2
4
5
7
10
15
20
25
30
40
m
3
/h
m
3
/h
m
3
/h
m
3
/h
m
3
/h
m
3
/h
m
3
/h
m
3
/h
m
3
/h
m
3
/h
102
103
115
160
195
240
285
320
350
410
mm
mm
mm
mm
mm
mm
mm
mm
mm
mm
The Pump cannot operate “dry” without water. “Dry”
operation can lead to device damage. In such a case,
only paid repair is available.
In order to avoid potential dry operation, the pump must be
installed at such a depth so that the lowest, dynamic mirror level
(the mirror level set at the time of constant pumping with slow
inflow) was at least 2 m above the discharge port.
If the well efficiency disables such installation (the well is not efficient enough in relation to pump
efficiency), then you can choose one of the following solutions:
-
install a valve on the pumping pipeline that will constantly limit the flow,
-
install a security device protecting against dry operation, monitoring the water mirror
level which in case of dry operation hazard will switch off power supply to the
aggregate.
The use of the pump in a well with wider diameter than
shown in the table can result in motor overheating and its
failure. If the well in which the pump is to operate has
wider diameter than specified in the table, the pump must
be installed in a special jacket forcing the proper cooling.
In pic. the idea of such a jacket is presented.
The pump must be installed in the well section above the
filter. The minimal distance between the upper edge of
the top part of the well filter and the bottom edge of the
motor cannot be smaller than 30 cm. The use of the
pump installed nearer to the bottom can result in sand
suction which, in turn, can lead to faster wear and tear of
pumping elements. If the pump is placed in sludge, it can
result in motor overheating.
When lowering the pump into the well, attention must be paid that the supply cable of
the pump is fixed to the supply pipe with plastic bands in spans not exceeding 2 m.
In case of significant depth of pump installation, the cable which is not attached to the
delivery pipeline can, due to its weight, be broken.
It is also recommended that the pump is suspended on a steel line so that if the
delivery pipeline gets unscrewed, the aggregate does not sink in the well.
The check valve protecting the device against impacts of returning water must be
installed directly above the pump.
The pump motor is filled with ecological oil. In case of motor failure, the oil can leak into
the well.
3
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