In order to heat a country house or cottage, a gas boiler is perfect. It is one of the popular heat units that are used for space heating. An important advantage of this equipment is that it runs on gas. It is currently the most economical fuel used for space heating. In addition, gas has a lower cost than other fuels. In order not to get confused in various heating equipment, it is necessary to study the device of a gas boiler and its components. Only then can the correct choice of heat generator be made. The device of the gas boiler of each type is approximately the same.
Equipment items
The main elements will be as follows:
- The gas burner is a rectangular structure with nozzles inside. They serve to supply gas to the combustion chamber, and also provide a uniform flame, due to whichuniform heating is achieved.
- A box with radiators acts as a heat exchanger. Inside it are pipes with a coolant, as a rule, it is water. When a gas burns, heat is generated that is transferred to the liquid. The device of a double-circuit gas boiler is distinguished by the presence of two heat exchangers - primary and secondary.
- To ensure pressure on the heating line, a circulation pump is used. This technical element may not be in all types of gas boilers.
- If there is an intense heating of the coolant, then it is necessary to divert it for a while. This is what the expansion tank is for.
- An important point is the removal of combustion products. They must be removed from the boilers using natural draft or a built-in fan.
- The automation system includes a gas boiler control unit, which is carried out using various sensors.
Gas valve
These elements are provided in wall-mounted and floor-standing units. The gas boiler valve device is designed to regulate the gas supply to the burner. That is, elements are opened and closed at the right time.
Floor Gas Boiler
Installing this type of heating unit is necessary subject to the availability of funds for its purchase, as well as sufficient space.
The room must meet all technical requirements. The device of the floor gas boiler is quitesimple. The only difference from other types is the presence of a double-circuit heat exchanger.
Advantages and disadvantages of floor boilers
Among the advantages of such structures are the following:
- no need to add combustible material, as the boiler runs on gas;
- efficiency is quite high compared to fuel costs;
- thorough heating of large areas.
Negative points include the following points:
- to install this type of gas boiler, it is necessary to collect the relevant documentation, which takes a lot of time;
- impossibility of installation close to the building envelope;
- the need to equip the room with special ventilation to remove combustion products.
Wall mounted gas unit
Remaining compact, such installations can perform the functions of an entire boiler room. The device of a wall-mounted gas boiler is no different from the floor type, except for overall dimensions.
Pros and cons of wall units
Among the advantages of this type of gas boiler are the following:
- compact size, which allows you to install it together with other appliances or pieces of furniture;
- the boiler package includes all the necessary elements, installation of additional bulky equipment is not required;
- if there was no gas for a long time, then the device can be easilyreconfigure to use gas bottles.
Like every unit, the wall-mounted boiler has its drawbacks:
- The device of gas heating boilers does not allow heating a large area of \u200b\u200bthe room.
- The presence of sensitivity to the chemical properties of the coolant. If you do not install an additional softener, the heat exchanger will quickly fail. And its replacement is quite expensive.
- If the gas heating boiler device provides for a two-circuit system, an additional tap must be installed. In the open position, it serves to cool the coolant. Water supply starts 10 seconds after the tap is opened.
The difference between wall-mounted equipment and outdoor equipment
The floor-type gas boiler device is different from wall-mounted products. This is expressed not only in cost, installation conditions, but also in technical parameters. They determine the type of boiler. In addition, outdoor models have a longer service life. This characteristic directly depends on the material from which all structural elements are made. As a rule, boilers are made of a thick layer of cast iron, so that they do not corrode for a long time.
The design of the unit provides for several types of burners: atmospheric and ventilation. The first type is inexpensive and easy to operate, and also does not cause much noise. The second type of burners is most often found in mounted boilers. They cost more, but they haveand more power.
Protection system
The protection system is an important issue when choosing such equipment. When the electricity is turned off, modern gas boilers stop and continue to work automatically when the power supply is restored. In the event of a gas shutdown, only the burners close automatically. After that, the system is started manually, since there is no automatic method.
The device of the AOGV gas boiler provides for the installation of frost protection, as well as energy-saving equipment. Thanks to the sensors, the temperature of the coolant is monitored.
When it drops to 5 ºС, the gas boiler turns on to warm up. As you know, heating in the summer season is not required. Therefore, in order not to break the rotor, it is necessary to turn on the pump. For this, boilers have a special function.
Diagnostic systems are installed in modern devices. They can independently perform an analysis of all elements and provide information about the general state of the system. Such models check up to 90% of all equipment. This allows experts to quickly replace or repair a specific device.
Cost of heating boilers
As mentioned earlier, the price of wall and floor boilers is different. So, the cost of wall models ranges from 28,000 to 150,000 rubles, and floor models - from 30,000 to 40,000 rubles. Do not forget that to install the floor unit, you need to assemble the packagenecessary documentation and equip a special room, which will result in additional financial costs.
Design and operation of a gas boiler
You need to start with the fact that there is a thermometer in the room that measures the air temperature. If it falls, then the three-code valve switches to the "heating" position. Then the circulation pump starts working, and the water begins to move through the heating system.
Then the gas valve opens and the burner ignites. Heating of the coolant occurs due to the release of energy during the combustion of fuel. To measure pressure and temperature, the design includes a thermostat and a pressure gauge. When the air temperature reaches the required parameters, the pump turns off by itself. Over time, this heating process is repeated. With the constant operation of the pump, round-the-clock heating of the coolant occurs, which transfers its heat to the heating devices.
Automation system
The built-in automation system plays a huge role in the functioning of gas boilers. It controls the operation of the unit in all modes and consists of the following elements:
- sensors that regulate the height of the flame in the burner, as well as its temperature;
- system for turning the boiler on and off in the event of a power outage;
- sensors that regulate gas pressure in the event of failures in gas supply;
- devices that serve to protect against freezing, this is relevant for the cold season, whenit is necessary to dismantle the boiler;
- equipment for turning on the circulation pump when the system is not used for a long time;
- system for self-diagnosis and detection of errors in the operation of individual elements.
If you know the device of a gas boiler, you can easily choose the right model, while saving money both during purchase and during operation.
Reviews
The opinions of users of wall and floor boilers are divided. After all, these designs have a number of differences. So, a wall-mounted unit cannot heat a large area of \u200b\u200bthe room than a floor-standing counterpart. Therefore, people choose gas boilers, starting from this principle.
So, users of wall devices highlight a number of advantages. So, in their opinion, such units have small overall dimensions, which allows installation together with other elements. The negative side is the sensitivity to the coolant. If the water is of poor quality, the heat exchanger can quickly break down. Its replacement is quite expensive.
Floor-mounted boilers are superior in technical characteristics to wall types and are used to heat a large area.
The only downside that many users have pointed out is the installation process. For the installation of equipment, it is necessary to allocate a separate room, since it is quite large. You also need to collect certain documents, which takes a lot of time. Another important point is the removal of combustion products. In the room whereunit will be installed, natural or mechanical ventilation should be provided.
Conclusion
The gas boiler is an important element of the heating system. It is he who heats the coolant, which subsequently enters the pipes and radiators. Working on a type of fuel such as gas is the best option for creating comfortable indoor conditions. So, we found out the device of a gas boiler. We hope that this information will help you choose the right device.
