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Pump Location; Setting Of Level Switch; Startup - Grundfos Unilift AP12 Installatie- En Bedieningsinstructies

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  • DUTCH, pagina 83

5.2 Pump location

The pump can be used in vertical or horizontal
position with the outlet as the highest point of the
pump. See fig. 3.
During operation, the inlet strainer must always be
completely covered by the pumped liquid.
Fig. 3
When the pipe/hose has been connected, place the
pump in its operating position.
Never lift the pump by the power
Caution
supply cable.
Position the pump so that the inlet strainer will not be
blocked or partly blocked by sludge, mud or similar
materials.
In the case of permanent installation, the pit must be
cleared of sludge, pebbles, etc. before the pump is
installed.
We recommend that you place the pump on a solid
base. See fig. 4.
The pump must not be installed hanging from the
outlet pipe.
Fig. 4
Pumpland.ru

5.3 Setting of level switch

For pumps supplied with a level switch, the
difference in level between start and stop can be set
by adjusting the free cable between the level switch
and the pump handle.
The longer the length of free cable, the larger the
difference in level between start and stop.
Maximum length of free cable: 350 mm. See fig. 5.
Minimum length of free cable: 100 mm. See fig. 6.
The stop level must be above the inlet strainer to
prevent the pump from taking in air.
Fig. 5
Fig. 6

6. Startup

Before starting the pump, check that
Caution
the inlet strainer is fitted to the pump
and submerged in the pumped liquid.
Open the isolating valve, if fitted, and check the level
switch setting.
The pump may be run briefly to check
Note
the direction of rotation without being
submerged in the pumped liquid.
Max. 350 mm
Start
450 mm
Stop
100 mm
Min. 100 mm
Start
200 mm
Stop
300 mm
7

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