Operating Limits; Frequency Of Starts - KSB UPA Installation & Operating Manual

56 of 98
6 Commissioning/Start-up/Shutdown
CAUTION
Wrong direction of rotation
Damage to the motor!
▷ Do not run the pump set for more than two minutes when checking the
direction of rotation.
CAUTION
Uncontrolled backflow of the fluid from the riser
Damage to the pump set!
▷ Prevent any uncontrolled backflow of the fluid handled with suitable means.
▷ Make sure that backflow of the fluid handled is slow and controlled, so that
the pump rotor does not start to rotate, e.g. by throttling the discharge-side
gate valve accordingly.
ü The back-up name plate has been attached at the place of installation of the
submersible borehole pump. (ð Section 4.8, Page 24)
ü The pump set has been installed completely.
ü The power cable and, if applicable, the measuring cable and control cable have
been connected in the control cabinet.
ü The shut-off element in the discharge line is slightly open.
1. Switch on the motor at the control cabinet. (ð Section 6.1.1, Page 54)
2. As soon as the system has reached a steady state, read off the pressure and/or
flow rate from the pressure gauges.
3. Verify the read data against the data on the back-up name plate.
ð If the values are almost identical, the direction of rotation is correct.
ð If the read values are too low, the direction of rotation is incorrect.
4. If the direction of rotation is incorrect, switch the motor off at the control
cabinet.
5. Have a trained electrician correct the phase sequence (U, V, W) on the motor
connection side in the control cabinet or, in case of frequency inverter
operation, change the direction of rotation by adjusting the parameters.

6.2 Operating limits

CAUTION
Non-compliance with operating limits
Damage to the pump set!
▷ Comply with the operating data indicated on the data sheet.
▷ Avoid operation against a closed shut-off element.
▷ Never operate the pump set outside the limits specified below.

6.2.1 Frequency of starts

CAUTION
Excessive frequency of starts
Risk of damage to the motor!
▷ Never exceed the specified frequency of starts.
UPA / UPA S