The design and installation of fire detection and alarm systems will help save lives and protect property and the environment. The system will detect a fire inside or outside a structure as early as possible and give building occupants early warning of fire. In result, it provides a greater chance of reducing human and material losses.
In order to work well, a fire detection and alarm system must be installed and maintained correctly by experienced personnel.
There are three types of fire alarm systems. They are analogue addressable fire alarm systems, conventional fire alarm systems and wireless fire alarm systems.
With an addressable fire alarm system, each smoke or heat sensor and manual call point is coded with a unique address. The control panel is able to communicate with any of the addressable devices by using the address number to define which device it wishes to communicate with. When a detector or manual call point is triggered, the panel will indicate the specific device address that has been activated.
Addressable fire alarm systems are wired on loops rather than radial circuits which allows for audio visual warning devices such as sounders and beacons to be connected onto the same circuits as detectors and call points, which reduces installation costs. Most addressable systems now provide combined detectors, sounders and beacons in a single unit.
Addressable fire alarm systems are always used at large, open places for high security fire alarm and fire surveillance.
A conventional fire alarm system requires a building to be divided into a number of areas called zones. The detectors and manual call points within each zone are wired on dedicated circuits. When a detector or manual call point is triggered, the panel identifies which circuit contains the triggered device and which zone the fire alarm has come from. It is then necessary to manually search the indicated zone to find the exact cause of the fire alarm.
A conventional fire alarm system needs separate alarm circuits to signal a fire to the building users.
When designing a conventional system it is important to ensure that the panel has enough zone capacity for the size and complexity of the building and that the panel can support the intended sounder circuit wiring and loading.
Wireless fire systems use an array of sensors, antennas and alarms that most commonly receive and send low power radio signals to one another in much the same way cellphones communicate with Wi-Fi networks. Wireless security systems are well applied when remodeling and retrofitting college dorms, hotels, and commercial offices, all situations where people prefer to not drill through concrete or rip out existing drywall.
There are high capacity wireless alarm panels which can equip up to a maximum of 1000 detectors and manual call points. The wireless transmission distance can reach to 1-3km with long range wireless alarm repeaters available for longer distance. Wireless smoke detectors and heat detectors can be easily installed at each room and codeed to the alarm panel.
The alarm panel will identify each triggered detector by zone number and alarm information which can be editted. The alarm information, alarm time, and alarm zone can be printed.
In addition to the requirements of EN54-2, all control panels have voltage free relay contacts for fire and local fire which operate upon a fire condition.
Activation of alarm devices with different sounds signals indicate pre-discharge and released warning.
CM1004 is a new technology fire alarm system that meets new fire alarm requirements. It allows a remote source to sound the alarms. The fire alarm panel can connect to repeaters with 4-wire connections.