Starting The Unit - Pentair NOCCHI SCM 4 PLUS 40 Manual De Instrucciones

CHAPTER 7

STARTING THE UNIT

WARNING
Use the hydraulic unit within the operating limits indicated on the nameplate or the datasheet.
WARNING
Never run the pump in dry conditions, even for short intervals of time.
WARNING
Do not run the pump with the interception valve on delivery completely closed.
WARNING
Do not run the pump in the opposite direction for more than 30 seconds.
WARNING
Complete all the electric and mechanic connections before starting the pump.
• Before lowering the pump into the
well it is necessary to control the
direction of rotation of the motor to
avoid damaging the thrust bearing
• If the direction of rotation is correct,
the hydraulic performances of the
pump are compliant with those
indicated in the catalogue
• To perform this check it is necessary
to start the pump with a partially
opened gate
• When the water starts flowing in,
further close the gate and verify that
the pressure value is above the one
indicated on the nameplate. If this
not occurs, the motor is rotated in the
opposed direction
Before starting the pump is final mode, check:
• The continuity of the electric circuit
to make sure that no damages have
occurred during the lowering in the
well - the insulation resistance to
ground, that is the related value
between the cable terminals and the
drainage pipe
• To resume the correct direction of
rotation, invert the two phases on the
control panel
• The motor of the pump should not
rotate in the opposite direction for
above 30 seconds
• After verifying the direction of
rotation, allow the pump to run
reducing the opening of the valve to
about half the maximum opening, for
about one minute
• Stop the pump to remove gas pockets
from the hydraulic unit, since their
presence could prevent the correct
lubrication of the shaft
• This interval should always be below
5 minutes
• The performances of the pump, that
should always be within the operating
range
• The value of the current supplied to
the control board, that should always
be below the one indicated on the
motor nameplate
• After performing this operation,
restart the machine by gradually
opening the delivery valve until all
the sand has been removed or has
reached minimum levels (40 g/m3)
• If the well has been built and drained
correctly, this operation can be
performed in about 20 minutes
• After the completion of this phase,
it is possible to connect the delivery
hose of the pump
• If necessary, partially open the gate
or adjust the pressure switches. If
abnormal operating conditions are
reported during the start-up phase,
stop the machine, establish the cause
and remove the pump from the well,
if necessary
GB
13