Level Measurement - Wilo DrainLift WS 40E Basic Notice De Montage Et De Mise En Service

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6.4.12 Backfill the pit
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Fig. 13: Backfill the pit
6.4.13 Check the pump is properly fitted.
6.4.14 Install the level control device
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Installation and electrical connection
chamber.
- Screw in the enclosed wood screw as far as it will go.
▶ Pump chamber extension installed. Next step: Backfill the pit.
Observe the following points when backfilling the pit:
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Make sure that the pump chamber is in a consistent and vertical position.
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Backfill and compress the pump chamber and pump chamber extension by hand
(vane, hand rammer).
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Secure pump chamber against buoyancy. If necessary, fill the pump chamber with
water.
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The details of the filling material are minimum requirements. Check and comply with
local regulations.
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Backfill and compress the pipes according to local regulations.
1 Underlay
4
2 Levelling layer
3 Compression layers
4 Substructure to the surface level
5 Chamber cover
3
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Pump chamber is vertical.
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The chamber base is completely embedded in the levelling layer.
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All pipe adaptors are connected and sealed.
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Pump chamber extension installed.
2
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Filling material available:
1
Non-cohesive material (sand or gravel) without sharp-edged components, grain
size 0 – 32 mm)
1. Backfill the pit in layers all around at the same height. Max. layer thickness:
300 mm (12 in). Compress the individual layers properly (Dpr. 97 %).
NOTICE! The compression layers must extend to the chamber neck!
2. Align the surface level with the chamber cover using the substructure.
NOTICE! If the surrounding grown soil consists of cohesive material, the sub-
structure can be made with this material. Max. grain size: 20 mm!
▶ The pit is backfilled. Next step: Install the pump.
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The pit is backfilled.
1. Pump any existing water out of the pump chamber.
2. Remove coarse contaminants in the pump chamber.
3. Check the pump is properly fitted:
- Discharge pipe vertical
- Screwed connection on the shut-off ball valve tight.
▶ Proper fit of the pump checked. Next step: Install the level control device.
The level is measured in the following ways:

Level measurement

Pump ON/OFF
Float switch on the pump
Separate float switch
Level sensor
High water alarm
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WILO SE 05