Wilo RexaBloc RE User manual

6078738 Ed. 02-10/2022 WH
Pioneering for You
Wilo-RexaBloc RE/Rexa BLOC
en Installation and operating instructions
6078738 Ed. 02-10/2022 WH

Fig. 1a - 08.52W, 10.44W, 15.84D, V08.68, V08.97, V10.73, V15.84
AB
2
4
7
8
9
53
1
6
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89
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AB
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Fig. 1b- V05.22, V05.32, C05.32, V06.22, C06.34, V06.62, V08.24, C08.41, V08.42, C08.43, V08.52, V10.42, C10.51

Fig. 2a - 08.52W, 10.44W, 15.84D, V08.68, V08.97, V10.73, V15.84
AB
1 1
Fig. 1c - V05.22, V05.32, C05.32, V06.22, C06.34, V06.62, V08.24, C08.41, V08.42, C08.43, V08.52, V10.42, C10.51
7
6
5
4
3
2
1

Fig. 2c - V05.22, V05.32, C05.32, V06.22, C06.34, V06.62, V08.24, C08.41, V08.42, C08.43, V08.52, V10.42, C10.51
B
22
4x
Fig. 2b - V05.22, V05.32, C05.32, V06.22, C06.34, V06.62, V08.24, C08.41, V08.42, C08.43, V08.52, V10.42, C10.51
A B
1 1

Fig. 3a - 08.52W, 10.44W, 15.84D, V05.22, V05.32, C05.32, V06.22, C06.34, V06.62, V08.24, C08.41, V08.42, C08.43, V08.52, V08.68,
V08.97, V10.42, C10.51, V10.73, V15.84
2
1
4
7 8
5
36
6
A
A
9 9 9 9
Fig. 3b - V05.22, V05.32, C05.32, V06.22, C06.34, V06.62, V08.24, C08.41, V08.42, C08.43, V08.52, V10.42, C10.51
9
9
9
9
A
2
1
4
7
8
5
3
10
A

Fig. 4a - 08.52W, 10.44W, 15.84D, V08.68, V08.97, V10.73,
V15.84
Fig. 5
D-
D+
L- L- L-
Fig. 4b - V05.22, V05.32, C05.32, V06.22, C06.34, V06.62,
V08.24, C08.41, V08.42, C08.43, V08.52, V10.42, C10.51
D-
D+
Fig. 4c - V05.22, V05.32, C05.32, V06.22, C06.34, V06.62,
V08.24, C08.41, V08.42, C08.43, V08.52, V10.42, C10.51
D+
D-

Fig. 6a - 08.52W, 10.44W, 15.84D, V08.68, V08.97, V10.73, V15.84
2
14
78
5
5
5
5
5
5
3
6910 11 12
2
1
A
A
2
1
4
7
5
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6910
2
1
A
A
Fig. 6b - V05.22, V05.32, C05.32, V06.22, C06.34, V06.62, V08.24, C08.41, V08.42, C08.43, V08.52, V10.42, C10.51

Fig. 7a - 08.52W, 10.44W, 15.84D, V08.68, V08.97, V10.73
10 11 14 15 13 1612
Fig. 7b - V05.22, V05.32, C05.32, V06.22, C06.34, V06.62, V08.24, C08.41, V08.42, C08.43, V08.52, V10.42, C10.51
1014 13 16

Fig. 8a - 08.52W, 10.44W, 15.84D, V05.22, V05.32, C05.32, V06.22, C06.34, V06.62, V08.24, C08.41, V08.42, C08.43, V08.52, V08.68,
V08.97, V10.42, C10.51, V10.73, V15.84
2
1
22
3
2
2
Fig. 8b - V05.22, V05.32, C05.32, V06.22, C06.34, V06.62, V08.24, C08.41, V08.42, C08.43, V08.52, V10.42, C10.51
1
3
2
2x
2
3

Installation and operating instructions Wilo-RexaBloc RE/Rexa BLOC 11
English
1. Introduction 12
1.1. About this document 12
1.2. Personnelqualications 12
1.3. Copyright 12
1.4. Subject to change 12
1.5. Warranty 12
2. Safety 12
2.1. Instructions and safety instructions 13
2.2. General safety information 13
2.3. Drive 13
2.4. Electrical work 13
2.5. Safety and monitoring devices 14
2.6. Conduct during operation 14
2.7. Pumpeduids 14
2.8. Operator responsibilities 14
2.9. Standards and guidelines used 14
2.10. CEmarking 14
3. Product description 15
3.1. Intendeduseandeldsofapplication 15
3.2. Structure 15
3.3. Operation in an explosive atmosphere 15
3.4. Operation with frequency converters 15
3.5. Operating modes 15
3.6. Technical data 16
3.7. Type key 16
3.8. Scope of delivery 16
3.9. Accessories 16
4. Transportation and storage 16
4.1. Delivery 17
4.2. Transportation 17
4.3. Storage 17
4.4. Return delivery 17
5. Installation 17
5.1. General 17
5.2. Installation types 18
5.3. Installation 18
5.4. Electrical connection 20
5.5. Operator responsibilities 20
6. Commissioning 20
6.1. Electrical components 21
6.2. Direction of rotation monitoring 21
6.3. Operation in potentially explosive
atmospheres 21
6.4. Operation with frequency converters 21
6.5. Commissioning 21
6.6. Conduct during operation 21
7. Shutdown/disposal 22
7.1. Shutdown 22
7.2. Removal 22
7.3. Return delivery/storage 22
7.4. Disposal 22
8. Maintenance and repair 23
8.1. Operatinguid 23
8.2. Maintenance intervals 23
8.3. Maintenance work 24
8.4. Repairs 25
9. Troubleshooting and possible solutions 27
10. Appendix 28
10.1. Tightening torques 28
10.2. Spare parts 28

12 WILOSE10/2022V05DINA4
English INTRODUCTION
1. Introduction
1.1. About this document
The language of the original operating instructions is
German. All other languages of these instructions are transla-
tions of the original operating instructions.
This manual is divided into individual sections, which are
listed in the table of contents. Each section has a meaningful
heading which clearly describes its content.
A copy of the EC declaration of conformity is an integral part
of these installation and operating instructions.
Ifatechnicalmodicationismadetothedesignsnamed
there without our agreement, this declaration loses its
validity.
1.2. Personnel qualications
All personnel who work on or with the hydraulics must be
qualiedforsuchwork;electricalwork,forexample,mayonly
becarriedoutbyaqualiedelectrician.Allpersonnelmustbe
of legal age.
National accident prevention regulations must also be
observed as a basis by the operating and maintenance per-
sonnel.
It must be ensured that personnel have read and understood
theinstructionsinthisoperatingandmaintenancemanual;if
necessary, this manual must be ordered from the manufac-
turer in the required language.
The hydraulics is not intended for use by persons (including
children) with limited physical, sensory or mental capacities
or without the relevant experience or knowledge, unless
they are supervised by a person responsible for their safety
and receive instructions from this person on how to use the
hydraulics.
Children must be supervised in order to ensure that they do
not play with the hydraulics.
1.3. Copyright
This operating and maintenance manual has been copy-
righted by the manufacturer. The operating and maintenance
manual is intended for use by installation, operating and
maintenance personnel. It contains technical regulations and
drawings which may not be reproduced or distributed, nei-
ther completely nor in part, or used for purposes of compe-
tition, or shared with others without the express consent of
the manufacturer. The illustrations used may differ from the
original and are only intended as an exemplary representation
of the hydraulics.
1.4. Subject to change
The manufacturer reserves the right to make technical mod-
icationstosystemsand/orcomponents.Thisoperatingand
maintenance manual refers to the hydraulics shown on the
title page.
1.5. Warranty
Ingeneral,thespecicationsinthecurrent“GeneralTerms
andConditions”applytothewarranty.Youcanndthese
here: www.wilo.com/legal
Any deviations must be contractually agreed and shall then
be given priority.
1.5.1. General
The manufacturer is obliged to correct any defects found in
the hydraulics it sells, provided that the defects meet one or
more of the following requirements:
• The quality defects were caused by the materials used or
the way the device was manufactured and/or designed
• The defects were reported in writing to the manufac-
turer within the agreed warranty period
• The hydraulics was used only as prescribed
• All monitoring devices are connected and were tested
before commissioning.
1.5.2. Warranty period
Thedurationofthewarrantyperiodisstipulatedinthe“Gen-
eral Terms and Conditions”.
Any deviations must be contractually agreed!
1.5.3. Spare parts, add-ons and modications
Only genuine spare parts from the manufacturer may be
usedforrepairs,replacements,add-onsandmodications.
Unauthorisedadd-onsandmodicationsortheuseof
non-original spare parts can seriously damage the hydrau-
lics and/or injure personnel.
1.5.4. Maintenance
The prescribed maintenance and inspection work should be
carried out regularly. This work may only be carried out by
qualied,trainedandauthorisedpersonnel.
1.5.5. Damage to the product
Damage and malfunctions that endanger safety must be
eliminated immediately and properly by trained personnel.
The hydraulics may only be operated if it is in perfect working
order.
In general, repairs should only be carried out by Wilo cus-
tomer service!
1.5.6. Exclusion of liability
No warranty claims will be accepted or liability will be
assumed for hydraulics damage if any of the following items
apply:
• Inadequatecongurationbythemanufacturerdueto
the information provided by the operator or customer
beinginsufcientand/orincorrect
• Non-compliance with safety instructions and work
instructionsasspeciedinthisoperatingandmainte-
nance manual
• Improper use
• Incorrect storage and transport
• Improper installation/dismantling
• Insufcientmaintenance
• Incorrect repairs
• Inadequate construction site or construction work
• Chemical,electrochemicalandelectricalinuences
• Wear
This means the manufacturer’s liability also excludes all
liabilityforpersonalinjury,materialdamageand/ornancial
losses.
2. Safety
This section lists all the generally applicable safety instruc-
tions and technical information. In addition, all the other
sectionscontainspecicsafetyinstructionsandtechni-

Installation and operating instructions Wilo-RexaBloc RE/Rexa BLOC 13
SAFETY English
cal information. All instructions and information must be
observed and followed during the various phases of the
hydraulics’s life cycle (installation, operation, maintenance,
transport etc.)! The operator is responsible for ensuring that
all personnel follow these instructions and guidelines.
2.1. Instructions and safety instructions
This manual uses instructions and safety instructions for
preventing personal injury and material damage. To clearly
identify them for personnel, the instructions and safety
instructions are distinguished as follows:
• Instructionsappearin“bold”andreferdirectlytothe
preceding text or section.
• Safetyinstructionsareslightly“indentedandbold”and
always start with a signal word.
• Danger
Serious or fatal injuries can occur!
• Warning
Serious injuries can occur!
• Caution
Injuries can occur!
• Caution (notice without symbol)
Substantial material damage can occur. Irreparable
damage is possible!
• Safety instructions that refer to personal injury appear
in black and are always accompanied by a safety symbol.
Danger, prohibition or instruction symbols are used as
safety symbols. Example:
Danger symbol: General hazard
Danger symbol, e.g. electrical current
Symbolforprohibitedaction,e.g.“Noentry!”
Instructionsymbol,e.g.“Wearprotectivecloth-
ing.”
The safety symbols used conform to the generally applicable
directives and regulations, such as DIN, ANSI.
• Safety instructions that only refer to material damage
are printed in grey, without safety symbols.
2.2. General safety information
• When installing or removing the hydraulics, never work
alone in rooms and sump. A second person must always
be present.
• The hydraulics must always be switched off before any
work is performed on it (assembly, dismantling, main-
tenance, installation). The drive for the hydraulics must
be disconnected from the electrical system and secured
against being switched on again. All rotating parts must
have come to a standstill.
• The operator must report any faults or irregularities that
occur to a line manager immediately.
• The operator must shut down the equipment immedi-
ately if defects occur that represent a safety risk. These
include:
• Failure of the safety and/or monitoring devices
• Damage to important parts
• Damage to electrical equipment, cables and insula-
tion.
• Tools and other objects should only be kept in their des-
ignated places so that safe operation is ensured.
• Sufcientventilationmustbeprovidedwhenworkingin
enclosed spaces.
• When welding and/or working with electrical devices,
make sure there is no risk of explosion.
• Only use lifting gear which is legally designated as such
andofciallyapproved.
• The lifting gear must be kept safely and must be suitable
for the conditions of use (weather, hooking unit, load,
etc.).
• Mobile equipment for lifting loads should be used in
such a way that it is guaranteed to remain stable during
operation.
• When using mobile equipment for lifting non-guided
loads, take action to prevent tipping, shifting, sliding etc.
• Measures should be taken to ensure that no person is
ever directly beneath a suspended load. Furthermore, it
is prohibited to move suspended loads over workplaces
where people are present.
• If mobile equipment is used for lifting loads, a second
person should be present to coordinate the procedure if
required(e.g.iftheoperator’seldofvisionisblocked).
• The load to be lifted must be transported so that no-one
will be injured if there is a power failure. Furthermore,
if such work is being performed outdoors, it must be
cancelled if the weather conditions worsen.
These instructions must be strictly observed. Non-
observance can result in personal injury and/or substantial
material damage.
2.3. Drive
Thehydraulicshasastandardisedconnectionangefor
installing an IEC standard motor. See the technical data for
the performance data (e.g. size, construction, hydraulic rated
power, speed) needed to select a motor.
2.4. Electrical work
DANGER due to electrical current!
Incorrectly performed electrical work can
result in fatal injury! This work may only be
carried out by a qualied electrician.
The motor must be connected in accordance with the infor-
mation in the operating and maintenance manual for the
motor. The governing local directives, standards and regula-
tions(e.g.VDE0100)aswellastherequirementsofthelocal
energy supply company must be observed.
The person operating the motor must know where it is
supplied with power and how to cut off the supply. A motor
protection switch must be installed on-site. It is advisable to
install a residual-current device (RCD). If there is a possibility
that people can come into contact with the motor and the
uid,theconnectionmust be equipped with an additional
residual-current device (RCD).

14 WILOSE10/2022V05DINA4
English SAFETY
The hydraulics must always be earthed. In a standard system,
the hydraulics are earthed through the motor’s connection
to the mains. Alternatively, the hydraulics can be earthed
through a separate connection.
2.5. Safety and monitoring devices
CAUTION!
Never operate the hydraulics if the attached
monitoring devices have been removed or
damaged, or if they do not work!
NOTICE
Also note all the information in the operating
and maintenance manual for the motor!
Thehydraulicsarenotttedwithmonitoringdevicesas
standard.
Optionally, the sealing chamber can be monitored with an
external pencil electrode.
All existing monitoring devices must be connected by an
electrician and checked to ensure that they function cor-
rectly before commissioning.
The personnel must be informed about the installed systems
and how they work.
2.6. Conduct during operation
CAUTION! Risk of burns!
The housing parts can heat up to well above
40°C. There is a risk of burns!
• Never touch parts of the housing with your
bare hands.
• After switching them off, let the hydraulics
cool down to ambient temperature.
• Wear heat-resistant protective gloves.
During operation of the hydraulics, always follow the locally
applicable laws and regulations for work safety, accident
prevention and handling electrical machinery. To help ensure
safe working practice, the responsibilities of employees
shouldbeclearlyspeciedbytheoperator.Allpersonnelare
responsible for ensuring that regulations are observed.
During operation, all gate valves in the suction and discharge
pipe must be completely open.
If the slide valves on the suction and discharge sides are
closed during operation, the uid in the hydraulics housing
is heated up by the pumping movement. This heating
creates strong pressure in the hydraulics housing. The
pressure can result in the hydraulics exploding! Before
switching on the hydraulics, ensure that all the slide valves
are open and open any closed slide valves if necessary.
2.7. Pumped uids
Eachuiddifferswithrespecttocomposition,corrosiveness,
abrasiveness, dry matter content and in many other aspects.
Generally, the hydraulics can be used for many applications.
Please note that if requirements change (density, viscosity or
general composition), this can also affect many parameters
of the hydraulics.
When using or replacing the hydraulics to pump a different
uid,observethefollowingpoints:
• Theuidcanbecontaminatedbyoilfromthesealing
chamber if the mechanical seal is defective.
Pumping drinking water is not permitted!
• Hydraulics that has been operated to pump contami-
nated water must be cleaned thoroughly before being
usedtopumpotheruids.
• Hydraulicsthathasbeenoperatedtopumpuidscon-
tainingfaecesand/oruidsthatarehazardoustohealth
must be generally decontaminated before being used to
pumpotheruids.
First clarify whether the hydraulics may be used to pump
other uids!
2.8. Operator responsibilities
2.8.1. Integration into the existing safety concept
The operator shall ensure that the unit is integrated into the
existing safety concept and that it can be switched off in an
emergency using the existing safety shutdowns.
2.8.2. Recommended monitoring devices
The hydraulics are driven by a standard motor. Standard
motorsarenotoverow-proof.Wethereforerecommend
using an alarm switchgear to record major leakages. In the
eventofamajordischargeofuid(e.g.faultypiping),the
motor must switch off.
2.8.3. Sound pressure
NOTICE
Also note all the information in the operating
and maintenance manual for the motor!
CAUTION: Wear noise protection!
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operation.
However, the actual sound pressure depends on several
factors.Theseincludee.g.installation,xationofaccessories
and pipe, duty point etc.
We recommend that the operator take an additional meas-
urement 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. Refer to the EC declaration of con-
formity for precise information about this.
In addition, various standards are used as a basis for operat-
ing, installing and dismantling the hydraulics.
2.10. CEmarking
The CE marking is attached to the rating plate for the
hydraulics.

Installation and operating instructions Wilo-RexaBloc RE/Rexa BLOC 15
PRODUCT DESCRIPTION English
3. Product description
The hydraulics is manufactured with great care and is subject
to constant quality controls. Trouble-free operation is guar-
anteed if the device is installed and maintained correctly.
3.1. Intended use and elds of application
DANGER due to explosive uids!
It is strictly prohibited to pump explosive
uids (petrol, kerosene etc.). The hydraulics is
not designed for these uids!
The Wilo-RexaBloc RE… sewage hydraulics is suitable 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 stones,
wood, metals, sand etc.
• Highlyammableandexplosiveuidsinpureform
Intended use also includes compliance with this manual. Any
other use is regarded as non-intended use.
3.2. Structure
TheWilo-RexaBlocREaresewagehydraulicswithaanged
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 Discharge connection
A“Bareshaft”design(hydraulicswithoutmotor)
BUnit(hydraulicswithangedmotor)
3.2.1. Version
Asstandard,aunitconsistingofhydraulicswithaanged
motor is delivered.
Alternatively,a“bareshaft”designcanbedelivered.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dischargeport.Theconnectionsarecong-
uredasangeconnections.
Bearingbracketwithsealontheuidandmotorsides,aswell
assealingchamberandleakagechamberforreceivinguid
ingressthroughtheseal.Thesealingchamberislledwith
environmentally harmless medicinal white oil.
The hydraulics are not self-priming, in other words, the
uid must ow in either automatically or with supply
pressure.
3.2.3. Monitoring devices
As an option, the sealing chamber can be monitored by an
external pencil electrode. This signals if there is water ingress
into the sealing chamber through the mechanical seal on the
uidside.
3.2.4. Seal
Sealingontheuidsideisachievedbyabidirectional
mechanical seal. Sealing on the motor side is achieved by a
rotary shaft seal.
3.2.5. Materials
• Hydraulics housing: EN-GJL-250
• Impeller: EN-GJL-250 / EN-GJS-500
• Bearing bracket: EN-GJL-250
• Housing cover: EN-GJL-250
• Shaft: 1.4021
• Static gaskets: NBR
• Seal
• Ontheuidside:SiC/SiC
• On the motor side: NBR or carbon/aluminium oxide
• Motor housing: EN-GJL-250
3.2.6. Drive
ThehydraulicsisdrivenbyIECstandardmotorsin“B5”
construction. For more information about the motor and the
monitoring devices present, see the installation and operat-
ing instructions for the motor manufacturer.
3.3. Operation in an explosive atmosphere
The hydraulics must not be operated in an explosive atmos-
phere!
3.4. Operation with frequency converters
NOTICE
Also note all the information in the operating
and maintenance manual for the motor!
Operation on a frequency converter is possible. The following
parameters must be observed:
• The maximum speed must not exceed1450rpm.
• ContinuousdutywithavolumeowofQopt<0.7m/s
should be avoided.
• The circumferential speed must not fall below a mini-
mumof13m/s.
NOTICE
The circumferential speed can be calculated as
follows: v = n · d · π / 60,000
Key:
-n = speed in rpm
-d = impeller diameter in mm
-v = circumferential speed in m/s
3.5. Operating modes
See the rating plate or installation and operating instructions
for the motor to see the possible operating modes.
3.5.1. Operating mode S1 (continuous duty)
The motor can operate continuously at the rated load with-
out exceeding the permissible temperature.

16 WILOSE10/2022V05DINA4
English TRANSPORTATION AND STORAGE
3.5.2. Operating mode S2 (short-time duty)
Themaximumoperatingperiodforthemotorisspeciedin
minutes, e.g. S2-15. The pause must last until the machine
temperature no longer differs from the temperature of the
coolantbymorethan2K.
3.5.3. Operating mode S3 (intermittent periodic duty)
Thisoperatingmodedenesacombinationofperiodsof
operation and standstill of the motor. With S3 operation,
the values given are always calculated based on a period of
10min.
Example: S3 25%
Operatingtime25%of10min=2.5min/standstilltime
75%of10min=7.5min
3.6. Technical data
The following technical data can be found on the rating plate:
Max. delivery head: Hmax
Max.volumeow: Qmax
Rated power required from
hydraulics: P2
Discharge connection: X-]
Suction connection: [-X
Fluid temperature: T
Size of standard motor: Type key
Standard speed: N
Weight: Mhydr
The total weight is calculated from the weight of the
hydraulics and the weight of the motor (see rating plate on
motor)!
ThedetailedmotordataaccordingtoEU2019/1781canbe
consulted via the motor’s article number here:
https://qr.wilo.com/motors
3.7. Type key
Example: Wilo-Rexa BLOC-V08.52-260DAH132M4
BLOC Series
V
Impeller shape
V = vortex impeller
C = single-channel impeller
M = multi-channel
08 Sizedischargeconnection,e.g.08=DN80
52 Internal performance indicator
260 Impeller diameter in mm
D
Flange connections
A = ANSI connection
D = DN connection
A
Material version
A = standard version
Y = special version
H
Installation type
H = horizontal
V = vertical
132m Construction size of standard motor
4Number of poles for the necessary hydraulics
speed
Alternative type key
Example: Wilo-RexaBloc RE 08.52W-260DAH132M4
RE Series
08 Sizedischargeconnection,e.g.08=DN80
52 Internal performance indicator
W
Impeller shape
W = vortex impeller
D = three-channel impeller
260 Impeller diameter in mm
D
Flange connections
D = DN connection
A = ANSI connection
A
Material version
A = standard version
Y = special version
H
Installation type
H = horizontal
V = vertical
132m Construction size of standard motor
4Number of poles for the necessary hydraulics
speed
3.8. Scope of delivery
• Version:
• Unit: Sewage hydraulics with built-on standard motor
• “Bareshaft”version:Sewagehydraulicswithout
motor
• Transport shackle built onto the discharge port as
attachment point
• Installation and operating instructions:
• Unit: separate instructions for hydraulics and motor
• “Bareshaft”version:Instructionsforhydraulics
• CE declaration
3.9. Accessories
• Connection cable, sold by the metre
• External pencil electrode for sealing chamber monitoring
• Level control devices
• Fixation accessories and chains
• Switchgear, relays and plugs
4. Transportation and storage
NOTICE
Also note all the information regarding trans-
port and storage in the operating and mainte-
nance manual for the motor manufacturer!

Installation and operating instructions Wilo-RexaBloc RE/Rexa BLOC 17
INSTALLATION English
4.1. Delivery
Upon delivery, check immediately that the shipment is
complete and undamaged. If any parts are damaged or
missing, the transport company or the manufacturer must be
notiedonthedayofdeliverysinceclaimscannotbemade
afterwards. Damage to parts must be noted on the freight
documentation!
4.2. Transportation
Only the designated and approved fastening devices, trans-
portation and lifting equipment may be used for transpor-
tation.Thesemusthavesufcientload-bearingcapacityto
ensure that the hydraulics can be transported safely. When
using chains, these must be secured against slipping.
Personnelmustbequaliedforthetasksandmustfollowall
applicable national safety regulations during the work.
The hydraulics is delivered by the manufacturer or shipping
agency in suitable packaging. This normally precludes the
possibility of damage occurring during transportation and
storage. The packaging should be stored safely for reuse if
the product is frequently used at different locations.
Note the additional information in the operating and
maintenance manual of the motor manufacturer regarding
transportation.
4.3. Storage
Newly supplied hydraulics are prepared so that they can be
stored for at least 1 year. The hydraulics should be cleaned
thoroughly before they are put into temporary storage!
Note the additional information in the operating and main-
tenance manual for the motor regarding “storage”.
The following should be taken into consideration for storage:
• Placethehydraulicsonarmsurfaceandsecureit
against slipping and falling over. Sewage hydraulics are
stored horizontally.
DANGER due to risk of falling over!
Never set the hydraulics down if unsecured.
If the hydraulics falls over, this may lead to
injuries!
• Our hydraulics can be stored at temperatures down to
-15°C.Thestoreroommustbedry.Werecommenda
frost-protected room for storage with a temperature
between5°Cand25°C.
• The hydraulics must not be stored in rooms in which
welding work is carried out because the resulting gases
or radiation can damage the elastomer components and
coating.
• Suction and discharge connections must be sealed
securely to prevent contamination getting in.
• The hydraulics must be protected from direct sunlight,
heat, dust and frost. Heat or frost can cause serious
damage to impellers and coatings!
• The impellers should be checked at regular intervals.
This prevents the bearings from jamming and renews the
lubricationlmonthemechanicalseal.
WARNING! Sharp edges!
Sharp edges may form on the impeller and
on the openings of the suction and discharge
ports. There is a risk of injury! Wear the nec-
essary protective clothing, such as protective
gloves.
• If the hydraulics has been stored for a long period of
time, it should be cleaned of impurities such as dust
and oil residue before commissioning. Check that the
impellers move freely and check the housing coatings for
damage.
Prior to commissioning, the ll level in the sealing chamber
should be checked and topped up, if necessary!
Damaged coatings must be repaired immediately. Only an
intact coating fulls its intended purpose!
Please note that elastomer components and coatings
become naturally 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. Please consult
Wilo customer service for details.
4.4. Return delivery
Hydraulics that are returned to the factory must be properly
packaged. This means that impurities have been cleaned
from the hydraulics and that it has been decontaminated if
usedtopumpuidsthatarehazardoustohealth.
For shipping, the parts must be packed in tear-proof plastic
bagsofsufcientsizeinsuchamannerthattheyaretightly
sealed and leak-proof. Furthermore, the packaging must pro-
tect the hydraulics from damage during transportation. If you
have any questions, please contact Wilo customer service!
5. Installation
In order to prevent damage to the device or serious injury
during installation, the following points must be observed:
• Installation work – assembly and installation of the
hydraulics–mayonlybecarriedoutbyqualiedper-
sons. The safety instructions must be followed at all
times.
• The hydraulics must be inspected for transport damage
before any installation work is carried out.
5.1. General
For design and operation of technical sewage systems,
observe the pertinent local regulations and directives for
sewage technology (such as those of sewage technology
associations).
Note that, in stationary installations, pressure surges can
occur in cases where water is pumped with longer discharge
pipelines (especially with steady ascents or steep terrain).
Pressure surges can result in destruction of the hydraulics/
systemandnoisepollutionduetoapknock.Pressuresurges
can be prevented by applying suitable measures (e.g. swing
check valves with an adjustable closing time or special rout-
ing of the discharge pipeline).
Air pockets in the hydraulics or pipeline system must be
avoided at all costs and must be removed using a suitable
ventilation system.
Protect the hydraulics from frost.

18 WILOSE10/2022V05DINA4
English INSTALLATION
5.2. Installation types
DANGER due to units falling over!
Vertical installation may only be carried out
for units up to 7.5kW. If the unit falls over,
there is a risk of injury!
NOTICE
Horizontal dry well installation: only products
with“...H...”
Vertical dry well installation: only products with
“...V...”≤7.5kW
5.3. Installation
NOTICE
Also note all the information regarding installa-
tion in the operating and maintenance manual
from the motor manufacturer!
The following information should be taken into consideration
when installing the hydraulics:
• Thisworkmustbeperformedbyqualiedpersonnel
andelectricalworkmustbeperformedbyaqualied
electrician.
• The operating space must be clean, dry and free from
frost, and designed for the hydraulics in question.
• When working in pump chambers, a second person
must be present for safety reasons. Take the necessary
countermeasures if there is a risk of toxic or suffocating
gases collecting!
• Ensurethatliftingequipmentcanbettedwithoutany
trouble, since this is required for the installation and
dismantling of the hydraulics. It must be possible to
reach the hydraulics safely in their operating and storage
locations using the lifting equipment. The set-down
location must have a solid bearing surface. For trans-
porting the hydraulics, the lifting gear must be secured
to the prescribed attachment points. When using chains,
these must be connected to the attachment point using
a shackle. The lifting gear used must be technically
approved.
• The structural components and foundations must be of
sufcientstabilityinordertoallowtheproducttobe
xedsecurelyandproperly.Theoperatororthesupplier
is responsible for providing the foundations and their
suitability in terms of dimensions, stability and strength!
• Forverticaldrywellinstallation,theremustbeaxation
to the foundation.
• Flangefootarch(Fig.3b)
• Holderwithangeconnectionforthehydraulics
provided by the customer
• Never let the hydraulics run dry. Air pockets are to be
avoided at all costs. Appropriate ventilation systems
must be provided.
• Check that the available consulting documents (installa-
tion plans, layout of the operating space, inlet condi-
tions) are complete and correct.
• Also refer to all regulations, rules and laws for work-
ing with heavy and suspended loads. Wear appropriate
protective clothing.
• Please also observe the applicable national accident
prevention and safety regulations of professional and
trade associations.
5.3.1. Attachment points
To raise and lower the hydraulics, they must be fastened
atthespeciedattachmentpoints.Wedifferentiatehere
betweentheunitandthe“bareshaft”version.
Fig. 2.: Attachment points
A“Bareshaft”version(horizontal)
B Unit (horizontal + vertical)
1 Transport shackle (horizontal)
2 Lifting eye (vertical)
Denition of symbols
Attach here!
Shackle must be used!
Lifting equipment: Chain permitted
Lifting equipment: Wire rope or nylon rope
permitted
Lifting equipment: Transport strap permitted
Use of a hook for attachment is prohibited!
Use of chains as lifting equipment prohibited
The following information must be observed when attaching
the lifting equipment:
Horizontal installation:
• The lifting equipment must be fastened to the transport
shackle by a shackle. Carrying straps, wire ropes and
plastic ropes or chains may be used as lifting equipment.
• The transport shackle must be dismantled after posi-
tioning is complete.
• When attached to the housing parts, the lifting equip-
ment must be fastened in a loop. Chains may not be
used here!
Vertical installation:
• Units for vertical installation are delivered horizontally
andliftedattheliftingeyes(Fig.2,Item2).
• Attach the lifting equipment to all 4 lifting eyes by
means of shackles. Carrying straps, wire ropes and plas-
tic ropes or chains may be used as lifting equipment.

Installation and operating instructions Wilo-RexaBloc RE/Rexa BLOC 19
INSTALLATION English
5.3.2. Maintenance work
After a storage period of more than 6 months, the following
maintenance work must be carried out before installation:
• Rotate impeller
• Check oil in the sealing chamber
Rotate impeller
1. Placethehydraulicshorizontallyonarmsurface.
Make sure that the hydraulics cannot fall over and/or slip!
2. Carefully and slowly reach into the hydraulics housing
through the suction port and rotate the impeller.
WARNING! Sharp edges!
Sharp edges can form on the impeller and the
opening on the suction port. There is a risk of
injury! Wear the necessary protective cloth-
ing, such as protective gloves.
5.3.3. Check oil in the sealing chamber (“Fig. 4.: Screw
plugs”)
The sealing chamber has a separate opening for draining and
llingthesealingchamber.
1. Placethehydraulicshorizontallyonarmsurface.
Make sure that the hydraulics cannot fall over and/or slip!
2. Unscrew screw plug (D+).
3. Place a suitable tank under the screw plug (D-) to collect
theoperatinguid.
4. Unscrewscrewplug(D-)andallowtheoperatinguidto
drain out. If the oil is clear, does not contain any water,
andthequantitymatchesthespecication,itcanbe
reused. If the oil is contaminated, it must be disposed of
inaccordancewiththerequirementsinthe“Disposal”
Section.
5. Clean the screw plug (D-), renew the seal ring and screw
it back in.
6. Pourtheoperatinguidinthroughtheopening(D+).
Notetherecommendedoperatinguidsandlling
quantities, see Section 8!
7. Clean the screw plug (D+), renew the seal ring and screw
it back in.
5.3.4. Stationary dry well installation
In this installation type, the operating space is divided:
collectortankandmachineroom.Theuidiscollectedinthe
collector tank and the hydraulics is installed in the machine
room. The operating space must be blocked out as per the
manufacturer’scongurationorconsultingaid.Thehydrau-
lics is connected to the pipeline system on the suction and
dischargesideatthespeciedpointinthemachineroom.
Thehydraulicsisnotimmersedintheuid.
The pipeline system on the suction and discharge side
must be self-supporting, i.e. it may not be supported by
the hydraulics. In addition, the hydraulics connection to the
pipeline system must be free of stress and vibrations. We
therefore recommend using elastic connection pieces (com-
pensators).
The following operating parameters must be complied with:
• The maximum uid temperature is 70°C.
• Motor cooling–Toensuresufcientmotorcoolingby
the motor fan, the minimum distance to the rear wall
must be complied with. See the operating and mainte-
nance manual of the motor manufacturer!
• Max. ambient temperature – See the operating and
maintenance manual of the motor manufacturer.
The hydraulics is not self-priming so that hydraulics hous-
ing must be completely lled with the uid. Ensure that
there is an appropriate inlet pressure. Air pockets are to be
avoided at all costs. Appropriate ventilation systems must
be provided!
Fig. 3.: Stationary dry well installation
1 Collector tank 6 Compensator
2 Machine room 7 Hydraulics
3 Gate valve inlet 8 Standard motor
4Gate valve discharge
pipeline 9Attachment points for oorxation
5 Non-return valve 10 Flange foot arch
Work steps
1. Installingthehydraulics:about3–5h
• Checkthatthepipelinesystemissecuredrmly.
• Fasten lifting equipment to the corresponding
attachment points and position the hydraulics in the
planned location.
• For horizontal installation, the hydraulics is attached
tothefoundation.(6xxationpoints:4xhydraulics,
2x supports). We recommend using anchor bolts for
thisxation.
• Verticalinstallation;setupthehydraulicsvertically.
• For vertical installation, the hydraulics is screwed to
thepiping(angefootbend).
Notice: The hydraulics is constructed in a “back pull-out”
design. In other words, the motor, bearing housing and
impeller can be removed as a unit without dismantling the
hydraulics housing from the piping. For horizontal installa-
tion, a minimum distance of 500mm must be ensured here
between the motor fan and the rear wall.
• Loosen the lifting gear and remove the transport
shackle from the discharge port.
Keep the transport shackle for later transport!
• Connect the pipeline system on the suction and
discharge side. To ensure that the pipeline system is
connected free of stress and vibrations, we recom-
mend using elastic connection pieces (compensators)
• Route the power supply cables (must be provided by
the customer) in accordance with local requirements.
• Havetheelectricalconnectionsmadebyaqualied
electrician.
2. Install optional accessories, such as alarm switchgear for
detecting moisture.
3. Commissioningthehydraulics:about2–4h
• Asdescribedinthe“Commissioning”section
• Open the slide valves on suction and discharge sides.
• Vent the hydraulics and pipeline system.

20 WILOSE10/2022V05DINA4
English COMMISSIONING
5.4. Electrical connection
RISK of fatal injury due to electrical current!
Improper electrical connections can lead to
fatal electric shock. Electrical connection may
only be carried out by a qualied electrician
approved by the local energy supply company,
in accordance with locally applicable regula-
tions.
NOTICE
Also note all the information regarding electrical
connections in the operating and maintenance
manual for the motor!
• The current and voltage of the mains connection must
be designed in accordance with the information in the
operating and maintenance manual for the motor. See
alsothespecicationsontheratingplateforthemotor.
• The power supply cable must be provided by the
customer. The cable cross-section and chosen routing
option must comply with local standards and require-
ments.
• Any available monitoring devices, e.g. sealing chamber
monitoring, must be connected and tested to ensure
that it is working properly.
• Earth the hydraulics according to the regulations.
Earthing is provided by the motor connection. Alterna-
tively, the hydraulics can be earthed through a separate
connection. The cable cross-section for the protective
earth conductor connection must comply with local
regulations.
5.4.1. Check the monitoring devices before
commissioning
Ifthemeasuredvaluesdeviatefromthespecications,the
monitoring devices may be faulty. Consult Wilo customer
service.
Optional pencil electrode for sealing chamber monitoring
Before the pencil electrode is connected, it must be checked
with an ohmmeter. The following values must be complied
with:
• Thisvaluemustapproach“innity”.Ifthevaluesare
low, there is water in the oil. Please also observe the
instructions of the optional evaluation relay.
5.4.2. Connecting the monitoring devices
Connecting the pencil electrode (available as an option) for
sealing chamber monitoring
• The pencil electrode must be connected via an evalu-
ationrelay.Werecommendthe“NIV101/A”relayfor
this.Thethresholdis30kOhm.Whenthethresholdis
reached, a warning must be given, or the unit must be
switched off.
CAUTION!
If there is only a warning, the hydraulics could
be irreparably damaged by water ingress. We
always recommend switching the hydraulics
off!
5.4.3. Connecting the standard motor
The information for connecting the motor to the mains, the
information concerning existing monitoring devices and
connecting these devices, and concerning possible activation
types can be found in the operating and maintenance manual
of the motor manufacturer!
5.5. Operator responsibilities
5.5.1. Recommended monitoring devices
The hydraulics are driven by a standard motor. Standard
motorsarenotoverow-proof.Wethereforerecommend
using an alarm switchgear to record major leakages. In the
eventofamajordischargeofuid(e.g.faultypiping),an
alarm can be issued and the unit switched off.
6. Commissioning
NOTICE
Also note all the information regarding com-
missioning in the operating and maintenance
manual for the motor!
The“Commissioning”sectioncontainsalltheimportant
instructions for the operating personnel for starting up and
operating the hydraulics.
The following general conditions must always be met and
checked:
• Maximum ambient temperature (see installation and
operating instructions for motor)
• All slide valves on the suction and discharge side are
open
These general conditions must also be checked after a
lengthy period of standstill, and any defects detected must
be remedied!
Always keep this manual either by the hydraulics or in a place
specially reserved for it, where it is accessible for the entire
operating personnel at all times.
In order to prevent damage or serious injury when com-
missioning the hydraulics, the following points must be
observed:
• Commissioning of the hydraulics may only be carried out
byqualiedandtrainedpersonnelinaccordancewith
the safety instructions.
• All persons working on or with the hydraulics must have
received, read and understood this operating and main-
tenance manual.
• All safety devices and emergency cut-outs are con-
nected and have been checked to ensure that they work
properly.
• Electrical engineering and mechanical adjustments must
becarriedoutbyqualiedpersonnel.
• Thehydraulicsissuitableforuseunderthespecied
operating conditions.
• When working in pump chambers, a second person must
bepresent.Ifthereisariskoftoxicgasesforming,suf-
cient ventilation must be ensured.