Homa HRS Series User guide

Version 03/2015 - No. 00510601.01
Original Betriebsanleitung
Original Instruction Manual
HOMA Pumpenfabrik GmbH
Industriestr. 1
D-53819 Neunkirchen-Seelscheid
60 Hz
Baureihe / Serie
CHRS
HRS

32
Contents
Contents
Page
1. General Information
33
1.1. Declaration of Conformity
33
1.2. Preface
34
1.3. Proper Use
34
1.4. Copyright
34
1.5. Warranty
34
2. Safety
36
2.1. Instructions and safety information
36
2.2. Guidelines used and CE-certification
36
2.3. General safety
36
2.4. Operating personal
37
2.5. Electrical work
37
2.6. Operating procedure
37
2.7. Safety and control devices
38
2.8. Operation in an explosive atmosphere
38
2.9. Pumped fluids
38
3. General description
38
3.1. Application
38
3.2. Types of use
38
3.3. Construction
38
4. Package, Transport and Storage
41
4.1. Delivery
41
4.2. Transport
41
4.3. Storage
41
4.4. Returning to the supplier
42
5. Installation and Start-Up
42
5.1. General
42
5.2. Installation
42
5.3. Start-Up
45
5.4. Electrical system
45
5.5. Motor protection
46
5.6. Operation with a static frequency converter
46
5.7. activation types
46
6. Maintenance
47
6.1. General
47
6.2. Maintenance
48
6.3. Change of oil
48
7. Additional for explosion-proofed submersible pumps
50
Attachement
8.1 Connection of pumps and mixers
62
8.2. Declaration of contamination
64

33
1. General Information
1.1. Declaration of Conformity
EC Declaration of conformity in line with the EC Machinery Directive 2006/42/EEC, Appendix IIA
We, HOMA Pumpenfabrik GmbH, Industriestrasse 1, D-53819 Neunkirchen-Seelscheid, hereby declare that in
respect to their design and construction the following types, in the form in which they are marketed by us, conform
to the relevant fundamental safety and health requirements of the EC Machine Directives...:
CHRS
HRS
EC-Directives to which the types conform:
EC Machinery Directive
2006/42/EEC
EC Directive, electromagnetic compatibility
04/108/EEC
EC Low Voltage Directive
06/95/EEC
EC Directive, explosion-prooved operating material
94/ 9/EEC
EC Directive, construction products
11/305/EEC
Relevant harmonized industrial standards:
EN 60335-2-41
EN 60335-1
EN 60204 Part 1
EN 61000-6-1
EN 60034-1
EN 61000-6-3
EN 61000-6-2
EN 55014-2
EN 61000-3-3
EN 50014/18/19/20
EN 12050-1-4
EN 61000-6-4
EN 55014-1
EN 61000-3-2
EN ISO 12100-1 and -2
Specially applied national standards and technical specifications (other applied standards for general
mechanical engineering are deposited at the construction office):
ISO 9906
DIN 24250
Vassilios Petridis
Technical Manager
Responsible for technical documents
HOMA Pumpenfabrik GmbH
Industriestr. 1
53819 Neunkirchen-Seelscheid (Germany)
This is an original instruction manual according to the EC Machinery Directive.

34
1.2. Preface
Dear Customer,
Thank you for choosing one of our company’s products. You have purchased a product which has been
manufactured to the latest technical standards. Read this operating and maintenance manual carefully before you
first use it. This is the only way to ensure that the product is safely and economically used.
The documentation contains all the necessary specifications for the product, allowing you to use it properly. In
addition, you will also find information on how to recognize potential dangers, reduce repair costs and downtime,
and increase the reliability and working life of the product.
All safety requirements and specific manufacturer’s requirements must be fulfilled before the product
is put into operation. This operating and maintenance manual supplements any existing national regulations on
industrial safety and accident prevention. This manual must also be accessible to personnel at all times and also
be made available where the product is used.
1.3. Proper use
The HOMA products comply with the valid safety regulations and meet the demands of state-of-the-art
technology. In the event of improper use, there is a danger to life for the user as well as for third parties.
Moreover, the product and/or attachments may be damaged or destroyed.
It is important to ensure that the product is only operated in technically perfect condition and as intended.
To do so, follow the operating instructions.
1.4. Copyright
This operation and maintenance manual has been copyrighted by the manufacturer. This operation and
maintenance handbook is intended for the use by assembly, operating and maintenance personnel. It contains
technical specifications and diagrams which may not be reproduced or distributed, either completely or in part, or
used for any other purpose without the expressed consent of the manufacturer.
1.5. Warranty
Costs for removal and installation of the complained product at the installation place, costs for the ride of the
mechanicians to the location and from the installation place as well as costs for transport are not components of
our warranty. Hereby arose costs, especially costs for checking and transport are bearing by the sender or
operator of the pump. This is also valid for an asserted warranty claim if a check results that the unit works
faultless and is free of defects. All products have a high quality standard. Each product is defeated by a strict
technical end control before delivery. A warranty repair achieved by us does not extend the warranty period.
Replaced spare parts give no reasons for a new warranty period. Extensive claims are excluded, especially such
as diminution, change or compensation also for any kind of follow up damages.
To guarantee a quick transaction of a warranty claim, please return the product together with the warranty receipt,
purchase receipt and declaration of defect carriage paid to the manufacturer (address 1.4.6.).
Claims caused by damages of transport could be only accepted, if the damage is established or confirmed by
delivery in the presence of the forwarder, parcel service, train or post.
1.5.1. General information
This chapter contains the general information on the warranty. Contractual agreements have the highest priority
and are not superseded by the information in this chapter!
The manufacturer is obliged to correct any defects found in the products it sells, provided that the following
requirements have been fulfilled:
• The defects are caused by the materials used or the way the product was manufactured or designed.
• The defects were reported in writing to the manufacturer within the agreed warranty period.
• The product was used only as prescribed.
• All safety and control devices were connected and inspected by authorized personnel.
If no other provisions have been made, the warranty period applies to the first 12 months after initial start-up or to
a max. of 24 months after the delivery date. Other agreements must be made in writing in the order confirmation.
These agreements will remain valid at least until the agreed warranty period of the product has expired.

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1.5.2. Spare parts, add-ons and conversions
Only original spare parts as supplied by the manufacturer may be used for repairs, replacements, add-ons and
conversions. Only these parts guarantee a long working life and the highest level of safety. These parts have
been specially designed for our products. Self-made add-ons and conversions or the use of non-original spare
parts can seriously damage the product and/or injure personnel.
1.5.3. Maintenance
The prescribed maintenance and inspection work should be carried out regularly. This work may only be carried
out by qualified, trained and authorized personnel. The maintenance and inspection log supplied must be
properly updated. This enables you to monitor the status of inspections and maintenance work. Quick repairs
not listed in this operation and maintenance manual and all types of repair work may only be performed by the
manufacturer and its authorized service centres.
1.5.4. Damage to the product
Damage as well as malfunctions that endanger safety must be eliminated immediately by authorized personnel.
The product should only be operated if it is in proper working order. During the agreed warranty period, the
product may only be repaired by the manufacturer or an authorized service workshop! The manufacturer reserves
the right to recall the damaged product to the factory for inspection!
1.5.5. Exclusion from liability
No liability will be assumed for product damage if one or more of the following points apply:
• Incorrect design and on our part due to faulty and/or incorrect information provided by the operator or customer
• Non-compliance with the safety instructions, the regulations and the requirements set forth by German law and
this operating and maintenance manual
• Incorrect storage and transport
• Improper assembly/dismantling
• Improper maintenance
• Unqualified repairs
• Faulty construction site and/or construction work
• Chemical, electrochemical and electrical influences
• Wear
This means the manufacturer’s liability excludes all liability for personal, material or financial injury.
1.5.6. Manufacturer’s address
HOMA Pumpenfabrik GmbH
Industriestrasse 1
D-53819 Neunkirchen-Seelscheid
Phone: +49 2247 / 7020
Fax: +49 2247 / 70244
Email: [e-mail]
Homepage: www.homapumpen.de

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2. Safety
This chapter lists all the generally applicable safety instructions and technical information. Furthermore, every
other chapter contains specific safety instructions and technical information. All instructions and information must
be observed and followed during the various phases of the product's lifecycle (installation, operation,
maintenance, transport etc.). The operator is responsible for ensuring that personnel follow these instructions and
guidelines.
2.1. Instructions and safety information
This manual uses instructions and safety information for preventing injury and damage to property.
To make this clear for the personnel, the instructions and safety information are distinguished as follows:
Each safety instruction begins with one of the following signal words:
Danger: Serious or fatal injuries can occur!
Warning: Serious injuries can occur!
Caution: Injuries can occur!
Caution (Instruction without symbol): Serious damage to property can occur, including irreparable damage!
Safety instructions begin with a signal word and description of the hazard, followed by the hazard source and
potential consequences, and end with information on preventing it.
2.2 Guidelines used and CE certification
Our products are subject to
- various EC directives
- various harmonized standards
- various national standards.
Please consult the EU Declaration of Conformity for the precise information and the guidelines and norms in
effect. The EU Declaration of Conformity is issued in accordance with EU Directive 2006/42/EEC, Appendix II A.
Also, various national standards are also used as a basis for using, assembling and dismantling the product.
These include the German accident prevention regulations, VDE regulations, German Equipment Safety Law etc.
The CE symbol is found either on the type plate or next to the type plate. The type plate is attached to the motor
casing.
2.3 General safety
•Never work alone when installing or removing the product.
•The machine must always be switched off before any work is performed on it (assembly,
dismantling, maintenance, installation). The machine must be disconnected from the electrical
system and secured against being switched on again. All rotating parts must be at a standstill.
•The operator should inform his/her superior immediately should any defects or irregularities occur.
•It is of vital importance that the system is shut down immediately by the operator if any problems
arise which may endanger safety of personnel. Problems of this kind include:
Failure of the safety and/or control devices
Damage to critical parts
Damage to electric installations, cables and insulation.
•Tools and other objects should be kept in a place reserved for them so that they can be found
quickly.
•Sufficient ventilation must be provided in enclosed rooms.
•When welding or working with electronic devices, ensure that there is no danger of explosion.
•Only use fastening devices which are legally defined as such and officially approved.
•The fastening devices should be suitable for the conditions of use (weather, hooking system, load,
etc). If these are separated from the machine after use, they should be expressly marked as
fastening devices. Otherwise they should be carefully stored.
•Mobile working equipment for lifting loads should be used in a manner that ensures the stability of
the working apparatus during operation.
•When using mobile working equipment for lifting non guided loads, measures should be taken to
avoid tipping and sliding etc.
•Measures should be taken that no person is ever directly beneath a suspended load. Furthermore, it
is also prohibited to move suspended loads over workplaces where people are present.
•If mobile working equipment is used for lifting loads, a second person should be present to
coordinate the procedure if needed (for example if the operator's field of vision is blocked).
•The load to be lifted must be transported in such a manner that nobody can be injured in the case of
a power cut. Additionally, when working outdoors, such procedures must be interrupted immediately
if weather conditions worsen.

37
These instructions must be strictly observed. Non-observance can result in injury or serious
damage to property.
2.4. Operating personal
All personnel who work on or with the product must be qualified for such work; electrical work, for example may
only be carried out by a qualified electrician. The entire personnel must be of age.
Operating and maintenance personnel must also work according to local accident prevention regulations.
It must be ensured that personnel have read and understood the instructions in this operating and
maintenance handbook; if necessary this manual must be ordered from the manufacturer in the required
language.
2.5. Electrical work
Our electrical products are operated with alternating or industrial high-voltage current. The local regulations (e.g.
VDE 0100) must be adhered to. The “Electrical connection” data sheet must be observed when connecting the
product. The technical specifications must be strictly adhered to. If the machine has been switched off by a
protective device, it must not be switched on again until the error has been corrected.
Beware of electrical current!
Incorrectly performed electrical work can result in fatal injury!
This work may only be carried out by a qualified electrician.
Beware of damp!
Moisture penetrating cables can damage them and render them useless. Furthermore, water can
penetrate into the motor and cause damage to the terminals or the winding.
Never immerse cable ends in the pumped fluid or other liquids.
2.5.1. Electrical connection
When the machine is connected to the electrical control panel, especially when electronic devices such as soft
startup control or frequency drives are used, the relay manufacturer's specifications must be followed in order to
conform to EMC. Special separate shielding measures e.g. special cables may be necessary for the power supply
and control cables.
The connections may only be made if the relays meet the harmonized EU standards. Mobile radio equipment may
cause malfunctions.
Beware of electromagnetic radiation!
Electromagnetic radiation can pose a fatal risk for people with pacemakers. Put up appropriate signs and
make sure anyone affected is aware of the danger.
2.5.2. Ground connection
Our products (machine including protective devices and operating position, auxiliary hoisting gear) must always
be grounded. If there is a possibility that people can come into contact with the machine and the pumped liquid
(e.g. at construction sites), the grounded connection must be additionally equipped with a fault current protection
device. The electrical motors conform to motor protection class IP 68 in accordance with the valid norms.
2.6. Operating procedure
When operating the product, always follow the locally applicable laws and regulations for work safety, accident
prevention and handling electrical machinery. To help to ensure safe working practice, the responsibilities of
employees should be clearly set out by the owner. All personnel are responsible for ensuring that regulations are
observed. Certain parts such as the rotor and propeller rotate during operation in order to pump the fluid. Certain
materials can cause very sharp edges on these parts.
Beware of rotating parts!
The moving parts can crush and sever limbs. Never reach into the pump unit or the moving parts during
operation. Switch off the machine and let the moving parts come to a rest before maintenance or repair
work!

38
2.7. Safety and control devices
Our products are equipped with various safety and control devices. These include, for example suction strainers,
thermo sensors, sealed room monitor etc. These devices must never be dismantled or disabled.
Equipment such as thermo sensors, float switches, etc. must be checked by an electrician for proper functioning
before start-up (see the “Electrical Connection” data sheet). Please remember that certain equipment requires a
decoder device or relay to function properly, e.g. posistor and PT100 sensor. This decoder can be obtained from
the manufacturer or a specialist electronics dealer.
Personnel must be informed of the installations used and how they work.
Caution
Never operate the machine if the safety and monitoring devices have been removed or damage, or if they
do not work.
2.8. Operation in an explosive atmosphere
Products marked as explosion-proof are suitable for operation in an explosive atmosphere. The products must
meet certain guidelines for this type of use. Certain rules of conduct and guidelines must be adhered to by the
operator as well.
Products that have been approved for operation in an explosive atmosphere are marked as explosion-protected
“Ex”. In addition, an “Ex” symbol must be included on the type plate! When used in an explosive atmosphere, the
additional chapter entitled “Explosion protection according to the …standard” must be observed!
2.9. Pumped fluids
Each pumped fluid differs in regard to composition, corrosiveness, abrasiveness, TS content and many other
aspects. Generally, our products can be used for many applications. For more precise details, see chapter 3, the
machine data sheet and the order confirmation. It should be remembered that if the density, viscosity or the
general composition change, this can also alter many parameters of the product.
When switching the product into another pumped fluid, observe the following points:
•Products which have been operated in sewage or waste water must be thoroughly cleaned with
pure water or drinking water before use.
•Products which have pumped fluids which are hazardous to health must always be decontaminated
before changing to a new fluid. Also clarify whether the product may be used in a different pumped
fluid.
•With products which have been operated with a lubricant or cooling fluid (such as oil), this can
escape into the pumped fluid if the mechanical shaft seal is defective.
Danger - explosive fluids!
It is absolutely prohibited to pump explosive liquids (e.g. gasoline, kerosene, etc.). The products are not
designed for these liquids!
3. General description
3.1. Application
Submersible mixers are used for various applications such as mixing, homogenization and suspension of liquids
with low to medium viscosity. Max. 6% liquids in the medium!
3.2. Types of Use
The motors are designed for continuous operation (S1), maximum 15 starts per hour.
3.3. Construction
The pump consists of the motor and the pump housing as well as the propeller which belongs to it.
All important parts of the pump are characterized by generous dimensioning.

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3.3.1. Type label
3 Ph
3 Ph Ex
No.
3 Ph
3 Ph FM
1
Type description
Type description
2
Serial number
Serial number
3
Impeller diameter
Impeller diameter
4 Temperature of medium Temperature of medium
5
Immersion depth
Immersion depth
6
Weight
Weight
7
Hmax (delivery head max)
Hmax (delivery head max)
8
Hmin (delivery head min)
Hmin (delivery head min)
9
Qmax (delivery volume max)
Qmax (delivery volume max)
10
Standard
Standard
11 Construction product regulations-
test lab
Construction product regulations-
test lab
12a
Year type test
Year type test
12b
Declaration of performance
Declaration of performance
13
Build year
Build year
14
Motor type
Motor type
15
IE-Marking
IE-Marking
16
Frequency
Frequency
17 Voltage – 3-phase Voltage – 3-phase
18
Nominal current 3-phase
Nominal current 3-phase
19
Motor RPM
Motor RPM
20
Voltage – Star connection
Voltage - Star connection
21
Nominal current Star connection
Nominal current Star connection
22
Insulation class
Insulation class
23
Power P1
Power P1
24 Cos phi Cos phi
25
Protection class
Protection class
26
Power P2
Power P2
27 Operating class Operating class
28
Text field sales
Ex-certification number
29
Ex-test lab
30 Ex-Designation
31
Ex-i- power circuit details
32
Text field sales

40
3.3.2. Motor
The three-phase asynchronous motor is made from sheet metal with a double-varnished winding wire as well as
the motor shaft with rotor package. The power supply cable is designed for the maximum mechanical load and is
sealed against water pressure from the pumped liquid. The motor cable lead connections are sealed from the
pumped liquid as well. The bearings used are permanently lubricated maintenance-free antifriction bearings.
All models are available with explosion proof motors according to ATEX Ex II 2 G EExd.
General motor data
Operating mode
S1
Insulation class
H (180°C)
Degree of protection
IP68
Cable length
10 m / 15m
Shaft sealing HRS
CHRS
NBR
Viton
Bearing
one grooved ball bearing (suspension side)
one double-row type angular ball bearing (propeller side)
3.3.3. Control devices
The pump is equipped with various safety and control devices:
Temperature Sensors
The mixers have a set of temperature sensors built in the stator windings.
Standard models have the sensors connected to the motor power supply cable, the wire ends marked T1 and T3.
They must be connected to the safety circuit of the control box in order to provide an automatic re-start of the
motor, when the motor cools.
Explosion proof models with motors up to 15 kW have a set of temperature sensors built-in, with a higher switch-
off temperature, connected to the motor cable, the wire ends marked T1 and T2. They must be connected to a
special relay in the starter box in order to provide manual pump re-start.
All explosion proof models have both sets of sensors built-in, as described above, with wire ends marked T1, T2,
T3. They have to be connected accordingly as described above. The temperature sensor set must be connected
to the switchgear unit so that it switches off if it overheats.
Check of Direction of Rotation
After the electrical connection has been made, check that the agitator propeller is rotating in the correct direction.
As seen from the motor, the propeller must rotate clockwise.
If the direction of rotation of the agitator propeller is incorrect, transpose two of the three conductor phases (L1,
L2, L3) coming directly from the mains.
Beware of rotating propeller!
The moving propeller can crush and sever limbs. Switch off the machine and let the moving parts come to
a rest before maintenance or repair work!
Seal condition sensors oil chamber
Agitator motors in the HRS…/C and CHRS…/C series are fitted as standard with monitoring of the sealing of the
oil barrier chamber.
Two sensors monitor the conductibility of the oil filling. The sensors are to be connected via the connecting cables
with the cable-end designations S1 and S2 in the switchgear to an evaluation instrument with a galvanically
isolated sensor circuit (electrode relay). If the shaft seal leaks, water enters the oil chamber and changes the
resistance of the oil. Response sensitivity should be adjustable from 0-100 kÙ. The standard setting is 50 kÙ. If
this is an antiexplosion design, select electrode relays with intrinsically safe circuits for sensors.
Motor cooling
They are cooled by the surrounding liquid.
3.3.4. Propeller
A self cleaning propeller from stainless steel is used.

41
4. Package, Transport, Storage
4.1. Delivery
On arrival, the delivered items must be inspected for damage and a check made that all parts are present. If any
parts are damaged or missing, the transport company or the manufacturer must be informed on the day of
delivery. Any claim made at a later date will be deemed invalid. Damage to parts must be noted on the delivery or
freight documentation.
4.2. Transport
Only the appropriate and approved fastening devices, transportation means and lifting equipment may be used.
These must have sufficient load bearing capacity to ensure that the product can be transported safety. If chains
are used they must be secured against slipping.
The personnel must be qualified for the tasks and must follow all applicable national safety regulations during the
work.
The product is delivered by the manufacturer/shipping agency in suitable packaging. This normally precludes the
possibility of damage occurring during transport and storage. The packaging should be stored in a safe place if
the location used is changed frequently.
4.3. Storage
Newly supplied products are prepared that they can be stored for 1 year. The product should be cleaned
thoroughly before interim storage.
The following should be taken into consideration for storage:
•Place the product on a firm surface and secure it against falling over. Submersible mixers and
auxiliary lifting devices should be stored horizontally, submersible sewage pumps and submersible
motor pumps should be stored horizontally or vertically. It should be ensured that they cannot bend
if stored horizontally.
Danger from falling over!
Never put down the product unsecured. If the product falls over, injury can occur!
•The product has to be stored at a place free from vibrations and agitation to avoid damage from the
ball bearings. We recommend a dry, frost-protected room with a temperature of between 5 °C and
25 °C for storage.
•The product may not be stored in rooms where welding work is conducted as the resulting gases
and radiation can damage the elastomer parts and coatings.
•It is responsible to take care that the corrosion coating will not be spoiled
•Any suction or pressure connections on products should be closed tightly before storage to prevent
impurities.
•The power supply cables should be protected against kinking, damage and moisture.
Beware of electrical current!
Damaged power supply cables can cause fatal injury! Defective cables must be replaced by a qualified
electrician immediately.
Beware of damp!
Moisture penetrating cables can damage them and render them useless. Therefore, never immerse cable
ends in the pumped fluid or other liquids.
•The machine must be protected from direct sunlight, heat, dust, and frost. Heat and frost can cause
considerable damage to propellers, rotors and coatings.
•The rotors or propellers must be turned at regular intervals. This prevents the bearing from locking
and the film of lubricant on the mechanical shaft seal is renewed. This also prevents the gear
pinions (if present on the product) from becoming fixed as they turn and also renews the lubricating
film on the gear pinions (preventing rust film deposits).
Beware of sharp edges!
Sharp edges can form on rotors and propellers. There is a risk of injuries. Wear protective gloves.
•If the product has been stored for a long period of time it should be cleaned of impurities such as
dust and oil deposits before start-up. Rotors and propellers should be checked for smooth running,
housing coating and damage.

42
•After storage longer than one year the oil of motor and, if necessary the gear have to be changed.
This is also necessary if the product never had run (natural deterioration of mineral oil).
Before start-up, the filling levels (oil, cooling fluid etc.) of the individual products should be checked and
topped up if required. Please refer to the machine data sheet for specifications on filling. Damaged
coatings should be repaired immediately. Only a coating that is completely intact fulfills the criteria for
intended usage!
If these rules are observed, your product can be stored for a longer period. Please remember that elastomer parts
and coatings become brittle naturally. If the product is to be stored for longer than 6 months, we recommend
checking these parts and replacing them as necessary. Please consult the manufacturer.
4.4. Returning to the supplier
Products which are delivered to the plant must be clean and correctly packaged. In this context, clean means that
impurities have been removed and decontaminated if it has been used with materials which are hazardous to
health. The packaging must protect the product against damage. Please contact the manufacturer before
returning!
5. Installation and Start-Up
5.1 General
In order to prevent damage to the mixer or serious injury during installation the following points must be observed:
•Installation work may only be carried out by qualified persons. The safety instructions must be
followed at all times.
•The mixer must be inspected for damages before any installation work is carried out.
•Protect the mixer from frost.
•The operating area must be laid out for each machine. You must ensure that lifting gear can be
fitted without any trouble, since this is required for assembly and removal of the machine.
•The maximum bearing capacity must be greater than the weight of the machine, add-on units and
cable.
•Electric power cables must be laid out in such a way that safe operation and non-problematic
assembly/dismantling are possible at all times.
•The electric power cables should be fastened properly to the pipes with cable holders or other
suitable equipment. This should prevent loose hanging and damage to the electric power cables.
Depending on the cable length and weight, a cable holder should be fitted every two or three
meters.
•The structural components and foundations must be of sufficient stability to ensure safe and
functional operation. The operator or supplier is responsible for the provision.
•Never let the unit run dry.
•Use defector plates for the pumped fluid intake that air cannot introduce into the pumped liquid. this
will lead to that the pump will run smoothly and is subjected to higher wear and tear.
5.2 Installation
Danger of falling!
Installation work for the mixer and its accessories is performed directly on the edge of the basin.
Carelessness or wearing inappropriate clothing could result in a fall. There is a risk of fatal injury! Take
all necessary safety precautions to prevent this.
Mixer
The mixer is delivered ready assembled. During installation of the mixer please check the following:
•Propeller
The propeller must not touch the tank floor or walls in any possible installation position (min. 40 cm
distance).
•Motor Cable
The cable must not be stretched even when the mixer is completely lowered. The cable should be
positioned with always providing large bending radius in order to prevent breaking.
The connecting cable should be guided as tight as possible towards the top, so it is not caught in the
flow.

43
•Operating Voltage / Direction Control
The operating voltage of the system is to check for conformity according to type plate data.
The protective cap located on the cable must be removed just before the electrical connection.
After electrical connection, the correct direction of the stirring propeller mixer must be inspected. The
propeller must rotate clockwise when viewed from the motor.
If the rotational direction of the stirring propeller is incorrect, two of the three conductor phases (L1, L2,
L3) that are directly supplied from the mains must the interchanged.
Assembling the motor bracket to the mixer
Fasten the mixer to the motor bracket (Item 12) as illustrated, using two cylinder head screws (Item 1), one
cylinder head screw (Item 2) and the associated U-washers (Items 3 & 4).
Lay the connecting cable between the pipe clamps (Item 6) and screw it to the motor bracket using two cylinder
head screws and U-washers (Items 5 & 4). Great care should also be taken to ensure that the cable is always laid
or assembled on a large radius, so that any sharp bend in the cable is prevented.
Lowering and guiding mechanisms
Before assembling the lowering and guiding mechanism, the local conditions governing installation (basin shape,
circulation conditions etc.) must be ascertained. It must be ensured that the mixer is freely mobile in the built-in
condition and that additional fittings have no effect on flow.

44
The upper fastening (Item 2) must be attached in the basin first of all. Use the supplied anchor rods and bonding
anchor cartridges for this purpose.
In the next step, attach the square tube (Item 4, to be provided on site) to the upper and lower fastenings (Item 1).
Next, hold the upper fastening on the anchor rods intended for that purpose and fasten the anchor rods with the
nuts. The position of the lower fastening has now been determined. Use the supplied anchor rods and bonding
anchor cartridges for fastening it.
No.
Description
1
lower fastening
2
upper fastening
3
angle clamp bracket
4
square tube
5
mixer
6
motor bracket
7
cable anchor clamp
8
stainless steel wire
9
lifting gear
10
floor-mounted box column

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Now install the angle clamp brackets (Item 3). These represent the bearing point of the motor bracket.
Now lower the mixer on to the bracket in the basin. When the motor bracket lies on the angle clamp bracket, the
connecting cable must be clamped in the cable anchor clamp. At the same time it must be ensured that the cable
is led upwards as tautly as possible so that it is not caught by the delivery flow.
5.3. Start-Up
The mixer must only be started when fully submerged, in order to prevent overheating of the
motor.
Any change of mixer position must only be done with mixer having been switched off and
propeller not rotating.
Before start up, check again that all steps of installation procedure have been properly carried
out. Make sure that the mixer is sufficiently submerged (see chapter 8+9), and that there are no solid
parts in the tank which might damage the propeller. Furthermore, it must be ensured that the mixer is
immersed at least half the diameter of the propeller.
Make sure that all necessary safety precautions have been carried out, e.g. to prevent persons from falling into
the tank. After longer standstill of the mixer, clean the propeller and motor surface from dried remains of mixing
liquid in order to prevent cooling problems.
5.4. Electrical system
Observe the relevant local and national regulations when laying out and selecting the electric lines as well as
when connecting the motor. The motor must be protected by a motor protection switch.
Have the motor connected in accordance with the "Wiring connection" data sheet. Pay attention to the direction of
rotation. If the direction of rotation is incorrect, the machine will not perform as specified, and under certain
circumstances, can become damaged. In accordance with the machine data sheet, check the operating voltage
and make certain that the current consumption remains uniform during all phases.
Make sure that all temperature sensors and monitoring devices, are connected and that their function is tested.
For details on this, see the wiring diagram.

46
Beware of electrical current!
Incorrectly performed electrical work can result in fatal injury.
This work may only be carried out by a qualified electrician.
5.5. Motor protection
The minimum requirement is a thermal relay / motor protection switch with temperature compensation,
differential triggering and an anti-reactivation device in accordance with VDE 0660 or the appropriate national
regulations. If the machines are connected to electrical systems in which faults frequently occur, we recommend
installing additional protective devices (overvoltage, undervoltage or phase failure relays, lightning protection).
Local and national regulations must be adhered to when connecting the machine.
5.6. Operation with a static frequency converter
The following points must be observed when operating the converter:
•The pump is suitable for operation with the frequency converter according to DIN EN 60034-17.
•Voltage peaks at the motor winding must be avoided and, where appropriate, suitable filters must be
provided in the motor lead.
•The proper grounding of the entire system must be ensured.
•The specifications of the frequency converter manufacturer must be observed.
•Under certain circumstances, a shielded cable is necessary to comply with EMC directives.
•The information sheet "Using HOMA pumps with the frequency converter" must be observed.
5.7. Activation types
Activation types for cables with free ends (without plugs)
Star-delta activation
If the motor protection is installed in the line:
Set the motor protection to 0.58 x the rated current. The maximum start-up time in star-delta mode is 3 seconds. If
the motor protection is not installed in the line, set the motor protection to the rated current when fully loaded.
Starting transformer/soft start
Motor protection should be set to the rated current when fully loaded. At partial load, we recommend that motor
protection is set 5% above the measured current at the operating point. The maximum start-up time at reduced
voltage (approx. 70%) is 3 seconds.
Operation with frequency transformers
The machine can be operated on frequency transformers. Observe chapter 5.6 of this manual.
If the submersible mixers are operated with a frequency converter type HRG185, the evaluation of the PTC
thermistor must be done via a RL94/9/EC function-tested triggering device.
5.7.1. After Start-Up
The rated current is briefly exceeded during the start-up procedure. Once this process has ended, the operating
current should no longer exceed the rated current.
If the motor does not start immediately after the machine is switched on, it must be switched off immediately. The
start pauses specified in the technical data must be adhered to before starting up again. If the fault recurs, the
machine must be switched off again immediately. The machine may only be started again once the fault has been
rectified.
The following items should be monitored:
•Operating voltage (permissible deviation +/- 5% of the rated voltage)
•Frequency (permissible deviation -2% of the rated frequency)
•Current consumption (permissible deviation between phases is a maximum of 5%)
•Voltage difference between the individual phases (max. 1%)
•Starts and stops per hour (see technical data)
•Minimum water immersion level, level control unit, dry-run protection
•Smooth running
•Check for leaks, if need be, follow the necessary steps as set out in “Maintenance”

47
6. Maintenance
6.1 General
The machine and the entire system must be inspected and maintained at regular intervals. The time limit for
maintenance is set by the manufacturer and applies to the general conditions of use. The manufacturer should be
consulted if the system is to be used with corrosive and/or abrasive pumped liquids, as the time limit between
inspections may need to be reduced.
Note the following information:
•The operating and maintenance manual must be available to the maintenance personnel and its
instructions followed. Only the repair and maintenance measures listed here may be performed.
•All maintenance, inspection and cleaning work on the machine and the system may only be carried
out by trained specialists exercising extreme care in a safe workplace. Proper protective clothing is
to be worn. The machine must be disconnected from the electricity supply before any work is carried
out. There must be no way that it can be inadvertently switched on. Additionally, the appropriate
protective measures as defined by the BGV/GNV should be enforced when working in basins and/or
containers.
•Above a weight of 50kg, only hoisting gear which has been officially approved and which is in a
technically perfect condition should be used for lowering and raising the machine.
Make sure that all fastening devices, ropes and safety devices of the hand winch are in a technically
perfect condition. Work may only commence if the auxiliary hoisting gear has been checked and found to
be in perfect working order. If it is not inspected, danger to personnel may result!
•Wiring work on the machine and system must be carried out by an electrician. For machines
approved for work in areas subject to explosion danger, please refer to the “Explosion protection in
accordance with the regulation” chapter.
•When working with inflammable solvents and cleaning agents, fires, unshielded lighting and
smoking are prohibited.
•Machines which circulate fluids hazardous to health, or which come into contact with them, must be
decontaminated. It must be ensured that no dangerous gases can form or are present.
•Ensure that all necessary tools and materials are available. Tidiness and cleanliness guarantee safe
and problem-free operation of the machine. After working on the machine all cleaning materials and
tools should be removed from it. All materials and tools should be stored in an appropriate place.
•Operating supplies such as oil and lubricants must be collected in appropriate vessels and properly
disposed of (in accordance with the 75/439/EEC directive and with §§5a, 5b AbfG). Appropriate
protective clothing is to be worn for cleaning and maintenance jobs. This is to be disposed of in
accordance with waste code TA 524 02 and EC Directive 91/689/EEC. Only lubricants expressly
recommended by the manufacturer may be used. Oils and lubricants should not be mixed. Only use
genuine parts made by the manufacturer.
A trial run or functional test of the machine must be performed as instructed in the general operating
conditions.
Before maintenance or repair disconnect the mixer from the power supply to prevent accidental starting
of the mixer!
In accordance with the product liability law we point out that we shall not be liable for damages caused by
our product due to unauthorized repair by persons other than the manufacturer or an authorized workshop or due
to the use of spare parts other than original HOMA parts. The same product liability limitations are valid for
accessories.
Before maintenance or repair make sure that all rotating parts stand still!
Before carrying out maintenance and service, the mixer must be thoroughly flushed with clean water.
When loosening of the oil chamber control screw, overpressure can escape. Release the screw only
when pressure balance is secured.
If not otherwise stated, the torque values of the be-low tables should be used.
Values stated are for clean, lubricated screws.

48
Fixing torque [Nm] for screws A2/A4
(Coefficient of friction = 0,2)
A2/A4,
Hardeness class 70
A2/A4,
Hardeness class 80
DIN912/DIN933
DIN912/DIN933
M6
7 Nm
11,8 Nm
M8
17 Nm
28,7 Nm
M10
33 Nm
58 Nm
M12
57 Nm
100 Nm
M16
140 Nm
245 Nm
M20
273 Nm
494 Nm
6.2. Maintenance
It is imperative to keep a maintenance list to be always informed about the submersible mixer. This list must be
presented to the trade association, the technical inspection agencies and the manufacturer of the system or of the
mixer when requested.
The full warranty requires the annual inspection of the mixer by the manufacturer of the system or of the mixer.
6.2.1. General (Monthly or every 500 operating hours)
Clean the mixer from all attached solids. Check the motor cable for damages. In case of any damages of cable
surface replace cable through mixer manufacturer or authorized repairshop.
Check mixer painting and surface for scratches or damages. Repaint surface or replace damaged parts.
6.2.2. Electric Motor
The current consumption must be checked for all 3 phases monthly. Damages of the motor, transmission and
bearing can be detected via the power consumption.
Lubrication: The bearings are lubricated for life (when noises arise, bearings must be replaced at the manu-
facturer's works).
The oil in the oil chamber should be changed after every 6000 hours of operation.
Oil condition: Place mixer horizontally so that one of the oil chamber screws is at the top. Remove the screw and
extract a small amount of oil. If the oil is milky or cloudy, it indicates a defective shaft seal. In this case, have the
condition of the shaft seals checked by HOMA-workshop or factory service.
Replace shortages
Isolation test: If the insulation resistance is less than 2 megohms, do not turn the submersible mixer on. (Mea-
suring DC voltage 1500 Volts).
6.2.3. Stirring Propeller
Inspection: Inspect the stirring propeller periodically. Remove random wound foreign bodies such as twines,
cords, etc. They can cause uneven running and thus create strong vibrations in the system and can lead to
damage on the mixer components. With uneven running, the stirring propeller must be cleaned.
6.3. Change of oil
Change oil only with motor at operation temperature. Note that the mixer must be in a horizontal
position when changing oil.
When releasing the oil level screws, excess pressure may escape from the oil chamber or the gearbox. Only
remove the screws completely after the pressure was equalized.
The thread and the magnets (on the gearbox) of the screws must be clean before screwing them back on.
The sealing rings must be always replaced with new parts.

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6.3.1 Oil chamber
Oil specification: bio degradable Shell Ondina 917. Remove used oil according to local regulations! Oil capacity is
1,0 liter.
Steps:
1. Remove screw
2. Release oil
3. 4. Fill in correct quantity of oil (see below table)
5. Re-fasten screw

50
7. Additional for FM submersible pumps
7.1. GENERAL INSTRUCTIONS
This manual is intended to provide basic installation and start-up guidance. It is to be read and thoroughly studied
prior to attempting to install or operate any of the equipment supplied. Equipment damage, which occurs by not
following these instructions will void the warranty.
7.2. SAFETY PRECAUTIONS
Only trained qualified personnel shall be utilized for installation and start-up.
The following is a general list of safety precautions that should be followed when installation starting-up or
servicing the pump.
The pump station owner or operator is ultimately responsible for ensuring that all equipment is installed,
started up and operated in a safe manner.
•Do not work alone.
•Double check to make sure that all lifting equipment is in good working order and that it has adequate lifting
capacity for the weight that it will handle.
•Wear safety helmet, goggles and protective shoes, or appropriate safety materials required.
•Before working on the pump make sure that the power is disconnected and cannot be energized by others.
Lockout and tag the control panel circuit breaker.
•Do not stand under suspended loads!
•Never enter or work within a wet well without first checking to make sure sufficient oxygen is present and that
there are no explosive or poisonous gases present.
•All personnel, who work with sewage pumping equipment and systems shall be vaccinated against diseases
that can occur. If there are any questions or doubts in this area it is strongly suggested that the local health
agency be contacted.
•For Hazardous Area Classifications, only use pumps with suitable Explosion Proof Rating.
7.3. EQUIPMENT INVENTORY AND INSPECTION
Upon arrival of pump shipment carefully unpack all components and compare with shipping and purchase order
documents to ensure that the order is complete. Also inspect equipment for any damage that might have occurred
in shipment. If any problems are detected contact an authorized HOMA customer service immediately.
7.4. TRANSPORTATION AND STORAGE PROCEDURE
Always lift the pump by its lifting bail or eye bolt.
Never lift the pump by its power cable! Jacketed pump should never stored or shipped with the
pump by the jacket. Damage to Sealing O ring may result.
Pumps should be stored in an upright position, taking extreme care to protect the power cable and control cables
from crushing, nicks or tears which would permit water intrusion.
Power cable ends must be protected from immersion in water as well as moisture intrusion. The cable will wick
water into the pump if it is not protected properly. Power cable leads should be covered with shrink tubing or
suitable sealing material during storage.
Short Term Storage: Short term storage is defined as any time less than six months. We recommend that pump
and accessories be stored in its original shipping container in a dry, temperature controlled area. If climate
controlled storage is not possible, all exposed parts should be inspected before storage and all surfaces that have
the paint scratched, damaged or worn should be re-coated with air dry enamel paint. The pump should be stored
in an upright position.
Long Term Storage: Any storage time exceeding six months is considered long term. In addition to the
safeguards specified above, the impeller should be rotated once a month to prevent the mechanical seals from
being damaged, and the pump should be inspected. The seal chamber oil should be drained and replaced prior to
commissioning. The pump should be stored in an upright position.