Return Delivery; Installation; General; Installation Methods - Wilo Rexa PRO Serie Instrucciones De Instalación Y Funcionamiento

INSTALLATION

that the impellers move freely and check the hous-
ing coatings for damage.
Prior to commissioning, the fill level in the sealing
chamber should be checked and topped up, if
necessary.
Damaged coatings must be repaired immediately.
Only an intact coating fulfils its intended purpose.
Please note that elastomer parts and coatings be-
come brittle over time. If the product is to be stored
for longer than 6 months, we recommend checking
these parts and replacing them as necessary. Con-
sult the manufacturer for details.

4.4. Return delivery

Pumps that are returned to the factory must be
properly packaged. This means that contaminants
have been removed from the pump and that it has
been hygienically decontaminated if used with
fluids that are hazardous to health.
For shipping, the parts must be packed in tear-proof
plastic bags of sufficient size in such a manner that
they are tightly sealed and leak proof. Furthermore,
the packaging must protect the pump from damage
during transportation. If you have any questions,
please contact the manufacturer.
5. Installation
In order to prevent damage to the product or serious
injury during installation, the following points must
be observed:
• Installation work – assembly and installation of
the pump – may only be carried out by qualified
persons. The safety instructions must be followed
at all times.
• The pump must be inspected for transport damage
before any installation work is carried out.

5.1. General

For planning and operation of sewage systems, ob-
serve the applicable local regulations and directives
for sewage technology (such as those of the Ger-
man Association for Water, Wastewater and Waste).
Note that pressure surges can occur, in particular
with stationary installations where water is pumped
with relatively long discharge pipes (especially with
steady ascents or steep terrain).
Pressure surges can result in destruction of the
pump/system and noise pollution due to valves
opening and closing suddenly. Pressure surges can
be prevented by applying suitable measures (e.g.
non-return valves with an adjustable closing time,
or special routing of the discharge pipeline).
After pumping water containing calcium, clay, or
cement, the pump should be flushed with pure
water to prevent encrustation and to avoid related
breakdowns later on.
If you are using level control, make sure that the
minimum water coverage is present. Air pockets
Installation and operating instructions Wilo-Rexa PRO
in the hydraulic housing or pipe system must be
avoided at all costs and must be removed by using
a suitable ventilation system and/or by placing the
pump at a slight angle (if installed as a portable
pump). Protect the pump from frost.

5.2. Installation methods

• Vertical stationary wet well installation with guide
system
• Vertical portable wet well installation with pump
foot
• Vertical stationary dry well installation
5.3. Installation
DANGER: from falling!
When installing the pump and its accessories,
work is sometimes performed directly at the
edge of the basin or sump. Carelessness or
wearing inappropriate clothing could result in a
fall. There is a risk of fatal injury! Take all neces-
sary safety precautions to prevent this.
The following information should be taken into
consideration when installing the pump:
• This work must be carried out by a qualified person
and electrical work must be carried out by an elec-
trician.
• The operating space must be clean, free of coarse
solids, dry, frost-free and, if necessary, decontam-
inated. It must also be suitable for the particular
pump.
• When working in sumps, a second person must be
present for safety reasons. If there is a risk of toxic
or asphyxiating gases building up, the necessary
precautions must be taken.
• The system planner should select the sump size
and motor cooling time according to the ambient
conditions in operation.
• Ensure that lifting equipment can be set up without
any trouble, since this is required for assembly and
removal of the pump. It must be possible to reach
the pump safely in its operating and storage loca-
tions using the lifting equipment. The machine must
be positioned on a firm bearing surface. For trans-
porting the pump, the lifting gear must be secured
to the lifting eyelets or handle provided. When using
chains, they must be connected with a shackle to
the lifting eyelets or the handle. Lifting gear must
be technically approved.
• Power supply cables must be laid out in such a way
that safe operation and trouble-free assembly/dis-
mantling are possible at all times. The pump must
never be carried or dragged by the power supply
cable. Check whether the cable present is adequate
for the type of installation selected, in terms of its
cross-section and its length.
• When using switchgear, the corresponding protec-
tion class must be observed. In general, switchgear
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