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WILO SE 10/2010
To avoid sudden valve closures, a follow-up time can be set in the switchgear in order for
the base-load pump to be operated up to slurping operation (refer to 8.2.3 for the setting).
The follow-up time is the period from when the deactivation point is fallen short of until
the base-load pump is switched off.
7 Installation and electrical connection
The product is delivered in single components to be assembled in accordance with these
installation and operating instructions. All protective equipment is to be activated. Non-
observance of the notes on the assembly and installation will put the safety of the product/
personnel at risk and invalidate the statements regarding safety.
DANGER! Risk of fatal injury!
Incorrect installation and electrical connection can pose a risk of fatal injury.
• The installation and electrical connection may be carried out only by qualified person-
nel in accordance with the applicable regulations!
• Observe the accident prevention regulations!
DANGER! Danger of suffocation!
Toxic or harmful substances in sewage sumps can cause infections or suffocation.
• For safety reasons, a second person must be present at all times when working in
sumps.
• Make sure the installation location is ventilated sufficiently.
7.1 Preparing the installation
CAUTION! Risk of property damage!
Incorrect installation can result in property damage.
• Have installation work carried out only by qualified personnel!
• Observe the national and regional regulations!
• Observe the installation and operating instructions for the accessories!
• Never pull the cable when installing the unit.
In particular the valid regional regulations (e.g. in Germany, the “Landesbauordnung (fed-
eral regulations for buildings), DIN 1986-100”) and, in general, the corresponding specifi-
cations of EN 12050-1 and EN 12056 (Gravity Drainage Systems Inside Buildings) should
be observed when installing lifting units.
• Observe the dimensions according to the installation plan in the appendix (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.
• Observe the installation and operating instructions for the accessories!
• Install the switchgear and Zener barrier at a dry and frost-proof location.
• The installation site must be protected from exposure to direct sunlight.
• Observe the accessories and catalogue specifications for outdoor installations.
7.2 Installation
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.
