【 Weak current College 】 automatic fire alarm system maintenance

1 smoke detector for source, cleaning and electrical parameter adjustment
In the early stage of fire, fire detector promptly detected fire information delivered to the fire alarm host, host issue a sound and light alarm signal and interlocking fire facilities, ensure the functioning of the detector is essential. Point of the type smoke detectors are divided into ion sensing smoke and photoelectric smoke two classes, ion sensing smoke detector with radioactive sources, if handled inappropriately will pollute the environment, so in recent years manufacturers basically to producing photoelectric smoke detector. But currently using detectors Ionic smoke detector also possess considerable proportion. The Ministry of public security under People's Republic of China automatic fire alarm system construction and acceptance (GB50166-92), the detector running 2 years later, every three years all cleaning again. To Ion Detector, for example, the air of dust sticking radioactive sources and ionization chamber of the surface, the ionization chamber weakened, in ion flow detector easy to false positives, at the same time the air moisture and dust will also slow corrosion of radioactive sources, and if the ionization chamber of radioactive sources was corrosion than reference room of radioactive sources, will cause the detector easy to false positives. On the contrary, to slow or no alarm alert. In addition the parameter in the electronic detector drift or neglect, the detector shall after cleaning for electrical parameter calibration adjustments. Probe cleaning of English words are "Overhaul", translated as "overhaul", is about to change the source, the detector after cleaning, electricity, parameter adjustment, its index reached a new detector is factory-indicators. So in order to guarantee the long-term functioning of the detector will probe sent to professional cleaning factory regular overhaul is necessary.
2 clean fire alarm controller, power backup and security software
2.1 fire alarm controller in long-term use, there will be a lot of dust absorption in fire alarm controller circuit board, the dust is too much affect circuit cooling, in humid circumstances there may short circuit, so regular cleaning alarm control machine is necessary.
2.2 large renovation of local decoration inside the building, the fire alarm control machine user software changes a lot, some manufacturers of control machines rely on lithium battery save user software, lithium battery failure and alarm control machine power off (there are other reasons, such as misuse, card damaged, etc), resulting in loss, recovery software control machine software job is tedious, so regular backups of user software is very important.
Failure of the main electrical 2.3, backup battery ensures control of the machine at one time, continue to work. Battery general use of maintenance-free batteries, their life is 3-5 years, it should be regularly use a dedicated battery Tester test battery, the timely replacement of battery failure, ensure that the fire control computer safe power supply.
3 detectors with smoke test
In large buildings in probe number detector testing generally use sampling, sampling should note the following aspects:
3.1 tested detectors do address records, so that the next phase of the test repeated test the same point. Within one year after the adoption of several stage test will test all of the detector.
3.2 in smoke testing process, dealing with the degree of retardation detector alarm record to the adoption of the final total for the entire building probes for operation with an overview of the cleaning of the detector to provide supporting evidence.
3.3 testing should verify the accuracy of the address. A unit of fire protection system has been running for six years, and have a room alarm, alarm control machine displayed is the addresses the next room, visible check alert addresses the importance of.
4 prevention and exhaust system examination and functional testing
Anti, exhaust system by positive pressure ventilation valve, exhaust valve, air duct, fire-fighting fans, positive pressure ventilation is blocked flue gas into the evacuation zone, and the exhaust system is smoke emission buildings, is the evacuation of important guarantee.
4.1 first observation of the valve closure is tight, heavy body close strictly will have an impact on the exhaust gas or air. Detector alarm linkage is opened after the valve should be open, you should promptly repaired to prevent fires body open angle not enough or does not open, the more common, it is generally the quality of the valve is not very good, or improper installation, the repair process should pay attention.
4.2 valve action, check the return fire control room, at the same time should be able to signal joint fire fan starts. Because of a typhoon machine for multiple valve use, respond to each body movements linked to check the fan, which is often overlooked, a unit of fire protection system has been running for years, the test in the exhaust valve was still found to open after the fan does not start, according to the valve linkage fan programs were not prepared. In a large, fire-fighting system, due to the large amount of user software, debugging staff neglect these phenomena is possible, therefore, in the maintenance and repair work to be careful to achieve the purpose of perfecting the system.
4.3 on fire test in addition to automatic blower function, you should test the fire Centre of remote boot capabilities, as well as the site of the fan control cabinet, while starting the function should check the return signal.
5 fire shutter doors and fire doors of functional testing
Fireproof roller doors and fire doors is to prevent the spread of smoke and fire separation device.
5.1 evacuation channel fire shutter should have half drop and all drop function for fireproofing fire shutter in detector alarm after one step test should be able to meet the above requirements and check return signal address. Fire shutter movements should note that their decline is stable, there is no congestion, base is tight.
5.2 fire door starts, it should be noted that two doors are shut down by the order.
6 fire alarm and fire broadcasting of functional testing
Building each layer usually has multiple alarm or speakers. The tests should not be able to hear sound, but should ensure that each alarm or speakers are working properly.
7 fire water system functional testing
The end of the water by 7.1 test flow indicator, fire hydrant Kai pump button should also test to test each year all over again.
7.2 fire pumps have three starts, pump control cabinet spot start, auto-start, fire control, remote start. The above three ways shall be tested, and check the return address of the signal.
8 optizone improve dimensional quality
As people gradually enhanced awareness of fire, the fire system maintenance work more and more importance to many units will fire system maintenance work contracted out to qualified fire company. Maintenance service of quality to the entire building's fire safety, the author of this on the comments.
8.1 automatic fire alarm equipment, intelligent and software technology, maintenance companies own unfamiliar equipment should first contact with the manufacturers to obtain technical support, while ensuring the supply of spare parts.
Start the repair work 8.2 that prior to the fire in the entire building facilities good overview, the skills of fire-fighting equipment of linkage, so as to avoid adverse consequences. If a hotel fire fan starts, you must to wind the engine room scene stopped fan, and maintenance staff did not grasping the situation, fan interaction cannot be stopped so that large amounts of dust blown into the stairwell.
8.3 maintenance work unable to "repair" light "-", only to repair the failed device. In fact, the role of maintenance, it is also important to eliminate potential risk. If a repair should check fan, water pump, etc. of strong electric control cabinet, the aging of the devices are maintained or replaced in a timely manner. The tests also often encountered as a result of the aging equipment devices will not work properly.
8.4 system running longer, line aging and bad problem. Should pay attention to the alarm and control line maintenance, particularly in the terminal box is checked, the focus should be to eliminate risk. A unit of service personnel check the total terminal box, found more than 1000 on line there are 40 line already loose. Test pump, control cabinet of 24V DC relay only start voltage 16V, the relay is not the action. According to the second floor of the wells in the ground floor of the terminal box due to wet a large number of Terminal rust, junction resistive voltage attenuation caused by increased, this shows the importance of the line maintenance.

Current fire facilities maintenance work has not been uniform, the fire company or organization's maintenance program and emphasis. Hope that we can communicate with each other, learn from each other, will fire maintenance work even better.