Maintenance - Pentair U3 K Originalbetriebsanleitung

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 pump-
ing operation. For the same reason, the pump
would not operate if it was switched on before
being submersed.
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 Flutbox) is fitted
in the pressure outlet (U3) or in the attached
elbow (U5). Ensure that the flap opens in the
direction of flow.
14 14
Enlarging the free passage
The free passage of the U5 and U6 pump rang-
es can be enlarged from 10 to 20 mm. This is
done by levering off the foot strainer and at-
taching the enclosed extensions to the inte-
grally molded pump feet. The foot strainer no
longer fits under the pump.

MAINTENANCE

We recommend that you service the equipment
in accordance with EN 12056-4.
Before carrying out any works: dis-
connect the pump and the controls
from the mains and take steps to en-
sure that no one else can reconnect them to
the power supply.
Check the rubber hose for mechani-
cal or chemical damage. A damaged
or kinked hose must be replaced.
Attention! If the water contains high levels of
iron or lime, insufficient cleaning can result in
irreparable 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 opti-
mum performance and operation.