6 Commissioning/Start-up/Shutdown
6.1 Commissioning/start-up
6.1.1 Start-up
DANGER
Start-up with defective earth conductor
Personal injury from electric shock!
▷ Never switch on a pump set without an earth conductor or with a defective
earth conductor.
CAUTION
Starting up the pump set outside the fluid
Damage to the motor!
▷ Only start up pump sets when the motor is filled and the unit is fully submerged
or flooded!
CAUTION
Operation with closed shut-off element
Damage to motor and bearings!
▷ Never let the pump set run against a closed shut-off element for more than two
minutes.
CAUTION
Continuous operation against a throttled shut-off element
Damage to pump and motor!
▷ In continuous operation against a throttled shut-off element, the flow rate
must not fall short of Q
min
(see name plate).
✓ The pump set has been assembled as specified in this manual.
✓ The pump set has been installed as described in this manual.
✓ The power cables, including control and measuring cables, have been fastened
and connected in the control box.
✓ The control box and protective equipment have been installed and set properly.
✓ The pump set is completely submerged or flooded.
1.
Close the shut-off element on the discharge side.
2. Start up the pump set.
3. Slowly open the shut-off element until the duty point is reached.
NOTE
When starting against an empty pipe, make sure that the air contained in the pipe
can escape to the atmosphere.
NOTE
It is not necessary to delay the start-up of a shut-off element with electric actuator,
as the running-up time of the pump is shorter than the dead time of the shut-off
element.
6 Commissioning/Start-up/Shutdown
UPA, UPZ, BSX
39 of 64
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