Wilo Rexa CUT GI User manual

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Wilo-Rexa CUT GI
6069820 • Ed.03/2019-02
en Installation and operating instructions

en
Installation and operating instructions Wilo-Rexa CUT GI 3
Table of contents
1 General information ................................................................................................................................................................. 5
1.1 About these instructions ..................................................................................................................................................................................5
1.2 Copyright ............................................................................................................................................................................................................5
1.3 Subject to change..............................................................................................................................................................................................5
1.4 Warranty..............................................................................................................................................................................................................5
2 Safety......................................................................................................................................................................................... 5
2.1 Identification of safety instructions................................................................................................................................................................5
2.2 Personnel qualifications....................................................................................................................................................................................6
2.3 Electrical work ....................................................................................................................................................................................................6
2.4 Monitoring devices ............................................................................................................................................................................................6
2.5 Use in fluids hazardous to health ....................................................................................................................................................................7
2.6 Transport.............................................................................................................................................................................................................7
2.7 Installing/dismantling........................................................................................................................................................................................7
2.8 During operation ................................................................................................................................................................................................7
2.9 Maintenance tasks.............................................................................................................................................................................................8
2.10 Operating fluid ...................................................................................................................................................................................................8
2.11 Operator responsibilities...................................................................................................................................................................................8
3 Application/use......................................................................................................................................................................... 8
3.1 Intended use.......................................................................................................................................................................................................8
3.2 Improper use.......................................................................................................................................................................................................8
4 Product description.................................................................................................................................................................. 9
4.1 Design..................................................................................................................................................................................................................9
4.2 Monitoring devices ............................................................................................................................................................................................9
4.3 Operating modes................................................................................................................................................................................................9
4.4 Operation with frequency converter............................................................................................................................................................ 10
4.5 Operation in an explosive atmosphere ........................................................................................................................................................ 10
4.6 Technical data .................................................................................................................................................................................................10
4.7 Type key........................................................................................................................................................................................................... 10
4.8 Scope of delivery............................................................................................................................................................................................. 10
4.9 Accessories ...................................................................................................................................................................................................... 10
5 Transportation and storage................................................................................................................................................... 11
5.1 Delivery............................................................................................................................................................................................................. 11
5.2 Transport.......................................................................................................................................................................................................... 11
5.3 Storage ............................................................................................................................................................................................................. 11
6 Installation and electrical connection .................................................................................................................................. 12
6.1 Personnel qualifications................................................................................................................................................................................. 12
6.2 Installation types............................................................................................................................................................................................. 12
6.3 Operator responsibilities................................................................................................................................................................................ 12
6.4 Installation ....................................................................................................................................................................................................... 12
6.5 Electrical connection...................................................................................................................................................................................... 16
7 Commissioning........................................................................................................................................................................ 18
7.1 Personnel qualifications................................................................................................................................................................................. 18

en
4 WILO SE 2019-02
7.2 Operator responsibilities................................................................................................................................................................................ 18
7.3 Direction of rotation check (for three-phase current motors only)........................................................................................................ 18
7.4 Before switching on........................................................................................................................................................................................ 18
7.5 Switching on and off ...................................................................................................................................................................................... 19
7.6 During operation ............................................................................................................................................................................................. 19
8 Shut-down/dismantling......................................................................................................................................................... 19
8.1 Personnel qualifications................................................................................................................................................................................. 19
8.2 Operator responsibilities................................................................................................................................................................................ 19
8.3 Shut-down....................................................................................................................................................................................................... 20
8.4 Removal............................................................................................................................................................................................................ 20
9 Maintenance and repair.......................................................................................................................................................... 21
9.1 Personnel qualifications................................................................................................................................................................................. 21
9.2 Operator responsibilities................................................................................................................................................................................ 21
9.3 Operating fluid ................................................................................................................................................................................................ 22
9.4 Maintenance intervals.................................................................................................................................................................................... 22
9.5 Maintenance measures .................................................................................................................................................................................. 22
9.6 Repairs .............................................................................................................................................................................................................. 24
10 Faults, causes and remedies .................................................................................................................................................. 25
11 Spare parts............................................................................................................................................................................... 27
12 Disposal.................................................................................................................................................................................... 27
12.1 Oils and lubricants........................................................................................................................................................................................... 27
12.2 Protective clothing .........................................................................................................................................................................................27
12.3 Information on the collection of used electrical and electronic products.............................................................................................. 27
13 Appendix.................................................................................................................................................................................. 28
13.1 Tightening torques ......................................................................................................................................................................................... 28

General information en
Installation and operating instructions Wilo-Rexa CUT GI 5
1 General information
1.1 About these instructions
These installation and operating instructions are an integral part
of the product. Read these instructions before commencing work
and keep them in an accessible place at all times. Strict adherence
to these instructions is a precondition for the intended use and
correct operation of the product. All information and markings on
the product must be observed.
The language of the original operating instructions is German. All
other languages of these instructions are translations of the ori-
ginal operating instructions.
1.2 Copyright
These installation and operating instructions have been copy-
righted by the manufacturer. Contents of any kind may not be re-
produced or distributed, or used for purposes of competition and
shared with others.
1.3 Subject to change
The manufacturer reserves the right to make technical modifica-
tions to the device or individual components. The illustrations
used may differ from the original and are intended as an example
representation of the device.
1.4 Warranty
The specifications in the current “General Terms and Conditions”
apply to the warranty and the warranty period. These can be
found at www.wilo.com/legal
Any deviations must be contractually agreed and shall then be
given priority.
Claim to warranty
If the following points are complied with, the manufacturer is ob-
ligated to rectify every qualitative or constructive flaw:
ƒThe defects are reported in writing to the manufacturer within
the warranty period.
ƒApplication according to intended use.
ƒAll monitoring devices are connected and tested before com-
missioning.
Exclusion from liability
Exclusion from liability excludes all liability for personal injury, ma-
terial damage or financial losses. This exclusion ensues as soon as
one of the following applies:
ƒInadequate configuration due to inadequate or incorrect in-
structions by the operator or the client
ƒNon-compliance with installation and operating instructions
ƒImproper use
ƒIncorrect storage or transport
ƒIncorrect installation or dismantling
ƒInsufficient maintenance
ƒUnauthorised repairs
ƒInadequate construction site
ƒChemical, electrical or electro-chemical influences
ƒWear
2 Safety
This chapter contains basic information for the individual phases
of the life cycle. Failure to observe this information carries the fol-
lowing risks:
ƒInjury to persons from electrical, mechanical and bacteriolo-
gical factors as well as electromagnetic fields
ƒEnvironmental damage from discharge of hazardous sub-
stances
ƒProperty damage
ƒFailure of important functions of the product
Failure to observe the information contained herein will result in
the loss of claims for damages.
The instructions and safety instructions in the other chapters
must also be observed!
2.1 Identification of safety instructions
These installation and operating instructions set out safety in-
structions for preventing personal injury and damage to property.
These safety instructions are shown differently:
ƒSafety instructions relating to personal injury start with a signal
word, are preceded by a corresponding symbol and are
shaded in grey.
DANGER
Type and source of the danger!
Consequences of the danger and instructions for
avoidance.
ƒSafety instructions relating to property damage start with a
signal word and are displayed without a symbol.
CAUTION
Type and source of the danger!
Consequences or information.
Signal words
ƒDANGER!
Failure to observe the safety instructions will result in serious
injuries or death!
ƒWARNING!
Failure to follow the instructions can lead to (serious) injuries!
ƒCAUTION!
Failure to follow the instructions can lead to property damage
and a possible total loss.

en Safety
6 WILO SE 2019-02
ƒNOTICE!
Useful information on handling the product
Symbols
These instructions use the following symbols:
Danger of electric voltage
Danger of bacterial infection
Danger of explosion
General warning symbols
Warning of crushing
Warning of cutting injuries
Warning of hot surfaces
Warning of high pressure
Warning of suspended loads
Personal protective equipment: Wear a safety helmet
Personal protective equipment: Wear foot protection
Personal protective equipment: Wear hand protec-
tion
Personal protective equipment: Wear mouth protec-
tion
Personal protective equipment: Wear safety goggles
Autonomous work prohibited! A second person must
be present.
Useful information
Markups
‡Prerequisite
1. Work step/list
⇒ Notice/instructions
▶ Result
2.2 Personnel qualifications
Personnel must:
ƒBe instructed about locally applicable regulations governing
accident prevention.
ƒHave read and understood the installation and operating in-
structions.
Personnel must have the following qualifications.
ƒElectrical work: A qualified electrician must carry out the elec-
trical work.
ƒInstallation/dismantling: The technician must be trained in the
use of the necessary tools and fixation materials for the relev-
ant construction site.
ƒMaintenance tasks: The technician must be familiar with the
use of operating fluids and their disposal. In addition, the
technician must have basic knowledge of mechanical engin-
eering.
Definition of “qualified electrician”
A qualified electrician is a person with appropriate technical edu-
cation, knowledge and experience who can identify and prevent
electrical hazards.
2.3 Electrical work
ƒElectrical work must be carried out by a qualified electrician.
ƒBefore commencing work, disconnect the product from the
mains and safeguard it from being switched on again.
ƒObserve applicable local regulations when connecting to the
mains power supply.
ƒAdhere to the requirements of the local energy supply com-
pany.
ƒTrain personnel in connecting electrics.
ƒInstruct personnel in options for switching off the device.
ƒComply with the technical specifications contained in these
installation and operating instructions and on the rating plate.
ƒEarth the device.
ƒObserve regulations for connection to the electrical switching
system.
ƒComply with the specifications on electro-magnetic compat-
ibility when using electronic start-up controllers (e.g. soft
starter or frequency converter). If required, take into account
special measures (e.g. shielded cables, filters etc.).
ƒReplace defective connection cables. Contact customer ser-
vice.
2.4 Monitoring devices
The following monitoring devices must be provided on-site:
Circuit breaker
The size and switching characteristics of the circuit breakers
must conform to the rated current of the connected product.
Observe local regulations.
Motor protection switch
Make provision for an on-site motor protection switch for
devices without a plug! The minimum requirement is a thermal
relay/motor protection switch with temperature compensation,

Safety en
Installation and operating instructions Wilo-Rexa CUT GI 7
differential triggering and anti-reactivation device in accordance
with the local regulations. In case of sensitive mains, make provi-
sion for the installation on-site of other protective equipment
(e.g. overvoltage, undervoltage or phase failure relay, etc.).
Residual-current device (RCD)
Comply with the regulations of the local energy supply company!
The use of a residual-current device is recommended.
If persons come into contact with the device and conductive flu-
ids, secure the connection with a residual-current device (RCD).
2.5 Use in fluids hazardous to health
There is a danger of bacterial infection when using the device in
fluids hazardous to health! Thoroughly clean and disinfect the
device after dismantling and prior to further use. The operator
must ensure the following:
ƒThe following protective equipment is provided and worn when
cleaning the device:
–Closed safety goggles
–Breathing mask
–Protective gloves
ƒAll persons are informed about the fluid, the associated danger
and its correct handling!
2.6 Transport
ƒThe following protective equipment must be worn:
–Safety shoes
–Safety helmet (when using lifting equipment)
ƒAlways hold the handle to transport the device. Never pull the
power supply cable!
ƒOnly use legally specified and approved lifting gear.
ƒSelect the lifting gear based on the existing conditions
(weather, attachment point, load, etc.).
ƒAlways attach the lifting gear to the attachment points (handle
or lifting eyelet).
ƒThe stability of the lifting equipment must be ensured during
operation.
ƒWhen using lifting equipment, a second person must be
present to coordinate the procedure if required (e.g. if the op-
erator’s field of vision is blocked).
ƒPersons are not permitted to stand beneath suspended loads.
Do not carry suspended loads over workplaces where people
are present.
2.7 Installing/dismantling
ƒWear the following protective equipment:
–Safety shoes
–Safety gloves for protection against cuts
–Safety helmet (when using lifting equipment)
ƒLocally applicable laws and regulations for work safety and ac-
cident prevention must be complied with.
ƒDisconnect the device from the mains and secure it against be-
ing switched on again without authorisation.
ƒAll rotating parts must be at a standstill.
ƒProvide adequate aeration in closed rooms.
ƒWhen working in chambers and closed spaces, a second person
must be present for safety reasons.
ƒTake immediate countermeasures if there is a build-up of toxic
or suffocating gases!
ƒClean the device thoroughly. Disinfect devices that are used in
fluids hazardous to health!
ƒMake sure that there is no risk of explosion when carrying out
any type of welding work or work with electrical devices.
2.8 During operation
ƒWear the following protective equipment:
–Safety shoes
–Ear protection (in accordance with the notice of the work
regulations)
ƒWork area of the device is not a recreational area. No persons
are allowed in the work area during operation.
ƒThe operator must immediately report any faults or irregularit-
ies to their line manager.
ƒIf safety-endangering defects occur, the operator must imme-
diately deactivate the device:
–Malfunction of the safety and monitoring device
–Damage to the housing parts
–Damage to the electrical equipment
ƒNever reach into the suction port. The rotating parts can crush
and sever limbs.
ƒIf the motor emerges during operation, the motor housing can
heat up to above 40°C (104°F).
ƒOpen all gate valves in the piping on the suction and pressure
side.
ƒEnsure minimum water submersion through dry-running pro-
tection.
ƒUnder normal operating conditions, the sound pressure level of
the device is below 85dB(A). However, the actual sound-pres-
sure level depends on several factors:
–Installation depth
–Installation
–Fixation of accessories and pipe
–Duty point
–Immersion depth
ƒIf the device is operated under normal operating conditions,
the operator must measure the sound pressure. Ear protection

en Application/use
8 WILO SE 2019-02
must be worn for sound pressure levels of 85dB(A) and above
and this must be noted in the work regulations!
2.9 Maintenance tasks
ƒWear the following protective equipment:
–Closed safety goggles
–Safety shoes
–Safety gloves for protection against cuts
ƒAlways carry out maintenance tasks outside the operating
space/installation site.
ƒOnly carry out maintenance tasks mentioned in these installa-
tion and operating instructions.
ƒOnly original parts from the manufacturer may be used for
maintenance and repairs. Use of parts other than the original
parts releases the manufacturer from any liability.
ƒCollect any leakage of fluid and operating fluid immediately
and dispose of it according to the locally applicable guidelines.
ƒStore tools at the designated locations.
ƒAfter completing work, reattach all safety and monitoring
devices and check that they function properly.
Changing operating fluid
In case of a defect, a pressure of several bar can build up in the
motor! This pressure escapes when the screw plugs are opened.
If screw plugs are opened without due caution, they can be ejec-
ted at high speed! To avoid injuries, observe the following in-
structions:
ƒAdhere to the prescribed sequence of work steps.
ƒUnscrew the screw plugs slowly, but never unscrew them
completely. As soon as the pressure escapes (audible whistling
or hissing of air), stop turning the screw plug any further.
WARNING!Hot operating fluids can also spray out when the
pressure is escaping. This can result in scalding! To avoid in-
juries, allow the motor to cool down to the ambient tem-
perature before carrying out any work!
ƒWhen the pressure has completely dissipated, fully unscrew
the screw plug.
2.10 Operating fluid
In the sealing chamber, the motor is filled with white oil. Operat-
ing fluid must be replaced during regular maintenance work and
disposed off according to the local guidelines.
2.11 Operator responsibilities
ƒInstallation and operating instructions must be in a language
which the personnel can understand.
ƒMake sure that the personnel is relevantly trained for the spe-
cified work.
ƒProvide the necessary protective equipment and make sure
that the personnel wears it.
ƒSafety and information signs mounted on the device must be
always legible.
ƒTrain the personnel pertaining to the functioning of the sys-
tem.
ƒEliminate risk from electrical current.
ƒEquip hazardous components inside the system with an on-
site guard.
ƒIdentify and cordon off the work area.
ƒTo ensure safe working practice, define the responsibilities of
the employees.
Children and persons younger than 16years or with reduced
physical, sensory or mental capacities or limited experience are
prohibited from handling the product! A technician must super-
vise persons younger than 18years!
3 Application/use
3.1 Intended use
Submersible pumps are suitable for pumping:
ƒSewage containing faeces
ƒWastewater (with small amounts of sand and gravel)
ƒFluids with dry matter up to max. 8%
NOTICE
Cleaning cloths and wipes can cause clogging
in the macerator!
To prevent cleaning cloths and wipes in the fluid,
mechanically pre-clean the incoming fluid.
3.2 Improper use
DANGER
Explosion due to pumping of explosive fluids!
Pumping of highly flammable and explosive fluids
(gasoline, kerosene, etc.) in pure form is strictly pro-
hibited. There is a risk of fatal injury due to explosion!
The pumps are not designed for these fluids.
DANGER
Danger due to fluids hazardous to health!
If the pump is used in fluids hazardous to health, de-
contaminate the pump after dismantling and before
carrying out any other work! There is a risk of fatal
injury! Observe the specifications in the work regula-
tions! The operator must make sure that the person-
nel have received and read the work regulations!
The submersible pumps must not be used for pumping:
ƒDrinking water

Product description en
Installation and operating instructions Wilo-Rexa CUT GI 9
ƒFluids containing hard components (such as stones, wood,
metal, etc.)
ƒFluids containing large quantities of abrasive contents (e.g.
sand, gavel)
Intended use also includes compliance with this manual. Any other
use is regarded as non-compliant with the intended use.
4 Product description
4.1 Design
Submersible sewage pump with internal macerator as a submers-
ible monobloc unit for intermittent operation in wet well installa-
tion.
1
5
6
3
4
2
Fig.1: Overview
1 Handle/attachment point
2 Motor housing
3 Seal housing
4 Pressure connection
5 Hydraulics housing
6 Power supply cable
4.1.1 Hydraulics
Centrifugal hydraulics with upstream macerator. The macerator
breaks up admixtures suitable for cutting for transfer in a 1¼"
pressure pipe or larger. The pressure side connection is designed
as a horizontal flange connection.
The hydraulics are not self-priming, in other words, the fluid must
flow in either automatically or with supply pressure.
4.1.2 Motor
The drive versions used are single-phase current and three-phase
current surface-cooled motors. The motor is cooled by the fluid
around it. The waste heat is transferred directly to the fluid or the
ambient air via the motor housing. The motor may emerge during
operation.
The connection cable is available in the following versions:
ƒSingle-phase current version with shockproof plug
On AC motors, the start capacitor and operating capacitor is
installed in a capacitor switchgear.
ƒThree-phase current version with bare cable end
4.1.3 Seal
The seal for the fluid and the motor compartment is made via two
mechanical seals. The sealing chamber between the mechanical
seals is filled with medical white oil.
4.1.4 Material
ƒPump housing: EN-GJL-250 (ASTMA48 Class35/40B)
ƒImpeller: EN-GJL-250 (ASTMA48 Class35/40B)
ƒMacerator: 1.4528 (AISI440B+Co)
ƒMotor housing: Stainless steel AISI1.4301 (304)
ƒShaft: 1.4401 (AISI 316)
ƒSeal on the motor side: C/MgSiO4
ƒSeal on the fluid side: SiC/SiC
ƒSeal, static: NBR (Nitrile)
4.1.5 Fitted accessories
Plug
In the "P" version, a shockproof plug is attached. The plug is de-
signed for use in commercially available shockproof sockets and is
not overflow-proof.
4.2 Monitoring devices
Monitoring of motor winding
The thermal motor monitoring protects the motor winding from
overheating. Temperature limiter with bimetallic strip is fitted as
standard.
Thermal motor monitoring is self-switching for single-phase cur-
rent motors, i.e. if the motor is switched off due to overheating
and then cools down, it is automatically switched on again.
For three-phase current motors, the thermal motor monitoring
must be connected in the switchgear or plug.
External monitoring of the sealing chamber
The sealing chamber can be equipped with an external pencil
electrode. The electrode registers fluid ingress through the mech-
anical seal on the fluid side. An alarm or deactivation of the pump
can therefore take place by pump control.
4.3 Operating modes
Operating mode S1: Continuous duty
The pump can operate continuously at the rated load without ex-
ceeding the permissible temperature.

en Product description
10 WILO SE 2019-02
Operating mode S2: Short-time duty
The maximum operating period is specified 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.
Operating mode S3: Intermittent periodic duty
This operating mode defines a switching cycle in a combination
of periods of operation and standstill. Specified value (e.g.
S325%) relates to the operating time. The switching cycle has a
duration of 10min.
If two values (e.g. S325%/120s) are specified, the first value
relates to the operating time. The second value specifies the max.
period of the switching cycle.
4.4 Operation with frequency converter
Operation on the frequency converter is not permitted.
4.5 Operation in an explosive atmosphere
Operation in an explosive atmosphere is not permitted.
4.6 Technical data
General
Date of manufacture
[MFY]
See rating plate
Mains connection [U/f] See rating plate
Power consumption [P1] See rating plate
Rated power [P2] See rating plate
Max. delivery head [H] See rating plate
Max. volume flow [Q] See rating plate
Activation type [AT] See rating plate
Fluid temperature [t] 3…40°C
Pressure connection DN32/DN40/Rp 1¼
Protection class IP68
Insulation class [Cl.] F
Speed [n] See rating plate
Max. switching fre-
quency
30/h
Max. immersion depth
[8]
See rating plate
Cable length (standard
version)
10m
Explosion protection -
Operating modes
Immersed [OTs] S1
Non-immersed [OTe] S2-15, S3 10%*
* Operating mode S325% is permitted if the necessary motor
cooling is guaranteed before the motor is switched on again! To
ensure the required cooling, the motor must be completely im-
mersed for at least 1min.
Statement of date of manufacture
The date of manufacture is stated in accordance with ISO8601:
JJJJWww
ƒJJJJ = year
ƒW = abbreviation for week
ƒww = calendar week
4.7 Type key
Example: Wilo-Rexa CUT GI03.31/S-M15-2-523/P
CUT Series
GI Grinder pump with internal macerator
03 Nominal diameter of the pressure connection: DN32
31 Max. delivery head in m
S Surface-cooled motor with stainless steel housing
M Mains connection version: M=1~, T=3~
15 /10=rated power P2 in kW
2 Number of poles
5 Frequency mains connection: 5=50Hz, 6=60Hz
23 Code for rated voltage
P
Additional electrical equipment:
Without=with bare cable end
P=with plug
4.8 Scope of delivery
ƒPump
ƒCable with plug or bare cable end
ƒSingle-phase current version with capacitor switchgear
ƒInstallation and operating instructions
4.9 Accessories
ƒCable lengths in fixed length increments of 10m (33ft) up to
max. 30m (99ft) in single-phase current version or max. 50m
(164ft) in three-phase current version
ƒSuspension unit
ƒPump support foot
ƒExternal pencil electrode for sealing chamber control
ƒLevel control devices
ƒFixation accessories and chains
ƒSwitchgear, relays and plugs

Transportation and storage en
Installation and operating instructions Wilo-Rexa CUT GI 11
5 Transportation and storage
5.1 Delivery
After receiving the shipment, this must be checked immediately
for defects (damage, completeness). Defects must be noted on
the freight documentation! Furthermore, defects must be notified
to the transport company or the manufacturer immediately on the
day of receipt of shipment. Subsequently notified defects can no
longer be asserted.
5.2 Transport
WARNING
Standing under suspended loads!
Never allow anyone to stand under suspended loads!
Danger of (serious) injuries caused by falling parts.
Loads may not be carried over work places where
people are present!
WARNING
Head and foot injuries due to a lack of protect-
ive equipment!
Danger of (serious) injuries during work. Wear the fol-
lowing protective equipment:
• Safety shoes
• Safety helmet must be worn if lifting equipment
are used!
NOTICE
Use only properly functioning lifting equip-
ment!
Use only properly functioning lifting equipment to lift
and lower the pump. Ensure that the pump does not
become jammed during lifting and lowering. Do not
exceed the maximum bearing capacity of the lifting
equipment! Check that lifting equipment is function-
ing properly before use!
CAUTION
Soaked packaging may tear!
The product may fall on the ground if unprotected
and may be damaged. Lift wet packaging carefully
and replace it immediately!
Only remove the outer packaging at the place of utilisation to en-
sure that the pump is not damaged during transport. Use tear-
proof plastic sacks of sufficient size to package used pumps for
transport in a leak-proof manner.
The following points must also be observed:
Fig.2: Attachment point
ƒAdhere to the applicable national safety regulations.
ƒUse legally specified and approved lifting gear.
ƒSelect the lifting gear based on the existing conditions
(weather, attachment point, load, etc.).
ƒOnly attach the lifting gear to the attachment point. Fix with a
shackle.
ƒUse lifting equipment with sufficient bearing capacity.
ƒThe stability of the lifting equipment must be ensured during
operation.
ƒWhen using lifting equipment, a second person must be
present to coordinate the procedure if required (e.g. if the op-
erator’s field of vision is blocked).
5.3 Storage
DANGER
Danger due to fluids hazardous to health!
If the pump is used in fluids hazardous to health, de-
contaminate the pump after dismantling and before
carrying out any other work! There is a risk of fatal in-
jury! Observe the specifications in the work regula-
tions! The operator must make sure that the person-
nel have received and read the work regulations!
WARNING
Attached macerator: sharp edges on the cut-
ting plate and rotating blade!
The macerator can cause amputation of limbs! Wear
safety gloves to protect against cuts and never reach
into the macerator!

en Installation and electrical connection
12 WILO SE 2019-02
CAUTION
Defective macerator due to incorrect storage!
Storage without the use of transportation bolts dam-
ages the macerator! Always screw on the transporta-
tion bolts before storing the pump.
CAUTION
Defective macerator due to objects lying
around!
Hard objects can damage the macerator! When set-
ting down, ensure that no objects come into contact
with the macerator.
CAUTION
Total damage due to moisture ingress
Moisture ingress in the power supply cable damages
the power supply cable and the pump! Never im-
merse the end of the power supply cable in a fluid
and firmly seal it during storage.
Newly supplied pumps can be stored for one year. Contact cus-
tomer service to store the pump for more than one year.
The following must be observed for storage:
ƒPlace the pump upright (vertical) on a firm bearing surface and
secure it against slipping and falling over!
ƒThe max. storage temperature is -15°C to +60°C (5°F to
140°F) at a max. relative humidity of 90%, non-condensing.
Frost-proof storage at a temperature of 5°C to 25°C (41°F to
77°F) with relative humidity of 40% to 50% is recommen-
ded.
ƒDo not store the pump in rooms in which welding work is car-
ried out. The resulting gases or radiation can corrode the
elastomer parts and coatings.
ƒSeal the suction and pressure connection tightly.
ƒProtect power supply cables against kinking and damage.
ƒProtect the pump from direct sunlight and heat. Extreme heat
can cause damage to the impellers and the coating!
ƒElastomer parts and the coating are subject to natural brittle-
ness. Contact customer service if the pump must be stored for
more than 6months.
After storage, remove any dust and oil from the pump and check
the coating for damage. Repair damaged coatings before further
use.
6 Installation and electrical connection
6.1 Personnel qualifications
ƒElectrical work: A qualified electrician must carry out the elec-
trical work.
ƒInstallation/dismantling: The technician must be trained in the
use of the necessary tools and fixation materials for the relev-
ant construction site.
6.2 Installation types
ƒVertical stationary wet well installation with suspension unit
ƒVertical portable wet well installation with pump support foot
The following installation types are not permitted:
ƒDry well installation
ƒHorizontal installation
6.3 Operator responsibilities
ƒObserve locally applicable accident prevention and safety reg-
ulations of trade associations.
ƒObserve all regulations for working with heavy loads and un-
der suspended loads.
ƒProvide protective equipment and ensure that the protective
equipment is worn by personnel.
ƒObserve local sewage technology regulations for the opera-
tion of sewage systems.
ƒAvoid pressure surges!
Pressure surges can occur in long pressure pipes with steep
terrain. These pressure surges can lead to the destruction of
the pump!
ƒEnsure the cooling time of the motor depending on the oper-
ating conditions and the size of the pump chamber.
ƒStructural components and foundations must be of sufficient
stability in order to allow the device to be fixed securely and
functionally. The operator is responsible for the provision and
suitability of the structural component/foundation!
ƒCheck that the available consulting documents (installation
plans, design of the operating space, inflow conditions) are
complete and correct.
6.4 Installation
DANGER
Risk of fatal injury due to dangerous lone
working practices!
Work in chambers and narrow rooms as well as work
involving risk of falling are dangerous work. Such
work may not be carried out autonomously! A second
person must be present for safety reasons.

Installation and electrical connection en
Installation and operating instructions Wilo-Rexa CUT GI 13
WARNING
Hand and foot injuries due to lack of protect-
ive equipment!
Danger of (serious) injuries during work. Wear the fol-
lowing protective equipment:
• Safety gloves for protection against cuts
• Safety shoes
• Safety helmet must be worn if lifting equipment
are used!
NOTICE
Use only properly functioning lifting equip-
ment!
Use only properly functioning lifting equipment to lift
and lower the pump. Ensure that the pump does not
become jammed during lifting and lowering. Do not
exceed the maximum bearing capacity of the lifting
equipment! Check that lifting equipment is function-
ing properly before use!
NOTICE
Emerging of the motor during operation
If the motor emerges during operation, observe the
instructions for “non-immersed operating mode”! To
ensure the necessary cooling of the motor for con-
tinuous duty, the motor must be completely im-
mersed before re-activation!
ƒPrepare operating space/installation location as follows:
–Clean, free of coarse solids
–Dry well
–Frost-free
–Decontaminated
ƒTake immediate countermeasures if there is a build-up of toxic
or suffocating gases!
ƒUse the handle for lifting, lowering and transporting the pump.
Never carry or drag the pump by the power supply cable!
ƒIt must be possible to attach lifting equipment safely. The
storage place and the operating space/installation site must be
accessible with the lifting equipment. The set-down location
must have a solid bearing surface.
ƒAttach the lifting gear to the handle using a shackle. Only use
lifting gear which has been technically approved.
ƒThe routed power supply cables must allow safe operation.
Check whether the cable cross-section and the cable length
are sufficient for the selected installation type.
ƒThe corresponding IP class must be observed when using
switchgear. Install the switchgear overflow-proof and outside
potentially explosive areas!
ƒAvoid air intake into the fluid, use baffles or deflector plates for
the inlet. Air which has entered the system can collect in the
pipe system and lead to impermissible operating conditions. Air
pockets must be removed via ventilation systems!
ƒA dry run of the pump is prohibited! Avoid air pockets in the
hydraulics housing or in the pipe system. Ensure the water level
never falls below the minimum. The installation of a dry-run-
ning protection is recommended!
6.4.1 Indications for double pump operation
If several pumps are used in an operating space, minimum dis-
tances between the pumps and the wall must be complied with.
Here there is a difference in the distances depending on the type
of system: Alternating operation or parallel operation.
d
A2
A1
Fig.3: Minimum distances
d Diameter hydraulics housing
A1
Minimum distance from the wall:
- alternating operation: min. 0.3×d
- parallel operation: min. 1×d
A2
Distance to pressure pipes
- alternating operation: min. 1.5×d
- parallel operation: min. 2×d
6.4.2 Maintenance tasks
After a storage period of more than 6months, check the oil in the
sealing chamber prior to installation:

en Installation and electrical connection
14 WILO SE 2019-02
+/-
Fig.4: Check the oil
+/
-
Screw plug sealing chamber
‡Pump is not installed.
‡Pump is not connected to the mains.
‡Protective equipment has been put on!
1. Place the pump horizontally on a firm surface. The screw
plug points upwards. WARNING!Risk of hands being
crushed. Ensure that the pump cannot fall over or slip
away!
2. Unscrew the screw plug.
3. Place a suitable tank to collect the operating fluid.
4. Drain the operating fluid: Rotate the pump until the
opening points downwards.
5. Check the operating fluid:
⇒ If the operating fluid is clear, reuse operating fluid.
⇒ If the operating fluid is contaminated (black), fill
with new operating fluid. Dispose of operating fluid
in accordance with the local regulations!
⇒ Notify customer service if an operating fluid con-
tains metal chips!
6. Pour in operating fluid: Rotate the pump until the open-
ing points upwards. Fill-in the operating fluid into the
opening.
⇒ Comply with the specifications for operating fluid
locations and quantity! When recycling the operat-
ing fluid, check the quantity and if required adjust
it!
7. Clean the screw plug, replace the seal ring and screw it
back in. Max. tightening torque: 8Nm (5.9ftlb)!
6.4.3 Stationary wet well installation
NOTICE
Pumping problems due to water level being
too low
If the fluid is lowered too much, separation of the
volume flow may occur. Furthermore, air cushions
may form in the hydraulic system, resulting in un-
desirable behaviour during operation. The minimum
permissible water level must reach the upper edge of
the hydraulics housing!
The pump is installed in the fluid for the wet well installation. For
this, a suspension unit must be installed in the chamber. On the
pressure side, the on-site pipe system is connected to the sus-
pension unit and on the suction side to the pump. The connected
pipe system must be self-supporting. The suspension unit must
not support the pipe system!
CAUTION!If the motor emerges during operation, observe the
operating mode for non-immersed operation (S2-15, S3
10%*)!
* Operating mode S325% is permitted if the necessary motor
cooling is guaranteed before the motor is switched on again! To
ensure the required cooling, the motor must be completely im-
mersed for at least 1min.
Work steps
1
5
6
S1
S2/S3
3
4
2
Fig.5: Stationary wet well installation
1 Suspension unit
2 Non-return valve
3 Stop valve
4 Guide pipe (provided by the customer)
5 Lifting equipment

Installation and electrical connection en
Installation and operating instructions Wilo-Rexa CUT GI 15
6 Attachment point for the lifting equipment
‡Operating space/installation location is prepared for the
installation.
‡Suspension unit and pipe system were installed.
‡Pump is prepared for operation on the suspension unit.
1. Use a shackle to attach the lifting equipment to the at-
tachment point of the pump.
2. Lift the pump, swivel it above the chamber opening and
slowly lower the guide claw onto the guide pipe.
3. Lower the pump until it sets on the suspension unit and
is connected automatically. CAUTION!Hold the power
supply cables slightly taut when lowering the pump!
4. Loosen the lifting equipment from the lifting gear and
secure it at the chamber outlet against falling.
5. Have the power supply cables routed into the chamber
by a qualified electrician and route it outside properly
from the chamber.
▶ The pump is installed, the qualified electrician can make
the electrical connection.
6.4.4 Portable wet well installation
WARNING
Risk of burns from hot surfaces!
Motor housing can become hot during operation. It
may cause burns. Allow the pump to cool down at
ambient temperature after switching it off!
WARNING
Separation of pressure hose!
Separation or movement of the pressure hose can
lead to (serious) injuries. Securely attach the pressure
hose to the outlet! Prevent buckling of the pressure
hose.
NOTICE
Pumping problems due to water level being
too low
If the fluid is lowered too much, separation of the
volume flow may occur. Furthermore, air cushions
may form in the hydraulic system, resulting in un-
desirable behaviour during operation. The minimum
permissible water level must reach the upper edge of
the hydraulics housing!
For portable installation, the pump must be equipped with a pump
support foot. The pump support foot ensures minimum ground
clearance in the suction area and enables secure footing if placed
on a solid bearing surface. In this installation type, the pump can
be installed anywhere in the operating space/installation site. A
hard base must be used at the installation location to prevent
sinking in case of soft bearing surfaces. A pressure hose is con-
nected on the pressure side. If operated for longer periods of time,
fix the pump firmly to the floor. This prevents vibration and en-
sures quiet and low-wearing running.
CAUTION!If the motor emerges during operation, observe the
operating mode for non-immersed operation (S2-15, S3
10%*)!
* Operating mode S325% is permitted if the necessary motor
cooling is guaranteed before the motor is switched on again! To
ensure the required cooling, the motor must be completely im-
mersed for at least 1min.
Work steps
1
6
5
3
4
2
S1
S2 / S3
Fig.6: Portable wet well installation
1 Pump support foot
2 Pipe elbow with hose connection or Storz pipe coupling
3 Storz hose coupling
4 Pressure hose
5 Lifting equipment
6 Attachment point
‡Pump support foot mounted.
‡Pressure connection prepared: Pipe elbow with hose
connection or pipe elbow with Storz coupling mounted.
1. Use a shackle to attach the lifting equipment to the at-
tachment point of the pump.
2. Lift the pump and lower it at the intended location
(chamber, pit).

en Installation and electrical connection
16 WILO SE 2019-02
3. Place the pump on a solid bearing surface. CAU-
TION!Sinking must be prevented!
4. Lay the pressure hose and fasten it to a certain point
(e.g. drainage). DANGER!Separation or movement of
the pressure hose can lead to (serious) injuries! Se-
curely attach the pressure hose to the outlet.
5. Lay the power supply cable properly. CAUTION!Do not
damage the power supply cable!
▶ The pump is installed, the qualified electrician can make
the electrical connection.
6.4.5 Level control
With a level control device, the current fill levels are determined
and the pump is switched on and off automatically depending on
the fill levels. Fill levels are recorded by using different sensor
types (float switches, pressure and ultrasound measurements or
electrodes). The following must be observed when using a level
control device:
ƒFloat switches can move freely!
ƒThe water level must not fall below the minimum permissible!
ƒThe maximum switching frequency must not be exceeded!
ƒIf the fill levels fluctuate strongly, a level control with two
measuring points is recommended. This makes it possible to
achieve larger differential gaps.
6.4.6 Dry-running protection
Dry-running protection must prevent the pump from operating
without fluid and air from entering the hydraulics. The minimum
permissible fill level must be determined with the help of a signal
transmitter. Once the specified limit value is reached, the pump
must be deactivated with an appropriate signal. Dry-running pro-
tection can expand the available level controls by an additional
measuring point or function as an independent switch-off
device. Depending on the system security, the pump can be re-
started automatically or manually. Installation of dry-running
protection is recommended for optimum operational reliability.
6.5 Electrical connection
DANGER
Risk of death due to electrocution!
Improper conduct when carrying out electrical work
can lead to death due to electric shock! Electrical
work must be carried out by a qualified electrician in
accordance with the locally applicable regulations.
ƒThe mains connection must match the specifications on the
rating plate.
ƒPower supply on mains side for three-phase current motors
with clockwise rotating field.
ƒLay the connection cable in accordance with the locally ap-
plicable regulations and connect it according to the wire as-
signment.
ƒConnect the monitoring devices and check their function.
ƒEarth the device properly in accordance with applicable local
regulations.
6.5.1 Fuse on mains side
Circuit breaker
The size and switching characteristics of the circuit breakers
must conform to the rated current of the connected product.
Observe local regulations.
Motor protection switch
Make provision for an on-site motor protection switch for
devices without a plug! The minimum requirement is a thermal
relay/motor protection switch with temperature compensation,
differential triggering and anti-reactivation device in accordance
with the local regulations. In case of sensitive mains, make provi-
sion for the installation on-site of other protective equipment
(e.g. overvoltage, undervoltage or phase failure relay, etc.).
Residual-current device (RCD)
Comply with the regulations of the local energy supply company!
The use of a residual-current device is recommended.
If persons come into contact with the device and conductive flu-
ids, secure the connection with a residual-current device (RCD).
6.5.2 Maintenance tasks
Carry out the following maintenance tasks prior to installation:
ƒCheck the insulation resistance of the motor winding.
ƒTest the resistance of the temperature sensor.
ƒTest the resistance of the pencil electrode (optionally avail-
able).
If the measured values differ from the specifications:
ƒMoisture may have penetrated into the motor or the connec-
tion cable.
ƒThe monitoring device may be defective.
Contact customer service in the event of a fault.
6.5.2.1 Checking the insulation resistance of the motor wind-
ing
Use an insulation tester to measure the insulation resistance
(measuring voltage=1000V). Observe the following values:
ƒAt the time of initial commissioning: Insulation resistance may
not be less than 20MΩ.
ƒFor further measurements: Value must be greater than 2MΩ.
NOTICE!For motors with an integrated capacitor, short-circuit
the windings prior to checking!

Installation and electrical connection en
Installation and operating instructions Wilo-Rexa CUT GI 17
6.5.2.2 Test the resistor of the temperature sensor
Measure the resistor of the temperature sensors with an ohm-
meter. The bimetallic strips must have a measured value of 0Ohm
(passage).
6.5.2.3 Testing the resistor of the external electrode for seal-
ing chamber control
Measure the resistor of the electrode with an ohmmeter. The
measured value must approach “infinity”. For values ≤30kOhm, if
there is water in the oil – change the oil!
6.5.3 Connection of the single-phase current motor
bn
bu
Cr
Cs
M 1~
gn-ye
U1/Z1
bn
U2
bk
Z2
gy
gn-ye
LNPE
Fig.7: Connection diagram single-phase current motor
Wire colour Terminal
Brown (bn) L
Blue (bu) N
Green/yellow (gn-ye) Earth
The single-phase current version is equipped with a shockproof
plug. The connection to the mains is established by inserting the
plug into a socket. The plug is not overflow-proof. Install the
socket so that it is overflow-proof! Observe the information on
the protection class (IP) of the plug.
DANGER!If the pump is connected directly to the switchgear,
dismantle the plug and arrange for the electrical connection to
be carried out by a qualified electrician!
6.5.4 Three-phase current motor connection
W
5 1 2
V
4
U
3
M 3~
gn-ye
L3L2 2120L1PE
250 V (AC); 2,5 A; cos φ = 1
Fig.8: Connection diagram three-phase current motor
Wire number Designation Terminal
1 20 WSK
2 21 WSK
3 U L1
4 V L2
5 W L3
Green/yellow (gn-ye) Earth PE
The three-phase current version is equipped with bare cable ends.
Connection to the mains is established by connecting the power
supply cable in the switchgear. Electrical connection must al-
ways be carried out by a qualified electrician!
For the correct direction of rotation, a clockwise rotating field
must be available.
NOTICE!The individual wires are designated according to the
connection diagram. Do not cut the wires! There is no additional
assignment between the wiring diagram and connection dia-
gram.
6.5.5 Monitoring device connection
All monitoring device must be connected!
6.5.5.1 Monitoring of motor winding
Single-phase current motor
Thermal motor monitoring is self-switching for single-phase cur-
rent motors. The monitoring function is always active and does
not need to be connected separately.
Three-phase current motor with bimetallic strip
Bimetallic strips are directly connected to the switchgear or via an
evaluation relay.
Connection values: max. 250V(AC), 2.5A, cos φ=1
When the threshold is reached, deactivation must take place.
In the version with an attached plug, the thermal motor monitor-
ing is pre-wired and set to the correct value in the plug.

en Commissioning
18 WILO SE 2019-02
6.5.5.2 Sealing chamber monitoring (external electrode)
Connect the external electrode via an evaluation relay. Relay
“NIV101/A” is recommended for this. The threshold is 30kOhm.
Once the threshold is reached, a warning must be output or the
unit must be switched off.
CAUTION
Connection of the sealing chamber control
If on reaching the threshold, there is only a warning,
the pump could be irreparably damaged by the water
ingress. Deactivation of the pump is always recom-
mended!
6.5.6 Motor protection adjustment
Motor protection must be set depending on the selected activa-
tion type.
6.5.6.1 Direct activation
At full load, set the motor protection switch to the rated current
(see rating plate). At partial load, it is recommended to set the
motor protection switch 5% above the current measured at the
duty point.
6.5.6.2 Soft starter
At full load, set the motor protection switch to the rated current
(see rating plate). At partial load, it is recommended to set the
motor protection switch 5% above the current measured at the
duty point. The following points must also be observed:
ƒPower consumption must always be below the rated current.
ƒComplete starting and stopping within 30s.
ƒTo avoid power dissipation, bypass the electronic starter (soft
start) once normal operation is reached.
6.5.7 Operation with frequency converter
Operation on the frequency converter is not permitted.
7 Commissioning
WARNING
Foot injuries due to a lack of protective
equipment!
Danger of (serious) injuries during work. Wear safety
shoes!
7.1 Personnel qualifications
ƒElectrical work: A qualified electrician must carry out the elec-
trical work.
ƒOperation/control: Operating personnel must be instructed in
the functioning of the complete system.
7.2 Operator responsibilities
ƒProviding installation and operating instructions by the pump
or at a place specially reserved for it.
ƒMaking the installation and operating instructions available in
the language of the personnel.
ƒMaking sure that the installation and operating instructions
are read and understood by all personnel.
ƒAll safety devices and emergency cut-outs on the system-
side must be active and checked to ensure that they work
properly.
ƒThe pump is suitable for use under the specified operating
conditions.
7.3 Direction of rotation check (for three-phase current
motors only)
The pump is factory-checked and adjusted to the correct direc-
tion of rotation for a clockwise rotating field. Connection is made
in accordance with the specifications in chapter “Electrical con-
nection”.
Direction of rotation check
A qualified electrician checks the rotating field at the mains con-
nection with a rotating field-test device. For the correct direction
of rotation, a clockwise rotating field must be available at the
mains connection. The pump is not approved for operation with a
counter-clockwise rotating field! CAUTION!If the direction of
rotation is checked with a test run, comply with the ambient
and operating conditions!
Incorrect direction of rotation
If the direction of rotation is incorrect, change the connection as
follows:
ƒSwap two phases for motors with direct starting.
ƒSwap the connections of two windings (e.g. U1/V1 and U2/V2)
for star-delta activation motors.
7.4 Before switching on
Check the following prior to activation:
ƒCheck whether the device has been installed properly and in
accordance with the locally applicable regulations:
–Has the pump been earthed?
–Layout of power supply cable tested?
–Electrical connection made properly?
–Mechanical components attached correctly?
ƒCheck level control:
–Float switches can move freely?
–Switching level tested (pump on, pump off, minimum water
level)?
–Additional dry-running protection installed?
ƒTest operating conditions:

Shut-down/dismantling en
Installation and operating instructions Wilo-Rexa CUT GI 19
–Min./max. temperature of the fluid tested?
–Max. immersion depth tested?
–Operating mode defined depending on the minimum water
level?
–Maximum switching frequency adhered to?
ƒCheck installation location/operating space:
–Pipe system on the pressure side free of deposits?
–Inlet or pump sump cleaned or free of deposits?
–All gate valves open?
–Minimum water level defined and monitored?
The hydraulics housing must be filled completely with the
fluid and there must be no air cushions in the hydraulics.
NOTICE!Provide suitable venting devices if there is a risk
of air cushions being formed in the system!
7.5 Switching on and off
During the start process, the rated current is temporarily ex-
ceeded. During operation, the rated current may no longer be ex-
ceeded. CAUTION!If the pump does not start, switch off the
pump immediately. Remove the fault before reactivating the
pump!
Place pumps which are installed as portable pumps on a firm sur-
face so they are level. If pumps have fallen over, place them up-
right again before activating them. Securely attach the pump with
screws in case of difficult surfaces.
Pumps with bare cable end
The pump must be switched on and off using a separate operating
point (on/off switch, switchgear) provided by the customer.
Pump with attached plug
ƒSingle-phase current version: After inserting the plug in the
socket, the pump is switched on.
7.6 During operation
WARNING
Amputation of limbs due to rotating compon-
ents!
No persons must be present in the work area of the
pump! There is risk of (serious) injuries due to rotating
components! No persons must be present in the work
area of the pump during start-up or operation.
WARNING
Risk of burns from hot surfaces!
Motor housing can become hot during operation. It
may cause burns. Allow the pump to cool down at
ambient temperature after switching it off!
NOTICE
Pumping problems due to water level being
too low
If the fluid is lowered too much, separation of the
volume flow may occur. Furthermore, air cushions
may form in the hydraulic system, resulting in un-
desirable behaviour during operation. The minimum
permissible water level must reach the upper edge of
the hydraulics housing!
When operating the pump, observe the locally applicable regula-
tions on the following topics:
ƒWork safety
ƒAccident prevention
ƒHandling electrical machines
Strictly adhere to the responsibilities of the personnel specified by
the operator. All personnel are responsible for ensuring that the
responsibilities of the personnel and the regulations are observed!
Due to their design, centrifugal pumps have rotating parts that are
easily accessible. Depending on the operating condition, sharp
edges can develop on these parts. WARNING!This can lead to
cuts and limbs may be severed! Check the following at regular
intervals:
ƒOperating voltage (+/-10% of the rated voltage)
ƒFrequency (+/-2% of the rated frequency)
ƒPower consumption between individual phases (max.5%)
ƒVoltage difference between the individual phases (max.1%)
ƒMax. switching frequency
ƒMinimum water submersion depending on the operating mode
ƒInlet: no air intake
ƒLevel control device/dry-running protection: Switching points
ƒQuiet/low-vibration running
ƒAll gate valves open
8 Shut-down/dismantling
8.1 Personnel qualifications
ƒOperation/control: Operating personnel must be instructed in
the functioning of the complete system.
ƒElectrical work: A qualified electrician must carry out the elec-
trical work.
ƒInstallation/dismantling: The technician must be trained in the
use of the necessary tools and fixation materials for the relev-
ant construction site.
8.2 Operator responsibilities
ƒLocally applicable accident prevention and safety regulations
of trade associations.

en Shut-down/dismantling
20 WILO SE 2019-02
ƒObserve regulations for working with heavy loads and under
suspended loads.
ƒProvide the necessary protective equipment and make sure
that the personnel wears it.
ƒProvide adequate aeration in closed rooms.
ƒTake immediate countermeasures if there is a build-up of
toxic or suffocating gases!
8.3 Shut-down
The pump is deactivated during decommissioning, but remains
installed. This ensures that the pump is always ready for opera-
tion.
‡To protect the pump from frost and ice, always immerse
the pump completely in the fluid.
‡The temperature of the fluid must always be above
+3°C (+37°F).
1. Switch off the pump at the operating point.
2. Secure the operating point against being switched on
again by unauthorised persons (e.g. lock main switch).
▶ The pump is out of operation and can now be dis-
mantled.
If the pump remains installed after decommissioning, observe the
following:
ƒEnsure that the prerequisites for decommissioning are main-
tained for the complete period of decommissioning. If these
prerequisites cannot be guaranteed, dismantle the pump after
decommissioning!
ƒFor an extended period of decommissioning, carry out a 5-
minute function test at regular intervals (monthly to
quarterly). CAUTION!A function test may only be carried out
under the applicable operating conditions. A dry run is not
permitted! Non-compliance can result in irreparable dam-
age!
8.4 Removal
DANGER
Danger due to fluids hazardous to health!
If the pump is used in fluids hazardous to health, de-
contaminate the pump after dismantling and before
carrying out any other work! There is a risk of fatal
injury! Observe the specifications in the work regula-
tions! The operator must make sure that the person-
nel have received and read the work regulations!
DANGER
Risk of death due to electrocution!
Improper conduct when carrying out electrical work
can lead to death due to electric shock! Electrical
work must be carried out by a qualified electrician in
accordance with the locally applicable regulations.
DANGER
Risk of fatal injury due to dangerous lone
working practices!
Work in chambers and narrow rooms as well as work
involving risk of falling are dangerous work. Such
work may not be carried out autonomously! A second
person must be present for safety reasons.
WARNING
Risk of burns from hot surfaces!
Motor housing can become hot during operation. It
may cause burns. Allow the pump to cool down at
ambient temperature after switching it off!
NOTICE
Use only properly functioning lifting equip-
ment!
Use only properly functioning lifting equipment to
lift and lower the pump. Ensure that the pump does
not become jammed during lifting and lowering. Do
not exceed the maximum bearing capacity of the
lifting equipment! Check that lifting equipment is
functioning properly before use!
8.4.1 Stationary wet well installation
‡Pump is decommissioned.
‡Gate valves on the inlet and pressure side closed.
1. Disconnect the pump from the mains.
2. Attach the lifting equipment to the attachment point.
CAUTION!Never pull on the power supply cable! This
damages the power supply cable!
3. Slowly raise the pump and lift above the guide pipes
from the operating space. CAUTION!The power supply
cable can be damaged while lifting! Hold the power
supply cable slightly taut when lifting!
4. Clean the pump thoroughly (see point “Cleaning and
disinfecting”). DANGER!Disinfect the pump when used
in fluids hazardous to health!