Xylem MN 414 AC Submersible Pump Motors User Manual
Page 10
2−4 Installation & Operation
MN414
Moisture Protection
The submersible moisture protection system consists of the non−wicking cable cap assembly and the
dual moisture sensing probes. The cable cap assembly prevents moisture from wicking through the cable
assembly even when the cable jacket has been punctured.
Dual moisture sensing probes (Warrick type) extend into the oil chamber located between the tandem
mechanical seals. Should the outer seal fail, water will enter the oil chamber through the labyrinth slinger
paths and create a water/oil emulsion in the oil chamber. The moisture detector control applies 500 volts
to the moisture probes.
The presence of water in the oil chamber increases the conductivity sufficiently to increase current flow
through the probe circuit which illuminates a warning light and activates a relay to de−energize the motor.
The leakage detector control must be purchased separately from
Charles F. Warrick Co. Normandy Ct. Royal Oak, MI 48073 (810) 549−4900.
The leakage detector control system must be connected for the warranty and the U/L listing to be valid.
For information on the relay, see www.gemssensors.com (look for Model 2800/2810 relay).
It’s circuit diagram is shown in Figure 2-3.
Figure 2-3 Moisture Sensing Circuit
1
2
3
4
6
5
7
8
9
10
RE
Motor
W1
W2
Moisture Sensors
Test Resistor
Test
Switch
Test Lamp
AC Line
To
Alarm
500V
Sec.
leakage detector control
not provided
330k
Model 2800/2810
Charles F. Warrick Co.
(810) 549-4900
IMPORTANT:
Failure to properly connect and use this leakage
detector system voids motor warranty.
Control Cable Lead Color
Black
White
Red
Orange
Green
P1
P2
W1
W2
Ground
ORDER BY COMPONENT NUMBER −−−−− *−280O−XXX
AC SUPPLY LINE
VOLTAGE & FREQUENCY
1
115V 50/60 Hz
2
230V 50/60Hz
4
480V 50/60Hz
CONTACT CONFIGURATION
TERMINAL PAIR
3-4
5-6
7 8
A
N.O.
B
N.C.
C
N.O.
N.O.
D
N.C.
N.O.
E
N.C.
N.C.
F
N.O.
N.O.
N.O.
G
N.C.
NO.
N.O.
H
N.C.
N.C.
N.O.
J
N.C.
N.C.
N.C.
N.O.
N.C.
NORMALLY OPEN
NORMALLY CLOSED
NONE PROVIDED
NEMA TYPE ENCLOSURE
1
1
4
2, 4, 6
Line voltage are nominal values
and may range from nominal
minus 15% to nominal plus 10%.
S
S
S
S
S
S
S
S
S
S
S