Pentair U3 K Instructions De Service page 14

ENGLISH
Mobile operation
For safety reasons, mobile operation is only al-
lowed with a foot strainer.
If a hose is used as a pressure line, care must
be taken to ensure that for every pumping op-
eration the hose is completely empty before the
pump is submersed. Any residual liquid would
obstruct the ventilation of the pump housing
and therefore also hinder the pumping opera-
tion. For the same reason, the pump would not
operate if it was switched on before being sub-
mersed.
The pump can also be vented by providing a 6
mm drill-hole in the pump housing. This drill-
hole allows the pump to be vented even if the
rubber flap is used.
The enclosed rubber flap (not Flutboxand U6)
is fitted in the pressure outlet (U3) or in the at-
tached elbow (U5). Ensure that the flap opens in
the direction of flow.
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Enlarging the free passage
The free passage of the U5 and U6 pump ranges
can be enlarged from 10 to 20 mm. This is done
by levering off the foot strainer and attaching
the enclosed extensions to the integrally mold-
ed pump feet. The foot strainer no longer fits
under the pump.
MAINTENANCE
Maintenance and inspection of this product
must be carried out in accordance with EN
12056-4.
WARNING!
Before carrying out any works: disconnect the
pump and the controls from the mains and take
steps to ensure that no one else can reconnect
them to the power supply.
WARNING!
Check the mains cable for signs of mechanical
and chemical damage. Damaged or kinked ca-
bles must be replaced by the manufacturer.
NOTICE! If the water contains high levels of iron
or lime, insufficient cleaning can result in irre-
parable damage to the seal and thus also to the
pump motor in the long term.
Consequently, the pump must be cleaned at
regular intervals according to the hardness of
the water.
Cleaning
The foot strainer prevents coarse impurities
from entering the pump. Regular cleaning of the
float and the foot strainer ensures optimum per-
formance and operation.