Wilo Wilo-EMU TR/TRE 50-2 User manual

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Wilo-EMU TR/TRE 50-2 ... 120-1
6074714 • Ed.02/2021-10
en Installation and operating instructions

en
Installation and operating instructions Wilo-EMU TR/TRE 50-2 ... 120-1 3
Table of contents
1 General information ................................................................................................................................................................. 5
1.1 About these instructions ..................................................................................................................................................................................5
1.2 Digital instructions.............................................................................................................................................................................................5
1.3 Copyright ............................................................................................................................................................................................................5
1.4 Subject to change..............................................................................................................................................................................................5
1.5 Exclusion from warranty and liability..............................................................................................................................................................5
2 Safety......................................................................................................................................................................................... 5
2.1 Identification of safety instructions................................................................................................................................................................5
2.2 Personnel qualifications....................................................................................................................................................................................7
2.3 Personal protective equipment........................................................................................................................................................................7
2.4 Electrical work ....................................................................................................................................................................................................8
2.5 Monitoring devices ............................................................................................................................................................................................8
2.6 Fluids hazardous to health................................................................................................................................................................................8
2.7 Transport.............................................................................................................................................................................................................8
2.8 Installing/dismantling........................................................................................................................................................................................9
2.9 During operation ................................................................................................................................................................................................9
2.10 Maintenance tasks.............................................................................................................................................................................................9
2.11 Operating fluid ...................................................................................................................................................................................................9
2.12 Operator responsibilities................................................................................................................................................................................ 10
3 Transportation and storage................................................................................................................................................... 10
3.1 Delivery............................................................................................................................................................................................................. 10
3.2 Transport.......................................................................................................................................................................................................... 10
3.3 Use of lifting equipment................................................................................................................................................................................11
3.4 Storage ............................................................................................................................................................................................................. 11
4 Application/use....................................................................................................................................................................... 12
4.1 Intended use.................................................................................................................................................................................................... 12
4.2 Improper use.................................................................................................................................................................................................... 12
5 Product description................................................................................................................................................................ 12
5.1 Construction.................................................................................................................................................................................................... 12
5.2 Monitoring devices ......................................................................................................................................................................................... 14
5.3 Operation with frequency converter............................................................................................................................................................ 15
5.4 Operation in an explosive atmosphere ........................................................................................................................................................ 15
5.5 Rating plate...................................................................................................................................................................................................... 16
5.6 Type key........................................................................................................................................................................................................... 16
5.7 Scope of delivery............................................................................................................................................................................................. 16
5.8 Accessories ...................................................................................................................................................................................................... 17
6 Installation and electrical connection .................................................................................................................................. 17
6.1 Personnel qualifications................................................................................................................................................................................. 17
6.2 Operator responsibilities................................................................................................................................................................................ 17
6.3 Installation types............................................................................................................................................................................................. 17
6.4 Installation ....................................................................................................................................................................................................... 17
6.5 Electrical connection...................................................................................................................................................................................... 22
7 Commissioning........................................................................................................................................................................ 25
7.1 Personnel qualifications................................................................................................................................................................................. 26
7.2 Operator responsibilities................................................................................................................................................................................ 26
7.3 Direction of rotation monitoring .................................................................................................................................................................. 26
7.4 Operation in an explosive atmosphere ........................................................................................................................................................ 26
7.5 Before switching on........................................................................................................................................................................................ 27
7.6 Switch on and off............................................................................................................................................................................................ 27
7.7 During operation ............................................................................................................................................................................................. 28
8 Shut-down/dismantling......................................................................................................................................................... 28
8.1 Personnel qualifications................................................................................................................................................................................. 28
8.2 Operator responsibilities................................................................................................................................................................................ 29

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4 WILO SE 2021-10
8.3 Shut-down....................................................................................................................................................................................................... 29
8.4 Removal............................................................................................................................................................................................................ 29
9 Maintenance and repair.......................................................................................................................................................... 31
9.1 Personnel qualifications................................................................................................................................................................................. 31
9.2 Operator responsibilities................................................................................................................................................................................ 31
9.3 Operating fluid ................................................................................................................................................................................................ 31
9.4 Maintenance intervals.................................................................................................................................................................................... 31
9.5 Maintenance measures .................................................................................................................................................................................. 32
9.6 Repairs .............................................................................................................................................................................................................. 35
10 Faults, causes and remedies .................................................................................................................................................. 40
11 Spare parts............................................................................................................................................................................... 42
12 Disposal.................................................................................................................................................................................... 42
12.1 Oils and lubricants........................................................................................................................................................................................... 42
12.2 Protective clothing .........................................................................................................................................................................................42
12.3 Information on the collection of used electrical and electronic products.............................................................................................. 42
13 Appendix.................................................................................................................................................................................. 42
13.1 Tightening torques ......................................................................................................................................................................................... 42
13.2 Frequency converter operation .................................................................................................................................................................... 43
13.3 Ex rating ........................................................................................................................................................................................................... 43

General information en
Installation and operating instructions Wilo-EMU TR/TRE 50-2 ... 120-1 5
1 General information
1.1 About these instructions These instructions form part of the product. Compliance with the instructions is essen-
tial for correct handling and use:
ƒRead the instructions carefully before all activities.
ƒKeep the instructions in an accessible place at all times.
ƒObserve all product specifications.
ƒObserve the markings on the product.
The language of the original operating instructions is German. All other languages of
these instructions are translations of the original operating instructions.
1.2 Digital instructions The digital version of the instructions is available on the following product page:
https://qr.wilo.com/736
1.3 Copyright These installation and operating instructions have been copyrighted by Wilo. Content
of any kind must not be reproduced, distributed or used by unauthorised persons for
purposes of competition and shared with others.
1.4 Subject to change Wilo shall reserve the right to change the listed data without notice and shall not be li-
able for technical inaccuracies and/or omissions. The illustrations used may differ from
the original and are intended as an example representation of the device.
1.5 Exclusion from warranty and liab-
ility Wilo shall specifically not assume any warranty or liability in the following cases:
ƒInadequate configuration due to inadequate or incorrect instructions by the operator
or the client
ƒNon-compliance with these instructions
ƒImproper use
ƒIncorrect storage or transport
ƒIncorrect installation or dismantling
ƒInsufficient maintenance
ƒUnauthorised repairs
ƒInadequate construction site
ƒChemical, electrical or electrochemical influences
ƒWear
2 Safety This section contains basic information about the individual stages in the life cycle of
the pump. Failure to observe this information leads to:
ƒDanger to persons
ƒDanger to the environment
ƒProperty damage
ƒLoss of claims for damages
2.1 Identification of safety instruc-
tions These installation and operating instructions set out safety instructions for preventing
personal injury and damage to property. These safety instructions are shown differ-
ently:
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 dis-
played without a symbol.
CAUTION
Type and source of the danger!
Consequences or information.

en Safety
6 WILO SE 2021-10
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.
ƒNOTICE!
Useful information on handling the product
Markups
‡Prerequisite
1. Work step/list
⇒ Notice/instructions
▶ Result
Symbols
These instructions use the following symbols:
Danger of electric voltage
Danger of bacterial infection
Danger – explosive atmosphere
General warning symbol
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 protection
Personal protective equipment: wear safety harness
Personal protective equipment: wear mouth protection

Safety en
Installation and operating instructions Wilo-EMU TR/TRE 50-2 ... 120-1 7
Personal protective equipment: wear safety goggles
Working alone is prohibited! A second person must be present.
Useful information
2.2 Personnel qualifications ƒPersonnel have been instructed on locally applicable regulations governing accident
prevention.
ƒPersonnel have read and understood the installation and operating instructions.
ƒElectrical work: qualified electrician
Person with appropriate technical training, knowledge and experience who can
identify and prevent electrical hazards.
ƒInstallation/dismantling work: trained sewage technology professional
Fixation to different construction parts, lifting equipment, wastewater facility basics
ƒMaintenance work: trained sewage technology professional
Application/disposal of operating fluids used, basic engineering knowledge (installa-
tion/dismantling)
ƒLifting work: trained specialist for the operation of lifting devices
Lifting equipment, lifting gear, attachment points
Children and persons with limited abilities
ƒPersons under the age of 16: Use of this product is prohibited.
ƒPersons under the age of 18: Supervise them during use of the product (supervisor)!
ƒPersons with limited physical, sensory or mental capacities: Use of this product is
prohibited!
2.3 Personal protective equipment The protective equipment specified is the minimum requirement. Observe the require-
ments of the work regulations.
Protective equipment: Transport, installation, removal and maintenance
ƒSafety shoes: Protection class S1 (uvex 1 sport S1)
ƒProtective gloves (EN388): 4X42C (uvex C500)
ƒSafety helmet (EN397): Conforms to standards, protection against lateral deforma-
tion (uvex pheos)
(If lifting equipment is used)
Protective equipment: Cleaning work
ƒProtective gloves (ENISO374-1): 4X42C + Type A (uvex protector chemical
NK2725B)
ƒSafety goggles (EN166): (uvex skyguard NT)
–Labelling frame: W 166 34 F CE
–Labelling disc: 0-0.0* W1 FKN CE
* Protection level according to EN170 not relevant for this work.
ƒBreathing protection mask (EN149): Half mask 3M series 6000 with filter 6055 A2
Article recommendations
The articles mentioned in brackets are recommendations. The articles can be replaced
with an identical article according to the mentioned labellings!

en Safety
8 WILO SE 2021-10
2.4 Electrical work ƒElectrical work must be carried out by a qualified electrician.
ƒDisconnect device from the mains and secure it against being switched on again
without authorisation.
ƒObserve applicable local regulations when connecting to the mains power supply.
ƒComply with the requirements of the local energy supply company.
ƒTrain personnel on how to make electrical connections.
ƒTrain personnel on the options for switching off the device.
ƒObserve the technical information in these installation and operating instructions as
well as on the rating plate.
ƒEarth the device.
ƒObserve provisions for connection to the electrical switching system.
ƒComply with the specifications on electro-magnetic compatibility when using elec-
tronic start-up controllers (e.g. soft starter or frequency converter). If required, take
special measures into account (e.g. shielded cables, filters, etc.).
ƒReplace defective connection cables. Contact customer service.
2.5 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, differential triggering and anti-reactivation device in accordance with
the local regulations. In case of sensitive mains, make provision for the installation on-
site of other protective equipment (e.g. overvoltage, undervoltage or phase failure re-
lay, etc.).
Residual-current device (RCD)
ƒInstall a residual-current device (RCD) in accordance with the regulations of the local
energy supply company.
ƒIf people can come into contact with the device and conductive fluids, install a re-
sidual-current device (RCD).
2.6 Fluids hazardous to health Hazardous germs form in sewage or in stagnant water. There is a danger of bacterial in-
fections!
ƒWear protective equipment!
ƒClean and disinfect the product thoroughly after removal!
ƒInform all persons about the pumped fluid and the danger it poses!
2.7 Transport ƒLocally applicable laws and regulations on work safety and accident prevention must
be complied with.
ƒDemarcate and cordon off the working area.
ƒKeep unauthorised persons away from the working area.
ƒAlways attach the lifting gear to the attachment points.
ƒEnsure that the lifting gear is securely attached.
ƒObserve packaging instructions:
–Impact-resistant
–Ensure that the product is properly fixed in place.
–Protect it against dust, oil and moisture.

Safety en
Installation and operating instructions Wilo-EMU TR/TRE 50-2 ... 120-1 9
2.8 Installing/dismantling ƒWear a safety harness.
ƒLocally applicable laws and regulations on work safety and accident prevention must
be complied with.
ƒDemarcate and cordon off the working area.
ƒKeep working area free from ice.
ƒRemove objects lying around from the work area.
ƒKeep unauthorised persons away from the working area.
ƒIf the weather conditions mean it is no longer possible to work safely, stop work.
ƒWork must always be carried out by two persons.
ƒWhen working at a height of more than 1m (3ft) above the ground, use scaffolding
with a safety harness.
ƒEnsure enclosed spaces have sufficient ventilation.
ƒToxic or asphyxiating gases may build up in enclosed spaces or buildings. Observe
protective measures in accordance with work regulations, e.g. carry a gas detector
with you.
ƒIf there is a risk of explosion, do not carry out welding work or work with electrical
devices.
ƒDisconnect device from the mains and secure it against being switched on again
without authorisation.
ƒAll rotating parts must stop.
ƒDisinfect product.
2.9 During operation ƒDemarcate and cordon off the working area.
ƒNo persons are allowed in the working area during operation.
ƒDepending on the process, the product is activated and deactivated using separate
controls. The product may automatically be activated following power cuts.
ƒIf the motor emerges, the motor housing can heat up to above 40°C (104°F).
ƒSuperior must be informed immediately of any faults or irregularities.
ƒThe product must be switched off immediately if faults occur.
ƒPropeller must not crash into fixtures or walls. Observe defined clearances in accord-
ance with consulting documents.
ƒObserve required water immersion. If water level varies significantly, use level mon-
itoring.
ƒSound-pressure level depends on several factors (installation, duty point, etc.).
Measure the current noise level under operating conditions. Wear hearing protection
at noise levels of 85dB(A) and over. Demarcate the working area!
2.10 Maintenance tasks ƒDisconnect device from the mains and secure it against being switched on again
without authorisation.
ƒDisinfect product.
ƒCarry out maintenance work in a clean, dry and well-lit place.
ƒOnly carry out maintenance tasks described in these installation and operating in-
structions.
ƒOnly original parts of the manufacturer may be used. The use of any non-original
parts releases the manufacturer from any liability.
ƒCollect any leakage of fluid and operating fluid immediately and dispose of it ac-
cording to the locally applicable guidelines.
2.11 Operating fluid The seal housing is filled with white oil. The gear and the pre-chamber are filled with
gear oil.
ƒAbsorb leakages immediately.
ƒIf major leakages occur, contact customer service.
ƒIf the seal is defective, the oil enters the pumped fluid.
ƒSkin contact: Rinse skin areas thoroughly with soap and water. If skin irritation oc-
curs, consult a doctor.
ƒContact with eyes: Remove the contact lenses. Rinse eye thoroughly with water. If
eye irritation occurs, consult a doctor.

en Transportation and storage
10 WILO SE 2021-10
2.12 Operator responsibilities ƒProvide installation and operating instructions in a language which the personnel can
understand.
ƒMake sure that the personnel have received the required training for the specified
work.
ƒProvide protective equipment. Ensure that the protective equipment is worn by per-
sonnel.
ƒEnsure that safety and information signs mounted on the device are always legible.
ƒTrain the personnel on how the system operates.
ƒFit dangerous components within the system with an on-site guard.
ƒDemarcate and cordon off the working area.
ƒMeasure the noise level. At noise levels of 85dB(A) and over, wear hearing protec-
tion. Demarcate the working area!
3 Transportation and storage
3.1 Delivery ƒAfter receiving the shipment, check it immediately for defects (damage, complete-
ness).
ƒDefects must be noted on the freight documentation.
ƒDefects must be notified to the transport company or the manufacturer on the day
of receipt of shipment.
ƒSubsequently notified defects can no longer be asserted.
3.2 Transport
NOTICE
Transporting mixers without attachment points
Mixers for ground and wall fixation have no in-built frame and therefore no attach-
ment point. Transport the mixer on the pallet to the installation site. Have one or
two persons position the mixer at the installation site. Bear in mind the weight of the
mixer!
Fig.1: Attachment point
ƒWear protective equipment! Observe the work regulations.
–Protective gloves: 4X42C (uvex C500)
–Safety shoes: Protection class S1 (uvex 1 sport S1)
ƒAttach the mixer to the attachment point.
ƒProtect the connection cable against water ingress.
ƒOnly remove the outer packaging at the site of use to ensure that the mixer is not
damaged during transport.
ƒUse tear-proof plastic sacks of sufficient size to package used mixers for transport
in a leak-proof manner.

Transportation and storage en
Installation and operating instructions Wilo-EMU TR/TRE 50-2 ... 120-1 11
3.3 Use of lifting equipment If lifting equipment (lifting device, crane, chain hoist…) is used, observe the following
points:
ƒWear a safety helmet according to EN397!
ƒComply with local regulations on the use of lifting equipment.
ƒThe technically correct use of the lifting equipment is the operator’s responsibility!
ƒLifting gear
–Use legally specified and approved lifting gear.
–Select lifting gear based on the attachment point.
–Attach lifting gear to the attachment point according to local regulations.
ƒLifting equipment
–Check it functions properly before use!
–Sufficient bearing capacity.
–Ensure stability during use.
ƒLifting operation
–Do not jam the product when lifting and lowering it.
–Do not exceed the max. permissible bearing capacity!
–If necessary (e.g. blocked view), assign a second person to coordinate.
–No one should stand under suspended loads!
–Do not move loads over workplaces where persons are present!
3.4 Storage
DANGER
Danger due to fluids which are hazardous to health!
Danger of bacterial infection!
• Disinfect the mixer after removal.
• Observe the specifications of the work regulations.
WARNING
Risk of injury from sharp edges!
Sharp edges can form on the propeller blades. There is a danger of cuts and similar
injuries!
• Wear protective gloves!
CAUTION
Total damage from to moisture ingress
Moisture ingress in the connection cable damages the connection cable and the
mixer! Never immerse the end of the connection cable in a fluid and firmly seal it
during storage.
ƒSecurely position the mixer horizontally on a firm bearing surface.
ƒSecure the mixer against falling over and slipping.
ƒDo not set the mixer down on the propeller. In the case of larger propeller diameters,
ensure an appropriate platform is provided.
CAUTION!Material damage! Propeller and shaft can be damaged.
ƒStore the mixer for a maximum of one year. Contact customer service before storing
the device for more than one year.
ƒStorage conditions:
–Maximum: -15 to +60°C (5 to 140°F), max. humidity: 90%, non-condensing.
–Recommended: 5 to 25°C (41 to 77°F), relative humidity: 40 to 50%.
–Protect the mixer from direct exposure to sunlight. Extreme heat can cause dam-
age!
ƒDo not store the mixer in rooms in which welding work is carried out. The resulting
gases or radiation can corrode the elastomer parts and coatings.
ƒProtect the connection cable against kinking and damage. Maintain a constant bend
radius!
ƒTurn the propeller at regular intervals (twice a year). This prevents the bearings from
jamming and renews the lubrication film on the mechanical seal. NOTICE!Wear pro-
tective gloves!

en Application/use
12 WILO SE 2021-10
4 Application/use
4.1 Intended use For suspension and homogenisation in commercial areas of:
ƒProcess sewage
ƒSewage containing faeces
ƒWastewater (with small amounts of sand and gravel)
Comply with the specific dimensioning based on the operator requirements. Any other
use deviating from this is regarded as non-compliant with the intended use.
4.2 Improper use
The mixers must not be used in:
ƒDrinking water
ƒNon-Newtonian fluids
ƒSeverely contaminated fluids containing hard components such as stone, wood,
metals, etc.
ƒHighly flammable and explosive fluids in pure form
5 Product description
5.1 Construction The submersible mixer consists of the following main components:
1
2
3
45
6
7
89
Fig.2: Overview of the submersible mixer
1 Propeller
2 Gear, single-stage
3 Pencil electrode (optional)
4 Sealing chamber
5 Motor
6 Frame for lowering device
7 Handle grip
8 Connection cable
9 Pre-chamber
5.1.1 Motor
Wilo-EMU TR...
Surface-cooled submersible motor in three-phase current design with permanently
lubricated und large-size rolling bearings. The motor winding is equipped with temper-
ature monitoring. The motor heat is given off directly to the surrounding fluid via the
motor housing. The connection cable is designed for heavy mechanical loads, sealed
water pressure-tight against the fluid and is sealed longitudinally watertight. The con-
nection cable has bare cable ends and is 10m (33ft) long as standard.
Wilo-EMU TRE...
Surface-cooled submersible motor in three-phase current design with permanently
lubricated und large-size rolling bearings. The motor winding is equipped with temper-
ature monitoring. The motor heat is given off directly to the surrounding fluid via the
motor housing. The connection cable is designed for heavy mechanical loads, sealed
water pressure-tight against the fluid and is sealed longitudinally watertight. The con-
nection cable has bare cable ends and is 10m (33ft) long as standard.
The submersible motor meets the IE3/IE4 motor efficiency class (according to
IEC60034-30). Motors of the motor efficiency class “IE4” have been specified as “E4”
in the motor designation.
Technical data
Operating mode, immersed S1
Operating mode, non-immersed -
Fluid temperature 3 … 40°C (37 … 104 °F)

Product description en
Installation and operating instructions Wilo-EMU TR/TRE 50-2 ... 120-1 13
Max. immersion depth 20m (66ft)
Protection class IP68
Insulation class H
Max. switching frequency 15/h
5.1.2 Gear Single-stage planetary gear with exchangeable transmission. Gear bearings have been
dimensioned large to absorb resulting stirring forces and not transfer these to the mo-
tor bearing.
5.1.3 Seal The system is sealed by a 3-chamber system:
ƒPre-chamber
ƒGear chamber
ƒSealing chamber
Pre-chamber
The high-volume pre-chamber has been filled with gear oil to absorb any leakage at the
seal on the fluid side. A mechanical seal is used as the seal on the fluid side. A rotary
shaft seal seals towards the gear chamber.
Gear chamber
The gear chamber has been filled with gear oil to guarantee continuous lubrication of
the planetary gear and the gear bearings. A mechanical seal seals towards the sealing
chamber.
Sealing chamber
The high-volume sealing chamber is filled with white oil and absorbs any leakage from
the gear chamber. A rotary shaft seal seals towards the motor.
5.1.4 Propeller 2- or 3-bladed propeller made of solid or composite material. Nominal propeller dia-
meter of 500mm to 1200mm with clogging-free propeller geometry.
TR/E50-2... TR50-2...S TR/E60-2... TR60-2...S TR75-2... TR80-1... TR80-1...S TR/E90-2... TR120-1...
Nominal diameter in mm (in) 500
(20)
500
(20)
600
(23.5)
600
(23.5)
750
(29.5)
800
(31.5)
800
(31.5)
900
(35.5)
1200
(47)
Number of blades 3 3 3 3 3 3 2 2 3
5.1.5 Materials
TR/E50-2... TR50-2...S TR/E60-2... TR60-2...S TR75-2... TR80-1... TR80-1...S TR/E90-2... TR120-1...
Housing
EN-GJL-250 (ASTM A48 Class 35/40B) • • • • • • • • •
Seal, on the fluid side
SiC/SiC • • • • • • • • •
Seal, pre-/gear chamber
FPM (FKM) • • • • • • • • •
Seal, gear/sealing chamber
SiC/SiC • • • • • • • • •

en Product description
14 WILO SE 2021-10
TR/E50-2... TR50-2...S TR/E60-2... TR60-2...S TR75-2... TR80-1... TR80-1...S TR/E90-2... TR120-1...
Seal, sealing chamber/motor
FPM (FKM) • • • • • • • • •
Propeller
PUR • − • − • • − − −
1.4571 (AISI316TI) − • − • − − • − −
PUR/GFK (PUR/GFRP) − − − − − − • • −
PA6G −−−−−−−−•
• = standard, − = not available
5.2 Monitoring devices Overview of possible monitoring devices for submersible mixers without Ex rating:
TR/TRE50-2... TR/TRE60-2... TR75-2... TR80-1... TR/TRE90-2... TR120-1...
Motor compartment/sealing chamber o o o − o −
Pre-chamber (external pencil electrode) o o o o o o
Motor winding: Temperature limiter • • • • • •
Motor winding: Temperature controller and lim-
iter
oooooo
Key
− = not possible, o = optional, • = standard
Overview of possible monitoring devices for submersible mixers with Ex rating:
TR/TRE50-2... TR/TRE60-2... TR75-2... TR80-1... TR/TRE90-2... TR120-1...
Motor compartment/sealing chamber − − − − − −
Pre-chamber (external pencil electrode) o o o o o o
With ATEX approval
Motor winding: Temperature limiter o o o o o o
Motor winding: Temperature controller and lim-
iter
••••••
With FM-/CSA-Ex rating
Motor winding: Temperature limiter • • • • • •
Motor winding: Temperature controller and lim-
iter
oooooo
Key
− = not possible, o = optional, • = standard
All the monitoring devices fitted must always be connected!

Product description en
Installation and operating instructions Wilo-EMU TR/TRE 50-2 ... 120-1 15
Monitoring the motor compartment and sealing chamber
The motor compartment monitoring protects the motor winding from short-circuits.
Sealing chamber control detects fluid ingress from the gear chamber. In each case, the
humidity is recorded by an electrode in the motor compartment and sealing chamber.
NOTICE!The Ex version does not feature this monitoring unit!
Motor winding monitoring
Thermal motor monitoring protects the motor winding from overheating. A temper-
ature limiter with a bimetallic strip is fitted as standard. Once the activation temper-
ature has been reached, deactivation with reactivation lock must take place.
Optionally, the temperature can also be measured using a PTC sensor. Thermal motor
monitoring can also be designed as temperature control. This allows two temperatures
to be measured. Once the low activation temperature has been reached, an automatic
reactivation can be initiated after the motor has cooled down. The unit is forced to de-
activate with reactivation lock once the high activation temperature has been reached.
External monitoring of the pre-chamber
The pre-chamber can be equipped with an external pencil electrode. The electrode re-
gisters fluid ingress through the mechanical seal on the fluid side. An alarm or deactiva-
tion of the mixer can therefore occur via the system controller.
5.3 Operation with frequency con-
verter Operation on the frequency converter is permitted. Refer to the appendix for the relev-
ant requirements!
5.4 Operation in an explosive atmo-
sphere
Approval according to
TR50-2... TRE50-2... TR60-2... TRE60-2... TR75-2... TR80-1... TR90-2... TRE90-2... TR120-1...
ATEX ooooooooo
FM ooooooooo
CSA-Ex o − o − o o o − o
Legend
− = not available/possible, o = optional, • = standard
For use in explosive atmospheres, the mixer must be marked as follows on the rating
plate:
ƒ“Ex” symbol of the corresponding approval
ƒEx classification
For the relevant requirements, refer to the explosion protection chapter in the ap-
pendix of these installation and operating instructions!
ATEX approval
The mixers are suitable for operation in potentially explosive atmospheres:
ƒDevice group: II
ƒCategory: 2, zone 1 and zone 2
Mixers must not be used in zone0!
FM approval
The mixers are suitable for operation in potentially explosive atmospheres:
ƒProtection class: Explosionproof
ƒCategory: Class I, Division 1
Notice: If the cabling is carried out according to Division 1, installation in Class I, Di-
vision 2 is also permitted.

en Product description
16 WILO SE 2021-10
CSA Ex rating
The mixers are suitable for operation in potentially explosive atmospheres:
ƒProtection class: Explosion-proof
ƒCategory: Class 1Division 1
5.5 Rating plate The following is an overview of the abbreviations and associated data on the rating
plate:
Rating plate
designation
Value
P-Typ Mixer type
M-Typ Motor type
S/N Serial number
MFY Date of manufacture*
n Speed
T Max. fluid temperature
IP Protection class
INRated current
IST Starting current
ISF Rated current at service factor
P2Rated power
U Rated voltage
f Frequency
Cos φ Motor efficiency
SF Service factor
OTSOperating mode: immersed
OTEOperating mode: non-immersed
AT Starting mode
m Weight
*The date of manufacture is stated in accordance with ISO8601: JJJJWww
ƒJJJJ = year
ƒW = abbreviation for week
ƒww = calendar week
5.6 Type key Example: Wilo-EMU TRE 90-2.20-4/12Ex S00
EMU Submersible mixer, horizontal
TRE Series:
ƒTR: Mixer with standard asynchronous motor
ƒTRE: Mixer with IE3/IE4 asynchronous motor
90 x10 = nominal propeller diameter in mm
2Model
20 x10 = nominal propeller speed in rpm
4Number of poles
12 x10 = stator pack length in mm
Ex Ex-rated
S00 Propeller code for special propeller (omitted for standard propeller)
5.7 Scope of delivery ƒSubmersible mixer with attached propeller and connection cable
ƒAccessories attached, depending on the installation type
ƒInstallation and operating instructions

Installation and electrical connection en
Installation and operating instructions Wilo-EMU TR/TRE 50-2 ... 120-1 17
5.8 Accessories ƒMounting bracket for wall and floor fixation
ƒLowering device
ƒAuxiliary lifting device
ƒCable bollard to secure the hoist cable
ƒAdjustable stop
ƒAdditional rope anchoring
ƒFixation sets with anchor bolts
6 Installation and electrical con-
nection
6.1 Personnel qualifications ƒElectrical work: qualified electrician
Person with appropriate technical training, knowledge and experience who can
identify and prevent electrical hazards.
ƒInstallation/dismantling work: trained sewage technology professional
Fixation to different construction parts, lifting equipment, wastewater facility basics
ƒLifting work: trained specialist for the operation of lifting devices
Lifting equipment, lifting gear, attachment points
6.2 Operator responsibilities ƒObserve locally applicable accident prevention and safety regulations.
ƒObserve all regulations for working with heavy loads and under suspended loads.
ƒProvide protective equipment. Ensure that the protective equipment is worn by per-
sonnel.
ƒDemarcate the working area.
ƒKeep unauthorised persons away from the working area.
ƒIf the weather conditions (e.g. ice formation, strong wind) mean it is no longer pos-
sible to work safely, stop work.
ƒObserve local sewage technology regulations for the operation of sewage systems.
ƒStructural components and foundations must be of sufficient stability in order to al-
low the device to be fixed in a secure and functional manner. The operator is re-
sponsible for the provision and suitability of the structural component/foundation!
ƒCheck that the available consulting documents (installation plans, installation loca-
tion, inflow conditions) are complete and accurate.
6.3 Installation types ƒStationary ground and wall fixation
The installation type depends on the propeller diameter and basin geometry.
ƒFlexible installation with lowering device
6.4 Installation
DANGER
Danger due to fluids hazardous to health during installation!
Ensure that the installation site is clean and disinfected during installation. If contact
with fluids that are hazardous to health is possible, observe the following points:
• Wear protective equipment:
⇒ sealed safety goggles
⇒ mouth protection
⇒ protective gloves
• Wipe up drips immediately.
• Observe the specifications of the work 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 dan-
gerous work. Such work may not be carried out autonomously!
• Only carry out work with another person!

en Installation and electrical connection
18 WILO SE 2021-10
CAUTION
Material damage due to incorrect fixation
Defective fixation may limit the functionality of the mixer or damage it.
• If the mixer is fixed to a concrete structure, use anchor bolts for fixation. Follow the
manufacturer’s installation instructions! Temperature specifications and hardening
periods must be strictly observed.
• If the mixer is fixed to a steel structure, ensure that the structure is sufficiently
strong. Use fixation materials with sufficient strength!
Use suitable materials to avoid electrochemical corrosion!
• Tighten all screwed connections. Observe torque specifications.
ƒWear protective equipment! Observe the work regulations.
–Protective gloves: 4X42C (uvex C500)
–Safety shoes: Protection class S1 (uvex 1 sport S1)
–Wear a safety harness.
–Safety helmet: EN397 Conforms to standards, protection against lateral deform-
ation (uvex pheos)
(When using lifting equipment)
ƒPrepare the installation site:
–Clean, free of coarse solids
–Dry
–Frost-free
–Disinfected
ƒWork must always be carried out by two persons.
ƒDemarcate the working area.
ƒKeep unauthorised persons away from the working area.
ƒFrom a working height of more than 1m (3ft) above the ground, use scaffolding
with a safety harness.
ƒToxic or asphyxiating gases may build up during work:
–Observe protective measures in accordance with work regulations (gas measure-
ment, carry a gas detector with you).
–Ensure adequate ventilation.
–If toxic or asphyxiating gases accumulate, leave the workplace immediately!
ƒInstall lifting equipment: even surface, clean, firm base. Warehouse and installation
location must be easily accessible.
ƒAttach chain or wire rope to handle/attachment point with a shackle. Only use lifting
gear that has been technically approved.
ƒDo not stay within the swivel range of the hoisting gear.
ƒAll connection cables must be laid properly. The connection cables must not pose
any risk (i.e. tripping, damage during operation). Check whether the cable cross-sec-
tion and the cable length are sufficient for the selected installation type.
ƒObserve minimum clearances to walls and any fixtures.
6.4.1 Maintenance tasks After a storage period of more than 12months, carry out the following maintenance
tasks before installation:
ƒRotate propeller.
See section “Rotating the propeller [}32]”.
ƒOil change in sealing, gear and pre-chamber.
See section “Oil change [}34]”.

Installation and electrical connection en
Installation and operating instructions Wilo-EMU TR/TRE 50-2 ... 120-1 19
6.4.2 Wall fixation
Fig.3: Wall fixation
In the case of wall fixation, the mixer is mounted either on a mounting bracket or dir-
ectly on the basin wall. The mixer can be horizontally pivoted with the mounting
bracket. Lay the connection cable against the basin wall and lead it upwards.
‡Operating space/installation location is prepared for the installation. Defined clear-
ances to fixtures and basin walls are kept in accordance with the consulting docu-
ments.
‡Mixer is not connected to the mains.
‡For installation at heights over 1m, use scaffolding with a safety harness.
1. Position the mixer at the basin wall using hoisting gear and mark the mounting
holes.
2. Set the mixer down outside of the working area.
3. Drill fixation holes and insert anchor bolts. NOTICE!Follow the manufacturer’s in-
stallation instructions!
4. Once the anchor bolts have hardened in place, use the hoisting gear to place the
mixer on the anchor bolts and fix in place with fixation material.
5. Fix the mixer firmly against the basin wall. NOTICE!Follow the manufacturer’s in-
stallation instructions!
6. Lay the connection cable against the basin wall so that it is slightly taut. CAU-
TION!If the connection cable leads over the edge of the basin, beware of po-
tential abrasion. Sharp edges may damage the connection cable. Bevel the basin
edge if necessary!
7. Apply corrosion protection (e.g. Sikaflex): Fill the slotted holes on the motor flange
up to the washer.
▶ Mixer is installed. Make the electrical connection.
6.4.3 Ground installation
Fig.4: Ground installation
In the case of ground installation, the mixer is fixed directly to the floor of the basin us-
ing a mounting bracket. CAUTION!If the mixer is ordered for ground installation, the
mounting bracket comes pre-assembled. If the mixer is delivered without a mount-
ing bracket, order the appropriate mounting bracket from customer service! Lay the
connection cable along the basin floor and upwards up the basin wall.
‡Operating space/installation location is prepared for the installation. Defined clear-
ances to fixtures and basin walls are kept in accordance with the consulting docu-
ments.
‡Mixer is not connected to the mains.
‡Mounting bracket mounted on the mixer.
1. Use hoisting gear to position the mixer on the basin floor and mark 2fixation holes.
2. Set the mixer down outside of the working area.
3. Drill fixation holes and insert anchor bolts. NOTICE!Follow the manufacturer’s in-
stallation instructions!
4. Once the anchor bolts have hardened in place, use the hoisting gear to place the
mixer on the anchor bolts and fix in place with fixation material.
5. Mount the mixer firmly against the basin floor. NOTICE!Follow the manufac-
turer’s installation instructions!
6. Lay the connection cable against the basin floor and the basin wall so that it is
slightly taut. CAUTION!If the connection cable leads over the edge of the basin,
beware of potential abrasion. Sharp edges may damage the connection cable.
Bevel the basin edge if necessary!
7. Apply corrosion protection (e.g. Sikaflex):
- Sealing joint between mounting bracket and structure.
- Fill holes in the baseplate of the mounting bracket.
- Fill scratches in the mounting bracket.
▶ Mixer is installed. Make the electrical connection.

en Installation and electrical connection
20 WILO SE 2021-10
6.4.4 Installation with lowering device The mixer is lowered into the basin using a lowering device. The lowering device’s guide
pipe safely guides the mixer to the duty point. The resultant reaction forces are trans-
ferred directly into the foundation via the lowering device. The foundation must be de-
signed to bear this load!
CAUTION!Material damage due to incorrect accessories! Due to the high reaction
forces, the mixer may only be operated with the manufacturer’s accessories (lower-
ing device and frame). If the mixer is ordered for installation with a lowering device,
the frame comes pre-assembled. If the mixer is delivered without a frame, order the
appropriate frame from customer service!
Preparatory tasks
1
2
3
4
5
6
7
Fig.5: Prepare the mixer
1 Hoisting gear
2 Lifting equipment
3 Shackle for attachment
4 Support (optional accessory)
5 Platform for secure set-down
6 Frame
7 Cable brackets for strain relief
‡Mixer set down and horizontal.
‡Frame mounted on the mixer.
‡Lowering device mounted in basin.
‡Hoisting gear with sufficient bearing capacity is available.
1. Attach lifting equipment to frame with a shackle.
2. Version with plastic rollers: Loosen linchpins and dismantle plastic rollers and
quick-release axles.
NOTICE!Prepare components for further installation.
3. Lay all connection cables and mount cable brackets.
Cable brackets secure connection cables to the lifting equipment. This prevents
the connection cables from floating around uncontrollably in the basin. Keep to the
following distances:
1st cable bracket: 500mm
All other cable brackets: 750mm
Lift the mixer and swivel it over the basin
±0°
8
6
21
Fig.6: Swivel the mixer over the basin
1 Hoisting gear
2 Lifting equipment
6 Frame
8 Guide pipe for lowering device
‡Preparatory tasks completed.
1. Lift mixer so that it can be swivelled safely over the railings.
NOTICE!The mixer must be suspended horizontally with the hoisting gear. If the
mixer hangs at an angle to the hoisting gear, adjust the attachment point on the
frame.
2. Pivot the mixer over the basin.
NOTICE!The frame must be perpendicular to the guide pipe. If the frame is not
perpendicular to the guide pipe, adjust the reach of the hoisting gear.