ISO 7240-22:2017
(Main)Fire detection and alarm systems — Part 22: Smoke-detection equipment for ducts
Fire detection and alarm systems — Part 22: Smoke-detection equipment for ducts
ISO 7240-22:2017 specifies requirements, test methods and performance criteria for smoke-detection equipment for ducts (SDED) for use in fire detection and alarm systems installed in buildings (see ISO 7240‑1). The SDED samples the air from a duct and detects smoke in the sample. NOTE 1 A common method of operation is to use differential pressure arising from airflow in the duct. The SDED can use smoke detectors complying with ISO 7240‑7 or other detectors complying with tests specified in ISO 7240-22:2017. A common application for SDED is to detect visible smoke, for which detectors using scattered light or transmitted light can be more suitable. However, requirements for detectors using ionization are also included in ISO 7240-22:2017 for use in applications where detection of less visible fire aerosols is desired. For the testing of other types of smoke detectors or smoke detectors working on different principles, ISO 7240-22:2017 can be used for guidance. Smoke detectors with special characteristics, developed for specific risks, are not covered. NOTE 2 Certain types of detectors contain radioactive materials. The national requirements for radiation protection differ from country to country and are not specified in ISO 7240-22:2017.
Systèmes de détection et d'alarme d'incendie — Partie 22: Équipement de détection des fumées dans les conduits
General Information
Relations
Standards Content (Sample)
INTERNATIONAL ISO
STANDARD 7240-22
Second edition
2017-09
Fire detection and alarm systems —
Part 22:
Smoke-detection equipment for ducts
Systèmes de détection et d'alarme d'incendie —
Partie 22: Équipement de détection des fumées dans les conduits
Reference number
ISO 7240-22:2017(E)
©
ISO 2017
---------------------- Page: 1 ----------------------
ISO 7240-22:2017(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2017, Published in Switzerland
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form
or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior
written permission. Permission can be requested from either ISO at the address below or ISO’s member body in the country of
the requester.
ISO copyright office
Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel. +41 22 749 01 11
Fax +41 22 749 09 47
copyright@iso.org
www.iso.org
ii © ISO 2017 – All rights reserved
---------------------- Page: 2 ----------------------
ISO 7240-22:2017(E)
Contents Page
Foreword .vi
Introduction .vii
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Requirements . 2
4.1 Compliance . 2
4.2 Visual alarm indication . 2
4.3 Connection of ancillary devices . 2
4.4 Monitoring of detachable detectors . 3
4.5 Manufacturer's adjustments . 3
4.6 On-site adjustment of response behaviour . 3
4.7 Requirements for software-controlled smoke-detection equipment for ducts . 3
4.7.1 General. 3
4.7.2 Software design. 3
4.7.3 Storage of programs and data . 3
5 Tests . 4
5.1 General . 4
5.1.1 Atmospheric conditions for tests. 4
5.1.2 Mounting arrangements . 4
5.1.3 Operating conditions for tests . 4
5.1.4 Tolerances . 4
5.1.5 Response threshold value . 4
5.1.6 Provision for tests . 5
5.1.7 Test schedule . 6
5.1.8 Test report . 6
5.2 Repeatability . 6
5.2.1 Object of test . 6
5.2.2 Test procedure . 6
5.2.3 Requirements . 7
5.3 Reproducibility . 7
5.3.1 Object of test . 7
5.3.2 Test procedure . 7
5.3.3 Requirements . 7
5.4 Variation in supply parameters . 7
5.4.1 Object of test . 7
5.4.2 Test procedure . 8
5.4.3 Requirements . 8
5.5 Dazzling . 8
5.5.1 Object of test . 8
5.5.2 Test procedure . 8
5.5.3 Requirements . 9
5.6 Dry heat (operational) . 9
5.6.1 Object of test . 9
5.6.2 Test procedure . 9
5.6.3 Requirements .10
5.7 Cold (operational) .10
5.7.1 Object of test .10
5.7.2 Test procedure .10
5.7.3 Requirements .11
5.8 Damp heat, steady-state (operational).11
5.8.1 Object of test .11
© ISO 2017 – All rights reserved iii
---------------------- Page: 3 ----------------------
ISO 7240-22:2017(E)
5.8.2 Test procedure .11
5.8.3 Requirements .11
5.9 Damp heat, steady-state (endurance) .12
5.9.1 Object of test .12
5.9.2 Test procedure .12
5.9.3 Requirements .12
5.10 Sulfur dioxide, SO , corrosion (endurance) .13
2
5.10.1 Object of test .13
5.10.2 Test procedure .13
5.10.3 Requirements .13
5.11 Shock (operational) .14
5.11.1 Object of test .14
5.11.2 Test procedure .14
5.11.3 Requirements .14
5.12 Impact (operational) .15
5.12.1 Object of test .15
5.12.2 Test procedure .15
5.12.3 Requirements .15
5.13 Vibration, sinusoidal (operational) .16
5.13.1 Object of test .16
5.13.2 Test procedure .16
5.13.3 Requirements .17
5.14 Vibration, sinusoidal (endurance) .17
5.14.1 Object of test .17
5.14.2 Test procedure .17
5.14.3 Requirements .18
5.15 Air leakage .18
5.15.1 Object of test .18
5.15.2 Test procedure .18
5.15.3 Requirements .18
5.16 Electromagnetic compatibility (EMC) immunity tests (operational) .19
5.16.1 Object of test .19
5.16.2 Test procedure .19
5.16.3 Requirements .19
5.17 Fire sensitivity .20
5.17.1 Object of test .20
5.17.2 Test procedure .20
5.17.3 Requirements .21
6 Test report .21
7 Marking .22
8 Data .22
8.1 Hardware documentation .22
8.2 Software documentation .23
Annex A (normative) Smoke tunnel and fire test room arrangement
for response measurements .24
Annex B (normative) Test aerosol for response threshold value measurements .25
Annex C (normative) Smoke-measuring instruments .26
Annex D (normative) Apparatus for dazzling test .30
Annex E (normative) Apparatus for impact test .31
Annex F (informative) Air-leakage test apparatus .33
Annex G (normative) Rapid smouldering (pyrolysis) wood fire (TF2).34
Annex H (normative) Open plastics (polyurethane) fire (TF4) .37
iv © ISO 2017 – All rights reserved
---------------------- Page: 4 ----------------------
ISO 7240-22:2017(E)
Annex I (informative) Information concerning the construction of the smoke tunnel .39
Annex J (informative) Information concerning the construction of the measuring
ionization chamber .42
Bibliography .44
© ISO 2017 – All rights reserved v
---------------------- Page: 5 ----------------------
ISO 7240-22:2017(E)
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.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).
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. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www.iso.org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation on the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to the
World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following
URL: www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 21, Equipment for fire protection and fire
fighting, Subcommittee SC 3, Fire detection and alarm systems.
This second edition cancels and replaces the first edition (ISO 7240-22:2007), which has been
technically revised.
The main changes compared to the previous edition are as follows:
— in 5.16 (electromagnetic compatibility immunity tests), EN 50130-4 has been replaced by
IEC 62599-2;
— marking has been moved to a new Clause 7;
— data and software requirements have been moved to Clause 8.
A list of all parts in the ISO 7240 series can be found in the ISO website.
vi © ISO 2017 – All rights reserved
---------------------- Page: 6 ----------------------
ISO 7240-22:2017(E)
Introduction
Smoke-detection equipment for ducts (SDED) is used as part of a fire detection system to sample the
environment within air ducts of a building. Detection of smoke releases a signal to the connected
control and indicating equipment and can be used as a signal to an air-handling system to prevent the
spread of smoke within the building.
SDED is required to function satisfactorily not only in the event of a fire, but also during and after
exposure to conditions likely to be met in practice such as corrosion, vibration, direct impact, indirect
shock and electromagnetic interference. Some tests specified are intended to assess the performance of
the SDED under such conditions.
The performance of SDED is assessed from results obtained in specific tests. This document is not
intended to place any other restrictions on the design and construction of such equipment.
© ISO 2017 – All rights reserved vii
---------------------- Page: 7 ----------------------
INTERNATIONAL STANDARD ISO 7240-22:2017(E)
Fire detection and alarm systems —
Part 22:
Smoke-detection equipment for ducts
1 Scope
This document specifies requirements, test methods and performance criteria for smoke-detection
equipment for ducts (SDED) for use in fire detection and alarm systems installed in buildings (see
ISO 7240-1).
The SDED samples the air from a duct and detects smoke in the sample.
NOTE 1 A common method of operation is to use differential pressure arising from airflow in the duct.
The SDED can use smoke detectors complying with ISO 7240-7 or other detectors complying with tests
specified in this document.
A common application for SDED is to detect visible smoke, for which detectors using scattered light or
transmitted light can be more suitable. However, requirements for detectors using ionization are also
included in this document for use in applications where detection of less visible fire aerosols is desired.
For the testing of other types of smoke detectors or smoke detectors working on different principles,
this document can be used for guidance. Smoke detectors with special characteristics, developed for
specific risks, are not covered.
NOTE 2 Certain types of detectors contain radioactive materials. The national requirements for radiation
protection differ from country to country and are not specified in this document.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 209, Aluminium and aluminium alloys — Chemical composition
ISO 7240-1, Fire detection and alarm systems — Part 1: General and definitions
ISO 7240-7:2011, Fire detection and alarm systems — Part 7: Point-type smoke detectors using scattered
light, transmitted light or ionization
IEC 60068-1, Environmental testing — Part 1: General and guidance
IEC 60068-2-1, Environmental testing — Part 2: Tests. Tests A: Cold
IEC 60068-2-2, Environmental testing — Part 2: Tests. Tests B: Dry heat
IEC 60068-2-6, Environmental testing — Part 2: Tests — Test Fc: Vibration (sinusoidal)
IEC 60068-2-27, Environmental testing — Part 2: Test Ea and guidance: Shock
IEC 60068-2-42, Environmental testing — Part 2-42: Tests. Tests Kc: Sulphur dioxide tests for contacts and
connections
IEC 60068-2-78, Environmental testing — Part 2-78: Tests — Test Cab: Damp heat, steady state
© ISO 2017 – All rights reserved 1
---------------------- Page: 8 ----------------------
ISO 7240-22:2017(E)
IEC 62599-2, Alarm systems — Part 2: Electromagnetic compatibility — Immunity requirements for
components of fire and security alarm systems
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 7240-1 and the following apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at http://www.electropedia.org/
— ISO Online browsing platform: available at http://www.iso.org/obp
3.1
response threshold value
A
th
aerosol density in the proximity of the specimen at the moment that it generates an alarm signal, when
tested as specified in 5.1.5
Note 1 to entry: The response threshold value may depend on signal processing in the detector and in the control
and indicating equipment.
4 Requirements
4.1 Compliance
In order to comply with this document, the SDED shall:
a) meet the requirements of Clause 4, which shall be verified by visual inspection or engineering
assessment;
b) be tested as specified in Clause 5, and shall meet the requirements of the tests;
c) meet the requirements of Clauses 7 and 8, which shall be verified by visual inspection.
4.2 Visual alarm indication
4.2.1 Each SDED shall be provided with a red visual indicator, by which the SDED can be identified
when the associated detector releases an alarm and which remains illuminated until the alarm condition
is reset. Where other conditions of the SDED can be visually indicated, they shall be clearly distinguishable
from the alarm indication, except when the SDED is switched into a service mode. The alarm indicator
may be the smoke detector indicator provided the indicator is visible when the detector is in situ as part
of the SDED.
4.2.2 The visual indicator shall be visible from a distance of 6 m in an ambient light intensity up to
500 lx at an angle of up to
a) 5° from the axis of the detector in any direction, and
b) 45° from the axis of the detector in at least one direction.
4.3 Connection of ancillary devices
The SDED may provide for connections to ancillary devices (remote indicators, control relays, e
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.