Flotec SCM 4 PLUS Manuel D'utilisation Et D'entretien page 10

GB
Before installing the hydraulic unit inside the well, it is necessary to remove all the sand, in accordance with the
ordinary procedures adopted for perforators.
SCM 4 PLUS ® pumps should never be used without pumping liquid, because the bearings are lubricated by the liquid
itself. The pump can suffer severe damage if it is operated in dry conditions, even for short interval of time. The unit
has to be positioned on the bottom of the well and slightly raised by approximately 1-2 m, to prevent the sand
surrounding the motor and the pump and overheating the former and wearing the rotating parts of the latter.
Before lowering the pump into the well, make sure that the supply cable have been correctly tightened to the fittings
on the control panel and that the protection relays are suited to the absorption indicated on the nameplate. At this
point, disconnect the unit and start lowering it into the well. All lowering operations should be performed using
stainless steel or nylon ropes and the slots provided on the head of the pump.
Connect the first pipe section to the drain mouth of the pump after fixing the two halves of the supporting rod to the
end of the pipe. If threaded pipes are provided, apply the threaded sleeve to the upper end to avoid it sliding between
the pipe and the rod. Use a hoist to lower the whole unit into the well. Carefully control the free end of the cable to
prevent it falling into the well. Connect the second section of the pipe, that is coupled to the upper supporting rod,
remove the previous rod and lower the whole unit into the well. Repeat this operation until the desired project depth
has been reached. Take into account that the machine must be positioned at 1-2 m below the dynamic level or, at any
rate, at a depth that meets the pump NPSH. Before positioning the pump, it is necessary to take into account the
lowering of the water level, that can originate from seasonal factors or from an excessive stratum extraction. The well
level should never fall below the suction chamber to avoid gripping the guide bushings and overheating the motor. The
power cable should be fixed with straps every 2-3 m of pipe. Cables should be safely anchored to the riser to prevent
lowering caused by weight. These movements could cause deformations owed to the striking against the walls of the
well and ruptures of the cables.
If the riser is formed by threaded tube sections, it is necessary to tighten the latter to prevent them coming loose due
to the machine reaction torque.
CH. 6 - ELECTRIC CONNECTION
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DANGER
Never use the electric cable to support the electric pump.
Risk of electric
shock
DANGER
Risk of electric
shock
DANGER
Risk of bursting
DANGER
Risk of bursting
WARNING
Ensure tension and frequency of pump (read plate) and
WARNING
power supply are same.
DANGER
Electric shock risk
DANGER
Electric shock risk
Before connecting the power supply cord to the clamps on
WARNING
the command panel, make sure that the cord is able to
withstand the nominal current of the unit.
DANGER
GB
Be careful not to damage the electric cable when lowering
it into the well.
This type of pump can develop high pressure. If a collection
tank or expansion tank 15 is to be installed, it is advisable
to install a pressure limiter valve 16 between the tank and
the pump.
All of the pipes and installation parts must have a maximum
working pressure which is greater or equal to the maximum
pressure of the pump, if this is not possible it is necessary
to use a pressure reducer.
Protect the electric pump and all pipes from freezing.
Installer must make sure that electric current network
has ground wire conforming to current laws.
Make sure that electric current network is provided with a
high-sensitivity circuit breaker , =30 mA (DIN VDE
0100T739)
The power cable must be replaced by qualified personnel
only.
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