IBO 2” STING Betriebsanleitung Seite 19

electric shock to the operator.
Since the motor needs cooling during operation, the diameter of the
borehole where the pump is working may not be greater than the value
given below in the table of diameters. The values are given in mm. These diameters
capacity of a given pump and dimension of pump.
Type of pump
76mm size 101mm
109
90mm size
mm
114
98mm size
mm
Using the pump in a well of a diameter greater than the
one given in the table might overheat and damage the
motor. If the diameter of the well where the pump is to be working is
greater than the diameter given in the table, the pump must be
installed in a special coat which enforces proper cooling. The
concept of the coat has been shown in the figure.
The pump must be installed above the filter of the well.
The minimal
distance between the upper edge of the last part of the filter
and the lower
edge of the motor may not be less than 30 cm.
The pump may not dry run, without water. Dry run damages the
equipment. In this case the repair may be performed only against payment.
To prevent potential dry run the pump must be installed at such depth so that the
lowest dynamic level of the water (water level established during continuous pumping
at free outflow) is at least 2 m above the liquid feed port of the pump.
If the efficiency of the well prevents such assembly (the well is not as efficient as the
pump) then choose an option from the following:
install smaller pump
-
install a valve for constant reduction of the flow on the delivery pipeline,
-
- install a safety device against dry run to control the level of water table and in
case of dry run to cut off the power supply to the unit.
Lowering the pump in the borehole with a protective strip may
damage the cable insulation. This may damage the pump or cause
depend on the working
121 138
mm mm
128 144
mm mm
132 148 162
mm mm mm
Working capacity
175 199 230
mm mm mm
274 312 345
mm mm mm
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