System Sensor Limitations of Fire Alarm Systems (Spanish)

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Limitations of Alarm Systems recommends that smoke and or heat detectors be throughout a protected premise following the rec of the current edition of the National Fire Association Standard 72 National Fire Alarm Code 72 manufacturer recommendations state provincial local codes and the recommendations contained in Guide the Proper Use of System Smoke Detectors which is made at no charge to all installing dealers In Canada refer CAN ULC S524 Standard for the Installation Of Fire Systems A study by the Federal Emergency Manage Agency an agency of the United States government that smoke detectors may not go off or give early in as many as 35 of all While alarm are designed to provide warning against they do guarantee warning or protection against Any alarm is subject to compromise or failure to warn for a variety reasons For example Particles of combustion or from a developing not reach the sensing chambers of the smoke detector Heat detectors do not sense particles of combustion and designed to alarm only when heat on their sensors in at a predetermined rate or reaches a predetermined Heat detectors are designed to protect property not Warning devices including horns sirens and bells may alert people or wake up sleepers who are located on other side of closed or partially open doors A warn device that activates on a different or level of dwelling or structure is less likely to awaken or alert Even persons who are awake may not notice the if the alarm is muf by noise from a stereo air conditioner or other appliance or by passing Audible warning devices may not alert the hearing strobes or other devices should be provided to these people Any warning device may fail to alert with a disability deep sleepers people who have used alcohol or drugs or people on medication sleeping pills Please note that Barriers such as closed or partially closed doors walls chimneys may inhibit Smoke particles may become and stratify and not reach the ceiling or upper walls where detec are located Smoke particles may be blown away from detectors by Smoke particles may be drawn into air returns before outlets the detector Strobes can under certain circumstances cause in people with conditions such as epilepsy Studies have shown that certain people even when hear a alarm signal do not respond or the meaning of the signal It is the owner responsibility to conduct drills other training exercises to make people aware alarm signals and instruct on the proper to alarm signals general smoke detectors on one level of a structure cannot expected to sense developing on another level In rare instances the sounding of a warning device cause temporary or permanent hearing loss The amount of present may be insuf to alarm detectors Smoke detectors are designed to alarm at levels of smoke density If such density levels are created by a developing at the location of detectors detectors will not go into alarm Smoke detectors even when working properly have sens limitations Detectors that have photoelectronic sensing tend to detect smoldering better than which have little visible smoke Detectors that have sensing chambers tend to detect fast better than smoldering Because develop in ways and are often unpredictable in their growth type of detector is necessarily best and a given type detector may not provide adequate warning of a Smoke detectors are subject to false alarms and nuisance For example a smoke detector located in or near a may go into nuisance alarm during normal operation kitchen appliances In addition dusty or steamy environ may cause a smoke detector to falsely alarm If the of a smoke detector causes an abundance of false or nuisance alarms do not disconnect the smoke call a professional to analyze the situation and a solution Smoke detectors cannot be expected to provide adequate of caused by arson children playing with especially within bedrooms smoking in bed explosions caused by escaping gas improper storage materials etc Telephone lines needed to transmit alarm signals from premises to a central station may be out of service or out of service For added protection against line failure backup radio transmission systems recommended System components though designed to last many years fail at any time As a precautionary measure it is rec that smoke detectors be checked maintained replaced per manufacturer recommendations System components will not work without electrical If system batteries are not serviced or replaced they may not provide battery backup when AC fails Environments with high air velocity or that are dusty or require more frequent maintenance general alarm systems and devices will not work power and will not function properly unless they maintained and tested regularly installing a alarm system may make the owner for a lower insurance rate an alarm system is not a for insurance Property owners should continue act prudently in protecting the premises and the people the premises and should properly insure life and property buy suf amounts of liability insurance to meet needs and recommendations proper use of fire alarm systems devices detection is best achieved by the installation maintenance of detection equipment in all rooms areas of the house or building in accordance with the and recommendations of the current edition the National Fire Protection Association Standard 72 Fire Alarm Code NFPA 72 the manufacturer state provincial and local codes and recommendations contained in Guide for the Proper of System Smoke Detectors which is made available no charge to all installing dealers In Canada refer to Standard for the Installation Of Fire Systems For speci requirements check with the Authority Having Jurisdiction ex Fire Chief for systems and Recommendations include For residential applications smoke detectors shall be outside of each separate sleeping area in the im vicinity of the bedrooms and on each additional of the family living unit including basements and crawl spaces and un attics Smoke detectors shall be installed in sleeping rooms in new and it is recommended that they shall also be in sleeping rooms in existing construction It is recommended that more than one smoke detector shall installed in a hallway if it is more than 30 feet long It is recommended that there shall never be less then two detectors per apartment or residence It is recommended that smoke detectors be located in any where an alarm control is located or in any room alarm control connections to an AC source or phone are made If detectors are not so located a within room could prevent the control from reporting a System Installations per NFPA 72 All alarm systems require noti devices includ sirens bells horns and or strobes In residential each automatic alarm initiating device when shall cause the operation of an alarm noti that shall be clearly audible in all bedrooms over or background noise levels at least 15dB above with all intervening doors closed It is recommended that a smo

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