Wilo Padus MINI3 5M Series User manual

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Wilo-Padus MINI3
3119684 • Ed.01/2022-06
en Installation and operating instructions

Padus MINI3
https://qr.wilo.com/930

en
Installation and operating instructions • Wilo-Padus MINI3 • Ed.01/2022-06 3
Table of contents
1 Safety...........................................................................................4
1.1 About these instructions ..................................................... 4
1.2 Digital instructions................................................................ 4
1.3 Identification of safety instructions................................... 4
1.4 Personnel qualifications.......................................................4
1.5 Fluids hazardous to health................................................... 5
1.6 Personal protective equipment........................................... 5
1.7 Transport and storage.......................................................... 5
1.8 Installation ............................................................................. 5
1.9 Electrical connection............................................................ 5
1.10 During operation ................................................................... 5
1.11 Removal.................................................................................. 5
1.12 Clean and disinfect ............................................................... 6
1.13 Maintenance tasks................................................................ 6
1.14 Operating fluid ...................................................................... 6
2 Product description and function.............................................6
2.1 Description............................................................................. 6
2.2 Technical data .......................................................................7
2.3 Type key.................................................................................7
2.4 Scope of delivery................................................................... 7
2.5 Functions................................................................................ 7
3 Application/use...........................................................................7
3.1 Intended use..........................................................................7
3.2 Improper use..........................................................................8
4 Transport and storage ...............................................................8
5 Installation and electrical connection......................................8
5.1 Installation types................................................................... 8
5.2 Installation ............................................................................. 8
5.3 Electrical connection............................................................ 9
6 Commissioning .........................................................................10
6.1 Before activating.................................................................10
6.2 Switching on and off ..........................................................10
6.3 Test run ................................................................................11
6.4 During operation .................................................................11
7 Removal.....................................................................................11
7.1 Stationary wet well installation ........................................11
7.2 Portable wet well installation............................................11
8 Cleaning.....................................................................................11
8.1 Clean pump..........................................................................11
8.2 Cleaning the pump interior................................................12
9 Maintenance..............................................................................12
9.1 Operating fluid ....................................................................12
9.2 Oil change ............................................................................13
9.3 General overhaul .................................................................13
10 Faults, causes and remedies....................................................13
11 Spare parts ................................................................................13
12 Disposal .....................................................................................13
12.1 Information on the collection of used electrical and elec-
tronic products....................................................................13
12.2 Oil ...........................................................................................14

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4 Installation and operating instructions • Wilo-Padus MINI3 • Ed.01/2022-06
1 Safety
1.1 About these instructions
These instructions form part of the product.
Compliance with the instructions is essential for
correct handling and use:
•Read the instructions carefully before all
activities.
•Keep the instructions in an accessible place at
all times.
•Pass the instructions on to a subsequent
owner.
•Observe all product specifications.
•Observe the markings on the product.
The language of the original operating instruc-
tions is German. All other languages for these
instructions are translations of the original op-
erating instructions.
Failure to observe the instructions will result in
danger to persons or damage to property. The
manufacturer is not liable for damage caused
by:
•Improper use.
•Incorrect operation.
1.2 Digital instructions
The digital version of the instructions is avail-
able on the following product page:
http://qr.wilo.com/930
1.3 Identification of safety instructions
In these installation and operating instructions,
safety instructions are displayed as follows:
•Danger to persons: Safety instructions are
preceded by a corresponding symbol and are
shaded in grey.
•Damage to property: Safety instructions start
with a signal word and are displayed without
a symbol.
Signal words
•DANGER!
Failure to follow the instructions will result in
serious injuries or death!
•WARNING!
Failure to follow the instructions can lead to
(serious) injury!
•CAUTION!
Failure to follow the instructions can lead to
potentially irreparable property damage.
•NOTICE!
Useful information on handling the product
Symbols
These instructions use the following symbols:
Danger caused by electric
voltages
Danger of explosion
Warning– risk of cuts and similar
injuries
Warning - risk of health damage
Personal protective equipment:
wear protective gloves
Personal protective equipment:
wear face mask
Personal protective equipment:
wear safety goggles
Useful information
1.4 Personnel qualifications
•Persons aged 16 and over
•Have read and understood the installation and
operating instructions
Children and persons with limited abilities in
the household
This device can be used by children from 8years
of age as well as people with reduced physical,
sensory or mental capacities or lack of experi-
ence and knowledge if they are supervised or
instructed on the safe use of the device and
they understand the dangers that can occur.
Children are not allowed to play with the device.
Cleaning and user maintenance must not be
carried out by children without supervision.

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Installation and operating instructions • Wilo-Padus MINI3 • Ed.01/2022-06 5
1.5 Fluids hazardous to health
In stagnant water (e.g. pump sump, soakaway,
etc.) germs which are hazardous to health can
form. There is a danger of bacterial infections!
•Clean and disinfect the product thoroughly
after removal!
•Inform all persons about the pumped fluid and
the danger it poses!
1.6 Personal protective equipment
The aforementioned branded products consti-
tute non-binding suggestions. Similar products
from other brands can also be used. WILO SE
does not assume any liability for the aforemen-
tioned products.
Protective equipment: Transport, installation,
removal and maintenance
•Safety shoes: uvex 1 sport S1
•Protective gloves (EN388): uvex phynomic
wet
Protective equipment: Cleaning work
•Protective gloves (ENISO374-1): uvex pro-
fapren CF33
•Safety goggles (EN166): uvex skyguard NT
•Breathing protection mask (EN149): Half
mask 3M series 6000 with filter 6055 A2
1.7 Transport and storage
•Wear protective equipment!
•Always carry the product by the handle!
•Clean product and disinfect if necessary!
–Dirt fosters the formation of germs.
–Encrustations may lead to the impeller be-
coming blocked.
1.8 Installation
•Wear protective equipment!
•Do not install damaged or defective products.
•If there is a risk of germ formation, observe
the following points:
–Ensure sufficient air exchange.
–Wear a breathing protection mask e.g. Half
mask 3M series 6000 with filter 6055 A2
1.9 Electrical connection
•Do not connect products with a damaged
connection cable! Have the connection cable
replaced by a qualified electrician or the cus-
tomer service.
•Mains connection with correctly installed pro-
tective earth conductor.
•Install the residual-current device (RCD) with
30mA.
•Fuse protection at mains connection: max.
16A.
•Product without plug: Electrical connection
must be carried out by a qualified electrician!
1.10 During operation
•The pumping of highly inflammable and ex-
plosive fluids (petrol, paraffin, etc.) in their
pure form is strictly prohibited!
•If persons come into contact with the
pumped fluid (accessible basins*), do not
commission the product.
*Definition of “accessible basins”
Installation sites that can be walked on and dir-
ectly accessed without tools (examples below):
•Garden ponds
•Swimming ponds
•Cesspools
NOTICE!The specifications applicable to
swimming pools also apply to accessible
basins.
1.11 Removal
•Wear protective equipment!
•Product without plug: Have the connection
cable disconnected from the mains by a qual-
ified electrician.
•Depending on the operating mode and dura-
tion, the housing parts become hotter than
40°C (104°F).
–Only touch the product by the carrying
handle.
–Allow product to cool down.
•Clean the device thoroughly.
•If there is a risk of germ formation, observe
the following points:
–Ensure sufficient air exchange.
–Wear a breathing protection mask e.g. Half
mask 3M series 6000 with filter 6055 A2
–Disinfect product.

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6 Installation and operating instructions • Wilo-Padus MINI3 • Ed.01/2022-06
1.12 Clean and disinfect
•Wear protective equipment!
The protective equipment prevents contact
with germs that are hazardous to health and
the disinfectant.
•If a disinfectant is used, follow the manufac-
turer's instructions!
–Wear protective equipment according to
the manufacturer's instructions! If in doubt,
ask your specialist dealer.
–Inform all persons about the disinfectant
and how to use it correctly!
1.13 Maintenance tasks
•Wear protective equipment!
•Carry out maintenance work in a clean, dry
and well-lit place.
•Only original parts of the manufacturer may
be used. The use of any non-original parts re-
leases the manufacturer from any liability.
•Collect any leakage of fluid and operating
fluid immediately.
1.14 Operating fluid
The oil is located in the sealing chamber. It
serves to lubricate the seal on the motor and
pump side.
•Absorb leakages immediately.
•If major leakages occur, contact customer
service.
•If the seal is defective, the oil enters the
pumped fluid and the sewer.
•Collect waste oil by type (unmixed) and dis-
pose of it in accordance with regulations at a
certified collection point.
•Skin contact: Rinse skin areas thoroughly
with soap and water. If skin irritation occurs,
consult a doctor.
•Contact with eyes: Remove the contact
lenses. Rinse eye thoroughly with water. If
eye irritation occurs, consult a doctor.
•Ingestion: Consult a doctor immediately! Do
not induce vomiting!
2 Product description and function
2.1 Description
Submersible pump for stationary and portable wet well installation
in intermittent operation.
Padus MINI3-V Padus MINI3-M
1
2
3
34
5
5
6 6
Fig.1: Overview
1 Handle
2 Motor housing
3 Discharge connection
4 Pump housing
5 Float switch
6 Connection cable
Padus MINI3-V...-P
Drainage pump with vortex impeller and vertical threaded connec-
tion. Hydraulics housing and impeller made of plastic. Surface-
cooled 1~ motor with integrated operating capacitor and self-
switching thermal motor monitoring. Stainless steel motor hous-
ing. Oil-filled sealing chamber with double sealing: a rotary shaft
seal is installed on the motor side, a mechanical seal on the pump
side. Detachable connection cable with fitted plug (CEE7/7).
Padus MINI3-V...-A
Drainage pump with vortex impeller and vertical threaded connec-
tion. Hydraulics housing and impeller made of plastic. Surface-
cooled 1~ motor with integrated operating capacitor and self-
switching thermal motor monitoring. Stainless steel motor hous-
ing. Oil-filled sealing chamber with double sealing: a rotary shaft
seal is installed on the motor side, a mechanical seal on the pump
side. Detachable connection cable with float switch and fitted plug
(CEE7/7).
Padus MINI3-V...-O
Drainage pump with vortex impeller and vertical threaded connec-
tion. Hydraulics housing and impeller made of plastic. Surface-
cooled 3~ motor with self-switching thermal motor monitoring.
Stainless steel motor housing. Oil-filled sealing chamber with
double sealing: a rotary shaft seal is installed on the motor side, a
mechanical seal on the pump side. Detachable connection cable
with bare cable end, for fixed connection to on-site controls. NO-
TICE!Pump without float switch and plug!
Padus MINI3-M...-P
Drainage pump with semi-open multi-channel impeller and ver-
tical threaded connection. Hydraulics housing and impeller made of
plastic. Surface-cooled 1~ motor with integrated operating capa-

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Installation and operating instructions • Wilo-Padus MINI3 • Ed.01/2022-06 7
citor and self-switching thermal motor monitoring. Stainless steel
motor housing. Oil-filled sealing chamber with double sealing: a
rotary shaft seal is installed on the motor side, a mechanical seal on
the pump side. Detachable connection cable with fitted plug
(CEE7/7).
Padus MINI3-M...-A
Drainage pump with semi-open multi-channel impeller and ver-
tical threaded connection. Hydraulics housing and impeller made of
plastic. Surface-cooled 1~ motor with integrated operating capa-
citor and self-switching thermal motor monitoring. Stainless steel
motor housing. Oil-filled sealing chamber with double sealing: a
rotary shaft seal is installed on the motor side, a mechanical seal on
the pump side. Detachable connection cable with float switch and
fitted plug (CEE7/7).
Padus MINI3-M...-O
Drainage pump with semi-open multi-channel impeller and ver-
tical threaded connection. Hydraulics housing and impeller made of
plastic. Surface-cooled 3~ motor with self-switching thermal mo-
tor monitoring. Stainless steel motor housing. Oil-filled sealing
chamber with double sealing: a rotary shaft seal is installed on the
motor side, a mechanical seal on the pump side. Detachable con-
nection cable with bare cable end, for fixed connection to on-site
controls. NOTICE!Pump without float switch and plug!
2.2 Technical data
Date of manufacture See rating plate1)
Mains connection See rating plate
Rated power See rating plate
Max. delivery head See rating plate
Max. volume flow See rating plate
Activation type See rating plate
Speed See rating plate
Discharge connection* G 1½ IG
Operating mode, immersed S1
Operating mode, non-im-
mersed
S3 20% 2)
Fluid temperature 3...+40°C (37...104°F)
Fluid temperature, short-term
for 3min
-
Max. immersion depth, 5m
(16.5ft) connection cable
2m (6.5ft)
Max. immersion depth, 10m
(33ft) connection cable
7m (23ft)
Protection class IP68
Insulation class F
Max. switching frequency /h 30/h
Key
* IG = female thread, AG = male thread
1) Information according to ISO8601
2) 2 min operation, 8min standby
2.3 Type key
Ex-
ample:
Padus MINI3-M04.10/M05-523/A-10M
Padus Submersible drainage pump
MINI3 Series
MType of impeller
•V = vortex impeller
•M = Multi-channel impeller
04 Nominal diameter discharge connection G1½IG
10 Max. delivery head in m
MMains connection version:
•M = single-phase current (1~)
•T = three-phase current (3~)
05 Value/10 = rated power P2 in kW
5Mains frequency:
•5 = 50Hz
•6 = 60Hz
23 Rated voltage code
AAdditional electrical equipment:
•O = with bare cable end
•P = with plug
•A = with plug and float switch
10M Connection cable length
2.4 Scope of delivery
•Pump
•Swing check valve, pre-assembled
•Hose connection, enclosed
•Installation and operating instructions
2.5 Functions
2.5.1 Self-switching thermal motor monitoring
If the motor becomes too hot, the pump is deactivated. After the
motor has cooled down, the pump is automatically switched on
again.
2.5.2 Float switch
The Padus MINI3-...-A is equipped with a float switch. The float
switch is used to switch the pump on and off depending on the
level:
•Upper floater: Pump on
•Lower floater: Pump off
3 Application/use
3.1 Intended use
For the pumping in domestic areas of:
•Sewage not containing faeces
–Wash basins
–Shower basins/bathtubs
•Wastewater (with small amounts of sand and gravel)
–Rainwater
–Drainage water
•Fluid temperature: 3...+40°C (37...104°F)

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8 Installation and operating instructions • Wilo-Padus MINI3 • Ed.01/2022-06
Use inside and outside buildings
NOTICE
For use inside buildings only
Use pumps with a connection cable less than 10m
(33ft) long only inside buildings. Use outside build-
ings is prohibited!
Pump type
Connection cable length Outdoor application Indoor application
Padus MINI3-...-5M 5m (16.5ft) — •
Padus MINI3-...-10M 10m (33ft) • •
Key:
— = Not permitted, • = Permitted
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 explo-
sion! The pumps are not designed for these fluids.
The submersible pumps must not be used for pumping:
•Untreated sewage
•Sewage containing faeces
•Drinking water
•Fluids containing hard components (such as stones, wood,
metal, etc.)
•Fluids containing high quantities of abrasive contents (e.g.
sand, gravel).
•Viscous fluids (e.g. oil and grease)
•Seawater
Intended use also includes compliance with this manual. Any other
use is regarded as non-compliant with intended use.
4 Transport and storage
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!
•Wear protective equipment!
•Carry the pump by the handle. Never carry or pull on the con-
nection cable!
•Clean the pump and disinfect if necessary.
•Close the discharge connection.
•Protect the connection cable against kinking and damage.
•Use original packaging for transport and storage.
•Pack the pump when dry. Wet or humid pumps may soften the
packaging.
•Storage conditions:
–Maximum: -15...+60°C (5...140°F), max. humidity: 90%,
non-condensing
–Recommended: 5...25°C (41...77°F), relative humidity:
40…50%
5 Installation and electrical connection
5.1 Installation types
•Vertical stationary wet well installation
•Vertical portable wet well installation
5.2 Installation
•Wear protective equipment!
•Do not install a damaged or defective pump.
•Frost-free location.
•Lay the connection cable properly. During operation there must
be no danger (stumbling, damage, etc.).
•Float switch must be able to move freely!
5.2.1 Stationary wet well installation
For stationary wet well installation, the pump is installed directly
onto the pressure pipe. Observe and adhere to the following
points:
•The connected pressure pipe must be self-supporting. The
pressure pipe must not be supported by the pump.
•The pump may oscillate slightly during operation. These oscilla-
tions must be dissipated via the pressure pipe.
•Ensure that the connection to the pressure pipe is stress-free–
do not screw it in too tightly.
•The pressure pipe must not be smaller than the pump’s dis-
charge connection.
•Seal pipe connections with Teflon tape.
•Install all specified valves in accordance with local requirements
(gate valve, non-return valve).
•Lay the discharge pipe frost-proof.
•Air pockets in the pump and in the discharge pipe can lead to
delivery problems.
Installing the ventilation systems:
–For example, air vent valve
–In the discharge pipe
–Before the non-return valve
•Install the discharge pipe as a “pipe loop” to avoid backflow
from the main public sewer.
At its highest point, the bottom edge of the pipe loop must be
above the locally determined backflow level!

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Installation and operating instructions • Wilo-Padus MINI3 • Ed.01/2022-06 9
S1
S3
OFF!
ON
386 mm
15 in
315 mm
12,5 in
75 mm
3 in
245 mm
9,5 in
min. 500x500 mm
min. 20x20 in
min. 500 mm
min. 20 in
Fig.2: Padus MINI3-M: Installation dimensions and switching
points
ON Switch-on level
OFF Switch-off level
Fill level above: Continuous duty (operating mode im-
mersed)
Fill level below: Intermittent periodic duty (operating mode
non-immersed)
S1
S3
OFF!
ON
407 mm
16 in
335 mm
13 in
96 mm
4 in
245 mm
9,5 in
min. 500x500 mm
min. 20x20 in
min. 500 mm
min. 20 in
Fig.3: Padus MINI3-V: Installation dimensions and switching points
ON Switch-on level
OFF Switch-off level
Fill level above: Continuous duty (operating mode im-
mersed)
Fill level below: Intermittent periodic duty (operating mode
non-immersed)
✓Site is prepared.
✓Pressure pipe properly installed.
1. Screw the discharge pipe fully into the pump’s discharge con-
nection.
2. Position the pump at the installation site.
CAUTION!Use a hard surface or underlay at the installation
site to prevent sinking on soft substrate.
3. Connect the discharge pipe to the pressure pipe (e.g. using a
flexible hose section).
4. Secure the connection cable to the pressure pipe and route it
to the socket/power supply.
▶Pump is installed.
5.2.2 Portable wet well installation
The pump can be installed at any location on the application site
when carrying out portable wet well installation. Observe and ad-
here to the following points:
•Secure the pump against falling over and moving (creeping)
during use.
•Secure the pressure hose to the hose connection.
✓Site is prepared
✓Pressure hose to be used: Min. inside diameter 1½"
✓Hose clip to be used: 40−60mm inside diameter (1.6−2.4in)
✓Hose connection to be used: G1½" (with male thread)
1. Attach the hose connection.
Twist the hose connection into the pressure port as far as it
will go.
2. Slide the hose clip over the pressure hose.
3. Slide the pressure hose onto the hose connection at the pres-
sure port.
4. Secure the pressure hose to the hose connection using the
hose clip.
5. Position the pump at the installation site.
CAUTION!Use a hard surface or underlay at the installation
site to prevent sinking on soft substrate.
6. Lay the pressure hose and fasten it in the appropriate place
(e.g. drainage). CAUTION!If the pump is placed in a full
chamber, hold the pump at a slight angle when immersing.
This causes the air to escape from the pump!
7. Route the connection cable to the socket/power supply.
▶Pump is installed.
5.3 Electrical connection
•Mains connection with correctly installed protective earth con-
ductor.
•Residual-current device (RCD) is installed with 30mA.
•Mains connection fuse protection: max. 16A.
•Voltage (U) and frequency (f) data on the rating plate corres-
pond to the data of the mains connection.
Do not connect the pump if:
•The connection cable is damaged
Have the connection cable replaced by a qualified electrician or
the customer service.
•A standalone inverter is in use
Stand-alone inverters are used in autonomous power supplies,
e.g. solar power supply, and can generate overvoltages. Over-
voltages can destroy the pump.
•A multiple plug socket or power strip is in use
•An energy-saving plug is in use
This reduces the energy supply to the pump and the pump may
heat up too much.
•Operation on start-up controls
The pump is not suitable for operation on a frequency converter
or a soft start control.
•Explosive atmospheres
Do not connect and operate the pump inside potentially ex-
plosive atmospheres!
5.3.1 Connection: Pump with plug
Provide for a socket (typeE or typeF) with earthing contact. To
connect the pump, insert the plug into the socket.

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10 Installation and operating instructions • Wilo-Padus MINI3 • Ed.01/2022-06
NOTICE
Pump starts up or is ready for operation!
Once the plug is connected to the socket, the pump
will either start immediately or be ready for opera-
tion:
• Pump without float switch: pump switches on
immediately!
• Pump with float switch: pump is ready for oper-
ation and will switch on depending on the fill
level!
▶We recommend switching the socket on and
off using a separate main switch!
5.3.2 Connection: Pump without a plug
DANGER
Risk of fatal injury due to electrical current!
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!
• Observe local regulations!
CAUTION
Irreparable damage as a result of water pen-
etration
Connection cables without plugs feature bare cable
ends. Water may penetrate the connection cable
and pump via these bare cable ends. This will des-
troy both the connection cable and the pump. Never
immerse the bare end of the connection cable in
fluid. Firmly seal it during storage.
The pump has a connection cable with bare cable end. The pump
must be permanently connected to a switchgear. Observe the fol-
lowing points:
•Earth the device properly!
•Provide a motor protection switch!
The minimum requirement is a thermal relay/motor protection
switch with temperature compensation, differential trip and re-
activation lock according to local regulations.
•Install the mains disconnection device!
Minimum requirement: Main switch with all-pole disconnection.
Pump with single-phase AC motor
To connect the pump firmly to the switchgear, cut off the plug.
Carry out connection to a switchgear as follows:
Wire colour Terminal in switchgear
Brown (bn) L (phase)
Blue (bl) N (neutral conductor)
Green/yellow (gn-ye) Earth (protective earth con-
ductor)
Pump with three-phase AC motor
The pump is suitable for connection to a clockwise rotating field.
Check the rotating field with a rotating-field-testing device before
connection and correct if necessary. CAUTION!The pump is not
approved for operation with a counter-clockwise rotating field!
Carry out connection to a switchgear as follows:
Wire colour Terminal in switchgear
Brown (bn) U
Black (bk) V
Blue (bl) W
Green/yellow (gn-ye) Earth (protective earth con-
ductor)
Adjust the motor protection
Set the motor protection switch to the rated current (see rating
plate).
6 Commissioning
DANGER
Risk of fatal injury due to electrical currents
in accessible basins!
Do not operate the pump if there are persons in
contact with the fluid. In the event of a fault this
may cause death by electric shock! Only activate the
pump when there are no longer any persons in con-
tact with the fluid.
NOTICE
Check the inlet quantity!
The maximum inlet volume flow must be less than
the maximum pump delivery rate. If the inlet quant-
ity is higher, the pump will not be able to pump
away the volume flow. The pump chamber may
overflow!
6.1 Before activating
Check the following prior to activation:
•Has the electrical connection been carried out in accordance
with regulations?
•Has the connection cable been routed safely?
•Can the float switch move freely?
•Temperature of the pumped fluid observed?
•Immersion depth observed?
•Are the pressure pipe and pump sump free of deposits?
•All gate valves in the pressure pipe open?
6.2 Switching on and off
The pump is switched on and off depending on the version:
•Pump with plug, without float switch
The pump will switch on immediately after the plug has been
inserted into the socket. To switch off the pump, pull the plug.
•Pump with plug and float switch
The pump will switch on and off automatically on reaching the
switching level:

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Installation and operating instructions • Wilo-Padus MINI3 • Ed.01/2022-06 11
–Upper floater: Pump on.
–Lower floater: Pump off.
•Pump with bare cable end (without plug)
Switch the pump on and off via a separate control. Read the in-
stallation and operating instructions for the control unit for fur-
ther details.
6.3 Test run
If the pump is installed stationary (e.g. cesspool, overflow shaft),
carry out a test run. Check the following points with the test run:
•General conditions (inflow quantity, switching points)
•Direction of rotation (with 3~ motors)
The test run must include three pump cycles.
1. Flood the pump chamber: Open inlet.
NOTICE!The required feed quantity for the test run can also
be simulated using another water source.
2. When the switch-on level is reached: pump starts.
3. Switch-off level reached: pump stops.
4. Repeat two more pumping processes.
▶Once three pumping processes have been completed
without problems, the test run is finished.
NOTICE!If the pump does not switch on once a week, repeat the
test run every month.
6.4 During operation
CAUTION
Do not allow the pump to dry run!
Do not run the pump without fluid (dry run). Switch
off the pump once the residual water level has been
reached. Dry running may destroy the seal and cause
the pump to be irreparably damaged.
Check the following points:
•Inlet quantity corresponds to the pump delivery rate.
•Float switch is operating correctly.
•Connection cable is not damaged.
•Pump free from deposits and encrustations.
7 Removal
DANGER
Risk of infection due to fluids hazardous to
health!
Hazardous germs can form in standing waters. If
there is a risk of germ formation, observe the fol-
lowing points:
• Ensure sufficient air exchange.
• Wear a breathing protection mask e.g. Half mask
3M series 6000 with filter 6055 A2.
• Disinfect product.
•Wear protective equipment!
•Depending on the operating mode and duration, the housing
parts become hotter than 40°C (104°F).
–Only touch the product by the carrying handle.
–Allow product to cool down.
•Clean the device thoroughly.
7.1 Stationary wet well installation
1. Close the gate valve in the inlet and pressure pipe.
2. Switch off pump.
Pump with a plug: Pull the plug.
Pump firmly connected(without plug): Disconnect the pump
from the mains. DANGER!Have electrical work carried out
by a qualified electrician!
3. Disconnect the connection cable from the pressure pipe.
4. Release the pump and discharge pipe from the pressure pipe.
5. Lift the pump by the handle out of the operating space.
6. Unscrew the discharge pipe from the pressure port.
7. Coil up the connection cable and store it with the pump.
8. Clean pump and discharge pipe thoroughly.
▶Pump removed.
If the pump remains installed, observe the following points:
•Protect pump from frost and ice:
–Immerse the pump completely in the pumped fluid.
–Min. ambient temperature: +3°C (+37°F)
–Min. fluid temperature: +3°C (+37°F)
•If the pump will not be used for a prolonged period, switch on
pump and carry out one pumping process every 2months to
prevent encrustations and clogging. Only carry out the pumping
process under suitable operating conditions!
If the above points are not guaranteed, remove the pump!
7.2 Portable wet well installation
1. Switching off the pump: Disconnect the plug.
2. Lift the pump by the handle out of the operating space.
3. Loosen the hose clip and pull the pressure hose off the dis-
charge port.
4. Coil up the connection cable and store it with the pump.
5. Clean pump and pressure hose thoroughly.
8 Cleaning
•Wear protective equipment!
The protective equipment prevents contact with germs that are
hazardous to health and the disinfectant.
•If a disinfectant is used, follow the manufacturer's instructions!
–Wear protective equipment according to the manufacturer's
instructions! If in doubt, ask your specialist dealer.
–Inform all persons about the disinfectant and how to use it
correctly!
•Drain the water used for cleaning into the sewage system.
8.1 Clean pump
✓Pump removed.
✓Disinfectant is available.
1. Ensure that the plug or bare cable end is packed and stored in
a watertight manner!
2. Rinse the pump and cable under clean, running water.
3. Guide the water jet inwards through the pressure port to clean
the impeller and pump interior.

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12 Installation and operating instructions • Wilo-Padus MINI3 • Ed.01/2022-06
4. Rinse attachments such as the discharge pipe and pressure
hose with clean, running water.
5. Flush dirt residue on the floor into the sewage drain.
6. Allow the pump to dry out.
7. Clean plug or bare cable end with a damp cloth!
▶Pump has been cleaned. Pack and store the pump.
8.2 Cleaning the pump interior
WARNING
Sharp edges on the impeller and suction port!
Sharp edges can form on the impeller and suction
port. There is a danger of cuts and similar injuries!
• Wear protective gloves!
Padus MINI3-M...
In the case of severe dirt and encrustations, remove the strainer on
the suction port and clean the strainer and impeller.
Fig.4: Padus MINI3-M – view from below
1. Place the pump on a firm surface in a horizontal position.
2. Secure the pump against slipping!
3. Remove the four fastening screws at the strainer.
4. Remove the strainer.
5. Rinse the strainer and impeller with clean, running water. Re-
move solids by hand.
6. Replace the strainer if it is damaged (spare part set: 3120222).
7. Insert the strainer.
8. Fully screw in the four fastening screws. Tightening torque:
6...7Nm (4.4...5.2ft·lb)!
NOTICE!Replace worn out screws!
▶Clean strainer and impeller, finish cleaning work.
Padus MINI3-V...
In the case of severe dirt and encrustations, remove the lower part
of the pump housing and clean the pump interior.
Fig.5: Padus MINI3-V: View from below
1. Place the pump on a firm surface in a horizontal position.
2. Secure the pump against slipping!
3. Remove the six fastening screws at the housing.
4. Remove lower part of the pump housing. NOTICE!Do not
damage the flat gasket!
5. Rinse the pump interior and impeller with clean, running wa-
ter. Remove solids by hand.
6. Clean and check the flat gasket. Replace the flat gasket if it is
damaged (cracked, porous, squashed) (spare part set:
3120223).
7. Push the flat gasket on to upper part of pump housing.
8. Attach the lower part of the pump housing.
9. Fully screw in the six fastening screws. Tightening torque:
6...7Nm (4.4...5.2ft·lb)!
NOTICE!Replace worn out screws!
▶Pump interior is cleaned and cleaning work finished.
9 Maintenance
•Wear protective equipment!
•Only perform the maintenance work described in these installa-
tion and operating instructions.
•Carry out maintenance work in a clean, dry and well-lit location.
•Use only original parts obtained from the manufacturer. The use
of any non-original parts releases the manufacturer from any li-
ability.
•Collect any leakage of fluid and operating fluid immediately.
•Dispose of the operating fluid at certified collection points.
9.1 Operating fluid
•Capacity: 210ml (7.1US.fl.oz)
•Interval for oil change: After 720 operating hours or 1x per year
•Oil types (ISOVGclass32):
–ELFOLNADS22
–Shell Turbo T 32

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Installation and operating instructions • Wilo-Padus MINI3 • Ed.01/2022-06 13
9.2 Oil change
Padus MINI3-M Padus MINI3-V
1
Fig.6: Sealing chamber oil change
1 Sealing chamber screw plug
✓Wear protective gloves!
✓Pump is removed, cleaned and if necessary disinfected.
✓Oil-resistant sealable collector tank is accessible.
1. Position the pump horizontally on a firm surface. The screw
plug should face upwards.
2. Secure the pump against falling over or slipping!
3. Unscrew the screw plug slowly.
4. Place a collector tank underneath the pump.
5. Draining the oil: rotate the pump until the opening points
downwards.
6. Checking the oil: notify customer service if the oil contains
metal swarf!
7. Rotate the pump until the opening points upwards again.
8. Filling the oil: pour the oil in through the opening.
⇒Comply with requirements concerning oil type and quant-
ity!
9. Clean the screw plug, replace the seal ring with a new one and
fully screw it in.
9.3 General overhaul
Have the customer service team check the pump after 1,500oper-
ating hours. All components will be checked for wear and damaged
components will be replaced.
10 Faults, causes and remedies
Pump not starting or switches off after a short time
1. Interrupted power supply
⇒Check the electrical connection of the pump.
⇒Have a qualified electrician check fuses/residual-current
devices.
2. Thermal motor monitoring has been tripped
⇒Allow the pump to cool down. The pump will start auto-
matically.
⇒Pump switches on/off too frequently. Check the switching
cycle of the float switch.
⇒Excessive fluid temperature. Check the temperature. If ne-
cessary, use a different pump.
3. Suction port/strainer/impeller silted/clogged
⇒Shut down the pump, remove it and clean it.
4. Float switch not operational
⇒The float switch must be able to move freely.
Pump starts up, but does not supply fluid
1. Pressure pipe/discharge pipe clogged
⇒Flush out the pressure pipe.
⇒Flush out the pressure hose.
⇒Remove any kinks in the pressure hose.
2. Swing check valve contaminated
⇒Shut down the pump, remove it and clean the discharge
connection.
⇒Replace faulty swing check valve.
3. Water level too low
⇒Check inlet.
⇒Pump is pumping at a too low level. Check the switching
cycle of the float switch.
4. Suction port/strainer silted/clogged
⇒Shut down the pump, remove it and clean it.
5. Air in the pump/pressure pipe
⇒Position the pump at a slight angle to allow air to escape.
⇒Install a bleed unit in the pressure pipe.
Delivery rate drops while the pump is running
1. Pressure pipe/discharge pipe clogged
⇒Flush out the pressure pipe.
⇒Flush out the pressure hose.
⇒Remove any kinks in the pressure hose.
2. Suction port/strainer silted/clogged
⇒Shut down the pump, remove it and clean it.
3. Air in the pump/pressure pipe
⇒Position the pump at a slight angle to allow air to escape.
⇒Install a bleed unit in the pressure pipe.
4. Signs of wear
⇒Contact customer service.
Customer service
If the points listed here do not rectify the fault, contact customer
service. Costs may be incurred when using customer service sup-
port! Please contact customer services for more information.
11 Spare parts
Spare parts are ordered via customer service. To avoid return quer-
ies and incorrect orders, the serial or article number must always be
supplied. Subject to change without prior notice!
12 Disposal
12.1 Information on the collection of used electrical and
electronic products
Proper disposal and appropriate recycling of this product prevents
damage to the environment and danger to your personal health.

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14 Installation and operating instructions • Wilo-Padus MINI3 • Ed.01/2022-06
NOTICE
Disposal in domestic waste is prohibited!
In the European Union this symbol may be included
on the product, the packaging or the accompanying
documentation. It means that the electrical and
electronic products in question must not be dis-
posed of along with domestic waste.
To ensure proper handling, recycling and disposal of the used
products in question, please note the following points:
•Hand over these products at designated, certified collection
points only.
•Observe the locally applicable regulations!
Please consult your local municipality, the nearest waste disposal
site, or the dealer who sold the product to you for information on
proper disposal. See www.wilo‑recycling.com for more information
about recycling.
12.2 Oil
WARNING
Risk of environmental and health damage
due to incorrect disposal of oils!
Oil is harmful to health and the environment! Do not
dispose of oil with domestic waste or in the sewage
system! Collect the oil in a sealable, oil-resistant
container and dispose of it at a certified collection
point.

Pioneering for You
Local contact at
www.wilo.com/contact
WILO SE
Wilopark 1
44263 Dortmund
Germany
T [phone]
T [phone]
[email protected]
www.wilo.com