About how to install fire alarm system
Installation of automatic fire alarm system,automatic fire alarm system is a set of devices that have the task and alarm when a fire occurs. The detection of fire signals can be done automatically by equipment or by direct human impact and must be operated 24/24h.
I. SYSTEM OVERVIEW
Typical components of a fire alarm system.
– Fire alarm center: designed in the form of a cabinet including main components such as control mainboard, modules, a transformer and 01 battery
– Input devices include smoke detectors, heat detectors, gas detectors, fire alarms and emergency buttons.
– Output devices: Secondary display board (keyboard), alarm bell, siren, alarm light, exit light, automatic phone dialer…
– The operating principle of the fire alarm system is a closed process, when there is a phenomenon of fire such as: sudden temperature rise, the appearance of smoke or sparks, etc., the detector signals are received and transmitted. signal to the fire alarm center. Here the center will process the received information and determine the location of the incident through the Zones and transmit the information to the output devices such as sub-display boards, bells, whistles, lights... The devices will play signal such as sound and light so that people can detect the problem area.
I. SYSTEM INSTALLATION PROCESS.
Prepare construction plans for approval at competent authorities:
1. Go signal cable:
– Conduct wiring at all locations where emergency detectors are located, and where the fire alarm center is located. Lines must be installed aesthetically and meet safety standards. The wire must be threaded in the conduit to ensure the durability and safety of the system
2. Measure resistance.
– Conduct insulation resistance measurement for the installed wiring to ensure the correct specifications, standards and safety for the system.
3. Rules for equipment installation.
– Installation and installation of central cabinets: This is the most important device in the system, it determines the quality of the system. As a power supply device for automatic detectors capable of receiving and processing fire alarm signals from automatic fire detectors or technical trouble signals. In necessary cases, the signal can be transmitted to the fire alarm places. Capable of checking the operation of the system, indicating system problems such as broken wires, short circuits, etc.
– Smoke detector: Installed with the function of direct monitoring of activities, smoke signs, fire alarms to the center for handling. The time the smoke detector receives and transmits the signal does not exceed 30s. Ambient density is 15% - 20% if the smoke concentration in the environment is higher than the allowable threshold (15% - 20%), the device will send an alarm signal to the central cabinet for troubleshooting.
– Emergency switch: Installed in conspicuous places such as corridors, doors, stairs for easy use when needed. This device allows users to actively transmit fire alarm information by pressing or pulling the emergency switch to give an emergency alarm to everyone in the area of the incident detected and handled.
– Fire siren: Installed in security rooms, stairs or crowded places… to alert people around and handle incidents promptly.
4. Test and test run.
a. Check the operation of the central cabinet;
– Check the phase indicator light: to test whether the 3-phase input source is out of phase
– Overload indicator light: to test whether the pump is overheated or overloaded
– Check volt meter, amp: see if the input voltage value is enough
- Check the operation mode of the cabinet (always in auto mode)
– Check the total CB + pump control CB: see if the CBs have abnormal problems, the CB is always in the ON state
– Intermediate relay + Delay timer: test to see if the contacts have good switching
– Check the battery charger automatically: the value of AC voltage in and DC power out of the battery.
b. Put the whole system into test run.
– After the system is tested, the smoke detectors will be tested to control and familiarize themselves with the operating status of the system.
– Handing over and re-instructing staff in charge at the unit to manage and control the entire system.
Please see more: Những thông tin cơ bản về hệ thống báo cháy tự động.
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