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Pump Location; Setting Of Level Switch; Start-Up - Grundfos Unilift AP series Montage- Und Betriebsanleitung

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  • DEUTSCH, seite 32

5.2 Pump location

The pump can be used in vertical or horizontal
position with the discharge port as the highest point
of the pump, see fig. 3.
During operation, the suction 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.
Do not lift the pump by means of the
Caution
electric cable.
Position the pump so that the suction 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.
It is recommended to place the pump on a solid
base, see fig. 4.
The pump must not be installed hanging from the
discharge pipe.
Fig. 4
8

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 suction strainer to
prevent the pump from taking in air.
Fig. 5
Fig. 6

6. Start-up

Before starting the pump, check that
the suction strainer is fitted to the
Caution
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

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Diese Anleitung auch für:

Unilift ap50

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