Shielding Gas Connection - Lincoln Electric LN-25X Operator's Manual

LN-25X™
GUn connection
WARNING
ELECTRIC SHOCK CAN KILL.
• Turn the input power OFF at the welding power source
before installation or changing drive
rolls and/or guides.
• Do not touch electrically live parts.
• When inching with the gun trigger,
electrode and drive mechanism are
"hot" to work and ground and could
remain energized several seconds after the gun trigger
is released.
• Do not operate with covers, panels or guards removed
or open.
• Only qualified personnel should perform maintenance
work.
The LN-25X™ comes with a K1500-2 gun adapter installed. To
install a gun,
1. Turn power OFF.
2. Remove the thumb screw.
3. Push the gun the completely into the gun bushing.
4. Secure the gun in place with the thumb screw.
5. Connect the trigger cable from the gun to the trigger connector
on the front of the feeder.
Note: Not all gun bushings require the use of the thumb screw.
Thumb Screw
Gun

sHielDinG Gas connection

WARNING
CYLINDER may explode if damaged.
• Keep cylinder upright and chained
to support.
• Keep cylinder away from areas
where it may be damaged.
• Never lift welder with cylinder
attached.
• Never allow welding electrode to touch cylinder.
• Keep cylinder away from welding or other live electrical
circuits.
Build up of shielding gas may
harm health or kill.
• Shut off shielding gas supply when
not in use.
• See American National Standard
Z-49.1, "Safety in Welding and
Cutting" Published by the American Welding Society.
Maximum inlet pressure is 100 psi. (6.9 bar.)
Install the shielding gas supply as follows:
1. Secure the cylinder to prevent it from falling.
2. Remove the cylinder cap. Inspect the cylinder valves and
regulator for damaged threads, dirt, dust, oil or grease. Remove
dust and dirt with a clean cloth. DO NOT ATTACH THE
REGULATOR IF OIL, GREASE OR DAMAGE IS PRESENT!
Inform your gas supplier of this condition. Oil or grease in the
presence of high pressure oxygen is explosive.
3. Stand to one side away from the outlet and open the cylinder
valve for an instant. This blows away any dust or dirt which
may have accumulated in the valve outlet.
4. Attach the flow regulator to the cylinder valve and tighten the
union nut(s) securely with a wrench. Note: if connecting to
100% CO cylinder, insert regulator adapter between regulator
2
and cylinder valve. If adapter is equipped with a plastic washer,
be sure it is seated for connection to the CO
5. Attach one end of the inlet hose to the outlet fitting of the flow
regulator. Attach the other end to the welding system shielding
gas inlet. Tighten the union nuts with a wrench.
6. Before opening the cylinder valve, turn the regulator adjusting
knob counterclockwise until the adjusting spring pressure is
released.
7. Standing to one side, open the cylinder valve slowly a fraction
of a turn. When the cylinder pressure gage stops moving, open
the valve fully.
8. The flow regulator is adjustable. Adjust it to the flow rate
recommended for the procedure and process being used before
making a weld.
A-9
INSTALLATION
cylinder.
2