NOCCHI K Série 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.
K-SERIES, SCM 4 PLUS
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
Electric connections must be carried out by skilled staff only, in accordance with the manufacturer's instructions
enclosed to the electric equipment and the motor. It is advisable to install a protection device upstream, of adequate
dimensions (in accordance with the current values indicated on the nameplate) to prevent voltage peaks and overloads.
Cables should be selected in function of the absorption in Ampere, indicated on the nameplate. Cables should be
dimensioned in accordance to the power to transmit, of the distance from the control page and the starting system of
the submersed motor. Cables should guarantee a submersed operation, have waterproof joints and show no signs of
abrasions or holes.
The control board should be equipped with all the protection devices and equipment to manage and drive the hydraulic
unit. More specifically, it is necessary to guarantee a protection against overcurrent and short circuits. Protections
against the loss of phases, the lowering of voltage and the lack of water in the well are recommended but not compulsory.
8
, SCM 4 HF and SA 6 pumps should never be used without pumping liquid, because the
®
WARNING
DANGER
Electric shock
risk
DANGER
Electric shock
risk
WARNING
Ensure tension and frequency of pump (read plate) and
power supply are same.
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)
Before connecting the power supply cord to the clamps
on the command panel, make sure that the cord is able
to withstand the nominal current of the unit.