Pump Operation - Pentair AURORA 3801 Installation And Operation Manual

PUMP OPERATION

DISCHARGE
DISCHARGE
Figure 31
Air pocket in elbow
Air pocket in elbow
Air pocket in horizontal suction piping
In suction lift applications, the suction pipe in the liquid well must be
Air pocket in horizontal suction piping
sufficiently submerged to prevent exposure of the end of the pipe when
the well is at its minimum level and to prevent vortex action (whirlpool
effect) of the liquid at the suction pipe, which will draw air into the pipe.
Also, care should be taken to keep the suction pipe located away from
the well inlet since the incoming liquid may be carrying air bubbles.
Another cause of air in the liquid is dropping of the liquid from too high a
point into the well. See Figure 32 shown above.
Electrical Wiring
Normally, your pump will be supplied with an attached drive motor. The
motor should be wired in accordance with the wiring diagram found on
the motor nameplate. Be sure the voltage, frequency, and phase of your
power supply corresponds with the nameplate data. It is recommended
to provide a separate switch and overload protection for your pump
motor to protect against power failure in some other area. Conversely,
if the pump motor develops electrical problems, it will be isolated from
other equipment.
Notice: PRESTARTING INSTRUCTION: The coupling halves should
be connected. Prior to connection, however, the drive motor should
be started to make sure the direction of rotation is the same as the
direction indicated by the arrow on the pump casing.
A-03-327 (09/27/19)
AIR POCKET
SUCTION
INCORRECT
DECREASER
ELBOW
SUCTION ELBOW
CORRECT
ECCENTRIC TAPER
REDUCER
Figure 31
AIR POCKET
INCORRECT
CORRECT
Figure 32
Figure 32
COMMISSIONING, START-UP, OPERATION, AND SHUTDOWN
Lubrication
In dry locations, each bearing will need lubrication at least after every
4,000 hours of running time or 6 to 12 months, whichever is more
frequent. In wet locations (exposed to dripping water, to the weather
or to heavy condensation found in unheated or poorly ventilated
underground locations) every 2,000 hours or every 3 to 6 months,
whichever is more frequent. Applicable to 3804 series pumps.
• Use Chevron® SRI Grease NLGI grade 2.
Before running the driver, either separately or connected
to the pump, check lubrication and cooling requirements.
Proper lubrication is critical for trouble-free, long-term
operation of the equipment. Lubrication methods and frequency vary
with bearing type, application, environment, and the unique operating
characteristics of the individual piece of equipment. Ensure lubrication
is present and lubrication systems are connected and operational per
instructions.
Rotation
Pump rotation is clockwise when viewed from the back of the motor.
An arrow is also located on the pump casing to show the direction of
rotation.
It is absolutely essential that the rotation of the motor be checked
before connecting the shaft coupling. Incorrect rotation of the pump,
for even a short time, can dislodge and damage the impeller, casing,
shaft, and shaft seal.
Guarding
All guards must be in place and secure per the instructions prior to
start-up.
Guards must not be removed while the pump is
operational. Always follow lock out – tag out procedures when working
on equipment that may turn on.
START-UP CONSIDERATIONS
System Flushing
When the pump is installed in the completed piping system, it is
recommended that the system be flushed to remove debris such
as stubs of welding rod, welding slag, and loose scale. The pump
manufacturer should be consulted as to the suitability of any chemical
flush additives added to the system.
Priming and Filling
The pump should not run unless it is completely filled with liquid as
there is danger of damaging some of the pump components. This
includes short runs for rotation verification. The pump will not operate
satisfactorily until it is primed. All air must be expelled from the suction
piping and pump casing, and replaced by the liquid to be pumped. There
are several methods of priming pumps. The one you select will depend
on your specific requirements.
Flooded Suction Priming
This method of priming a pump is relatively simple. The liquid source
is located above the pump, and all that is necessary to prime the pump
is to open the air vent valve or plug in the pump casing, and to crack the
gate valve in the suction line. The suction line and pump should be filled
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