Joh. Müller Kunststoff ML 75 User manual

Lescheider Weg 6-8 • D-53773 Hennef-Bierth • Tel. [phone] • Fax -79 • www.kunststoff-mueller.de
High performance radial fans
Series
ML/ MLF/ MLT 75 and 110
Operating Instructions 06/2013

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Introduction
Manufacturer and suppliers
Declaration of conformity
Subject matter of the operating instructions
Symbols used
Safety instructions
Product description
Planning use
Installation and assembly
Commissioning
Operation
Maintenance, cleaning and repair
Warranty
Appendices A.x
1
2
3
4
5
6
7
8
9
10
11
12
Ax
13

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Table of contents
1Introduction................................................................................................................................... 5
2Manufacturer and suppliers......................................................................................................... 6
2.1 Manufacturer................................................................................................................................................6
2.2 Customer Service........................................................................................................................................6
2.3 Suppliers ......................................................................................................................................................6
3Declaration of conformity ............................................................................................................ 7
3.1 EU Declaration of Conformity within the meaning of the EU Machinery Directive (2006/42/EU), Low
Voltage Directive 2006/95/EU and EMC Directive 2004/108/EU...............................................................7
4Subject matter of the operating instructions.............................................................................. 8
5Symbols used............................................................................................................................... 8
6Safety instructions ....................................................................................................................... 9
7Product Description ................................................................................................................... 11
7.1 Fan design..................................................................................................................................................11
7.1.1 ML 75 and ML 110 ..................................................................................................................................11
7.1.2 MLF / MLT 75 and MLF / MLT 110 .........................................................................................................11
7.2 Fan materials..............................................................................................................................................13
7.3 Proper use..................................................................................................................................................13
7.4 Improper use..............................................................................................................................................14
7.5 SPECIFICATIONS.......................................................................................................................................15
7.5.1 ML 75 and ML 110 ..................................................................................................................................15
7.5.2 MLF 75 and MLF 110..............................................................................................................................16
7.5.3 MLT 75 and MLT 110..............................................................................................................................17

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7.6 Labelling.....................................................................................................................................................18
7.7 Electricity supply.......................................................................................................................................19
8Planning use............................................................................................................................... 19
8.1 Transport....................................................................................................................................................19
8.2 Storage........................................................................................................................................................20
8.3 Disposal......................................................................................................................................................20
9Installation and assembly.......................................................................................................... 20
9.1 Electrical connection.................................................................................................................................21
10 Commissioning........................................................................................................................... 22
11 Operation .................................................................................................................................... 22
11.1 Troubleshooting ........................................................................................................................................22
12 Maintenance, cleaning and repair ............................................................................................. 25
12.1 Maintenance and cleaning........................................................................................................................25
12.2 Carrying out maintenance work...............................................................................................................26
12.3 Repair..........................................................................................................................................................27
13 Warranty...................................................................................................................................... 27
Appendix
A.1 Check list maintenance 28
A.2 bis A.5 Performance data 30
A.6 scope of delivery 34
A.7 Notes 39

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1 Introduction
These operating instructions
 Are to be considered part of the product.
 Are to be read carefully and thoroughly by the operator/s of the fan/s before
first use of same.
 The safety information contained herein must be adhered to.
 The operating instructions are to be passed on to subsequent owners and
operators of the equipment.
 Please contact Joh. Mueller Kunststoff GmbH if you have any queries. Do not
operate a fan if there is any doubt as to its proper condition or assembly.
 This/these fan/s may only be assembled, installed and operated by properly
qualified persons.
 Note the symbols used drawing attention to specific risks and supplying
information on same.
 The enclosed operating instructions for the motor must also be adhered to
and are a major part hereof.
 No liability whatsoever can be accepted for damage due to disregarding the
operating instructions.
 The operating instructions for the motor installed can be downloaded from the
Joh. Mueller Kunststoff GmbH web site as a pdf file. Same can be supplied by
us in hardcopy form if desired.

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2 Manufacturer and suppliers
2.1 Manufacturer
Joh. Mueller Kunststoff GmbH
Lescheider Weg 6-8 Tel. [phone]
53773 Hennef-Bierth Fax. [phone]
Germany Internet. www.kunststoff-mueller.de
2.2 Customer Service
Joh. Mueller Kunststoff GmbH
Lescheider Weg 6-8 Tel. [phone]
53773 Hennef-Bierth Fax. [phone]
Germany Internet. www.kunststoff-mueller.de
2.3 Suppliers
See the appendix on scope of delivery

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3 Declaration of conformity
3.1 EU Declaration of Conformity within the meaning of the EU Machinery Directive
(2006/42/EU), Low Voltage Directive 2006/95/EU and EMC Directive 2004/108/EU
Joh. Mueller Kunststoff GmbH, Lescheider Weg 6-8, D-53773 Hennef-Bierth, declare that the machine
described below complies in its design and construction and in the version marketed by them with the
applicable health and safety requirements of the EU Machinery Directive and the requirements of the
EMC and Low Voltage Directives. This declaration becomes invalid should the machinery be modified
without our consent.
Machine description Radial fan
Machine type Series ML-/ MLF-/ MLT- 75 and -110 Ex
Machine no. See Appendix A6
Relevant EU Directives
Directive / standard Text
2006/42//EU EU Machinery Directive - Directive of the European Parliament and Council
on Machinery
2006/95/EU Low Voltage Directive
2004/108/EU Electromagnetic Compatibility Directive
Harmonised standards applied:
DIN EN ISO 12100 Safety of Machinery - General Design Principles - Risk Evaluation and Risk
Reduction
DIN EN ISO 13857:2008 Safety of Machinery - Safety Spacing to Prevent Proximity to Danger Areas
of Upper and Lower Extremities
DIN EN 62079: 2001 Drafting instructions - classification, content and presentation
prEN 14461: 2002 Industrial fans - safety requirements
Applied national standards and technical specifications
VDMA 24 167: 1994 Fans; safety requirements
Name and address of the person authorised to put together the technical documentation:
Thomas Scheffler, Joh. Mueller Kunststoff GmbH, Lescheider Weg 6-8, D-53773 Hennef-Bierth
Hennef-Bierth, 27 May 2013
Thomas Scheffler, Managing Director

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4 Subject matter of the operating instructions
The operating instructions only apply to the fan/s supplied including assembly frame/s, flange/s and
motor/s. The interfaces for the ML series are the sleeves and for the MLF and MLT series the flanges
for connection to the piping system.
5 Symbols used
Caution. Non-compliance may result in injury or damage.
Note. Important information
Prohibition!
Danger due to electricity.
Hot surface
Risk of crushing
Risk of ingestion
General instruction (e.g. wear protective clothing)
Release before performing any work

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6 Safety instructions
As operator you’re responsible for
ensuring fans are only used if in technically problem-free condition, only for their
intended purpose and in compliance with these operating instructions.
Ensuring staff are aware that proper use includes adherence to the maintenance
requirements.
Ensuring technical and safety familiarisation of staff with the equipment. Staff
knowing the operating instructions.
Ensuring fan operation conditions are adhered to.
The fans can be operated up to a maximum ambient temperature of 40° C and in the
temperature ranges in table 4 with the pumping media. At operating temperatures exceeding
the maximum permissible (see table 4) the operator must determine and then exclude
additional risks.
Fan RPM can be safely limited (see scope of delivery in Appendix) – Maximum Permissible
RPM).
Protective clothing must be worn when performing assembly, repair or maintenance work on a
fan.
Electric power connection/s must be installed by a qualified electrician.
The motor must be electrically dead before work is carried out on a fan and also protected
against unauthorised / unintentional switching on by a maintenance switch with lock.
The fan has no shaft bushing and cannot be considered leakproof; absolute leakproofing cannot
be guaranteed and this includes flange connections.
Pumping media that may involve contamination make an upstream filter or mist eliminator
essential.
The fans ought to be installed in separate rooms for noise abatement reasons.
People should stay away from the fans, particularly the housings.

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The conformity declaration is rendered invalid if a fan is modified by e.g. adding a frequency
converter or metrology equipment, and the operator must then declare conformity themselves
after risk analysis.
Fan operating temperature may not fall below the lower melting point of the medium being
pumped.
Fluid drainage in the spiral housing must be continuous. The atmosphere in the interior must not
leak out, e.g. through immersion or use of a siphon.
Earth the fans using the earthing points provided.

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7 Product Description
7.1 Fan design
7.1.1 ML 75 and ML 110
Illustration 1: Radial fans, series ML-75 and ML-110
Item
Description
Item
Description
1
Fan housing
5
Vibration dampers (4 pcs.)
2
Rotor
6
Motor
3
Clamping sleeve
7
Bushing, pressure side, with pipe clamp
4
Fan block
8
Bushing, suction side, with pipe clamp
Table 1: Details of ML 75 and ML110 Ex fan (illustration 1)
7.1.2 MLF / MLT 75 and MLF / MLT 110
Illustration 2: Radial fan, series MLF 75

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Illustration 3: Radial fan, series MLF 110
Illustration 4: Radial fan, series MLT 75 and MLT 110
Item
Description
Item
Des
cription
1
Fan housing with rotor
MLF: plastic rotor
MLT: Stainless steel cylindrical rotor
4
Pressure brackets
2
Motor
5
Fastening flange
3
Intake fitting
Table 2: Details of fan series MLF / MLT 75 and 110 Ex (illustrations 2, 3 and 4)
Joh. Mueller Radialventilatoren series ML-, MLF- and MLT are radial fans with suction on one side.
Gaseous media are sucked in axially to the drive axle, redirected by rotor movement by 90 degrees and
radially expelled.
The fans in series ML-, MLF- and MLT- 75/ - 110 consist of housing, rotor and drive motor. They are
supplied with direct drive as standard (design D) with the rotor directly connected to the drive motor
shaft. By contrast with the ML series with their assembly frames of sectional steel the MLF and MLT
series are of flange design. The housings of the radial fans in the ML and MLF series are made of

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thermoplastics using a deep draw process; those of the MLT series are made employing a press
process and then welded. Possible housing settings are named per VDMA 24165.
The radial fan housings in the ML / MLF/ MLT 75/110 series must be equipped with safety grilles on
both the pressure and suction sides. If same are not included in the scope of delivery then they must be
installed by the operator.
The rotors in the ML and MLF 75/110 series are made of thermoplastics using the injection moulding
process; those in the MLT series of 1.4301 stainless steel with a higher number of blades.
The fans in the ML/ MLF/ MLT75 and 110 series do not have shaft bushing as standard.
Data on radial fans supplied including drive motor/s is contained in Appendix A6.
7.2 Fan materials
The permissible total temperatures of the thermoplastics used are as below.
Plastic
Temperature range
min. / max.
Plast
ic
Temperature range
min. / max.
PVC 0 °C to +50 °C PE -20 °C to +60 °C
PP/ PPS -20 °C to +70 °C PVDF -10 °C to +100 °C
Table 3: Temperature range of the plastics used
The total temperatures the plastics used can stand may not be exceeded or undercut. At temperatures
below zero the risk of fracture increases if mechanically loaded.
The maximum ambient temperature for drive motors is 40 °C.
7.3 Proper use
The fans in series ML-, MLF- and MLT- 75/ - 110 are intended for use in pumping gaseous
media free of dust.
Radial fans of the series ML-/ MLF-I/ MLT-75 and -110 are solely intended for use in piping systems.
Before using them it must first be determined that the entire plant concerned complies with EU
Machinery Directive RL2006/42/EU.

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The operating conditions below must be adhered to.
Fan vicinity
Pumped media
Temperature min.
Max. > -20 °C < 40 °C Plastic/s used PP/PPS/PVDF
> 0 °C
< 60 °C
Plastic/s used PE
> 0 °C
< 50 °C
Plastic/s used PVC
> 0 °C
< 40 °C
Min. /max. pressure +/- 30 mbar overpressure
Table 4: Operating conditions
If gas inlet temperatures exceed those above the operator must check the explosion parameters
of the explosive atmosphere and determine the risks involved in order to avoid or prevent same.
7.4 Improper use
The radial fans of the ML/ MLF/ MLT 75 and 110 Ex series may not be used
in areas at risk of explosion classified as Zone 0 or 1 or 2 and may not be installed in said zones.
They are not suitable for pumping dust, poisonous vapour or media that corrode the fan material.
In areas where high dust contamination prevails cleaning intervals must be shortened
appropriately.
Do not use improperly.

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7.5 SPECIFICATIONS
7.5.1 ML 75 and ML 110
Type (∅
∅∅
∅D)
L
l
B
B
1
H
h
a
b
m
∅
∅∅
∅d
Max.
kg
ML-75 160 89 150 95 285 125 90 82 51 7 8
ML-110 120 150 160 120 300 150 125 116 114 7 11
The right to make changes is reserved.
Table 5: Technical data of ML75 and ML110 radial fans

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7.5.2 MLF 75 and MLF 110
Illustration 5: Technical data of the MLF 75 series
Illustration 6: Technical data of the MLF 110 series

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7.5.3 MLT 75 and MLT 110
Illustration 7: Technical data of the MLF 75 series
Illustration 8: Technical data of the MLF 110 series with standing console

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Illustration 9: Technical data of the MLT 110 model with special console for vertical installation
Possible alignments for fans of the ML series. The GR alignment is shown (GL is the mirrored
design).
7.6 Labelling
The following data characterise the fan type, performance and uses and hence the proper use.
Type plate data.

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Type plate and warnings must always be legible. If it is ascertained during maintenance that
they are illegible or missing then they must be cleaned or replaced.
Type plate data for the radial fan supplied is given in Appendix A6.
7.7 Electricity supply
A terminal box or maintenance switch can be supplied to connect the fan to the electricity supply as
desired. A maintenance switch can be provided to switch the fan electrically dead when carrying out
maintenance and repair work (see scope of delivery in Appendix A6.
8 Planning use
8.1 Transport
Joh. Mueller radial fans are supplied pre-assembled in sealed foil packaging on a pallet ex works.
Vibration dampeners are pre-installed if supplied.
Check on receipt of the goods whether the fan/s has/have suffered shipping damage as later complaint
cannot be accepted. Pay close attention to motor installation and rotor shaft.
Move the fan with care as plastics are sensitive to shocks and impacts at low temperatures.
If transported on a lorry fans must be secured against tipping, falling over, moving etc.
Check lifting equipment beforehand.
Adhere to the weights in 7.5.

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8.2 Storage
The fan/s must be stored in closed dry rooms where as even a temperature as possible prevails. This
must be above 0 °C and below 40 °C. Avoid direct sunlight, high humidity and dusty, corrosive
atmospheres and substances, vibrations and shocks.
If stored or turned off for a long time the shafts must be turned once a year to keep them
rotatable. Adhere to the motor information given in the operating instructions.
Please also refer to the motor operating instructions.
8.3 Disposal
Please commission a disposal company to dispose of the equipment properly. Currently valid
environmental law must be observed.
Before disposal clean the components to prevent their presenting any environmental risk or danger to
persons.
Observe environmental rules during disposal.
9 Installation and assembly
Installation and assembly of the radial fans should only be carried out by properly qualified staff
of Joh. Mueller Kunststoff GmbH or specialists commissioned by the client for the purpose.
Before the fan unit/s is/are installed the operator must ensure all due allowance has been made for
ambient conditions of same (plastics, motor, electrical components).
The fans must be installed on a flat surface using vibration dampers and aligned horizontally.
The operator must make all due allowance for fan noise when siting them. They ought preferably to be
installed in separate rooms for noise abatement reasons.
Before connecting them to the power supply turn the rotor to ensure it moves freely.
Install piping. If the scope of the commission doesn’t include piping installation then this must be done
by the operator.