Kemppi MIG 2520 - Manual (Page 6)

6 – Kempact mig 50 / 0635 © Kemppi oy
E
B
D
C
A
F
G
2.11. SHIELDING GAS
The MIG shielding gas consists of carbon dioxide, mixed gases and argon. Shielding gas flow
rate is determined by the amount of welding current. The typical flow rate of gas in the welding
of steel is 8-15 l / min.
A Gas bottle valve
B Press regulation screw
C Connecting nut
D Hose spindle
E Jacket nut
F Gas bottle pressure meter
G Gas hose pressure meter
The following installation instructions are valid for most gas flow regulator types:
1. Step aside and open the bottle valve (A) for a while to blow out possible impurities.
2. Turn the press regulation screw (B) of the regulator until no spring pressure can be felt.
3. Close the needle valve if there is one in the regulator.
4. Install the regulator on bottle valve and tighten the connecting nut (C) with a wrench.
5. Install the hose spindle (D) and jacket nut (E) into the gas hose and tighten with a hose
clamp
6. Connect the hose with the regulator and the other end with the wire feed unit.
Tighten jacket nut.
7. Open the bottle valve slowly. The gas bottle pressure meter (F) shows bottle pressure.
Note! Do not use the whole contents of the bottle. Bottle should be filled when bottle
pressure is 2 bar.
8. Open the needle valve if there is one in the regulator.
9. Turn the regulation screw (B) until the hose pressure meter (G) shows the required flow (or
pressure). When regulating the flow amount, the power source should be switched on and
the gun switch pressed simultanously.
Close the bottle valve after welding is finished. If the machine will not be in use for a
long time, unscrew the pressure regulation screw. Always fasten the gas ottle tightly
in vertical position, to a wall stand or bottle cart, specially designed for it. For safety
reasons, always remove the gas bottle from the transport stand of the machine before
lifting of transport of the machine by car!
3. OPERATION
3.1. MAIN SWITCH AND SIGNAL LIGHTS
With the switch in the ‘I’ position, the primary and control circuits of the machine become live
and the ‘ON’ signal light on the panel lights up. The welding circuit receives voltage when the gun
switch is operated or when the wire feed test switch is pressed.
Always use the main switch to turn the machine on and off with the main switch; do not use the
power plug for this purpose.