Fire alarm: connection diagram, installation, principle of operation. Features of fire alarm installation Diagram of a fire alarm smoke sensor

On this moment Security and fire alarms have become quite common, increasing the level of protection of all kinds of objects. Thanks to its “many-sided” functionality and component composition, not only a fire is detected in a timely manner, but also careful control is maintained over the protected area. Such a device is quite complex and expensive to install and maintain, but you will not find an electronic device that is so reliable.

How does a fire alarm system work?

A fire protection system is a whole “set” of different technical devices, which ensure fire safety of various types of buildings, equipment, people, as well as material assets. It includes two systems: warning people in the building and a fire alarm.

Thanks to the fact that a software and hardware dispatcher was installed, you will always see the source of the fire on the site plan. If the semi-automatic mode was set on the alarm system, then after it receives alarm signal, the security service must turn on the fire warning system for personnel and at the same time activate visual, voice, and voice messages.

When a fire alarm in the building is confirmed, the main signal will be transmitted to the ACS - the “message” system and thereby put all alarm elements into emergency evacuation mode. The signal will also be sent to the control system for various engineering networks buildings, after which they will switch to fire hazard mode.

A fire device operating in automatic mode performs the following functions:

• Identification of the fire zone;
• Detection of a lesion after 2 confirmations from the moment of registration;
• Monitor network problems on short circuit, as well as a cliff with reference to the building plan;
• Detection of the lesion at the initial stage;
• Management of different blocks with the output of the obtained results to the dispatcher workstation;
• Viewing the fire safety status of building areas on a detailed and general plan, which are displayed on the dispatcher’s console in text and graphic format.

Features of design and calculation

Design of an alarm system is the main stage on which the effective operation of the entire system depends. This kind of work should be done by professionals because it complex circuit with a number of calculations, a significant number of devices and their location. However, since they are all connected to each other by a cable, it is therefore necessary to design the trajectory of further installation. In addition, one must take into account possible nuances, which are being developed in a project to eliminate emerging threats.

However, the development of an environmental protection project is a subjective process, since each object must be carefully studied taking into account the characteristics of use, as well as plans. Moreover, it is necessary to evaluate:

• Design complexity;
• Size of rooms;
• Specifics of the layout.

Attention should also be paid to places with the most probable occurrence hearth. The design of the fire alarm system is carried out taking into account the PUE, as well as DSTU. The project includes a huge number of different works:

• Technical specifications, which take into account all the client’s wishes;
• Study of premises;
• Creation standard project with all estimates for the work performed;
• After agreeing on all the nuances with the client, all documents and estimates are signed;
• Installation and testing of operation of the alarm system.

In the process of preparing for the installation of an alarm system, it is necessary to carry out many calculations, thanks to which you can choose the most ideal type of device and at the same time avoid additional costs, for example, with servicing detectors or installing the system itself.

The most important stage of the calculations is to determine the ideal capacity for the energy source itself. In other words, you need to decide which type of power source is most suitable for connecting the detectors. The source can be not only rechargeable batteries, but also ordinary batteries.

The required source capacity is usually indicated in the fire alarm operating instructions itself. Therefore, you need to check the value on the battery case with the available information in the instructions. If the power capacity is not enough, then buy a more powerful device. If you connect several batteries, you need to make sure they are the same voltage.

Also check required section wires for OPS and pay attention to the characteristics of the battery capacity for different modes work (anxiety, expectations). Next, you need to sum up these values, after which you will get the overall battery capacity of your OPS.

Types of systems

Today there are a huge number of different fire alarms of all possible levels of complexity. However, they all perform one function - they control the protected object using detectors. Most modern fire systems can remotely transmit a signal to the main security console and even perform many other service functions. But their main task is the timely detection of a fire on the territory of the facility or illegal entry. Depending on the method of determining the fire threat, systems can be divided into the following types:

• Non-addressed. Conventional sensors (manual, thermal, and smoke) are connected to the receiving and control devices, which display only the number of their loop. However, they do not transmit the address of the premises or the number to the main panel.
• The addressable system works on the following principle: the control panel receives data from the detectors, thereby determining the exact location of the fire.
• Analogue addressable signaling is very effective and reliable device, since the received information is sent to the main panel, and then it is analyzed by the main processor. Whether to sound an alarm or not is up to you software package, and not a specific detector.
• Threshold system with radial trains the most budget-friendly, however, its installation will be expensive. Wherein this type alarms can often give false alarms, so it will be necessary to duplicate detectors, which will lead to increased costs.
• The modular threshold system is more advanced, since any malfunction can be tracked via a PC, which means it can be immediately accepted necessary measures and troubleshoot. The disadvantage is the high price.

Main types of sensors

Fire detectors or sensors are special devices that allow you to record certain properties of a fire with its initial detection and further prevention. Also, sensors are the main element of the entire alarm system, ensuring fire safety. The reliability of the detector determines, in general, the effective operation of the system, and they are divided into the following types:

Heat detectors

They react to changes in air temperature and can be divided into:

A heat detector should only be used if heat is the main symptom of a fire.

Smoke detectors

They help detect the presence of smoke in the air, and they work on the principle of scattering infrared radiation on smoke particles. The disadvantage of smoke detectors is that they are capable of triggering even with a significant amount of dust and steam in the room. But meanwhile, they are very popular, although smoke sensors are not used in smoking rooms or very dusty rooms.

Flame detectors

Only triggered by open flame or a smoldering hearth. They are installed mainly in rooms where fire may occur without the initial release of smoke. They are also able to detect fires in initial stages, that is, in the absence of most factors, such as temperature changes and smoke. Flame detectors are used in production premises, characterized by significant heat transfer and dustiness.

Gas leak detector

These sensors are suitable for various applications, as they react to smoke, heat and even gas in the air. They operate on the principle of identifying a series chemical reactions. These detectors contain carbon monoxide particles, and the automatic settings can determine the ideal temperature of the monoxide, which, when changed, generates an alarm.

Combined sensors

Capable of detecting signs of fire in several ways at once. Basically, these are devices that have the functions of not only a smoke sensor, but also a heat sensor, thanks to which it is possible to specifically identify signs of fire and then notify people.

Installation and connection of security and fire alarm systems

1. You must determine required amount detectors. And for this you need to know the height of the ceiling of the room, as well as its area. According to the documentation, with a ceiling height of more than 3.5 meters and 80 sq. m. area you will need one detector, but safety rules state that even in a small room at least 2 sensors must be installed. Therefore, it is best to be guided by these standards.
2. Where the sensors will be installed, it is necessary to designate the location. The distance from the detector to the wall should be approximately 450 cm, while the gap between the sensors should be approximately 900 cm. This rule relevant for single-level ceilings with maximum height 350 cm. Wall detectors are installed at a distance of 200 mm from the ceiling.
3. The detectors must be fixed at the initially marked places, after which they are connected to the power source with 2-wire wires. The devices must be connected in series to each other. The resistor is installed in the block of the latest sensor.
4. After you connect the last detector, they need to be checked for functionality. To do this, you need to hold a flame from a lit match or candle near the detector.

Where and how to install fire detectors

The standards for installing fire alarm detectors are quite liberal: between sensors is 9 meters, from the wall - 4.5 meters. However, this placement is made solely for the sake of comfortable configuration of a particular fire system. In this regard, we can conclude that the installation and location of detectors is a more complex matter.

When installing sensors on walls, the distance must be at least 200 cm, otherwise they will give a false alarm because they will end up in a “smoke pocket”.

The sensitivity of the detector depends directly on the distance of the source of danger and it does not cover the entire hemisphere. In an empty room, the area monitored by the sensor depends only on the ceiling height.

By flame:

• Up to 15 sq.m. – from 6 to 9 meters;
• Up to 20 sq. m. – from 3.5 to 6 meters;
• Up to 25 sq. m. – 3.5 meters;
• More than 9 meters - it will be impossible to control, since the fire will become a fire, and the sensor itself will not work.

• Up to 85 sq. m. – this is up to 3.5 meters;
• Up to 70 sq. m. – this is from 3.5 to 6 meters;
• Up to 65 sq. m. – this is from 6 to 10 meters;
• Up to 55 sq. m. – from 10 meters.

However exact calculation The location of the detectors needs to be simulated on a PC or by a professional.

How the warning system works

When the detectors detect a fire, the fire warning system automatically turns on. According to their operating principle and composition, warning systems are divided into:

The notification function is implemented through output as well as input interfaces. To display information, alphanumeric and light indicators are used, as well as audible alarms.

Possible malfunctions after installation

Inadequate prevention is the main cause of fire alarm malfunctions. In other words, it is necessary to constantly carry out all preventive work. Smoke detectors often fail because various particles and other debris get into their chamber. However, there are cable breaks or system errors, which also cause malfunctions.

Considering the fire alarm system, the main problems are identified:

Often, significant damage to fire alarm systems is caused by dirty and very dusty work areas, high humidity or heat. Also, the reason for the failure of the alarm system is also trivial reasons, for example, broken cables, which is why the alarm can squeak, blink, and so on even without a fire. But the most serious cause of problems is still the intervention of unqualified specialists, amateur activities, or the end of the service life.

How to remove a fire alarm yourself

If the alarm goes off for no reason, it can be turned off completely. The most basic option is to remove the power (battery) from the sensor or disconnect the control panel from the network.

Attention! In this case, the fire alarm will become useless and will not be able to warn you about a real fire.

In addition, many fire alarms are equipped with additional power sources and a button located on the front side of the sensor, which will also need to be turned off. When you press the button, the device goes into alarm mode, and the sound signal is reset automatically.

The fire alarm can also be turned off using a centralized control panel, but for this you need to know the password. If you cannot find out the cause of the device failure, then solve the problem radically - cut the wires that go to the sensor, but in this case the device will stop working altogether and will simply resemble a decorative element.

Video: how to connect an alarm system with your own hands

Human safety is a top priority, no matter whether he is at work or at home. This can be achieved by installing an alarm system in combination with other devices. But in order for the alarm system to work as efficiently as possible, it is necessary to adhere to certain rules for design, installation and operation.

Alexei

Fighting fires is most effective when initial stage. But how to recognize them before the flames engulf large areas? Previously, for this purpose, fire towers were installed in every locality from which surveillance was carried out around the clock.

When the first sign of fire—smoke—appeared, a signal was given to the duty squads. But the effectiveness of this detection method was very low. Today there are special systems, successfully replacing humans. Installation of alarm sensors is possible in every room and even in open areas.

They detect the appearance of the slightest signs of fire and transmit a signal to the remote control. But in order for the alarm to work without failures, its eyes (detectors) must be installed in accordance with existing standards.

What does a fire alarm include?

This is a set of devices that detect signs of fire and inform people about the location of their occurrence.

The system includes:

• Fire detectors
• Receiving equipment
• Light and sound devices
• Communication lines
• Power supplies

Thirdly, the laying method. When choosing a wired system for an apartment, an important factor is the aesthetics of the room. Most often chosen hidden way gaskets, and this is another 10% of the total cost.

Fourthly, analogue ones also differ in price. Although, as a way to reduce the cost of the first type of alarm, it is possible to use a combined model.

Fifthly, integration with other security systems will add another 10%.

As you can see, there are more than enough factors on which the price depends. It is possible that installation carried out independently will save a certain amount, but it must be carried out taking into account all regulatory requirements.

Not everyone can afford to install a fire alarm with remote control. Most people prefer to do the installation themselves. In this case, you need to decide which rooms will be equipped with sensors. For example, gas detectors are installed in the kitchen or boiler room, smoke detectors in living rooms.

Next, choose where the sensors and other equipment will be installed and how the wires will be routed. And you can proceed directly to installation. Connecting the alarm sensor should be done with the power off, slowly, and carefully. After completing the installation, you need to check the operation of all detectors and the system as a whole.

After carefully studying all the information on installing a fire alarm system, you can do it yourself. This will save money, but...

Is it worth it? After all, the slightest mistake in installation can lead to disastrous consequences.

Timely detection of a fire can save the lives of many people and preserve valuable property. For this purpose, a fire alarm is used, the diagram and components of which may vary depending on the type of building and the tasks assigned to the system. Its main function is to promptly signal a fire that has started, after which it can be quickly localized.

Show all

Alarm purpose

Methods of notifying emergency situations have existed since ancient times. Many centuries ago, people transmitted information at a distance using fires, light signals, ringing bells or other far-reaching sounds.

In the modern world, this role is played by different kinds alarms. The principle of fire alarm operation is to record data about the state of the room using numerous sensors. If any readings differ from the norm, they are transmitted to the duty service, which as soon as possible arrives at the scene and puts out the fire.

Quick check of alarm loops

Among the additional functions of the OPS ( security and fire alarm system) may include:



Since the occurrence of a fire poses a danger to human lives and material assets, laws regulate the installation of fire protection systems. fire safety V administrative buildings. If there are no relevant regulations, the owners of the premises can decide for themselves whether to install an alarm system or not.



Devices used

Fire alarm systems include many devices. They can be divided into the following categories:

• sensory devices - sensors and detectors located in different places buildings and recording indicators environment;
• devices that receive and process data coming from sensor devices;
• a central computer or other control equipment that controls the operation of all other equipment;
• systems for informing people about an emergency situation.

Individual peripheral devices can be connected to the control panel. Here are some of them:

• sound and light alarms;
• message printers that print service and alarm information;
• Remote Control;
• module for short circuit isolation.

Arduino + IP212 fire detector (fire alarm)

The general alarm scheme is quite simple: sensors detect the start of a fire, transmit this information to a processing program, which reports the situation to the monitoring center.

The sensors involved in the system can be divided into two main types:

1. 1. Active - constantly emit a signal and record its immutability. If any changes occur in it, the situation is interpreted as a fire hazard.
2. 2. Passive - react to changes in the environment, possibly caused by fire.

The mechanism of action of these devices may also differ. According to their internal structure they can be divided into:

• infrared;
• magnetic red;
• combined;
• responding to glass breakage;
• enabling active switches on the perimeter.



Types of fire detectors

There are three main ways to understand that a fire has started: by recording a rise in temperature, the appearance of smoke, or a flash of bright light. There are other operating algorithms, but these factors are used most often. Based on this parameter, fire sensors are divided into four types:



Such devices can only collect data and transmit it to control system. Other types of devices analyze them and respond to the situation.

Alarm system Summer resident how to connect it yourself"



Smoke detectors

Since smoke rises to the top of the room when a fire occurs, smoke detection devices are usually located on the ceiling.

The internal part of the device consists of an optical system, electronic board and a detachable housing. These three elements are created separately in factories, automatically, and then assembled by hand.

To detect the appearance of smoke, use optical system, consisting of a photocell and an LED. The LED emits light all the time, directed at a certain point. The photocell is located slightly away from the beam of light emitted by the LED and converts the light flux incident on it into an electrical signal.

The principle of operation of the sensor is simple. When the air entering the device is clean and free of smoke, the light beam hits exactly where it was directed. However, with the appearance of smoke, the rays are scattered and begin to spread into different sides, including hitting the photocell. At this moment it is triggered and this signal is read electronic circuit, which transmits information to the fire alarm command post.




Due to the design of the device, it can work even when there was no fire, but instead of smoke, gases or water vapor entered it. In this case, the light flux will also be distorted, and main computer a fire alarm will be received. Therefore, when installing sensors, environmental conditions must be taken into account. The wrong place for them is the bathroom, shower room or kitchen. In addition, if there is constant smoking in the area, this can also cause a false alarm.

Since not all types of fire are accompanied by immediate and strong smoke, and the detector does not respond to changes in light and heat, it is installed in those rooms where fabrics are most likely to catch fire or the insulation of electrical wires is damaged. These businesses include electrical laboratories and substations, rooms with a lot of working electrical equipment in businesses, and warehouses where various goods are stored.

Thermal appliances

They are installed on the ceiling, where heat rises during a fire, and come in two types:

• recording the achievement of the heating limit value;
• analyzing the rate of temperature increase.

Initially, devices of the first type were invented, responding to temperatures above a given level. Models triggered when ruptured electrical circuit, occurring due to leakage of fusible material from the fuse. After this, a message about the fire was transmitted. Such detectors were disposable, since the first emergency damaged them forever. More advanced types are now being produced in which the fusible elements can be replaced after use. Other principles of operation of such devices are also possible.

The second type is integrated detectors. They measure the rate at which the electrical resistance of a metal changes as it heats up. The power supply supplies constant pressure to the terminals of the heat control element. After this, through a resistor and measuring device a current flows, the magnitude of which depends on the applied resistance. Under normal conditions, its value remains virtually unchanged.




But after the fire starts, the resistance of the sensor increases, and the current strength changes with it. When its fluctuations exceed a critical value, usually set at five degrees per second, a signal is sent to the receiving module that a fire has started. Such sensors best detect fires of carbon fuel, petroleum products, and solid flammable materials. They are installed in various industrial buildings, for example, warehouses of flammable materials or places where flammable liquids are stored.

Flame detectors

These devices are able to react to the occurrence of an open fire not accompanied by smoke. They are equipped with a special photocell that responds to a specific area or entire range of the wave spectrum.

Such devices are also not protected from false positives. The simplest models can mistake light for a fire fluorescent lamps, welding arc and even the bright rays of the sun. In addition, their operation is subject to electromagnetic interference in the optical spectrum. To combat all this, you can use special filters. Flame sensors are very rarely used in residential buildings due to their high cost. Their main area of ​​application is gas and oil industry.

Combined variations

Any type of sensor can give a false alarm by detecting a signal that does not indicate the start of a fire. Therefore, the most reliable are those that combine several different data catchers at once. Most often, smoke and heat sensors are combined, sometimes they are supplemented with a flame detection function.

In such devices there are simultaneously optical, thermal and infrared sensors. Typically, they can be configured to either provide an alarm when one of the parameters is exceeded, or a combined action that includes the simultaneous appearance of all signals.

There is also a more advanced technique that can additionally detect the appearance of carbon monoxide. Such four-channel detectors are usually used on industrial enterprises with an increased degree of danger.

Actions in case of fire

The fire alarm is designed in such a way that after receiving a signal about the start of a fire, a pre-developed action plan begins to be implemented. It consists of the following points:



Connection diagram

In order to protect people as much as possible in the event of a fire, the fire alarm connection diagram must be drawn up correctly. Using it, you can create a security system that is safe and effective. As a rule, it should be included with the alarm kit. It must be strictly followed, even small parts equipment operation. Correct scheme answers the following questions:

• gives information on how to reproduce the circuit;
• contains the composition of the system components and data on the features of their functioning.

Using it, you can not only install all the elements correctly, but also successfully modify or repair the alarm if necessary. A properly designed alarm system will help preserve people's health and avoid material losses.

A properly installed fire alarm is the key to the safety of your property and your own safety. There are several effective systems on the market today that operate on different principles. Explore the features available options, select the most suitable type of fire alarm, and then read the guide for calculating and installing sensors and what to do in case of a false alarm.

There are systems that use smoke and heat sensors. The principle of operation of the devices is clear from their name: thermal sensors They are triggered when the temperature rises, while smoke alarms are activated when smoke forms within the range of action. The sensors can be directly powered by special control and control devices or batteries.

Good for home addressable analogue system, and address-interrogation signaling. Installations of the addressable survey type find fires as quickly as possible. Modern addressable analogue alarms are able to determine the location of the fire and even take some actions, for example, turn off ventilation system, close or open everything in the house, turn on the sound alarm, etc.

Modern ones are available for sale fire alarms with built-in GSM transmitter. In the event of a fire, such a system will call or send an alarm message to a specified number. This will give the owner the opportunity to immediately call the fire department and personally come home. Modern GSM systems can be programmed to notify several telephone numbers, which is very convenient.

The nuances of installing and maintaining a fire alarm system

Fire detectors must be installed on every floor and in every room of the house. Attics and basements are also no exception. The best place to place fire alarm sensors is the ceiling.

You can install the sensors yourself, but if possible, it is better to entrust this work to a licensed company.

Once installed, the alarm system will need regular maintenance. If the sensors are powered by batteries, check the functionality of the controllers every month. The batteries themselves usually use up their life in a year. It is recommended to replace the sensors with new ones at least every 7-10 years.

If the system elements are powered from lithium battery, sensors also need to be tested monthly. If it is necessary to replace the battery with a new one, all warning devices must be replaced at the same time.

If the apartment or house has wired system, check its serviceability every month. The power supply needs to be changed annually. The service life of the entire system is on average 7-10 years.

During installation fire protection system pay special attention to the cross-section and location of the cables. Consider the fact that in the future you may want to redesign rooms or make basic repairs. Try to think things through so that any repairs can be performed without making changes to the alarm system configuration.

Provide reliable protection systems from various kinds unacceptable external damage (insect damage, chemicals etc.). The norms and rules for installing the systems in question are dictated by the relevant GOSTs. Carefully study the current regulatory documentation before starting installation work.

Buy equipment only from verified and licensed suppliers. Alarms of dubious manufacture usually behave unpredictably. For example, they often operate without any hint of a fire, but during a real fire they remain stubbornly silent. Therefore, do not skimp on your own safety and buy a high-quality system from a reputable manufacturer. All the same, the alarm system will not have to be replaced very often.

After installation, have your alarm serviced. To do this, it is better to contact a specialized company.

In preparation for installing a fire alarm, a number of special calculations must be performed. They will help you choose the most best option systems and avoid unnecessary costs during installation and maintenance of sensors.

One of the most important stages alarm calculation is definition suitable container power supply. Decide which energy source will be most convenient for you to connect the sensors to. There are quite a lot of such sources: from ordinary batteries to solar batteries.

The required battery capacity is indicated in the instructions for the alarm. Check the value found with the information on the battery case. If the battery capacity is not enough, purchase a more powerful battery or connect several batteries in parallel.

When parallel connection multiple batteries, make sure their voltage is the same. Otherwise total capacity battery circuit will decrease.

Check the required wire cross-section for connecting fire alarm sensors. This information is usually provided in the system manual. Also pay attention to indicators such as battery capacity for standby and alarm modes. Add these values ​​up and you will get the total required battery capacity specifically for your system.

Connecting an alarm using the example of typical sensors

First stage . Define required quantity alarm sensors. To determine the required number of controllers, you need to know the area of ​​the room served and the ceiling height. In the current regulatory documentation it is said that if the ceiling has a height of no more than 350 cm, then one sensor is sufficient to service 80 m2. At the same time, fire safety rules require that even in the most small room there were at least two controllers. Follow the last rule.

Second phase. Mark locations for installing fire detectors. Maximum permissible distance from the wall to the sensor regulatory documents is 450 cm. The sensors themselves must be installed in increments of at least 900 cm. This rule is relevant for situations where the ceiling is single-level and its height does not exceed 350 cm.

Wall-mounted models of fire sensors should be placed at a distance of 200 mm from the ceiling surface.

Third stage. Fix the sensors at the marked places and connect them to the power source using two-wire wires. The sensors are connected to each other in series. You need to install a resistor in the terminal block of the last controller.

Fourth stage. Test each sensor after connection. To do this, light a candle and pass its flame near the detector.

If the fire alarm goes off without any sign of a fire, you need to perform several simple actions to turn it off. Otherwise loud sound alerts and triggering unnecessary additional funds will cause you a lot of trouble.

First option. Find out why the alarm went off in the first place. You cannot turn off the system without first checking all serviced premises. Quality systems extremely rarely they work without any reason. Maybe there was smoke or a real fire in some room of the house. If there is an “irritant”, eliminate it, and the system will turn off on its own. Be sure to check the condition of the electrical wiring.

Second option. If you have not found any reasons for the alarm to go off, proceed to turn it off. The shutdown procedure depends on the type of specific system. The simplest option is to disconnect the alarm from the power source. However, this option can be considered solely as a temporary solution to the problem, because With a disabled alarm, you are jeopardizing the safety of your home and everyone in it.

Third option. If your home has a centralized control panel, turn off the alarm from it. In some situations, this procedure requires you to enter special code. If you don't know it, contact the company that services your fire alarm.

Fourth option. If the controller becomes very dusty, for example, when repair work, to turn it off, it will be enough to remove the front panel from the sensor and rub its “insides” with a cotton swab lightly moistened with alcohol. If this was the problem, after such cleaning the alarm will turn off. From now on, monitor the condition of the sensors and clean them promptly.

Fifth option. If you need to turn off the fire alarm in a particular room, you can wrap the sensor with adhesive tape. However, after such processing, the controller will become useless. Remove the tape immediately after identifying and correcting the problem.

Sixth option. If none of the above helped, use the most radical solution - cut the wires connected to the sensor. The fire alarm will turn off, but will become completely useless until you repair it. Try to figure out the cause of the false alarms of the sensors as quickly as possible and eliminate the malfunctions.

If this is possible, contact a specialized company. Its employees will diagnose the fire alarm system and give recommendations on further actions from your side.

Thus, in self-installation There is absolutely nothing complicated about fire alarms. You just need to understand in detail the sequence of connecting the sensors and follow the instructions. Be sure to check the manufacturer's recommendations. Many modern systems have a number of features that need to be clarified separately. Your safety depends on the correct installation and connection of sensors, remember this.

Good luck!

Video - DIY fire alarm installation