Testing & Maintenance, False Alarms

•Do not locate unit within 1m of dimmer controlled lights and wiring - some dimmers can cause interference

•Do not wire into the same circuit as a dimmer

•Do not locate unit within 1.5m, or route wiring within 1m of fluorescent light fittings as electrical “noise” and/or flickering may affect the unit. Do not wire into the same circuit as a fluorescent light

•Do not locate ceiling mounted units within 30cm of walls or corners

•Do not locate near very dusty or dirty areas, as dust build-up in the chamber can make the unit too sensitive and prone to false alarm

•Do not locate in insect infested areas. Small insects getting into the chamber can cause intermittent alarms

TESTING & MAINTENANCE

Minimum monthly, recommended weekly

(i)Check that the green mains indicator light is on (if it is off check circuit breakers, fuses and wiring)

(ii)Press the test button for at least ten seconds to ensure that the smoke chamber, electronics and sounder are working and that all the alarms that are interconnected are sounding. A red light behind the test button, or on the cover will flash rapidly while the horn is sounding. The alarm will stop soon after the button is released. Do not test with a flame or smoke

(iii)Check for any sign of contamination such as cobwebs or dust. Smoke alarms must be cleaned regularly. This is particularly true of optical alarms, and alarms placed in dusty areas. Use the narrow nozzle attachment of a vacuum cleaner to remove dust,

insects or cobwebs from the sides and cover slots where the smoke enters. Turn off the mains and wipe the cover with a damp cloth. Dry cover thoroughly with a lint free cloth. Other than the cleaning described, no other customer servicing of the product is required. Repairs, when needed, must be carried out by the manufacturer

(iv)Check the battery annually. Refer to the specific user instructions

(v)Protect the alarm with the dust cover supplied when any renovation work or redecoration is being carried out. Remove the cover immediately when all work is completed as the alarm will not function correctly with the cover in place. Alternatively, with ‘Easi-fit’ style alarms, simply remove the detector head in the advised manner

(vi)Do not paint an alarm or allow paint to contaminate it when decorating

FALSE ALARMS

These can best be minimised by the careful selection, siting and maintenance of alarms. It is a good idea to specify alarms with a ‘hush’ (false alarm control) button to temporarily silence false alarms from cooking vapours, steam or excessive tobacco smoke, for example. This facility will also help to reduce the risk of users attempting to disable the alarm by, for example, removing the battery or tampering with the mains.

LIMITATIONS OF SMOKE ALARMS

•Smoke alarms will not detect a fire if sufficient smoke does not

reach the alarm. Smoke may be prevented from reaching the alarm if the fire is too far away or if the fire is behind a closed door, in a chimney or wall cavity for example, or if prevailing draughts carry the smoke away

•Installing smoke alarms in every room, or a heat alarm in areas where a smoke alarm is not suited, will very significantly improve the probability of early fire detection

•The alarm may not be heard. Once installed in its intended location you should check that you can hear the alarm even with the door closed; this is particularly important to test in the bedroom. If it cannot be heard, install more alarms. Remember mains powered alarms must be interconnected

•Smoke alarms may not detect every type of fire early enough. As stated earlier, ionisation alarms and optical alarms respond differently to the different types of fire. Fire caused by escaping gas, violent explosions or poor storage of flammable liquids can spread too quickly for a smoke alarm to give an early warning

•A heat alarm will not sense smoke and will only trigger when the ambient temperature reaches the range 54°C to 62°C

•Smoke and heat alarms do not last indefinitely. For example, a build up of contamination can cause false alarms, more so in the case of optical smoke alarms. Over a period, depending upon the conditions, the electronic components will degrade. For these reasons, all manufacturers recommend regular testing and replacement after no more than ten years

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