Lincoln Electric IM366 SP-100 - Manual (Page 12)

Extension Cord
If an extension cord is required, use one that is rated
for the application and is 3 conductor #14 AWG (2.1
mm
2 ) or larger. The recommended maximum lengths
are 25 ft (7.5 m) if #14 AWG (2.1 mm 2 ) is used and 50
ft (15 m) if #12 AWG* (3.3 mm 2 ) is used.
*AMERICAN WIRE GAUGE
SHIELDING GAS
When using the GMAW process, a cylinder of carbon
dioxide (CO
2
) or argon-carbon dioxide mixed shielding
gas, flow regulator, and an inlet gas hose must be
obtained.
The Lincoln K463 CO
2
or K499 Ar-mixed gas regula-
tor and hose kit is recommended for use with the SP-
100.
Weld shielding gas may be obtained from a welding
supply distributor.
1. Chain the cylinder to a wall or other stationary sup-
port to prevent the cylinder from falling over.
Insulate the cylinder from the work circuit and earth
ground.
2. With the cylinder securely installed, remove the
cylinder cap. Stand to one side away from the out-
let and open the cylinder valve very slightly for an
instant. This blows away any dust or dirt which
may have accumulated in the valve outlet.
– 12 –
Flow regulator
Gas hose
Cylinder valve
BE SURE TO KEEP YOUR FACE AWAY FROM THE
VALVE OUTLET WHEN “CRACKING” THE VALVE.
Never stand directly in front of or behind the flow
regulator when opening the cylinder valve. Always
stand to one side.
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3. Attach the flow regulator to the cylinder valve and
tighten the union nut securely with a wrench. Flow
regulator for carbon dioxide
must have plastic
washer seated in the fitting that attaches to the
cylinder.
4. Attach one end of inlet gas hose to the outlet fitting
of the flow regulator and tighten the union nut
securely with a wrench. Connect the other end to
the SP-100 inlet gas fitting (5/8 – 18 female threads
— for CGA – 032 fitting). Make certain the gas
hose is not kinked or twisted.
5. For CO
2
, open the cylinder valve slowly. For argon-
mixed gas, open cylinder valve slowly a fraction of
a turn. When the cylinder pressure gauge pointer
stops moving, open the valve fully.
6. If using a regulator with an adjustable flowmeter,
close the gun trigger and adjust the flow to give 15
–20 cubic ft per hour (CFH) (7 – 10 L/min) [use 20
– 25 CFH (10 – 12 L/min) when welding out of posi-
tion or in a drafty location for C0
2
]. For argon mixed
gas, adjust the flow to give 25-30 CFH (12-14
L/min).
7. Keep the cylinder valve closed, except when using
the SP-100. When finished welding:
a) First close the cylinder valve to stop gas flow,
b) then depress the gun trigger briefly to release the
pressure in the gas hose.
c) turn off the SP-100.
OPTIONAL ACCESSORIES INSTALLATION
K463 C0
2
Gas Regulator and Hose Kit
Install the pressure-flow regulator to a cylinder accord-
ing to the instructions in Section 1.10. Make certain
the plastic washer is seated in the fitting that attaches
to the C0
2
cylinder. Connect one end of the 10 foot
(3.0 m) hose to the SP-100 gas inlet fitting and the
other end to the regulator outlet fitting.
The K463 C0
2
pressure-flow regulator is preset at the
factory to give a flow rate of 20 cubic feet per hour (10
l/min). This setting cannot be changed.
The K463 C0
2
pressure-flow regulator can be used on
a cylinder of argon-mixed gas if a CGA-580-320
(Western Enterprises No. 810) adapter is used
between the cylinder and the regulator.
CYLINDER may explode if damaged.
• Keep cylinder upright and chained to
support.
• Keep cylinder away from areas where
it may be damaged.
• Never lift welder with cylinder attached.
• Never allow welding electrode to touch cylinder.
• Keep cylinder away from welding or other live elec-
trical circuits.
BUILDUP OF SHIELDING GAS may
harm health or kill.
• Shut off shielding gas supply when not
in use.
SEE AMERICAN NATIONAL STANDARD Z-49.1,
“SAFETY IN WELDING AND CUTTING” PUBLISHED
BY THE AMERICAN WELDING SOCIETY.
------------------------------------------------------------------------
WARNING
WARNING