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C-4) Electrical Connections:
C-4.1) Power Cable:
The cord assembly mounted to the pump must not be modied
in any way except for shortening to a specic application.
Any splice between the pump and the control panel must be
made in accordance with all applicable electric codes. It is
recommended that a junction box, if used, be mounted outside
the sump or be of at least NEMA 4 (EEMAC-4) construction if
located within the wet well. Do not use the power cable to lift
pump. NOTE: THE WHITE WIRE IS NOT A NEUTRAL OR
GROUND LEAD, BUT A POWER CARRYING CONDUCTOR.
C-4.2) Control Cable:
The cord assembly mounted to the pump must not be modied
in any way except for shortening to a specic application.
Any splice between the pump and the control panel must be
made in accordance with all applicable electric codes. It is
recommended that a junction box, if used, be mounted outside
the sump or be of at least NEMA 4 (EEMAC-4) construction if
located within the wet well. Do not use the control cable to lift
pump. NOTE: THE WHITE WIRE IS NOT A NEUTRAL OR
GROUND LEAD, BUT A POWER CARRYING CONDUCTOR.
C-4.3) Overload Protection:
C-4.3-1) 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 itself 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 rectied immediately. DO
NOT LET THE PUMP CYCLE OR RUN IF AN OVERLOAD
CONDITION OCCURS !
C-4.3-2) Single Phase - The type of in-winding overload
protector used is referred to as an inherent overheating
protector and operates on the combined eect of temperature
and current. This means that the overload protector will trip out
and shut the pump o if the windings become too hot, or the
load current passing through them becomes too high. It will
then automatically reset and start the pump up after the motor
cools to a safe temperature. In the event of an overload, the
source of this condition should be determined and rectied
immediately. DO NOT LET THE PUMP CYCLE OR RUN IF
AN OVERLOAD CONDITION OCCURS !
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.
TEMPERATURE SENSOR ELECTRICAL RATINGS
Volts Continuous
Amperes
Inrush
Amperes
220-240 1.50 15.0
440-480 0.75 7.5
575-600 0.60 6.0
C-4.3-3) Moisture Sensors:
A normally open (N/O) detector is installed in the pump
seal chamber which will detect any moisture present. It is
recommended that this detector be connected in series to an
alarm device or the motor started 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 box/control box
for moisture content. The above situations may induce a false
signal in the moisture detecting circuit. If none of the above
tests prove conclusive, the pump(s) should be pulled and the
source of the failure identied and repaired. IF A MOISTURE
DETECT HAS OCCURRED SCHEDULE MAINTENANCE AS
SOON AS POSSIBLE.
C-4.4) Wire Size:
Consult a qualied electrician for proper wire size if additional
power cable length is required. See table for electrical
information.
SECTION: D START-UP OPERATION
D-1) Check Voltage and Phase:
Before operating pump, compare the voltage and phase
information stamped on the pump identication plate to the
available power.
D-2) Check Pump Rotation:
Before putting pump into service for the rst time, the motor
rotation must be checked. Improper motor rotation can result
in poor pump performance and can damage the motor and/
or pump. To check the rotation, suspend the pump freely,
momentarily apply power and observe the “kickback”.
“Kickback” should always be in a counter-clockwise direction
as viewed from the top of the pump motor housing.
D-2.1) Incorrect Rotation for Three-Phase Pumps:
In the event that the rotation is incorrect for a three-phase
installation, interchange any two power cable leads at the
control box. DO NOT change leads in the cable housing in the
motor. Recheck the “kickback” rotation again by momentarily
applying power.
D-2.2) Incorrect Rotation for Single-Phase Pumps:
In the unlikely event that the rotation is incorrect for a single
phase pump, contact a Barnes Service Center.
D-3.1) Identication Plate:
Record the numbers from the pump identication plate for
future reference.
D-3.2) Insulation Test:
Before the pump is put into service, an insulation (megger)
test should be performed on the motor. The resistance values
(ohms) as well as the voltage (volts) and current (amps) should
be recorded.
D-3.3) Pump-Down Test:
After the pump has been properly wired and lowered into the
basin, sump or lift station, it is advisable to check the system
by lling 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.
