Wilo DrainLift XS-F Einbau- Und Betriebsanleitung Seite 33

7.1.3 Pressure pipe
The on-site pressure pipe (Fig. 4, Pos. 1) DN 25 or DN 32 (minimum clear diameter 28 mm) is
connected via an S-shaped discharge elbow to the pressure outlet of the unit. The waste water
pressure pipes may be made of PVC, PP or PE-HD.
Fig. 6: Pressure pipe connection
7.1.4 Tank ventilation
CAUTION! Risk of damage!
Incorrect installation can result in damage.
Improperly installed tank ventilation can cause malfunctions.
The tank must be ventilated in order for the unit to work properly.
Fig. 7: Tank ventilation
The pressure pipe should be laid without a
fall. If laying it with a fall to the transfer
point is unavoidable, a wider pipe should
be laid from the highest point in order to
prevent a lifting effect and associated
malfunctions (Fig. 4, Pos. 2 and Fig. 6-3).
Fasten the 1 ¼" non-return valve with a
40 x 1 ¼" adapter directly to the S-
shaped pressure pipe elbow, so that the
water flowing back after the pump is
switched off is reduced to a minimum
and the valve can be easily accessed
through the inspection opening during
maintenance (Fig. 6-1).
The ventilation insert can be positioned as in
Fig. 4, Pos. 3 and Fig. 7. The filter insert can
also be fed upwards or sideways through the
front wall.
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