KSB HPK-L, Installation & Operating Manual

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6 Commissioning/Start-up/Shutdown
39 of 74
HPK-L
1136.8/15-EN
CAUTION
Start-up against open discharge line
Motor overload!
▷
Make sure the motor has sufficient power reserves.
▷ Use a soft starter.
▷ Use speed control.
1. Fully open the shut-off element in the suction head/suction lift line.
2. Close or slightly open the shut-off element in the discharge line.
3. Start up the motor.
4. Immediately after the pump has reached full rotational speed, slowly open the
shut-off element in the discharge line and adjust it to comply with the duty
point.
CAUTION
Misalignment of pump and coupling
Damage to pump, motor and coupling!
▷ When the operating temperature has been reached, switch off the pump set
and check the coupling alignment.
5. Check the coupling alignment and re-align the coupling, if required.
6.1.10 Checking the shaft seal
Mechanical seal The mechanical seal only leaks slightly or invisibly (as vapour) during operation.
Mechanical seals are maintenance-free.
Slight leakage at the seal is permissible and desirable.
A continuously increasing, heavily dripping leakage at the seal indicates that the seal
is defective and must be replaced.
6.1.11 Shutdown
ü
The shut-off element in the suction line is and remains open.
1. Close the shut-off element in the discharge line.
2. Switch off the motor and make sure the pump set runs down smoothly to a
standstill.
NOTE
If the discharge line is equipped with a non-return or check valve, the shut-off
element may remain open provided that the system conditions and system
regulations are considered and observed.
NOTE
If shut-off is not possible, the pump will run in reverse direction.
The reverse runaway speed must be lower than the rated speed.
For prolonged shutdown periods:
1. Close the shut-off element in the suction line.
2. Close the auxiliary connections.
If the fluid to be pumped is fed in under vacuum, also supply the shaft seal with
barrier fluid during standstill.
Only turn off the cooling liquid supply after the pump has cooled down.