English
Installation and operating instructions Wilo-DrainLift XS-F
25
7.1.2 Inlet ports
The toilet connection (Fig. 4, Pos. 4) takes place directly with the outflow bend of the front
wall installation and an HT bend DN 100, 15 °C, and can be either to the right or the left of
the toilet basin.
CAUTION! Risk of damage!
Incorrect installation can result in damage.
The distance between the middle of the wall-hung toilet and the unit may not be more
than 350 mm, as otherwise malfunctions may occur.
Therefore, do not use an additional connecting pipe between the toilet outflow bend
and the unit.
The middle of the toilet outflow must be 220 mm above the installation level of the
unit.
As well as a wall-hung toilet, the unit can be connected to a washbasin, a shower and a
bidet; other connections are not permitted.
The tank has one port for additional DN 50 HT pipes on each longitudinal side, located
lower down, as well as two ports on the top of the tank.
The elastic connecting sleeves supplied for connecting the outflow pipe simplify installa-
tion and are required for reasons of noise prevention.
The inlet pipes from the shower and washbasin must be fitted with a bend (Fig. 4, Pos. 5)
as close as possible to the unit, if they are connected to the low ports on the longitudinal
sides. This bend must have a height of at least 180 mm between the bottom of the pipe
and the installation level, in order to prevent sewage containing faeces from flowing back
into the inlet pipe.
Installing the lifting unit before covering the frame makes it easier to inspect the connec-
tions.
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.
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. 6: Pressure pipe connection
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 lif-
ting 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).
