Gas Connection - Lincoln Electric PF42 Operator's Manual

Gas Connection

WARNING

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.
WARNING
The welding machine supports all suitable shielding
gases at a maximum pressure of 5,0 bar.
WARNING
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 [7] located on the rear panel of the
machine.

Turn on input power at the welding power source.

Turn to open the gas cylinder valve.

Adjust the shielding gas flow of the gas regulator.

Check gas flow with Gas Purge Switch [13].
WARNING
To weld GMAW process with CO
gas heater should be used.
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shielding gas, CO
2 2
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Maintenance
WARNING
For any repair operations, modifications or maintenance,
it is recommended to contact the nearest Technical
Service Center or Lincoln Electric. Repairs and
modifications performed by unauthorized service or
personnel will cause the manufacturer's warranty to
become null and void.
Any noticeable damage should be reported immediately
and repaired.
Routine maintenance (everyday)

Check condition of insulation and connections of the
work leads and insulation of power lead. If any
insulation damage exists replace the lead
immediately.

Remove the spatters from the welding gun nozzle.
Spatters could interfere with the shielding gas flow to
the arc.

Check the welding gun condition: replace it, if
necessary.

Check condition and operation of the cooling fan.
Keep clean its airflow slots.
Periodic maintenance (every 200 working hours but
at least once a year)
Perform the routine maintenance and, in addition:

Keep the machine clean. Using a dry (and low
pressure) airflow, remove the dust from the external
case and from the cabinet inside.

If it is required, clean and tighten all weld terminals.
The frequency of the maintenance operations may vary
in accordance with the working environment where the
machine is placed.
WARNING
Do not touch electrically live parts.
WARNING
Before the case of machine will be removed, the
machine has to be turned off and the power lead has to
be disconnected from mains socket.
WARNING
Mains supply network must be disconnected from the
machine before each maintenance and service. After
each repair, perform proper tests to ensure safety.
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