Safety
10 EN 06|2019
Seized pump
If a pump seizes, and is switched on several times repeatedly, the
motor can be damaged. Observe the following points:
Do not switch the pump/unit on repeatedly.
Turn the motor shaft by hand. See point 5.1 on page 21.
Clean pump.
2.9 Preventing material damage
2.9.1 Dry running
If run dry, mechanical seals and synthetic parts can be destroyed
within only a few seconds.
Do not allow the pump to run dry. This also applies to
checking the rotation direction.
Purge air from pump and suction line prior to start-up.
2.9.2 Cavitation
Pipes which are too long increase resistance. This results in risk
of cavitation.
Observe the maximum pipe length.
2.9.3 Overheating
The following factors can result in the pump overheating:
• Ambient temperature which is too high
Do not exceed the permitted ambient temperature of 40 °C.
2.9.4 Blockages in the pump
Pieces of dirt in the suction line can clog and block the pump.
Do not operate the pump without a strainer basket or a
strainer basket handle.
Check how easily the pump rotates before starting it up and
after longer idle or storage periods.
2.9.5 Risk of frost
Drain the pump/unit and pipes at risk of freezing in plenty of
time.
Remove the pump/unit during periods of frost and store it in a
dry room.
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