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SAFETY
Read the entire manual before installing and oper-
ating the AC 120.
WARNING
ELECTRIC SHOCK can kill.
• Only qualified personnel should installa-
tion or operate this equipment.
• Machine must be plugged into a receptacle
which is grounded per any national, local or
other applicable electrical codes.
• The AC 120 power switch is to be in the OFF
("O") position when connecting power cord to
input power.
• Do not touch electrically live parts or electrode
with skin or wet clothing. Insulate yourself from
work and ground.
• Always wear dry insulating gloves.
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FUMES AND GASES can be dangerous.
• Keep your head out of fumes.
• Use ventilation or exhaust to remove
fumes from breathing zone.
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WELDING SPARKS can cause fire or
explosion.
• Keep flammable material away.
• Do not weld on closed containers.
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ARC RAYS can burn eyes and skin.
• Wear eye, ear and body protection.
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INSTALLATION
GENERAL DESCRIPTION
The AC 120 is composed of a single phase trans-
former and is suitable for welding in alternate current
using stick electrodes (type 6013) with diameters from
1/16 to 5/64 in. The AC 120 is rated for a 20% duty
cycle at a rated output of 55 amps. A 55A output can
be drawn for 2 minutes out of each 10 minute period
without overheating.
SELECT SUITABLE LOCATION
This machine can operate in harsh environments.
However, it is important that simple preventative mea-
sures are followed to assure long life and reliable
operation:
• This machine must be located where there is free
circulation of clean air without restrictions for air
movement to and from the air vents. Do not cover
the machine with paper, cloth or rags when
switched on.
• Dirt and dust that can be drawn into the machine
should be kept to a minimum.
• Keep machine dry and do not place it on wet ground
or in puddles. Do not use in wet or damp locations.
Store indoors.
• Do not mount over combustible surfaces.
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CENTURY® AC 120
WARNING
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