TEMPERATURE SENSOR ELECTRICAL
RATINGS
Volts
Continuous
Amperes
Inrush
Amperes
220-240
1.50
15.0
440-480
0.75
7.5
Overload Protection:
Three Phase -
The Normally Closed
(N/C) thermal sensor is embedded in
the motor windings and will detect
excessive heat in the event an
overload condition occurs. The
thermal sensor will trip when the
windings become too hot and will
automatically reset when the pump
motor cools to a safe temperature. It
is recommended that the thermal
sensor be connected in series to an
alarm device to alert the operator of
an overload condition, and/or the
motor starter coil to stop the pump.
In the event of an overload, the
source of this condition should be
determined and repaired.
These situations ma
a false
y induce
signal in the moisture etecting
d
circuit. If none of the above test
prove conclusive, the pump(s) should
be pulled and the source of the
failure repaired.
IF A MOISTURE
DETECT
HAS
OCCURRED
MAINTENANCE
SHOULD
BE
PERFORMED
AS
SOON
AS
POSSIBLE!
If current through the temperature
sensor exceeds the values listed, an
intermediate control circuit relay
must be used to reduce the current
or the sensor will not work properly.
Wire Size:
If longer power cable is required
c
a qualified electrician for
onsult
proper wire size.
DO NOT ALLOW THE
PUMP TO CYCLE OR RUN IF AN
OVERLOAD CONDITION OCCURS.
WARNING
Pre-Operation
1.
C
heck Voltage and Phase -
Compare the voltage and phase
information stamped on the
pump name plate.
2.
Check
Pump Rotation -
Improper
motor rotation can result in poor
pump performance and can
damage the motor and/or pump.
Check rotation on three phase
units by momentarily applying
power and observe the "kickback".
Kickback should always be in a
counter-clockwise
direction
as
viewed from motor end or opposite
to impeller rotation. Impeller rotation
is counter-clockwise as viewed from
bottom of pump.
3.
N
ame Plate -
Record the
information from the pump name
plate to drawing in front of manual
for future reference.
4.
I
nsulation Test -
An insulation
(megger) test should be performed
on the motor. Before the pump is put
into service. The resistance values
(ohms) as well as the voltage (volts)
and current (amps) should be
recorded.
5.
P
ump-Down Test -
Be sure pump
has been properly wired, lowered
into the basin, sump or lift station,
check the system by filling with liquid
and allowing the pump to operate
through its pumping cycle. The time
needed to empty the system, or
pump-down time along with the
volume of water, should be recorded.
04
Installation & Service
Moisture Sensors -
A normally open
(N/O) sensor rated of 1 watt @330K
ohms, 500 volt, is installed in the
p
ump seal chamber which will detect
any
moisture
present.
It
is
r
ecommended that this detector be
wired in series to an alarm device or
motor starter coil to alert the
operator that a moisture detect has
occurred. In the event of a moisture
detect, check the individual moisture
sensor probe leads for continuity, (∞
resistance = no moisture) and the
junction
ox/control
box
for
b
moisture content.
No lubrication or maintenance is
required. Perform the following
checks when pump is removed from
operation
or
when
pump
performance deteriorates:
a) I
nspect motor chamber for oil
level and contamination.
b)
I
nspect impeller and body for
excessive build-up or clogging.
c) I
nspect motor, bearings and shaft
seal for wear or leakage.
Maintenance
NOTE: Item numbers in ( ) refer to
Figure 3.
Servicing
Impeller and Volute
Disassembly -
To
Disconnect power.
clean out the pump body (12), clean
out or replace impeller (7), or replace
wear ring (13), remove hex nuts (2)
and vertically lift motor assembly
from the pump body (12), and then
lift out back plate (4).
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