Fronius MTG 400i K4 Instructions De Service page 34

Installation and Startup
Note on inner li-
NOTE!
ner in gascooled
welding torches Risk due to incorrect wire-guide insert.
This can result in poor-quality weld properties.
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1
Checking the
clamping nipple
* Check the clamping nipple before commissioning and every time the inner liner
is changed. To do so, carry out a visual inspection:
34
If a plastic inner liner with a bronze wire-guide insert is used in gascooled
welding torches instead of a steel inner liner, the power data stated in the
technical data of the welding torch must be reduced by 30%.
In order to operate gascooled welding torches at maximum power, replace
the 40 mm (1.575 in.) wire-guide insert with a 320 mm (12.598 in.) wire-guide
insert.
Push
with sealing
Push-Pull
without sealing