KSB CHTRa, Инструкция по установке и эксплуатации

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6 Commissioning/Start-up/Shutdown
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CHTRa
CAUTION
Blocking of rotor
Damage to the rotor!
▷
If the turning gear does not begin operation after a period of 10 seconds, the
pump has to cool down until the pump casing temperature is ≤ 60
℃ before it is
returned to service.
▪ If it cannot be ensured that the turning gear turns the rotor within a period of 10
seconds after standstill of the pump set (n = 0 rpm), solenoid valves for example
have to be installed for the jacket cooling.
▪
If the pump set reaches a speed of n = 500 rpm, the solenoid valves, for example,
stop the jacket cooling.
▪ One minute after putting into service of the turning gear, the jacket cooling has
to be activated by means of solenoid valves, for example.
▪ The pre-warming unit (if any) remains in operation.
▪
Close the shut-off element in the discharge line. If the discharge line is equipped
with a check valve, the shut-off element in the discharge line may remain open
as long as there is some back pressure.
▪ Monitor the minimum flow valve to make sure it works.
NOTE
The cooling water system remains ON!
6.7.2 Shutdown for maintenance of the pump set or prolonged standstill
6.7.2.1 Pump set with electric motor
1. Close the shut-off element in the discharge line.
2. Monitor the minimum flow valve to make sure it works.
3. For pump sets with variable speed coupling:
Reduce the speed until the minimum head or minimum speed is reached.
4. Switch off the drive, making sure it runs smoothly down to a standstill.
5. Note the run-down time.
CAUTION
Unintentional starting of pump set
Damage to the shaft!
▷
Secure the drive against unintentional start-up, e. g. by disconnecting the
motor.
6. Close the shut-off valve in the minimum flow line.
7. Close the shut-off element in the inlet line.
8. Turn off the cooling water supply when the casing temperature (measured at
the pump nozzles) is lower than 50 °C.
9. Close all other pipes.