NOTICE
Overheating caused by foreign bodies in the cooling system
Foreign bodies in the cooling system can cause blockages in individual circuits. As a result,
the water-cooled components overheat and the drive fails.
● For this reason, make sure that no foreign bodies can enter the water circulation system.
● Only remove the protective cover immediately prior to connecting the water circuit.
Connect the re-cooling unit
Connect the deionized water circuit of the re-cooling unit to the deionized water piping of the
drive. Refer to the associated information about the ionized-water connections in the dimension
drawing.
The inlet and outlet pipes are appropriately marked. When connecting the re-cooling unit,
ensure that the inlet pipe and return pipe are connected correctly. Only use the supplied
connecting pipes.
Hand-tighten the union nut ③ of the connecting pipe for the inlet and return pipes.
① Inlet (blue)
② Return (red)
③ Union nut
Figure 5-4 Water piping
To establish the connection of the raw water circuit, observe the details in the dimension
drawing.
Assembly
5.6 Connecting the water circuits
SINAMICS PERFECT HARMONY GH150 6SL3825
Operating Instructions 05/2020 67
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