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    Fire alarm system plays an important part of the fire and life safety of building and its occupants. Fire alarm system main function is to detect a fire at a sufficiently early stage so that the people who are at risk can made safely either by escaping as fast as possible or extinguishing the fire that can also reduce or prevent the property damage. Therefore, a reliability and functionality of fire alarm system as a whole is very important. 

    The following are the different types of the Fire Alarm System:

    1. Conventional fire alarm system

    a. Conventional fire alarm system uses physical cabling to connect several detectors and call points. Conventional fire alarm system has no way to identify immediately the exact location of the fire, but can be arranged in “Zones” to easily identify the location of the cause of the alarm. Its devices are cheaper but will consume more cable wires compare to addressable, since each device will be connected to the control panel by its own cable wire. This system are mainly used specially in smaller property.
    conventional fire alarm system Wiring diagram 

    2. Addressable fire alarm system

    a. Addressable fire alarm system has the same detection principle, except that each detector can be given a set address that can help to identify the exact location of the detector that initiated the alarm, that can be seen in the fire alarm control panel. Addressable fire alarm system saves a lot of wire compare to conventional system, since the devices can share one cable wires up to the last device. Both ends of the wire is loop connected to the fire alarm control panel. This system are very suitable for large and high buildings, since they are able to pinpoint exactly which devices are triggering the alarm.
    addressable fire alarm system Wiring diagram

    3. Wireless fire alarm system

    a. Wireless fire alarm system, is hassle-free to install compare to conventional and addressable since it does not use any conduit and cable wires. However, even though you saved a lot of money in material and labor cost, the hardware and programming are higher than the wired systems. The devices are battery powered and can be placed anywhere and can be easily relocate if needed.
    wireless fire alarm system

    Fire Alarm System Components 

    The main component of fire alarm system are the following:
    1. Fire Alarm Control Panel
    Fire Alarm Control Panel is the brain or central hub of a fire alarm system. It displays the location and status of the alarm devices, and it gives precise location of the device that cause the alarm.
    fire alarm control panel
    2. Fire Alarm Initiating Devices
    Fire Alarm Initiating Devices are the devices that detects signs of fire and triggers the alarm. They are connected to the fire alarm system control panel. Initiating devices includes smoke detectors, heat detectors, flame detectors, manual pull station and fire sprinkler water flow switch.
    Fire Alarm Initiating Devices
    3. Fire Notification Devices
    Fire Notification Devices are the audible and visual devices in fire alarm system, it includes fire alarm horn, speaker and bell. Its main function is to alert people at risk in the event of a fire, that is why it is considered as the most important components of fire alarm system.
    Fire Notification Devices
    4. Primary Power Supply
    Primary power supply is typically supplied by the local utility, and also from generators that are located in remote areas wherein the electrical grid is not available. 
    5. Backup Power Supply
    Backup power supply commonly supplied by batteries and stored internally or adjacent to main fire alarm control panel or can be also from generator. It must also provide a 24 hours of power supply to control panel in case of power shortage.

    How Fire Alarm System Works? 

    In an event of a fire emergency, the fire alarm system main role is to detect fire and to alert people at risk inside the building and emergency response team to control the situation as fast as possible. Fire alarm system key functions is to detect (by the use of smoke detectors, heat detectors, flame detectors, etc.) , alert (by the use alarm horn, speaker, and bell), and monitor (control panel). 

    Fire Alarm System Maintenance 

    A functioning and well-maintained fire alarm devices can help reduce injuries, save lives and properties. The fire safety systems inspection, routine maintenance, and testing will help one in keeping in compliance with the local/state fire inspectors and also their insurance carrier. To keep the best condition of the fire alarm devices, it is advisable to keep a scheduled maintenance and check the following: 
    1. Checking of physical appearance of the fire alarm devices
    2. Smoke Detectors should be cleaned & tested for sensitivity levels (addressable type)
    3. Fire alarm control panel should be tested for all alarm, trouble, supervisory, reset & silence function
    4. Checking of the devices power supply
    5. Checking/ replacement of batteries
    6. Checking/ removal of any obstruction on the devices that may cause false alarm or malfunctioning
    7. Checking if the alarm is audible
    8. Devices must be replaced when exceeded 10 years from the manufactured date

     

    ASENWARE Centralized Monitoring Emergency Luminaire System is designed for managing, monitoring and controlling emergency lights automatically. 
    ASENWARE Fire Pump Series provide fire departments or private users with the ability to pump from any water source.

    At ASENWARE, you can choose the best quality of fire fighting equipment like  extinguisher, hose reels, fire monitors, nozzles and hose pipes.
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Home > Newsroom
Smoke detectors for fire alarm
2020-06-18
smoke detector

​The importance of smoke detector

 

Except for the factors of falling, smashing and burning to death due to external force, most of them are because
of the smoke and temperature at the disaster site led to death;

fire Extinguishing
 

When the smoke containing a large amount of smoke is inhaled by personnel at the fire site, it will adhere to the
nasal cavity, mouth, and trachea, enter the bronchus, bronchiole, and small bronchus, and even spread into the
lungs and adhere to the alveoli, resulting in insufficient ventilation of the lungs and eventually suffocated.

 

 smoke

Smoke is one of the important signs in the early stage of a fire. Smoke sensors are developed to detect smoke at
an early stage. smoke detector can find visible or invisible smoke.

 

 

smoke detector classification

 

Smoke detector can be divided into the following types according to usage:
 

1.Standalone smoke detector

The stand-alone smoke detector is called stand-alone photoelectric smoke detection alarm. It does not
require power supply from the panel. It comes with 9V or 3V smoke detector battery power supply with
 high level sound Buzzer,and Standalone smoke detector change battery more easy ,smoke detector
chirping sound alarm when alarming. There is no other external output,Easy installation;

 



2.Network smoke detector

Compared with the standalone smoke detector, the network smoke detector can not self-powered,which needs
to be supplied by the fire alarm control panel. There is no built-in buzzer. The panel can supply power and reset it.
Wiring is 2 or 4 wires. It will make alarm and network to inform the people or department.It can connect with 
the fire alarm control panel for larger number of points through network function.The network smoke detector 
can be applied to house,buildings,etc. People can monitor it through the panel or PC.

Conventional Network smoke detector

 

Addressable network smoke detector



3.wireless smoke detector

The wireless smoke detector is similar to the combination of the above two, which called wireless network smoke detector with battery and buzzer. In addition to its own sound and light alarm when alarming, it will also communicate
with the panel or other wireless smoke output. Due to its communication distance or other wireless characteristics,
the application scale is limited;

 

 

Basic composition of smoke detector

 

1.Smoke detector shell

Different shapes are designed according to the development requirements of each company and customer, generally divided into upper cover, and middle cover.

 

2.Smoke Labyrinth (Smoke Chamber)

The smoke traps from different manufacturers with a different circuit, shape and designed, it have an integratedsmoke detector and a split smoke detector.

 

3.Circuit board

According to the respective design requirements, we have discrete components, useMCU smoke detector

 

4.Mounting the base
 

Protected area of asmoke detector 

 

When the install height of a smoke detector between 6-12m

Its protected area is 80 square meters, and the distance between two smoke detectors in the same level should less than 10 meters ;

The space height reaches 6m:

The protection area of a smoke detector is 60 square meters for a general protection place, and the distance between two smoke detectors is less than 8 meters based on the area of a circle;

*(The above data are calculated on the same plane. If there is a retaining wall, it should be calculated separately)

*(Specific parameters should be based on "Code for Design of Automatic Fire Alarm System")

 

Connection of smoke detector

 

2 Wiring smoke detector diagram

2 Wiring smoke detector diagram

4 Wiringsmoke detectordiagram

4 Wiringsmoke detectordiagram

Smoke Detector base installation diagram

Smoke Detector base installation diagram

 

Smoke detector application place

 

Such as residential houses, shops, companies, important warehouses, etc., basically can be installed in many places;
 

Smoke detector application place