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Connection and start-up
Warning
Read warning notice and instruction
manual carefully prior to initial
operation and save the information
for later use.
Permissible installation
Mains connection
Connect the machine to the correct mains supply. Please read
the type plate (U
) on the rear side of the machine.
1
yellow/green
brown
black
grey
1
2
Voltage stabilisation kit
The power source is configurable with a voltage stabilisation kit
as a safeguard against larger voltage variations, e.g. in case of
generator use where the machine is connected to a separate
power supply.
Connection of shielding gas
Connect the gas hose, which branches off from the back panel
of the welding machine (3), to a gas supply with pressure
regulator (2-6 bar). (Note: Some types of pressure regulators
require an output pressure of more than 2 bar to function
optimally). One/two gas cylinders can be mounted on the bottle
carrier on the back of the trolley.
Gas consumption
Depending on the welding task, gas type and seam design,
the gas consumption will vary in ranges from 6-7 l/min at low
amperages (<25A) and up to 27 l/min at max. amperage.
Material consumption
Material consumption can be estimated by calculating welding
time in minutes times wire feed speed (m/min) times weight per
meter of the welding consumables in use.
WARNING
When you activate the torch trigger, there is voltage
applied to the welding wire and electrode.
L1
3x400V
L2
3x208-440V (boost)
L3
N
3
14
Connection of welding hose
Sigma Select C / MWF 32-33
4
Important!
In order to avoid destruction of plugs and
cables, good electric contact is required
when connecting earth cables and welding
hoses to the machine.
Connection of electrode holder for MMA
The electrode holder and earth cable are connected to plus
connection (10) and minus connection (8). Observe the instructions
from the electrode supplier when selecting polarity.
Recommended cable dimensions
Welding current
DC
200 A
35 mm²
300 A
50 mm²
400 A
95 mm² / 2x50 mm²
550 A
2x70 mm²
Welding process
Distance to work piece
MIG - IAC and pulse 10 m
MIG - non pulse
30 m
c
Adjustment of wire brake
The wire brake must be adjusted so as to stop the wire reel before
the welding wire runs over the edge of the reel. The brake force
depends on the weight of the wire reel and the wire feed speed.
Factory setting is 15kg.
Adjustment:
•
Dismount the control knob by
placing a thin screw driver behind
the knob and then pull it out.
•
Adjust the wire brake by fastening
or loosening the self-locking nut
on the axle of the wire hub.
•
Remount the control knob.
MWF 30
PULSE
35 mm²
70 mm²
95 mm² / 2x50 mm²
2x70 mm²
Total cable length in
(a+b)
welding circuit (a+b+c)
20 m
60 m
a
b
4
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