Design and implementation instructions for the fire alarm system
NFPA-72 based on standard
۱) Each zone has a maximum area of ​​۲۰۰۰m2.
۲) The maximum length of the zone is 3000m.
۳) The maximum number of elements in each zone (including thumbs and detectors …) is 24 elements, and it is best to get a maximum of 20 characters.
۴) Each residential floor can be located on a zone.
۵) It is suggested that the firewall should declare a class corridor on a separate zone.
۶) Where there is an induction voltage (transformer room, switch, etc.) should be used with coated wire.
۷) The wire should be a single piece and in a separate and independent pipe.
۸) False ceilings and ceilings with a height of more than 80 cm require a detector.
۹) If the partition distance is set to the ceiling of less than 30 cm, then the separate detector shall be considered.
۱۰٫ If the ceiling height is more than 50 cm, a separate detector for each space is considered.
۱۱) All warehouses should have a detector:
A. If the warehouse is in the residential unit, it is necessary to consider a thermal detector.
B – For warehouses in the parking lot if it is in a row at a distance of 50cm from the warehouses and at a maximum distance of 8m from
Also installed. And if the inventory is set, a detector is installed on the input path.
۱۲) A smoke detector should be installed in the vicinity of the meter board.
۱۳٫ Each engine room and well of the elevator must have a separate zone of smoked detectors (the Smoke Aspretion System is recommended).
۱۴) In industrial niches and buildings with a power raiser, it is necessary to use the Smoke Detector or the Linear Heat Detector
۱۵) The maximum coverage level of the smoker detector is 100 m2 and for the thermal detector is 60 m2.
۱۶) The maximum height of the detector is 12 m for the detector and 8 m for the thermal detector.
۱۷) Range of detectors:
A. Smoke detectors:
– A circle with a radius of 6.5 meters
– Smoke detector distance 10.6 meters to 15 meters according to installation location.
B. Thermal detectors:
– A circle with a radius of 5.3 m in high-risk areas such as the kitchen.
– A circle with a radius of 6.5 meters in less risky places, such as parking.
– The distance between the two detectors is 7.5 meters up to 10.6 meters according to the location and arrangement of the installation.

۱۸٫ Use of two-channel detectors in hotels and residential buildings is good, but for industrial areas it is necessary to use a separate detector.
۱۹) The location of the smoke detector should not be in or near the flow of air (away from the window and door and parking space.
۲۰) The minimum detector distance to the wall or partition is 50 cm and maximum 7 m for smoke and 5.5 m for thermal.
۲۱) The best place to install the fire alarm panel is at the guard, janitor and information room or near the entrance of the building. In such a way as to be seen by the general public and especially by the firefighter.
۲۲) In the space of the hollow, the maximum traversal distance that the person traverses to reach the thumb must not exceed 20 m.
۲۳) In inclined roofs, detectors should be installed at a height 50 cm lower than the highest point of the roof.
۲۴) Fire alarm trigger:
– Fire extinguishers are installed in the normal mode at an installation height of 120 to 140 cm and fire warning panels at a height of 170 cm from the floor.
– Distance between nuts in narrow and narrow corridors between 30 to 45 m.
– The distance between the nuts in the narrow passageways and the stairs between 15 and 25 m.
– At the side of each door or outlet staircase (when draining the building), a thumb must be installed.
– Use the thumb at the escape and exit areas and the beginning of the staircase.
– Addressable system:
(۲۵) For residential complexes and large industrial niches, the use of the addressable system is mandatory.
۲۶) The maximum length of the loop is 3 Km and has a maximum of 128 elements.
۲۷) The reciprocating system can not be used to route back and forth into a pipe.
۲۸) The maximum number of loops is 4.
۲۹) In each zone, a maximum of 24 types of sensors are considered.
۳۰) Sensor cable connection type (JY-ST-Y) mm0.8. From the 1.5 mm cable, the cable can be used for screws and washers.
۳۱) In commercial-residential complexes, there is no need for a specific connection between fire control systems for commercial and residential units, and only alarms in the open space are considered.
۳۲) Each business unit has an independent fire alarm system and a fire alarm system is used in the passage.
۳۳) At the end of the siren path, the end resistance of the line shall be taken into account.
۳۴) If the wiring of the fire alarm system is to be used, it should be used with a metal pipe and use the forks [Forwarded from the Directorate of Engineering and Mechanical Engineering]
Avoid plastic.
۳۵) In a plan of the Fire Detection System, which has been developed by the cable and fire detection center, an explanation
The zones of each zone are given.
۳۶) A separate zone should be considered for escape stairs with its chassis escaping on each floor and on the stairs path. (37) As it is mounted on the chassis staircase platform, the chassis next to the entrance door of the building unit is removed.
۳۸) All the bedrooms have a smoke detector. But the corridor space does not require a detector.
۳۹) Due to the high sound power of the fire alarm sirens, in addition to underground and ground, it is necessary to install a siren on both floors of 75 dB, and preferably in each unit, a visitor with 30 dB sound power. In any case, every residential building must have at least two sirens.
۴۰) It is necessary to define the number of zones and the functional area of ​​each zone in the plan drawn up by the central fire alarm system (F.A.C). for example :
“You have a central fire alarm system