Wilo DrainLift M2/8 Notice De Montage Et De Mise En Service page 32

English
Fig. 9: Installation of inlet pipe (DNb50) at a low inlet position
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Another inlet (DNb50) can be installed at the connection point for the diaphragm hand
pump.
7.3.3 Ventilation (DNb70)
In accordance with EN 12050-1, the unit must be connected to a venting line, which vents
via the roof, and is absolutely necessary for the unit to function perfectly. The connection
is made on one of the two combination connecting pieces (DNb50/DNb70) to the tank roof
using the enclosed Konfix connector. For this, the bottom of the connecting piece (DNb70)
is sawed off about 15 mm above the lip (see Fig. 8). Remove burrs and any excess material.
Push the Konfix connector up to the inner collar and fasten with the enclosed hose clip.
Afterwards, open by pulling off the tag and pushing in the venting pipe with some lubri-
cant. Secure the venting pipe against slipping out using clamps, and always install with a
downward incline toward the unit.
7.3.4 Emergency drain connection (diaphragm hand pump)
Fundamentally, it is recommended to install a diaphragm hand pump (accessory) for drai-
ning the tank in an emergency. The suction line for the diaphragm hand pump (outer dia-
meter 50 mm) is connected in the recess (Ø 65 mm) at the pump level of the tank (Fig.b10).
To establish the connection to the tank, see 7.3.4 Connec-
tion of an emergency disposal (Fig. 10).
Secure the inlet pipe using clamps so that it can't slip out of
the tank opening (Fig. 9).
WILO SE 02/2011