Wilo Actun Opti MSI4.04-12 User manual

6084879·Ed.03/2021-01 DIN A5
Wilo-Actun OPTI-MS...
Pioneering for You
en Installation and operating instructions

Fig. 1
MSI MSH
1
2
3
4
5
6
6
5
17
8

Fig. 2
1
3
2
5
4
1
3
2
7
6
5
4
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2
7
8
6
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4
1

Fig. 3fFig. 3e
Fig. 3bFig. 3a
Fig. 3dFig. 3c
1
2
3
4
1
2
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Fig. 3hFig. 3g
Fig. 3jFig. 3i
Fig. 4bFig. 4a
Fig. 4c
1
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7

Fig. 6
/6/GPPLQP7
8
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Fig. 7
2,5 m
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2

Installation and operating instructions Wilo-Actun OPTI-MS... 9
English
1. Introduction 10
1.1. About this manual 10
1.2. Copyright 10
1.3. Subject to changes 10
1.4. Warranty 10
2. Safety 11
2.1. Identication of safety instructions 11
2.2. Personnel qualications 13
2.3. Electrical work 13
2.4. Monitoring devices 14
2.5. During operation 14
2.6. Fluids 15
2.7. Operator’s obligations 15
3. Application/Use 16
3.1. Intended use 16
3.2. Improper use 17
4. Product description 17
4.1. Design 17
4.2. How it works 19
4.3. Monitoring devices 19
4.4. Operating modes 20
4.5. Technical data 20
4.6. Scope of delivery 21
4.7. Accessories (optionally available) 21
5. Transport and storage 21
5.1. Delivery 21
5.2. Transport 22
5.3. Storage 23
5.4. Return delivery 24
6. Installation 24
6.1. General 24
6.2. Installation types 25
6.3. Electrical connection 27
6.4. Motor protection 30
6.5. Installation 30
6.6. Dry-running protection 35
7. Commissioning 36
7.1. Electrical system 37
7.2. Initial commissioning 37
7.3. Operation 38
7.4. Conduct during operation 39
8. Decommissioning/Disposal 39
8.1. Temporary shutdown 40
8.2. Shutdown for maintenance work
or storage 40
8.3. Recommissioning 41
8.4. Disposal 41
9. Maintenance and repair 42
10. Troubleshooting 42
10.1. Faults 42
11. Appendix 44
11.1. Spare parts 44

10 WILO SE 2021-01 DIN A5
English INTRODUCTION
1. Introduction
1.1. About this manual
The installation and operating instructions are an integral part of the product. Read
these instructions before all activities and keep them accessible at all times. Strict ob-
servance of these instructions is a prerequisite for the intended use and correct handling
of the product. Observe all information and markings on the product.
The original operating instructions were written in German. All other languages of these
instructions are translations of the original operating instructions.
1.2. Copyright
This operating and maintenance manual has been copyrighted by the manufacturer.
Under no circumstances may any of the content be reproduced, distributed or used for
any competitive purpose without authorization and handed to third parties.
1.3. Subject to changes
The manufacturer reserves the right to make technical modications to the product or
individual components. Illustrations used may differ from the original and serve only as
example illustrations of the product.
1.4. Warranty
For the warranty and warranty period the information in the current “General Terms and
Conditions” applies (see: www.wilo.com/legal).
Any deviations must be contractually agreed and shall then be given priority.
Warranty claims
Provided that the following points have been adhered to, the manufacturer is obliged to
repair any qualitative or constructive defects:
• The defects were reported in writing to the manufacturer within the warranty period.
• Application according to intended use.
• All monitoring devices are connected and were checked before commissioning.
Disclaimer
A disclaimer rules out any liability for personal injury, material damage or nancial
losses. This exclusion of liability follows as soon as one of the following points applies:
• Inadequate conguration due to unsatisfactory or false information provided by the
operator or employer
• Non-observance of the Installation and Operating Instructions
• Improper use
• Improper storage or transport
• Faulty installation or dismantling
• Insufcient or incorrect maintenance
• Unauthorized repairs

Installation and operating instructions Wilo-Actun OPTI-MS... 11
SAFETY English
• Inadequate installation site
• Chemical, electrical or electrochemical inuences
• Wear
2. Safety
This section contains basic indications which must be observed during the individu-
al phases of life. Failure to observe these installation and operating instructions may
endanger people, the environment as well as the product and lead to the loss of any
damages claims. A failure to observe may bring about the following dangers:
• Danger to persons due to electrical, mechanical and bacteriological effects as well as
electromagnetic elds
• Danger to the environment due to leakage of hazardous substances
• Material damage
• Failure of important functions of the product
In addition, observe the instructions and safety instructions in the following
sections!
2.1. Identication of safety instructions
In these installation and operating instructions, safety instructions are used for material
damage and personal injury. These safety instructions are illustrated differently:
• Safety instructions for personal injury start with a signal word, have a corresponding
prexed symbol and are grayed out.
DANGER
Type and source of danger!
Impacts of the danger and instructions for prevention.
• Safety instructions for material damage start with a signal word and are represented
without a symbol.
CAUTION
Type and source of danger!
Impacts or information

12 WILO SE 2021-01 DIN A5
English SAFETY
Signal words
• DANGER!
Non-compliance causes death or serious injury!
• WARNING!
Non-compliance can cause (serious) injury!
• CAUTION!
Non-compliance can cause material damage or even total loss.
• NOTICE!
Useful information about handling the product
Symbols
The following symbols are used in these instructions:
Danger symbol: General hazard
Danger symbol, for example, electrical current
Danger symbol: Risk of cuts
Danger symbol: Risk caused by electromagnetic waves
Danger symbol: Risk of explosion
Danger symbol: Suspended loads
Danger symbol: Risk of falling

Installation and operating instructions Wilo-Actun OPTI-MS... 13
SAFETY English
Danger symbol: Hot surfaces
Danger symbol: Risk of crushing
Useful information
2.2. Personnel qualications
Personnel must:
• Be informed of the locally applicable accident prevention regulations.
• Have read and understood the installation and operating instructions.
The personnel must have the following qualications:
• Electrical work: A qualied electrician must carry out the electrical work.
• Installation/dismantling work: The technician must be trained to handle the necessary
tools and required xation materials for the available installation site.
• Maintenance work: The technician must be familiar with the use of operating uids and
their disposal. Furthermore, the technician must have basic knowledge of engineering.
Denition “Qualied Electrician”
A qualied electrician is someone with suitable technical training, knowledge and expe-
rience who can identify and avoid the dangers associated with electricity.
2.3. Electrical work
• A qualied electrician must carry out the electrical work.
• When connecting to the power supply, adhere to the local regulations as well as the
provisions of the local energy supply company.
• Before all work, disconnect the product from the power supply and take measures to
prevent unauthorized switch-on.
• The personnel is instructed in how to implement the electrical connection as well as in
the shutdown methods of the product.
• Adhere to the technical information in these installation and operating instructions as
well as on the rating plate.
• Ground the product.
• Observe the manufacturer’s regulations when connecting to electrical switchgears.
• Immediately replace faulty connection cables. Contact customer service.

14 WILO SE 2021-01 DIN A5
English SAFETY
2.4. Monitoring devices
The following monitoring devices must be provided by the customer if the pump is
connected to a power supply grid:
Circuit breaker
• Install the circuit breaker in accordance with the manufacturer instructions. Observe
local regulations.
• Further protection devices (e.g. overvoltage, undervoltage, or phase-failure relay, etc.)
must be provided on-site for sensitive power supplies.
Residual-current device (RCD)
• Adhere to the regulations of the local energy supply company! We recommend using a
residual-current device.
• If persons could come into contact with the product and conductive liquids, secure
connection with a residual-current device (RCD).
2.5. During operation
When operating the pump, always follow the locally applicable laws and regulations for
work safety, accident prevention, and handling electrical machinery.
The operator must specify a personnel work plan for a safe workow. All personnel is
responsible for ensuring that regulations are observed.
The pump is equipped with moving parts. During operation, these parts rotate in order
to pump the uid. Certain substances in the uid can result in very sharp edges forming
on the moving parts.
WARNING: rotating parts!
The rotating parts can crush and sever limbs. Do
not reach into the hydraulics or touch the rotating
parts when the machine is in operation. Switch off
the pump and allow the rotating parts to come to a
standstill prior to maintenance and repair work!

Installation and operating instructions Wilo-Actun OPTI-MS... 15
SAFETY English
2.6. Fluids
Each uid differs in respect of composition, corrosiveness, abrasiveness, dry matter
content, and in many other aspects. Generally, our pumps can be used for many appli-
cations. Please note that if requirements change (density, viscosity or general composi-
tion), this can also affect many operating parameters of the pump.
If the pump is used in or switched over to a different uid, observe the following:
• For use in drinking water applications, make sure that all parts that come into contact
with the medium are suitable for such use. This must be checked in accordance with the
local regulations and laws.
The pumps must not be used in wastewater and sewage and/or with uids that are
hazardous to health.
2.7. Operator’s obligations
• Provide the installation and operating instructions in a language that personnel can
understand.
• Ensure the required level of training of personnel for the specied work.
• Provide the required protective equipment and ensure that the personnel wear the
protective equipment.
• Ensure that the attached safety and information signs on the product are always legible.
• Instruct personnel in how the system operates.
• Eliminate any potential risks posed by electricity.
• Fit dangerous components within the system with an on-site guard.
• Secure and mark the work area.
• Dene a personnel work plan for safe workow.
Children and persons under 16 years of age or with limited physical, sensory or cognitive
capacities are prohibited from handling the product! Persons under 18 years of age must
be supervised by a technician!

16 WILO SE 2021-01 DIN A5
English APPLICATION/USE
3. Application/Use
DANGER: electrical hazard
When using the pump in swimming pools or
other basins that can be entered, there is a risk of
electrocution.
NOTE:
• Use is strictly forbidden if there are people in the
pool or basin!
• If there are no people in the basin, protec-
tive measures must be taken according to
DINEN62638 (or the appropriate national
regulations).
RISK of fatal injury from magnetic eld!
The permanently magnetized rotor inside the motor
presents an acute danger to persons with pace-
makers. Non-observance may result in death or the
most serious of injuries.
• Do not open the motor!
• Only allow Wilo customer service to dismantle
and install the rotor for maintenance and repair
work.
• Persons with pacemakers must observe the gen-
eral behavioral guidelines applicable to handling
electrical devices when working on the pump!
NOTICE:
The magnets inside the motor do not pose a danger
provided the motor is completely mounted. As such,
the pump assembly does not pose a special danger to
persons with pacemakers, who can safely approach a
pump without any restrictions.
3.1. Intended use
Submersible pumps are suitable for:
• Water supply from boreholes, wells and rainwater storage tanks.
• Domestic and commercial water supply, sprinkling and irrigation.
• Pumping water without long-ber and abrasive constituents.

Installation and operating instructions Wilo-Actun OPTI-MS... 17
PRODUCT DESCRIPTION English
Pumping drinking water
When used to pump drinking water, the local guidelines/laws/regulations must be
checked to establish whether the pump is suitable for this application.
Pumps do not meet the specications of the German drinking water regulations
(TrinkwV) and they have not been approved as per ACS or local guidelines, such as KTW
and elastomer guideline.
3.2. Improper use
DANGER – explosive uids!
It is strictly prohibited to pump explosive uids
(gasoline, kerosene etc.). The pumps are not de-
signed for these uids!
NOTICE:
Submersible pumps must not be connected to the
public power supply network!
They are designed to be supplied exclusively from
• Photovoltaic systems
• Independent AC power sources or networks sup-
plied by these sources
Submersible pumps must not be used for pumping:
• Wastewater
• Sewage/faeces
• Untreated sewage
Intended use also includes observance of these instructions. Any use other than the
intended use is regarded as improper use.
4. Product description
4.1. Design
Fully submersible, multistage submersible pump with integrated non-return valve to
supply wastewater and drinking water, available as centrifugal pump in anged bowl
construction (MSI) or progressive cavity pump (MSH).
The unit can be installed vertically or horizontally. The motor is cooled by the pumped
uid. Therefore, the unit must always be operated immersed. The limit values for maxi-
mum uid temperature, minimum ow rate and voltage ranges must be adhered to.
Vertical installation is possible with or without cooling shroud depending on the cong-
uration. In cases of horizontal installation, a cooling shroud must always be provided.

18 WILO SE 2021-01 DIN A5
English PRODUCT DESCRIPTION
Fig. 1: Description of the submersible pump
1 Internal frequency converter 5 Non-return valve
2 Permanent magnet motor 6 Pressure connection
3 Suction piece 7 Stator tube with eccentric screw
(MSH)
4 Multistage hydraulics (MSI) 8 Support pipe (MSH)
4.1.1. Hydraulics
The pump is not self-priming, i.e. the uid must ow in either automatically or with
supply pressure and the minimum submersion (2.5m) must be ensured at all times.
Actun OPTI-MSI
Multistage hydraulics with radial impellers in sectional construction. The hydraulics
housing, the pump shaft and the impellers are made of stainless steel. The connection
on the pressure side is designed as a vertical threaded ange with a female thread and
integrated non-return valve.
Actun OPTI-MSH
Progressive cavity pump featuring eccentric screw within a double-helix rubber stator.
The hydraulics housing, the pump shaft and the eccentric screw are made of stainless
steel. The connection on the pressure side is designed as a vertical threaded ange with
a female thread and integrated non-return valve.
4.1.2. Motor
The drive unit is a stainless, encapsulated permanent magnet motor featuring inte-
grated frequency converter. The permanent magnet motor has been cast hermetically
featuring coiling insulated by paint, it has been resin-impregnated and features self-
lubricating bearings.
The motor is cooled by the pumped uid. Therefore, the motor must always be operated
immersed. The limit values for maximum uid temperature and minimum ow velocity
must be adhered to.
The integrated frequency converter enables operation with AC or DC power sources.
Consequently, the Actun OPTI-MS pump is particularly suitable for operation with
solar power. In applications with solar modules the integrated MPPT (Maximum Power
Point Tracking) algorithm enables an adaption to the available power to maximize the
pumped ow rate (dynamic MPPT).
The connection cable has bare cable ends, is longitudinally watertight and is connected
to the motor by a detachable plug.

Installation and operating instructions Wilo-Actun OPTI-MS... 19
PRODUCT DESCRIPTION English
4.1.3. Motor lling
The motor has been lled ex works with a water-glycol mixture. This lling guarantees
that the pump is frost-proof at temperatures down to -20°C.
The motor is designed in such a way that it cannot be lled from outside. The manufac-
turer alone can ll the motor.
4.1.4. Seal
A mechanical seal has been installed between motor and hydraulics.
4.2. How it works
The pump can be switched on and off using a separate switch (main switch or DC
switch) that must be provided by the customer. The separate switch means the power
supply can be cut if required. The pump need not be switched on or off manually. When
the pump is switched on, it operates autonomously and is controlled as well as moni-
tored by the integrated electronics.
Connect accessories, such as the Wilo-MS Control switchgear and additional accesso-
ries (sensors), to implement pressure-dependent pump control.
Behavior during mains operation
After having switched on the power supply, the integrated frequency converter starts
up the pump to its maximum speed and the pump supplies at full power.
Behavior under solar power supply
After having switched on the power supply and as soon as the minimum voltage re-
quired to operate the motor has been generated, the frequency converter starts up the
pump. Depending on the available power provided by the solar panels, the frequency
converter generates the maximum available speed.
If the voltage drops below the required minimum value, the frequency converter switch-
es off the pump.
4.3. Monitoring devices
The pumps are equipped with the following monitoring devices:
• Undervoltage
• Overvoltage
• Excess current
• Temperature
• Dry-running protection with pre-wired water level sensor
These functions are implemented by the integrated electronics system and do not have
to be connected separately.

20 WILO SE 2021-01 DIN A5
English PRODUCT DESCRIPTION
4.4. Operating modes
Operating mode S1 (continuous duty)
The pump can operate continuously at the rated load without exceeding the permissible
temperature.
4.5. Technical data
Wilo-Actun OPTI-MS...
Voltage range: See rating plate
Frequency [f DC]: 50/60Hz
Rated power [P2]: See rating plate
Rated speed [n]: See rating plate
Max. delivery head [H]: See rating plate
Max. volume ow [Q]: See rating plate
Activation types [AT]: Direct
Protection class: IP68
Insulation class [Cl.]: F
Operating mode (immersed) [OTS]: S1
Operating mode (non-immersed) [OTE]: -
Maximum current consumption [Imax]: See rating plate
Rated motor current [IN]: See rating plate
Max. switching frequency: 30/h
Max. immersion depth: 150 m
Fluid temperature [t]: 3…35°C
Max. sand content: 50g/m³
Min. ow at motor: 0.2m/s
OPTI pressure connection
MSH4.01-03:
MSH4.02-02:
MSI4.01-18 ... MSI4.04-33:
MSI4.05-04, MSI4.05-08:
MSI4.06-06 ... MSI4.06-21:
MSI4.08-03, MSI4.08-05
MSI4.011-05 ... MSI4.017-06:
Rp 1¼
Rp 1¼
Rp 1¼
Rp 1½
Rp 1½
Rp 1½ (Rp2, with enclosed adapter)
Rp 2