6
C-4) Electrical Connections:
C-4.1) Power Cable:
The cord assembly mounted to the pump must not be modifi ed
in any way except for shortening to a specifi c 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 modifi ed
in any way except for shortening to a specifi c 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 (Optional)
- 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 rectifi ed
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 effect of temperature
and current. This means that the overload protector will trip out
and shut the pump off 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 rectifi ed
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-4.4) Wire Size:
Consult a qualifi ed 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 identifi cation plate to the
available power.
D-2) Check Pump Rotation:
Before putting pump into service for the fi 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) Identifi cation Plate:
Record the numbers from the pump identifi cation plate for
future reference.
D-3.1) 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-3.2) 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 fi 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.
SECTION E: PREVENTATIVE MAINTENANCE
As the motor is oil fi lled, no lubrication or other maintenance
is required, and generally Barnes Pumps will give very
reliable service and can be expected to operate for years on
normal sewage pumping without failing. However as with any
mechanical piece of equipment a preventive maintenance
program is recommended and suggested to include the
following checks:
