AP LRS04 Ex User manual

Instruction manual LRS 04 Ex
ATEX
Duct Smoke Detector
LRS 04 Ex
Manual
October 2010

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ATEX –Duct Smoke Detector
Content
Content ..................................................................................................................................................................2
1 Introduction ........................................................................................................................................................4
2 Aboutthisdocument .......................................................................................................................................5
2.1 Objectives and intended readers .............................................................................................................5
2.2 Symbols used ................................................................................................................................................5
3 Safety ....................................................................................................................................................................6
3.1 Guarantee claims .........................................................................................................................................7
4 Project planning ...............................................................................................................................................8
5 Technical data .....................................................................................................................................................9
6 General information .....................................................................................................................................11
6.1 Operation of the LRS 04 Ex .....................................................................................................................11
6.2 Transport,storageandunpacking ..........................................................................................................11
6.3 Scope of delivery .......................................................................................................................................11
7 Rules and regulations ...................................................................................................................................12
7.2 Safety in potentially explosive atmospheres ...........................................................................................13
7.3 Intended use ...............................................................................................................................................13
7.4 General safety information and protective measures .......................................................................14
7.4.1 Explosion-protection regulations ..............................................................................................14
7.4.2 Classification of hazardous areas ..............................................................................................17
8 Product description ........................................................................................................................................18
8.1 Design and mode of operation of LRS 04 Ex .........................................................................................18
8.1.1 Terminal assignment in the connection box of the LRS04Ex ..........................................20
8.2 Device functions and display elements of the LRS 04 Ex ...................................................................20
8.3 Accessories for the LRS 04 Ex ...................................................................................................................21
8.3.1 Power supply and tripping unit NAG 03 .................................................................................21
8.3.2 Signal and display control element SAB 04 ...........................................................................24
8.3.3 Manual actuation pushbutton 422 Ex .....................................................................................24
8.3.4 Connection box Ex ..........................................................................................................................25

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8.3.5 Smoke switch condition indicator RZA 142 ...........................................................................26
9 Installationdirections ....................................................................................................................................27
9.1 Mechanical installation of the LRS 04 Ex ..............................................................................................27
9.2 Electrical connection .................................................................................................................................30
9.3 Switching examples ..................................................................................................................................34
10 Commissioning ............................................................................................................................................37
10.1 Functional testing .....................................................................................................................................37
10.2 Servicing ......................................................................................................................................................38
10.3 Displayof operating statuses of the ORS 221 Ex ................................................................................39
11 Provisions for maintenance and servicing ........................................................................................40
12 Ordering data ........................................................................................................................................41

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ATEX –Duct Smoke Detector
1 Introduction
Fig. 01 LRS 04 Ex
The Duct Smoke Detector LRS 04 Ex comprises the ventilation duct base LKS
02, the optical smoke switch ORS 221 Ex and the ORS 142 Ex interface
(connection box). These components are fitted onto the mounting plate and
prewired. It is used for smoke monitoring in ventilation ducts with potentially
explosive atmospheres.
The Duct Smoke Detector LRS 04 Ex is ATEX-approved and can be used in
zones 1 and 2 (IBExU04ATEX1105, IBExU04ATEX1106).
Duct Smoke Detector LRS 04 Ex is used for incorporation of the optical smoke
switch ORS 221 Ex and is mounted on the ventilation duct from the outside.
The Duct Smoke Detector LRS 04 Ex is designed for application within
buildings.
Caution:
The specifications in the explosion protection document must be observed.
The ventilation ducts must be thoroughly cleaned before taking a smoke
switch in ventilation systems into operation.

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2 About this document
2.1 Objectives and intended readers
This document is intended to inform you about operation and installation of a
electrical system in potentially explosive areas. You will find information on the
following subjects:
• Safety
• Design and mode of operation
• Use of the product
• System components
• System integration
• Commissioning
• Servicing
This document is intended for the following groups of persons:
• Installation planners
• Specialist planners
• Installation technicians
• Safety officers
• Service and maintenance personnel
2.2 Symbols used
Some items of information in this document are specially emphasised in order to
ensure quick access to such passages.
Danger!
This symbol is used to indicate information that is of importance for health
and safety of persons. Non-observance may lead to damage to health and
personal injury.
Warning of potential damage to equipment!
This symbol is used to indicate information that is important for correct
operation of the unit. Non-observance may lead to damage to the unit.
Note:
A note informs you about special features of the unit, explains important
background information, or recommends a particular course of conduct.

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3 Safety
Avoid damage to markings!
The type plates, type designations and/or identification markings on the
devices and conductor plates must not be removed, overwritten, or made
illegible.
The Directive 94/9/EC requires that the manufacturer and reseller ensure
traceability of a product to the end user. The administration procedures for
our products include a production number which is permanently marked
on each product. Please note that the Duct Smoke Detector LRS 04 Ex has
two production numbers:
1. One production number for the smoke switch sensor ORS 221 Ex E
2. One production number for the ORS 142 Ex interface
It is a fundamental rule that, when planning, installing, assembling, and
operating the smoke tripping device for smoke in potentially explosive
atmospheres, specific national rules and regulations must be observed.
In any case, the following planning information is subordinate to specific
national provisions.
Caution - explosion hazard!
When carrying out any work in areas in which the Duct Smoke Detector LRS
04 Ex may be installed, all necessary safety measures must be adopted to
ensure that the work does not cause an explosion. Any work in hazardous
areas must be authorised in writing by the responsible safety officer.
Observe and follow the Instruction Manual!
The Instruction Manual for operation and installation of smoke tripping
device for smoke in potentially explosive areas is an integral part of the
product. Before any handling, installation and start-up of units the follow-
ing safety instructions, as well as descriptions and information about the
present Instruction manual must be carefully read and observed.

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3.1 Guarantee claims
In case of non-compliance with the requirements/specifications contained in this
Instruction Manual any claims for guarantee and liability of the manufacturer
shall become invalid. Non-compliance with this clause will result in any claims
for guarantee and liability against the manufacturer of the devices becoming
null and void.

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4 Project planning
The Duct Smoke Detector LRS 04 Ex is designed for application in rectangular
ventilation ducts of 0.5 m to 1 m in diameter. In ventilation ducts with a round
cross section, application is possible for Ø from 0.2 m to 1 m. The detection
range to the side of the inlet tube in the channel is approx. 500 mm. The air
channel base must be positioned such that reliable smoke detection can be
assumed. Any interference factors that may impair safe functioning of the LRS
04 Ex must be ruled out. If required, the length of the inlet tube must be
adjusted accordingly, see chapter 9 Installation.
Fig.4-01
A recommendation for project planning is provided in Fig. 02.
In order to ensure reliable smoke detection in larger channels several LRS 04 Ex
should be used. In doing this, the parameters of the ventilation duct with regard
to monitoring of the centre of the air flow must be observed.
Fig.4-02
Direction of air flow
A1: Ideal operating environment
A2: Increased dust load
B: Area not suitable for early smoke detection
Hydraulic diameter

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5 Technical data
LRS 04 Ex
Field of application Round and rectangular ventilation duct with
potentially explosive atmosphere of zones 1 and 2
Functional principle Scattered light
Smoke switch ORS 221 Ex
Response threshold According to the construction and testing princi-
ples for tripping devices for smoke (12/76)
Min. air flow 1 m/s
Max. air flow 20 m/s
Openings 2 x Ø 28-30 mm/150 mm distance for installation in
housing 3 x max. 6 mm or 3 pairs of openings for
passing through 3 tensioning straps
Current consumption with 28 V DC
Quiescent
In alarm
In case of a failure
Relay contact in Ex interface
Max. switching voltage
Max. switching current
Switching power max.
Max. 12 mA
Max. 1.8 mA
Max. 2.7 mA
30 V DC/30 V AC
1 A
30 W
Inlet tube Standard length in the channel 344 mm
bore diameter Ø 28-30 mm
Temperature range of operating environment –20 °C to +70 °C
Degree of protection according to EN 60529 IP 54 (on duct surface)
IBExU certificate number ORS 142 Ex interface IBExU 04 ATEX 1105
Colour Blue, black, white and transparent
Materials PC/polyester/aluminium tube
Installation On round and rectangular ventilation ducts
Cable entry 2 ATEX glands M16 x 1.5 with Ø 4-8 mm and
1 mushroom plug
Dimensions without pipe See dimensioned drawing (Fig. 9-01)
Weight of ventilation-duct smoke switch system 2740 g
(incl. inlet tube and ORS 221 Ex)
Equipotential bonding connection M6

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ATEX –Duct Smoke Detector
Smoke switch ORS 221 Ex
Functional principle Scattered light
Response threshold According to the construction and testing princi-
ples for tripping devices for smoke (12/76)
Degree of protection IP 40
Ambient temperature during operation –20 °C to +70 °C
Weight 120 g
Additional output Terminal 3 (for communication only)
IBExU certificate number ORS 221 Ex IBExU04ATEX1106
Terminal cross section in ORS 142 Ex Max. 1.5 mm²
interface (connection box)
Note:
The ORS142 Ex interface (connection box) is prewired with the base of the
optical smoke switch ORS 221 Ex at the factory. This wiring must not be
changed!
Note:
The ORS 221 Ex is automatically reset as soon as the sensing chamber is free
of smoke. For alarm storage, the power supply unit or the connection box of
the hold-open system FAD 01/FAK 01 can be equipped with a signalling and
display control element SAB 04.

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6 General information
6.1 Operation of the LRS 04 Ex
During operation, the air of the ventilation duct to be monitored permanently
flows through the ventilation-duct smoke switch system LRS 04 Ex. As soon as
smoke particles are detected, an alarm is triggered and the safety devices are
activated. As soon as the sensing chamber is free of smoke particles again, the
LRS 04 Ex is reset automatically.
6.2 Transport, storage and unpacking
The LRS 04 Ex is delivered packed in an appropriate fitted carton. The packaging
can be recycled.
Please observe the packaging properties!
The cardboard packaging of the LRS 04 Ex fulfills the minimum packaging
requirements and when stacked, has a load-bearing capacity of up to 10 times
of its own weight. The packaging is only conditionally suitable for transport
by post or rail. Special packaging is available for transport in tropical zones,
transport by ship, etc. For more information, please contact the manufacturer.
Do not open the packaging until the unit is required for use. Retain the enclosed
instructions for installation.
6.3 Scope of delivery
– Housing with transparent cover
– Inlet tube: Overall length 415 mm, with standard installation depth of
344 mm in the channel, prewired with earth cable
– Flow adapter ORS 221 Ex
– 2 ATEX glands M16 x 1.5, of which one is equipped with an Ex mushroom
plug
– 3 LKS sealing rings
– 3 adhesive pads
– 3 self-cutting fastening screws
– 2 spring washers M6
– 2 nuts M6
– Instruction manual
– Packaging and labelling
– Optical smoke switch ORS 221 Ex

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7 Rules and regulations
For fire protection in ventilation systems the requirements of §3 and §17 of MBO
(German Model Building Regulation) apply, among others. These requirements
shall be included in the building regulations of the respective country. The rules
and regulations applicable in the country of use must be observed.
Extract from Model Building Regulation § 17:
"Buildings, plants and facilities must be designed such that development and
spreading of fire and smoke is prevented and in case of a fire rescue of people
and animals as well as efficient fire-extinguishing measures are possible."
As a general principle, all rules and regulations must be observed in
parallel in case that a product falls within the scope of application of
several regulations, in order to also comply with the special require-
ments of every regulation.
7.1 Definition of the field of application
The product LRS 04 Ex is intended for smoke detection in ventilation systems
in potentially explosive atmospheres. The sensor can be installed in ventilation
ducts with air flow speeds between 1 m/sec. and 20 m/sec.
For any such rules and regulations, please consider the explosion protection
document or contact the explosion protection responsible.
Caution: The applicable rules and regulations must be observed for plan-
ning, designing, execution, application and maintenance.

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7.2 Safety in potentially explosive atmospheres
7.3 Intended use
The LRS 04 Ex is a tripping device for smoke for application in ventilation
systems in potentially explosive atmospheres. This tripping device for smoke
LRS 04 Ex is an integral part of an air-conditioning system and as such it may
only be used if correctly integrated into the ventilation system Both during
commissioning and operation, the safety instructions as well as the acceptance
and testing provisions of the rules and regulations to be applied for this hazard-
ous area contained in the present Instructions Manual must be observed without
failure.
Ensure proper use!
– The appliance LRS 04 Ex was developed for application in potentially
explosive areas classified as zone 1 or zone 2.
– The technical data stated on the equipment must be observed.
– Modifications or changes to the equipment are not permitted.
– The device must be used only for its intended purpose in an undamaged
and unobjectionable condition.
– Only the ORS 221 Ex may be used as replacement smoke switch.
– A work permit must be obtained from the operator/responsible person
before performing any work.
Only clean with a damp cloth or sponge!
In order to avoid electrostatic charging, only use damp cloths for cleaning
purposes.
Please observe the following rules for tripping devices for smoke in hazard-
ousareas:
–The LRS 04 Ex must not be used for doors and shutters of areas in which
a potentially explosive atmospheres due to combustible dust is to be
assumed (zones 20 to 22).

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7.4 General safety information and
protective measures
7.4.1 Explosion-protection regulations
In Germany, the most important points with regard to putting technical equip-
ment on the market are covered by the Eleventh Administrative Order to the
Equipment and Product Safety Law 11. GPSGV.
Extract from § 1
"The order shall apply for putting equipment and protective systems on the
market for proper use in hazardous areas."
According to its intended use, equipment is divided into groups in accordance
with Directive 94/9/EC, and assigned to equipment categories for proper use in
hazardous areas.
Extract from § 3
"Equipment, protective systems, and devices [...] may not be put on the market
unless they comply with the basic health and safety requirements of Directive
94/9/EC and unless they do not endanger the health and safety of persons [...]
and goods, provided that they are correctly installed, maintained and properly
used.
The legal requirements that govern explosion protection in the workplace are
not uniform. Directive 94/9/EC determines the requirements for equipment and
systems.
Directive 1999/92/EC is to be regarded as "user's directive". It specifies the types
of equipment and systems that can be used and provides rules for operation and
monitoring of plants with potential explosion hazards. In addition, there are
various regulations that fall within the scope of the Equipment Safety Law and
occupational health and safety regulations to be taken into account. Considera-
tion must also be given to accident prevention rules, guidelines by the German
employer's liability insurance association that may be issued for specific types of
plants.
The following shall apply in Germany: On the basis of the body of regulations
the owner/operator shall prepare or have prepared a safety concept containing
a detailed hazard analysis. In this context, a specific order of principles must be
taken into account.

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As a general rule, the following hierarchy of protective measures shall be
observed:
1. Development of a potentially explosive atmosphere must be prevented.
– Primary explosion protection
– Sum of measures that prevent development and propagation of a poten-
tially explosive atmosphere.
2. Ignition of a potentially explosive atmosphere must be prevented.
– Secondary explosion protection
– Sum of measures that prevent potential ignition sources from becoming
effective
3. The potential impacts of an explosion must be minimised.
– Tertiary explosion protection
– Sum of measures that limit the impacts of an explosion to an innocuous
level.
A follow-up hazard analysis should in particular address the following points:
– Determination of explosion risks to which employees might be exposed
– Selection of appropriate measures for achieving the desired level of protection
– Safe layout, operation and servicing of work equipment, warning devices and
protective equipment
For connected areas!
Areas that are or could be connected via openings to areas in which poten-
tially explosive atmospheres may occur must also be taken into considera-
tion for assessment of the explosion risks.

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This procedure must particularly be complied with for tripping devices for smoke
in ventilation systems.
Work carried out in ex-zones must be properly regulated and documented. A
work approval system is a suitable method of regulation the organisational
aspects. The employer must ensure that employees are sufficiently and appropri-
ately instructed and trained with regard to explosion protection.
Written instructions and work approval:
It is very important to inspect and test the systems before initial use. If required,
additional measures for maintenance of explosion protection must be taken.
Protective measures must be checked in regular intervals. In the event of signifi-
cant changes, new measures must be adopted where appropriate.
The explosion protection document must be compiled before the start of work.
It must be updated on a regular basis, particularly after changes such as:
– Extensions
– Change of the workplace layout or the work procedures
– Use of different equipment and/or tools
– etc.
Existing documents may be combined.
Warning of potential damage to equipment!
Before starting with any work, a responsible person must
issue a work approval.

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7.4.2 Classification of hazardous areas
Definition of the zones in accordance with Directive 1999/92/EC
Extract:
Hazardous areas are classified in zones on the basis of frequency and duration
of the occurrence of an explosive atmosphere.
Combus-
tible sub-
stances
Frequency and
duration of oc-
currence of the
substances
Zone clas-
sification
Identification of equipment
Equipment
group
Equipment category
Dusts
Permanent,
long-term or
frequently
present
Zone 20
||
1D
Occasionally
present
Zone 21
||
2D or 1D
Short-term or
normally not
present
Zone 22
||
3D, 2D or 1D
Gasses or
vapours
Permanent,
long-term or
frequently
present
Zone 0
||
1G
Occasionally
present
Zone 1
||
2G or 1G
Short-term or
normally not
present
Zone 2
||
3G, 2G or 1G
Notes:
Layers, deposits and accumulations of combustible dusts must be considered in
the same way as is performed for every other source leading to formation of an
explosive atmosphere.
The present information is intended as a summary and does not include all
aspects that need to be considered. Further relevant laws, regulations and provi-
sions applicable in the country of application must be observed as appropriate.

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8 Product description
8.1 Design and mode of operation
of LRS 04 Ex
The Duct Smoke Detector LRS 04 Ex is preferably used in hazard areas classified
as zone 1 or 2. It detects both smoldering fires and open fires with development
of smoke at a very early stage. The Duct Smoke Detector utilises the scattered-
light principle. Inside the sensing chamber, a light source and a light sensor are
arranged such that the light beam of the light source cannot directly fall on the
light sensor. It is only when airborne particles enter the chamber that the light
scattered by these particles (Tyndall effect) reaches the sensor and is converted
into an electrical signal.
The figures below illustrate the structure and layout of the ventilation-duct
smoke switch system LRS 04 Ex:
 Cable entry 1
 Cable entry 2
 Equipotential bond-
ing terminal, M6
 Mounting holes
Ø 6 mm
 Opening for tension-
ing strap
Fig. 8-01 Top view LRS 04 Ex
 ORS 142 Ex interface
(connection box)
 LKS 02
 Inlet tube
 Outlet tube
Fig. 8-02 Side view LRS 04 Ex
1
4
5
2
3
6
7
9
8

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Wiring of the Smoke Switch:
Connection of the Smoke Switch must be performed in the ORS142 Ex
interface (connection box) not in the smoke switch base!

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8.1.1 Terminal assignment in the connection box of the
LRS04Ex
 In operation
 De-energised/alarm
Fig.8-03 Relay contacts and connection of the LRS 04 Ex
Terminal 1 24 V DC
Terminal 2 GND
Terminal EB Equipotential bonding (internal only)
Terminal EB Equipotential bonding (internal only)
Terminal 3 RS bus
Terminal 4 Potential-free relay contact: Com
Terminal 5 Potential-free relay contact: NO
Terminal 6 Potential-free relay contact: NC
8.2 Device functions and display elements of
the LRS 04 Ex
The evaluation electronics of the optical Smoke Switch ORS 221 Ex continuously
monitor the smoke sensing unit of the detector and signal the following condi-
tions by the integrated LED alarm:
Normal operation LED flashing green (approx. every 4 seconds),
relay contact is closed
Minor contamination LED flashing in alternating colours green/yellow
(approx. every 4 seconds), relay contact is closed
Heavy contamination LED flashing twice in short succession green/
yellow (approx. every 4 seconds), relay contact is
opened
Failure
(failure of sensing chamber)
LED flashing yellow (approx. every 4 seconds),
relay contact is open
Alarm LED flashing red (approx. once per second), relay
contact is open