At AK Fire will protect your business with a professional fire alarm system to suit your needs we are experts in a wide range of fire alarms systems so what ever your fire alarm query is we have specialist available to talk to you
Keep your fire alarm systems working with regular maintenance Legislation states that all types of fire systems should be tested once a week. AK Fire offer crash courses that are readily available to ensure you are fully comfortable understanding and operating your system should any issues arise. We will also comprise a asset list of all your fire alarm items ensuring they are maintained to high standard
The choice of fire alarm system depends on the building structure, the purpose and use of the building and current legislation. In new or altered buildings the enforcement body is the local building control, and the relevant guidance is explained in section new or altered buildings. All existing buildings except domestic premises are subject to The Regulatory Reform (Fire Safety) Order 2005 and the Responsible Person, as defined in the order, has to conduct a fire risk assessment. This FRA will decided the appropriate British standard necessary to provide a suitable and sufficient solution for the premises. The enforcement body is the Fire and Rescue Service and the Department of Communities and Local Government (DCLC) have published a number of guidance documents for premises subject to the RR(FS)O. This is particularly important since none of the legislation gives any detailed information on the type of system required but the guidance usually indicates appropriate British standards. The main standard for fire alarm systems is BS5839 pt1:2013.
This guidance contains brief descriptions of the major components which go to make up a fire alarm system. The points to be considered are intended to highlight the variables which can exist and need to be considered whilst designing and compiling a specification for component parts.
It is not the object of this note to consider the details of different circuit types or to discuss their relative merits.
Types of Fire Alarm Systems
alarmsense-8-zone-panelAll Fire Alarm Systems essentially operate on the same principle. If a detector detects smoke or heat or someone operates a break glass unit (manual break point), then alarm sounders operate to warn others in the building that there may be a fire and to evacuate. It may also incorporate remote signaling equipment which would alert the fire brigade via a central station.
Fire Alarm Systems can be broken down into four categories:
- Analogue Addressable
- AddressableWireless systems
- Aspiration System
- Hybrid Systems part wired part wireless
In a Conventional Fire Alarm System, a number of call points and detectors are wired to the Fire Alarm Control Panel in Zones. A Zone is a circuit and typically one would wire a circuit per floor or fire compartment. The Fire Alarm Control Panel has a number of Zone Lamps. The reason for having Zones is to give a rough idea as to where a fire has occurred. This is important for the fire brigade and of course for the building management. The accuracy of knowing where a fire has started is controlled by the number of Zones a Control Panel has and the number of circuits that have been wired within the building. The Control Panel is wired to a minimum of two sounder circuits which could contain bells, electronic sounders or other audible devices. Each circuit has an end of line device which is used for monitoring purposes.
The detection principle of an Addressable System is similar to a Conventional System except that the Control Panel can determine exactly which detector or call point has initiated the alarm. The detection circuit is wired as a loop and up to 99 devices may be connected to each loop. The detectors are essentially Conventional Detectors, with an address built in. The address in each detector is set by dil switches and the Control Panel is programmed to display the information required when that particular detector is operated. Additional Field Devices are available which may be wired to the loop for detection only i.e. it is possible to detect a normally open contact closing such as sprinkler flow switch, or a normally closed contact opening. Sounders are wired in a minimum of two sounder circuits exactly as a Conventional System. Loop Isolation Modules are available for fitting on to the detection loop/loops such that the loop is sectioned in order to ensure that a short circuit, or one fault will only cause the loss of a minimal part of the system.
Analogue Addressable Fire Alarm Systems
Analogue Addressable Fire Alarm Systems are often known as Intelligent Fire Alarm Systems. There are several different types of Analogue Systems available which are determined by the type of protocol which they use. The bulk of standard Analogue Detectors available are fairly stupid as the Detectors can only give output signals representing the value of detected phenomena. It is left up to the Control Unit to decide whether there is a fire, fault, pre-alarm or other. With a true Intelligent Analogue System each detector effectively incorporates its own computer which evaluates the environment around it, and communicates to the Control Panel whether there is a fire, fault or the detector head needs cleaning. Essentially Analogue Systems are far more complex and incorporate far more facilities than Conventional or Addressable Systems. Their primary purpose is to help prevent the occurrence of false alarms. With the Analogue Addressable System, up to 127 input devices i.e.: Smoke Detectors, Call Points, Heat Detectors, Contact Monitors and other interface devices may be wired to each detection loop. In addition to the 127 Input Devices, up to 32 Output Devices such as Loop Sounders, Relay Modules and Sounder Modules may be connected. Analogue Systems are available in 2, 4 and 8 loop versions which means large premises can be monitored from one single panel. Isolator units should be connected between sections of detectors as described for Addressable Systems.
Wireless Fire Alarm System
Wireless fire alarm systems are an effective alternative to traditional wired fire alarm systems for all applications. They utilise secure, licence-free radio communications to interconnect the sensors and devices (smoke detectors, call-points, etc.) with the controllers. It is a simple concept, which provides many unique benefits and is a full analogue addressable fire detection system without the need for cable.
Before starting, the designer will need to ensure that certain information is available. This may be given in the specification or it may have to be obtained by consultation. As well as the purchaser, there may be a requirement to consult with other interested parties
Points to consider
- The type of system required i.e. L1, L2, L3 etc and where appropriate, parts of the premises to be covered.
- The action to be taken in the event of fire
- Whether other occupants of a multi occupancy building will be affected
- Whether other work is to be done at the same time. If so then consultation with other contractors may be required.
- A Method of calling the Fire Brigade
- Whether the type of occupants or activity in the building will require a greater provision of Manual Call Points than normal
- A likely attendance time of the Fire Brigade
- Control of Indicating Panels
These can be divided into four main types Heat detectors, Smoke detectors, Carbon Monoxide detectors and Multi sensors detectors.
We also offer a complete fire alarm system design service and risk assessment of your property in order to identify potential problem areas. We can design and commission wide range of systems to suit you
Our team are able to supply a full service or install a comprehensive range of fire alarm equipment in accordance with British Standard 5839 Part 1.
Your fire safety is of up most important to us so we will ensure you have a copy of your fire safety schedule so you can see when your fire safety is required we aim to make your fire safety strategy as cost effective and reliable as possible.
Fire Alarm Servicing
Fire Alarm Servicing is vital in ensuring that your business is fully protected. Here at AK Fire , we will carry out a full service on your fire alarms in accordance with British Standard 5839 so you can rest assured your system will be in good hands we have Fire alarm maintenance contracts available please speak to a member of our staff they will be happy to help.
Fire Alarm Breakdowns and Repairs
Do you have a problem with your fire alarm system? Well we can help
Are team offer a Callout breakdown service so you can contact us 24hrs a day for support are engineers will come out and look at your system no matter what time it is and will aim to fix the problems there and then for you.