Fronius MTB 400s G/R/Pipe Bedienungsanleitung Seite 26

Danger from operation without coolant.
This can result in damage to property.
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Fitting / chan-
ging wear parts
Overview of wear parts
Connecting the
1
hosepack to the
PushPull drive
unit
26
CAUTION!
Never commission water-cooled devices without coolant.
During welding, ensure that the coolant is circulating correctly. When
using Fronius cooling units, this will be the case if proper return flow of
coolant can be seen in the cooling unit's coolant container.