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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ATEX –Duct Smoke Detector
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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ATEX –Duct Smoke Detector
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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ATEX –Duct Smoke Detector
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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ATEX –Duct Smoke Detector
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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ATEX –Duct Smoke Detector
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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ATEX –Duct Smoke Detector
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.