Conventional Fire Alarms

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Conventional Fire Alarm Control Panels

A conventional fire alarm control panel links to a number of lines of fire, heat and smoke detectors, and manual call points. There are referred to as detection zones. Depending on the responses received from the detection zones the control panel may activate a number of sounder or alarm systems. A conventional control panel is effective for small building types as it can indicate the zone in which the problem has been detected and usually supports up to around 40 zones with each zone being up to 2000 metres cubed in area. The fire alarm system operates with mains power and battery backup.


Different types of fire alarm detection devices:

Smoke Detectors
Optical smoke Detectors:
In some optical smoke detectors use a light beam which when blocked by smoke activate the alarm In others it is triggered by light scatter caused by the smoke. These are slightly less sensitive.
Ionisation Smoke Detectors Detectors:
Ionization detectors have an ionization chamber and a source of ionizing radiation, this ionises the air in the detector. When smoke enters the ionization chamber, the smoke particles neutralise the ionised air and triggers the alarm. These detectors are very sensitive and when choosing a detector the building environment most be taken into consideration.


Heat detectors
Rate of rise heat Detectors.
Rate-of-Rise (ROR) heat detectors operate by detecting a rapid rise in temperature of 6.7° to 8.3°C increase per minute, irrespective of the starting temperature. When this rate is exceeded the alarm is activated..

Fixed heat detectors
This is the most common type of heat detector. Fixed temperature detectors operate when the heat sensitive eutectic alloy reaches the eutectic point changing state from a solid to a liquid. The most common fixed temperature point for electrically connected heat detectors is 58°C. These detectors are often used in boiler rooms.

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Break Glass units
If someone in your building sees a fire before it has reached a smoke detector or heat detector, they need to be able to let everyone in the building know immediately. Manual call points or “break glasses” enable them to signal the emergency simply by pressing the glass.

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Fire Beams
Reflected beam smoke detectors consist of a transceiver (a transmitter/receiver) unit that projects, monitors, and receives a beam reflected across the protected area. The detector works on the principle of light obscuration.

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Fire Doors
Magnetic Smoke Door Holders: Wall or floor mounted solenoids or electromagnets controlled by a fire alarm system or detection component that magnetically secures spring-loaded self-closing smoke tight doors in the open position. Designed to de-magnetise and allow automatic closure of the door on command from the fire control.

Fire alarm maintenance

It is imperative that your fire alarm equipment is serviced regularly to comply with Health and Safety Regulations. You must use qualified fire alarm engineers to carry out annual fire alarm tests and inspection. Good Fire and Safety can assist you with all aspects of fire prevention and any technical questions.

Good Fire and Safety fire alarm engineers can carry out all of the necessary fire alarm tests and inspections for you and we would recommend that your fire alarm system is tested each quarter by qualified fire alarm engineers. Daily and weekly tests can be carried out by your own trained personnel.

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