Forney 140 MIG WELDER, Owner'S Manual

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Shielding Gas Cylinders contain gas under high pressure. If damaged, a cylinder can
explode. Treat them carefully.
• Arc welders use only inert or non-flammable gases for welding arc protection. It is important
to choose the appropriate gas for the type of welding being performed.
• Do not use gas from unidentified cylinders or damaged cylinders.
• Do not connnect the cylinder directly to the welder. Use a pressure regulator.
• Make sure the pressure regulator and the gauges function properly.
• Do not lubricate the regulator with oil or grease.
• Each regulator is designed for use with a specific gas. Make sure the regulator is designed for
the protective gas being used.
• Make sure that the cylinder is safely secured tightly to the welder with the chain provided.
• Never expose cylinders to sparks, slag, flame or excessive heat.
• Make sure that the gas hose is in good condition.
• Keep the gas hose away from the working area.
Be sure to locate the welder according to the following guidelines:
• In areas free from moisture and dust;
• In areas with ambient temperature between 30° to 90°F;
• In areas free from oil, steam and corrosive gases;
• In areas not subjected to abnormal vibration or shock;
• In areas not exposed to direct sunlight or rain;
• Place at a distance of 12” or more from walls or similar obstructions that could restrict natural
air flow for cooling.
Since the inhalation of welding fumes can be harmful, ensure that the welding area is effectively
ventilated.
Before you make any electrical connection, make sure that supply voltage and frequency
available at site are those stated in the ratings label of your welder.
The main supply voltage should be within ±10% of the rated main supply voltage. Too
low a voltage may cause poor welding performance. Too high a supply voltage will cause
components to overheat and possibly fail. The welder outlet must be:
• Correctly installed, if necessary, by a qualified electrician;
• Correctly grounded (electrically) in accordance with local regulations;
• Connected to the correct size electric circuit.
Protective Welding Gases
Installation Recommendations
Location
Ventilation
Main Supply Voltage Requirements