6 Commissioning/Start-up/Shutdown
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Amarex KRT
6.2 Operating limits
DANGER
Non-compliance with operating limits
Damage to the pump set!
▷ Comply with the operating data indicated in the data sheet.
▷ Avoid operation against a closed shut-off element.
▷ Never operate the pump set at ambient or fluid temperatures exceeding those
specified in the data sheet or on the name plate.
▷ Never operate the pump set outside the limits specified below.
6.2.1 Frequency of starts
CAUTION
Excessive frequency of starts
Damage to the motor!
▷ Never exceed the specified frequency of starts.
To prevent high temperature increases in the motor and excessive loads on the
motor, sealing elements and bearings, the frequency of starts shall not exceed 10
start-ups per hour.
These values apply to mains start-up (DOL or with autotransformer or soft starter).
These limits do not apply to operation on a frequency inverter.
CAUTION
Re-starting while motor is still running down
Damage to the pump set!
▷ Do not re-start the pump set before it has come to a standstill.
▷ Never start the pump set while the pump is running in reverse.
6.2.2 Operation on the power supply network
DANGER
Non-compliance with permissible supply voltage tolerances
Explosion hazard!
▷ Never operate nonincendive pump sets outside the specified range.
The maximum permissible deviation in supply voltage is ±10 % of the rated voltage.
The voltage difference between the individual phases must not exceed 1 %.
6.2.3 Operation on a frequency inverter
DANGER
Operation outside the permitted frequency range
Explosion hazard!
▷ Never operate an explosion-proof pump set outside the specified range.
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