Description
The Model 232-Insider single-phase PumpSaver® fits inside ¹/3, 1/2,
3/4, and 1hp, 230 V Grundfos* control boxes manufactured prior to
mid 2014. The PumpSaver® Model 232-Insider is a current monitor
designed to protect single-phase pumps from dry-well, deadhead,
jammed impeller, overvoltage and undervoltage conditions.
Typical applications include residential water wells, commercial
water wells, irrigation wells, and golf course systems.
A calibration adjustment allows the 232-Insider to be calibrated
to your specific pumping application, thereby reducing the
possibility of false or nuisance tripping. A unique microcontrollerbased
voltage and current-sensing circuit constantly monitors
the incoming power for fluctuations, overcurrent, and
undercurrent. When an abnormality, such as loss of suction
is detected, the 232-Insider deactivates its output relay and
directly disconnects the pump motor. The 232-Insider then
begins its user-selectable restart delay (dry-well recovery)
timer. When the timer counts to zero or power is removed and
reapplied, the 232-Insider reactivates its output relay and turns
the pump back on. By leaving the restart delay knob in the reset
position, the 232-Insider will operate in manual reset mode. An
infrared LED communicates directly with a hand-held diagnostic
tool called the Informer (sold separately).
Note: The use of flow restrictors or unusually high head pressures at the time of calibration may
interfere with the detection of dead-head conditions. Contact Littelfuse for information on a
product to fit these applications.

FEATURES BENEFITS
Proprietary
microcontroller
based circuitry
Constant monitoring of voltage and current protects
pumps from dry-well, dead-head, jammed impeller,
and voltage faults
Adjustable restart delay Allows user to select well recovery time delay after a
dry-well condition occurs, or to select manual reset
Built in IR
communications link
Used with the Informer, allows user to see stored
faults, run time, and also troubleshoot the pump while
it’s running
LED indication Provides status and diagnostics for troubleshooting