Fire alarm systems serve as a crucial component for detecting fires within buildings. These systems alert occupants to the presence of a hazard through both visual and audible alarms. In addition, they automatically contact the fire department to report the hazard using a pre-recorded message, ensuring a prompt emergency response.<\/p>\n
Details and Features<\/strong><\/p>\n Introduction to Fire Alarm Systems<\/strong><\/p>\n Fire alarm are essential tools for detecting fires within buildings and alerting occupants through both visual and audible alarms. Additionally, these systems automatically contact the fire department to report the hazard using a pre-recorded message. The main components of such systems include smoke detectors (and other detectors such as heat and gas detectors), manual call points, sirens, flashers, and control panels which act as the brains of the system.<\/p>\n The advantages of this system include timely warnings and the potential to prevent financial losses and protect human lives. It is recommended that these systems be installed in all units of a building. Today, fire alarm systems consist of intelligent sensors, control panels, and various other intelligent components. However, the fundamental purpose of these systems has remained unchanged over time: to alert occupants in the event of a fire hazard.<\/p>\n <\/p>\n How does a fire alarm system work?<\/strong><\/p>\n The primary purpose of a fire alarm system is to detect fires, alert occupants, and facilitate the delivery of emergency services from a controlled environment. These systems are equipped with specialized components that enable them to identify the exact location of the hazard and diagnose potential technical issues that may cause system malfunctions. Essentially, fire alarm systems operate based on four main protocols:<\/p>\n Detection<\/p>\n Alarm<\/p>\n Supervision<\/p>\n Control<\/p>\n Types of fire alarm systems<\/strong><\/p>\n Fire alarm systems are manufactured in two main types: conventional fire alarm systems and addressable fire alarm systems.<\/p>\n Conventional fire alarm system: <\/strong>These systems are cost-effective and primarily used in smaller occupancies such as stores and restaurants. In a conventional system, the building is divided into several detection zones, each equipped with a few sensors. For each zone, all sensors and manual call points are installed on a single circuit connected to the control panel. Each audible or visual alarm in this system is connected to the control panel using a two-core cable. When a detector is activated, the control panel indicates the zone where the fire or hazard has occurred. The limitation of this system is that the exact source of the alarm must be manually located, which can be time-consuming, especially in larger areas. Conventional fire alarm systems only alert to a hazard within a specific zone without providing detailed information about the exact location of the hazard within that zone.<\/p>\n Addressable fire alarm system: <\/strong>Addressable fire alarm systems provide specific information about individual sensors that detect fire. These intelligent systems use loops to connect various detectors and other initiating devices. Each component, such as sensors and call points, has a unique address. Control panels continuously monitor the exact location and functionality of all components, faults, and fire alarms, displaying this information on the control panel. Addressable systems offer greater flexibility, control, and speed in fire detection compared to conventional systems, although they are more expensive. These systems are typically installed in large commercial buildings and occupancies requiring higher levels of security.<\/p>\n Wireless fire alarm systems:<\/strong> Wireless fire alarm systems are more expensive but offer greater flexibility and ease of installation. These systems are as effective as conventional fire alarm systems but eliminate the need for time-consuming cable testing due to their wireless nature. They rely on batteries for power and are sometimes connected to radio frequencies, equipped with liquid smoke detection systems. Wireless systems must comply with EN54-25 standards. These systems are continuously improving and are well-regarded by clients. Wireless systems are more reliable than older systems used in the past, with multi-frequency connections that help eliminate signal interruptions, providing a robust connection. Smoke detectors in these systems use a fan to draw air from around the building through a network of pipes and sampling orifices, producing a fire detection signal when a fire is detected. While these systems are highly effective for rapid fire detection, their installation and maintenance can be costly and time-consuming.<\/p>\n <\/p>\n Fire Alarm Components<\/strong><\/p>\n As mentioned earlier, fire alarm systems are comprised of different components which function together to deliver the final purpose of the fire alarm system. Some of these components are:<\/p>\n Fire Alarm Control Panel<\/p>\n Initiating Devices<\/p>\n Fire Alarm Pull Stations<\/p>\n Smoke Detectors<\/p>\n Duct Detectors<\/p>\n Heat Detectors<\/p>\n Ray Detectors<\/p>\n Air Sampling Detectors<\/p>\n Water Flow Switch<\/p>\n Supervisory Switch<\/p>\n Alarm Devices<\/p>\n Audible Alarms<\/p>\n Sirens<\/p>\n Communicators<\/p>\n NAC Power Supplies<\/p>\n <\/p>\n Fire Alarm Control Panel<\/strong><\/p>\n The primary responsibility of the fire alarm control panel (FACU) is systems management. It is capable of detecting the exact location of a fire, receiving fire signals from detectors, and sending out signals to the alarm devices. This equipment should be installed in high-traffic areas to ensure people are promptly informed if a fire hazard is detected. The FACU is considered the brain of the system. Upon receiving signals from initiating devices, the panel takes one or more of the following actions:<\/p>\n Activating the alarms: <\/strong>By receiving a fire signal, the FACU sends out signals to the alarm devices to alert occupants of the hazard.<\/p>\n Elevator call: <\/strong>The FACU also manages elevator operations to prevent transferring occupants to the hazard area.<\/p>\n Turning off the HVAC device: <\/strong>When smoke is detected within the HVAC system’s ducts, the system is turned off to prevent the spread of smoke to other parts of the building.<\/p>\n Alerting the alarm devices: <\/strong>The FACU notifies a remote monitoring station, which then takes responsibility for emergency alarms.<\/p>\n Minimizing the false alarms: <\/strong>A fire alarm system that is poorly installed or inadequately maintained may produce false fire signals. Frequent false alarms can lead to complacency, causing people to ignore real alarms unless they see, smell, or feel smoke or heat. To minimize false alarms, manufacturers enforce regular testing, inspection, and maintenance to keep the system operational.<\/p>\n <\/p>\n Different types of fire alarm control panel<\/strong><\/p>\n Fire alarm control panels can be categorized into two main types:<\/p>\n Addressable: <\/strong>Addressable panels monitor each component individually. Each device has a unique address that allows the panel to identify its status, such as normal operation or fault condition. For example, addressable systems enable hotel receptionists to pinpoint the exact location of a hazard by referring to the panel.<\/p>\n Non-addressable: <\/strong>In non-addressable systems, all components are grouped into zones. Operators must manually inspect each zone to locate the hazard. When an alarm is triggered in a non-addressable system, the emergency message only indicates the zone number.<\/p>\n Most property owners prefer addressable systems for their ease of operation and rapid hazard location detection. Some panels can also alert remote supervisory stations to communicate with emergency services. Fire alarm control panels continuously monitor and display the system’s status, typically showing one of three conditions:<\/p>\n Normal: <\/strong>All devices and cables are functional with no active alarms.<\/p>\n Alarm: <\/strong>An active alarm is present in the system.<\/p>\n Fault: <\/strong>A fault condition, such as a short or open circuit in the system or an interrupted telephone connection, is indicated.<\/p>\n <\/p>\n Input devices<\/strong><\/p>\n Input devices are responsible for activating alarms and may be either addressable or non-addressable (conventional), similar to fire alarm control panels. Some initiating devices, such as flow switches, are conventional but can be connected to addressable modules. These switches may have unique addresses that allow them to communicate with addressable systems.<\/p>\n <\/p>\n Pull stations<\/strong><\/p>\n A pull station is typically part of a fire alarm system. This manually-operated device triggers alarm signals when activated. In situations where smoke takes time to reach the detector, pulling this device can immediately activate the alarms, allowing for the timely evacuation of occupants and the intervention of fire department personnel. Pull stations come in various sizes and shapes and can be equipped with special protection.<\/p>\n <\/p>\n Smoke detector<\/strong><\/p>\n Detectors are responsible for transmitting received signals to the control panel, prompting it to alert all components of the system. Detectors are categorized into different types, such as heat detectors, smoke detectors, beam detectors, combination detectors, and flame detectors, each producing signals according to their specific features and initiating different commands on the control panel. A smoke detector is a device that senses smoke and sends a signal to the panel. These devices are available in two types, depending on the kind of sensor they use.<\/p>\n Ionization detectors: <\/strong>These detectors contain a small amount of radioactive material situated between two electrically charged plates. Ions flow between the plates, creating a small, constant electrical current. When smoke particles enter the chamber, they disrupt the flow of ions, reducing the current. This interruption triggers the alarm.<\/p>\n Photoelectric detectors: <\/strong>Photoelectric detectors emit LED light beams in their detection chamber. When smoke particles are present in the chamber, they scatter the light beam, causing a portion of it to be deflected towards a light sensor. When the sensor detects this scattered light, it triggers the alarm.<\/p>\n <\/p>\n Duct Detector<\/strong><\/p>\n Duct detectors are a type of smoke detector installed within HVAC ducts. They are responsible for shutting down the HVAC units to prevent the spread of smoke throughout the network.<\/p>\n <\/p>\n Heat detector<\/strong><\/p>\n Heat detectors are equipped with sensors that enable them to detect heat through two main mechanisms:<\/p>\n Rate of rise heat detector: <\/strong>Activated when the temperature rises abruptly.<\/p>\n Fixed temperature heat detector: <\/strong>Activated when the temperature exceeds a predetermined threshold. This type includes:<\/p>\n Linear Heat Detectors: Sense temperature along a continuous line.<\/p>\n Point Heat Detectors: Sense temperature at a specific point.<\/p>\n Beam detector<\/strong><\/p>\n Beam detectors project a single beam of light across the detection chamber. When this beam is interrupted, the detector interprets it as the presence of smoke.<\/p>\n Air sampling detector<\/strong><\/p>\n Air sampling detectors utilize a network of pipes to draw air samples to a central detector equipped with a smoke sensor. This sensor can detect the precise chemical composition of the air. Air sampling detectors are highly sensitive and provide early warning of fire hazards.<\/p>\n <\/p>\n Water flow switch<\/strong><\/p>\n Water flow switches use paddles to detect water flow within pipes, serving as an essential component in monitoring sprinkler system activation.<\/p>\n <\/p>\n Supervisory switches<\/strong><\/p>\n Supervisory switches send out signals if there is any change in their initial state, ensuring the continuous monitoring of critical system components.<\/p>\n <\/p>\n Alarming devices<\/strong><\/p>\n These devices produce audible or visual alarms to alert occupants of a hazard.<\/p>\n <\/p>\n Audible alarm devices (Siren, horn)<\/strong><\/p>\n Audible alarm devices consist of sirens and horns, which are typically located in exit paths, stairwells, and corridors. These devices are activated upon receiving a signal from the control panel, alerting occupants to the hazard and prompting them to quickly evacuate the building.<\/p>\n <\/p>\n Flasher<\/strong><\/p>\n Flashers provide visual alarms to alert occupants of a hazard through flashing lights.<\/p>\n <\/p>\n Communicator<\/strong><\/p>\n Some fire alarm systems include an internal or external communicator that connects with emergency service providers, such as the fire department. Communicators can operate through radio signals, telephone lines, or internet connections to ensure prompt emergency response.<\/p>\n NAC power supply<\/strong><\/p>\n Advanced fire alarm systems often require additional power supply units known as alarm or NAC power supplies. These units can be integrated into panels or distributed throughout the building as needed. Several systems can be connected to the fire alarm system, including:<\/p>\n Extinguishing systems such as water sprinkler<\/p>\n Connecting and disconnecting Elevator power supply<\/p>\n Smoke Control<\/p>\n HVAC fan and damper control<\/p>\n Unlocking and opening the door<\/p>\n Security systems<\/p>\n Mass communication systems<\/p>\n Supervision of manual extinguishers<\/p>\n According to fire alarm codes and signaling standards, some of these functions serve as safety measures against fire, implemented to enhance security and protect the lives of occupants. Combining certain functions can improve safety and cost-effectiveness. Regular inspections are essential, with frequencies varying from weekly, monthly, biannually, to annually.<\/p>\n Control devices: <\/strong>Inspect weekly to ensure system functionality, including checking LEDs, power supplies, fuses, and monitoring panel faults.<\/p>\n Batteries: <\/strong>Inspect once or twice a month, depending on the battery type, for any potential leakages.<\/p>\n Detectors: <\/strong>Inspect every six months to ensure proper functionality.<\/p>\n \u00a0<\/strong><\/p>\n Additional components of fire alarm system<\/strong><\/p>\n All previously mentioned components and devices are integral to a fire alarm system. However, as technology advances, new devices are continually being developed and integrated into fire alarm systems. These advancements facilitate increased automation and reduce the need for manual human intervention. The new equipment enables systems to automatically perform functions such as opening doors, turning off HVAC units, activating positive pressure systems, and closing natural gas inlets to prevent explosions.<\/p>\n <\/p>\n Which kind of fire alarm system is recommended?<\/strong><\/p>\n Fire alarm systems serve as a crucial component for detecting fires within buildings. These systems alert occupants to the presence of a hazard through both visual and audible alarms. In addition, they automatically contact the fire department to report the hazard using a pre-recorded message, ensuring a prompt emergency response.<\/p>\n","protected":false},"featured_media":549,"comment_status":"open","ping_status":"closed","template":"","meta":[],"product_cat":[23],"product_tag":[39],"class_list":["post-548","product","type-product","status-publish","has-post-thumbnail","product_cat-water-based-fire-fighting-system2","product_tag-fire-alarms","first","instock","shipping-taxable","product-type-grouped"],"_links":{"self":[{"href":"https:\/\/www.azarmaharan.com\/en\/wp-json\/wp\/v2\/product\/548","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.azarmaharan.com\/en\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/www.azarmaharan.com\/en\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/www.azarmaharan.com\/en\/wp-json\/wp\/v2\/comments?post=548"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.azarmaharan.com\/en\/wp-json\/wp\/v2\/media\/549"}],"wp:attachment":[{"href":"https:\/\/www.azarmaharan.com\/en\/wp-json\/wp\/v2\/media?parent=548"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/www.azarmaharan.com\/en\/wp-json\/wp\/v2\/product_cat?post=548"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/www.azarmaharan.com\/en\/wp-json\/wp\/v2\/product_tag?post=548"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}Since the nature of fires can be unpredictable, it is recommended that each occupancy be equipped with a combination of detectors, including ionization and photoelectric sensors. Azar Maharan Pishro offers a variety of fire alarm systems certified by various international standards and provides comprehensive services, including full installation, initialization, and design.<\/h2>\n","protected":false},"excerpt":{"rendered":"