Lincoln Electric POWERTEC i250C STANDARD Operator's Manual page 25

Inserting Electrode Wire into Welding
Torch

Turn the welding machine off.

Depending of welding process connect proper welding
torch to the euro socket. Rated parameters of the
torch and welding machine should be matched.

Depends on type of gun must be remove the nozzle
from the gun and contact tip or protection cap and
contact tip.

Turn the welding machine on.

Hold the Cold Inch / Gas Purge Switch [25] or use
torch trigger until wire appear over threaded end of the
gun.

When the Cold Feed switch or torch trigger is released
spool of wire should not unwind.

Adjust wire spool brake accordingly.

Turn the welding machine off.

Install a proper contact tip.

Depending on the welding process and the type of the
gun, install the nozzle (GMAW process) or protection
cap (FCAW process).
WARNING
Take precaution to keep eyes and hands away from the
end of the gun while the wire is being come out of the
threaded end.
Changing Driving Rolls
WARNING
Turn the input power off before installation or changing
drive rolls.
®
POWERTEC i250C STANDARD, POWERTEC
ADVANCED, POWERTEC
POWERTEC ® i320C ADVANCED, POWERTEC
ADVANCED, POWERTEC
equipped with drive roll V1.0/V1.2 for steel wire. For
others wires and sizes it is required to install proper drive
rolls kit (see "Accessories" chapter) and follow instruction:

Turn the input power OFF.

Unlock 4 rolls by turning 4 Quick-Change Carrier Gear
[53].

Release the pressure roll levers [54].

Change the drive rolls [52] corresponding to the used
wire.
WARNING
Be sure that the gun liner and contact tip are also size to
match the selected wire size.
WARNING
For wires with the diameter larger than 1.6mm, the
following parts have to be changed:

The guide tube of the feeding console [50] and [51].

The guide tube of the Euro Socket [49].

Lock 4 new rolls by turning 4 Quick-Change Carrier
Gear [53].

Insert the wire through the guide tube, over the roller
and through the guide tube of Euro Socket into liner of
gun. The wire can be pushed into the liner manually
for a few centimeters, and should feed easily and
without any force.

Lock the pressure roll levers [54].
English
®
i250C
®
i320C STANDARD,
® i380C
®
i450C ADVANCED are
49
Gas Connection

CYLINDER may explode if damaged.

Always fix the gas cylinder securely in an
upright position, against a cylinder wall
rack or purpose-made cylinder cart.

Keep cylinder away from areas where it
may be damaged, heated or electrical
circuits to prevent possible explosion or
fire.

Keep cylinder away from welding or other
live electrical circuits.

Never lift welder with cylinder attached.

Never allow welding electrode to touch
cylinder.

Build up of shielding gas may harm health
or kill. Use in a well-ventilated area to
avoid gas accumulation.

Close the gas cylinder valves thoroughly
when not in use to avoid leaks.
Welding machine supports all suitable shielding gases at
a maximum pressure of 5,0 bar.
Before use, make sure that the gas cylinder contains gas
suitable for the intended purpose.

Turn off input power at the welding power source.

Install a proper gas flow regulator to the gas cylinder.

Connect the gas hose to the regulator using the hose
clamp.

The other end of gas hose connect to the gas
connector on the power source rear panel.

Turn on input power at the welding power source.

Open the gas cylinder valve.

Adjust the shielding gas flow of the gas regulator.

Check gas flow with Gas Purge Switch [25].
To weld GMAW process with CO
heater should be used.
23
54 54
53
52 52 52
Figure 14
WARNING
WARNING
WARNING
WARNING
shielding gas, CO
2
50
51
52
gas
2
English