Wilo DrainLift XL 2/10 Installation And Operating Instructions Manual page 32

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Fig. 3: Buoyancy safeguard
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• Observe the dimensions according to the installation plan (Fig. 2).
• According to EN 12056-4, installation rooms for lifting units must be of sufficient size so
that the unit is freely accessible for operating and maintenance work.
• There must be a sufficient working space of at least 60 cm in width and height available
next to and above all parts to be operated and subjected to maintenance.
• The installation room must be frost-proof, ventilated and well-lit.
• The installation surface must be firm (suitable for accommodating dowels), horizontal and
flat.
• The course of any existing or still-to-be installed inlet, pressure and ventilation lines is to
be checked with regard to connection options to the unit.
• Select an installation location suitable for the size of the unit and accessibility of the con-
nections.
• Dimensions of the switchgear (H x W x D): 320 mm x 300 mm x 120 mm
• Install the switchgear and breakdown barrier at a dry and frost-proof location.
• The site must also be protected from direct sunlight.
• Observe the accessories and catalogue specifications for outdoor installations.
• Observe the installation and operating instructions for the accessories!
7.2 Installation
Place the unit on a flat solid floor and align.
According to EN 12056-4, sewage lifting units must be installed in such a manner that they
cannot twist and turn.
Units which threaten to float must be installed so that they are anti-buoyant.
7.3 Connection of the piping
All piping must be installed without tension in a noise-insulated and flexible manner. The
unit must not be subjected to any pipeline forces or torques. The pipes (including valves)
are to be fastened and supported in such a manner that neither tensile nor compressive
forces are applied to the unit.
All line connections must be established with care. Carefully tighten any connections with
hose clamps (tightening torque of 5 Nm).
Do not reduce the pipe diameter in the direction of flow.
According to EN 12056-4, a gate valve is always required in the inlet pipe in front of the
tank and behind the non-return valve. (Fig. 9).
7.3.1 Discharge piping
CAUTION! Risk of property damage!
Occurring pressure surges (e.g. when closing the non-return valve) can be several
times more than the pump pressure, depending on the operating conditions (to avoid
this, see also 8.2.3 Setting the pump run follow-up time).
• The longitudinal force-fitted connection elements of the piping should therefore be
observed in addition to the corresponding pressure resistance.
• The discharge piping, including all installation parts, must reliably withstand the oper-
ating pressures which occur.
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.9).
Fix the unit to the floor with the enclosed fixation material
(Fig. 3).
• 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.
• Install the supplied threaded rods according to the instal-
lation drawing and the supplied instruction manual for the
mortar cartridges
• Fasten the tank to the floor so that it is anti-buoyant after
the curing of the mortar cartridges
WILO SE 03/2011