Lincoln Electric IM348 AC-225-GLM - Manual (Page 9)

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Attaching Work Cable to Clamp
Insert work cable through strain relief hole in work clamp
and fasten securely with bolt and nut provided.
Electrode and Work Cable Replacement
Substitution of cables with larger sizes requiring connec-
tions to be made internally is not recommended.
Connections for additional lengths or larger sizes should be
properly made externally. Lincoln Electric QD (Quick
Disconnect) connectors are available for this purpose.
If either cable requires replacement for other reasons, they
should be replaced with the appropriate Lincoln parts—
and only by qualified personnel.
Welding Current Selection
Each position on the current selector switch is marked with
the output amperes for that setting. Turn the switch to the
current required for each application.
There is a slight amount of play in each switch position. It
is good practice to move the switch back and forth once
within this play after switching to a new position. This wip-
ing action keeps the contacts free from dirt and oxides.
CAUTION: Do not turn the selector switch while welding
as this will damage the contacts.
Duty Cycle
The welder is rated 18% duty cycle at 60 Hz on all switch
positions. This means that the arc can be drawn for 1.8 min-
utes out of each ten minute period without any danger of
overheating. If the welder is used for more than 1.8 minutes
during several successive ten minute periods, it may over-
heat and damage the windings. Be sure to leave the unit
“on” during each 10 minute period to let the fan motor run
for adequate cooling. Overheating reduces welder life.
WARNING—Pipe Thawing
The AC-225-GLM is not recommended for thawing or
heating of frozen pipes.
Electrode Selection Guide
See Chart on Welder and page 21.
Arc Torch (Optional Accessory)
The arc torch (see page 17) is especially suited for use on
these welders for brazing, welding non-ferrous metals and
preheating before bending and forming.
MAINTENANCE
Routine preventative maintenance is not required. See your local Lincoln Electric Authorized Field Service Shop for
necessary repairs.
LEARNING TO WELD
No one can learn to weld simply by reading about it. Skill
comes only with practice. The following pages will help
the inexperienced welder to understand welding and
develop his skill. For more detailed information order
a copy of “New Lessons in Arc Welding” listed on page
23. The Arc-Welding Circuit
The operator’s knowledge of arc welding must go beyond
the arc itself. He must know how to control the arc, and this
requires a knowledge of the welding circuit and the equip-
ment that provides the electric current used in the arc.
The serviceability of a product or structure utilizing this type of information is and must
be the sole responsibility of the builder/user. Many variables beyond the control of The
Lincoln Electric Company affect the results obtained in applying this type of information.
These variables include, but are not limited to, welding procedure, plate chemistry and
temperature, weldment design, fabrication methods and service requirements.