Preparations, 1 unpacking, 2 positioning and location of the machine – Kemppi RA User Manual

Page 6

1.2.2 about welding

In addition to the welding machine, welding outcome is influenced by the work piece to be

welded, welding technique and the welding environment. Therefore, recommendations in this

manual must be followed.
During welding, an electric welding circuit is created between the filler wire and the welded

piece. On delivery, the welding gun euro connector is connected to the positive pole. The

terminals are located inside the wire feed case door and should not be changed unless you

intend to run a filler wire that is directed to be used in reverse polarity, electrode negative.
When a filler wire is loaded to the machine and the gun trigger is pressed, the wire feed

mechanism drives the filler wire through the wire liner to the contact tip mounted in the

welding gun. The earth return socket on the back of the machine is set as the negative

terminal, and when connected to the workpiece via the earth return lead, it completes the

welding circuit.
When the filler wire touches the work piece, a short circuit occurs, forming the needed closed

electrical circuit. A welding arc is formed and welding commences. Unrestricted current flow

is possible only when the earth return clamp is properly attached to the workpiece and the

fixing point of the clamp to the workpiece is clean, and free from paint and rust.

preparatiOns

NOTE!

Please read the separate safety instruction booklet provided before you commence welding.

Pay particular attention to the risks associated with fire and explosion.

2.1 unpacking

Make sure that you select appropriate wire feed rolls/groove type, welding gun contact tip

and wire liner, and also ensure that the machine polarity is correctly set for the material filler

type used. If using aluminium or stainless steel filler wire, we recommend you change the wire

liner to a Kemppi plastic type, which is better suited for the material.
Before using the equipment, always make sure it was not damaged during transportation.

Also check that you have received what you ordered and that there are instructions for it.
The packaging material of the products is suitable for recycling.
environment
The machine is suitable for both indoor and outdoor use, but it should be protected from rain

and sunshine. Store the machine in a dry and clean environment and protect it from sand and

dust during use and storage. The recommended operating temperature range is –20…+40 °C.

Place the machine in such a way that it does not come in contact with hot surfaces, sparks and

spatters. Make sure the air flow into the machine is unrestricted.

2.2 positioning and location of the machine

Place the machine on a firm, dry and level surface. Where possible, do not allow dust or other

impurities to enter the machines cooling air flow.
Notes for positioning the machine

• The surface inclination should not exceed 15 degrees.

• Ensure the free circulation of the cooling air. There must be at least 20 cm of free space

around the machine for cooling air to circulate.

• Protect the machine against heavy rain and direct sunshine.

NOTE!

The machine should not be operated in the rain as the protection class of the machine,

IP23S, allows for outside preserving and storage only.

NOTE!

Never use a wet welding machine.

Kempact RA 181A, 251R, 251A, 253R, 253A, 253RMV, 253AMV, 323R, 323A, 323RMV, 323AMV