6 Commissioning/Start-up/Shutdown
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Sewatec (60 Hz)
WARNING
Abnormal noises, vibrations, temperatures or leakage
Damage to the pump!
Risk of personal injury!
▷
Switch off the pump (set) immediately.
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Eliminate the causes before returning the pump set to service.
ü
The pump, suction line and discharge line have been vented and primed with the
fluid to be handled.
1.
Fully open the shut-off element in the suction head/suction lift line.
2.
Close/slightly open the shut-off element in the discharge line; fully open the
shut-off element if a check valve is installed.
3.
Start up the motor.
4.
Immediately after the pump has reached full rotational speed, swiftly open the
shut-off element in the discharge line and adjust it to comply with the duty
point.
Frequency inverter
When the pump is started up via frequency inverter, ensure short start ramps
(approximately 3-5 seconds).
NOTE
Only start speed-controlled operation after at least 3-5 minutes at the earliest.
Pump start-up with long start ramps and low frequency may cause clogging.
6.1.3 Shutdown
1.
Close the shut-off element in the discharge line.
If the discharge line is equipped with a non-return or check valve, the shut-off
element may remain open if there is back pressure.
2.
Switch off the motor.
Make sure that the pump set runs down smoothly to a standstill.
Prolonged shutdown
periods
For prolonged shutdown, close the shut-off element in the suction line.
Danger of frost/freezing
If there is any danger of frost/freezing, drain the pump and protect it against
freezing.
6.2 Operating limits
DANGER
Non-compliance with operating limits for pressure, temperature, fluid handled and
speed
Hot or toxic fluid could escape!
Explosion hazard!
▷
Comply with the operating data indicated in the data sheet.
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Avoid prolonged operation against a closed shut-off element.
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Never operate the pump at temperatures exceeding those specified in the data
sheet or on the name plate unless the written consent of the manufacturer has
been obtained.
