Wilo DrainLift WS 50 Basic Einbau- Und Betriebsanleitung Seite 52

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Fig. 5: Excavating the pit
6.4.6 Connecting the pressure pipe
Installation and operating instructions Wilo-DrainLift WS 40/50 Basic
Installation and electrical connection
▶ Pump chamber installed so as to protect against buoyancy and twisting. Next step:
Connect the pressure pipe.
Ground installation
1 Ground
2 Underlay
3 Levelling layer
4 Min. pit diameter
5 Min. pit depth
To install the pump chamber, excavate the pit, taking into account the following points:
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Observe local regulations for earthworks in underground construction.
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(Slope angle, pit lining etc.)
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Min. pit depth
Chamber height + 300 mm (12 in) underlay + 200 mm (8 in) levelling layer + height
of chamber cover
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Pit diameter
Min. pit diameter at ground level 2 m (6.5 ft) larger than chamber diameter.
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Position of the inlet, pressure and venting line
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Pump chamber extension (300 mm/12 in) for height compensation to the surface
level.
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Ground water
Pump out any groundwater with a ground water lowering system.
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Consider local frost depths.
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Preparatory tasks completed.
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Pit dimensions specified.
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Prepare the on-site piping.
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Height adjustment available.
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Ground water lowering system installed.
1. Excavate the pit.
2. Install the load-bearing mineral mixture underlay properly and seal it (Dpr 97 %).
3. Add a levelling layer of sand (non-cohesive, grain size 0...32 mm) and level off.
4. Insert the pump chamber into the pit.
5. Align the pump chamber with the on-site piping.
6. Vibrate the pump chamber evenly into the levelling layer.
NOTICE! Vibrate the chamber base and base ribs completely into the levelling
layer!
7. Check the position of the pump chamber and correct if necessary:
- Pump chamber vertical
- Chamber cover flat to surface level
▶ Pump chamber installed. Next step: Connect the pressure pipe.
DrainLift WS 40E/50E Basic
Fig. 6: Pressure connection
DrainLift WS 40D/50D Basic
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