Wire Feed Arc Welder
Shielding Gas Installation (Continued)
NOTE: Shielding gas is not required if
GAS TYPES
There are 3 types of gas generally used for gas metal arc welding; 100% argon, a mixture of 75% argon and 25% carbon dioxide (C25) or 100% carbon dioxide. The 75/25 mixture is
ARGON OR
ARGON MIX
INSTALLATION
Cap 
OR
recommended for general steel welding. For aluminum welding, use 100% argon. Cylinders of each type gas may be obtained at your local welding supply outlet. Secure cylinder in place on your welding machine or other support to prevent the cylinder from falling over.
NOTE: Use of incorrect gas may lead to little or no penetration of welding bead.
Figure 9 - Hookup
CO2
INSTALLATION
CO2
Adapter
REGULATOR
The regulator provides a constant shielding gas pressure and flow rate during the welding process. Each regulator is designed to be used with a specific gas or mixture of gases. The argon and argon mixture use the same thread type. The 100% carbon dioxide uses a different thread type. An adapter
outlet and slowly open cylinder valve. Inspect for leaks in connections.
6.Pull trigger on gun to allow gas to flow. While trigger is pulled and gas is flowing, adjust gas regulator to at least 20 cfh (cubic feet per hour). Release trigger.
! WARNING
Extremely toxic fumes are created when zinc- or
lead or galvanized items are heated, welded or cut. Before working with any of these materials, refer to the General Safety section for instructions.
is included with this unit to change between the two.
HOOKUP PROCEDURE
Cylinder gas is under high
pressure. Point cylinder outlet away from yourself and any bystanders before opening.
1. A 20 cubic ft bottle fits this unit.
2. With cylinder securely installed, remove cylinder cap, stand to side of the cylinder opposite outlet, and open the valve slightly, turning counterclockwise. When gas is emitted from the cylinder, close valve by turning clockwise. This will blow out dust or dirt that may have accumulated around valve seat.
3. Install regulator on cylinder valve, keeping face of gauges in vertical position. Tighten stem nut securely to gas valve.
4. Install one end of gas hose on fitting on rear of welder and the other end to the fitting on the regulator. Use hose clamps on each connection. Make sure gas hose is not kinked or twisted.
5. Once again, stand opposite cylinder
7.Remember to close gas valve when finished welding.
Operation
1. Prior to using this
equipment, read,
understand, and comply MANUAL with all precautions in the General Safety section.
Also, read the entire section titled Welding Guidelines.
2.Verify welder is off.
3.Verify that surfaces of metals to be joined are free from dirt, rust, paint, oil, scale or other contaminants. These contaminants make welding difficult and cause poor welds.
!DANGER
All persons operating this equipment or in the area while equipment is in use
must wear protective welding gear including eye protection with proper shade, flame resistant clothing, leather welding gloves and full foot protection.
4.Connect work clamp to work piece or workbench (if metal). Make sure the contact is secure. Avoid surfaces with paint, varnish, corrosion, or
5.Position Heat Selector on front panel to desired setting.
See application decal inside door of wire feed compartment for proper heat settings.
NOTE: These settings are general guidelines only. Heat setting may vary according to welding conditions and materials.
6.Rotate Wire Speed Control to setting number 5. Then adjust as needed after test weld is completed.
7.Plug input cord into a proper voltage receptacle with proper circuit capacity (20 amps minimum).
8.Switch welder ON.
9.Verify that the wire is extended 1/4” from the contact tip. If not, squeeze trigger to feed additional wire, then release trigger, and then cut wire to proper length.
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