IS/ISO 7240 : Part 15 : 2014 Fire Detection and Alarm Systems - Part 15 Point-Type Fire Detectors Using Smoke and Heat Sensors
NATIONAL FOREWORD
This Indian Standard (Part 15) (First Revision) which is identical to ISO 7240-15 : 2014 'Fire detection and alarm systems - Part 15: Point-type fire detectors using smoke and heat sensors' 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.
This standard was first published in 2013 as IS/ISO 7240-15 : 2004. The revision has been undertaken to align it with the latest version of ISO 7240-15 to make pace with the latest international practices.
This Indian Standard is published in various parts. The other parts in this series are:
| Part 2 | Fire detection 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 | Point-type fire detectors using a carbon monoxide sensor in combination with a heat sensor |
| 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 16 | Sound system control and indicating equipment |
| Part 17 | Transmission path isolators |
| Part 18 | Input/output devices |
| Part 20 | Aspirating smoke detectors |
| Part 21 | Routing equipment |
| Part 22 | Smoke-detection equipment for ducts |
| Part 23 | Visual alarm devices |
| Part 24 | Fire alarm loudspeakers |
| Part 25 | Components using radio transmission paths |
| Part 27 | Point-type fire detectors using a smoke sensor in combination with a carbon monoxide sensor and, optionally, one or more heat sensors |
| Part 29 | Video fire detectors |
| Part 31 | Resettable line-type heat detectors |
Point-type fire detectors using smoke and heat sensors are general purpose fire detectors for installation in and around buildings. Multi-sensor detectors respond to a broad range of fires and can be designed to achieve high stability against deceptive phenomena that can result in unwanted alarms.
A fire detection and alarm system are required to function satisfactorily not only in the event of fire, but also during and after exposure to conditions it is likely to meet in practice, including corrosion, vibration, direct impact, indirect shock and electromagnetic interference. Specific tests are intended to assess the performance of detectors under such conditions.
This revision introduces a requirement that smoke sensors that operate on the principle of scattered or transmitted light to be marked with one of two possible nominal response threshold bands. The availability of two of response threshold bands provides installation designers with a detector selection choice to further reduce the risk of unwanted alarms in installations where unfavourable environmental conditions are present.
This revision introduces additional requirements for smoke detectors with more than one smoke sensor.
The text of ISO standard has been approved as suitable for publication as an Indian Standard without deviations. Certain conventions and terminologies 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'; and
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.