SPECK Pumpen IN-VB 6-30 F [60/100] Faults

Safety

10 EN 11|2018

2.8 Faults

 In case of a fault, immediately switch the pump off and remove it from operation.

 Have all faults repaired immediately.

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 6.1.4 on page 22.

 Clean pump.

2.9 Preventing material damage

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.

2.9.2 Dry running

Mechanical seals and interior parts can be destroyed within seconds due to dry running.

 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.

2.9.3 Cavitation

Pipework which is dimensioned too long and too small before the pump/unit increases the resistance.

Therefore there is a danger of cavitation.

 Ensure that the suction line does not leak.

 Observe the maximum pipe length and dimensions.

 Only switch the pump on when the valve on the delivery side is opened halfway.

 Open the valve on the suction side completely.

2.9.4 Overheating

The following factors can result in the pump overheating:

• Motor overload switch set incorrectly.

• Ambient temperature which is too high.

• Excessive pressure on the delivery side.

 Always install a motor protection switch and set it correctly.

 Do not exceed the permitted ambient temperature of 40 °C.

 The minimum flow rate must be adhered to. The minimum flow rate corresponds to a percentage of

the maximum flow rate Q

max

dependent on the temperature of the pumped fluid. See "Fig. 1" on page