Description
The PumpSaver® Plus Model 234-P protects single-phase pumps from dry-well, dead-head, rapid-cycle, jammed impellers,
and over/undervoltage conditions. Typical applications include residential waterwells, commercial waterwells, irrigation
wells, golf courses, and other sprinkler systems. The Model 234-P is designed to be mounted inside a Grundfos* control
box** to protect 1⁄3–3 hp, 2- or 3-wire, 230 V pumps. An infrared LED communicates directly with a hand-held diagnostic
tool called the Informer (sold separately).
A calibration adjustment allows the 234-P to be calibrated to your specific pumping applications, reducing the possibility
of false or nuisance tripping. A unique microcontroller-based 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 234-P deactivates its output relay and directly disconnects the pump motor. The 234-P then begins its user-selectable
restart delay (dry-well recovery) timer. When the timer counts to zero or power is removed and reapplied, the 234-P
reactivates its output relay and turns the pump back on. By leaving the restart delay knob in the reset position, the 234-P
will operate in manual reset mode.
The Informer displays parameters including calibration points, trip points, run time and last faults. An IR Kit-12 (12” fiber
optic kit) allows the Informer to access these parameters even when the 234-P is enclosed in a control box. This is valuable
for troubleshooting the pump while it is running.
NOTE: The PumpSaver® models have a sensitivity adjustment for the dry-well trip point. After calibration is done, you can adjust the sensitivity for the dry-well/dead-head trip point
from 70 % - 90 % of the full load. This makes the unit even more adaptable to varying pumping applications. If you have a very low producing well, increase the sensitivity closer to the
90 % mark, or if you have a very heavy producing well, decrease the sensitivity around the 70 % mark.
* Grundfos is a trademark of its respective owner.
**The Model 234-P is not recommended for use with the Grundfos Deluxe Control Box.

FEATURES BENEFITS
Proprietary microcontroller-based circuitry Constant monitoring of voltage and current protects pumps from
fault conditions
Onboard sensitivity adjustment Allows user to adjust the current sensitivity for the dry-well/deadhead
trip point from 70 %–90 % of the full load
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