Lincoln Electric IM623 LFA 3.1 & 4.1 Fume Extraction Arms - Manual (Page 13)

B-1 OPERATION B-1
Read and understand this entire section before oper-
ating your LFA 3.1 or 4.1 Extraction Arm.
SAFETY INSTRUCTIONS
Do not attempt to use this equipment until you have
thoroughly read all operating and maintenance man-
uals supplied with your equipment and any related
welding machine it will be used with. They include
important safety precautions, operating and mainte-
nance instructions and parts lists.
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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WELDING SPARKS can cause fire or
explosion.
• Keep flammable material away.
• Do not weld upon containers which
have held combustibles.
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ARC RAYS can burn.
• Wear eye, ear and body protection.
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FUMES AND GASES
can be dangerous.
• Although the removal of the particu-
late matter from welding smoke may
reduce the ventilation requirement,
concentrations of the clear exhausted
fumes and gases may still be haz-
ardous to health. Avoid breathing
concentrations of these fumes and
gases. Use adequate ventilation
when welding. See ANSI Z49.1,
"Safety in Welding and Cutting", pub-
lished by the American Welding
Society.
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Only qualified personnel should operate this equip-
ment.
ADDITIONAL SAFETY PRECAUTIONS
Always operate the fan with the arm installed and all
covers in place as these provide maximum protection
from moving parts and insure proper vacuum opera-
tion and cooling air flow.
OPERATING INSTRUCTIONS
Turn on the connected extraction system.
For details, refer to the Operating Instructions in the
Mobiflex 200-M, Mobiflex 400-MS, or SF2400
Stationary Fan manual, as appropriate.
For optimum fume capture, position the hood within
10-15 inches (250-400 mm) of the arc. Use the rotary
valve on the base of the hood to adjust the airflow to
an apropriate level, if desired.
If using a Lamp Kit:
The switch on the hood with a lamp symbol operates
the work lamp in the hood.
If using an Auto Start/Stop Arc Sensor:
The arc sensor will automatically switch the fan on
when it senses an arc. Standard run-out time is
approximately 20 sec. The work lamp operates inde-
pendently of this sensor.
LFA 3.1 & 4.1 FUME EXTRACTION ARMS
WARNING