Installation and operating instructions Wilo-RexaBloc RE
33
PRODUCT DESCRIPTION
English
2.8.2. Recommended monitoring equipment
The hydraulics is driven by a standard motor.
Standard motor are not overflow-proof. We
therefore recommend using an alarm switchgear
to record major leakage. In the event of a major
discharge of fluid (e.g. faulty piping), the motor
must switch off.
2.8.3. Sound pressure
NOTE
Also note all the information in the operating
and maintenance manual for the motor!
CAUTION: Wear ear defenders!
According to applicable laws and regula-
tions, ear protection must be worn if the
sound-pressure level is 85 dB(A) or more! The
end-user must make sure that this is complied
with!
The hydraulics generates a sound-pressure level
of approx. 70 dB (A) to 80 dB (A) during opera
-
tion.
However, the actual sound-pressure level
depends on several factors. These include, for
example, the installation, fixation of accessories
and piping, the duty point etc.
We recommend that the operator takes an ad-
ditional measurement at the workplace once the
hydraulics is running at its duty point and under
all operating conditions.
2.9. Standards and guidelines used
The hydraulics is subject to various European
directives and harmonised standards. See the EC
declaration of conformity for precise information
about these.
In addition, various standards are used as a basis
for operating, assembling and dismantling the
hydraulics.
2.10. CE marking
The CE marking is attached to the rating plate for
the hydraulics.
3. Product description
The hydraulics is manufactured with great care
and is subject to constant quality controls.
Trouble-free operation is guaranteed if they are
installed and maintained correctly.
3.1.
Intended use and fields of application
DANGER
– explosive fluids!
It is strictly prohibited to pump explosive
fluids (gasoline, kerosene etc.). The hydraulics
is not designed for these fluids.
The Wilo-RexaBloc RE… sewage hydraulics is suit
-
able for pumping:
•
Wastewater
•
Sewage containing faeces
•
Sludges with up to 8% dry matter (depending on
type)
The sewage hydraulics must
not
be used for
pumping:
•
Drinking water
•
Fluids containing hard components such as stone,
wood, metal, sand etc.
•
Highly flammable and explosive fluids in pure
form
The intended use includes complying with these
instructions. Any other use is considered to be
outside the intended use.
3.2. Set-up
The Wilo-RexaBloc RE are sewage hydraulics with
a flanged IEC standard motor in monobloc design
for stationary dry well installation.
Fig. 1: Description
1 Hydraulics
6
Sealing chamber
monitoring (optionally
available)
2 Bearing bracket
7
Venting screw
3 IEC standard motor
8
Drainage screw
4 Suction connection
9 Support
5
Pressure connection
A "Bare shaft" design (hydraulics without motor)
B
Unit (hydraulics with flanged motor)
3.2.1. Version
As standard, a unit consisting of hydraulics with a
flanged motor is delivered.
Alternatively, a "bare shaft" design can be deliv
-
ered. In this case, the operator has to provide a
suitable motor and install it on site.
3.2.2. Hydraulics
Hydraulics housing and bearing bracket as a self-
contained unit, with channel impeller or vortex
impeller, axial suction port and radial pressure
port. The connections are configured as flange
connections.
Bearing bracket with seal on the fluid and motor
sides, as well as sealing chamber and leakage
chamber for receiving fluid ingress through the
seal. The sealing chamber is filled with environ
-
mentally harmless medicinal white oil.
The hydraulics is not self-priming, in other
words, the fluid must flow in either automati
-
cally or with supply pressure.
3.2.3. Monitoring equipment
As an option, the sealing chamber can be moni
-
tored by an external pencil electrode. This signals
if there is water ingress into the sealing chamber
through the mechanical seal on the fluid side.
