Xylem IM167 R8 Aquavar CPC (Centrifugal Pump Control) - Manual (Page 79)

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Single Pump – Submersible Pump Constant Pressure
It is possible to utilize the Aquavar ® Centrifugal Pump Controller on commercial/industrial
well and submersible turbine applications. Submersible pumps and motors require specific
installation, programming and pipe layout compared to above ground booster pump
systems. However, specific programming must be followed to meet minimum requirements
set forth by the motor manufacturer (i.e. Franklin Electric). Always consult with the appropriate
motor technical manual for motor compatibility and requirements when using a Variable
Frequency type drives.
NOTE: THE AQUAVAR IS NOT RECOMMENDED FOR RESIDENTIAL WELL APPLICATIONS.
CONSULT CENTRIPRO FOR SUITABLE VARIABLE SPEED CONTROLLERS DESIGNED FOR
RESIDENTIAL WELL PUMPS (e.g. BF15 series).
Service Factor Amps
The submersible pump will sometimes utilize the motor service factor or MAX AMPS.
Therefore, during peak use times, it is recommended to select the appropriate Aquavar based
on the MOTOR MAXIMUM AMPS or service factor amps. Normally, this can be found on
the motor nameplate or the AIM (application, installation manual). This will avoid nuisance
tripping or current overload by the Aquavar. The Aquavar is designed to protect the motor on
overcurrent! Compare the motor max amps with the list of Aquavar models.
NOTE: ALL MOTORS MUST BE THREE PHASE.
Minimum Frequency
Submersible pump motors require a minimum speed or frequency to operate properly.
Because submersible motors use the water to lubricate and cool, they require this minimum
frequency when controlled by a Variable Speed Drive. Franklin has suggested that the
Minimum Frequency is set to at least 30 HZ in the Aquavar. Therefore, it is recommended
to set the Aquavar Minimum Frequency to 30 to 35 HZ (depending on static head) in
programming group 1402. See programming section.
WARNING: FAILURE TO SET THE MINIMUM FREQUENCY FOR SUBMERSIBLE
TURBINE INSTALLATION COULD RESULT IN DAMAGE TO THE PUMP AND/OR
MOTOR.
Tank Sizing
An appropriate size diaphragm tank must be sized for smooth operation. The tank will also
provide a needed compressability at zero flow. A tank with approximately 20% of total system
volume in GPM would be recommended.
PROGRAMMING