12198 Standard, the equipment is a category 2. It makes mandatory the
adoption of Personal Protective Equipments (PPE) having filter with a
protection degree up to a maximum of 15, as required by EN169 Standard.
FUMES AND GASES CAN BE DANGEROUS: 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 from the 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 from durable flame-resistant material to
protect you skin and that of your helpers. Protect other nearby personnel with
suitable, non-flammable screening and warn them not to watch the arc nor
expose themselves to the arc.
WELDING SPARKS CAN CAUSE FIRE OR EXPLOSION: 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 material until the proper steps have been taken to
insure that no flammable or toxic vapors will be present. Never operate this
equipment when flammable gases, vapors or liquid combustibles are present.
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.
SAFETY MARK: This equipment is suitable for supplying power for welding
operations carried out in an environment with increased hazard of electric
shock.
Preparation and Operator Instructions
General
These high quality TIG welding torches were specifically developed for more delicate welding and
easier handling.They are available in gas-cooled and water-cooled versions. If properly used and
maintained, our welding torches are extremely durable. In order to ensure a long life cycle, please
read these instructions carefully.
This manual is only for the experienced user. Do not allow untrained persons to install, handle or
maintain our LTP TIG welding torches. Welding torches must be checked regularly in order to
guarantee optimum life expectancy.
The user is fully responsible for possible defects arising out of misuse, inadequate maintenance,
damage,poor repairs, or modifications by other parties than the original manufacturer or his
authorised dealers.
The welding torch is a component of a complete welding system. The torch will generate an electric
arc when connected with the appropriate welding machine. Ensure that you read the welding
machine’s instructions thoroughly before using our welding torches.

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The manufacturer reserves the right, whenever necessary and without prior notice, to amend these
instructions as a result of clerical or printing errors, incorrect information, or the addition of
improvements.
Except for the tungsten electrode – which must be ordered separately – our welding torches are
delivered ready for immediate connection to our welding machines.
Before welding
•Check the torch is firmly connected to welding machine.
•Check the torch is fitted with the correct parts for task.
•Check the parameters in the welding machine.
•If water cooled: is the cooling unit properly working and is there sufficient coolant flow?
•Has gas been tested to prevent contamination and / or to check gas pressure ?
TIG operations
•Set the tig torch to the required start position.
•Ignite the arc with the on/off button (when torch is fitted with a gas valve (V-torch), open the
gas valve and assure the gas coverage is available. After this, start the ignition by contacting
work piece).
•After ignition keep the torch at the start point until establish a weld pool.
•Guide the torch constant during the whole seam length following the instructions.
•Press the stop button at the end of the welding job (when torch is fitted with a gas valve (V-
torch), lift the torch until the arc tears off. Then close the gas valve).
•Continue to hold torch at final position for a few seconds to allow molten pool to solidify without
atmospheric disturbances (shielded by gas flow).
WARNING
•Avoid contact with hot torch parts and work pieces.
•The operator must wear protective clothing and adequate ventilation must be available.

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Specifications
Operating Temperature -10°C ~ 55°C (14°F ~ 131°F)
Storage Temperature -25°C ~ 55°C (-4°F ~ 158°F)
Relative air humidity Up to 90% at a temperature of 20°C
“
Ergo
”
/
“
Flex Ergo
”
types
“
V
”
type (Valve)
TECHNICAL DATA
(*)
17 Ergo/17V
18
Ergo
/18 Flex Ergo 18SC Ergo 20 Ergo
26
Ergo
/26Flex Ergo/26V
Power rating AC 100A 30A 80A 165A 130A
DC 140A 3 0A 400A 0A 180A
Duty Cycle 35% 100% 100% 100% 35%
Electrode Φ (mm) 1.0÷ .4 1.0÷4.0 1.0÷4.0 1.0÷3. 1.0÷4.0
Torch lenght 4-8 mt 4-8 mt 4-8 mt 4-8 mt 4-8-1
(**)
mt
Voltage class L L L L L
Welding gas
Argon
DIN
3 5 6/1
Argon
DIN
3 5 6/1
Argon
DIN
3 5 6/1
Argon
DIN
3 5 6/1
Argon
DIN
3 5 6/1
Gas flow rate (lt/min) 7÷15 7÷ 0 7÷ 0 8÷ 7÷18
Cooling Gas Water Water Water Gas
Highest temperature
cooling medium
at entry hose package
- 60°C 60°C 60°C -
Minimum quantity
of cooling flow - 1.0 lt/min 1.0 lt/min 1.0 lt/min -
Lowest pressure of entry - .5 bar .5 bar .5 bar -
Highest pressure of entry - 5.0 bar 5.0 bar 5.0 bar -
Net weight (g) (4mt) 0 5/18 5 515/ 515 ---- 1715 545/ 545/ 445
Net weight (g) (8mt) 3555/3395 4515/4515 4565 915 4305/4305/4 05
Net weight (g) (1 mt) ----/---- ----/---- ---- ---- 6065/----/----
(*) LTP 17/18/20/26 are also available with French lever (cylindric handle, only 8mt and std neck).
Optional 3-button and potentiometer modules aren’t available for the French lever versions.
(**) LTP26 12m is available only with Ergo handle and Fixed neck

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Installation
WARNING
Also follow operating instructions provided with the welding machine.
WARNING! The power source must be deactivated!
Gas-cooled connection
Connecting power cable and gas hose
Connect the power cable and the gas hose to the appropriate connectors on the welding machine
and ansure tight connections by properly affixing the couplings.
Exception
When torch is fitted with a gas valve (V-torch), connect separate gas hose to an external gas
cylinder. But before connecting it to the gas cylinder, open the gas bottle’s pressure regulator a few
times briefly to flush away any dirt. After that, make the connection and tighten with a wrench.
You can then set the desired pressure using the pressure regulator.
The pressure will depend on the item to be welded and the gas cup size.
Connecting switching cable
Connect the welding torch plug into the appropriate socket on the welding machine, and check for a
solid connection.
Water-cooled connection
Connecting power cable and gas hose
Connect the power cable and the gas hose to the appropriate connectors on the welding machine
and ansure tight connections by properly affixing the couplings.
Connecting (blue) water inlet hose and (red) water outlet hose
Connect the blue water inlet hose and red water outlet hose by inserting gas nipple into the
appropriate nipple receptors on the welding machine according to the colour markings. Ensure that
the connections are solid.
Connecting switching cable
Connect the welding torch plug into the appropriate socket on the welding machine, and check for a
solid connection.
Read the instructions of your welding machine prior
to use so as to be sure how to attach your welding
torch.
Read the instructions of your welding machine prior
to use so as to be sure how to attach your welding
torch.

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Colour coding switching cable
The LTP torches can be fitted to a large variety of welding machines according to the diagram below
and according to the switching module functionality of the torch.
SWITCH MODULE
FUNCTION
WIRE/COLOR MARKING
1 button switch start/stop orange + brown
3 button switch
start/stop orange + brown
down red + black
up yellow + black
1 button switch
with potentiometer
start/stop orange + brown
potmeter red + black + yellow
start: start welding process stop: stop welding process
up/down: increasing/decreasing welding current/browsing machine program (depends on machine)
potmeter: stepless up/down function
LTP TIG welding torches are normally supplied with a single button switch.
In order to inter-operate with the new generation of welding machines, LTP TIG welding torches can
be fitted with optional 3-button switch and/or an integrated potentiometer.
The following switching modules are available:
(Dis)assembly of the LTP handle and switch module
Single-button
(works with
standard
5 pins plug)
Single-button
with potentiometer
(works with
optional 6 pins plug)
3-button
(works with
standard
5 pins plug)

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(1)
(2)
(3)
(4)
(5)
(6)
Maintenance
WARNING
Before carrying out maintenance work: switch off power and gas supply.
Check regularly the function of the torch. Make regularly maintenance work and cleaning.
Maintenance and cleaning should be done only by authorized persons. Replace any damaged,
deformed or worn parts immediately. If repairs are necessary contact your local Lincoln dealer.
Check TIG welding torch if:
•All parts are undamaged and in the correct place.
•Electrode and fastening parts are undamaged and properly fastened.
•If surface of tungsten electrode is not smooth, the electrode should be grinded.
•Flow of shielding gas is free and even.
•Gas nozzle is in good condition.
Check cable assembly if:
•Insulation of handle and torch cable are undamaged.
•All power, coolant and gas connections are clean and fastened.
•Leather and sheathing show no external damage such as cracks or (fire-) holes.
•There are no sharp bends in torch cable (or hose).
Tips for grinding the electrode
A properly grinded electrode determines the consistency of the current density and direction
of the arc. Electrodes must always be ground in longitudinal direction. The type of electrode and
angle of sharpening depends on the material you want to weld. For professional grinding please
consult your local dealer.
Purchase of wear parts
The most important and common wear parts are given in the tables on the following pages.
For ordering or locating omitted components, please contact your local Lincoln dealer.
Assembly front side of welding torch
A) Place collet (1) in collet body (2) and screw these by hand
on torch body (3)
B) Screw ceramic cup (4) on collet body (2)
C) Insert Tungsten electrode (5) from the rear; make sure electrode
has sufficient length.
D) Screw back cap (6) onto torch body (3) from rear.
Maximum length of electrode depends on type of back cap.
Important:
•As a standard, the LTP TIG torches are not be supplied with
tungsten electrodes. Contact your dealer for more info.
•Electrode can be sharp!
•Collet, collet body and tungsten electrode must have the same
diameter.

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WEEE
07/06
English
Do not dispose of electrical equipment together with normal waste!
In observance of European Directive 2012/19/EC on Waste Electrical and Electronic
Equipment (WEEE) and its implementation in accordance with national law,
electrical equipment that has reached the end of its life must be collected separately
and returned to an environmentally compatible recycling facility. As the owner of the
equipment, you should get information on approved collection systems from our local
representative.
By applying this European Directive you will protect the environment and human
health!
Spare Parts
08/12
Part List reading instructions
•Use the illustration of assembly page and the end of the catalogue to determine where the part is located
for your particular code.
•Do not use this part list for an item if its code number is not listed. Contact the Lincoln Electric Service
Department for any code number not listed.
First, read the Part List reading instructions above, then refer to the "Replacement Parts" chapter,
that contains a picture-descriptive part number cross-reference.
Warranty Information
Lincoln will assume both the parts and labor expense of correcting defects during the warranty
period. All warranty periods start from the date of purchase from Lincoln or Lincoln Authorized
Distributor to the original End User.
Warranty period is 90 days.