Flotec SCM 4 PLUS Bedienungs- Und Wartungsanleitung Seite 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
8
DANGER
Never use the electric cable to support the electric pump.
Risk of electric
shock
DANGER
Be careful not to damage the electric cable when lowering it into the well.
Risk of electric
shock
This type of pump can develop high pressure. If a collection tank or
DANGER
expansion tank 15 is to be installed, it is advisable to install a pressure
Risk of bursting
limiter valve 16 between the tank and the pump.
All of the pipes and installation parts must have a maximum working
DANGER
pressure which is greater or equal to the maximum pressure of the pump,
Risk of bursting
if this is not possible it is necessary to use a pressure reducer.
WARNING Protect the electric pump and all pipes from freezing.
WARNING Pollution of the liquid could occur due to the leakage of lubricants
WARNING
DANGER
Electric shock risk
DANGER
Electric shock risk
WARNING
DANGER
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 D =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.
The power cable must be replaced by qualified personnel
only.
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GB