Wilo TR 212 Series User manual

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Wilo-EMU TR/TRE 212 ... 326-3
6088786 • Ed.02/2021-05
en Installation and operating instructions

en
Installation and operating instructions Wilo-EMU TR/TRE 212 ... 326-3 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 Exclusion from warranty and liability..............................................................................................................................................................5
2 Safety......................................................................................................................................................................................... 5
2.1 Identification of safety instructions................................................................................................................................................................5
2.2 Personnel qualifications....................................................................................................................................................................................7
2.3 Electrical work ....................................................................................................................................................................................................7
2.4 Monitoring devices ............................................................................................................................................................................................7
2.5 Use in fluids hazardous to health ....................................................................................................................................................................8
2.6 Transport.............................................................................................................................................................................................................8
2.7 Installing/dismantling........................................................................................................................................................................................8
2.8 During operation ................................................................................................................................................................................................9
2.9 Maintenance tasks.............................................................................................................................................................................................9
2.10 Operating fluid ...................................................................................................................................................................................................9
2.11 Operator responsibilities...................................................................................................................................................................................9
3 Application/use....................................................................................................................................................................... 10
3.1 Intended use.................................................................................................................................................................................................... 10
3.2 Improper use.................................................................................................................................................................................................... 10
4 Product description................................................................................................................................................................ 10
4.1 Construction.................................................................................................................................................................................................... 10
4.2 Monitoring devices ......................................................................................................................................................................................... 12
4.3 Operating modes............................................................................................................................................................................................. 13
4.4 Operation with frequency converter............................................................................................................................................................ 13
4.5 Operation in an explosive atmosphere ........................................................................................................................................................ 13
4.6 Rating plate...................................................................................................................................................................................................... 13
4.7 Type key........................................................................................................................................................................................................... 14
4.8 Scope of delivery............................................................................................................................................................................................. 14
4.9 Accessories ...................................................................................................................................................................................................... 14
5 Transportation and storage................................................................................................................................................... 15
5.1 Delivery............................................................................................................................................................................................................. 15
5.2 Transport.......................................................................................................................................................................................................... 15
5.3 Storage ............................................................................................................................................................................................................. 16
6 Installation and electrical connection .................................................................................................................................. 16
6.1 Personnel qualifications................................................................................................................................................................................. 16
6.2 Operator responsibilities................................................................................................................................................................................ 16
6.3 Installation types............................................................................................................................................................................................. 17
6.4 Installation ....................................................................................................................................................................................................... 17
6.5 Electrical connection...................................................................................................................................................................................... 23
7 Commissioning........................................................................................................................................................................ 26
7.1 Personnel qualifications................................................................................................................................................................................. 27
7.2 Operator responsibilities................................................................................................................................................................................ 27
7.3 Direction of rotation monitoring .................................................................................................................................................................. 27
7.4 Operation in an explosive atmosphere ........................................................................................................................................................ 28
7.5 Before switching on........................................................................................................................................................................................ 29
7.6 Switch on and off............................................................................................................................................................................................ 29
7.7 During operation ............................................................................................................................................................................................. 29
8 Shut-down/dismantling......................................................................................................................................................... 30
8.1 Personnel qualifications................................................................................................................................................................................. 30
8.2 Operator responsibilities................................................................................................................................................................................ 30
8.3 Shut-down....................................................................................................................................................................................................... 30
8.4 Removal............................................................................................................................................................................................................ 31

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4 WILO SE 2021-05
9 Maintenance and repair.......................................................................................................................................................... 32
9.1 Personnel qualifications................................................................................................................................................................................. 33
9.2 Operator responsibilities................................................................................................................................................................................ 33
9.3 Operating fluid ................................................................................................................................................................................................ 33
9.4 Maintenance intervals.................................................................................................................................................................................... 34
9.5 Maintenance measures .................................................................................................................................................................................. 34
9.6 Repairs .............................................................................................................................................................................................................. 37
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.............................................................................................. 43
13 Appendix.................................................................................................................................................................................. 43
13.1 Tightening torques ......................................................................................................................................................................................... 43
13.2 Frequency converter operation .................................................................................................................................................................... 43
13.3 Ex rating ........................................................................................................................................................................................................... 44

General information en
Installation and operating instructions Wilo-EMU TR/TRE 212 ... 326-3 5
1 General information
1.1 About these instructions These instructions form part of the product. Adherence to these instructions is a re-
quirement for the intended use and correct operation of the product:
ƒCarefully read the instructions prior to any activities on and with the product.
ƒKeep the instructions in an accessible place at all times.
ƒObserve all product specifications and labels on the device.
The language of the original operating instructions is German. Versions of these in-
structions in any other language are translations of the original operating instructions.
1.2 Copyright Copyright remains with Wilo. Do not:
ƒReproduce any content.
ƒDistribute any content.
ƒUse any content for competition purposes without authorisation.
Wilo shall reserve the right to change the listed data without notice and shall not be li-
able for technical inaccuracies and/or omissions.
1.3 Subject to change Wilo shall reserve the rights to make technical changes to the product and individual
components. The illustrations used may differ from the original and are intended as a
sample representation of the device.
1.4 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 chapter contains basic information for the individual phases of the life cycle. Fail-
ure to observe this information carries the following risks:
ƒInjury to persons from electrical, mechanical and bacteriological factors as well as
electromagnetic fields
ƒEnvironmental damage from discharge of hazardous substances
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 ob-
served!
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.

en Safety
6 WILO SE 2021-05
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.
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

Safety en
Installation and operating instructions Wilo-EMU TR/TRE 212 ... 326-3 7
Personal protective equipment: wear safety harness
Personal protective equipment: wear mouth protection
Personal protective equipment: wear safety goggles
Working alone is prohibited! A second person must be present.
Useful information
2.2 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 and pipework in wet well and dry well installation, lifting equipment, basic
knowledge of wastewater facilities
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
ƒPersonnel have been instructed on locally applicable regulations governing accident
prevention.
ƒPersonnel have read and understood the installation and operating instructions.
2.3 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.
2.4 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, 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.).

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8 WILO SE 2021-05
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).
2.5 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 hand-
ling!
2.6 Transport ƒWear the following protective equipment:
–Safety footwear
–Hard hat
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.
ƒOnly use legally prescribed and approved lifting and hoisting gear.
ƒSelect the lifting gear based on the prevailing conditions (weather, attachment
point, load, etc.).
ƒAlways attach the lifting gear to the attachment points.
ƒEnsure that the lifting gear is securely attached.
ƒEnsure that the hoisting gear is stable.
ƒObserve the swivel range.
ƒEnsure a second person is present to coordinate the procedure if required (e.g. if the
operator’s field of vision is blocked).
ƒStanding under suspended loads is not permitted. Do not move suspended loads
over workplaces where people are present.
ƒObserve packaging instructions:
–Impact-resistant
–Ensure that the product is properly fixed in place.
–Protect it against dust, oil and moisture.
2.7 Installing/dismantling ƒWear the following protective equipment:
–Safety footwear
–Safety gloves for protection against cuts
–Hard hat
–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.
ƒOnly use properly functioning hoisting gear.
ƒObserve the swivel range.
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.

Safety en
Installation and operating instructions Wilo-EMU TR/TRE 212 ... 326-3 9
ƒDisinfect product.
2.8 During operation ƒWear protective equipment according to work regulations.
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. Product may automatically activate 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.
ƒOperator must switch product 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.). If the
product is operated under normal operating conditions, the operator must measure
the sound pressure. From a sound-pressure level of 85dB(A) upward, wear hearing
protection and mark the working area!
2.9 Maintenance tasks ƒWear the following protective equipment:
–Sealed safety goggles
–Safety gloves for protection against cuts
–Safety footwear
ƒDisconnect device from the mains and secure it against being switched on again
without authorisation.
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.
ƒDisinfect product.
Changing operating fluid
In the event of a motor defect, pressure of several bar can build up in the sealing
chamber! This pressure is released when the screw plugs are opened. If screw plugs are
opened without due caution, they can be ejected at high speed! To avoid injuries, ob-
serve the following instructions:
ƒAdhere to the prescribed sequence of work steps.
ƒUnscrew the screw plugs slowly, but never unscrew them completely. As soon as
pressure is released (audible whistling or hissing of air), stop turning the screw plug
any further.
WARNING!Hot operating fluids can also spray out when pressure is released. This
can result in scalding! To avoid injuries, allow the motor to cool down to the am-
bient temperature before carrying out any work!
ƒWhen the pressure has been completely released, fully unscrew the screw plug.
2.10 Operating fluid The product uses the following operating fluids:
ƒThe seal housing is filled with white oil.
ƒThe gear and the pre-chamber are filled with gear oil.
Replace the operating fluids during regular maintenance work and dispose of them ac-
cording to the local guidelines.
2.11 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.
ƒEliminate any risk from electrical current.
ƒFit dangerous components within the system with an on-site guard.
ƒDemarcate and cordon off the working area.

en Application/use
10 WILO SE 2021-05
ƒDefine a personnel work plan for safe workflow.
ƒCarry out a sound pressure measurement. From a sound-pressure level of 85dB(A)
upward, wear hearing protection. Include a note in the work regulations!
Observe the following points when handling the device:
ƒUse is not permitted for persons under the age of 16.
ƒPersons under the age of 18 must be supervised by a technician!
ƒUse is not permitted for persons with limited physical, sensory or mental capacities!
3 Application/use
3.1 Intended use The mixers are suitable for both intermittent and continuous duty in drainage and
sewage (with and without faeces) as well as in sludge:
ƒfor flow generation
ƒfor suspension of solid matter
ƒfor homogenisation
Intended use includes:
ƒCompliance with the specific dimensioning based on the operator requirements.
ƒCompliance with these instructions.
Any other use is regarded as non-intended use.
3.2 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
4 Product description
4.1 Construction The submersible mixer consists of the following main components:
1
23
4
5
6
7
89
Fig.1: Overview of the submersible mixer
1 Propeller
2 Gear, 2-stage
3 Pencil electrode (optional)
4 Sealing chamber
5 Motor
6 Frame for lowering device
7 Handle grip
8 Connection cable
9 Pre-chamber
4.1.1 Propeller Propeller made of solid or composite material, clogging-free thanks to backward-
curved incoming flow edge. NOTICE!The propeller must not emerge during opera-
tion. Observe the specified minimum water immersion according to the configura-
tion!

Product description en
Installation and operating instructions Wilo-EMU TR/TRE 212 ... 326-3 11
TR 212... TR/E 216... TR/E 221... TR/E 226-3... TRE 312... TR/E 316... TR/E 321... TR/E 326-3...
Nominal diameter in mm (in) 1200
(47)
1600
(63)
2100
(83)
2600
(102)
1200
(47)
1600
(63)
2100
(83)
2600
(102)
Number of blades 2 2 2 2 3 3 3 3
Individual blades − • • • • • • •
Propeller pre-assembled • − − − • − − −
On-site propeller installation − • • • − • • •
Material version
GFK vinyl ester (GFRP vinyl ester) • • • • − • • •
PA6G − − − − • − − −
High wear-resistant* • o − − − o − −
Hub (EN-GJL-250/ASTMA48Class35/40B) • • • • − • • •
Hub (1.4571/AISI316TI) − − − − • − − −
• = standard, − = not available, o = optional
* = high wear-resistant propeller made of composite PUR/GFK (PUR/GFRP) material
featuring reinforced leading edge.
4.1.2 Gear Two-stage planetary gear with exchangeable transmissions. Gear bearings have been
dimensioned adequately to absorb resulting stirring forces and not transfer these to the
motor bearing.
4.1.3 Motor The system is driven by a surface-cooled motor in three-phase current version. The
motor is fitted with maintenance-free, permanently lubricated and appropriately di-
mensioned rolling bearings. The motor is cooled by the fluid around it. Waste heat is
transferred directly to the fluid via the motor housing.
The connection cable is sealed water pressure-tight against the fluid and is sealed lon-
gitudinally watertight. The connection cable has bare cable ends and the standard
length is 10m (33ft). Longer cables are available on request.
TR... TRE...
Fluid temperature 3...40°C (37...104°F)** 3...40°C (37...104°F)
Protection class IP68 IP68
Insulation class H H
Number of poles 4, 6, 8 4, 6
Max. switching frequency 15/h 15/h
Max. immersion depth 20m (66ft) 20m (66ft)
Explosion protection ATEX, FM, CSA ATEX, FM
Operating mode, immersed S1 S1
Operating mode, non-immersed - -
Motor efficiency class - IE3/IE4*
Housing material EN-GJL-250 (ASTM A48
Class 35/40B)
EN-GJL-250 (ASTM A48
Class 35/40B)
* = motors in efficiency class IE4 have been specified as “E4” in the motor designation.
** = depending on the motor type and motor capacity fluid temperatures up to 60°C
(140°F) are possible.
4.1.4 Seal The system is sealed by a 3-chamber system:
ƒPre-chamber

en Product description
12 WILO SE 2021-05
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 made of solid silicon carbide is used as the seal
on the fluid side. The mechanical seal also features a packing sleeve. The packing sleeve
ensures a permanently corrosion-resistant fit for the mechanical seal. A rotary shaft
seal made of FPM (FKM) seals towards the gear chamber. The pre-chamber can option-
ally be monitored using a pencil electrode.
Gear chamber
The gear chamber has been filled with gear oil to guarantee continuous lubrication of
the planetary gear and the gear bearings. A solid silicon carbide 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 made of FPM (FKM) seals towards the motor.
4.2 Monitoring devices Overview of possible monitoring devices:
TR 212... TR/TRE 216... TR/TRE 221... TR/TRE 226-3... TRE 312... TR/TRE 316... TR/TRE 321... TR/TRE 326-3...
Internal monitoring devices
Motor compartment/sealing chamber* o o o o o o o o
Motor winding** • • • • • • • •
External monitoring devices
Pre-chamber o o o o o o o o
Legend
− = not available/possible, o = optional, • = standard
* In the Ex version, this monitoring is omitted and not substituted!
** A temperature limiter is fitted as standard. The Ex version as per ATEX also features
an installed temperature controller and limiter.
All the monitoring devices fitted must always be connected!
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.

Product description en
Installation and operating instructions Wilo-EMU TR/TRE 212 ... 326-3 13
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.
4.3 Operating modes
Operating mode S1: Continuous duty
The mixer can operate continuously at the rated load without exceeding the permiss-
ible temperature.
4.4 Operation with frequency con-
verter Operation on the frequency converter is permitted. Refer to the appendix for the relev-
ant requirements!
4.5 Operation in an explosive atmo-
sphere
Approval according to
TR 212... TR 216... TRE 216... TR 221... TRE 221... TR 226-3... TRE 226-3... TRE 312... TR 316... TRE 316... TR 321... TRE 321... TR 326-3... TRE 326-3...
ATEX oooooooooooooo
FM oooooooooooooo
CSA-Ex o 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.
CSA Ex rating
The mixers are suitable for operation in potentially explosive atmospheres:
ƒProtection class: Explosion-proof
ƒCategory: Class 1Division 1
4.6 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

en Product description
14 WILO SE 2021-05
Rating plate
designation
Value
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
4.7 Type key Example: Wilo-EMU TRE 326-3.24-6/16R Ex X
TRE Submersible mixer, horizontal:
ƒTR = mixer with standard asynchronous motor
ƒTRE = mixer with asynchronous motors of motor efficiency class IE3/
IE4
3 Number of blades
26 x100 = nominal propeller diameter in mm
3 Model
24 Rated propeller speed in rpm
6 Number of poles
16 x10 = stator pack length in mm
R Motor version:
ƒR = mixer version
ƒV = mixer version with reduced power
Ex Ex-rated
X Propeller code:
ƒWithout = standard propeller
ƒHV = high wear-resistant propeller
4.8 Scope of delivery ƒMixer with bare cable end
ƒCable length as per customer request
ƒMounted accessories, e.g. frame, pencil electrode, etc.
ƒInstallation and operating instructions
4.9 Accessories ƒLowering device
ƒAuxiliary lifting device
ƒMounting bracket for wall and floor fixation
ƒCable bollard to secure the hoist cable
ƒTerminal stop

Transportation and storage en
Installation and operating instructions Wilo-EMU TR/TRE 212 ... 326-3 15
ƒAdditional rope anchoring
ƒFixation sets with anchor bolts
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, de-
fects 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 asser-
ted.
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 protective equipment!
Danger of (serious) injuries during work. Wear the following protective equipment:
• Safety shoes
• Safety helmet must be worn if lifting equipment are used!
NOTICE
Use only properly functioning lifting equipment!
Use only properly functioning lifting equipment to lift and lower the mixer. Ensure
that the mixer does not become jammed during lifting and lowering. Do not exceed
the maximum bearing capacity of the lifting equipment! Check that lifting equip-
ment is functioning properly before use!
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.2: Attachment point
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.
ƒSeal the open end of the connection cable against water ingress.
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 operator’s field of vision is blocked).

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16 WILO SE 2021-05
5.3 Storage
DANGER
Danger due to fluids which are hazardous to health!
Decontaminate the mixer after removal and before carrying out any other work.
There is a risk of fatal injury. Observe the specifications in the work regulations. The
operator must ensure that the personnel have received and read the work regula-
tions.
WARNING
The propeller blade has sharp edges!
Sharp edges can form on the propeller blades. There is a risk of limbs being severed.
Wear safety gloves to protect against cuts.
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.
Newly supplied mixers can be stored for one year. Contact customer service before
storing the device for more than one year.
When storing the pump, please note the following points:
ƒPlace the mixer (horizontally) on a solid surface and secure it against slipping and
falling over!
CAUTION!Do not set the mixer down on the propeller. Doing so will damage the
propeller or the shaft! In the case of larger propeller diameters, ensure an appro-
priate platform is provided.
ƒThe max. storage temperature is -15°C to +60°C (5°F to 140°F). The max. relative
humidity is 90%, non-condensing. We recommend frost-proof storage. Ambient
temperature: 5 to 25°C (41 to 77°F), relative humidity: 40 to 50%.
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!
ƒProtect the PUR and GRP propeller from direct exposure to sunlight. The extreme
heat can cause damage to the propeller!
ƒTurn the propeller at regular intervals (twice a year). This prevents the bearings from
jamming and renews the lubrication film on the mechanical seal. WARNING!There is
a risk of injury from sharp edges on the propeller!
ƒElastomer parts and the coating are subject to natural brittleness. Contact customer
service if the mixer has to be stored for more than 6months.
After storage, remove any dust and oil from the mixer and check the coatings for dam-
age. Repair damaged coatings before further use.
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 and pipework in wet well and dry well installation, lifting equipment, basic
knowledge of wastewater facilities
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.

Installation and electrical connection en
Installation and operating instructions Wilo-EMU TR/TRE 212 ... 326-3 17
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 ƒFlexible installation with lowering device as stand unit
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! The operator must make
sure that personnel have received and read 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! A second person
must be present for safety reasons.
WARNING
A lack of protective equipment may result in hand and foot injuries or the
risk of falling!
Danger of (serious) injuries during work. Wear the following protective equipment:
• Safety gloves for protection against cuts
• Safety shoes
• Safety harness
• Safety helmet must be worn if lifting equipment is used!

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18 WILO SE 2021-05
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.
NOTICE
Use only properly functioning lifting equipment!
Use only properly functioning lifting equipment to lift and lower the mixer. Ensure
that the mixer does not become jammed during lifting and lowering. Do not exceed
the maximum bearing capacity of the lifting equipment! Check that lifting equip-
ment is functioning properly before use!
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. Ensure adequate ventilation.
Observe protective measures in accordance with work regulations (gas measure-
ment, carry a gas detector with you).
ƒTake immediate countermeasures if there is a build-up of toxic or asphyxiating
gases!
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 6months, carry out the following maintenance
tasks before installation:
ƒRotate propeller.
ƒOil change in sealing, gear and pre-chamber.
6.4.1.1 Rotating the propeller
WARNING
The propeller blade has sharp edges!
Sharp edges can form on the propeller blades. There is a risk of limbs being severed.
Wear safety gloves to protect against cuts.
‡The mixer is not connected to the mains!
‡Protective equipment must be put on!
1. Place the mixer horizontally on a firm surface.
WARNING!Risk of hands being crushed. Ensure that the mixer cannot fall over

Installation and electrical connection en
Installation and operating instructions Wilo-EMU TR/TRE 212 ... 326-3 19
or slip away!
CAUTION!Do not set the mixer down on the propeller! Use an appropriate plat-
form for the propeller diameter.
2. Grip the propeller slowly and carefully and rotate the propeller.
6.4.1.2 Oil change: sealing, gear and pre-
chamber
1
2
3
4
5
6
Fig.3: Oil change
1 Pre-chamber filler hole
2 Gear chamber filler hole
3 Sealing chamber filler hole
4 Pre-chamber drain hole
5 Gear chamber drain hole
6 Sealing chamber drain hole
‡Mixer is not installed.
‡Mixer is not connected to the mains.
‡Wear protective equipment!
1. Position the mixer horizontally on a firm surface.
WARNING!Risk of hands being crushed. Make sure the mixer cannot fall over or
slip out of position!
CAUTION!Do not place the mixer on the propeller! Always place the mixer on a
platform.
2. Position a suitable tank to collect the operating fluid.
3. Unscrew the screw plug of the filler hole:
1 = pre-chamber
2 = gear chamber
3 = sealing chamber
4. Unscrew the drain hole screw plug and drain operating fluid:
4 = pre-chamber
5 = gear chamber
6 = sealing chamber
NOTICE!Vacuum the oil or rinse the sealing chamber to fully drain the system.
5. Check the operating fluid: Notify customer service if the operating fluid contains
metal swarf!
6. Dispose of operating fluid in accordance with local regulations!
7. Clean the drain hole screw plug, replace the seal ring and screw it back in. Max.
tightening torque: 8Nm (5.9ft·lb)!
8. Pour the operating fluid through the filler hole.
⇒ Comply with the specifications for the operating fluid type and quantity!

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20 WILO SE 2021-05
9. Clean the filler hole screw plug, replace the seal ring and screw it back in. Max.
tightening torque: 8Nm (5.9ft·lb)!
10.Restore corrosion protection: Seal screw plug, e.g. with Sikaflex.
6.4.2 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
8
Fig.4: Prepare the mixer
1 Hoisting gear
2 Lifting equipment
3 Shackle for attachment
4 Propeller
5 Platform for secure set-down
6 Supporting block for alignment
7 Frame
8 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. Mount the propeller. See separate installation instructions “Blade installation”.
3. Version with plastic rollers: Loosen linchpins and dismantle plastic rollers and
quick-release axles.
NOTICE!Prepare components for further installation.
4. Lay all connection cables.
5. Mount the cable bracket for the cable anchoring on the edge of the basin.
CAUTION!In case of powerful flows in the basin, install the “additional rope an-
choring”!