KSB Magnochem-Bloc, Installation & Operating Manual

Page: 37 / 96

6 Commissioning/Start-up/Shutdown
37 of 96
Magnochem-Bloc
6.1.6.1 Start-up in internal and external circulation operating modes
Start-up in internal and external circulation operating modes
ü
The system piping has been cleaned.
ü The pump, suction line and inlet tank, if any, have been vented and primed with
the fluid to be handled.
ü
The lines for priming and venting have been closed.
ü Any auxiliary lines have been opened.
1. Fully open the shut-off element in the suction head line / suction lift line.
2. Close or slightly open the shut-off element in the discharge line.
DANGER
Excessive temperatures due to asynchronous operation of the magnetic coupling
Explosion hazard!
Risk of burns!
▷ Switch off the pump set immediately.
▷ Eliminate the cause.
▷
Adhere to the starting method indicated in the data sheet.
(
ð Section 5.6, Page 28)
NOTE
Pump run-up and motor run-up must be synchronous. Overloading, overheating or
non-compliance with the design data may cause the inner and the outer rotor to
drop out of synchronisation. Signs of asynchronous operation:
- Insufficient discharge head
- Noises inside the drive
NOTE
The pump must deliver fluid immediately after start-up. If fluid is not delivered
immediately, switch off the pump and repeat the venting procedure.
3. Start up the motor.
Verify synchronous operation of pump and electric motor.
4. When there is a pressure reading on the pressure gauge, open the gate valve in
the discharge line until the correct duty point is reached.
5. For vertical installation only: Shut off the external fluid supply. (see Fig.:
external circulation line)
6.1.6.2 Start-up in low-boiling fluids and dead-end configuration operating modes
CAUTION
Dry running of the plain bearings
Damage to the pump!
▷ Adhere to the prescribed procedure for pump start-up.