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5. Attach one end of the inlet hose to the outlet fitting of
the flow regulator. Attach the other end to the welding
system shielding gas inlet. Tighten the union nuts
with a wrench.
6. Before opening the cylinder valve, turn the regulator
adjusting knob counterclockwise until the adjusting
spring pressure is released.
7. Standing to one side, open the cylinder valve slowly a
fraction of a turn. When the cylinder pressure gage
stops moving, open the valve fully.
8. The flow regulator is adjustable. Adjust it to the flow
rate recommended for the procedure and process
being used before making a weld
SHIELDING GAS CONNECTION
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
electrical circuits.
• BUILD UP 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.
------------------------------------------------------------------------
Customer must provide a cylinder of shielding gas, a
pressure regulator, a flow control valve, and a hose from
the flow valve to the gas inlet fitting of the wire drive unit.
Connect a supply hose from the gas cylinder flow valve
outlet to the 5/8-18 female inert gas fitting on the back
panel of the Power Wave
®
300C.
M
AXIMUM INLET PRESSURE IS
100
PSI
. (6.9
BAR
.)
Install the shielding gas supply as follows:
1. Secure the cylinder to prevent it from falling.
2. Remove the cylinder cap. Inspect the cylinder valves
and regulator for damaged threads, dirt, dust, oil or
grease. Remove dust and dirt with a clean cloth.
DO
NOT ATTACH THE REGULATOR IF OIL, GREASE
OR DAMAGE IS PRESENT!
Inform your gas suppli-
er of this condition. Oil or grease in the presence of
high pressure oxygen is explosive.
3. Stand to one side away from the outlet and open the
cylinder valve for an instant. This blows away any
dust or dirt which may have accumulated in the valve
outlet.
4. Attach the flow regulator to the cylinder valve and
tighten the union nut(s) securely with a wrench.
Note:
if connecting to 100% CO
2
cylinder, insert reg-
ulator adapter between regulator and cylinder valve.
If adapter is equipped with a plastic washer, be sure it
is seated for connection to the CO
2
cylinder.
WARNING
POWER WAVE 300C
INSTALLATION
®
A-8