43
systems is that those conforming to BS EN 50291 should not be used in such systems. CO detectors conforming to BS EN 50291 are only to be used for detecting the presence of CO potentially systems. However, this does not preclude dwelling. CO detectors conforming to BS EN 54-26 are permitted for use in Grade A systems conforming to BS 5839-6 and conforming to BS 5839-1. It is often the case that CO detectors
are incorporated within multi-sensor heat detectors conforming to BS ISO 7240-8 or BS EN 54-30 or multisensory smoke and heat detectors conforming to BS EN 54-31.
detectors are that they react more are immune to certain environmental factors which may affect smoke detectors, such as dust, steam and cigarette smoke. Maintenance is a key factor where CO
detectors are used. As the most common types utilise a chemical means of detection, it is important that the sensor or detector is changed every 7 years. Installation of CO detectors In domestic premises, CO detectors/ alarms should not be the sole means Clause 10.2e) of BS 5839-6 recommends that CO detectors, and multisensory detectors containing CO detection, are only used for Grade A systems where an annual maintenance regime exists, or where a fault warning is given to indicate the need to replace the electrochemical cell. Where CO detectors are used within
a circulation space, there should be an equal or higher number of smoke detectors within the circulation space (Clause 10.2f)). Furthermore, CO detectors should not be installed in kitchens. Clause 21 of BS 5839-1 details the types of detectors recognised for use within non-domestic premises. Clause 21.2g) details where CO detectors may be reasonably used: • Any area in which the use of a heat detector would be acceptable, other
WB231
than those areas where the principal • Rooms opening onto escape routes in Category L3 systems, • All escape routes within Category L3 and L4 systems, provided the CO detectors are used in conjunction with smoke detectors, shows that CO detectors offer adequate Conclusion Care should be taken in the selection and use of CO detectors when used
systems. CO detectors may be combined with heat and smoke detection in multisensory devices. However, even in non-domestic premises, their use should Whilst the CO detectors used for sensing carbon monoxide created by
Page 1 |
Page 2 |
Page 3 |
Page 4 |
Page 5 |
Page 6 |
Page 7 |
Page 8 |
Page 9 |
Page 10 |
Page 11 |
Page 12 |
Page 13 |
Page 14 |
Page 15 |
Page 16 |
Page 17 |
Page 18 |
Page 19 |
Page 20 |
Page 21 |
Page 22 |
Page 23 |
Page 24 |
Page 25 |
Page 26 |
Page 27 |
Page 28 |
Page 29 |
Page 30 |
Page 31 |
Page 32 |
Page 33 |
Page 34 |
Page 35 |
Page 36 |
Page 37 |
Page 38 |
Page 39 |
Page 40 |
Page 41 |
Page 42 |
Page 43 |
Page 44 |
Page 45 |
Page 46 |
Page 47 |
Page 48 |
Page 49 |
Page 50 |
Page 51 |
Page 52
