Wilo Padus UNI User manual

Pioneering for You
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Wilo-Padus UNI
6084248 • Ed.02/2019-02
en Installation and operating instructions

en
Installation and operating instructions Wilo-Padus UNI 3
Table of contents
1 General information ................................................................................................................................................................. 5
1.1 About these instructions ..................................................................................................................................................................................5
1.2 Copyright ............................................................................................................................................................................................................5
1.3 Subject to change..............................................................................................................................................................................................5
1.4 Warranty..............................................................................................................................................................................................................5
2 Safety......................................................................................................................................................................................... 5
2.1 Identification of safety instructions................................................................................................................................................................5
2.2 Personnel qualifications....................................................................................................................................................................................6
2.3 Electrical work ....................................................................................................................................................................................................6
2.4 Monitoring devices ............................................................................................................................................................................................6
2.5 Use in fluids hazardous to health ....................................................................................................................................................................7
2.6 Transport.............................................................................................................................................................................................................7
2.7 Installing/dismantling........................................................................................................................................................................................7
2.8 During operation ................................................................................................................................................................................................7
2.9 Maintenance tasks.............................................................................................................................................................................................8
2.10 Operating fluid ...................................................................................................................................................................................................8
2.11 Operator responsibilities...................................................................................................................................................................................8
3 Application/use......................................................................................................................................................................... 8
3.1 Intended use.......................................................................................................................................................................................................8
3.2 Improper use.......................................................................................................................................................................................................8
4 Product description.................................................................................................................................................................. 9
4.1 Design..................................................................................................................................................................................................................9
4.2 Monitoring devices ......................................................................................................................................................................................... 10
4.3 Operating modes............................................................................................................................................................................................. 10
4.4 Operation with frequency converter............................................................................................................................................................ 10
4.5 Operation in an explosive atmosphere ........................................................................................................................................................ 10
4.6 Technical data .................................................................................................................................................................................................10
4.7 Type key........................................................................................................................................................................................................... 10
4.8 Scope of delivery............................................................................................................................................................................................. 10
4.9 Accessories ...................................................................................................................................................................................................... 11
5 Transportation and storage................................................................................................................................................... 11
5.1 Delivery............................................................................................................................................................................................................. 11
5.2 Transport.......................................................................................................................................................................................................... 11
5.3 Storage ............................................................................................................................................................................................................. 12
6 Installation and electrical connection .................................................................................................................................. 12
6.1 Personnel qualifications................................................................................................................................................................................. 12
6.2 Installation types............................................................................................................................................................................................. 12
6.3 Operator responsibilities................................................................................................................................................................................ 12
6.4 Installation ....................................................................................................................................................................................................... 13
6.5 Electrical connection...................................................................................................................................................................................... 15
7 Commissioning........................................................................................................................................................................ 17
7.1 Personnel qualifications................................................................................................................................................................................. 17

en
4 WILO SE 2019-02
7.2 Operator responsibilities................................................................................................................................................................................ 17
7.3 Direction of rotation check (for three-phase current motors only)........................................................................................................ 17
7.4 Before switching on........................................................................................................................................................................................ 17
7.5 Switching on and off ...................................................................................................................................................................................... 17
7.6 During operation ............................................................................................................................................................................................. 18
8 Shut-down/dismantling......................................................................................................................................................... 18
8.1 Personnel qualifications................................................................................................................................................................................. 18
8.2 Operator responsibilities................................................................................................................................................................................ 18
8.3 Shut-down....................................................................................................................................................................................................... 19
8.4 Removal............................................................................................................................................................................................................ 19
9 Maintenance and repair.......................................................................................................................................................... 20
9.1 Personnel qualifications................................................................................................................................................................................. 21
9.2 Operator responsibilities................................................................................................................................................................................ 21
9.3 Operating fluid ................................................................................................................................................................................................ 21
9.4 Maintenance intervals.................................................................................................................................................................................... 21
9.5 Maintenance measures .................................................................................................................................................................................. 21
10 Faults, causes and remedies .................................................................................................................................................. 23
11 Spare parts............................................................................................................................................................................... 25
12 Disposal.................................................................................................................................................................................... 25
12.1 Oils and lubricants........................................................................................................................................................................................... 25
12.2 Protective clothing .........................................................................................................................................................................................25
12.3 Information on the collection of used electrical and electronic products.............................................................................................. 25

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

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

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

en Application/use
8 WILO SE 2019-02
must be worn for sound pressure levels of 85dB(A) and above
and this must be noted in the work regulations!
2.9 Maintenance tasks
ƒWear the following protective equipment:
–Closed safety goggles
–Safety shoes
–Safety gloves for protection against cuts
ƒAlways carry out maintenance tasks outside the operating
space/installation site.
ƒOnly carry out maintenance tasks mentioned in these installa-
tion and operating instructions.
ƒOnly original parts from the manufacturer may be used for
maintenance and repairs. Use of parts other than the original
parts releases the manufacturer from any liability.
ƒCollect any leakage of fluid and operating fluid immediately
and dispose of it according to the locally applicable guidelines.
ƒStore tools at the designated locations.
ƒAfter completing work, reattach all safety and monitoring
devices and check that they function properly.
Changing operating fluid
In case of a defect, a pressure of several bar can build up in the
motor! This pressure escapes when the screw plugs are opened.
If screw plugs are opened without due caution, they can be ejec-
ted at high speed! To avoid injuries, observe the following in-
structions:
ƒAdhere to the prescribed sequence of work steps.
ƒUnscrew the screw plugs slowly, but never unscrew them
completely. As soon as the pressure escapes (audible whistling
or hissing of air), stop turning the screw plug any further.
WARNING!Hot operating fluids can also spray out when the
pressure is escaping. This can result in scalding! To avoid in-
juries, allow the motor to cool down to the ambient tem-
perature before carrying out any work!
ƒWhen the pressure has completely dissipated, fully unscrew
the screw plug.
2.10 Operating fluid
In the sealing chamber, the motor is filled with white oil. Operat-
ing fluid must be replaced during regular maintenance work and
disposed off according to the local guidelines.
2.11 Operator responsibilities
ƒInstallation and operating instructions must be in a language
which the personnel can understand.
ƒMake sure that the personnel is relevantly trained for the spe-
cified work.
ƒProvide the necessary protective equipment and make sure
that the personnel wears it.
ƒSafety and information signs mounted on the device must be
always legible.
ƒTrain the personnel pertaining to the functioning of the sys-
tem.
ƒEliminate risk from electrical current.
ƒEquip hazardous components inside the system with an on-
site guard.
ƒIdentify and cordon off the work area.
ƒTo ensure safe working practice, define the responsibilities of
the employees.
Children and persons younger than 16years or with reduced
physical, sensory or mental capacities or limited experience are
prohibited from handling the product! A technician must super-
vise persons younger than 18years!
3 Application/use
3.1 Intended use
The submersible pumps are suitable for pumping:
ƒSewage not containing faeces (as per EN12050-2)
ƒWastewater (with small amounts of sand and gravel)
ƒFluids with a pHvalue of >4.5
The submersible pumps in material version “B” are additionally
suitable for pumping:
ƒLake- and seawater with a temperature of max. 20°C
ƒSwimming pool water with a chloride content of max. 400mg/
l
ƒAggressive fluids (condensate, distilled water) with a pHvalue
of >3.5
3.2 Improper use
DANGER
Explosion due to pumping of explosive fluids!
Pumping of highly flammable and explosive fluids
(gasoline, kerosene, etc.) in pure form is strictly pro-
hibited. There is a risk of fatal injury due to explosion!
The pumps are not designed for these fluids.
DANGER
Danger due to fluids hazardous to health!
If the pump is used in fluids hazardous to health, de-
contaminate the pump after dismantling and before
carrying out any other work! There is a risk of fatal
injury! Observe the specifications in the work regula-
tions! The operator must make sure that the person-
nel have received and read the work regulations!

Product description en
Installation and operating instructions Wilo-Padus UNI 9
CAUTION
Use in biogas applications forbidden!
The fluids in biogas applications are highly aggressive.
These fluids will destroy the pump. Use with these
fluids is strictly forbidden!
The submersible pumps must not be used for pumping of:
ƒUntreated sewage
ƒSewage containing faeces (as per EN12050-1)
ƒDrinking water
ƒFluids containing hard components (such as stones, wood,
metal, etc.)
ƒFluids containing high quantities of abrasive contents (e.g.
sand, gravel).
Intended use requires compliance with this manual. Any other use
is regarded as non-compliant with the intended use.
4 Product description
4.1 Design
Submersible drainage pump as a submersible monobloc unit for
intermittent operation for wet well installation.
1
2
3
4
5
6
Fig.1: Overview
1 Handle/attachment point
2 Motor housing
3 Hydraulics housing
4 Pressure port
5 Strainer
6 Connection cable
4.1.1 Hydraulics
Centrifugal hydraulics with open, multi-channel impeller and ver-
tical threaded connection on the pressure side. The hydraulics are
not self-priming, in other words, the fluid must flow in either au-
tomatically or with supply pressure.
4.1.2 Motor
The drive versions used are single-phase current and three-phase
current surface-cooled motors. The motor is cooled by the fluid
around it. The waste heat is transferred directly to the fluid via the
motor housing. The motor may emerge during operation.
With single-phase current motors, the operating capacitor is in-
tegrated in the motor. The connection cable is available in the fol-
lowing versions:
ƒSingle-phase current version:
–With shockproof plug
–With shockproof plug and fitted with a float switch
ƒThree-phase current version:
–With bare cable end
–With CEE plug and fitted with a float switch
4.1.3 Seal
The seal for the fluid and the motor compartment is made via two
mechanical seals. The sealing chamber between the mechanical
seals is filled with medical white oil.
4.1.4 Material
ƒPump housing: PP-GF30
ƒImpeller: PP-GF30
ƒMotor housing: 1.4301 (AISI304)
ƒShaft: 1.4401 (AISI316)
ƒSeal on the fluid side: SiC/SiC
ƒSeal on the motor side: C/Cr
ƒStatic seal: NBR (nitrile)
NOTICE!In material version “B”, all parts that come in contact
with the fluid are made of stainless steel 1.4401 (AISI316).
4.1.5 Fitted accessories
Float switch
In the “A” and “VA”version, the pump is equipped with a float
switch. Depending on the fill level, it is possible to switch the
pump on and off automatically using the float switch.
Plug
In the “P” and “A” version, a shockproof plug is attached for
single-phase AC motors and a CEE plug is attached for three-
phase current motors. The plug is designed for use in commer-
cially available shock-proof or CEE sockets and is not overflow-
proof.

en Product description
10 WILO SE 2019-02
4.2 Monitoring devices
Monitoring of motor winding
The thermal motor monitoring protects the motor winding from
overheating. Temperature limiter with bimetallic strip is fitted as
standard.
Thermal motor monitoring is self-switching for single-phase cur-
rent motors, i.e. if the motor is switched off due to overheating
and then cools down, it is automatically switched on again.
For three-phase current motors, the thermal motor monitoring
must be connected in the switchgear or plug.
4.3 Operating modes
Operating mode S1: Continuous duty
The pump can operate continuously at the rated load without ex-
ceeding the permissible temperature.
Operating mode S2: Short-time duty
The maximum operating period is specified in minutes,
e.g.S2-15. The pause must last until the machine temperature
no longer differs from the temperature of the coolant by more
than 2K.
Operating mode S3: Intermittent periodic duty
This operating mode defines a switching cycle in a combination
of periods of operation and standstill. Specified value (e.g.
S325%) relates to the operating time. The switching cycle has a
duration of 10min.
If two values (e.g. S325%/120s) are specified, the first value
relates to the operating time. The second value specifies the max.
period of the switching cycle.
4.4 Operation with frequency converter
Operation on the frequency converter is not permitted.
4.5 Operation in an explosive atmosphere
Operation in an explosive atmosphere is not permitted.
4.6 Technical data
General
Date of manufacture [MFY] See rating plate
Mains connection [U/f] See rating plate
Power consumption [P1] See rating plate
Rated power [P2] See rating plate
Max. delivery head [H] See rating plate
Max. volume flow [Q] See rating plate
Activation type [AT] See rating plate
Fluid temperature [t] 3…40°C
Protection class IP68
Insulation class [Cl.] F
Speed [n] See rating plate
Max. switching frequency 30/h
Max. immersion depth [8] See rating plate
Cable length (standard version) 10m
Explosion protection -
Operating modes
Immersed [OTs] S1
Non-immersed [OTe] S2-15, S3 10%*
Pressure connection
UNIM05... G2"
* Operating mode S325% is permitted if the necessary motor
cooling is guaranteed before the motor is switched on again! To
ensure the required cooling, the motor must be completely im-
mersed for at least 1min.
Statement of date of manufacture
The date of manufacture is stated in accordance with ISO8601:
JJJJWww
ƒJJJJ = year
ƒW = abbreviation for week
ƒww = calendar week
4.7 Type key
Example: Wilo-Padus UNI M05B/T15-540/A
UNI Series
M Impeller shape=multi-channel impeller
05 Nominal diameter of pressure connection
B
Material version
- n/a = standard version
- B = version in V4A
T Mains connection version: M = 1~, T = 3~
15 /10 =rated power P2 inkW
5 Mains connection frequency: 5 =50Hz, 6 =60Hz
40 Key for rated voltage
A
Additional electrical equipment:
n/a = with bare cable end
A= with float switch and plug
VA = with vertical float switch and plug
P= with plug
4.8 Scope of delivery
ƒPump with 10m (33ft) cable
ƒSingle-phase current version with
–Shockproof plug
–Float switch and shockproof plug
ƒThree-phase current version with

Transportation and storage en
Installation and operating instructions Wilo-Padus UNI 11
–Bare cable end
–Float switch and CEE plug
ƒInstallation and operating instructions
4.9 Accessories
ƒCable lengths in fixed length increments of 10m (33ft) up to
max. 30m (99ft) in single-phase current version or max. 50m
(164ft) in three-phase current version
ƒSuspension unit
ƒLevel control devices
ƒFixation accessories and chains
ƒSwitchgear, relays and plugs
5 Transportation and storage
5.1 Delivery
After receiving the shipment, this must be checked immediately
for defects (damage, completeness). Defects must be noted on
the freight documentation! Furthermore, defects must be notified
to the transport company or the manufacturer immediately on the
day of receipt of shipment. Subsequently notified defects can no
longer be asserted.
5.2 Transport
WARNING
Standing under suspended loads!
Never allow anyone to stand under suspended loads!
Danger of (serious) injuries caused by falling parts.
Loads may not be carried over work places where
people are present!
WARNING
Head and foot injuries due to a lack of protect-
ive equipment!
Danger of (serious) injuries during work. Wear the fol-
lowing protective equipment:
• Safety shoes
• Safety helmet must be worn if lifting equipment
are used!
NOTICE
Use only properly functioning lifting equip-
ment!
Use only properly functioning lifting equipment to lift
and lower the pump. Ensure that the pump does not
become jammed during lifting and lowering. Do not
exceed the maximum bearing capacity of the lifting
equipment! Check that lifting equipment is function-
ing properly before use!
CAUTION
Soaked packaging may tear!
The product may fall on the ground if unprotected
and may be damaged. Lift wet packaging carefully
and replace it immediately!
Only remove the outer packaging at the place of utilisation to en-
sure that the pump is not damaged during transport. Use tear-
proof plastic sacks of sufficient size to package used pumps for
transport in a leak-proof manner.
The following points must also be observed:
Fig.2: Attachment point
ƒAdhere to the applicable national safety regulations.
ƒUse legally specified and approved lifting gear.
ƒSelect the lifting gear based on the existing conditions
(weather, attachment point, load, etc.).
ƒOnly attach the lifting gear to the attachment point. Fix with a
shackle.
ƒUse lifting equipment with sufficient bearing capacity.
ƒThe stability of the lifting equipment must be ensured during
operation.
ƒWhen using lifting equipment, a second person must be
present to coordinate the procedure if required (e.g. if the op-
erator’s field of vision is blocked).

en Installation and electrical connection
12 WILO SE 2019-02
5.3 Storage
DANGER
Danger due to fluids hazardous to health!
If the pump is used in fluids hazardous to health, de-
contaminate the pump after dismantling and before
carrying out any other work! There is a risk of fatal
injury! Observe the specifications in the work regula-
tions! The operator must make sure that the person-
nel have received and read the work regulations!
WARNING
Sharp edges on the impeller and suction port!
Sharp edges can form on the impeller and suction
port. There is danger of limbs being severed! Pro-
tective gloves must be worn to protect from cuts.
CAUTION
Total damage due to moisture ingress
Moisture ingress in the power supply cable damages
the power supply cable and the pump! Never im-
merse the end of the power supply cable in a fluid
and firmly seal it during storage.
Newly supplied pumps can be stored for one year. Contact cus-
tomer service to store the pump for more than one year.
The following must be observed for storage:
ƒPlace the pump upright (vertical) on a firm bearing surface and
secure it against slipping and falling over!
ƒThe max. storage temperature is -15°C to +60°C (5°F to
140°F) at a max. relative humidity of 90%, non-condensing.
Frost-proof storage at a temperature of 5°C to 25°C (41°F to
77°F) with relative humidity of 40% to 50% is recommen-
ded.
ƒDo not store the pump in rooms in which welding work is car-
ried out. The resulting gases or radiation can corrode the
elastomer parts and coatings.
ƒSeal the suction and pressure connection tightly.
ƒProtect power supply cables against kinking and damage.
ƒProtect the pump from direct sunlight and heat. Extreme heat
can cause damage to the impellers and the coating!
ƒImpellers must be turned by 180° at regular intervals (3–
6months). This prevents locking of the bearings and renews
the lubrication film of the mechanical seal. WARNING!There
is a risk of injury due to sharp edges on the impeller and
suction port!
ƒElastomer parts and the coating are subject to natural brittle-
ness. Contact customer service if the pump must be stored for
more than 6months.
After storage, remove any dust and oil from the pump and check
the coating for damage. Repair damaged coatings before further
use.
6 Installation and electrical connection
6.1 Personnel qualifications
ƒElectrical work: A qualified electrician must carry out the elec-
trical work.
ƒInstallation/dismantling: The technician must be trained in the
use of the necessary tools and fixation materials for the relev-
ant construction site.
6.2 Installation types
ƒVertical portable wet well installation
The following installation types are not permitted:
ƒVertical stationary wet well installation with suspension unit
ƒVertical stationary dry well installation
ƒHorizontal installation
6.3 Operator responsibilities
ƒObserve the locally applicable accident prevention and safety
regulations of trade associations.
ƒObserve all regulations for working with heavy loads and un-
der suspended loads.
ƒProvide protective equipment and ensure that the protective
equipment is worn by personnel.
ƒObserve local regulations on the latest technology for
wastewater and sewage disposal (without faeces).
ƒAvoid pressure surges!
Pressure surges can occur in long pressure pipes with steep
terrain. These pressure surges can lead to the destruction of
the pump!
ƒEnsure the cooling time of the motor depending on the oper-
ating conditions and the size of the pump chamber.
ƒStructural components and foundations must be of sufficient
stability in order to allow the device to be fixed in a secure and
functional manner. The operator is responsible for the provi-
sion and suitability of the building/foundation!
ƒCheck that the available consulting documents (installation
plans, design of the operating space, inflow conditions) are
complete and correct.

Installation and electrical connection en
Installation and operating instructions Wilo-Padus UNI 13
6.4 Installation
DANGER
Risk of fatal injury due to dangerous lone
working practices!
Work in chambers and narrow rooms as well as work
involving risk of falling are dangerous work. Such
work may not be carried out autonomously! A second
person must be present for safety reasons.
WARNING
Hand and foot injuries due to lack of protect-
ive equipment!
Danger of (serious) injuries during work. Wear the fol-
lowing protective equipment:
• Safety gloves for protection against cuts
• Safety shoes
• Safety helmet must be worn if lifting equipment
are used!
NOTICE
Use only properly functioning lifting equip-
ment!
Use only properly functioning lifting equipment to lift
and lower the pump. Ensure that the pump does not
become jammed during lifting and lowering. Do not
exceed the maximum bearing capacity of the lifting
equipment! Check that lifting equipment is function-
ing properly before use!
NOTICE
Emerging of the motor during operation
If the motor emerges during operation, observe the
instructions for “non-immersed operating mode”! To
ensure the necessary cooling of the motor for con-
tinuous duty, the motor must be completely im-
mersed before re-activation!
ƒPrepare operating space/installation location as follows:
–Clean, free of coarse solids
–Dry well
–Frost-free
–Decontaminated
ƒTake immediate countermeasures if there is a build-up of toxic
or suffocating gases!
ƒUse the handle for lifting, lowering and transporting the pump.
Never carry or drag the pump by the power supply cable!
ƒIt must be possible to attach lifting equipment safely. The
storage place and the operating space/installation site must be
accessible with the lifting equipment. The set-down location
must have a solid bearing surface.
ƒAttach the lifting gear to the handle using a shackle. Only use
lifting gear which has been technically approved.
ƒThe routed power supply cables must allow safe operation.
Check whether the cable cross-section and the cable length
are sufficient for the selected installation type.
ƒThe corresponding IP class must be observed when using
switchgear. Install the switchgear overflow-proof and outside
potentially explosive areas!
ƒAvoid air intake into the fluid, use baffles or deflector plates for
the inlet. Air which has entered the system can collect in the
pipe system and lead to impermissible operating conditions. Air
pockets must be removed via ventilation systems!
ƒA dry run of the pump is prohibited! Avoid air pockets in the
hydraulics housing or in the pipe system. Ensure the water level
never falls below the minimum. The installation of a dry-run-
ning protection is recommended!
6.4.1 Maintenance tasks
After a storage period of more than 6months, check the oil in the
sealing chamber prior to installation:
1
Fig.3: Check the oil
1 Screw plug sealing chamber
‡Pump is not installed.
‡Pump is not connected to the mains.
‡Protective equipment has been put on!
1. Place the pump horizontally on a firm surface. The screw
plug points upwards. WARNING!Risk of hands being
crushed. Ensure that the pump cannot fall over or slip
away!
2. Unscrew the screw plug.

en Installation and electrical connection
14 WILO SE 2019-02
3. Place a suitable tank to collect the operating fluid.
4. Drain the operating fluid: Rotate the pump until the
opening points downwards.
5. Check the operating fluid:
⇒ If the operating fluid is clear, reuse operating fluid.
⇒ If the operating fluid is contaminated (black), fill
with new operating fluid. Dispose of operating fluid
in accordance with the local regulations!
⇒ Notify customer service if an operating fluid con-
tains metal chips!
6. Pour in operating fluid: Rotate the pump until the open-
ing points upwards. Fill-in the operating fluid into the
opening.
⇒ Comply with the specifications for operating fluid
locations and quantity! When recycling the operat-
ing fluid, check the quantity and if required adjust
it!
7. Clean the screw plug, replace the seal ring and screw it
back in. Max. tightening torque: 8Nm (5.9ftlb)!
6.4.2 Portable wet well installation
WARNING
Risk of burns from hot surfaces!
Motor housing can become hot during operation. It
may cause burns. Allow the pump to cool down at
ambient temperature after switching it off!
WARNING
Separation of pressure hose!
Separation or movement of the pressure hose can
lead to (serious) injuries. Securely attach the pressure
hose to the outlet! Prevent buckling of the pressure
hose.
NOTICE
Pumping problems due to water level being
too low
The hydraulics are self-venting. Smaller air cushions
are resorbed during pumping. If the fluid is lowered
too much, separation of the volume flow may occur.
The minimum permissible water level must reach the
upper edge of the hydraulics housing!
For portable installation, the pump is equipped with a strainer.
The strainer filters coarse solids out of the fluid and enables se-
cure standing if placed on a solid load bearing surface. This allows
the pump to be installed anywhere in the operating space/install-
ation location. To prevent sinking in, a hard base must be used at
the installation location in case of soft load bearing surfaces. A
pressure hose or pipework is connected on the pressure side.
CAUTION!If the motor emerges during operation, observe the
operating mode for non-immersed operation (S2-15, S3
10%*)!
* Operating mode S325% is permitted if the necessary motor
cooling is guaranteed before the motor is switched on again! To
ensure the required cooling, the motor must be completely im-
mersed for at least 1min.
Work steps
2
3
4 4
S1
S2, S3
1
5
6
Fig.4: Wet well installation, portable
1 Pump with integrated pump support foot
2 Hose connection
3Storz pipe coupling and Storz hose coupling (available as
accessories)
4 Pressure hose or pressure pipe
5 Attachment point
6 Lifting equipment
‡Pressure connection prepared: Hose connection or Storz
coupling fitted.
1. Use a shackle to attach the hoisting gear to the attach-
ment point of the pump.
2. Lift and align the pump at the installation location.
3. Place the pump on a solid load bearing surface. CAU-
TION!Prevent the pump sinking in!
4. Lay the pressure hose and fasten it to a certain point
(e.g. drainage). DANGER!Separation or movement of
the pressure hose can lead to (serious) injuries! Secure
the pressure hose at the outlet.
5. Lay the connection cable properly. CAUTION!Do not
damage the connection cable!

Installation and electrical connection en
Installation and operating instructions Wilo-Padus UNI 15
▶ The pump is installed, the qualified electrician can make
the electrical connection.
6.4.3 Level control
With a level control device, the current fill levels are determined
and the pump is switched on and off automatically depending on
the fill levels. Fill levels are recorded by using different sensor
types (float switches, pressure and ultrasound measurements or
electrodes). The following must be observed when using a level
control device:
ƒFloat switches can move freely!
ƒThe water level must not fall below the minimum permissible!
ƒThe maximum switching frequency must not be exceeded!
ƒIf the fill levels fluctuate strongly, a level control with two
measuring points is recommended. This makes it possible to
achieve larger differential gaps.
Use of the attached float switch
The “A” and “VA”versions are equipped with a float switch. The
pump is switched on and off depending on the fill level. The
switching level is defined as follows:
ƒAversion with float switch: by the cable length
ƒVAversion with vertical float switch: by the position of the
floater on the guide pin (factory setting)
The factory setting for the floater offers the maximum switching
volume. The floater setting can be changed if required. NO-
TICE!The top floater is set to the upper switching point. If the
switching point is reset downwards, the pump will no longer be
completely submerged in the fluid. This means that the pump
can only be operated in intermittent periodic duty S3!
Adjusting the floater switching point.
‡Pump is out of operation.
‡Pump disconnected from mains.
1. Undo interior hexagonal head screw on floater.
2. Set the required switching point: Push the floater up-
wards or downwards.
3. Fixing the floater: Tighten interior hexagonal head screw
on floater.
▶ New switching points are set.
Use of on-site level controls
When using an on-site level control device, refer to the manufac-
turer’s own installation and operating instructions for specifica-
tions on the installation.
6.4.4 Dry-running protection
Dry-running protection must prevent the pump from operating
without fluid and air from entering the hydraulics. The minimum
permissible fill level must be determined with the help of a signal
transmitter. Once the specified limit value is reached, the pump
must be deactivated with an appropriate signal. Dry-running pro-
tection can expand the available level controls by an additional
measuring point or function as an independent switch-off device.
Depending on the system security, the pump can be restarted au-
tomatically or manually. Installation of dry-running protection is
recommended for optimum operational reliability.
6.5 Electrical connection
DANGER
Risk of death due to electrocution!
Improper conduct when carrying out electrical work
can lead to death due to electric shock! Electrical
work must be carried out by a qualified electrician in
accordance with the locally applicable regulations.
ƒThe mains connection must match the specifications on the
rating plate.
ƒPower supply on mains side for three-phase current motors
with clockwise rotating field.
ƒLay the connection cable in accordance with the locally applic-
able regulations and connect it according to the wire assign-
ment.
ƒConnect the monitoring devices and check their function.
ƒEarth the device properly in accordance with applicable local
regulations.
6.5.1 Fuse on mains side
Circuit breaker
The size and switching characteristics of the circuit breakers must
conform to the rated current of the connected product. Observe
local regulations.
Motor protection switch
Make provision for an on-site motor protection switch for devices
without a plug! The minimum requirement is a thermal relay/mo-
tor 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. over-
voltage, undervoltage or phase failure relay, etc.).
Residual-current device (RCD)
Comply with the regulations of the local energy supply company!
The use of a residual-current device is recommended.
If persons come into contact with the device and conductive flu-
ids, secure the connection with a residual-current device (RCD).
6.5.2 Maintenance tasks
Carry out the following maintenance tasks prior to installation:

en Installation and electrical connection
16 WILO SE 2019-02
ƒCheck the insulation resistance of the motor winding.
ƒTest the resistor of the temperature sensor.
If the measured values differ from the specifications, moisture
may have penetrated into the motor or the power supply cable or
the monitoring device is defective. Contact customer service in
the event of a fault.
6.5.2.1 Checking the insulation resistance of the motor wind-
ing
Use an insulation tester to measure the insulation resistance
(measuring voltage=1000V). Observe the following values:
ƒAt the time of initial commissioning: Insulation resistance may
not be less than 20MΩ.
ƒFor further measurements: Value must be greater than 2MΩ.
NOTICE!For motors with an integrated capacitor, short-circuit
the windings prior to checking!
6.5.2.2 Test the resistor of the temperature sensor
Measure the resistor of the temperature sensors with an ohm-
meter. The bimetallic strips must have a measured value of
0Ohm (passage).
6.5.3 Connection of the single-phase current motor
U1/Z1
bn
U2
bu
Cr
M 1~
gn-ye
LNPE
Fig.5: Connection diagram single-phase current motor
Wire colour Terminal
Brown (bn) L
Blue (bu) N
Green/yellow (gn-ye) Earth
The single-phase current version is equipped with a shockproof
plug. The connection to the mains is established by inserting the
plug into a socket. The plug is not overflow-proof. Install the
socket so that it is overflow-proof! Observe the information on
the protection class (IP) of the plug.
DANGER!If the pump is connected directly to the switchgear,
dismantle the plug and arrange for the electrical connection to
be carried out by a qualified electrician!
6.5.4 Three-phase current motor connection
W
5 1 2
V
4
U
3
M 3~
gn-ye
L3L2 2120L1PE
250 V (AC); 2,5 A; cos φ = 1
Fig.6: Connection diagram three-phase current motor
Wire number Designation Terminal
1 20 WSK
2 21 WSK
3 U L1
4 V L2
5 W L3
Green/yellow (gn-ye) Earth PE
For three-phase current motors, a clockwise rotating field must
be available. The three-phase current version is equipped with a
CEE plug or with a bare cable end:
ƒIf a CEE plug is supplied, connection to the mains is estab-
lished by inserting the plug into a socket. The plug is not
overflow-proof. Install the socket so that it is overflow-
proof! Observe the information on the protection class (IP) of
the plug.
ƒIf there is a bare cable-end, the pump must be connected dir-
ectly to the switchgear. DANGER!If the pump is connected
directly to the switchgear, arrange for the electrical con-
nection to be carried out by a qualified electrician!
6.5.5 Monitoring device connection
All monitoring device must be connected!
6.5.5.1 Monitoring of motor winding
Single-phase current motor
Thermal motor monitoring is self-switching for single-phase cur-
rent motors. The monitoring function is always active and does
not need to be connected separately.
Three-phase current motor with bimetallic strip
Bimetallic strips are directly connected to the switchgear or via an
evaluation relay.
Connection values: max. 250V(AC), 2.5A, cos φ=1
When the threshold is reached, deactivation must take place.

Commissioning en
Installation and operating instructions Wilo-Padus UNI 17
In the version with an attached plug, the thermal motor monitor-
ing is pre-wired and set to the correct value in the plug.
6.5.6 Motor protection adjustment
Motor protection must be set depending on the selected activa-
tion type.
6.5.6.1 Direct activation
At full load, set the motor protection switch to the rated current
(see rating plate). At partial load, it is recommended to set the
motor protection switch 5% above the current measured at the
duty point.
6.5.7 Operation with frequency converter
Operation on the frequency converter is not permitted.
7 Commissioning
WARNING
Foot injuries due to a lack of protective equip-
ment!
Danger of (serious) injuries during work. Wear safety
shoes!
7.1 Personnel qualifications
ƒElectrical work: A qualified electrician must carry out the elec-
trical work.
ƒOperation/control: Operating personnel must be instructed in
the functioning of the complete system.
7.2 Operator responsibilities
ƒProviding installation and operating instructions by the pump
or at a place specially reserved for it.
ƒMaking the installation and operating instructions available in
the language of the personnel.
ƒMaking sure that the installation and operating instructions are
read and understood by all personnel.
ƒAll safety devices and emergency cut-outs on the system-side
must be active and checked to ensure that they work properly.
ƒThe pump is suitable for use under the specified operating
conditions.
7.3 Direction of rotation check (for three-phase current
motors only)
The pump is factory-checked and adjusted to the correct direc-
tion of rotation for a clockwise rotating field. Connection is made
in accordance with the specifications in chapter “Electrical con-
nection”.
Direction of rotation check
A qualified electrician checks the rotating field at the mains con-
nection with a rotating field-test device. For the correct direction
of rotation, a clockwise rotating field must be available at the
mains connection. The pump is not approved for operation with a
counter-clockwise rotating field! CAUTION!If the direction of
rotation is checked with a test run, comply with the ambient
and operating conditions!
Incorrect direction of rotation
If the direction of rotation is incorrect, exchange the two phases
at the mains connection.
7.4 Before switching on
Check the following prior to activation:
ƒCheck whether the device has been installed properly and in
accordance with the locally applicable regulations:
–Has the pump been earthed?
–Layout of power supply cable tested?
–Electrical connection made properly?
–Mechanical components attached correctly?
ƒCheck level control:
–Float switches can move freely?
–Switching level tested (pump on, pump off, minimum water
level)?
–Additional dry-running protection installed?
ƒTest operating conditions:
–Min./max. temperature of the fluid tested?
–Max. immersion depth tested?
–Operating mode defined depending on the minimum water
level?
–Maximum switching frequency adhered to?
ƒCheck installation location/operating space:
–Pipe system on the pressure side free of deposits?
–Inlet or pump sump cleaned or free of deposits?
–All gate valves open?
–Minimum water level defined and monitored?
The hydraulics housing must be filled completely with the
fluid and there must be no air cushions in the hydraulics.
NOTICE!Provide suitable venting devices if there is a risk
of air cushions being formed in the system!
7.5 Switching on and off
During the start process, the rated current is temporarily ex-
ceeded. During operation, the rated current may no longer be ex-
ceeded. CAUTION!If the pump does not start, switch off the
pump immediately. Remove the fault before reactivating the
pump!
Place pumps which are installed as portable pumps on a firm sur-
face so they are level. If pumps have fallen over, place them up-
right again before activating them. Securely attach the pump with
screws in case of difficult surfaces.

en Shut-down/dismantling
18 WILO SE 2019-02
Pump with attached float switch and plug
ƒSingle-phase current version: After inserting the plug into the
socket, the pump is ready for operation. The pump is switched
on and off automatically depending on the fill level.
ƒThree-phase current version: After inserting the plug into the
socket, the pump is ready for operation. The pump is con-
trolled via two switches on the plug:
–MANUAL/AUTO: Determines if the pump is switched on
and off directly (MANUAL) or depending on the fill level
(AUTO).
–ON/OFF: Switch pump on and off.
Pump with vertical float switch
After inserting the plug into the socket, the pump is ready for op-
eration. The pump is switched on/off depending on the selected
operating mode of the float switch:
ƒ“AUTO” operating mode: The pump switches on and off de-
pending on the fill level.
ƒ“MANUEL” operating mode: The pump switches on immedi-
ately after the plug has been inserted into the socket.
NOTICE!Set the operating mode at the switch. The switch is
located above the upper float switch.
Pump with attached plug
ƒSingle-phase current version: After inserting the plug in the
socket, the pump is switched on.
ƒThree-phase current version: After inserting the plug into the
socket, the pump is ready for operation. The pump is switched
on and off with the ON/OFF switch.
Pumps with bare cable end
The pump must be switched on and off using a separate operat-
ing point (on/off switch, switchgear) provided by the customer.
7.6 During operation
WARNING
Amputation of limbs due to rotating compon-
ents!
No persons must be present in the work area of the
pump! There is risk of (serious) injuries due to rotat-
ing components! No persons must be present in the
work area of the pump during start-up or operation.
WARNING
Risk of burns from hot surfaces!
Motor housing can become hot during operation. It
may cause burns. Allow the pump to cool down at
ambient temperature after switching it off!
NOTICE
Pumping problems due to water level being
too low
The hydraulics are self-venting. Smaller air cushions
are resorbed during pumping. If the fluid is lowered
too much, separation of the volume flow may occur.
The minimum permissible water level must reach the
upper edge of the hydraulics housing!
When operating the pump, observe the locally applicable regula-
tions on the following topics:
ƒWork safety
ƒAccident prevention
ƒHandling electrical machines
Strictly adhere to the responsibilities of the personnel specified
by the operator. All personnel are responsible for ensuring that
the responsibilities of the personnel and the regulations are ob-
served!
Due to their design, centrifugal pumps have rotating parts that
are easily accessible. Depending on the operating condition,
sharp edges can develop on these parts. WARNING!This can lead
to cuts and limbs may be severed! Check the following at regu-
lar intervals:
ƒOperating voltage (+/-10% of the rated voltage)
ƒFrequency (+/-2% of the rated frequency)
ƒPower consumption between individual phases (max.5%)
ƒVoltage difference between the individual phases (max.1%)
ƒMax. switching frequency
ƒMinimum water submersion depending on the operating mode
ƒInlet: no air intake
ƒLevel control device/dry-running protection: Switching points
ƒQuiet/low-vibration running
ƒAll gate valves open
8 Shut-down/dismantling
8.1 Personnel qualifications
ƒOperation/control: Operating personnel must be instructed in
the functioning of the complete system.
ƒElectrical work: A qualified electrician must carry out the elec-
trical work.
ƒInstallation/dismantling: The technician must be trained in the
use of the necessary tools and fixation materials for the relev-
ant construction site.
8.2 Operator responsibilities
ƒLocally applicable accident prevention and safety regulations
of trade associations.

Shut-down/dismantling en
Installation and operating instructions Wilo-Padus UNI 19
ƒObserve regulations for working with heavy loads and under
suspended loads.
ƒProvide the necessary protective equipment and make sure
that the personnel wears it.
ƒProvide adequate aeration in closed rooms.
ƒTake immediate countermeasures if there is a build-up of toxic
or suffocating gases!
8.3 Shut-down
The pump is deactivated during decommissioning, but remains in-
stalled. This ensures that the pump is always ready for operation.
‡To protect the pump from frost and ice, always immerse
the pump completely in the fluid.
‡The temperature of the fluid must always be above +3°C
(+37°F).
1. Switch off the pump at the operating point.
2. Secure the operating point against being switched on
again by unauthorised persons (e.g. lock main switch).
▶ The pump is out of operation and can now be dis-
mantled.
If the pump remains installed after decommissioning, observe the
following:
ƒEnsure that the prerequisites for decommissioning are main-
tained for the complete period of decommissioning. If these
prerequisites cannot be guaranteed, dismantle the pump after
decommissioning!
ƒFor an extended period of decommissioning, carry out a 5-
minute function test at regular intervals (monthly to quarterly).
CAUTION!A function test may only be carried out under the
applicable operating conditions. A dry run is not permitted!
Non-compliance can result in irreparable damage!
8.4 Removal
DANGER
Danger due to fluids hazardous to health!
If the pump is used in fluids hazardous to health, de-
contaminate the pump after dismantling and before
carrying out any other work! There is a risk of fatal in-
jury! Observe the specifications in the work regula-
tions! The operator must make sure that the person-
nel have received and read the work regulations!
DANGER
Risk of death due to electrocution!
Improper conduct when carrying out electrical work
can lead to death due to electric shock! Electrical
work must be carried out by a qualified electrician in
accordance with the locally applicable regulations.
DANGER
Risk of fatal injury due to dangerous lone
working practices!
Work in chambers and narrow rooms as well as work
involving risk of falling are dangerous work. Such
work may not be carried out autonomously! A second
person must be present for safety reasons.
WARNING
Risk of burns from hot surfaces!
Motor housing can become hot during operation. It
may cause burns. Allow the pump to cool down at
ambient temperature after switching it off!
NOTICE
Use only properly functioning lifting equip-
ment!
Use only properly functioning lifting equipment to lift
and lower the pump. Ensure that the pump does not
become jammed during lifting and lowering. Do not
exceed the maximum bearing capacity of the lifting
equipment! Check that lifting equipment is function-
ing properly before use!
8.4.1 Portable wet well installation
‡Pump is taken out of operation.
1. Disconnect the pump from the mains.
2. Roll up the power supply cable and place it over the mo-
tor housing. CAUTION!Never pull on the power supply
cable! This damages the power supply cable!
3. Loosen the pressure pipe from the pressure port.
4. Attach the lifting equipment to the attachment point.
5. Lift the pump from the operating space. CAUTION!The
power supply cable may be squeezed and damaged
when setting the pump down! Pay attention to the
power supply cable when setting the pump down!

en Maintenance and repair
20 WILO SE 2019-02
6. Clean the pump thoroughly (see point “Cleaning and
disinfecting”). DANGER!Disinfect the pump when used
in fluids hazardous to health!
8.4.2 Clean and disinfect
DANGER
Danger due to fluids hazardous to health!
Danger to life if the pump is used in fluids hazardous
to health! Decontaminate the pump before carrying
out any further work! Wear the following protective
equipment while performing cleaning tasks:
• Closed safety goggles
• Breathing mask
• Protective gloves
⇒ The equipment listed here is the minimum re-
quirement, observe the specifications of the
work regulations! The operator must make
sure that the personnel have received and read
the work regulations!
‡Pump is dismantled.
‡Contaminated cleaning water is disposed of in the sewer
in accordance with the locally applicable regulations.
‡A disinfectant is provided for contaminated pumps.
1. Attach the lifting equipment to the attachment point of
the pump.
2. Lift the pump approximately 30cm (10in) above the
ground.
3. Spray the pump with clear water from top to bottom.
NOTICE!An appropriate disinfectant must be used for
contaminated pumps! Strictly observe the manufac-
turer’s specifications concerning use!
4. To clean the impeller and the pump interior, guide the
water jet inside via the pressure port.
5. Flush all dirt residue onto the floor of the channel.
6. Allow the pump to dry out.
In order to completely drain the pump housing, lie it
down on its side for approx. 5minutes. Place the pres-
sure port face down.
8.4.2.1 Cleaning the strainer
The strainer can be removed for cleaning.
1
2
22
Fig.7: Remove the baseplate
1 Strainer
2 Fastening screws, size4 Allen key
1. Place the pump on a firm surface in a horizontal posi-
tion. WARNING!Risk of hands being crushed. Make
sure that the pump does not fall over or slip.
2. Remove the fastening screws at the strainer.
3. Take out the strainer.
4. Rinse the strainer and baseplate of the hydraulics with
clear water and remove solids manually.
5. Put the strainer in place.
6. Screw in the fastening screws. Max. tightening torque:
5.5Nm (4ft·lb)!
▶ Strainer cleaned and fitted, complete the cleaning work.
9 Maintenance and repair
DANGER
Danger due to fluids hazardous to health!
If the pump is used in fluids hazardous to health, de-
contaminate the pump after dismantling and before
carrying out any other work! There is a risk of fatal
injury! Observe the specifications in the work regula-
tions! The operator must make sure that the person-
nel have received and read the work regulations!