ESAB CIGWELD XF190 Operating Manual page 29

CAUTION
DO NOT purge oxidising or flammable gases in the
presence of flame, lit cigarettes, or other sources
of ignition or in a confined space.
Close equipment valve(s) after purging, and test all
connections for leaks with a suitable leak detection
solution or soapy water. Never use a flame when
testing for leaks.
ADJUSTING FLOW RATE
With the regulator/flowmeter ready for operation,
adjust working flow rate as follows:
1. Slowly turn adjusting valve in anti-clockwise direction
to open and increase until the bobbin in the flow tube
indicates the required flow rate.
NOTE
It may be necessary to re-check the shielding gas
regulator/flowmeter flow rate following the first
weld sequence due to back pressure present within
shielding gas hose assembly.
2. To reduce flow rate, allow the welding grade shielding gas
to discharge from regulator/flowmeter by pressing the Gas
Purge button on the front of the machine, or by pressing
the trigger on the MIG Gun. Bleed welding grade shielding
gas into a well ventilated area and away from any ignition
source. Turn adjusting screw clockwise, until the required
flow rate is indicated on the gauge.
3. The correct flow rate will depend on the place and
conditions you are working in. For indoors work shielding
gas flow rate can be from 12L/min for welding thin metals
(0.6-1.0mm) when using 0.6mm MIG wire, up to 15L/min
when using thicker metals and using 0.8mm MIG wire. When
welding near draughty doorways then the gas flow rate can
go up to 18-20L/min. The tell tale sign is to ensure your
finished welds do-not have porosity holes in the surface.
Figure 5-3: Adjust Flow Rate
OPERATING MANUAL
SHUTDOWN
Close cylinder valve whenever the regulator/flowmeter is
not in use. To shut down for extended periods (more than 30
minutes).
1. Close cylinder valve tightly.
2. Remove the gas from the machine and hose by pressing
the Gas Purge button on the front of the machine, or by
pressing the trigger on the MIG Gun. Bleed gas into a well
ventilated area.
After gas is drained completely turn off the machine.
3.
Before transporting cylinders that are not secured on
4.
a cart designed for such purposes, remove regulators/
flowmeters.
WARNING
Moving Parts can cause injury!
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