Reaffirmed 2018

NATIONAL FOREWORD

This Indian Standard (Part 15) which is identical with ISO 7240-15 : 2004 ‘Fire detection and alarm systems — Part 15: Point type fire detectors using scattered light, transmitted light or ionization sensors in combination with a heat sensor’ issued by the International Organization for Standardization (ISO) was adopted by the Bureau of Indian Standards on the recommendation of the Fire Fighting Sectional Committee and approval of the Civil Engineering Division Council.

Technical Corrigendum 1 published in 2005 to the above International Standard has been given at the end of this publication. However, in view of Technical Corrigendum 1, the title of the part of this standard has been changed.

This standard is published in various parts. Other parts in this series are:

Part 5 Point-type heat detectors

Part 7 Point-type smoke detectors using scattered light, transmitted light or ionization

Part 11 Manual call points

A fire detection and alarm system 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.

This standard for multisensor fire detectors describes requirements for different types of multisensor fire detectors.

This standard is formulated on the basis of functions which are required to be provided on all multisensor fire detectors covered by this standard, and optional functions with requirements which may be provided. It is intended that the options will be used for specific applications, as recommended in application guidelines.

Each optional function is included as a separate entity, with its own set of associated requirements, in order to permit multisensor fire detectors covered by this standard with different combinations of functions to conform to this standard. Other functions associated with fire detection and fire alarm may also be provided, even if not specified in this standard, if they do not jeopardize any function required by this document.

This standard is not intended to place any other restrictions on the design and construction of such detectors.

The text of ISO Standard has been approved as suitable for publication as an Indian Standard without deviations. Certain conventions are, however, not identical to those used in Indian Standards. Attention is particularly drawn to the following:

a) Wherever the words ‘International Standard’ appear referring to this standard, they should be read as ‘Indian Standard’.

b) Comma (,) has been used as a decimal marker while in Indian Standards, the current practice is to use a point (.) as the decimal marker.