ISO 7240-20:2010
(Main)Fire detection and alarm systems — Part 20: Aspirating smoke detectors
Fire detection and alarm systems — Part 20: Aspirating smoke detectors
ISO 7240-20:2010 specifies the requirements, test methods and performance criteria for aspirating smoke detectors for use in fire detection and alarm systems installed in buildings. Aspirating smoke detectors developed for the protection of specific risks that incorporate special characteristics (including additional features or enhanced functionality for which ISO 7240-20:2010 does not define a test or assessment method) are also covered by ISO 7240-20:2010. The performance requirements for any special characteristics are beyond the scope of ISO 7240-20:2010.
Systèmes de détection et d'alarme d'incendie — Partie 20: Détecteurs de fumée par aspiration
General Information
Standards Content (Sample)
INTERNATIONAL ISO
STANDARD 7240-20
First edition
2010-05-15
Fire detection and alarm systems —
Part 20:
Aspirating smoke detectors
Systèmes de détection et d'alarme d'incendie —
Partie 20: Détecteurs de fumée par aspiration
Reference number
©
ISO 2010
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ii © ISO 2010 – All rights reserved
Contents Page
Foreword .v
Introduction.vii
1 Scope.1
2 Normative references.1
3 Terms, definitions and abbreviated terms.2
3.1 Terms and definitions .2
3.2 Abbreviated terms .2
4 Requirements.3
4.1 Compliance .3
4.2 Classification .3
4.3 Individual visual alarm indication.3
4.4 Connection of ancillary devices .3
4.5 Manufacturer's adjustments.3
4.6 On-site adjustment of response behaviour .4
4.7 Response to slowly developing fires .4
4.8 Mechanical strength of the pipework .4
4.9 Hardware components and additional sensing elements in the sampling device.5
4.10 Airflow monitoring.5
4.11 Power supply .5
4.12 Marking.6
4.13 Data.6
4.14 Additional requirements for software controlled detectors.7
5 Tests .8
5.1 General .8
5.2 Repeatability .11
5.3 Reproducibility .11
5.4 Variation in supply parameters.12
5.5 Dry heat (operational) .13
5.6 Cold (operational).14
5.7 Damp heat, steady state (operational) .15
5.8 Damp heat, steady state (endurance).16
5.9 Sulfur dioxide (SO ) corrosion (endurance).17
5.10 Shock (operational) .18
5.11 Impact (operational) .19
5.12 Vibration, sinusoidal (operational) .20
5.13 Vibration, sinusoidal (endurance) .21
5.14 Electromagnetic compatibility (EMC) immunity tests .22
5.15 Fire sensitivity .23
5.16 Mechanical strength of pipe.26
6 Test report.26
Annex A (informative) Apparatus for response threshold value measurements.27
Annex B (normative) Smouldering (pyrolysis) wood fire (TF2) .32
Annex C (normative) Reduced smouldering pyrolysis wood fires (TF2A and TF2B).34
Annex D (normative) Glowing smouldering cotton fire (TF3) .36
Annex E (normative) Reduced glowing smouldering cotton fire (TF3A and TF3B).38
Annex F (normative) Flaming plastics (polyurethane) fire (TF4) .40
Annex G (normative) Flaming liquid (n-heptane) fire (TF5) .42
Annex H (normative) Reduced flaming liquid (n-heptane) fire (TF5A and TF5B).43
Annex I (normative) Fire test room and ventilation system.45
Annex J (informative) Information concerning the requirements for the response to slowly
developing fires .48
Annex K (informative) Apparatus for airflow monitoring test .52
Bibliography .54
iv © ISO 2010 – All rights reserved
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
technical committees. Each member body interested in a subject for which a technical committee has been
established has the right to be represented on that committee. International organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the
International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 7240-20 was prepared by Technical Committee ISO/TC 21, Equipment for fire protection and fire fighting,
Subcommittee SC 3, Fire detection and alarm systems.
ISO 7240 consists of the following parts, under the general title Fire detection and alarm systems:
⎯ Part 1: General and definitions
⎯ Part 2: Control and indicating equipment
⎯ Part 3: Audible alarm devices
⎯ Part 4: Power supply equipment
⎯ Part 5: Point-type heat detectors
⎯ Part 6: Carbon monoxide fire detectors using electro-chemical cells
⎯ Part 7: Point-type smoke detectors using scattered light, transmitted light or ionization
⎯ Part 8: Carbon monoxide fire detectors using an electro-chemical cell in combination with a heat sensor
⎯ Part 9: Test fires for fire detectors [Technical Specification]
⎯ Part 10: Point-type flame detectors
⎯ Part 11: Manual call points
⎯ Part 12: Line type smoke detectors using a transmitted optical beam
⎯ Part 13: Compatibility assessment of system components
⎯ Part 14: Guidelines for drafting codes of practice for design, installation and use of fire detection and fire
alarm systems in and around buildings [Technical Report]
⎯ Part 15: Point type fire detectors using scattered light, transmitted light or ionization sensors in
combination with a heat sensor
⎯ Part 16: Sound system control and indicating equipment
⎯ Part 17: Short-circuit isolators
⎯ Part 18: Input/output devices
⎯ Part 19: Design, installation, commissioning and service of sound systems for emergency purposes
⎯ Part 20: Aspirating smoke detectors
⎯ Part 21: Routing equipment
⎯ Part 22: Smoke-detection equipment for ducts
⎯ Part 24: Sound-system loudspeakers
⎯ Part 25: Components using radio transmission paths
⎯ Part 27: Point-type fire detectors using a scattered-light, transmitted-light or ionization smoke sensor, an
electrochemical-cell carbon-monoxide sensor and a heat sensor
⎯ Part 28: Fire protection control equipment
A part 23, dealing with visual alarm devices, is under preparation.
vi © ISO 2010 – All rights reserved
Introduction
This part of ISO 7240 is based on a European Standard EN 54-20:2006, prepared by the European
Committee for Standardization CEN/TC 72 “Fire detection and fire alarm systems”. It has been reviewed and
revised by ISO/TC 21/SC 3/WG 21.
Aspirating smoke detectors differ from point-type smoke detectors (see ISO 7240-7) in that air is drawn into
the smoke-sensing chamber, rather than relying on convection.
This part of ISO 7240 is not intended to place any other restriction on the design and construction of such
detectors.
INTERNATIONAL STANDARD ISO 7240-20:2010(E)
Fire detection and alarm systems —
Part 20:
Aspirating smoke detectors
WARNING — Certain types of detectors contain radioactive materials. National requirements for
radiation protection differ from country to country and they are not, therefore, specified in this part of
ISO 7240.
1 Scope
This part of ISO 7240 specifies the requirements, test methods and performance criteria for aspirating smoke
detectors for use in fire detection and alarm systems installed in buildings.
Aspirating smoke detectors developed for the protection of specific risks that incorporate special
characteristics (including additional features or enhanced functionality for which this part of ISO 7240 does not
define a test or assessment method) are also covered by this part of ISO 7240. The performance
requirements for any special characteristics are beyond the scope of this part of ISO 7240.
2 Normative references
The following referenced documents
...
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