Argo-Hytos FA 016 Maintenance and service guide

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Safety and operating instructions
Read safety and operating instructions before use.
Note: The indicated data only serve to describe the product.
Specifications regarding the use of this product are only examples and suggestions.
Catalog specifications are no guaranteed features.
The information given does not release the user from his / her own assessments and inspection.
Our products are subject to a process of natural wear and aging.
© All rights are reserved by ARGO-HYTOS GMBH, even in the event of industrial property rights.
Any right of disposal such as copying and distribution rights shall remain with us.
The picture on the title page shows a configuration example.
The delivered product may thus differ from the illustration.
Filter Unit
FA 016
Manual

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Contents
Filter Unit FA 016
Contents........................................................................................................................................................................ 2
1. About this documentation........................................................................................................................................... 4
1.1 Applicability of this documentation.................................................................................................................................. 4
1.2 Required and supplementary documentation................................................................................................................... 4
1.3 Presentation of information............................................................................................................................................. 4
1.3.1 Safety instructions ........................................................................................................................................................... 4
1.3.2 Symbols........................................................................................................................................................................... 5
1.3.3 Terms .............................................................................................................................................................................. 5
1.3.4 Abbreviations .................................................................................................................................................................. 5
2. Safety instructions........................................................................................................................................................ 6
2.1 About this chapter........................................................................................................................................................... 6
2.2 Intended use ................................................................................................................................................................... 6
2.3 Improper use .................................................................................................................................................................. 6
2.4 Reasonably foreseeable misuse........................................................................................................................................ 6
2.5 Qualification of personnel................................................................................................................................................ 6
2.6 General safety instructions............................................................................................................................................... 7
2.7 Product and technology related safety instructions .......................................................................................................... 7
3. General instructions ..................................................................................................................................................... 8
4. Scope of delivery.......................................................................................................................................................... 9
5. About this product ..................................................................................................................................................... 10
5.1 Performance specification.............................................................................................................................................. 10
5.2 Device description ......................................................................................................................................................... 10
5.3 Component overview .................................................................................................................................................... 10
5.4 Identification of the product .......................................................................................................................................... 11
6. Transport and storage................................................................................................................................................ 12
6.1 Transport....................................................................................................................................................................... 12
6.2 Storage ......................................................................................................................................................................... 12
7. Assembly..................................................................................................................................................................... 13
8. Commissioning ........................................................................................................................................................... 14
8.1 Before commissioning ................................................................................................................................................... 14
8.2 After switching on......................................................................................................................................................... 14
8.3 In case of power failure ................................................................................................................................................. 14
9. Operation.................................................................................................................................................................... 15
9.1 Filtering hydraulic fluids when refilling........................................................................................................................... 15
9.2 Filtering liquids in the bypass flow ................................................................................................................................. 16
10. Maintenance / repair.................................................................................................................................................. 17
10.1 Maintenance ................................................................................................................................................................. 18
10.2 Maintenance overview................................................................................................................................................... 18
10.2.1 Replacing the suction strainer........................................................................................................................................ 18
10.3. Replacing the filter element........................................................................................................................................... 19
10.3.1 Removing the filter element........................................................................................................................................... 19
10.3.2 Removing the filter element from the cover................................................................................................................... 19
10.3.3 Attaching the filter element........................................................................................................................................... 19
10.3.4 Installing the filter element ............................................................................................................................................ 19
10.4 Replacing the pump ...................................................................................................................................................... 20

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10.4.1 Removing the pump...................................................................................................................................................... 21
10.4.2 Installing the pump........................................................................................................................................................ 21
10.5 Replacing the motor...................................................................................................................................................... 21
10.5.1 Removing the motor...................................................................................................................................................... 22
10.5.2 Installing the motor ....................................................................................................................................................... 22
11. Decommissioning ....................................................................................................................................................... 23
12. Disassembly ................................................................................................................................................................ 24
13. Disposal....................................................................................................................................................................... 25
14. Extension..................................................................................................................................................................... 26
14.1 Optional accessories ...................................................................................................................................................... 26
14.1.1 Mobile transport aid / trolley.......................................................................................................................................... 26
14.1.2 Hose extensions............................................................................................................................................................. 26
15. Troubleshooting.......................................................................................................................................................... 27
15.1 How to proceed ............................................................................................................................................................ 27
15.2 Fault table ..................................................................................................................................................................... 28
16. Technical data ............................................................................................................................................................. 29
16.1 Device dimensions......................................................................................................................................................... 29
16.2 Technical data................................................................................................................................................................ 30
16.3 Operating conditions..................................................................................................................................................... 31
16.4 Hydraulic circuit diagrams.............................................................................................................................................. 31
17. Appendix..................................................................................................................................................................... 32
17.1. Declaration of Conformity ............................................................................................................................................. 32
17.2 Spare parts list............................................................................................................................................................... 33

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1. About this documentation
1.1 Applicability of this documentation
This documentation is applicable for the following product:
›Filter Unit FA 016
This documentation is written for technicians, operators, service engineers and system operators.
This document contains important information for safe and appropriate assembly, transport, activation, operation, usage, servicing,
dismantling and simple troubleshooting.
›Read this document completely and in particular Chapter 2, “Safety Instructions”, before you work with the product.
1.2 Required and supplementary documentation
Do not commission the product until you have received the documentation marked with the book icon and before you have under-
stood and complied with the information therein.
Title Number of document 1.2.1 Document type
Data sheet 80.65 PDF
Table 1: Required and supplementary documentation
1.3 Presentation of information
So that this document can help you to work quickly and safely with your product, we use standardized safety instructions, symbols,
terms and abbreviations. For better understanding, these are explained in the following sections.
1.3.1 Safety instructions
In this documentation, safety instructions are faced with a sequence of actions which would result in the danger of personal injury or
damage to equipment. The measures described to avoid theses hazards must be observed.
DANGER
Type and source of danger
›Consequences of the danger
›Escaping or averting the danger
›Rescue (optional)
›Warning signal: draws attention to the danger
›Signal word: indicates the severity of the danger
›Type and source of danger: specifies the type and source of danger
›Consequences: describes the consequences in the event of non-compliance
›Action: indicates how the danger can be avoided
Table 2: Meaning of the warning signs
Warning sign, signal word Meaning
DANGER Indicates a dangerous situation which results in death or serious injury if not avoided.
WARNING Indicates a dangerous situation which may result in death or serious bodily injury if not avoided.
CAUTION Indicates a dangerous situation which may result in light to moderate injury if not avoided.
NOTE Indicates property damage: The product or surrounding could be damaged.

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1.3.2 Symbols
The following symbols indicate notes which are not safety-relevant but increase the intelligibility of the documentation.
Table 3: Meaning of symbols
Symbol Meaning
If this information is not observed, the product cannot optimally be used or operated
>Singular, independent action step / instruction
1.
2.
3.
This symbol indicates danger to equipment, material and environment
This symbol indicates the risk of personal injury (minor injury).
This symbol indicates the risk of personal injury (death, serious bodily injury).
This symbol specifies that protective gloves should be worn.
This symbol specifies that safety shoes should be worn.
This symbol specifies that protective goggles should be worn.
This symbol specifies that the unit should be disconnected from the power supply.
1.3.3 Terms
In this documentation the following terms are used:
Table 4: Terms
1.3.4 Abbreviations
In this documentation the following abbreviations are used:
Table 5: Abbreviations
Term Meaning
Term Meaning
FA Filter Unit
Numbered instruction
The numbers indicate that the action steps follow one another

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2. Safety instructions
2.1 About this chapter
This product was manufactured according to the generally recognized standards of engineering. Nevertheless, there is a danger of
injury or damage if you do not observe this chapter and the safety instructions in this documentation.
› Read this document thoroughly and completely before working with the product.
› Retain this document and ensure that it is available for all users at all times.
› Always include the necessary documentation when passing the equipment along to a third party.
2.2 Intended use
This product is a hydraulic component.
You may use the product for the following:
› for filtration of lubricating and hydraulic oils during filling of machines and systems, taking the technical data into account;
› for filtration of hydraulic fluids in the bypass flow on machines and systems, taking the technical data into account.
This product is intended for professional use only, and not for private use.
"Intended use" also includes that you have completely read and understood this documentation, in particular Chapter 2
"Safety Instructions".
2.3 Improper use
Any other use than the intended use described, is improper and inadmissible.
If unsuitable products are installed or used in safety-related applications, unintended operating states may occur in the application,
which may cause personal injury and / or property damage.
Therefore only use this product in safety-related applications if this use is explicitly specified and permitted in the product documen-
tation, e.g. in explosion protection areas or in safety-related parts of a control system (functional safety).
ARGO-HYTOS GMBH assumes no liability for damages resulting from improper use. The risks associated with improper use are solely
with the user.
2.4 Reasonably foreseeable misuse
The delivery of the following media is forbidden:
›flammable liquids such as petrol or thinner (explosion hazard)
›foodstuffs
The device is not suitable for sucking sludge and sediment.
The operator alone is liable for damages resulting from improper use.
2.5 Qualification of personnel
The operations described in this document require fundamental knowledge of mechanics and hydraulics as well as knowledge of the
appropriate technical terms. In order to ensure safe use, these operations may therefore only be carried out by a correspondingly
skilled worker or an instructed person under the guidance of a skilled worker.
A skilled worker is someone who can - based on his / her technical education, knowledge and experience as well as knowledge of
the respective regulations of the jobs assigned to him / her - recognize possible dangers and ensure appropriate safety measures.
A skilled worker must observe the relevant technical regulations.

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2.6 General safety instructions
›Observe the valid regulations for accident prevention and environmental protection.
›Observe the safety regulations and requirements of the country in which the product is used / applied.
›Only use ARGO-HYTOS products that are in technically perfect condition.
›Observe all instructions on the product.
›People who assemble, operate, disassemble or maintain ARGO-HYTOS products may not do so under the influence of alcohol,
other drugs or medications that affect the responsiveness.
›Only use manufacturer-approved accessories and spare parts, in order to prevent personal danger due to unsuitable
spare parts.
›Observe the technical data and ambient specifications specified in the product documentation.
›If unsuitable products are used or installed in safety-relevant applications, unintended operating states may occur in the application,
which can cause personal injury and / or material damage. Therefore only use the product in safety-relevant applications if this use
is explicitly specified and permitted in the product documentation.
›You may only put the product into operation, when it has been established that the final product (e.g. a machine or system), into
which the ARGO-HYTOS products have been installed, complies with the country-specific regulations, safety regulations and
tandards of the application.
2.7 Product and technology related safety instructions
CAUTION
Leaked hydraulic oil
Environmental hazard / risk of slipping.
›In case of spills, cover the oil-covered surface immediately with an oil-binding medium.
›Then immediately dispose of the oil-binding medium according to the national environmental regulations.
Ignition hazard
Risk of electrostatic charge by poorly conducting hydraulic fluid.
›If the electrical conductivity of the hydraulic fluid is not known, please contact the manufacturer of the
hydraulic fluid.
Risk of burns
Contact temperatures according to DIN EN563 (3) and DIN EN13202 (4) may be exceeded during
operation.
›Allow the filter unit to cool down before touching it.

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For prevention of material damage and product damage
CAUTION
Danger due to improper handling
Property damage
›The filter unit may only be used in accordance with Section 2.2, “Intended use”.
Leakage or spillage of hydraulic fluid
Environmental pollution and ground water contamination.
›Use oil binding agents in order to bind leaked hydraulic oil.
Risk of burns
Contact temperatures according to DIN EN563 (3) and DIN EN13202 (4) may be exceed during
operation.
›Allow the filter unit to cool down before touching it.
Contamination due to fluids and foreign bodies
Premature wear - malfunction - risk of damage - property damage.
›Ensure cleanliness during installation in order to prevent foreign bodies, such as welding beads or metal chips,
from entering the hydraulic lines, leading to premature wear or malfunction.
›Make sure that connections, hydraulic lines and attachment parts (e.g. gauges) are free of dirt and chips.
›Prior to commissioning, check that all hydraulic and mechanical connections are connected and tight,
and that all gaskets and seals of the plug connectors are correctly assembled and undamaged.
›For removal of lubricants and other contaminants, use residue-free industrial wipes.
›Make sure that all connections, hydraulic lines and attachment parts are clean.
›Ensure that no contaminants enter when closing the connections.
›Make sure that no detergents enter the hydraulic system.
›Do not use cotton waste or faying cleaning rags for cleaning.
›Do not use hemp as sealing agent.
Improper cleaning
Premature wear, malfunctions. Risk of damage! Property damage.
›Close all openings with appropriate protective fittings to prevent penetration of detergents.
›Do not use aggressive cleaning agents for cleaning. Clean the product with a suitable cleaning fluid.
›Do not use a high pressure cleaner.
›Do not use compressed air to clean function interfaces such as seal areas.
3. General instructions

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4. Scope of delivery
The package includes:
›1 Filter Unit FA 016
›1 Operating manual

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5. About this product
5.1 Performance specification
The filter unit FA 016 is a mobile filter unit for filtration of hydraulic fluids and lubricants with a viscosity of 15 mm2/s - 200 mm2/s
(in continuous operation) in the bypass flow (400 mm2/s max. in short-term operation).
A separate installation in the bypass or cooling circuit for fine filtration and discharge of the full flow filter is just as possible as the
filtration of fresh oil and the cleaning (flushing) of polluted systems for wear protection of components and systems.
The volume flow is 16 l/min (50 Hz).
The operating temperature is in the range of 0° C to 65 °C.
1 Clogging indicator 7 Suction bell
2 Pressure hose 8 Electric motor
3 Discharge pipe 9 Power supply cable
4 On / off switch 10 Suction hose
5 Oil sump 11 Filter housing with filter element
6 Carrying frame 12 Filter cover
Fig.1: Component overview
1
2
3
4
10
9
8
7
6
5
11
12
5.2 Device description
The filter unit FA 016 consists of a support frame in which a filter pump unit is integrated. This
consists of an electrically operated filter pump with exchangeable filter element and a gauge as
maintenance indicator.
The on/off switch is located in the control box of the pump motor. The suction hose is connected to
the suction port of the pump and the pressure hose at the outlet of the main filter.
5.3 Component overview

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5.4 Identification of the product
1 Max. pressure 4 Year of manufacture
2 Nominal volume flow 5 Type designation
3 Filter fineness 6 Address
Fig. 2: Nameplate
NOTE
Nameplates are documents which must not be changed or removed.
›Damaged or lost nameplates have to be replaced true to the original.

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CAUTION
Risks related to chemical reactions
Risk of injury
›Chemical substances in the immediate vicinity of the filter unit may react and lead to destruction of the
device and to injuries of persons who are in the immediate vicinity of the device.
›Storage in the immediate vicinity of chemically active substances such as acids, alkalis, salts, organic solvents
and rechargeable batteries is prohibited.
6. Transport and storage
6.1 Transport
CAUTION
Falling unit through incorrect transport
Injury and property damage
›The unit must be carried manually by two persons due to its own weight of 22 kg.
›Wear safety shoes when transporting the filter unit.
The filter unit FA 016 should be stored in an enclosed area to protect it from humidity and condensation.
6.2 Storage
The ambient temperature during storage of the filter unit FA 016 should be between + 5 °C and + 30 °C at a humidity of 80 %.
Before storage over a period of more than 6 months, the unit should be filled with oil in order to preserve it against corrosion.
Transport
The compact design allows for easy transport of the filter unit FA 016 - even in inaccessible areas of hydraulic systems.
Hoses and electrical cables can be attached to the device. The device can be transported or operated both standing and lying.
Observe the notes in Chapter 2 "General safety instructions".
›When using mobile transport aids, ensure a secure position of the unit (danger of tipping).
›During transport, fix the suction and pressure hose in the provided supports in order to avoid a possible leakage of residual oil.

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7. Assembly
WARNING
Faulty power supply
Risk of death and injury
›Always consider the country-specific regulations.
Let - prior to commissioning - an electrician check whether:
›the mains voltage matches with the voltage specified on the typeplate of the motor,
›the power source has appropriately been secured,
›the cross-section is of sufficient size,
›cable and connection to the power source are in perfect condition.
With 3-phase AC motors check after connecting that:
›when switching on, the direction of rotation matches with the direction arrow on the motor, if not, have it changed by an
electrician.
Specifically, proceed with the following steps:
›connect the 230 V voltage plug to the local power supply.

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8. Commissioning
8.1 Before commissioning
›Be sure to read and understand the operating manual before putting the device into operation.
›The information for intended use, the operating conditions and the technical specifications must be adhered to.
›The unit must be positioned so that there is no danger of tipping and vibrations are largely intercepted.
›Cables and hoses must be outside of the movement range of the operating personnel (tripping hazard).
›If no hydraulic oil is sucked in during commissioning, switch off the unit, open the cover at the filter housing and fill in approx. 0.3
l hydraulic oil.
›The oil to be filtered must be compatible with the previously filtered hydraulic oil. If this is not the case, the filter unit must be
cleaned and the filter element is to be replaced (see filter element change).
›When using the hoses during unmanned operation, ensure that they might not fall out of the container.
›The suction and discharge pipe must be immersed far enough below the liquid level, so that oil is sucked in.
›The hydraulic fluid must be free of water (no oil turbidity).
›Properly close the cover of the filter housing.
›Manually turn the cover until it stops; a gap between cover and housing may remain visible (see Figure 3).
Fig. 3: Gap at the filter cover
8.2 After switching on
›With 3-phase AC motors check after connecting if the direction of rotation matches with the direction arrow on the motor.
If not, have it changed by an electrician.
›Check the filter unit for leaks.
8.3 In case of power failure
In order to prevent unintentional starting of the unit, always switch off and unplug the unit.
Gap

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9. Operation
CAUTION
Exposure to spilled oil
Injury / risk of slipping
›If oil leaks, the oil-covered area must be shut of immediately and covered with an oil binding medium
(risk of slipping).
Static charge
Sparking
›There is a risk of static charge when using poorly conducting hydraulic or lubricating oils.
In this case, please consult the manufacturer.
NOTE
Damage to the filter unit by missing or defective suction strainer.
Property damage.
›The strainer must be regularly checked according to the maintenance intervals and replaced if necessary.
›The filter unit is provided with a protective strainer at the suction side, which has to be serviced regularly.
A missing protective strainer may lead to destruction of the pump. (Order No. see spare parts list)
›If the protective strainer is removed, the manufacturer will resume no liability.
9.1 Filtering hydraulic fluids when refilling
1. Connect the filter unit to a power source.
2. Place the suction strainer into the oil drum.
3. Place the discharge pipe into a container (e.g. hydraulic tank).
NOTE
Faulty insertion of the discharge pipe
›Make sure that the discharge pipe is below the liquid surface.
4. Turn the filter unit on at the on/off switch (circuit breaker).
5. Check the oil flow on possibly insufficient immersion depth of the suction pipe in the oil tank.
NOTE
›At the beginning of the filtration, filling of the filter unit may take a few seconds.
6. Using the clogging indicator, check the element for clogging at operating temperature of the medium used.
7. Check the filling level at the machine or system and turn off the filter unit at the circuit breaker, once the desired filling
quantity has been reached.
8. Re-attach the suction strainer and the discharge pipe at the appropriate brackets at the filter unit.

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NOTE
Faulty insertion of the discharge pipe
›At the beginning of the filtration, filling of the filter unit may take a few seconds.
NOTE
Reaching the maximum cleaning performance
›In order to prevent a short circuit of the oil flow, the distance between the suction and pressure connection should be kept as
large as possible.
1. Connect the filter unit to a power source.
2. Place the suction strainer into the container of the machine or system (e.g. hydraulic tank).
3. Place the discharge pipe in a container of the machine or system (e.g. hydraulic tank).
4. Turn the filter unit on at the on/off switch (circuit breaker).
5. Check the oil flow on possibly insufficient immersion depth of the suction pipe in the oil tank.
9.2 Filtering liquids in the bypass flow
6. Using the clogging indicator, check the element for clogging at operating temperature of the medium used.
7. At the end of filtration, pull the suction strainer out of the container of the machine or unit (e.g. hydraulic tank) and draw in
air for max. 30 seconds.
Thus, residual oil from the filter housing and the lines above oil level will be returned via the discharge pipe into the tank of
the machine or unit.
8. Turn off the filter unit by using the circuit breaker.
9. Re-attach the suction strainer and the discharge pipe to the appropriate brackets at the filter unit.

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CAUTION
Risks related to chemical reactions
Risk of injury
›Chemical substances in the immediate vicinity of the filter unit may react and lead to destruction of the device
and to injuries of persons who are in the immediate vicinity of the device
›Storage in the immediate vicinity of chemically active substances such as acids, alkalis, salts, organic solvents
and rechargeable batteries is prohibited.
Hydraulic oil spills
Environmental hazard / risk of slipping
›Before maintenance and repair work, completely drain the unit.
›In case of spills, cover the oil-covered surface immediately with an oil-binding medium.
›Then immediately dispose of the oil-binding medium according to the national environmental regulations.
Ignition hazard
Risk of electrostatic charge by poorly conducting hydraulic fluid.
›If the electrical conductivity of the hydraulic fluid is not known, please contact the manufacturer of the
hydraulic fluid.
Risk of burns
Contact temperatures according to DIN EN563 (3) and DIN EN13202 (4) may be exceeded during
operation.
›Allow the filter unit to cool down before touching it.
NOTE
Impaired function by dirt ingress into the pump.
The function of the filter unit is no longer guaranteed.
›During repair work, all parts coming in contact with the hydraulic medium, must be kept free of dirt and chips.
DANGER
Danger to life
Risk of electric shock
›During repair work, turn off the unit and pull the mains plug.
10. Maintenance / repair

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10.1 Maintenance
10.2 Maintenance overview
Except from the filter element and the suction strainer, the filter unit is maintenance-free.
Maintenance work Order No. Maintenance interval
Checking / changing the filter element V7.1220-113 (3 µm)
V7.1220-13 (5 µm)
V7.1220-06 (10 µm)
Once the clogging indicator changes to
the red range at a permissible viscosity
Checking / changing the suction strainer FA 016.0110 quarterly or with corresponding
problems (lower volume flow with clean
filter element, too loud noise level).
Table 6: Maintenance overview
10.2.1 Replacing the suction strainer
NOTE
Damage to the filter unit by missing or defective suction strainer.
Property damage
›The suction strainer must be regularly checked and replaced if necessary, according to the maintenance intervals.
Fig. 4: Changing the suction strainer
Mount the suction
hose and the suction
strainer gap-free!
1. Loosen the hose clamp (1).
2. Disconnect the suction strainer (3) from the suction hose (2).
3. Clean the suction strainer (3) using benzine or diesel fuel.
NOTE
›In case of damage, replace the suction strainer (3) (Order No. FA 008.0110).
4. Push the suction hose (2) - as shown above - onto the suction strainer (3)
5. Attach the hose clamp (1).

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CAUTION
Risk of burns
Contact temperatures according to DIN EN563 (3) and DIN EN13202 (4) may be excee-
ded during operation.
›No fluid may pass through the filter while the filter element is being replaced.
›Allow the filter unit to cool down before touching it.
10.3. Replacing the filter element
1. Pump the filter element dry - (see Chapter 9.2 "Filtering liquids in the bypass flow" Point 7)
2. Turn the filter unit on at the on/off switch (circuit breaker) and pull the mains plug.
10.3.1 Removing the filter element
Fig. 5: Removing the filter element
1. Turn the housing cover (1) counterclockwise.
2. Carefully remove the cover (1) with the filter element (2) from the filter tube.
(The filter element is attached to the cover.
Let the draining oil drip off into the housing.)
Fig. 6: Removing the filter element from the cover
10.3.2 Removing the filter element from the cover
1. Push the filter element at the cover in arrow direction 1 and remove it in
arrow direction 2.
2. Dispose of the filter element according to the national environmental
legislation (Waste code: Oil filter 16 01 07).
Fig. 7: Attaching the filter element
10.3.3 Attaching the filter element
1. Check the filter element type number.
Does the laser inscription on the filter element match with the indications on
the typeplate or in the operating manual?
2. Attach the filter element in arrow direction 2 and lock it in arrow direction 1.
10.3.4 Installing the filter element
1. Always replace the O-ring in the cover, when changing the filter element
(part of the scope of delivery of the filter element)
(O-ring Order No. N007.1175, included in spare filter elements).
2. Carefully insert the cover (1) with the filter element (2) into the filter tube.
3. Screw in the cover manually until it stops.
A gap between cover and filter pipe may remain visible
(see Chapter 8.1 "Before commissioning" / Fig. 3)
Fig. 8: Installing the filter element

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CAUTION
Risk of burns
Contact temperatures according to DIN EN563 (3) and DIN EN13202 (4) may be excee-
ded during operation.
›Allow the filter unit to cool down before touching it.
10.4 Replacing the pump
DANGER
Danger to life
Risk of electric shock
›Before uninstalling, pull the mains plug. Uninstalling may only be carried out by qualified electricians.
Risk of injury
Risk of injury by incorrect handling
›Uninstalling may only be carried out by instructed persons.
Fig. 9: Replacing the motor and the pump