Connecting The Pipes - Wilo DrainLift M2/8 Notice De Montage Et De Mise En Service

Fig. 3: Attachment of the sound absorption strips
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Fig. 4: Buoyancy safeguard
ca.49,5
ca.774
Installation and operating instructions Wilo-DrainLift M2/8
• The placement of any existing or still-to-be installed inlet, pressure and vent lines is to be
checked with regard to connection options to the unit.
• Observe the installation and operating instructions for the accessories!
7.2 Installation
Place the unit on a flat solid floor and align.
In accordance with ENb12056-4, sewage lifting units must be installed so that they cannot
twist and turn.
Units which threaten to float must be installed so that they are anti-buoyant.

7.3 Connecting the pipes

All pipes must be installed so that they are stress-free, noise-insulated and flexible. No
pipeline forces or torques may act on the unit. The pipes (incl. valves) are to be fastened
and supported such that neither tensile nor compressive forces act on the unit.
All line connections must be made with care. Carefully tighten any connections with hose
clips (starting torque 5 Nm!).
Do not reduce the pipe diameter in the direction of flow.
In the inlet pipe in front of the tank as well as after the non-return valve, a gate valve is
always necessary in accordance with ENb12056-4. (Fig. 11).
7.3.1 Pressure pipeline
CAUTION! Risk of damage!
Occurring pressure surges (e.g. when closing the non-return valve) can sometimes be
several times more than the pump pressure, depending on the operating conditions
(to avoid this, see also sect. 8.2.2 "Setting the pump run time").
• Therefore, in addition to the corresponding pressure resistance, also pay attention to
the longitudinal force fit connection elements of the pipe!
• The pressure pipeline with all installed parts must reliably withstand the occurring ope-
rating pressures.
To protect against any backflow out of the main public sewer, the pressure pipeline is to
be designed as a "pipe loop", the bottom edge of which must lie at the highest point above
the locally defined backflow level (usually at street level). (see also Fig. 11).
The pressure pipeline is to be installed so that it is frost-proof.
Mount the gate valve (DN 80) to the pressure connection of the unit (available as an acces-
sory, nuts, washers, flat gasket included). Support the weight of the valves!
For the sound-insulating installation of the unit, stick the
enclosed sound absorption strips in the recesses in the tank
floor provided for this purpose (see Fig. 3, itemb1).
Fix the unit to the floor with the enclosed fixation material
(Fig. 4).
• Mark the position of the drilled holes on the floor for fas-
tening in the slots on the side of the tank
• Drill holes in the floor
• Properly fix the unit to the floor with dowels and screws
English
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