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B-1
OPERATION
INVERTER ARC™ 120
B-1
Read and understand this entire section before
operating your machine.
SAFETY INSTRUCTIONS
ELECTRIC SHOCK can kill.
• Do not touch electrically live parts such
as output terminals or internal wiring.
• Insulate yourself from the work and
ground.
• Always wear dry insulating gloves.
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Only qualified personnel should operate this equip-
ment. Observe all safety information throughout this
manual.
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GENERAL DESCRIPTION
The INVERTER ARC™ 120 is a 90 amp arc welding
power source which utilizes single phase input power
to produce constant current output. The welding
response of this Inverter has been optimized for stick
(SMAW) welding.
WELDING CAPABILITY
The INVERTER ARC™ 120 is rated at 70 amps, 22.8
volts, at 20% duty cycle on a ten minute basis. It is
capable of higher duty cycles at lower output currents.
If the duty cycle is exceeded, a thermal protector will
shut off the output until the machine cools. See Table
A.1 in the INSTALLATION Section for other rated out-
puts.
The INVERTER ARC™ 120 is recommended for the
following Electrode Types and Diameters:
X - 15 Amp Branch circuit or greater required.
- 20 Amp Branch circuit or greater required.
LIMITATIONS
The INVERTER ARC™ 120 is not recommended for
pipe thawing.
WARNING
FUMES AND GASES
can be dangerous.
• Keep your head out of fumes.
• Use ventilation or exhaust to
remove fumes from breathing
zone.
ARC RAYS
can burn.
• Wear eye, ear and body
protection.
WELDING, CUTTING and
GOUGING SPARKS
can cause fire or explosion
• Keep flammable material away.
• Do not weld, cut or gouge on contain-
ers that have held combustibles.
Types
Fleetweld 37
(E6013)
Fleetweld 35
(E6011)
Excalibur 7018 MR
(E7018)
1/16
X
-
-
5/64
X
-
-
3/32
X
1/8
-
-
Sizes (in.)