Wilo DrainLift BOX, Installation And Operating Instructions Manual

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42 Installation and operating instructions • Wilo-DrainLift BOX • Ed.06/2022-10
6.4.3.3 Installing the lifting unit (under the
floor)
1
2
3
4
5
Fig. 11: Lifting unit installation
1 Ground
2 Underlay
3 Levelling layer
4 Filling material
5 Mains connection, version without switchgear
✓ Lifting unit prepared for installation.
✓ Two persons present.
✓ Required installation material:
2x coupling sleeves for DN 100 connection ports.
1x hose section with 2x pipe clamps (included in scope of delivery).
1x anti-syphon trap for cable entry
Filling material: Sand/gravel without sharp edges, grain size 0 – 32 mm (0 – 1¼ in)
1. Place coupling sleeves on the inlet pipe and the ventilation/cable duct.
2. Lift the lifting unit with the DN 100 connection ports and lower it into the pit.
3. Align the connection ports with the pipes.
4. Bed the lifting unit into the levelling layer.
5. Coil the connection cables and attach them to the discharge pipe with a cable tie.
NOTICE! To allow the pumps or float switches to be lifted out of the tank as required,
a cable loop (approx. 1 m/3 ft) must remain in the chamber!
CAUTION! The connection cables must not impede the movement of the float switch!
If the float switch cannot move freely, this may cause the system to malfunction.
6. All connection cables (for pumps and float switches) should be led outside via the vent-
ilation pipe using a drawing wire.
NOTICE! Install an anti-syphon trap at the transition in the operating space!
7. Slide the coupling sleeves over the DN 100 connection ports to make the inlet and vent-
ilation connections.
8. Place the hose section on the discharge connection.
9. 1. Attach pipe clamp and affix the hose section to the discharge connection. CAU-
TION! Max. tightening torque: 5 Nm (3.7 ft·lb)!
10. 2. Attach pipe clamp.
11. Place the hose section on the discharge pipe and affix hose section to the on-site dis-
charge pipe using the second pipe clamp. CAUTION! Max. tightening torque: 5 Nm
(3.7 ft·lb)!
NOTICE! To prevent a backflow from the main public sewer, the discharge pipeline
must be installed as a “pipe loop”. The bottom edge of the pipe loop must be above
the locally defined backflow level (usually street level) at its highest point!
12. Perform a leak test in accordance with the applicable regulations.
13. Fill the pit a layer at a time (layer thickness max. 200 mm/8 in) with filling material all the
way around to an even height, up to the bottom of the sealing bead and compact prop-
erly (Dpr. 97%).
While filling, ensure that the lifting unit remains vertical and stable and watch out for
deformation of the tank. Compact by hand directly by the tank wall (shovel, hand ram-
mer).
▶ The lifting unit is now installed properly.