Speck pumpen BADU 42-AK Fiche Technique De Pre-Installation page 67

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2.9 Preventing material damage
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2.9.1 Leakage and pipe breakage
Vibrations and thermal expansion can cause pipes to break.

Install the pump/unit in a manner which reduces structure-
borne and airborne noise transmission. When doing so,
observe relevant regulations.
If the pipe forces are exceeded, leaks can occur at the screwed
connection or the pump itself.

Do not use the pump as a fixed point for the pipe line.

Connect pipes free of load and mount them elastically. Install
compensators if necessary.

If the pump leaks, the unit may not be operated and must be
disconnected from the mains power supply.
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2.9.2 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.
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2.9.3 Cavitation
Pipes which are too long increase resistance. This results in risk
of cavitation.

Ensure that the suction line does not leak.

Observe the maximum pipe length.

Only switch the pump on when the valve on the delivery side
is opened halfway.

Open the valve on the suction side completely.
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2.9.4 Overheating
The following factors can result in the pump overheating:
• Excessive pressure on the delivery side.
• Motor overload switch set incorrectly.
• Ambient temperature which is too high.

Do not operate the pump with the valves closed, minimum
flowrate 10 % of Qmax.
10|2015
Safety
EN 11