5 Installation at Site
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Vitastage
CAUTION
Aggressive flushing liquid and pickling agent
Damage to the pump!
▷
Match the cleaning operation mode and duration of flushing and pickling to
the casing materials and seal materials used.
5.3.2 Permissible forces and moments at the pump nozzles
No piping-induced forces and moments (from warped pipelines or thermal
expansion, for example) must act on the pump.
5.4 Enclosure/insulation
WARNING
The volute casing and casing/discharge cover take on the same temperature as
the fluid handled
Risk of burns!
▷
Insulate the volute casing.
▷
Fit protective equipment.
5.5 Electrical system
5.5.1 Operation on a frequency inverter
The pump set is suitable for operation on a frequency inverter as per IEC 60034-17.
DANGER
Incorrect selection and setting of the frequency inverter
Explosion hazard!
▷
Observe the following information on selecting and setting a frequency
inverter.
Selection
When selecting a frequency inverter, check the following details:
▪
Data provided by the manufacturer
▪
Electrical data of the pump set, particularly the rated current
▪
Only voltage source inverters (VSI) with pulse width modulation (PWM) and
carrier frequencies between 1 and 16 kHz are suitable.
Setting
Observe the following instructions for setting a frequency inverter:
▪
Set the current limit to max. 1.2 times the rated current. The rated current is
indicated on the name plate.
Start-up
Observe the following instructions for starting the frequency inverter:
▪
Ensure short start ramps (maximum 5 seconds).
▪
Only start variable speed control after 2 minutes at the earliest.
Pump start-up with long start ramps and low frequency may cause clogging.
Operation
Observe the following limits during operation on a frequency inverter:
▪
Only utilise up to 95 % of the motor rating P
2
indicated on the name plate.
▪
Frequency range 25 to 50 Hz
Electromagnetic
compatibility
Operation on a frequency inverter produces interference emissions whose level varies
depending on the inverter used (type, interference suppression, make). To prevent
the drive system, consisting of a submersible motor and a frequency inverter, from
Summary of Contents for Vitastage
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