Colasit CMVpro 125-400 ATEX User manual

Operating instructions
CMVpro 125-400 ATEX
Centrifugal fan
Your point of contact:
Version 1-en | 11/2021
Colasit Representative
Street
Location

Revision history table
Version Description Date Name
1-en EU/ATEX First version published. 11/30/2021 A. Roth
Document identification
Translation of the original German operating instructions.
Colasit TD-000828
Contact information
Manufacturer
COLASIT AG
Faulenbachweg 63
CH-3700 Spiez
E-mail: [email protected]
Phone: [phone]
Importer
Name
Street
Location
E-mail
Phone
Distributor
Name
Street
Location
E-mail
Phone

Table of contents
Operating instructions CMVpro 125-400 ATEX | Version 1-en 3 / 88
Table of contents
1 Operating instruction information ...................................................................... 7
1.1 Further applicable documents ................................................................................ 7
1.2 Copyright ................................................................................................................ 8
2 Additional safety instructions ............................................................................. 9
2.1 Use and storage of the operating instructions ........................................................ 9
2.2 Intended application of the fan ............................................................................... 9
2.2.1 Intended use .............................................................................................. 9
2.2.2 Reasonably foreseeable misuse................................................................ 12
2.2.3 Equipment limits......................................................................................... 12
2.2.4 Residual risks............................................................................................. 13
2.3 Target groups and personnel requirements ........................................................... 14
2.3.1 Operator..................................................................................................... 14
2.3.2 Transport personnel................................................................................... 15
2.3.3 Mounting personnel ................................................................................... 15
2.3.4 Operating personnel .................................................................................. 16
2.3.5 Maintenance personnel.............................................................................. 16
3 Essential safety instructions............................................................................... 17
3.1 Notation of safety instructions ................................................................................ 17
3.2 Personal protective equipment ............................................................................... 18
3.2.1 Personal protective equipment for potentially explosive environments ..... 19
3.3 Mechanical hazards................................................................................................ 19
3.4 Electrical hazards ................................................................................................... 20
3.4.1 Danger due to electromagnetic interferences ............................................ 20
3.5 Explosion hazards .................................................................................................. 21
3.6 Thermal hazards..................................................................................................... 21
3.7 Noise hazard .......................................................................................................... 21
3.8 Conveyed medium hazards.................................................................................... 22
3.9 Dangers due to insufficient safety .......................................................................... 22
3.10 Actions to take in an emergency ............................................................................ 22
4 Explosion protection............................................................................................ 24
4.1 Explosion protection measures .............................................................................. 24
4.2 Explosion protection marking ................................................................................. 25
5 Structure and function ......................................................................................... 26
5.1 Overview................................................................................................................. 26
5.2 Signs and warning symbols on the fan................................................................... 27
5.3 Options and accessories ........................................................................................ 28
5.3.1 Vibration absorbers.................................................................................... 28

Table of contents
4 / 88 Operating instructions CMVpro 125-400 ATEX | Version 1-en
5.3.2 Sleeves ...................................................................................................... 29
5.3.3 Sleeves with flange .................................................................................... 29
5.3.4 Flange connections.................................................................................... 29
5.3.5 Condensate drain....................................................................................... 30
5.3.6 Isolation switch........................................................................................... 30
5.3.7 Frequency converter (FC).......................................................................... 30
5.3.8 Speed adjustment potentiometer ............................................................... 31
5.3.9 Wall bracket ............................................................................................... 31
5.3.10 Motor cover ................................................................................................ 31
5.3.11 Protective grid ............................................................................................ 32
5.3.12 Hub seal..................................................................................................... 32
6 Transport............................................................................................................... 33
6.1 Safety instructions .................................................................................................. 33
6.2 Incoming goods inspection ..................................................................................... 33
6.3 Packing................................................................................................................... 34
6.4 Intermediate storage............................................................................................... 34
6.5 Transport to installation location............................................................................. 34
6.5.1 Transport by crane..................................................................................... 34
6.5.2 Transport by pallet stacker or forklift.......................................................... 35
7 Mechanical installation ........................................................................................ 36
7.1 Safety instructions .................................................................................................. 36
7.2 Installation location requirements ........................................................................... 36
7.3 Splinter protection - check proper mounting........................................................... 37
7.4 Vibration absorbers mounting................................................................................. 38
7.5 Foundation mounting.............................................................................................. 39
7.6 Wall mounting......................................................................................................... 39
7.7 Ceiling mounting..................................................................................................... 41
7.8 Connecting fan to ductwork .................................................................................... 41
7.9 Connecting condensate drain to siphon ................................................................. 42
7.9.1 Siphon calculations and execution............................................................. 43
7.10 Final inspection....................................................................................................... 44
8 Electrical installation............................................................................................ 45
8.1 Safety instructions .................................................................................................. 45
8.2 Electrical protective devices ................................................................................... 45
8.2.1 Isolation switch installation......................................................................... 45
8.2.2 Motor protection switch installation ............................................................ 46
8.2.3 PTC thermistor tripping device installation................................................. 46
8.2.4 Starting current limiter................................................................................ 47
8.3 Instructions for frequency converter (FC) use ........................................................ 47
8.3.1 Frequency converter (FC) installation options ........................................... 48

Table of contents
Operating instructions CMVpro 125-400 ATEX | Version 1-en 5 / 88
8.3.2 Frequency converter (FC) parameterization .............................................. 50
8.3.3 Connecting the electric motor to a frequency converter (FC) .................... 50
8.4 Making ATEX-compliant ground connections......................................................... 52
8.5 Connecting the electric motor................................................................................. 52
8.6 Mounting motor cover............................................................................................. 54
8.7 Final inspection....................................................................................................... 54
9 Placement in service ............................................................................................ 56
9.1 Safety instructions .................................................................................................. 56
9.2 Carrying out placement in service .......................................................................... 56
9.2.1 Check motor rotation direction ................................................................... 56
9.2.2 Functional test of the frequency converter (FC, optional accessory)......... 56
9.2.3 Conduct test run......................................................................................... 57
10 Operation............................................................................................................... 59
10.1 Safety instruction .................................................................................................... 59
10.2 Operating instructions............................................................................................. 59
10.3 Outside cleaning..................................................................................................... 59
11 Maintenance.......................................................................................................... 60
11.1 Safety instructions .................................................................................................. 60
11.2 Maintenance table .................................................................................................. 61
11.3 Maintenance work .................................................................................................. 61
11.3.1 Check operating condition ......................................................................... 61
11.3.2 Inside inspection ........................................................................................ 62
11.3.3 Inside cleaning ........................................................................................... 62
11.3.4 Annual inspection....................................................................................... 62
12 Repair .................................................................................................................... 64
12.1 Safety instructions .................................................................................................. 64
12.2 Fault table............................................................................................................... 64
12.3 Spare parts and wear parts .................................................................................... 69
12.4 Preparation for repairs............................................................................................ 69
12.5 Impeller exchange .................................................................................................. 70
12.6 Casing exchange.................................................................................................... 72
12.7 Electric motor exchange ......................................................................................... 73
12.8 Check impeller........................................................................................................ 74
12.9 Hub seal (option) replacement ............................................................................... 76
13 Removal from service, disposal, and recycling ................................................ 77
13.1 Safety instructions .................................................................................................. 77
13.2 Environmental protection........................................................................................ 77
13.3 Removal from service............................................................................................. 77

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6 / 88 Operating instructions CMVpro 125-400 ATEX | Version 1-en
13.4 Disposal instructions............................................................................................... 78
14 EU - Declaration of conformity............................................................................ 79
15 ATEX - Declaration of Conformity....................................................................... 80
15.1 ATEX test report ..................................................................................................... 82
Index ...................................................................................................................... 83

Operating instruction information | 1
Operating instructions CMVpro 125-400 ATEX | Version 1-en 7 / 88
1 Operating instruction information
Scope
These operating instructions provide qualified personnel with all essential safety
instructions, information, and guidance for working with CMVpro 125-400 ATEX
type centrifugal fans.
All phases of a centrifugal fan from transport, mounting, and placement in ser-
vice to repairs and disposal are covered.
Careful reading of and compliance with these operating instructions will help to
avoid injuries as well as environmental and material damage, ensure operational
safety and reliability of the centrifugal fan, and minimize downtime.
Storage location
The operating instructions and associated documents are to be stored near the
centrifugal fan such that they are easily accessible to qualified personnel at all
times.
The operating instructions and associated documents are also to be provided in
electronic form upon delivery of the fan. This gives the operator the ability to
print new operating instructions in the event that they go missing or to replace il-
legible or missing pages.
Design notes
For the sake of simplification, in these operating instructions,
• the company Colasit AG is referred to as the “manufacturer,”
• the CMVpro 125-400 ATEX centrifugal fan is referred to as the “fan,”
• “frequency converter” is abbreviated as “FC,”
• chapter and page number references appear as follows: _ Chap. 1 [}7]
The images in these operating instructions are for illustrative purposes and
could differ from the actual execution.
In the interest of our customers, we reserve the right to make changes as a re-
sult of technical developments.
Translation note
The German language version of this document is the original set of operating
instructions.
Inquiries
If possible, clarify any ambiguities in a given language version with the aid of the
original operating instructions. Ambiguities regarding the operating instructions
are to immediately be clarified with the manufacturer. Placement in service of or
other work on the fan is only permitted after successful clarification.
1.1 Further applicable documents
In addition to these operating instructions, the following documents and guid-
ance shall be available as associated documents for working on the fan:

1 | Operating instruction information
8 / 88 Operating instructions CMVpro 125-400 ATEX | Version 1-en
• Technical data sheet for the fan with complete technical data, including ap-
plication limitations.
• Order confirmation or the specification sheet for the conveyed medium with
information on the (limited) resistance of the fan to certain chemical sub-
stances. See also “Permissible conveyed media” _ Chap. 2.2.1 [}9].
The order confirmation also provides details regarding the full scope of delivery.
• Operating instructions for the electric motor.
• ATEX declaration of conformity for ATEX components: partly contained in
separate operating instructions.
• Operating instructions for devices or equipment that were installed or in-
cluded
(e.g. FC or isolation switch).
Additional document
• Manufacturer’s electromagnetic compatibility guideline, if the fan is intended
for operation with a frequency converter (FC).
1.2 Copyright
These operating instructions are protected by copyright.
© COLASIT AG. All rights reserved.
The use and distribution of the operating instructions is permitted in the context
of using the fan. Any other use is only permitted with the written consent of the
manufacturer.

Additional safety instructions | 2
Operating instructions CMVpro 125-400 ATEX | Version 1-en 9 / 88
2 Additional safety instructions
This chapter contains information relevant to safety and additional as well as
more in-depth safety instructions for operators and technical specialists.
Additional safety instructions
Depending on the execution of the fan, associated documents can contain addi-
tional operating instructions with important safety instructions.
2.1 Use and storage of the operating instructions
• Before beginning mounting procedures or working on the fan, read these
operating instructions carefully and completely.
• After use, always return the operating instructions to the marked storage lo-
cation near the fan.
2.2 Intended application of the fan
The fan is intended for conveying gaseous media in potentially explosive atmos-
pheres and is designed and manufactured in accordance with the state of the art
and the recognized technical safety regulations.
Nevertheless, the fan may pose a danger to life and limb of personnel or third
parties as well as material damage. Special care is therefore to be taken to en-
sure that the fan is in technically sound condition and that it is used as intended.
2.2.1 Intended use
The fan is intended exclusively for the application specified on the nameplate
and for installation in a complete system _ Chap. 4.2 [}25]. The fan may only
be transported, mounted, and operated by trained qualified personnel with ap-
propriate ATEX training/qualification _ Chap. 2.3 [}14].
Operating guidelines for potentially explosive atmospheres
The fan
• is suitable for conveyance of gases in zone 1 or 2 (equipment category 2
and 3), depending on the execution.
See fan nameplate _ Chap. 5.2 [}27] and ATEX Declaration of Conformity for
this _ Chap. 15 [}80].
Permissible conveyed media
In general, conveyance of dust-free air is permissible within the parameters
specified in the technical data sheet.
Conveyance of corrosive, hazardous, explosive, gaseous media is restricted as
follows:
1. The following apply to a conveyed medium that is specified in the fan's tech-
nical data sheet:
• The fan is suitable exclusively for conveyance of the specified medium.
• The service life of the fan could be limited if there is a corresponding
note in the order confirmation or the specification sheet.

2 | Additional safety instructions
10 / 88 Operating instructions CMVpro 125-400 ATEX | Version 1-en
2. The following apply to a conveyed medium that is specified as “undefined”
in the fan's technical data sheet:
• The fan is suitable for conveyance of corrosive, hazardous, explosive,
gaseous media that fall under the explosion protection marking of the
fan (explosion group, temperature class) and to which the plastics of
the fan and the sleeves are resistant.
• For independent assessment, the operator is to consult the pertinent
available resistance lists for plastics. The SIMCHEM guide is found on
the manufacturer's website (www.colasit.ch).
The impeller, inlet cover, and housing of the fan are marked with an abbreviation
for material identification (e.g. PPs-el for anti-static, electrically conductive plas-
tic made of polypropylene).
• The order confirmation or the additional specification sheet contains fur-
ther information and notes regarding a potential reduction in service life
of the fan.
3. The following apply if, according to the operator’s information, the conveyed
medium contains several chemical substances:
• The named importer or the manufacturer confirms the resistance of the
fan to these chemical substances in the order confirmation or the speci-
fication sheet, which is an associated document.
• The service life of the fan can be limited if there is a corresponding note
in the order confirmation or the specification sheet.
Permissible environmental conditions
1. The permissible operating and ambient temperature ranges are indicated on
the fan nameplate.
The minimum permissible operating temperature for the plastic parts of the
fan is -20 °C.
2. The following applies if this information is missing from the nameplate:
• Permissible ambient temperature range of the electric motor: See
nameplate of the electric motor or the operating instructions/declaration
of conformity of the motor manufacturer.
3. At operating temperatures below 4 °C, it is to be ensured by means of a
constant minimum flow rate that
• no condensate freezes in the fan or ductwork.
• no pieces of ice from the ductwork get into the fan.
Procedure for process changes
• The operator is to ensure upon a process change that
• the fan can withstand the zone or parameters changed or the new con-
veyed medium,
• the operating conditions according to the technical data sheet and
nameplate plate are adhered to.

Additional safety instructions | 2
Operating instructions CMVpro 125-400 ATEX | Version 1-en 11 / 88
Operating conditions
• The permissible operating conditions of the fan are defined by the parame-
ters and limit values on the technical data sheet or on the nameplate of the
fan and electric motor.
Note especially:
• Equipment category as well as ATEX certification of electric motor and ac-
cessories (FC, isolation switch, etc.) must be zone-compliant.
• The drive motor of the fan is designed for continuous operation (S1) or FC
operation (S9).
• Maximum speed, which is dependent on
• the temperature of the conveyed medium,
• chemicals present and their concentration in the air stream.
• Prevention of excessive self-heating:
• The operating point (see characteristic map on the technical data sheet)
shall be above the minimum permissible conveyed volume.
• So that no or minimal conveyed medium escapes from the impeller hub,
• operate the fan at a negative pressure,
• or use a hub seal.
• The fan must be equipped with vibration absorbers _ Chap. 7.4 [}38].
• Observe the permissible vibration limits according to standard values.
• The fan may not be mechanically stressed at the inlet and outlet connec-
tions.
• Decouple the ductwork from the fan via the sleeves
_ Chap. 7.8 [}41].
• When using a frequency converter,
• observe limit values for the acceleration time and braking time
_ Chap. 8.3 [}47],
• the electrical connection to the motor is to be EMC compliant, with ca-
ble shield and grounding _ Chap. 8.3.3 [}50].
• Series or parallel operation of fans is permitted only after clarification and
approval by the manufacturer or importer named in the operating instruc-
tions.
Intended use also includes compliance with all safety regulations and guidelines
in these operating instructions.
Maintenance and repair regulations
Adjustments and modifications to fans are strictly prohibited. Failure to comply
will void ATEX conformity of the fan.
Only trained, qualified, and authorized personnel may perform work on explo-
sion-proof fans.

2 | Additional safety instructions
12 / 88 Operating instructions CMVpro 125-400 ATEX | Version 1-en
2.2.2 Reasonably foreseeable misuse
Any use of the fan other than that for which it is intended or any other use is
considered misuse and can lead to dangerous situations. The manufacturer as-
sumes no responsibility for resulting injuries or material damage.
The following list of misuse is exemplary and not exhaustive.
• Conveyance of explosive dust.
• Operation in explosion protection zone 0 or in a zone that is not specified in
the explosion protection marking on the nameplate of the fan or in the tech-
nical data sheet.
• Operation of the fan outside the parameters and limit values specified in the
technical data sheet.
• Operation of the fan with prohibited conveyed media, such as solids and
dust.
• Operation of the fan in spite of strong vibration or with disturbances that cre-
ate an objectionable condition in terms of safety.
• Prohibited configurations of the frequency converter.
• Removal of components or tampering with components that ensure safe
and proper function of the fan (e.g. vibration absorbers, splinter protection,
sleeves, protective grid).
• Maintenance work conducted inappropriately, without ATEX training/qualifi-
cation.
• Use of non-original spare parts.
• Explosion protection testing of the fan and system incomplete or not con-
ducted.
• Unauthorized changes, modifications, or alterations to the fan.
• Any use of the fan that does not comply with the essential safety regulations
of these operating instructions.
• Operation without operating instructions and associated documents.
• Operation with illegible or missing warning signs.
2.2.3 Equipment limits
Spatial dimensions
The dimensions of the fan are specified in the technical data sheet.
Application limits
The operating temperature range and further operating conditions are specified
in the technical data sheet and on the nameplate.
Interfaces
The fan has the following interfaces:

Additional safety instructions | 2
Operating instructions CMVpro 125-400 ATEX | Version 1-en 13 / 88
4
1
5
2
3
1. Inlet connection (suction
side): Connection to supply
air ductwork with sleeve.
2. Outlet connection (pressure
side): Connection to dis-
charge air ductwork with
sleeve.
3. Terminal box on electric
motor.
4. Terminal for electrical sup-
ply for accessories and op-
tions (e.g. FC for electric
motor).
5. Casing drain (option) for
manual draining or connec-
tion to siphon.
Fig.1: Interfaces on fan
Service life
The fan is designed for an expected service life of 15 years.
The motor bearings of quality motors are designed for a service life of 40,000
hours when used as intended.
2.2.4 Residual risks
The fan is designed and manufactured in accordance with the state of the art
and the recognized technical safety regulations. Residual risks nevertheless re-
main. They are indicated by safety instructions in these operating instructions
and require the user to proceed with caution.
Explosive, hazardous, aggressive conveyed media
Residue and deposits of the conveyed medium can reside in the fan or flow in
from the ductwork.
• Qualified personnel responsible for maintenance and repair work shall
• have appropriate ATEX training/qualification,
• be trained in handling hazardous conveyed media,
• wear suitable personal protective equipment _ Chap. 3.2.1 [}19],
• coordinate with the operator when taking suitable protective and lock-
out measures.
When operating the fan in an overpressure condition, the conveyed medium can
escape at the impeller hub and lead to an explosion hazard and/or adverse
health effects.
• When used with explosive and/or hazardous conveyed media, the fan is to
be operated at a negative pressure or outfitted with the optional hub seal
_ Chap. 5.3.12 [}32].

2 | Additional safety instructions
14 / 88 Operating instructions CMVpro 125-400 ATEX | Version 1-en
2.3 Target groups and personnel requirements
These operating instructions are intended for:
• The operator of the system in which the fan is installed.
• The qualified personnel who carry out work on the fan during its various life
cycle phases, from installation to disposal.
The duties and personnel requirements for these target groups are described
next.
Requirements for staying and working in potentially explosive
atmospheres
• Appropriate ATEX training/qualification required.
• Wear special personal protective equipment _ Chap. 3.2.1 [}19].
• Only use certified non-sparking equipment and tools in the explosion protec-
tion area.
2.3.1 Operator
The operator is the person who operates the fan for commercial or economic
purposes or who allows a third party to use it and who assumes legal liability
during its operation.
The operator has the following duties:
For fan operation in potentially explosive atmospheres:
The classification and documentation of zones or definition of the equipment
category in the system/installation.
Operate the fan only in zones for which the fan is approved.
• Comply with the minimum safety and health protection regulations for the
use of work equipment and performance of activities on the fan.
• Keep current on national and local occupational safety and health regula-
tions.
• Prepare Safety Data Sheets when the conveyed medium contains explosive
and/or hazardous substances.
• Identify via risk assessment all additional dangers that arise due to special
working conditions at the fan installation location.
• Based on the risk assessment, derive, define, and implement for quali-
fied personnel the appropriate protective measures and operating in-
structions for safe maintenance and other activities.
• Adapt these operating instructions to current applicable standards and
regulations at the time of operation.
• Ensure that the fan is always in a technically sound condition under obser-
vance of the maintenance intervals per these operating instructions.
• Initiate and verify that the function and integrity of all fan safeguards are
checked regularly.
• Ensure that all manufacturer’s regulations are observed upon retrofitting of
safeguards.

Additional safety instructions | 2
Operating instructions CMVpro 125-400 ATEX | Version 1-en 15 / 88
• Determine the priority of shutting down the fan upon system malfunction or
in an emergency.
• Clearly determine and regulate the responsibility for installation, servicing,
maintenance, and repair of the fan.
• Ensure that the responsible qualified personnel
• have read and understood these operating instructions,
• have adequate occupational qualifications,
• are regularly trained in the dangers related to and measures to take
upon malfunction or in an emergency.
• Store these operating instructions and associated documents in their en-
tirety in legible condition in an identified location near the fan.
• Save and protect the electronic version of these operating instructions.
• Prepare the required protective equipment and direct the wearing of this
protective equipment by qualified personnel based on the operating and en-
vironmental conditions.
2.3.2 Transport personnel
The transport personnel are responsible for the transport of the fan to the instal-
lation location and for its removal for disposal at the end of its lifespan.
The transport personnel:
• Possess all necessary occupational knowledge, qualifications, and autho-
rizations for operating the necessary lifting and transport devices.
• Are trained in the proper application of lifting and load handling attach-
ments.
• Are knowledgeable of the safety and accident prevention guidelines and di-
rectives as well as recognized regulations of the technology applicable to
transport.
• Are authorized by the operator to perform transport operations.
2.3.3 Mounting personnel
Mounting personnel are responsible for the installation of the fan in the system
and for the subsequent placement in service. Removal of the fan for disposal
also falls in this area of responsibility.
• Mounting personnel consist exclusively of qualified technical specialists who
possess the necessary occupational experience, knowledge, and qualifica-
tions for mechanical and electrical work on the fan.
• The technical specialist is dependable when it comes to current safety and
accident prevention guidelines, directives, and recognized regulations of the
technology in their line of activity, and they are instructed by the operator.
• All work on the fan’s electrical components may only be carried out by elec-
tricians.
• The fan may only be connected to the frequency converter by an electrician
• after its operating instructions have been read and understood,
• including detailed knowledge of the respective frequency converter,

2 | Additional safety instructions
16 / 88 Operating instructions CMVpro 125-400 ATEX | Version 1-en
• and specialized knowledge of EMC-compliant wiring (consult the manu-
facturer’s EMC guideline).
• The fan manufacturer’s declaration of conformity is invalidated upon erro-
neous connection of the frequency converter and electric motor.
2.3.4 Operating personnel
The fan is generally used in automatic operations with a controller.
If operating personnel are necessary, the operator _ Chap. 2.3.1 [}14] of the
system is to determine the required education and qualifications for
• operating and outside cleaning of the fan _ Chap. 10 [}59].
• checking the operating condition of the fan _ Chap. 11.3 [}61].
2.3.5 Maintenance personnel
Maintenance personnel are responsible for the inspection, cleaning, mainte-
nance, and repair of the fan.
• The same requirements apply as for the mounting personnel
_ Chap. 2.3.3 [}15].
• An electrician is responsible for carrying out maintenance and repair work
and for switching off and safely disconnecting the power supply from the
fan.

Essential safety instructions | 3
Operating instructions CMVpro 125-400 ATEX | Version 1-en 17 / 88
3 Essential safety instructions
The associated documents can contain additional operating instructions with im-
portant safety instructions _ Chap. 1.1 [}7].
3.1 Notation of safety instructions
The safety instructions and warnings in these operating instructions are identi-
fied by the following warning symbols, signal words, and colors (electronic ver-
sion of the operating instructions only), which convey the severity of the dan-
gers.
Death or serious injuries
DANGER Danger to life due to... !
Outcome of the danger upon noncompliance...
▪ Conditions for prevention of the danger...
uMeasures for prevention of the danger...
This safety instruction, the highest danger level, denotes a direct and immediate
dangerous situation. This indicates a hazardous situation which, if not avoided,
will result in death or serious injury.
Serious injuries
WARNING Risk of injury due to... !
Outcome of the danger upon noncompliance...
▪ Conditions for prevention of the danger...
uMeasures for prevention of the danger...
A safety instruction of this danger level denotes a possible dangerous situation.
This indicates a hazardous situation which, if not avoided, could result in death
or serious injury with lasting effects.
Minor injuries
CAUTION Bodily injuries due to... !
Outcome of the danger upon noncompliance...
▪ Conditions for prevention of the danger...
uMeasures for prevention of the danger...
A safety instruction of this danger level denotes a possible dangerous situation.
This indicates a hazardous situation which, if not avoided, may result in minor or
moderate injury, possibly with lasting effects.
Material damage
NOTICE Material damage due to... !
Outcome of the danger upon noncompliance...
▪ Conditions for prevention of the danger...
uMeasures for prevention of the danger...
This warning instruction informs of a dangerous situation that can damage the
fan or or lead to other material damage.

3 | Essential safety instructions
18 / 88 Operating instructions CMVpro 125-400 ATEX | Version 1-en
3.2 Personal protective equipment
The personal protective equipment to be worn:
• is to be determined and made available by the operator based on the oper-
ating conditions and conveyed medium.
• is the personal responsibility of the qualified personnel to be worn as suit-
able for the work to be conducted and to be supplemented as necessary.
The manufacturer recommends personal protective equipment according to the
following table:
Symbol Meaning
Class 2 fluorescent warning vest with reflective stripes for improved
visibility during transport operations.
Close-fitting industrial safety clothing with low tear resistance for
protection against introduction into rotating machinery.
Hardhat to protect the head from falling objects, swinging loads,
and strikes from sharp, pointed machine parts.
Safety glasses to protect the eyes from airborne particles, parts,
and fluids. Protection from aggressive, hazardous conveyed media
or residues.
Hearing protection required at or above noise exposure levels of
85 dB(A) or 137 dB (CPeak).
Suitable breathing protection when in contact with aggressive, toxic
conveyed media or residues.
Work gloves for protection from injuries, burns, or contact with ag-
gressive, toxic residues of the conveyed medium.
Safety shoes for protection from crushing and from falling parts as
well as slips and falls on slick surfaces.

Essential safety instructions | 3
Operating instructions CMVpro 125-400 ATEX | Version 1-en 19 / 88
3.2.1 Personal protective equipment for potentially explosive environments
It must be ensured for maintenance work on the fan in a potentially explosive
environment that maintenance personnel are never dangerously electrostatically
charged.
The following apply when in a potentially explosive environment:
• Personal protective equipment may not be changed, put on, or taken off.
• Wear conductive protective equipment (protective clothing, hardhat, gloves,
and safety shoes).
• The conductive properties may not be diminished through washing.
• If potentially explosive areas are only entered temporarily, conductive
shoe or boot covers may also be used.
3.3 Mechanical hazards
DANGER Risk of injury due to
- rotating impeller,
- parts ejected with high force following impeller breakage,
- sharp corners or edges.
Serious injuries due to debris being launched out.
Crush, cut, strike, eye, or other injuries.
▪ Operation in a manner other than intended (e.g. regarding temperature,
speed, conveyed medium).
uOnly authorized qualified personnel may conduct work on the fan.
uPrior to beginning mounting, maintenance, and repair work: Use the isola-
tion switch to remove voltage on all phases.
uPrevent unauthorized start-up of the fan: Hang personal padlock and tag on
isolation switch.
uWear personal protective equipment.
uDo not leave any tools or mounting accessories in the fan.
uComply with all current accident prevention guidelines.
WARNING Risk of injury due to automatic start-up
Entry and crushing of appendages.
▪ The fan is to be operated in a system and controlled by automatic controls.
uPrior to beginning mounting, maintenance, and repair work: Use the isola-
tion switch to remove voltage on all phases.
uPrevent automatic start-up of the fan: Hang personal padlock and tag on
isolation switch.

3 | Essential safety instructions
20 / 88 Operating instructions CMVpro 125-400 ATEX | Version 1-en
3.4 Electrical hazards
DANGER Danger to life due to electric shock from contact with cur-
rent-carrying conductors or components under hazardous voltage.
Immediate danger to life due to respiratory and cardiac arrest.
▪ Only a qualified and authorized electrician may work on the power mains
and the electrical components of the fan.
uPrior to beginning mounting, maintenance, and repair work: Use the isola-
tion switch to remove voltage on all phases.
uPrevent unauthorized start-up of the fan: Hang personal padlock and tag on
isolation switch.
uEstablish an electrically safe work condition before beginning work.
uPromptly rectify any defects discovered in the electrical components and
wiring of the fan.
uEliminate moisture from current-carrying components to avoid a short cir-
cuit.
WARNING Risk of injury due to fire caused by short circuit
Burns, respiratory tract damage due to toxic fire smoke.
uProtect cables from mechanical, chemical, and thermal stresses.
uRegularly inspect the fan’s electrical components. Replace damaged com-
ponents and cables immediately.
uHave and periodically inspect suitable fire extinguishers. Observe the safety
instructions on the fire extinguisher.
3.4.1 Danger due to electromagnetic interferences
Observe the following safety and hazard instructions if the fan is used with a fre-
quency converter.
Frequency converters generate electromagnetic interference during operation
and can cause high-frequency leakage current in the electric motor, supply
power network, and grounding system.
CAUTION Interference from electromagnetic fields
Disturbance of sensitive electronic equipment by electromagnetic fields.
uWhen the fan is running, persons with pacemakers and other implanted
electronic devices must not remain in the immediate vicinity of the fre-
quency converter and electric motor.
NOTICE Disturbances to other devices from electromagnetic fields as
well as bearing damage to electric motor due to leakage current
Exceeding legally permissible emission limits.
Reduced lifespan of the motor bearing.
Possible system operating faults and production interruptions.
uUse of suitable interference suppression and shielding methods, such as a
mains suppression filter and shielded motor connection cable.
uEMC-compliant equipment design, especially for cable routing and shielding
connections. See EMC Guide of the manufacturer and/or third-party equip-
ment manufacturer.
uObserve FC manufacturer's recommendations for avoiding electromagnetic
interferences.