Product Description - Wilo Rexa FIT Serie Manual Del Usuario

• The machine must be protected from direct sunlight,
heat, dust, and frost. Heat and frost can cause consid-
erable damage to propellers, rotors and coatings!
• The rotors or propellers must be rotated at regular
intervals. This prevents the bearing from locking, and
the film of lubricant on the mechanical shaft seal is
renewed. This also prevents the gear pinions (if present
on the product) from locking and also renews the lubri-
cating film on the gear pinions (preventing rust film
deposits).
Beware of sharp edges!
Sharp edges can form on rotors, propellers and
hydraulic openings. There is a risk of injuries!
Wear protective gloves.
• If the product has been stored for a long period of time
it should be cleaned of impurities such as dust and oil
deposits before start-up. Rotors and propellers should
be checked for smooth operation. The housing coat-
ings should be checked for damage.
Before start-up, the filling levels (oil, motor fill-
ing, etc) should be checked and topped up, if
necessary. Products filled with drinking water
should be completely filled before start-up!
Damaged coatings should be repaired immedi-
ately. Only a coating that is completely intact ful-
fills the criteria for intended usage!
If these rules are observed, your product can be stored
for a longer period. Please remember that elastomer
parts and coatings become 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. If this is the case, please consult the
manufacturer.
3.4 Returning to the product
Products that are returned to the factory must be
properly packaged. In this context, properly means that
impurities have been removed from the product and
that it has been decontaminated, if it was used with
fluids that are hazardous to health. The packaging must
protect the product from damage during transporta-
tion. If you have any questions please contact the
manufacturer!

4 Product description

The product has been manufactured with great care
and is subject to constant quality controls. Trouble-
free operation is guaranteed if it is installed and main-
tained correctly.
4.1 Proper use and fields of application
The Wilo-Rexa FIT... submersible motor pumps are
suitable for pumping:
• sewage and waste water
• waste water containing feces
• communal and industrial waste water
• sludge up to a maximum of 8% dry solids (depending
on the type)
Installation and operating instructions Wilo-Rexa FIT...
and for draining buildings and properties in accordance
with EN 12050 (while observing country-specific fore-
words and regulations such as DIN EN 12050-1) and
for use in pits.
The submersible motor pumps must not be used for
pumping:
• drinking water
• fluids with hard components such as stone, wood,
metal and sand.
Beware of electrical current
When using the product in swimming pools or
other accessible pools, there is a risk of fatal
injury due to electrical current. Observe the fol-
lowing points:
Use is strictly forbidden if any persons are in the
pool!
If there are no people in the pool, protective
measures must
DIN VDE 0100-702.46
national regulations).
The product is used for pumping waste water.
Therefore, pumping drinking water is strictly for-
bidden!
Proper use also includes observation of these instruc-
tions. Any other use is regarded as improper.
4.2 Construction
The Wilo-Rexa units... are floodable submersible waste
water motor pumps, which can be operated vertically
as both stationary and portable wet installations.
Fig. 1: Description
1 Cable
2 Handle
3 Motor housing
4 Oil separation chamber
4.2.1 Hydraulics
The hydraulic housing and impeller are made of cast
iron. The discharge side connection is designed as a
horizontal flange connection. Various types of impeller
are used:
• free-flow impellers
• single-channel impellers
• multiple-channel impellers
The product is not self-priming, in other words,
the pump medium must taper automatically or
flow with primary pressure.
4.2.2 Motor
The motor housing is manufactured in stainless steel.
In the AC or three-phase current version, dry run
motors are used as the motors. The motor is cooled by
the fluid around it. The waste heat is directly trans-
ferred via the motor housing to the pumped liquid.
Therefore, these units must always be submerged for
English
be taken according to
(or the appropriate
5 Hydraulic housing
6 Intake port
7 Discharge port
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