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Installation and operating instructions Wilo-DrainLift XXL
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7.3.2 Tank connection piece
Prepare the tank connecting pieces to be connected according to Fig. 6.
DN 100/DN 150 inlet
Connect the DN 100 or DN 150 inlet pipe(s) to the tank according to Fig. 6 only at the four
inlet connecting pieces.
CAUTION! Risk of property damage!
Connecting the inlet line to any other point may cause leakages, functional impair-
ments and damage to the unit.
Use the provided connecting pieces only!
Install the inlet pipes so that they can run empty of their own accord.
According to EN 12056-4, a gate valve (accessory) is required in the inlet pipe in front of
the tank if the unit is installed inside the building in (Fig. 9).
Bleeding (DN 70)
EN 12050-1 stipulates that the unit must be connected to a ventilation line which vents
via the roof and is absolutely necessary for the perfect working order of the unit. The con-
nection is established with the supplied hose section Ø 78 mm at the DN 70 connecting
piece on the top of the tank (Fig. 6, Fig. 7).
Install the piping so that it can run empty of its own accord.
Connection of two tanks
At units with two tanks, the tanks have to be connected to the bottom DN 150 connecting
piece with the supplied DN 150 hose section with clamps (Fig. 7).
Fig. 5: Flexible discharge pipe connection
To avoid the transfer of forces and vibrations
between the unit and the discharge piping, the con-
nection should be flexible. Therefore keep a distance
between the flange piece and pressure pipe (Fig. 5).
1
Pressure pipe
2
Hose sleeve
3
Flange piece
4
Keep a distance of approx. 40-60 mm
min. 40
1
3
2
4
Fig. 6: Preparation of the tank connecting pieces to be connected
• Cut out the base of the connecting piece as far as possible
with a keyhole saw of appropriate size (Pos. 1).
• If no keyhole saw is available, saw off the base approx.
15 mm in front of the annular bead (Pos. 2).
CAUTION! Risk of property damage!
Leakages can be caused by damaging or
removing the annular bead.
The annular bead must be completely present!
• Remove any burrs and excess material.
• Establish the connections carefully with the supplied hose
and hose clamps.
15
15
2
1
