【 Weak current College 】 automatic fire alarm system is set, the acceptance and maintenance---Power By 【 China power house network 】

Automatic fire alarm system is set in the building automation very high fire control system of early detection. Fire detector is an automatic fire alarm system of core components, it is an automatic fire detection system sensor, can produce and issue a fire alarm signal on site, or to control and indicating equipment onsite fire status signal devices. Therefore, you can graphically that fire detectors for "fire sentry", its status is good or bad will have a direct impact on the entire run of disaster prevention system.
　　
　　
At present, major architecture and public places in the number of the installed automatic fire alarm system to prevent fires from occurring, but in actual use exposed issues have become increasingly prominent. On the one hand, the production of automatic fire alarm system manufacturers, its products, the actual quality uneven phenomenon is actually used prominently in the false alarm rate and relatively high failure rate, after-sales maintenance service is not timely or not perfect, so that the installed fire-fighting equipment to fire alarm function; on the other hand, some use units of fire awareness among managers, do not attach importance to the automatic fire alarm system of the application, use and maintenance.
　　
　　
The Ministry of public security with the relevant departments to jointly developed by the automatic fire alarm system construction and acceptance not only for the installation sector provides a nationally consistent scientific and reasonable technical standards, but also for fire departments to provide a positive basis for planning and management of technology. This specification establishes automatic fire alarm system of construction must be under the supervision of public security fire agencies, the system must pass before the delivery of public security and fire fighting supervisory body acceptance.
　　
　　
I combine their actual work and learning experience, the setting of the fire detectors, acceptance and maintenance of the discussion as follows:
　　
　　
1. set the detector's considerations
　　
　　
(A) shall conform to the automatic fire alarm system design specifications "and the relevant national standards and norms;
　　
　　
(Ii) on the set of probes to understand its rationale, the arrangement should be made to meet scientific and reasonable, safe and reliable, easy to properly check, inspection and maintenance, repair, use the inconvenience of the Forum (except for the important parts) or cannot effectively detecting fire place (such as toilets, bathrooms, etc.) may not fire detectors;
　　
　　
(3) if the detector set location did not grasping, necessary for the simulation test to finalize the installation location or consider other fire protection measures;
　　
　　
(4) set the detector should avoid false positives, specific attention should be paid to the following aspects:
　　
　　
1. thermal detectors should not be installed because of natural causes such as heat or work, the surrounding temperature easily reach the detector's environment caused by false positives. Therefore, the installation should pay attention to avoid probe directly accept the possibility of solar radiation, consideration should be given to the field of possible to emit thermal radiation, hot air or steam equipment and to take precautions in advance.
　　
　　
2, in the air flow of low room, flying dust easily accessible due to false in the smoke detector. In this case, the response detectors take additional protective measures, such as the use of appropriate shielding for special installation.
　　
　　
3. in the course of producing smoke or similar aerosol can result in malfunction detector. Therefore, you should be careful not to smoke detectors installed in the possible aerosol concentration of workplaces and equipment parts.
　　
　　
4, infrared beam smoke detector should avoid strong light or Infrared Illuminator function, installation of transmitter and receiver must be fixed, not to loose, at the same time avoid violent vibration, in the beam axis should avoid fixed block and flow occluder.
　　
　　
5. flame detector due to external interferences that can cause a false positive, it is necessary to take measures, such as installing shutters or guard, protect from interference light flame detector.
　　
　　
2. fire detectors of acceptance considerations
　　
　　
Automatic fire alarm system shall, in accordance with national laws and regulations of the present, with the qualification of the fire detection system of intermediaries to system performance testing, test data report, to the local police and fire agencies, the competent authorities to draw the acceptance. Automatic fire alarm system of acceptance shall be conducted in public security and fire fighting supervisory body under the supervision of the construction units, design, construction, commissioning, and other units are joined.
　　
　　
In acceptance, construction unit should fire supervision agencies submit acceptance declaration form, and attach the following technical papers: 1, system completed table; 2, system completion chart; 3, construction records (including hidden works acceptance record); 4, debug reports; 5, management, maintenance personnel registration form. Acceptance, firefighting supervisory bodies should carry out construction quality review, review of the main content is fire detector type, model number, location, installation height, protection RADIUS, protection area and detector spacing, etc.
　　
　　
In acceptance, the following requirements for simulation of fire response test and fault alarm sampling:
　　
　　
(A) the number of actual installation in 100 persons only, the sampling 10, more than 100 actual installation, install only the actual number of 5% to 10%, but not less than 10 sampling;
　　
　　
(B) of the detector should be can't output a fire signal and alarm controller displays the location should be and the detector installation location;
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(C) the detector installation quality should meet the following requirements:
　　
　　
The actual installation of probes, installation location, and so should meet the design requirements; detector around 0.5 m range should not be screened for detector centre distance wall, horizontal distance beam edges should be less than 0.5 m; detector Centre to the edge of the air conditioning air horizontal distance of not less than 0.5 m, from porous air ceiling orifice horizontal distance not less than 0.5 m; detector distance fan NET distance not less than 1.5 m, distance from the sprinkler system of the nozzle is not less than 0.3 m; on fire shutter, electric fire doors up the linkage effects of detectors should be installed at a distance of fireproof roller doors, fire doors 1 ~ 2 m where appropriate; detector in widths smaller than 3 m in the aisle ceiling on settings in the layout, livable heat detector spacing should not exceed 10 meters, smoke detector installation spacing should not exceed 15 meters, detectors, the distance from the end wall should not be greater than one half of the detector installation spacing; probe protection RADIUS and beam side effect of the detector should meet standard requirements; probe confirmation lights should be oriented to facilitate staff observed main entrance direction; detector tilting installation angle should not be greater than 45 degrees; detector base external conductors should have not less than 15 cm.
　　
　　
3. maintenance of the late
　　
　　
The system has been tested and qualified to deliver the user during use should be entrusted with the appropriate qualification and maintenance of fire property management company to conduct maintenance. Concrete should be from the following areas do maintenance work:
　　
　　
(A) shall establish a complete system of on-duty officers on duty should fill the registration form of the detector, checked and quarter (years) to check the registration form;
　　
　　
(B) the annual applying specialized testing equipment to detect the installed detectors;
　　
　　
(3) fire detectors put into operation two years later, every three years all cleaning again, and repeat response thresholds and other necessary functions test, candidates may continue to use, not qualified to reinstall the use is strictly prohibited