DURAG D-LX 200 User manual

D−LX 200
D−LX 720
Compact Flame Monitor
Before starting any work, please read the Operating instructions!
GmbH · Kollaustraße 105 · 22453 Hamburg · www.durag.de
Artikelnr.:
1 119 619
Translation of the original Operating instructions

Translation of the Original-Operating instructions Compact Flame Monitor D−LX 200, D−LX 720
Document:
mnx_dlx200_720_en.docx
Previous version
06.06.2016
Version:
09.08.2017
last update:
09.08.2017
Print date:
09.08.2017
Item number.: 1 119 619
European
inspection base:
EN 298 (2003)
EN 230 (2005)
Fuel / Device:
Gas
Öl
Register number:
Inspected by TÜV Süddeutschland
Approved for intermittent operation, continuous operation and 72-hour operation. Registered by DVGW
DURAG GmbH
Kollaustraße 105
22453 Hamburg
Telephone: [phone] – 0
Fax : [phone]
E-Mail: [email protected]
Internet: www.durag.de
This documentation
 (approx. 160 pages) was compiled with the greatest care;
 is not intended for the US market. Documentation to ANSI Z535 is available on request. Order
addresses can be found on page 159;
 or parts thereof may not be reproduced or distributed without express permission from DURAG
GmbH, irrespective of how this is done, in what language or by what medium, electronic or
mechanical;
 always relates to the complete device, even if individual program modules or parts have not
been purchased;
 relates to the current design of the device at the time of update of this documentation (see
above);
 is subject to changes to its content without notification;
 contains figures which may differ due to further technical developments or to the manageable
scale of their actual appearance. No claims regarding the supply of identical products can
therefore be derived from the illustrations shown.

Contents
D−LX 200, D−LX 720 3
Contents
1General 9
1.1 Information on Operating instructions .......................................................................................... 9
1.2 Explanation of Symbols .............................................................................................................. 10
1.3 Limitation of liability .................................................................................................................... 12
1.4 Information regarding warranty .................................................................................................. 12
1.5 Spare parts ................................................................................................................................. 12
1.6 Customer service ....................................................................................................................... 13
1.7 Copyright .................................................................................................................................... 13
1.8 Trademarks ................................................................................................................................ 13
2Safety instructions 17
2.1 General safety instructions ......................................................................................................... 17
2.2 Hazards due to electrical equipment .......................................................................................... 18
2.3 Hazard due to hot, aggressive or explosive gases .................................................................... 18
2.4 Hazard to the device due to purge air failure ............................................................................. 19
2.5 Designated use .......................................................................................................................... 19
2.6 Avoidance of consequential damage in the event of a system fault .......................................... 19
2.7 Qualified personnel .................................................................................................................... 20
3Explosion protection 23
3.1 Basics ......................................................................................................................................... 23
3.2 Classification of the equipment groups into categories ............................................................. 24
3.3 Equipment with pressure proof encapsulation „Ex d“ ................................................................ 25
3.4 Ignition protection category "Ex n_" (Gas) ................................................................................ 26
3.5 Protection through housing “Ex t“ (dust) ................................................................................... 27
3.6 ATEX Markings .......................................................................................................................... 27
3.7 FM Markings............................................................................................................................... 29
3.8 Safety with Ex-equipment .......................................................................................................... 31
3.9 Meaning of Ex-specifications on the Ex-type labels................................................................... 31
4Functional safety 35
4.1 Relevant Standard ..................................................................................................................... 35
4.2 Functions of the flame monitor ................................................................................................... 35
4.3 Generally valid parameters of the flame monitor ....................................................................... 36
4.4 Low and high demand mode of operation .................................................................................. 36
4.5 Low demand mode ..................................................................................................................... 36
4.6 High demand mode .................................................................................................................... 39
5Product description 43
5.1 Instructions for delivery .............................................................................................................. 43
5.2 Items delivered / Version variants .............................................................................................. 43
5.3 Accessories ................................................................................................................................ 45
5.4 Instructions about the product .................................................................................................... 48
5.5 Designated Use, Applications .................................................................................................... 48
5.6 Selection criteria for Compact Flame Monitor D−LX 200, D−LX 720 ........................................ 49
5.7 Conformity .................................................................................................................................. 50
5.8 Identification of the product ........................................................................................................ 50
5.9 Type code ................................................................................................................................... 52
5.10 Information regarding warranty .................................................................................................. 54
6Layout and function 57
6.1 Functional description ................................................................................................................ 57
6.2 Device description ...................................................................................................................... 60
7Installation, commissioning 69
7.1 Safety ......................................................................................................................................... 69

Contents
4 D−LX 200, D−LX 720
7.2 Transportation ........................................................................................................................... 70
7.3 Installation ................................................................................................................................. 70
7.4 Opening the Ex-device housing ................................................................................................ 72
7.5 Closing the Ex-housing hood .................................................................................................... 74
7.6 Electrical connection ................................................................................................................. 76
7.7 Installation, purge air supply ...................................................................................................... 80
7.8 Commissioning .......................................................................................................................... 82
7.9 Dismantling and disposal of the D−LX 200 ............................................................................... 83
8Adjusting the flame monitor 87
8.1 Range selection ......................................................................................................................... 88
8.2 Adjusting the thresholds ............................................................................................................ 89
8.3 Setting the amplification characteristics curve .......................................................................... 91
8.4 Setting the Modbus address ...................................................................................................... 93
8.5 Setting procedure ...................................................................................................................... 94
8.6 Safety time ................................................................................................................................. 99
8.7 Modbus .................................................................................................................................... 100
9Maintenance 107
9.1 Customer Service Information ................................................................................................. 107
9.2 Safety ...................................................................................................................................... 107
9.3 Maintenance intervals ............................................................................................................. 108
9.4 Maintenance work ................................................................................................................... 108
9.5 Fault ......................................................................................................................................... 109
10 Appendix: Technical data 113
10.1 Technical data for the basic device ......................................................................................... 113
10.2 Technical data for versions for hazardous areas .................................................................... 114
10.3 Technical data of the sighting tube connection, purge air connection .................................... 115
10.4 Factory Settings (Default) ........................................................................................................ 115
10.5 Technical data of the integrated flame sensor ........................................................................ 115
10.6 Pre-settings ............................................................................................................................. 115
11 Appendix: Plans and drawings D−LX 200, D−LX 720 116
11.1 Wiring diagram D−LX 200, D−LX 720 .................................................................................... 116
11.2 Wiring diagram D−LX 200… /MP3, D−LX 720… /MP3 ........................................................... 117
11.3 Dimensional drawings ............................................................................................................. 118
12 Appendix: Declaration of Conformity 122
13 Appendix: Certificates 125
14 Appendix: Glossary 130
15 Appendix: Index 133
16 Appendix II: D−LX 200 InformationCentre PC-Version 139
16.1 System requirements .............................................................................................................. 139
16.2 Installation ............................................................................................................................... 139
16.3 Start ......................................................................................................................................... 139
16.4 Drop-down menus ................................................................................................................... 145
16.5 Fault messages ....................................................................................................................... 149
16.6 Structure of the stored data sets ............................................................................................. 149
17 Appendix II: Modbus 153
17.1 General information ................................................................................................................. 153
17.2 DURAG Modbus DataMap ...................................................................................................... 155
18 DURAG GROUP company addresses 159

Contents
D−LX 200, D−LX 720 5
Index of illustrations
Figure 3.1: Ex-type label Compact Flame Monitor D−LX 200 ............................................................. 31
Figure 5.1: Type label D−LX 200, D−LX 720 ...................................................................................... 50
Figure 5.2: Explanation of terms on the type label D−LX 200, D−LX 720 .......................................... 51
Figure 5.3: Type label D−LX 200 Ex, D−LX 720 Ex ........................................................................... 52
Figure 6.1: System overview D−LX 200 .............................................................................................. 57
Figure 6.2: System overview D−LX 720 ............................................................................................. 57
Figure 6.3: Functional diagram ............................................................................................................ 58
Figure 6.4: D−LX 200… and D−LX 200…/MP .................................................................................... 60
Figure 6.5: D−LX 200 Ex… ................................................................................................................. 61
Figure 6.6: Exploded drawing D−LX 200 ........................................................................................... 62
Figure 6.7: Exploded drawing D−LX 720 ............................................................................................ 63
Figure 6.8: Exploded drawing D−LX 200 Ex ....................................................................................... 64
Figure 7.1: Safety screw ...................................................................................................................... 70
Figure 7.2: Dimensional drawing of swivel mount (optional for D−LX 200) D-ZS 033-I) .................... 71
Figure 7.3: Safety screw ...................................................................................................................... 72
Figure 7.4: Release the housing hood ................................................................................................ 72
Figure 7.5: Remove the housing hood ................................................................................................ 73
Figure 7.6: Do not tilt the housing hood when removing ..................................................................... 73
Figure 7.7: When pulling the housing hood, do not slip it onto the circuit boards. .............................. 74
Figure 7.8: Do not tilt the housing hood when pushing ....................................................................... 74
Figure 7.9: Move the housing hood along the longitudinal axis when pushing ................................... 75
Figure 7.10: Move the housing hood along the longitudinal axis when pushing ................................... 75
Figure 7.11: Correctly closed housing ................................................................................................... 76
Figure 7.12: Position of fuses ................................................................................................................ 77
Figure 7.13: Wiring diagram D−LX 200, D−LX 720 ............................................................................... 78
Figure 7.14: Wiring diagram D−LX 200… /MP3, D−LX 720… /MP3 .................................................... 79
Figure 7.15: Elimination of the potential separation .............................................................................. 80
Figure 7.16: Purge air flow through the sighting tube in dependence of the diferential pressure ......... 81
Figure 7.17: Purge air connection ......................................................................................................... 82
Figure 8.1: Printed circuit board numbering ........................................................................................ 88
Figure 8.2: Front panel D−LX 200 ....................................................................................................... 90
Figure 8.3: Intensity setting ................................................................................................................. 90
Figure 8.4: Setting the flicker frequency [Hz] of the flame .................................................................. 91
Figure 8.5: Gain characteristic curves ................................................................................................. 92
Figure 8.6: Circuit board no. 2 (→) DIP switch S3 and S4 .................................................................. 92
Figure 8.7: Flow chart for adjustment by means of analogue output/LED .......................................... 96
Figure 8.8: Flow chart for adjustment using InformationCentre .......................................................... 98
Figure 8.9: Circuit board no. 4, jumper X2” ....................................................................................... 101
Figure 8.10: Circuit board no. 2, (→) DIP switch S5 ........................................................................... 102
Figure 11.1: Wiring diagram D−LX 200, D−LX 720 ............................................................................. 116
Figure 11.2: Wiring diagram D−LX 200… /MP3, D−LX 720… /MP3 .................................................. 117
Figure 11.3: Dimensional drawing D−LX 200 ..................................................................................... 118
Figure 11.4: Dimensional drawing D−LX 720 ...................................................................................... 119
Figure 11.5: Dimensional drawing D−LX 200 Ex ................................................................................ 120
Figure 11.6: Dimensional drawing D−LX 720 Ex ................................................................................ 121
Figure 16.1: Start display InformationCentre ...................................................................................... 140
Figure 16.2: "Connection" menu for the InformationCentre ................................................................. 140
Figure 16.3: Display views InformationCentre .................................................................................... 141
Figure 16.4: Flame Information window .............................................................................................. 142
Figure 16.5: Wave form of a measuring cycle ..................................................................................... 143
Figure 16.6: System Settings .............................................................................................................. 144
Figure 16.7: "File" Menu ....................................................................................................................... 145
Figure 16.8: "FileSetting" sub-menu ..................................................................................................... 145
Figure 16.9: "ReadFile" sub-menu“ ...................................................................................................... 145
Figure 16.10:"Connection" menu ......................................................................................................... 147
Figure 16.11:"Option" menu ................................................................................................................. 147
Figure 16.12:"Adjust CurrentOutput" sub-menu ................................................................................... 148
Figure 16.13: Extra window with error message .................................................................................. 149

Contents
6 D−LX 200, D−LX 720
Index of tables
Table 3.1 Zone classification DURAG--equipment .............................................................................. 24
Table 3.2 DURAG-equipment EPL ...................................................................................................... 25
Table 3.3 Permitted seals / 84Ex-equipment....................................................................................... 27
Table 3.4 Permitted seals / 87Ex-equipment....................................................................................... 28
Table 5.1: Default settings D−LX 200, D−LX 720 ................................................................................ 48
Table 5.2: Suitability of the device versions (spectral range) ............................................................... 49
Table 6.1: Meaning of the LEDs ........................................................................................................... 65
Table 7.1: Preconditions for operation checklist ................................................................................... 82
Table 8.1: Setting the gain characteristic curve on MODE switches S3 and S4 .................................. 93
Table 8.2: Switch setting of the MODE switch S3 and S4 (safety time) ............................................. 100
Table 8.3: X2 jumper setting ............................................................................................................... 101
Table 8.4: Setting the MODE switch S5 ............................................................................................. 103
Table 9.1: Fault messages ................................................................................................................. 109
Table 10.1: Technical data for the basic device ................................................................................. 113
Table 10.2: Technical data for the basic device ................................................................................. 114
Table 10.3: Technical data for the basic device ................................................................................. 115
Table 10.4: Factory Settings (Default) ................................................................................................ 115
Table 10.5: Technical Data of the integrated flame sensor ................................................................ 115
Table 10.6: Pre-settings...................................................................................................................... 115
Table 16.1: System Settings ................................................................................................................ 144
Table 16.2: Data set structure ............................................................................................................. 151
Table 17.1: Modbus RTU Message Frame ......................................................................................... 153
Table 17.2: Modbus-Slave Address Range ......................................................................................... 153
Table 17.3: Modbus Function Code .................................................................................................... 153
Table 17.4: Modbus FunctionCode(0x03..0x04) Read 16BitRegisters Request ................................ 153
Table 17.5: Modbus Function Code(0x03..0x04) Read 16BitRegisters Response ............................. 154
Table 17.6: Modbus Function Code(0x10) Write Multiple 16BitRegisters Request ............................ 154
Table 17.7: Modbus Function Code(0x10) Write Multiple 16BitRegisters Response ......................... 154
Table 17.8: Modbus RTU:Register and Address-Information ............................................................. 155
Table 17.9: Modbus RTU register and device-specific address information ....................................... 156

D−LX 200
D−LX 720
Compact Flame Monitor
1General
1.1 Information on Operating instructions
1.2 Explanation of Symbols
1.3 Limitation of liability
1.4 Information regarding warranty
1.5 Spare parts
1.6 Customer service
1.7 Copyright
1.8 Trademarks

1 General
D−LX 200, D−LX 720 9
1 General
Our intention is to make a significant contribution to your success with our
products and services. We would be pleased if we achieved this with the
information contained in this Operating instructions.
Should you require information that is not sufficiently covered in this document,
please request the required information from the relevant agent of DURAG
GmbH. Our Support and Service team will also gladly answer questions
regarding products and applications from the DURAG GROUP. Addresses and
telephone numbers can be found on page 159.
If anything is not clear:
Contact the manufacturer! Get your questions answered.
You can also get information on ventures and products at www.durag.de
1.1 Information on Operating instructions
This Operating instructions gives important instructions on using the Compact
Flame Monitor D−LX 200. Adherence to all safety guidelines and instructions
is a prerequisite for safe working.
In addition, observe the locally applicable accident prevention regulations and
general safety provisions for the Compact Flame Monitor and the range of
applications.
Before starting any work, please read the Operating instructions!
In particular read chapter 2 and the respective safety instructions in full.
The operating instructions are an integral part of the product and must be kept
in the immediate vicinity of the Compact Flame Monitors D−LX 200, accessible
to all staff.
This documentation
 (approx. 160 pages) was compiled with the greatest care;
 is not intended for the US market. Documentation to ANSI Z535 is
available on request. Order addresses can be found on page 159;
 or parts thereof may not be reproduced or distributed without express
permission from DURAG GmbH, irrespective of how this is done, in what
language or by what medium, electronic or mechanical;
 always relates to the complete device, even if individual program modules
or parts have not been purchased;
 relates to the current design of the device at the time of update of this
documentation (see above);
 is subject to changes to its content without notification;
contains figures which may differ due to further technical developments or to
the manageable scale of their actual appearance. No claims regarding the
supply of identical products can therefore be derived from the illustrations
shown.

1 General
10 D−LX 200, D−LX 720
1.2 Explanation of Symbols
To make the text of this Operating instructions easily understandable,
elements such as safety instructions, warnings, tips, keypad symbols,
addresses etc. are represented differently.
Warnings in this Operating instructions are identified with symbols. Instructions
are introduced with key words that highlight the extent of the hazard.
All instructions must be unconditionally and carefully observed to avoid
accidents, injury and material damage.
Warning
DANGER!
...indicates an immediate situation of danger that will lead to death or serious
injury if not avoided.
WARNING!
...indicates a possible situation of danger that will lead to death or serious
injury if not avoided.
CAUTION!
...indicates a possible situation of danger that can lead to minor or slight injury
if not avoided.
...indicates a possible situation that can lead to material or environmental
damage if not avoided.
Tips and Recommendations
A hint or tip is represented in such a way:
... highlights useful tips and recommendations, as well as information aimed
at ensuring efficient and fault-free operation.
Specific safety instructions
To draw attention to specific hazards, warning notices and signal words are
used in conjunction with the following symbols:

1 General
D−LX 200, D−LX 720 11
General warning sign
Hot surface
Electric current
Moisture
explosive atmosphere
Electrostatically
endangered
components (ESD)
Other symbols used
Apart from the warning notices and safety instructions, the following general
instructions and associated pictograms are used to draw particularly important
information to your attention:
Before starting any work, please read the Operating instructions!
Instructions relating to environmental protection
Information marked in this way is only relevant if the optionally available
software (→) D−LX 200 InformationCentre is installed to the system
configuration. The D−LX 200 can be operated without using this software.
Disposal instructions; the product is not to be treated as normal domestic
waste, must be disposed of as special waste in line with local regulations.
Explicitly marked paragraphs relate only to versions of the device in Ex-
version.
Explicitly identified paragraphs only refer to the specified device variant. All
other information applies for both device variants.
Paragraphs marked in this way give information on permitted ATEX zones of
the described devices in Ex-version.
This DIP switch is OFF
This DIP switch is ON

1 General
12 D−LX 200, D−LX 720
 A (→) indicates that the following term is explained in the glossary.
× A × in a list indicates that something must not be done or that something is
not suitable.
 Unless otherwise stated, all measurements are in mm
 This Operating instructions are also available in PDF format.
1.3 Limitation of liability
All information and instructions in this manual have been compiled on the
basis of the applicable standards and regulations, current technology and
many years of knowledge and experience.
The manufacturer accepts no liability for damages arising from:
 Disregard of the Operating instructions
 Incorrect use
 Use of unauthorised personnel (see Chapter 2.7 from page 20)
 Unauthorised modifications
 Technical changes
 Use of unapproved spare parts
 Use of defective and/or improperly repaired devices
Furthermore, the obligations agreed in the contract of sale, the general
conditions of business ("Conditions of supply for goods and services in the
electrical industry" (ZVEI)) and the manufacturer's Conditions of Supply,
together with the statutory regulations in force at the date of signing the
contract are all applicable.
1.4 Information regarding warranty
The terms of the warranty can be found as a separate document in the
General Terms and Conditions of Business.
Modifications and changes to the Compact Flame Monitor are not permitted.
Any tampering with the device will render the warranty null and void.
Fault-free and safe operation of the device depends on appropriate
transportation, correct storage, installation and assembly as well as careful
operation.
1.5 Spare parts
WARNING!
Danger of injury from incorrect spare parts!
Incorrect or defective spare parts can lead to damage, malfunctions or total
failure and may also impair safety.
 Only use genuine spare parts supplied by the manufacturer.
 Spare parts can be obtained from an authorised agent or directly from the
manufacturer.
For the manufacturer's address, see page 2.

1 General
D−LX 200, D−LX 720 13
1.6 Customer service
If anything is unclear, contact the manufacturer. Our Service Department is
available to provide any technical information you may require.
Information about responsible offices and partners can be obtained at any time
over the Internet. See the manufacturer addresses listed on page two, or
DURAG GROUP company addresses on page 159.
1.7 Copyright
This Operating instructions must be kept confidential. It is intended exclusively
for personnel employed to use the Compact Flame Monitor. Passing on this
Operating instructions to third parties without the written consent of the
manufacturer is not permitted.
The Operating instructions or parts of it may not be duplicated or transferred
without the written consent of the manufacturer or translated into any other
languages, irrespective of the method or means, whether electronically or
mechanically.
© DURAG GmbH 2017 All rights reserved.
The specifications, texts, drawings, pictures and other information contained
in this document are protected by copyright and subject to industrial property
rights. Any improper use is punishable by law.
1.8 Trademarks
Microsoft Windows NT, Windows XP, Windows Vista, Windows 7 and Excel
are registered trade marks of Microsoft Corp. All programs and descriptions
used in this manual may be subject to the trade mark of the manufacturer and
may not be used for commercial purposes or in any other way.

1 General
14 D−LX 200, D−LX 720

D−LX 200
D−LX 720
Compact Flame Monitor
2Safety instructions
2.1 General safety instructions
2.2 Hazards due to electrical equipment
2.3 Hazard due to hot, aggressive or explosive gases
2.4 Hazard to the device due to purge air failure
2.5 Designated use
2.6 Avoidance of consequential damage in the event of a system fault
2.7 Qualified personnel

2 Safety instructions
D−LX 200, D−LX 720 17
2 Safety instructions
The knowledge and the technically flawless implementation of the safety
instructions and warnings contained in this manual are necessary for the safe
assembly and commissioning, as well as for the safety during operation and
maintenance of the described product. Only suitably qualified personnel will
possess the necessary technical knowledge to correctly interpret the
instructions regarding safety instructions and warnings given in a general
sense in this document and implement them in the concrete circumstances of
the individual case, applying appropriate procedures.
Please comply strictly with the following warnings and safety instructions in
this manual. They serve to avert dangers to life and limb of users and
maintenance personnel and to prevent damage to property.
2.1 General safety instructions
The DURAG Compact Flame Monitor D−LX 200, D−LX 720 is in accordance
with the current state of technology and the recognised technical safety
regulations, hazards can nevertheless arise.
Therefore operate the product only when it is in perfect condition, and observe
the operating instructions. Any change to normal operation should be taken as
a serious indication of impaired functionality. In this context pay attention to:
 Emission of smoke or unusual smells,
 Excessive temperatures of system components,
 Changes in power consumption without obvious cause,
 Tripping of monitoring devices.
Improper use of handling can result in health hazards or damage. Therefore,
please read this chapter thoroughly and comply with the instructions during all
activities on the D−LX 200, D−LX 720 as well as the safety instructions and
warnings in the individual chapters of this operating manual.
In principle, the following warnings and safety instructions apply for the
D−LX 200, D−LX 720:
The flame monitor is a type approved device. Any intervention or
modifications will render the approval null and void. Repairs may only be
undertaken by the manufacturer or those appointed by it, as only they can
verify full functionality following repair, by means of extensive long-term tests
and suitable test devices.
 The statutory provisions applicable for the system and the technical
regulations implementing these provisions must be complied with during
preparation and performance of work.
 Act in a manner appropriate to the system-specific circumstances and
hazards associated with operation of the equipment, and in compliance
with regulations.
 Operating instructions and documentation for the D−LX 200, D−LX 720
device must be available locally. The information highlighted for the
prevention of hazards and damage must be complied with.

2 Safety instructions
18 D−LX 200, D−LX 720
 Suitable protective mechanisms and personal protective equipment must
be available in sufficient quantities and used by the personnel in
accordance with the relevant potential hazards.
 The device may be used only when in faultless condition and in
compliance with the safety instructions!
 The device as a whole and also its individual components may be used
only when in their original configuration.
 Any interventions or modifications to the design of approved devices will
result in loss of the approval.
2.2 Hazards due to electrical equipment
This device is powered by electricity. Therefore only appropriately qualified
personnel may work on it. Such personnel must be thoroughly familiar with all
sources of hazards and repair measures described in these operating instructions.
DANGER!
High voltage. Danger of fatalities due to electrical current!
Coming into contact with live parts poses a direct risk of fatalities.
Damage to the insulation or to individual components can lead to fatal injury.
Before removing the casing or guard, check that the devices are deenergised.
 The devices may only be connected to the supply voltage indicated on the
type label.
 Cables must be routed so as to exclude the possibility of a risk of accident
by persons stumbling over them or hanging from them.
We recommend a power supply that guarantees reliable isolation between the
primary and secondary circuits (e.g. the DURAG D-NG 24/05).
CAUTION!
Damage to electronic components due to electrostatic discharge (ESD)
Electronic components are becoming increasingly small and complex. Their
susceptibility to damage from electrostatic discharge is increased accordingly.
To protect these components, measures must be undertaken to prevent
electrostatic discharge for all work performed at the open device (ESD
protection).
To prevent static discharge from the human body, personnel may be equipped, for
instance, with a personal earthing system.
2.3 Hazard due to hot, aggressive or explosive gases
DANGER!
Danger of explosion in potentially explosive and hazardous areas!
Incorrect handling and operation can result in serious injury and material
damage.
The use of the Compact Flame Monitor D−LX 200, D−LX 720 in potentially
explosive and hazardous areas is only permitted with the correspondingly
marked device version intended for this environment!! Pay attention to the
instructions on explosion protection in Chapter 3. Pay attention to the
imprinted zone markings.

2 Safety instructions
D−LX 200, D−LX 720 19
 The Compact Flame Monitor is mounted directly at the boiler. In the case
of systems with a low danger potential (ambient pressure, low
temperatures, no health hazard), mounting/removal can occur during
system operation. The applicable provisions and safety regulations for the
system must be complied with and any necessary and appropriate
protective measures taken.
CAUTION!
Danger of burns due to hot surfaces!
Contact with hot components can cause burns.
 Where any work is undertaken in the vicinity of hot components,
protective work clothing and gloves are always to be worn.
 Prior to any work ensure that all components have cooled down to the
ambient temperature.
CAUTION!
Explosion protection (ATEX, FM, CSA, ...)
When using Ex-devices and Ex-components (see Ex type label) always read
the instructions and safety information in Chapter 3 Explosion protection.
2.4 Hazard to the device due to purge air failure
The purge air serves to protect the system mounted on the boiler. It shields
the components from hot and/or aggressive gases and dusts. The purge air
supply must therefore be reliably ensured even when the system is
stationary. If the purge air fails, the lens can quickly become soiled and the
device can overheat due to heat accumulation and be destroyed.
The operating company must therefore ensure that:
 the purge air supply operates reliably and without interruption,
 any failure is detected immediately,
 the Compact Flame Monitor is protected in cases of purge air failure
through ventilation or dismantling.
2.5 Designated use
Designated use, see Chapter 5.5 from page 48.
2.6 Avoidance of consequential damage in the event of a system
fault
For avoidance and limitation of faults that could lead directly or indirectly to
personal injuries or damage to property, the operating company must ensure that:
 responsible maintenance personnel are available at short notice at any
time.
 maintenance personnel are trained in the targeted localisation and rectification
of faults in the D−LX 200, D−LX 720 and associated systems.

2 Safety instructions
20 D−LX 200, D−LX 720
 defective system components can be switched off immediately.
 switching off the device will not lead to unpredictable consequential faults
and damage.
2.7 Qualified personnel
The operating company's personnel who are responsible for safety must
ensure that work on DURAG devices or systems is only carried out by
qualified specialist personnel, whose competence has been verified by
responsible experts.
In the event of unqualified work on the device or failure to comply with the
warnings provided in this manual or attached to the device, physical injuries
and/or damage to property can occur.
Qualified personnel for the purposes of the safety-related instructions in this
manual or on the product itself are persons who can identify potential hazards
in good time and prevent them. A definition of adequately skilled personnel is
provided in DIN VDE 0105 or IEC 364 or directly comparable standards.
The following knowledge is specifically required:
 Detailed knowledge of hazards arising during operations
 Knowledge of system conditions, pertinent standards, regulations and
accident prevention regulations.
 Sufficient knowledge of the system D−LX 200, D−LX 720. DURAG offers
appropriate training courses in this respect.
On the basis of this training, qualified personnel are authorised by the person
responsible for the safety of people and the system to carry out work on
DURAG equipment or systems,
 Either as project planning personnel, familiar with the safety concepts of
automation technology,
 As operating personnel, instructed in using automation technology
equipment and familiar with the contents of this manual relating to
operation,
 As repair and/or service personnel, with training that qualifies them to
repair such automation technology equipment or with authorisation to
commission, earth and mark circuits and devices/systems in accordance
with the relevant safety standards.
CAUTION!
Burner controls and flame monitors are devices subject to type approval. Any
intervention or modifications will render the approval null and void.
The above qualifications expressly exclude intervention in and modifications
to type approved devices!
Repairs may only be performed by the manufacturer or his representatives.
Only in this way is it possible to ensure that the prescribed tests and
measurements can be performed following repairs or other procedures (using
the necessary special devices and with the requisite specialist expertise).
Burner controls and compact flame managers are used to ensure the safe
operation of burner installations. The reliability of these devices is vital, and
requires particularly careful checking of all functions with a subsequent
acceptance procedure following any intervention.