4
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.
When lowering the pump into the well make sure that the feed
cable of the pump is in at least 2m mounted to the delivery pipe with
plastic bands. At a great depth where the pump is installed the cable which is not
mounted to the delivery pipe may break reason high weight of cable.
I It is recommended to lift the pump additionally at a steel line so that in
case of self-rewinding of the delivery pipeline the unit does not sink in
the well.
Right over the pump install a non-return valve to protect the equipment
against the impact of the returning water. The non-return valve installed on
the pump is an auxiliary valve, it may not be treated as the main valve.
The pump’s motor is filled with an environment-friendly oil. In case of a
motor breakdown the oil might be released to the well.
Before lowering the pump into a new well, the user should make sure
whether the drilling company which executed the well has cleaned it by
pumping the water out. When executing the well the water inside the protective
pipe and inside the filter is contaminated with sludge and sand.
Pumping the water containing sand reduces significantly the lifecycle of deep-well
pumps.
When setting the pressure switch and choosing the capacity o
of pressure vessel it is necessary to comply with the rule that
the pump motor may not switch on more often than 30 times
per hour. More frequent switching on might overload and damage the
motor.
