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PM-23 PUMP MONITOR MANUAL
The PM-23 Series is a variety of pump monitors
designed to protect single-phase pumps from dry-
well, dead-head, jammed impeller ,waterlogged
t a n k s , r a p i d c y c l i n g , u n d e r v o l t a g e a n d
over/underload. It includes an LCD display that shows
the voltage, current, power consumption and faults.
The trip point is user- adjustable and it also features
automatic calibration allowing adjustments for
speci c pumping applications, reducing the
possibility of false or nuisance tripping. A unique
microcontroller-based sensing circuit constantly
monitors the power and line voltage for uctuations.
When a fault is detected the PM-23 after the trip
delay— will turn off the pump . The user can select
automatic or manual reset, when automatic reset is
selected the PM will turn on the pump after the restart
delay (delay is user -adjustable).
The PM-23 is designed for motors of up to 60Amp.
Description
Wiring
The PM-23 is used only in 220 VAC single phase pumps
with a current consumption in the range of 16 to 60
Amps. Connect the 220 V voltage supply to terminals
TC and T1. Then connect the current transformer by
plugging the black wire into terminal C2 and the blue
wire to terminal C1. Insert one of the motor’s
conductors through the hole on the current
transformer (CT ).
The current transfomer has
polarity, so the conductor should exit the side
where the red mark is located and then connected
to the pump as shown on the diagram below.
IF THE CURRENT TRANSFORMER IS NOT CONNECTED PROPERLY
THE PM-23 WILL TAKE INCORRECT MEASUREMENTS.
L1
PUMP
CT
Ÿ
Protects pumps from dry-well, dead-
head, jammed impeller, waterlogged
tanks, rapid cycling, under/over voltage,
and over/underload.
Ÿ
Protects pump up to 60 Amp.
Ÿ
Stores faults on memory.
Ÿ
LCD displays: Line voltages, current,
power, failures, time delays, and a setup
menu.
Ÿ
Auto calibration.
Ÿ
Manual or automatic reset.
Features
C
= Contactor
F
= 8 Amp control fuse
CB
= Circuit breaker
A1-A2
= PM-23 normally open contact
L
= Operation indicator lamp
CT
= Current transformer
T1
C1
TC
A2
A1
C2
PUMP
C
C
L1
L2
PUMP-MONITOR
C
C
A1
A2
START
STOP
L1
F
220 VAC
L
L2
CB
CT
Typical Wiring Example
Blue
Black