Fire alarms automatic

In the event of fire within a building, the controller for each elevator should isolate all manually operated inputs and return automatically to the evacuation level, usually the ground floor. An output from the building fire alarm panel is hard wired to the elevator controller, giving the signal for a fire condition. The elevator remains disabled at the evacuation level and the car doors open. If a fire officer requires control of a elevator a key switch or break-glass unit should be used to re-activate the elevator. 

Wet or dry chemical fixed suppression systems are typically provided over the kitchen cooking appliances and in exhaust plenums and ducts. Activation means is afforded by fusible links located in the exhaust ducts/plenums usually rated at 232°C (450°F). Manual activation means should not be provided near the cooking area, but in the exit routes from the facility. The facility fire alarm should sound upon activation of the fixed suppression system and power or gas to the cooking appliances should be automatically shut off. The ventilation system should also be shut down by the activation of the fire alarm system. Protective caps should be provided on the suppression nozzles to prevent plugging from grease or cooking particulates. 

If there were a total of 874 automatic fire alarms reported in this year, how many of them were the result of an alarm malfunction ... 

Based on the information in the chart, what would be the most effective area for the fire department to concentrate its efforts to educate the public to reduce the total number of automatic fire alarms ... 

The presence of a trench/pipe system in Option B, used to remove rain accumulations, increases the risk that contaminated fire water might be inadvertently discharged into the sanitary sewer system. In order to reduce this risk, it is necessary to install a motorized valve in the drainage piping. This valve could be arranged to close automatically in the event of a fire through a signal from the fire alarm panel and manually as needed. It may also be desirable to use a valve which will automatically close in the event of loss of power. Alternatively, this valve could be normally closed and opened when needed. 

Powered ventilation systems in chemical warehouses are typically used for some flammable gas and liquid storage areas (see Gas and Vapor Control, Section 6.6). Heating and ventilation systems and powered roof exhaust systems can be arranged to shut down automatically upon receipt of a fire alarm signal so as not to interfere with sprinkler system operations due to airflow. Furthermore, these systems can also be arranged for manual starting and full exhaust by the fire department for smoke removal during search and rescue operations. 

NFPA 45, 4.1-4.6 4.3.3 All laboratory units shall be provided with fire protection appropriate to the fire hazard, including automatic fire extinguishing systems, standpipe and hose systems, portable fire extinguishers, fire alarm systems, fire prevention programs, and emergency plans. 

Some of the more common engineering controls are fire alarms and detection systems, toxic gas alarms and detection systems, redundant alarms and shutdown devices, automatic shutdown devices, and process containment systems. 

Only in exceptionally hazardous locations can an automatic fire alarm system be justified, but a manual system with break-glass buttons would be appropriate for all but the smallest installations and, since solvent fires can spread very rapidly, the manual system should be connected directly to the fire station. Standing orders should make it obligatory for the fire brigade to be called as soon as all but the most trivial fire is found in the solvent area. 

A number of relatively small power-accumulator systems are included as parts of the equipment to which they provide power. Equipment having these systems includes the automatic dial and conference telephone system, the security and fire-alarm system, radio installations, and engine-starting systems. 

Every laboratory facility should be equipped with at least a manually activated alarm system, although an automatic system is preferable since it wiU continue to function when the facility is unoccupied. Automatic alarms are especially useful in academic institutions since there are break periods when the population of the campus is very low. In many cases, depending upon local code requirements and the occupancy classification, an automatic fire alarm system may be required rather than optional. Every component of a system should be approved by Underwriters Laboratories, the Factory Mutual System, or other nationally recognized accrediting and testing organizations. 

Automatic fire-alarms detect any fire by sensing... 

The B6580/81 automatic sprinkler system also sen/es the HCF. Standard spray automatic sprinklers are provided in occupied areas of the basement, including Rooms 100,104,105,106, 107, 111, 112,113,113Aand114. The HCF is equipped with an independent fire-alarm control panel, located against the south end of the west wall of Room 107 that monitors all areas of the HCF. Water that may be released during fires is captured and routed to holding tanks. This capture system is described in Section 2.9.5. Any sprinkler-water flow will activate the TA-V... 

Heat sensors and/or smoke detectors may be part of the building safety equipment. If designed into the fire alarm system, they may automatically sound an alarm and call the fire department, they may trigger an automatic extinguishing system, or they may only serve as a local alarm. Because laboratory operations may generate heat or vapors, the type and location of the detectors must be carefully evaluated in order to avoid frequent false alarms. 

A signal indicating an emergency requiring an immediate action, such as an alarm for fire from a manual fire alarm box, a fire sprinkler system waterilow alarm, toxic or combustible gas detection, or an alarm fiom an automatic detection system. 

A control system for receiving fire alarm signals and initiating actions to highlight conditions (alarms and beacons) or institute actions to automatically activate fire protective systems (i.e., fire pump startup, HVAC shutdown, etc.). The fire alarm... 

If volume of traffic requires them to be open, retain in open position by automatic device which releases when fire alarm activated... 

However, some buildings do not automatically shut off hoods when a fire alarm sounds. Nevertheless, you must be aware that if the alarm does go off and you are working in a hood that the hood may shut down so that it is no longer providing protection. If you can safely close your hood and immediately leave the laboratory and building, then do so. 

OSHA deals with fire protection from an employee safety standpoint, and many of the points covered in the OSHA standard are solid management practices for property safety as well. Subpart E, Means of Egress, is taken from NFPA 101-1970, the Life Safety Code. The emphasis of this subpart is on protecting the employee once a fire has started. It informs the employer what to do to protect workers during the fire by addressing egress methods, automatic sprinkler systems, fire alarms, emergency action plans, and fire prevention plans. 

Automatic fire alarms of various types can be fitted which operate when a fire is detected. These have the advantage of raising the alarm in the event of fire in unmanned or unoccupied locations. Their setting can be critical to prevent spurious operation. 

A display panel should be installed for both electrical and automatic fire alarms which shows the location of the alarm that has been initiated. Weekly tests should be made of the fire alarm so that people become familiar with the sound and so that any faults in the system can be detected and corrected. The fire alarm installation must be inspected and maintained on a regular and routine basis and a record made of all tests and inspections. This record should also include details of any faults, repairs and replacements. Inspections of the system should be carried out quarterly by a competent person. In high fire risk areas, serious consideration should be given to installing an automatic link from the display panel to the local fire brigade. 

BS 3116 Automatic fire alarms in buildings Part 1 1970 Heat sensitive (point) detectors Part 4 1974 Control and indicating equipment BS 4422 Glossary of terms associated with fire Part 1 1969 The phenomenon of fire Part 2 1971 Building materials and structures Part 3 1972 Means of escape Part 4 1975 Fire protection equipment Part 5 1976 Miscellaneous terms BS 4547 1972 Classification of fires... 

---