Xylem IM131R01 AQUAVAR AV II - Manual (Page 45)

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VI. Single Pump - Submersible Applications and
Minimum Frequency
It is possible to use the wall mounted version of the AQUAVAR II controller with a submersible pump.
*Never attempt to mount an AQUAVAR II controller on the pump itself in these applications since the
AQUAVAR II controller is not designed to be submerged. The standard distance allowed between the
pump and the AQUAVAR II controller is up to 60 feet. If you need a longer connection, be sure to con-
tact your distributor for a drive applied filter or load reactor.
The submersible pump will often use motor service factor and will overload the AQUAVAR II controller
at maximum speed. To avoid this, select an AQUAVAR II controller based on the service factor amp rat-
ing of the motor and the maximum amps allowed by the AQUAVAR II. If you have questions about the
requirements of the submersible pump and which AQUAVAR II controller to use, please contact the
AQUAVAR
II controller distributor or factory applications Goulds Pumps.
The submersible pump can be set for either constant pressure or level control applications as
described in programming section I and section V. Normally, the constant pressure application would
use well pumps or turbines with a steady source of water. Drainage applications would normally use
a sump, effluent or sewage pump.
Minimum Frequency
Many submersible well pumps have a required minimum frequency to keep motor bearings lubricat-
ed. To avoid running the motor at lower frequencies, you can program in a minimum frequency. For
most Franklin submersible motors the minimum is 30 Hz, so a setting of 35 Hz is good.
Programming
End suction centrifugal pumps may also be used in level control systems for draining
or filling. Multiple pumps end suction or submersible systems may also be used in
level control.
NOTE