Wilo Wilo-Rexa FIT V06DA-110/EAD1-2-T0015-540-P User manual

6063547 Ed03-10/2014 WH
Pioneering for You
Wilo-Rexa FIT
de Einbau- und Betriebsanleitung
en Installation and operating instructions
fr Notice de montage et de mise en service
es Instrucciones de instalación y funcionamiento
pt Manual de Instalação e funcionamento
nl Inbouw- en bedieningsvoorschriften
sv Monterings- och skötselanvisning
 Asennus- ja käyttöohje
hr Upute za ugradnju i uporabu
pl Instrukcjamontażuiobsługi
ru Инструкцияпомонтажуиэксплуатации
lt Montavimo ir naudojimo instrukcija
ro Instrucţiunidemontajşiexploatare

Fig. 2
Fig. 3Fig. 1
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6
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5
6
6
33
4
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7a
1
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5
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6
3
4
2
S1
S2/S3
8
7b
7a
d
AA
min. 1 x d
A
d
min.
0,3 x d
B

Fig. 6 Fig. 7/8
Fig. 5Fig. 4
1
4
8
3
36
5
2
7
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U2
bu
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M 1~
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W
5 1 2
V
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250 V (AC); 2,5 A; cos φ = 1
1

InstallationandoperatinginstructionsWilo-RexaFIT 29
English
1. Introduction 30
1.1. About this document 30
1.2. Personnelqualications 30
1.3. Copyright 30
1.4. Subject to changes proviso 30
1.5. Warranty 30
2. Safety 31
2.1. Instructions and safety instructions 31
2.2. General safety 31
2.3. Electrical work 32
2.4. Safety and monitoring devices 32
2.5. Conduct during operation 32
2.6. Fluids 32
2.7. Sound pressure 33
2.8. Standards and guidelines used 33
2.9. CE marking 33
3. Product description 33
3.1. Intendeduseandeldsofapplication 33
3.2. Set-up 33
3.3. Operatingmodes 34
3.4. Technicaldata 34
3.5. Typekey 35
3.6. Scopeofdelivery 35
3.7. Accessories 35
4. Transportandstorage 35
4.1. Delivery 35
4.2. Transport 35
4.3. Storage 35
4.4. Returndelivery 36
5. Installation 36
5.1. General 36
5.2. Installationmethods 36
5.3. Installation 36
5.4. Dry-running protection 39
5.5. Electrical connection 40
5.6. Motorprotectionandactivationtypes 41
6. Commissioning 41
6.1. Electrical system 42
6.2. Rotation control 42
6.3. Levelcontrol 42
6.4. Commissioning 42
6.5. Safety rules during operation 43
7. Decommissioning/disposal 43
7.1. Temporarydecommissioning 43
7.2. Decommissioning for maintenance work or stor-
age 43
7.3. Removal 44
7.4. Return delivery/storage 44
7.5. Disposal 44
8. Maintenance and repair 44
8.1. Operatingmaterials 45
8.2. Maintenance intervals 45
8.3. Maintenancework 46
9. Troubleshootingandpossiblesolutions 46
10. Appendix 48
10.1. Spare parts 48

30 WILOSE10-2014V05DINA4
English INTRODUCTION
1. Introduction
1.1. About this document
Thelanguageoftheoriginaloperatinginstruc-
tionsisGerman.Allotherlanguagesofthese
instructions are translations of the original oper-
ating instructions.
Thismanualisdividedintoindividualsections,
which are listed in the table of contents. Each
sectionhasaheadingwhichclearlydescribesits
content.
A copy of the EC declaration of conformity is
acomponentoftheseoperatinginstructions.
Ifatechnicalmodicationismadeonthedesigns
named there without our agreement, this decla-
ration loses its validity.
1.2. Personnel qualications
All personnel who work on or with the pump 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.
Operatingandmaintenancepersonnelmustalso
observe national accident prevention regulations.
It must be ensured that personnel have read and
understood the instructions in this operating and
maintenancehandbook;ifnecessary,thismanual
must be ordered from the manufacturer in the
required language.
Thispump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super-
visedbyapersonresponsiblefortheirsafetyand
receive instructions from this person on how to
use the pump.
Children must be supervised in order to ensure
that they do not play with the pump.
1.3. Copyright
Thisoperatingandmaintenancemanualhasbeen
copyrightedbythemanufacturer.Theoperating
and maintenance manual is intended for use by
installation, operating and maintenance person-
nel. It contains technical regulations and drawings
which may not be reproduced or distributed,
either completely or in part, or used for purposes
ofcompetitionwithouttheexpressconsentof
themanufacturerorsharedwithothers.Theillus-
trations used may differ from the original and are
onlyintendedasanexemplaryrepresentationof
the pumps.
1.4. Subject to changes proviso
Themanufacturerreservestherighttomake
technicalmodicationstounitsorcomponents.
Thisoperatingandmaintenancemanualrefersto
the pump shown on the title page.
1.5. Warranty
Ingeneral,thespecicationsinthecurrent"gen-
eraltermsandconditions"applyfor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de-
fects found in the pumps it sells, provided that
the defects meet one or more of the following
requirements:
• Thedefectsarecausedbythematerialsused
or the way the product was manufactured or
designed.
• Thedefectswerereportedinwritingtotheman-
ufacturer within the agreed warranty period.
• Thepump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"generaltermsandconditions".
Any deviations must be contractually agreed.
1.5.3. Spare parts, attachments and modications
Onlygenuinesparepartsfromthemanufacturer
may be used for repairs, replacements, attach-
mentsandmodications.Unauthorizedadd-ons
andmodicationsortheuseofnon-originalspare
parts can seriously damage the pump 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 by trained per-
sonnel.Thepumpmayonlybeoperatedifitisin
perfect working order.
In general, repairs should only be carried out by
Wilo customer service.
1.5.6. Disclaimer
No warranty claims will be accepted or liability
will be assumed for pump damage if any of the
followingitemsapply:
• Themanufacturerdeemsthatinformationpro-
videdbytheoperatororcustomerisinsufcient
or incorrect
• Non-compliance with safety instructions and
workinginstructionsasspeciedinthisoperating
and maintenance manual
• Improper use
• Incorrect storage and transport
• Improper assembly/dismantling
• Insufcientmaintenance
• Incorrect repairs
• Inadequate construction site or construction work
• Chemical,electrochemicalandelectricalinu-
ences
• Wear

InstallationandoperatinginstructionsWilo-RexaFIT 31
SAFETY English
Thismeansthemanufacturer’sliabilityexcludes
all liability for personal injury, material damage or
nanciallosses.
2. Safety
Thissectionlistsallthegenerallyapplicable
safety instructions and technical information.
Inaddition,alltheothersectionscontainspecic
safety instructions and technical information.
Allinstructionsandinformationmustbeobserved
and followed during the various phases of the
pump’slifecycle(installation,operation,mainte-
nance,transportetc.)!Theend-userisrespon-
sible for ensuring that all personnel follow these
instructions and guidelines.
2.1. Instructions and safety instructions
Thismanualusesinstructionsandsafetyin-
structions for preventing injury and damage to
property.Toclearlyidentifythemforpersonnel,
the instructions and safety instructions are dis-
tinguished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 (instruction without symbol)
Substantial property damage can occur. Irrepa-
rable damage is possible!
• Safety instructions that refer to personal injury
appear in black and are always accompanied by
asafetysymbol.Danger,prohibitionorinstruc-
tion symbols are used as safety symbols.
Example:
Dangersymbol:Generalhazard
Dangersymbol,forexample,electricalcurrent
Prohibitionsymbol,forexample,Keepout!
Instructionsymbol,forexample,wearprotec-
tive clothing
Thesafetysymbolsusedconformtothegener-
ally applicable directives and regulations, such
asDINandANSI.
• Safety instructions that only refer to materi-
al damage are printed in grey, without safety
symbols.
2.2. General safety
• When installing or removing the pump, never
workaloneinroomsandsump.Asecondperson
must always be present.
• Thepumpmustalwaysbeswitchedoffbefore
any work is performed on it (assembly, disman-
tling,maintenance,installation).Thepumpmust
be disconnected from the electrical system and
securedagainstbeingswitchedonagain.Allro-
tatingpartsmusthavecometoastop.
• Theoperatorshouldinformhis/hersuperior
immediately should any defects or irregularities
occur.
• Theend-usermustshutdowntheequipmentim-
mediately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
insulation.
• Toolsandotherobjectsshouldbekeptintheir
designated places to ensure they can be used
safely.
• Sufcientventilationmustbeprovidedinen-
closed rooms.
• When welding or working with electronic devices,
makesurethereisnoriskofexplosion.
• Onlyuseliftinggearwhichislegallydenedas
suchandofciallyapproved.
• Theliftinggearmustbekeptsafelyandmustbe
suitable for the conditions of use (weather, hook-
ing 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also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(forexample,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carriedout
outdoors, it must be cancelled if the weather
conditions worsen.
These instructions must be strictly observed.
Non-observance can result in injury or substan-
tial material damage.

32 WILOSE10-2014V05DINA4
English SAFETY
2.3. Electrical work
ELECTRICAL hazard!
Incorrectly performed electrical work can
result in fatal injury! This work may only be
carried out by aqualied electrician.
BEWARE of moisture!
Moisture penetrating the cable will damage
both the pump and the cable. Never immerse
the cable end in uid and always protect it
from moisture. Unused wires must be insu-
lated!
Ourpumpsareoperatedwithalternating
orthree-phasecurrent.Thegoverningna-
tional directives, standards and regulations
(e.g.VDE0100)aswellastherequirementsofthe
local energy supply company must be observed.
Thepersonoperatingthepumpmustknow
where it is supplied with power and how to cut
offthesupply.Amotorprotectionswitchmust
be installed by the customer for three-phase AC
motors.Itisadvisabletoinstallaresidual-current
device(RCD).Ifthereisapossibilitythatpeople
can come into contact with the pump and the
uid(forexampleonconstructionsites),the
connection must be equipped with an additional
residual-current device (RCD).
Thesectionentitled“Electricalconnection”
must be observed when connecting the product.
Thetechnicalspecicationsmustbeobserved
strictly.Ourpumpsmustalwaysbegrounded.
If the pump has been switched off by aprotec-
tive device, it must not be switched on again
until the error has been corrected.
When the pump is connected to the electrical
control panel, particularly when electronic devices
such as soft start-up control or frequency con-
vertersareused,theswitchgearmanufacturer’s
specicationsmustbefollowedtocomplywith
the electromagnetic compatibility (EMC) re-
quirements. Special separate shielding measures
(e.g.shieldedcables,lters,etc.)maybeneces-
sary for the power supply and control cables.
Connections may only be made providing the
switchgears meet the harmonised EU standards.
Mobile radio equipment may cause malfunc-
tions in the system.
BEWARE of electromagnetic radiation!
Electromagnetic radiation can pose afatal
risk for people with cardiac stimulators. Put
up appropriate signs and make sure anyone
affected is aware of the danger!
2.4. Safety and monitoring devices
Thepumpsareequippedwithathermalwinding
monitor.Thepumpisswitchedoffifthemotor
gets too hot during operation.
Thisdevicemustbeconnectedbyanelectrician
and checked to ensure that it functions correctly
before commissioning.
Personnel must be informed about the built-in
systems and how they work.
CAUTION!
The pump should not be operated if the wind-
ing monitor has been removed, is damaged
and/or does not function!
2.5. Conduct during operation
When operating the pump, always follow the
locally applicable laws and regulations for work
safety, accident prevention and handling elec-
trical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.
Due to their design, centrifugal pumps have
rotating parts that are easily accessible. Depend-
ing on the operating condition, sharp edges can
develop on these parts.
WARNING: Danger of crushing and amputation
of limbs!
Sharp edges can form on the rotating parts in
the hydraulics. These can result in crushing
and amputation of limbs.
• Never reach into the hydraulics when the
machine is in operation.
• Before performing maintenance or repairs,
switch off the pump, disconnect it from the
mains and secure it against being switched on
again without authorization.
• Always allow the rotating parts to come to
astandstill!
2.6. Fluids
Eachuiddiffersinrespectofcomposition,cor-
rosiveness, abrasiveness, dry matter content and
in many other aspects. Generally, our pumps can
be used for many applications. Please note that if
requirements change (density, viscosity or general
composition), this can also affect many parame-
ters of the pump.
Whenusingorreplacingthepumpinadifferent
uid,observethefollowingpoints:
• Theuidcanbecontaminatedbyoilfromthe
sealing chamber if the mechanical shaft seal is
defective.
Use with potable water is not permitted!
• Pumps that have been operated in dirty waste
water must be cleaned thoroughly before being
usedforotheruids.
• Pumps that have been operated in sewage water
containingfaecesand/oruidsthatarehazardous
to health must be decontaminated before being
usedwithotheruids.
Clarication must be sought as to whether the
pump can be used at all with another uid.

InstallationandoperatinginstructionsWilo-RexaFIT 33
PRODUCTDESCRIPTION English
2.7. Sound pressure
Dependingonthesizeandperformance(kW)
ofthepump,ithasasound-pressurelevelof
approximately70dB(A)to90dB(A)during
operation.
However, the actual sound-pressure level
dependsonseveralfactors.Theseinclude,for
example,theinstallationdepth,installation,
xationofaccessoriesandpiping,thedutypoint,
immersion depth, etc.
We recommend that the end-user takes an
additional measurement at the workplace once
the pump is running at its duty point and under all
operating conditions.
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!
2.8. Standards and guidelines used
ThepumpissubjecttovariousEuropeandi-
rectives 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
pump.
2.9. CE marking
TheCEmarkingisattachedtotheratingplate.
3. Product description
Thepumpismanufacturedwithgreatcareandis
subjecttoconstantqualitycontrols.Trouble-free
operation is guaranteed if it is installed and main-
tained correctly.
3.1. Intended use and elds of application
ELECTRICAL hazard
When using the pump in swimming pools or
other basins that can be entered, there is
arisk of electrocution. Note the following:
• Use is strictly forbidden if there are people in
the basin!
• If there are no people in the basin, protec-
tive measures must be taken according to
DINVDE0100-702.46 (or the appropriate
national regulations).
DANGER - explosive uids!
It is strictly prohibited to pump explosive u-
ids (gasoline, kerosene, etc.). Thepumps are
not designed for these uids!
Wilo-RexaFIT…submersiblemotorpumpsare
suitableforintermittentpumpingof:
• Drainage and sewage
• Sewage containing faeces
• Sludgeswithupto8%drymatter(depend-
ing on type) in domestic and site drainage in
accordance with EN 12050 (having regard to the
regional-specicregulationsandinstructions,
e.g.DINEN12050-1)andfromsumpsandtanks.
Thesubmersiblemotorpumpsmustnotbeused
forpumping:
• Potable water
• Fluidscontaininghardcomponentssuchasstone,
wood, metal, sand etc.
• Highlyammableandexplosiveuids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-Rexapumpsaresubmersiblesewage
pumps that can be operated vertically in sta-
tionary or portable wet well installation and in
stationary dry well installation.
Fig. 1.: Description
1 Cable 5 Hydraulic housing
2 Handle 6Suction connection
3 Motor housing 7 Pressure connection
4 Seal housing
3.2.1. Hydraulics
Rotodynamichydraulicswithvorteximpellerand
connectiononthepressuresideasahorizontal
angeconnection.
The hydraulics are not self-priming, in other
words, the uid must ow in either automati-
cally or with supply pressure.
3.2.2. Motor
In the AC or three-phase current version, glanded
motorsareusedasthemotors.Themotoris
cooledbytheuidaroundit.Thewasteheatis
transferreddirectlytotheuidviathemotor
housing.Themotormayemergeduringopera-
tion.
NOTE
When the motor is non-immersed, observe and
complywiththespecicationsfor"Non-im-
mersedoperatingmode".
With single-phase AC motors, the operating
capacitor is integrated in the motor.
Theconnectioncablehasalengthof10mandis
availableinthefollowingversions:
• Single-phaseversion:
• Cable with shockproof plug
• Cablewithshockproofplugandattachedoat
switch
• Three-phaseversion:
• Bare cable end
• CablewithCEEplugandattachedoatswitch

34 WILOSE10-2014V05DINA4
English PRODUCTDESCRIPTION
3.2.3. Monitoring equipment
• Thermal motor monitor:
Thethermalmotormonitorprotectsthemotor
windingfromoverheating.Forpumpswithsin-
gle-phase AC motors this is built-in and switches
automatically. I.e. if the motor is switched off due
to overheating and then cools down it is auto-
matically switched on again. Bimetallic strips are
used for this as standard.
Themotorcanalsobettedwithanexternal
pencil electrode to monitor the sealing cham-
ber.Thissignalsifthereiswateringressintothe
sealing chamber through the mechanical seal on
theuidside.
3.2.4. Sealing
Thesealfortheuidandthemotorcompartment
ismadeviatwomechanicalshaftseals.Theseal-
ing chamber between the mechanical shaft seals
islledwithecologicallysafemedicinalwhiteoil.
3.2.5. Materials
• Motorhousing:1.4301
• Hydraulichousing:EN-GJL-250
• Impeller:EN-GJL-250
• Shaftend:1.4021
• Staticseals:NBR
• Sealing
• Onpumpside:SiC/SiC
• Onmotorside:C/MgSiO4
3.2.6. Float switch
Inthe"A"versionthepumpisequippedwith
aoatswitch.Theoatswitchisdirectlycon-
nected to the motor.
Byusingtheoatswitchitispossibletosetup
alevelcontrol,atwhichthepumpisautomatically
switched on and off.
3.2.7. Attached plug
Inthe"P"and"F"version,ashockproofplugis
attachedforsingle-phaseACmotorsandaCEE
plug is attached for three-phase AC motors.
Theseplugsaredesignedforuseincommercially
available shock-proof or CEE sockets and are not
overow-proof.
BEWARE of moisture!
Ingress of moisture will result in damage to
the plug. Never immerse the plug in uid and
always protect it from moisture.
3.3. Operating modes
3.3.1. Operating mode S1 (permanent operation)
Thepumpcanoperatecontinuouslyattherated
loadwithoutexceedingthepermissibletemper-
ature.
3.3.2. Operating mode S2 (short-term operation)
Themaximumoperatingperiod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.
3.3.3. Operating mode S3 (intermittent operation)
Thisoperatingmodedenesacombination
of periods of operation and standstill. With S3
operation, the values given are always calculated
basedonaperiodof10minutes.
Examples
• S320%
Operation20%of10min=2min/standstill
80%of10min=8min
• S33min
Operation3min/standstill7min
Iftwovaluesarespecied,theyarerelatedto
eachother,e.g.:
• S35min/20min
Operation5min/standstill15min
• S325%/20min
Operation5min/standstill15min
3.4. Technical data
General data
Mainsconnection[U/f]: See rating plate
Power consumption [P1]: See rating plate
Rated motor power [P2]: See rating plate
Maximumdeliveryhead[H]: See rating plate
Maximumvolumeow[Q]: See rating plate
Activationtype[AT]: See rating plate
Fluidtemperature[t]: 3…40°C
Protectionclass: IP68
Insulationclass[Cl.]: F
Speed[n]: See rating plate
Max.immersiondepth: 20 m
Explosionprotection: -
Operating modes
Immersed[OTS]: S1
Non-immersed[OTE]: S215min,S310%*
Switching frequency
Recommended: 20/h
Maximum: 50/h
Free ball passage
FITV05-…: 50 mm
FITV06-…: 65mm
FITV08-…: 80 mm
Suction connection:
FIT…05-…: DN 50, PN 10
FIT…06-…: DN65,PN10
FIT…08-…: DN 80, PN 10
Pressure connection:
FIT…05-…: DN 50/Rp2, PN 10
FIT…06-…: DN65/80,PN10
FIT…08-…: DN 80/100, PN 10

InstallationandoperatinginstructionsWilo-RexaFIT 35
TRANSPORTANDSTORAGE English
*OperatingmodeS325%ispermissibleifthe
necessary motor cooling is guaranteed by com-
plete immersion for at least 1 minute before the
motor is switched back on again!
3.5. Type key
Example: Wilo-Rexa
FIT V06DA-110/EAD1-2-T0015-540-P
FIT Series
VImpeller shape
V=vorteximpeller
06
Pressure connection size
05=DN50
06=DN65/80
08=DN80
D
Hydraulic version
D=suctionsidedrilledacc.toDIN
N=suctionsidedrilledacc.toNorthAmerican
Standard (ANSI)
A"Hydraulic"materialversion
A=standardtype
110 Typeofhydraulics
E
Motor version
E=drymotor
R=reduced-powerglandedmotor
A"Motor"materialversion
A=standardtype
DSeal version
D=2independentmechanicalshaftseals
1IEefciencyclass,e.g.:1=IE1(basedon
IEC6003430)
-notEx-rated
2Number of poles
T
Mains connection version
M=1~
T=3~
0015 /10=ratedpowerP2in kW
5
Frequency
5=50Hz
6=60Hz
40 Key for rated voltage
P
Additional electrical equipment
O=withbarecableend
A=withoatswitchandplug
P=withplug
3.6. Scope of delivery
• Pumpwith10mcable
• Single-phase version with
• Shockproof plug
• Floatswitchandshockproofplug
• Three-phaseversionwith
• bare cable end
• FloatswitchandCEEplug
• Installation and operating instructions
3.7. Accessories
• Cable lengths up to 30 m (single-phase version)
or50m(three-phaseversion)inxedlength
incrementsof10m
• Suspension unit
• Pump foot
• Externalpencilelectrodeforsealingchamber
control
• Levelcontrols
• Fixingaccessoriesandchains
• Switchgears, relays and plugs
4. Transport and storage
4.1. Delivery
Ondelivery,checkimmediatelythattheship-
ment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. Claims made after this date cannot be
recognised. Damage to parts must be noted on
the freight documentation.
4.2. Transport
Onlytheappropriateandapprovedfastening
devices, transportation and lifting equipment may
beused.Thesemusthavesufcientload-bearing
capacity to ensure that the pump can be trans-
portedsafely.Ifchainsareusedtheymustbe
secured against slipping.
Thepersonnelmustbequaliedforthetasksand
must follow all applicable national safety regula-
tions during the work.
Thepumpisdeliveredbythemanufactureror
shippingagencyinsuitablepackaging.Thisnor-
mally precludes the possibility of damage occur-
ringduringtransportandstorage.Thepackaging
shouldbestoredinasafeplaceforreuseifthe
product is frequently used at different locations.
4.3. Storage
Newly supplied pumps are prepared so that they
canbestoredforatleast1year.Thepumpshould
be cleaned thoroughly before it is put into tem-
porary storage.
Thefollowingshouldbetakenintoconsideration
forstorage:
• Placethepumponarmsurfaceandsecureit
against slipping and falling over. Submersible
sewage pumps are stored horizontally.
DANGER due to falling over!
Never set the pump down if unsecured. Ifthe
pump falls over, this may lead to injuries!
• Ourpumpscanbestoredtomax.15°C.Thestor-
ageareamustbedry.Werecommendafrost-pro-
tectedroomforstoragewithatemperature
between5°Cand25°C.
• Thepumpisnotallowedto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 pressure connections must be sealed
securely to prevent contamination getting in.
• All power supply cables must be protected
against kinking, damage and moisture ingress.

36 WILOSE10-2014V05DINA4
English INSTALLATION
ELECTRICAL hazard!
Damaged power supply cables can cause fatal
injury! Defective cables must be replaced by
aqualied electrician immediately.
BEWARE of moisture!
Moisture penetrating the cable will damage
both the pump and the cable. Never immerse
the cable end in uid and always protect it
from moisture.
• Thepumpmustbeprotectedfromdirectsunlight,
heat, dust, and frost. Heat or frost can cause seri-
ous damage to impellers and coatings!
• Theimpellersshouldbecheckedatregularinter-
vals.Thispresentsjammingofthebearingsandit
renewsthelmoflubricationonthemechanical
seal.
BEWARE of sharp edges!
Sharp edges can form on the impellers and
hydraulic openings. There is arisk of injury!
Wear the necessary protective clothing, such
as protective gloves.
• Ifthepump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 immedi-
ately. Only an intact coating fulls its intended
purpose.
Please note 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 nec-
essary. Consult the manufacturer for details.
4.4. Return delivery
Pumps that are returned to the factory must be
properlypackaged.Thismeansthatimpurities
have been removed from the pump and that it has
beendecontaminatedifusedwith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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 seri-
ous injury during installation, the following points
mustbeobserved:
• Installation work – assembly and installation of
thepump–mayonlybecarriedoutbyqualied
persons.Thesafetyinstructionsmustbefollowed
at all times.
• Thepumpmustbeinspectedfortransportdam-
age before any installation work is carried out.
5.1. General
Forplanningandoperationoftechnicalsewage
systems, observe the pertinent local regulations
and directives for sewage technology (such as
those of the German Association for Water,
Wastewater and Waste).
Note that pressure surges can occur, in particu-
lar with stationary installations where water is
pumped with longer discharge pipes (especially
with steady ascents or steep terrain).
Pressure surges can result in destruction of the
pump/systemandnoisepollutionduetoap
knock. Pressure surges can be prevented by ap-
plying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ushedwithpure
water to prevent encrustation and avoid related
breakdowns later on.
If you are using level control, make sure that the
minimum water coverage is present. Air pockets
in the hydraulic housing or piping system must be
avoided at all costs and must be removed using
asuitableventilationsystemand/or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
suspension unit
• Vertical portable wet well installation with pump
foot
• Vertical stationary dry well installation
5.3. Installation
DANGER of 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
necessary 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qualied
person and electrical work must be carried out by
an electrician.
• Thecollectortankmustbeclean,freeofcoarse
solids, dry, frost-free and, if necessary, de-
contaminated. 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

InstallationandoperatinginstructionsWilo-RexaFIT 37
INSTALLATION English
poisonousorasphyxiatinggasesforming,the
necessary precautions must be taken.
• Depending on the ambient conditions in opera-
tion, the unit planner must select the sump size
and motor cooling time accordingly.
• Ensurethatliftingequipmentcanbetted
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 locations using the lifting equip-
ment.Themachinemustbepositionedonarm
bearingsurface.Fortransportingthepump,the
load-carrying equipment must be secured to the
lifting eyelets provided. When using chains, they
mustbeconnectedwithashackletothelifting
eyeletsorthecarrying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/dismantling are possible at all times.
Thepumpmustneverbecarriedordraggedby
the power supply cable. Check whether the cable
present is long enough for its cross-section and
its installation type.
• When using switchgears, the corresponding
protectionclassmustbeobserved.Ingeneral,
switchgears are to be installed outside poten-
tiallyexplosiveareasinsuchawaythattheyare
protectedfromooding.
• Structural components and foundations must
besufcientlystabletoallowtheproducttobe
anchoredsecurelyandfunctionally.Theoperator
or the supplier is responsible for the provision of
the foundations and their suitability in terms of
dimensions, stability and strength!
• If the motor housing is to be taken out of the
uidduringoperation,theoperatingmodefor
non-immersed operation should be followed.
To keep dry motors sufciently cooled in S3
mode, they must be ooded completely before
being switched back on if the motor has been
taken out of the uid!
• Neverletthepumprundry.Thewaterlevelmust
neverfallbelowtheminimum.Therefore,we
recommendinstallingalevelcontrolsystemor
adry-runningprotectionsystemwherethereare
great variations in the level.
• Useguideanddeectorplatesfortheuidintake.
Ifthewaterjetreachesthesurfaceofthewater,
airwillbeintroducedintotheuid,whichcan
accumulateinthepipesystem.Thiscanresultin
inadmissible operating conditions and to deacti-
vation of the entire system.
• Check that the available planning documentation
(installation plans, layout of the collector tank,
intake ratios) is complete and correct.
• Please observe all regulations, rules and legal
requirements for working with and underneath
heavy suspended loads. Wear appropriate protec-
tive clothing/equipment.
• Please also observe the applicable national acci-
dent prevention regulations and trade association
safety provisions.
5.3.1. 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 level in the sealing chamber
Rotate impeller
1. Positionthepumphorizontallyonarmsurface.
Make sure that the pump cannot fall over and/
or slip.
2. Carefully and slowly reach into the hydraulics
housing from below and rotate the impeller.
BEWARE of sharp edges!
Sharp edges can form on the impellers and
hydraulic opening. There is arisk of injury!
Wear the necessary protective clothing, such
as protective gloves.
Check oil level in sealing chamber
Thesealingchamberhasaholefordrainingand
llingthechamber.
1. Positionthepumphorizontallyonarmsurface
with the screw plug facing upward.
Make sure that the pump cannot fall over and/
or slip.
2. Unscrewthescrewplug(seeFig.7).
3. Theoilshouldreachuptoabout1cmbelowthe
hole for the screw plug.
4. If there is not enough oil in the sealing chamber,
topitup.Todoso,followtheinstructionsunder
"Oilchange"inthe"Maintenanceandrepair"
chapter.
5. Clean the screw plug, replace the joint ring, if
necessary, and screw it back in.
5.3.2. Stationary wet well installation
A suspension unit must be installed for wet
wellinstallation.Thismustbeorderedfromthe
manufacturerseparately.Thepipesystemonthe
pressure side is connected to this.
The connected pipe system must be self-sup-
porting, i.e. it may not be supported by the
suspension unit.
Thecollectortankmustbelaidoutsothatthe
suspension unit can be installed and operated
withoutdifculty.
If the motor emerges during operation, the
following operating parameters must be strictly
observed.
• Themax. uid temperature and ambient tem-
perature is 40°C.
• Detailsfor"Non-immersedoperatingmode"

38 WILOSE10-2014V05DINA4
English INSTALLATION
Fig. 2.: Wet well installation
1 Suspension unit 6 Liftinggear
2 Non-return valve 7a Min. water level for
immersed operation
3 Gate valve 7b
Min. water level for
non-immersed oper-
ation
4 Pipe elbow 8 Impact protection plate
5Guide pipe (to be pro-
vided by the customer!) 9 Inlet
A Minimum distances in parallel operation
B Minimum distances in alternating operation
Clearance "A"
DN 50 308 mm
DN65 385 mm
DN 80 615mm
DN 100 615mm
Work steps
1. Installationofthesuspensionunit:about3-6h
(please see the installation and operating instruc-
tions for the suspension unit).
2. Preparingthepumpforoperationonasuspension
unit:about1-3h
(please see the operating manual for the suspen-
sion unit).
3. Installingthepump:about3-5h
• Checkthatthesuspensionunitisrmlyxed
and functions properly.
• Secure the lifting equipment to the pump with
the shackle, lift the pump and then lower slow-
ly on to the guide pipes in the collector tank.
• Hold the power supply cables slightly taut
when lowering.
• When the pump is connected to the suspension
unit, make sure that the power supply cables
are secured adequately against falling off and
damage.
• Have the electrical connections made by
aqualiedelectrician.
• Thepressureconnectionissealedbyitsown
weight.
4. Installing optional accessories, such as dry-run-
ning protection or level controls.
5. Startingupthepump:about2-4h
• As described in the “Commissioning” section
• Fornewinstallation:Floodthecollectortank
• Vent the pressure pipe.
5.3.3. Portable wet well installation
In this installation type, the pump has to be
equippedwithapumpfoot(availableasanop-
tion).Thisisattachedtothesuctionportanden-
surestheminimumgroundclearanceandasecure
footingifplacedonasolidbearingsurface.Inthis
version, the pump can be positioned anywhere in
theoperatingspace.Ifusedinanoperatingspace
withasoftbearingsurface,ahardbasemustbe
usedtopreventsinking.Apressurehoseiscon-
nected on the pressure side.
If operated for longer periods of time in this in-
stallation type, the pump must be fastened to the
oor.Thispreventsvibrationandensuresquiet
and low-wearing running.
If the motor emerges during operation, the
following operating parameters must be strictly
observed.
• Themax. uid temperature and ambient tem-
perature is 40°C.
• Detailsfor"Non-immersedoperatingmode"
BEWARE of burns!
The housing parts can heat up to well above
40°C. There is arisk of burns! After switch-
ing it off, let the pump cool down to ambient
temperature.
Fig. 3.: Portable installation
1Load-carryingequip-
ment 5 Storz hose coupling
2 Pump foot 6Pressure hose
3
Pipe elbow for hose
connection or Storz
pipe coupling
7a Min. water level for
immersed operation
4 Storz pipe coupling 7b
Min. water level for
non-immersed oper-
ation
Work steps
1. Preparingpumps:about1h
• Install the pump foot on the suction connec-
tion.
• Install the pipe elbow on the pressure connec-
tion.
• Fastenthepressurehosetothepipeelbow
withahoseclip.
Alternatively,aStorzpipecouplingcanbe
installedonthepipeelbowandaStorzhose
coupling can be installed on the pressure hose.
2. Installingthepump:about1-2h
• Positionpumpininstallationlocation.Ifneces-
sary, secure lifting equipment to the pump with
ashackle,liftthepumpandthenlowertothe
intended location (sump, pit).
• Checkthatthepumpisverticalandonasolid
bearing surface. Avoid sinking.
• Route the power supply cable so it cannot be
damaged.
• Have the electrical connections made by
aqualiedelectrician.
• Route the pressure hose so that it is not dam-
agedandfastenitatcertainpoints(e.g.out-
ow).
RISK of pressure hose becoming separated!
Uncontrolled separation or movement of the
pressure hose can result in injuries. Secure the
pressure hose appropriately. Prevent buckling
of the pressure hose.

InstallationandoperatinginstructionsWilo-RexaFIT 39
INSTALLATION English
3. Startingupthepump:about1-3h
• As described in the “Commissioning” section
5.3.4. Stationary dry well installation
In this installation type, the operating space is di-
vided:collectortankandmachineroom.Theuid
is collected in the collector tank and the pump
isinstalledinthemachineroom.Theoperating
space must be blocked out as per the manufac-
turer'scongurationorplanningguide.Thepump
is connected to the suction- and pressure-side
pipesystematthespeciedpointinthemachine
room.Thepumpitselfisnotimmersedinthe
uid.
Thesuction-andpressure-sidepipesystemmust
be self-supporting, i.e. it may not be supported
bythepump.Inaddition,thepumpconnection
to the pipe system must be free of stress and
vibrations. We therefore recommend using elastic
connection pieces (compensators).
Thefollowingoperatingparametersmustbe
observed for dry well installation.
• Themax. uid temperature and ambient tem-
perature is 40°C.
• Detailsfor"Non-immersedoperatingmode"
The pump is not self-priming so that hydraulics
housing must be completely lled with the u-
id. Theminimum level in the collector tank must
be at the same height as the upper edge of the
hydraulics housing.
BEWARE of burns!
The housing parts can heat up to well above
40°C. There is arisk of burns! After switch-
ing it off, let the pump cool down to ambient
temperature.
Fig. 4.: Stationary dry well installation
1 Collector tank 5 Compensator
2 Machine room 6Pump
3 Gate valve 7 Min. water level
4 Non-return valve 8 Dry-running protection
Work steps
1. Installingthepump:about3-5h
• Checkthatthepipesystemissecuredrmly.
• Secure lifting equipment to the pump with
ashackle,liftthepumpandthenlowerslowly
on to the pipe system.
• When lowering the pump, take care of the
power supply cables.
• When the pump is resting on the piping, fasten
the pump to the pipe system on the suction
and pressure sides.
• Route the power supply cables in accordance
with local requirements.
• Have the electrical connections made by
aqualiedelectrician.
2. Installing optional accessories, such as dry-run-
ning protection or level controls.
3. Startingupthepump:about2-4h
• As described in the “Commissioning” section
• Openslidevalvesonsuctionandpressuresides.
• Vent the pressure pipe.
5.3.5. Level control
Filllevelscanbedeterminedusingthelevel
control system, meaning the pump is switched on
andoffautomatically.Thelllevelcanberecord-
edusingoatswitches,pressureandultrasound
measurements or electrodes.
Notethefollowinginformation:
• Whenusingoatswitches,ensurethattheycan
move freely in the operating area!
• Thewaterlevelmustnotfallbelowtheminimum!
• Themaximumswitchingfrequencymaynotbe
exceeded!
• Ifthelllevelsuctuatestrongly,thenalevel
control should be made on two test points as
standard.Thismeanslargerdifferentialgapsare
reached.
Installation
The"A"versionoftheFITseriesisequippedwith
aoatswitchforlevelmeasurement.Inthiscon-
gurationacontactisopenedorcloseddepend-
ingontheangleofinclinationoftheoatswitch.
Theswitchinglevelisdeterminedbythecable
lengthoftheoatswitch.
Whenusingaseparatelevelcontroldevice,please
refer to the installation and operation instruc-
tions supplied with the level control device when
installing it.
Observe the information on the maximum
switching frequency and the minimum water
level!
5.4. Dry-running protection
Toensurethenecessarycooling,thepumpmust
be immersed when in operation, depending on
theoperatingmode.Inaddition,makesurethat
no air enters the hydraulics housing.
Thepumpmustthereforealwaysbeimmersed
intheuiduptothetopedgeofthehydraulic
housing or, if applicable, up to the top edge of
themotorhousing.Foroptimumoperational
reliability,werecommendinstallingadry-running
protection system.
Correctrunningisensuredbyoatswitchesor
electrodes.Theoatswitchorelectrodeisxed
in the sump and switches off the pump when the
water level falls below the minimum coverage
level.Ifthedry-runningprotectiononlyincludes
oneoaterorelectrodeandthelllevelsdeviate
signicantly,thenthepumpmayturnonand
offconstantly!Thiscanresultinthemaximum
number of motor activations (switching cycles)
beingexceeded.
5.4.1. Remedies for avoiding excessive switching
cycles
• Manual reset
Themotorisswitchedoffwhenthewaterlevel
falls below the minimum coverage level and
switchedbackonwhenasufcientwaterlevelis
reached.

40 WILOSE10-2014V05DINA4
English INSTALLATION
• Separate reactivation point
Asecondswitchingpoint(additionaloateror
electrode)isusedtoobtainasufcientdifference
between the activation and deactivation points.
Thispreventsconstantswitching.Thisfunction
canbeputintoeffectwithalevelcontrolrelay.
5.5. Electrical connection
ELECTROCUTION hazard!
Incorrect electrical connections can cause fa-
tal electric shocks. Electrical connections may
only be carried out by aqualied electrician
approved by the local energy supply company,
in accordance with locally applicable regula-
tions.
• Themainsconnectioncurrentandvoltagemust
be as stated on the rating plate.
• Connect the power supply cable in accordance
with the applicable standards and regulations and
according to the conductor assignment.
• Anyavailablemonitoringequipment,e.g.for
thermal motor monitoring, must be connected
and tested to ensure that it is working properly.
• Forthree-phaseACmotors,aclockwiserotating
eldmustbeavailable.
• Ground the pump properly.
Pumps that are permanently installed must be
grounded in compliance with nationally applica-
blestandards.Ifaseparategroundingconductor
is available, it must be connected to the marked
hole or earth terminal (;)usingasuitablescrew,
nut,toothedwasherandatwasher.Thecross
section of the cable for the grounding conductor
connection must correspond to the local regula-
tions.
• A motor protection switch must be used for
motors with afree cable end. We recommend
usingaresidual-currentdevice(RCD).
• Switchgears are to be purchased as accessories.
5.5.1. Mains fuses
Theback-upfusemustberatedaccordingtothe
startingcurrent.Youwillndthestartingcurrent
on the rating plate.
Onlyslow-blowfusesorKcharacteristicauto-
maticcut-outsmaybeusedasaback-upfuse.
5.5.2. Checking the insulation resistance and moni-
toring devices before commissioning
Ifthevaluesmeasureddeviatefromthespeci-
cations, moisture may have penetrated into the
motor or the power supply cable or the monitor-
ing unit may be defective. Do not connect the
pump and consult Wilo customer service.
Insulation resistance of the motor winding
Before connecting the power supply cable, the
insulationresistancemustbetested.Thiscanbe
measured with an insulation tester (measuring
voltage=1000V):
• Oninitialcommissioning:insulationresistance
maynotbelessthan20MΩ.
• Forfurthermeasurements:valuemustbelarger
than2MΩ.
For motors with an integrated capacitor, the
windings must be short-circuited before check-
ing.
Temperature sensor and pencil electrode (avail-
able as an option) for sealing chamber control
Before connecting the monitoring devices, these
mustbecheckedwithanohmmeter.Thefollow-
ingvaluesmustbecompliedwith:
• Bimetallicstrip:Value=“0”passage
• Pencilelectrode:Thisvaluemustapproach
innity.Ifthevalueislow,thereiswaterinthe
oil. Also observe the instructions of the option-
al evaluation relay.
5.5.3. AC motor
Fig. 5.: Connection diagram
LMains connection PE Earth
N
Thesingle-phaseversioncanbeexecutedas
follows:
• withashockproofplug
• withaoatswitchandshockproofplug
Theconnectiontothemainsisestablishedby
insertingtheplugintoasocket.
If the pump is to be connected directly to the
switchgear, the plug must be removed and the
electrical connection must be established by
aqualiedelectrician!
Thewiresoftheconnectioncableareassignedas
follows:
3-wire connection cable
Wire colour Terminal
brown (bn) L
blue (bu) N
green/yellow (gn-ye) PE
5.5.4. Three-phase motor
Fig. 6.: Connection diagram
L1
Mains connection
PE Earth
L2 20 Bimetallic strip
L3 21
Thethree-phaseversioncanbeexecutedas
follows:
• withaoatswitchandCEEplug
• with bare cable end
Intheversionwithaplug,theconnectiontothe
mains is established by inserting the plug into
asocket.
Intheversionwithabarecableend,theconnec-
tion to the mains is established at the switchgear.

InstallationandoperatinginstructionsWilo-RexaFIT 41
COMMISSIONING English
Electrical connections may only be made by
aqualied electrician!
Thewiresoftheconnectioncableareassignedas
follows:
6-wire connection cable
Wire number Terminal
1Temperaturemonitoring
2Temperaturemonitoring
3 U
4 V
5 W
green/yellow (gn-ye) Earth (PE)
5.5.5. Connecting the monitoring devices
All monitoring devices must be connected at all
times!
Temperature monitoring of the single-phase AC
motor
• Thetemperaturemonitoringunitisintegrat-
ed in the single-phase AC motor and switches
automatically.Themonitoringfunctionisalways
active and does not need to be connected sepa-
rately.
Temperature monitoring of the three-phase AC
motor
• Bimetallic strips can be connected directly to the
switchgear.
Connectionvalues:max.250V(AC),2.5A,
cosφ=1
• When the threshold is reached, the unit must
switch off.
Forthisreason,nowarrantyclaimscanbeaccept-
ed for any damage to the winding resulting from
unsuitable motor monitoring!
Connecting the pencil electrode (available as an
option) for sealing chamber control
• Thepencilelectrodemustbeconnectedviaan
evaluation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
switched off.
CAUTION!
If there is only awarning, the pump could be
irreparably damaged by water ingress. We
always recommend switching the pump off!
5.6. Motor protection and activation types
5.6.1. Motor protection
Theminimumrequirementformotorswithafree
cableendisathermalrelay/motorprotection
switch with temperature compensation, differ-
ential triggering and an anti-reactivation device
inaccordancewithVDE0660ortheappropriate
national regulations.
If the pump is connected to electrical systems
in which faults frequently occur, we recommend
installing additional protective devices provided
by the customer (overvoltage, undervoltage or
phase failure relays, lightning protection etc.). We
alsorecommendinstallingaresidual-current-op-
erated protection switch.
Localandnationalregulationsmustbeobserved
when connecting the pump.
5.6.2. Activation types
Direct activation
At full load, the motor protection should be set
to the rated current shown on the rating plate. At
partial load, we recommend that the motor pro-
tectionbeset5%abovethecurrentmeasuredat
the duty point.
Soft start activation
• At full load, the motor protection should be set
to the rated current at the duty point. At partial
load, we recommend that the motor protection
beset5%abovethecurrentmeasuredatthe
duty point.
• Thecurrentconsumptionmustbebelowtherat-
ed current throughout the entire operation.
• Due to the upstream motor protection, starting or
stopping should be completed within 30 seconds.
• Toavoidpowerdissipationduringoperation,
bypass the electronic starter (soft start) once
normal operation is reached.
Pumps with aplug
At full load, the motor protection should be set
to the rated current shown on the rating plate. At
partial load, we recommend that the motor pro-
tectionbeset5%abovethecurrentmeasuredat
the duty point.
Plugs are not overow-proof. Observe the
information on the protection class (IP).
Thesocket be installed so it is overow-proof.
5.6.3. Operation with frequency converters
Operationofthepumponafrequencyconverter
is not possible.
6. Commissioning
The“Commissioning”sectioncontainsalltheim-
portant instructions for the operating personnel
for starting up and operating the pump.
Thefollowingconditionsmustbeadheredtoand
monitored:
• Typeofinstallation
• Operatingmode
• Minimumwatersubmersion/max.immersion
depth
These general conditions must also be checked
after alengthy period without operation, and
any defects detected must be repaired!

42 WILOSE10-2014V05DINA4
English COMMISSIONING
Always keep this manual either by the pump
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
commissioning the pump, the following points
mustbeobserved:
• Commissioning of the pump may only be carried
outbyqualiedandtrainedpersonnelinaccord-
ance with the safety instructions.
• All persons working on or with the pump must
have received, read and understood this operating
and maintenance manual.
• All safety devices and emergency cut-outs must
be connected and checked to ensure that they
work properly.
• Electrical engineering and mechanical adjust-
mentsmustbemadebyqualiedpersonnel.
• Thepumpissuitableforuseunderthespecied
operating conditions.
• Theworkareaofthepumpisnotarecreational
area and is to be kept free of people! No persons
are allowed in the work area during start-up or
operation.
• Whenworkinginsumps,asecondpersonmustbe
present for safety reasons. Adequate ventilation
must be ensured if there is danger of poisonous
gases forming.
6.1. Electrical system
Connect the pump and install the power supply
cables as described in the “Installation” section
and in accordance with the VDE guidelines and
applicable national regulations.
Thepumpmustbeproperlyprotectedand
grounded.
Observethedirectionofrotation.Ifthedirection
of rotation is incorrect, the pump will not perform
asspeciedandmaybedamaged.
Make sure all monitoring devices are connected
and have been tested.
ELECTRICAL hazard!
Electrical current can cause fatal injuries if not
handled correctly! All pumps with free cable
ends (i.e. without plugs) must be connected
by aqualied electrician.
6.2. Rotation control
Thepumpischeckedandadjustedinthefactory
to ensure that the direction of rotation is correct.
Theconnectionmustbemadeaccordingtothe
wiring labels.
A test run must be performed under general op-
erating conditions!
6.2.1. Checking the direction of rotation
Thedirectionofrotationmustbecheckedwith
arotatingeldtesterbyalocalelectrician.Forthe
correctdirectionofrotation,aclockwiserotating
eldmustbeavailable.
The pump is not approved for operation with
acounter-clockwise rotating eld!
6.2.2. If the direction of rotation is incorrect
If the direction of rotation is incorrect for direct
startmotors,2phasesmustbeswapped.Inthe
case of star-delta motors, the connections of two
windingsmustbeswapped,e.g.U1withV1and
U2 with V2.
6.3. Level control
Check the level control device for the following
points:
• Theoatswitchmustbeabletomovefreely!
• Thewaterlevelmustnotfallbelowtheminimum!
• Themaximumswitchingfrequencymaynotbe
exceeded!
Whenusingaseparatelevelcontroldevice,
check to ensure it has been installed properly and
inspecttheswitchingpoints.Fortherequired
information please refer to the installation and
operating instructions for the level control device,
as well as the planning documentation.
6.4. Commissioning
Thepumpmusthavebeeninstalledproperlyas
speciedinthe"Installation"chapter.Thismust
be checked before the system is switched on.
Minor oil leakage in the mechanical shaft seal on
delivery is no cause for concern. However, it must
beremovedpriortosubmersionintheuid.
Keep out of the pump's work area. No persons
are allowed in the work area during start-up or
operation.
If the pump falls over, it must be switched off
before setting it up again.
WARNING: Danger of crushing!
In portable installations, the pump can fall
over when it is switched on or during opera-
tion. Make sure that the pump is positioned
on arm bearing surface and that the pump
foot is mounted correctly.
Intheversionwithaplug,notetheplug'sIPpro-
tection class.
6.4.1. Before switching on
• Checkthefollowing,ingeneral:
• Cable guidance – no loops, slightly taut
• Min./max.temperatureoftheuid
• Max.immersiondepth
• Clean the pipe system on the pressure side
(hose,piping)–ushwithcleanwatertopre-
vent deposits forming clogging.
• Thehydraulicshousingmustbecompletely
lledbytheuidandtheremustbenoairin
the housing. It can be vented by suitable vent-
ing devices in the system or, if available, using
vent screws on the pressure port.
• Check switching points of level control and
dry-running protection systems
• Check to ensure all accessories are properly
tted
• Thefollowingpointsmustalsobecheckedfor
wetwellinstallation:

InstallationandoperatinginstructionsWilo-RexaFIT 43
DECOMMISSIONING/DISPOSAL English
• Clean the pump sump of coarse contaminants
• Openallslidevalvesonthepressureside
• Thefollowingpointsmustalsobecheckedfordry
wellinstallation:
• Cleanthepipingonthesuctionside–ush
with clean water to prevent deposits forming
clogging.
• Openallslidevalvesonthepressureandsuc-
tion sides
If the slide valves on the suction and pressure
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 pump exploding.
Before switching on the pump, ensure that all
the slide valves are open and open any closed
slide valves.
6.4.2. Switch on/off
Thepumpisswitchedonandoffusingasepa-
rate operating point (on/off switch, switchgear)
provided by the customer.
During the start-up procedure, the rated current
istemporarilyexceeded.Afterthestart-uppro-
cedureisnished,thecurrentmustnotexceed
the rated current again.
If the motor does not start up, it must be
switched off without delay. Before switching it on
again,waitforthespeciedstartpauseandmake
sure to rectify the fault.
6.5. Safety rules during operation
When operating the pump, always follow the
locally applicable laws and regulations for work
safety, accident prevention and handling elec-
trical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.
Due to their design, centrifugal pumps have
rotating parts that are easily accessible. Depend-
ing on the operating condition, sharp edges can
develop on these parts.
WARNING: Danger of crushing and amputation
of limbs!
Sharp edges can form on the rotating parts in
the hydraulics. These can result in crushing
and amputation of limbs. Never reach into the
hydraulics when the machine is in operation.
Thefollowingmustbecheckedatregularinter-
vals:
• Operatingvoltage(permissibledeviation+/-
5%oftheratedvoltage)
• Frequency(permissibledeviation+/-2%of
the rated frequency)
• Current consumption (permissible deviation
betweenphasesisamaximumof5%)
• Voltage difference between the individual
phases(max.1%)
• Switching frequency (see technical data)
• Avoidairentryintheinlet,adeectorplate
shouldbettedifnecessary
• Minimum water submersion
• Switching points for level control device or
dry-running protection
• Smooth running
• All slide valves must be open.
If the slide valves on the suction and pressure
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 pump exploding.
Make sure that all slide valves are open during
operation.
7. Decommissioning/disposal
• All work must be carried out with the greatest
care.
• Proper protective clothing is to be worn.
• When carrying out work in basins and/or tanks,
the respective local protection measures must be
observed.Asecondpersonmustbepresentfor
safety reasons.
• Onlyliftingequipmentthatisinatechnically
perfect condition and load-carrying equipment
thathasbeenofciallyapprovedmaybeusedfor
lowering and raising the pump.
RISK of fatal injury due to malfunctions!
Load-carrying and lifting equipment must
be in aperfect technical condition. Work
may only commence if the lifting equipment
has been checked and found to be in perfect
working order. Ifit is not inspected, fatal
injuries may result.
7.1. Temporary decommissioning
Forthistypeofdeactivation,thepumpremains
installed and is not cut off from the electricity
supply.Intheeventoftemporarydecommission-
ing the pump must remain completely immersed
so that it is protected from frost and ice. Ensure
thatthetemperatureoftheuidandinthecol-
lectortankdoesnotfallbelow+3°C.
Thisensuresthatthepumpisalwaysreadyfor
operation.Forextendeddowntime,aregular
(monthly to quarterly) 5 minute function test
should be carried out.
CAUTION!
Only perform function runs under the proper
operating and usage conditions. Never run
the machine dry! This can result in irreparable
damage!
7.2. Decommissioning for maintenance work or
storage
Thesystemmustbeswitchedoffandthepump
must be disconnected from the mains by an
electrician and secured against being switched
on again without permission. Pumps with plugs

44 WILOSE10-2014V05DINA4
English MAINTENANCEANDREPAIR
must be unplugged (do not pull the cable!). Work
on removal, maintenance and storage can then
commence.
BEWARE of poisonous substances!
Pumps that pump liquids hazardous to health
must always be decontaminated before un-
dertaking any other work. Otherwise, there
is arisk of fatal injury! Wear the necessary
physical protection equipment!
BEWARE of burns!
The housing parts can heat up to well above
40°C. There is arisk of burns! After switch-
ing it off, let the pump cool down to ambient
temperature.
7.3. Removal
7.3.1. Portable wet well installation
Pumps in portable wet well installation can be
lifted out of the pit once they have been discon-
nected from the mains and the pressure pipe has
been drained. It may be necessary to dismantle
thehoserst.Itmaybenecessarytouseasuita-
ble lifting device.
7.3.2. Stationary wet well installation
Pumps in stationary wet well installations with
asuspensionunitareraisedoutofthesumpusing
the appropriate lifting equipment. During lifting,
always hold the power supply cable slightly taut
to prevent it being damaged.
Thecollectortankdoesnothavetobeemptied
especiallyforthispurpose.Allpressure-andsuc-
tion-side slide valves must be closed to prevent
thecollectortankoverowingorthedischarge
pipe being emptied.
7.3.3. Stationary dry well installation
Forpumpsinstationarydrywellinstallation,the
suction- and pressure-side slide valves have to
beclosedbeforeremoval.Notethattheuidin
the hydraulics housing will escape during removal.
Suitable collector tanks should be positioned to
collectalloftheescapinguid.
After undoing the screwed connections on the
suction and pressure connections, the pump can
be removed using suitable lifting equipment.
Theoperatingspacemustbecleanedthoroughly
after the pump is removed and any drips must be
wiped up.
7.4. Return delivery/storage
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.
For return delivery and storage please also refer
to the “Transport and storage” section!
7.5. Disposal
7.5.1. Operating materials
Oilsandlubricantsmustbecollectedinappropri-
ate containers and properly disposed of in terms
of EC Directive 75/439/EEC as well as in compli-
ance with the provisions of sections 5a and 5b
of the German Waste Act or the applicable local
laws.
7.5.2. Protective clothing
Protective clothing worn for cleaning and main-
tenance work is to be disposed of in accordance
withtheGermanWasteCodeTA52402andEC
Directive91/689/EEC.
7.5.3. Product
Proper disposal of this product avoids damage to
the environment and risks to personal health.
• Use the services of public or private waste dis-
posal companies, or consult them for the disposal
of the product or parts thereof.
• Formoreinformationonproperdisposal,please
contactyourlocalcouncilorwastedisposalofce
or the supplier from whom you obtained the
product.
8. Maintenance and repair
ELECTROCUTION hazard!
There is arisk of fatal electric shocks when
performing work on electrical devices. When
conducting any maintenance or repair work,
the pump must be disconnected from the
mains and secured against being switched
on again without permission. Damage to the
power supply cable may only be rectied by
aqualied electrician.
• Before any maintenance or repair work, the pump
must be deactivated and dismantled as described
inthe"Decommissioning/disposal"chapter.
• After maintenance or repair work, the pump must
be installed and connected as described in the
"Installation"chapter.
• Thepumpisswitchedonasdescribedinthe
"Commissioning"chapter.
Notethefollowing:
• All maintenance and repair work must be carried
out by Wilo customer service, authorised service
workshops or trained specialists with the greatest
ofcareandinasafeworkplace.Properprotective
clothing is to be worn.
• Thismanualmustbeavailabletoandobserved
bythemaintenancestaff.Onlymaintenance
and repair work described in this manual may be
carried out.
Any other work and/or alterations to the
construction must only be carried out by Wilo
customer service.
• When carrying out work in basins and/or tanks,
the respective local protection measures must be