Commissioning/Decommissioning
04/2019
EN 27
6.1.3 Checking how easily the pump rotates
After longer idle periods, the pump must be checked for how
easily it rotates while it is switched off and free of tension.
Turn the pump shaft in the drive lantern by hand.
- or -
Remove the fan cover and turn the fan wheel manually in the
motor rotation direction.
6.1.4 Switching the pump on
Pre-requisites:
•
Pump/unit is filled with pumping liquid and ventilated.
Please observe the sticker on the vent tap.
•
Pipes for filling and ventilating are closed.
•
Pipes are clean.
1.
Open the valve on the intake side completely.
2.
Close or slightly open the valve on the discharge side.
3.
Switch
the
pump/unit
on.
4.
As soon as the full speed has been reached, open the valve
on the discharge side completely and set the operating point.
5.
Check the mechanical seal for leaking.
NOTICE
The pump/unit may be damaged by deviating temperatures,
sounds, leakages or vibrations.
Switch
the
pump/unit
off and repair the cause.
NOTICE
Starting the unit with open pressure lines may cause the motor to
overload.
Make note of the motor’s power reserve.
Use the soft start (operation with frequency converter).
Use
speed
regulation.
6.1.5 Switching the pump off
1.
Close the shut-off valve in the pressure line.
2.
Switch
the
motor
off.
For longer idle periods:
1.
Close the shut-off valve in the suction line.
2.
Close additional connections.
