DÖRR EcoBell2 SL EC User manual

www.durr.com
EcoBell2 SL EC
Rotating Atomizer with External
Charging
Operating Manual
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ORIGINAL OPERATING MANUAL
Document No.: MRA00001EN
Version:: 07
As of:: 01/2020
Approved: 05.12.2014
Manufacturer
Dürr Systems AG
Application Technology
Carl-Benz-Str. 34
D-74321 Bietigheim-Bissingen
Germany
Tel: [phone]
Transmitting and duplication of this document as well as utilization and communication of its
contents are not allowed unless expressly granted. Offenders will be held liable for the payment
of damages. All rights reserved in the event of the grant of a patent, utility model or design.
=== Ende derL istefür Textmarke Copyright ===
.

Operating Manual
© Dürr Systems AG
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- Rotating Atomizer with External Charging
Document No.: MRA00001EN
Version:: 07 •As of:: 01/2020
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TABLE OF CONTENTS
1Introduction............................................................................................ 9
1.1 Information about the document .............................................................. 9
1.2 Symbols in the document......................................................................... 9
1.3 Intended use.......................................................................................... 10
1.4 Avoiding foreseeable misuses............................................................... 12
1.5 Material numbers................................................................................... 12
1.6 Device combination................................................................................ 12
1.6.1 Dürr components needed for the use of the atomizer as 2G device...............12
1.6.2 Dürr components needed for the use of the atomizer as 3G device...............12
1.6.3 Available device combinations ........................................................................13
1.6.3.1 EcoBell2 SL EC...............................................................................................13
1.6.3.2 EcoBell2 SL EC with “EcoAUC” control system .............................................13
1.6.3.3 Total system EcoRP 10 R1100.......................................................................13
2Safety.................................................................................................... 13
2.1 Danger zones......................................................................................... 14
2.2 Safety requirements............................................................................... 16
2.3 ATEX marking........................................................................................ 16
2.4 Residual risks......................................................................................... 18
2.4.1 Parameters ......................................................................................................18
2.4.2 Operation.........................................................................................................18
2.4.3 Maintenance and repair...................................................................................18
2.5 Conduct in the event of a hazardous situation....................................... 19
2.6 Responsibility of the operator................................................................. 19
2.7 Personnel Requirements ....................................................................... 21
2.7.1 Cleaning Staff ..................................................................................................21
2.7.2 Assembly personnel ........................................................................................21
2.7.3 Electrical personnel .........................................................................................22
2.7.4 Paint personnel................................................................................................22
2.8 Personal protective equipment............................................................... 22
2.9 Danger of damage to property............................................................... 25
2.10 Environmental protection....................................................................... 25
2.11 Emergency shutdown ............................................................................ 25
3Transport and storage......................................................................... 26
3.1 Delivery.................................................................................................. 26
3.2 Storage.................................................................................................. 26
3.2.1 Storage of electrode rings and atomizer body.................................................26
4Operating principle.............................................................................. 27
4.1 Brief description..................................................................................... 27

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4.2 Overview................................................................................................ 27
4.3 Functionality........................................................................................... 28
4.4 Assemblies............................................................................................. 30
4.4.1 Bell disk............................................................................................................30
4.4.2 Turbine.............................................................................................................32
4.4.2.1 Shaft detent .....................................................................................................33
4.4.2.2 Shaping air.......................................................................................................34
4.4.2.3 Rotational SpeedControl..................................................................................35
4.4.3 Valve block ......................................................................................................35
4.4.3.1 Main valve needle............................................................................................36
4.4.3.2 Valve for quick rinsing the bell disk .................................................................36
4.4.3.3 Recirculation for 1K paints...............................................................................37
4.4.4 Color tube ........................................................................................................37
4.4.5 Atomizer body and sleeve ...............................................................................38
4.4.5.1 The shaping air................................................................................................38
4.4.6 External charging.............................................................................................39
4.4.6.1 Function...........................................................................................................39
4.4.7 Clamping device (Jig)......................................................................................40
4.5 Connections........................................................................................... 41
4.5.1 Interfaces.........................................................................................................41
4.5.2 Flange assembly..............................................................................................42
4.5.2.1 Cable for potential equalization .......................................................................42
4.5.2.2 High voltage line ..............................................................................................43
4.6 Accessories and Related Parts.............................................................. 43
4.6.1 Accessories .....................................................................................................43
4.6.1.1 Case for checking high voltage shutdown.......................................................45
4.6.1.2 Atomizer attachment 60 ° (elbow) ...................................................................45
4.6.1.3 Atomizer pickup...............................................................................................45
4.6.1.4 Clamp for atomizer mount ...............................................................................45
4.6.1.5 Manual grounding rod......................................................................................45
4.6.1.6 Assembly bracket for atomizer ........................................................................45
4.6.1.7 Thread cleaner.................................................................................................45
4.6.1.8 Assembly aid for the atomizer body ................................................................46
4.6.1.9 Tool for disassembly of the atomizer body......................................................46
4.6.1.10 External mixer..................................................................................................46
4.6.1.11 Cable for potential equalization .......................................................................46
4.6.1.12 Tool set............................................................................................................46
4.6.2 Related Parts...................................................................................................46
4.6.2.1 High tension supply .........................................................................................46
4.6.2.2 R/O converter ..................................................................................................47
4.7 Tools...................................................................................................... 47
4.7.1 Tool kit .............................................................................................................47
4.7.2 Functionality of tools........................................................................................51

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4.7.3 Use of tools in Ex zones..................................................................................51
4.7.3.1 Area of applicability..........................................................................................52
4.7.3.2 Restricted use of tools in Ex zones .................................................................52
5Installation and assembly ................................................................... 54
5.1 Installation illustration............................................................................. 54
5.2 Assembly ............................................................................................... 54
5.2.1 Requirements for the installation point ............................................................55
5.2.2 Prerequisites for installation.............................................................................55
5.2.3 Flange assembly..............................................................................................55
5.2.3.1 Assemble the atomizer....................................................................................55
5.2.3.2 Cable and hose routing....................................................................................57
5.2.4 Fasten electrode ring.......................................................................................59
5.2.5 Attach the atomizer to the flange package......................................................63
5.2.6 Attaching the bell disk......................................................................................64
5.2.7 Attach type plate..............................................................................................65
5.2.8 Final checks.....................................................................................................65
5.2.8.1 Atomizer...........................................................................................................65
5.2.8.2 Pneumatic supply ............................................................................................66
5.2.8.3 Media Lines .....................................................................................................66
6Operation.............................................................................................. 67
6.1 Safety notes for operation...................................................................... 67
6.1.1 Danger due to explosive atmosphere..............................................................67
6.1.2 Danger due to high voltage .............................................................................67
6.1.3 Material may leak uncontrollably at high speed. .............................................67
6.1.4 Danger due to harmful or irritant materials......................................................68
6.1.5 Danger due to rotating bell disk.......................................................................68
6.2 General Notes on Operation.................................................................. 68
6.2.1 Valves..............................................................................................................69
6.2.2 Noises..............................................................................................................69
6.2.3 Vibrations.........................................................................................................69
6.2.4 Cleanliness ......................................................................................................69
6.2.5 Hoses...............................................................................................................69
6.2.6 Grounding and High Voltage ...........................................................................69
6.2.7 Spray Pattern...................................................................................................70
6.3 Operating Parameters............................................................................ 70
6.3.1 Painting data....................................................................................................71
6.3.2 High voltage.....................................................................................................72
6.3.3 Compressed air ...............................................................................................73
6.4 Starting Operations................................................................................ 73
6.4.1 Commissioning notes ......................................................................................73
6.4.2 Commissioning................................................................................................75

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6.4.3 Testing the paint flow control (volumetric measurement)................................75
6.5 Purging .................................................................................................. 78
6.5.1 Purging sequence............................................................................................78
6.5.2 Detergent.........................................................................................................78
6.6 Checks during operation........................................................................ 79
7Cleaning and maintenance.................................................................. 80
7.1 Safety Instructions ................................................................................. 80
7.1.1 Cleaning...........................................................................................................81
7.1.2 Servicing and maintenance .............................................................................82
7.2 Cleaning agents..................................................................................... 83
7.2.1 Recommended cleaning agents......................................................................84
7.3 Cleaning and maintenance plan............................................................. 85
7.4 Cleaning................................................................................................. 87
7.4.1 Cleaning procedure A......................................................................................88
7.4.1.1 Pre-cleaning with non-flammable detergent....................................................88
7.4.1.2 Main cleaning with n-propanol or iso-propanol................................................88
7.4.1.3 Drying the atomizer..........................................................................................88
7.4.2 Cleaning procedure B......................................................................................88
7.4.2.1 Cleaning with non-flammable detergent..........................................................88
7.4.2.2 Drying the atomizer..........................................................................................88
7.4.3 Scope of cleaning............................................................................................89
7.4.3.1 Atomizer body..................................................................................................90
7.4.3.2 Shaping air ring................................................................................................90
7.4.3.3 Electrode fingers..............................................................................................91
7.4.3.4 Bell disk............................................................................................................92
7.4.3.5 Drying the atomizer..........................................................................................93
7.4.3.6 Final work ........................................................................................................93
7.5 Maintenance work.................................................................................. 94
7.5.1 Assembling the bell disk..................................................................................95
7.5.1.1 Unscrewing the bell disk from the shaft...........................................................95
7.5.1.2 Checking the distributor disk ...........................................................................96
7.5.1.3 Screwing the bell disk onto the shaft...............................................................99
7.5.1.4 Final check.....................................................................................................102
7.5.2 Installing and dismantling the nozzle.............................................................102
7.5.2.1 Dismantling the nozzle...................................................................................102
7.5.2.2 Installing the nozzle .......................................................................................103
7.5.3 Replacing the electrodes...............................................................................103
7.5.3.1 Removing the electrodes...............................................................................104
7.5.3.2 Installing the electrodes.................................................................................104
7.5.4 Dismounting and mounting atomizer body....................................................104
7.5.4.1 Dismantling the atomizer body ......................................................................104
7.5.4.2 Install atomizer housing.................................................................................106

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7.5.5 Cleaning the shaping air ring.........................................................................108
7.5.6 Replacing the contact ring.............................................................................109
7.5.6.1 Dismantling the contact ring ..........................................................................109
7.5.6.2 Installing the contact ring...............................................................................109
7.6 Final work after maintenance activity................................................... 110
8Faults .................................................................................................. 111
8.1 Safety provisions.................................................................................. 111
8.2 Fault Indicator...................................................................................... 112
8.3 Behavior during faults.......................................................................... 113
8.4 Troubleshooting................................................................................... 113
9.1 Mounting the valve block ..................................................................... 117
9.1.1 Dismantling the valve block...........................................................................117
9.1.2 Mounting the valve block...............................................................................118
9.2 Mounting the turbine............................................................................ 119
9.2.1 Dismantling the turbine..................................................................................119
9.2.2 Installation of the turbine................................................................................120
9.2.3 Checking the position of the nozzle...............................................................121
9.3 Installation of the light conductor.......................................................... 122
9.3.1 Removing the light conductor........................................................................122
9.3.2 Cleaning the light conductor..........................................................................124
9.3.3 Testing the light conductor.............................................................................124
9.3.4 Installing the light conductor..........................................................................124
9.4 Mounting of the shaft detent................................................................. 124
9.4.1 Dismantling of the shaft detent......................................................................125
9.4.2 Installation of the shaft detent........................................................................125
9.5 Installing the main needle valve........................................................... 126
9.5.1 Removing the main needle valve ..................................................................126
9.5.2 Installing the main needle valve ....................................................................127
9.6 Working on paint pipe.......................................................................... 128
9.6.1 Removing paint pipe......................................................................................128
9.6.2 Checks on removed paint pipe......................................................................128
9.6.3 Disassembling the paint pipe.........................................................................128
9.6.4 Assembling the paint pipe..............................................................................129
9.6.4.1 Paint tube with recirculation...........................................................................129
9.6.4.2 Paint tube with recirculation...........................................................................130
9.6.5 Mounting the paint pipe .................................................................................134
9.7 Assemble valve.................................................................................... 135
9.7.1 Removing the valve.......................................................................................135
9.7.2 Assembling valve...........................................................................................136
9.8 Replacing the hose at the flange assembly ......................................... 137
9.9 Resistance test .................................................................................... 138
9.10 Final work after fault removal............................................................... 138

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10 Dismantling and Disposal................................................................. 139
10.1 Switching off the atomizer.................................................................... 139
10.2 Separating the atomizer from the flange package................................ 140
10.3 Dismantling of the atomizer.................................................................. 140
10.4 Disposal of the atomizer ...................................................................... 141
11 Technical Data.................................................................................... 142
11.1 Replacement parts............................................................................... 144
11.1.1 Ordering.........................................................................................................144
11.1.2 Replacement parts list...................................................................................144
12 Contacts and Hotline......................................................................... 152
13 Appendix ............................................................................................ 152
13.1 Check list for commissioning - External charging G500....................... 152

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Introduction
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1 Introduction
1.1 Information about the document
This instruction manual contains the necessary information for the
safe operation, maintenance and repair of the product.
Please keep this manual handy at all times at the place of activity of
the product for the staff. When passing on the product to a third party
this instructional manual must also be handed over.
Activities described in this operation/instruction manual must be
performed only by qualified staff.
Activities which have not been described in this instruction manual
must be performed only by the manufacturer.
Every person who uses this product must have read and understood
these operating instructions.
Dürr Systems disclaims all liability for damages arising from the fact
that the instructions were not followed!
For further questions please contact our service- or replacement
department or the representative of Dürr Systems (refer to chapter 11
"Contacts & Hotline").
Technical changes that cause variations of the specifications and
illustrations in this instruction manual are subject to
modification.
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1.2 Symbols in the document
Potential risks are pointed out in the document with the help of
symbols and signal words.
D A N G E R
Risk of fatal injuries
The safety phrase "Danger" marked in red represents a high risk the
consequence of which could be either death or serious injury.

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Introduction
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W A R N I N G
Risk of serious injuries
The safety phrase "Warning" marked in orange represents a medium
risk the consequence of which could be either death or serious injury.
C A U T I O N
Risk of minor injuries
The safety phrase "Caution" marked in yellow represents a low risk
the consequence of which could be either minor or moderate injury.
A T T E N T I O N
Risk of damage to property and production disruption
The safety phrase "Attention" marked in blue represents a risk the
consequence of which could be either damage to property and or an
interruption in production.
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1.3 Intended use
During electrostatic coating, the rotating atomizer, “atomizer” in short,
allows atomization of a fluid coating material into droplets by
mechanical forces. High voltage up to 100 kV generates an
electrostatic field. The electrostatic field charges the paint droplets. A
grounded work piece attracts the charged droplets. Air flows support
the process. A tapering spray cloud condenses on the work piece.
The EcoBell2 SL EC atomizer with external charging may only be
operated with proven non-flammable fluid coating materials. The
associated approved and permitted detergents and cleaning agents
must also be non-flammable:
- Water based 1K paint (single component paint)
(corresponding to EN 50348 Appendix A a)
- Pre-mixed water based 2K paint (two-component paint)
(corresponding to EN 50348 Appendix A a)
The atomizer is intended for use in industrial application stations
within a painting booth (also spray booths). Application stations and
painting booths are subject to local, national and international
specifications for machine safety and explosion protection.

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If the atomizer is integrated in a total system, all technique-specific
and safety standards as well as the valid specifications must be
fulfilled.
Follow the following European standard in respect of coating materials
and application process for the atomizer with external charging:
- EN 50348 Stationary electrostatic application equipment for non-
flammable liquid coating material - Safety requirements
The atomizer is classified for all process variants as atomizer of the
type A-NL according to this standard.
If you have questions regarding the application range, our Service
Department is at your disposal.
Restrictions for Atomizers with Recirculation:
In atomizers with recirculation, work only with slow-drying 2K paints.
Do not use isocyanate based and epoxy resin based hardeners.
According to the ATEX Guideline, the atomizer type tested as device
of the category 2G and for is approved for use in explosive areas of
Ex zones 1 and 2. This permission is valid according to the type test
certificate and the details on the type plate exclusively in combination
with the assigned and in the declaration of conformity in accordance
with the ATEX Guideline listed products from Dürr Systems:
- High voltage generator
- Controller
- Wiring board
If the atomizer is operated with products from another manufacturer,
only a device of the category 3G and in Ex-zone 2 can be used.
Independently of the painting parameters, the deployment of the
atomizer is only allowed according to the technical data, for example,
within the specified temperature range and the specified relative
humidity.
A deployment under any conditions other than those mentioned in the
operation manual is not allowed.
Technical data and limits of use to be observed are included in these
operation manual and in the drawings, schemata and parts lists
associate with this product.
Failure to use the atomizer as intended is potentially very dangerous.
The specifications and notes in these instructions must be absolutely
followed for its intended use.
The atomizer and its attachments are free of LABS.

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EcoBell2 SL EC
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Introduction
Document No.: MRA00001EN
Version:: 07 •As of:: 01/2020
1.4 Avoiding foreseeable misuses
- Do not use flammable fluid coating materials and detergents.
- Do not point the atomizer towards people.
- Do not spray into the eyes.
- Do not reach into spray jet.
- Do not inhale atomized coating materials.
- Never operate the atomizer outside the spray booth.
- Never override or deactivate any safety devices.
The atomizer can be dangerous if it is not operated according to this
operation manual.
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1.5 Material numbers
The document is valid for the product:
Rotating Atomizer with External Charging EcoBell2 SL EC
N34150001
without recirculation
N34150003
without recirculation
N34150005
with recirculation
1.6 Device combination
1.6.1 Dürr components needed for the use of the atomizer as 2G device
- Generator
- Controller
- Wiring board
- R/O converter
- Flange package
- Bell disk
- High voltage line with plug
1.6.2 Dürr components needed for the use of the atomizer as 3G device
- Flange package
- Bell disk
- High voltage line with plug

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Recommended components
- Generator
- Controller
- Wiring board
- R/O converter
The optical electrical converter (R/O converter) used for sensing
speed must conform to the “optical radiation (op)” ignition protection
category according to EN 60079-28 or IEC 60079-28.
1.6.3 Available device combinations
- EcoBell2 SL EC
- EcoBell2 SL EC with “EcoAUC” control system
- Total system with EcoRP 10 R1100
1.6.3.1 EcoBell2 SL EC
The EcoBell2 SL EC includes the atomizer and the necessary
components. The atomizer must be integrated in a painting system
according to the technical data and the intended use. The conditions
for type testing are not fulfilled.
1.6.3.2 EcoBell2 SL EC with “EcoAUC” control system
The “EcoAUC” control system with integrated high voltage supply
controls and monitors the EcoBell2 SL EC. If this combination is
integrated in a painting system according to the technical data and the
intended use, the conditions of type testing are fulfilled.
1.6.3.3 Total system EcoRP 10 R1100
The total system comprises the following components:
- EcoBell2 SL EC
- Robot EcoRP 10 R1100
- AUC control cabinet with integrated high voltage supply for the
atomizer
- Robot control
The total system EcoRP 10 R1100 fulfills the conditions for type
testing with regard to the atomizer.
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2 Safety

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Safety
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The handling and use of the product requires specialized knowledge
for the safe operation of the application stations for electrostatic
coating. Safe handling of the media used is necessarily part of the
expert knowledge.
When handling the media, always follow the instructions of the
manufacturer.
Personnel must be trained in the operation, maintenance, and repair
of the product.
If you need assistance in the training of operators, please contact our
training department (see chapter "Contacts & Hotline").
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2.1 Danger zones
A minimum distance must be maintained between grounded parts and
high voltage parts.
C A U T I O N
Danger from explosive atmospheres
Electric flashovers with spark generation
The distance between the spray system parts under high voltage parts
must be so large that there will not be any electrical flashover during
normal operation.
A minimum distance of 400 mm must be maintained from the tips of
the electrode needles.
This minimum distance does not apply to the distance between the
atomizer and work piece (painting distance) or for design distances of
the atomizer.

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Safety
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Fig. 1: Minimum distance from grounded parts
W A R N I N G
Danger from explosive atmospheres
Sparking can cause an explosion.
Before entering the booth, and the use of ground rod no explosive
atmosphere may be present in the booth.
Before working with the atomizer, it must be brushed against the
grounding rod and discharged.
W A R N I N G
Danger due to High Voltage
Danger of electric shock and discharges
Touch the atomizer with an grounding rod and discharge it before
touching the atomizer.
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2.2 Safety requirements
Rotational speed
The rotational speed of the atomizer must be monitored. This is
achieved via an optical cable and processing of the signals in the
control unit. The optical signals of the turbines must be recorded in an
O/E converter and conducted to a speed controller. The control
enables a speed controller to regulate the speed of the turbine and
ensures that the speed is limited to the maximum value stored in the
control.
High voltage
The high tension must be monitored. When the high voltage is
switched off, the supply of the coating material is also interrupted.
Constraints for the high tension are given in the technical data of the
atomizer.
The safety requirements for rotational speed and high tension are
taken into consideration and implemented in the devices combinations
with EcoAUC and for the total system EcoRP 10 R1100.
For the individual product EcoBell2 SL, the integrator or operator is
responsible for the implementation.
Fire safety
The operator must include the atomizer is his onsite security and fire
protection concept. This includes operation in a closed coating booth
with technical ventilation. Forced ventilation must be locked with the
high voltage in such a way that the high voltage cannot be turned on
when the ventilation system is not working.
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2.3 ATEX marking
The type plate is not located on the atomizer due to its design. It
should be located near the atomizer, e.g. on the booth wall.
The type plate shows the following details:
- Type designation
- Material number
- Year of manufacture
- Serial number
- Permitted device combination
- EX labelling

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Safety
Document No.: MRA00001EN
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- Certification number
- Discharge energy
- Maximum output current
- Maximum output voltage
- Input voltage
- Input frequency
- Power consumption
- Maximum surface temperature
- Maximum control air pressure
- Maximum material pressure
- CE labeling
- Manufacturer’s data
- QR Code
The atomizer fulfills the following requirements according to the ATEX
guideline:
Device group Device category Temperature
class Discharge energy
II 2G T4 <350mJ
II 3G T4 <350mJ
The atomizer may be operated in the zone 1 and 2. For this purpose,
the operating parameters given on the type plate should be noted.
The atomizer is not suitable for operation in zone 0.
The use of atomizers as device of the category “2G” is permitted
exclusively in combination with the following Dürr Systems products:
- High voltage generator
- Controller
- Wiring board
- R/O converter
- Flange package
- Bell disk
- High voltage line with plug
If the atomizer is operated with components from other manufacturers,
the only use allowed is as a device of the “3G” category.
Special conditions for operation
The atomizer is to be operated in the “I-constant” operating mode in
the entire setting range as equipment of type A-NL with a discharging
power <350mJ.
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2.4 Residual risks
2.4.1 Parameters
All application parameters (for example: time programs, high voltage
settings, and others) may only be changed by specially trained
personnel. There must be safety measuresthat allow only authorized
personnel to change the application parameters.
Changes to parameters can lead to injury or malfunctions/operation
halt. Therefore, a sound knowledge of the parameters is required.
After adjusting application parameters, all affected features need to be
examined before re-starting operation (test run).
2.4.2 Operation
A bell disk coming loose from the turbine shaft can pose a risk of
injury.
Please note the dangers of the high voltage when the atomizer is
powered by static electricity.
2.4.3 Maintenance and repair
Discharge energy at system components
Discharge energy at system components may interfere with medical
implants, such as cardiac pacemakers. It can cause serious injuries or
death.
Prohibition of entry for persons with cardiac
pacemakers or implanted defibrillators
Risk of injury present during assembly work due to:
- Rotary bell disks
- Material squirting out during disassembly of the atomizer and
volumetric measurement.
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Operating Manual
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EcoBell2 SL EC
- Rotating Atomizer with External Charging
Safety
Document No.: MRA00001EN
Version:: 07 •As of:: 01/2020
19 / 156
2.5 Conduct in the event of a hazardous situation
The behavior in the event of a hazardous situation is dependent on
assembly at the operator.
Basically:
- Shut down the power supply.
- Close the pipe work and release the pressure.
- Discharge the residual energy. (Use the earthing rod).
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2.6 Responsibility of the operator
The atomizer is part of an electrostatic spray system of a stationary
spray unit for coating with non-flammable liquid coating materials,
which do not generate an explosive atmosphere within the spray
range. When designing, planning, constructing, erecting, setting up
and operating such a spray unit, EN 50348 must be noted and
adhered to.
The following points are particularly important:
- Integration in the on-site fire protection concept
- Integration in the on-site security concept:
- Emergency stop
- Safe switching off the high voltage
- Discharge of residual energies.
- Handling paint, detergents and cleaning agents
- Constant pressure - pressure monitoring.
If the atomizer is operated as a category “2G” device, it must be
ensured that during operation, the high voltage is switched off before
the first discharge. The shutdown function must be adjusted and
tested prior to commissioning. Furthermore, the shutdown function
must be tested every 12 months.
The procedure is described in the standard EN 50176.
In the chapter “Optional accessories” of this manual you will find a
case that contains the necessary equipment for testing the shutdown.
Fire protection
The painting booth must have a fire protection system. In the event of
fire, the fire protection system shall be activated automatically and
without delay. High voltage supply and supply of paint and detergent
and compressed air must be turned off automatically.

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EcoBell2 SL EC
- Rotating Atomizer with External Charging
Safety
Document No.: MRA00001EN
Version:: 07 •As of:: 01/2020
Grounding/ Potential equalization
All conductive parts of the plant such as floors, walls, ceilings, fencing,
transport equipment, work pieces, coating tank, robots, or structural
parts in the spray area, with the exception of operationally high
voltage live parts must be connected to the grounding system. Parts
of the booth must be grounded in accordance with EN 16985.
If sufficient grounding of the work piece cannot be ensured, the
electric charges on the work piece may be bled off by other means,
e.g. ionizers. Such devices may not exceed the allowable discharge
energy of the spray systems with which they are used. Furthermore,
these devices must be subjected to the same tests regarding the
allowable discharge energy like the atomizer systems used with them.
The discharging device must be locked to the spraying system so that
the high voltage is switched off and the coating cannot take place
when the discharging device has a malfunction.
Grounded, conductive workpieces
Paint create an electrically isolating layer on a grounded workpiece.
When painting on top of dried paint layers (especially on clear coat)
highly charged surfaces can occur. This effect is even stronger with
detail painting. On those surfaces propagating brush discharges might
occur. Such discharges can be an ignition source in the painting
booth.
You have the following option to prevent propagating brush
discharges:
- Discharge the surfaces
It is possible to discharge the electric charge on the workpiece with
ionizers. Specific notes listed in the standard must be observed.
- Keep the atomizer at a good distance from the workpiece.
Because even at a reduced high voltage propagated brush
discharges at the work piece cannot be ruled out, this procedure
may only be followed when using non-flammable coating materials.
- Work pieces that have been coated before may not be coated
using high voltage again.
High voltage may only be used on coated workpieces with a paint
layer breakdown voltage lower than 4kV. On most work pieces with
a clear coat the breakdown voltage is higher.
Accessories
The operator must ensure that this manual is always available
wherever the atomizer is present.
The local standards and regulations for occupational safety and
accident prevention should be observed at all times.
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