Kemppi Promig 520R - Manual (Page 12)

12 – PROMIG 520R, 120R / 0544 © KEMPPI OY
A
C
G
B
E
D
F
3.5. BURN BACK TIME
The system includes an electronic burn back control which is pre-set.
3.6. GROUND CABLE
Use at least 70 mm2 cables. Thinner cross-sectional areas cause overheating of connectors and
poor Pulsed MIG performance.
Never use a damaged welding gun!
3.7. SHIELD GAS
Handle gas bottle with care. There is a risk for injury if gas bottle or bottle valve is
damaged!
For welding stainless steels, mixed gases are normally used. Check that the gas bottle valve is
suitable for the gas. The flow rate is set according to the welding power used in the job. A suitable
flow rate is normally 8 - 15 l/min. If the gas flow is not suitable, the welded joint will be sporous.
Contact your local Kemppi dealer for choosing gas and equipment.
3.7.1. Installing gas bottle
Always fasten gas bottle properly in vertical position in a special holder on the wall or
on a carriage. Remember to close gas bottle valve after having finished welding.
Parts of gas flow regulator
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
Following installing instructions are valid for most gas flow regulator types:
1. Step aside and open bottle valve (A) for a while to blow out possible impurities.
2. Turn press regulation screw (B) of regulator until no spring pressure can be felt.
3. Close needle valve if there is one in the regulator.
4. Install regulator on bottle valve and tighten connecting nut (C) with a wrench.
5. Install hose spindle (D) and jacket nut (E) into gas hose and tighten with hose clamp.
6. Connect hose with regulator and the other end with wire feed unit. Tighten jacket nut.