Airing the heating system in a private house. Causes of airing. Why does air accumulate in the heating circuit
Every person should be aware of such a problem as airing the heating system. Sometimes a tenant apartment building paying regularly utilities, can not understand why he has cold batteries? And the reason is the ingress of air into the heater. The formed air plugs prevent the flow of the coolant.
Causes of airing
Airing can occur due to bubbles, which, when heated, can form air dissolved in water. Bubbles rise and accumulate at the top of the pipeline. (See also: )Air can get into the system due to a pressure drop in it, resulting in a partial discharge of the coolant. This situation may arise due to leaks and descent of the coolant from the system during repairs.
How to get rid of airiness
Air bubbles collect at the top of the system. In order to remove air at these points, air collectors are installed. By execution, they are horizontal and vertical flow, vertical non-flow. The air lock from the top of the air collector can be removed manually using a valve or using automatic air vents.Depending on the type of heating system, air removal must be started either by opening the Mayevsky tap, or - tap. If neither air nor water comes out of them, then this is evidence of clogging of the first and malfunction of the second tap. If the taps are working, but neither air nor water has appeared, you need to check the performance of the valves located on the riser. To do this, you need to block the necessary part of the heating by closing the valve or valve on the wing in the basement.
In order to check and troubleshoot the valve on the riser, you need to unscrew the valve body cover and change and fix the hard rubber gasket. After that, the body is installed in place and the lid is wrapped. After troubleshooting, the valves must be closed.
In the event that all the actions taken did not lead to the desired result, you need to start looking for a blockage in the riser or pipes leading to the heaters.
Modern methods of combating air pollution
Of the modern methods for solving the problem of airing, first of all, we can name the installation of automatic air vents of various designs. The air vent is mounted on the return stop valve. This is done in order to prevent leakage of the coolant when changing the device. After filling the system with coolant and carrying out hydraulic tests it is necessary to unscrew the plug of the air outlet device by half a turn.The relevance of the use of devices designed for air release increases with an increase in the number of buildings that use autonomous heating systems. (See also: )
German scientists proposed to use the new Reflex Servitec apparatus to combat airing of cooling and heating systems, which provides automatic deaeration throughout the system.
By itself, the problem of airing does not go away, so it is necessary to look for the causes of its occurrence and ways to deal with it.
The use of materials is allowed only if there is an indexed link to the page with the material.
Airing the system
The air that has entered the heating system is the reason that the heating will not work correctly, and some of its sections may even fall out of the circuit. That is, it turns out that the airing of the heating system is a negative factor that must be disposed of by any means. How to do this, what are the reasons for this process, is it possible airlock delete by hand? These and other questions will be answered in this article.
At the very beginning, we will determine exactly why the airing process is bad.
- The heat output of the system in general and sections separately is reduced.
- The coolant circulation is reduced or completely absent.
Even these two factors are already enough to reduce the efficiency of heating to a minimum. And this usually leads to energy overruns and high financial costs, not to mention such an indicator as comfortable living in a poorly heated house.
Causes of air in the system
There are three such reasons:
- Depressurization of risers during their repair. Very often in the summer, all heating services begin to carry out preventive maintenance of heating systems and their repair. Pipes are usually replaced shut-off valves, radiators and so on.
- Coolant drain. Again, this applies to repairs. But most often air enters the system during the process of purging and pressure testing.
- Violation of the integrity of the contours. The deformation of the contours, especially the pipe part, gives the effect of air getting inside.
How to deal with airing
The issue indicated by this section worries many residents of private houses and owners of apartments on the upper floors. Thankfully, this is no longer a problem. Scientific and technological progress has given many ways, or rather devices, with the help of which air can be bled from the heating system. This can be done manually or automatically. The most important question is “how?”. Therefore, we will consider each device separately.
Mayevsky crane
This is a small device that is installed in the end heater. A special fitting is installed in it, unscrewing which, you open access to the heating battery. And since air usually accumulates in the upper part of the radiator, the Mayevsky crane was also installed in the upper pipe instead of one of the fittings.
Mayevsky crane
Some may ask why an air vent is needed if the heating of city apartments is a system with forced circulation of the coolant. It will still punch through. No one doubts, but the air will interfere, hence the poor circulation, and, therefore, the inefficient operation of the system as a whole. Therefore, whether you like it or not, you still have to bleed the air. We add that air accumulates at the very top of any system, and the upper end of the radiator is the highest point when it comes to heating in a multi-storey building. Therefore, the Mayevsky crane is usually installed in the apartment of the top floor.
Most importantly, with the help of this simple device, the residents themselves began to bleed the airlock without calling plumbers. Instructions on how to do this are available today on many sites, including ours. So it makes sense to get acquainted and apply knowledge in practice.
Very often in high-rise buildings Mayevsky's cranes are installed specifically on technical floors, which are located at the very top of the building. To do this, a riser is brought to this floor and a relief valve is installed into it using a branch pipe with an internal thread. This is done in order not to disturb the residents of the house, that is, the process of bleeding air takes place outside the apartment.
Air separator
Air separators
This is a very unique device. If the Mayevsky crane removes the air plug, then the air separator removes the air dissolved in the coolant. Feel the difference? It is this technology that allows you to install the device anywhere in the heating circuit.
The process of removing the air mass is carried out by converting it into bubbles, collecting them and bringing them out. In fact, this device is part of the separator unit, which is installed in the basement of the house. Currently, manufacturers offer an improved design of this device. Most likely, this is a double separator, one part of which is responsible for collecting debris and sludge, the second for collecting air. So to speak, two in one. At the same time, both compartments work efficiently, plus it turned out to save materials for their manufacture, which was reflected in the price of the device, and save installation space.
The only thing I would like to note is that air separators are usually mounted in buildings where a central heating network is used. AT autonomous heating their use is unprofitable.
From the name itself, it already becomes clear that this mechanism does everything by itself without the direct participation of a person. How does he work.
- The coolant passes through the internal cavities of the air vent, where a special plastic float is installed.
- This float is connected by means of a flag with a rod, on which a spring presses on the reverse side.
- When filling the inside of the body with water, the float presses on the rod, which blocks the access of air into the system.
- If there is no coolant inside, then the rod opens the passage.
Automatic air vent
I would like to note that all modern air vents operate according to this principle of operation. We add that this device has a fairly long service life, if properly installed and operated. True, it does break down.
- Most often, they all occur due to the poor quality of the coolant. For example, a salt deposit forms on the needle of the rod, which does not allow the passage to be blocked completely. Hence the leaks and the incorrect operation of the entire mechanism. It is easy to repair this defect. You just need to remove the cover of the device, get to the needle and clean it.
- The junction of the cover with the body begins to leak. Defect - leaky gasket. It just needs to be replaced with a new one.
Conclusion on the topic
So, in this article, the reasons and methods for airing the heating system at home were analyzed. Why does this happen, and in what ways can air be expelled, why does it accumulate, and so on. Note that today there are a large number of tools with which you can easily answer the question of how the heating system is aired, and how to deal with this problem.
We have analyzed the three main mechanisms currently used in heating systems houses (private and multi-storey). All of them are quite effective and do not require any complex manipulations. Therefore, we choose one of them and solve the problem with airing.
They are an important communication element of any residential building. The efficiency of their work is determined by many factors, one of which is the presence of an air lock in the pipes. This problem is encountered quite often.
But, despite its prevalence, eliminating the airing of the system is not a difficult task. Below we will consider ways to solve this problem and the causes of its occurrence.
Negative consequences of airing
A similar phenomenon leads to a decrease in temperature indicators not only in a separate section of the circuit, but also in the entire system. This is due to the fact that the accumulated air interferes with the normal circulation of water in the system, sometimes stopping this process completely. These conditions not only reduce the efficiency of operation, but also significantly increase the amount of coolant used, making such operation of the system economically unprofitable. In addition, the temperature in the room drops significantly.
Why does air accumulate in the heating circuit
One of the most common causes is a violation of the sealing of the system. This happens during repair work, when the replacement of individual elements can be carried out with violations, leading to depressurization.
Often air enters the pipes when draining the system. But the most common reason leading to such consequences is purging and pressure testing of pipes.
To solve problems with the integrity of the system, both manual and automatic methods are used.
Mayevsky crane
This device is a mechanism installed at the end of the radiator, which makes it possible for the coolant to enter directly into the battery. Considering that air penetration occurs through the upper part, this device is mounted in the upper pipe.
Not everyone understands why the Mayevsky crane should be installed in multi-storey buildings where the coolant is circulated by force. Despite the fact that the airing of the system in this case will be minimal, it will significantly reduce the efficiency of the movement of the coolant, which will lead to a decrease in the temperature in the room.
Such a device makes it possible to clean the system yourself. This process is not difficult, and information on how to properly bleed an airlock can be easily found on the net.
It is more rational to install a Mayevsky crane on technical floors. This location makes it possible not to depend on the residents of the upper floors and produces everything necessary work immediately as needed.
Air separator
The following device differs in the principle of operation. It removes air dissolved in water. This principle of operation makes it possible to mount the device on any part of the heating system.
The operation of the air separator is based on the process of converting air into bubbles and then removing them from the system. There are currently improved models on the market. Their functions are not only to collect air, but also to trap debris in the system. The device of such a separator consists of two compartments. But, despite this, the cost of the device did not increase, which is associated with the economical use of materials.
Automatic air vent
This type of device does everything on its own. The principle of operation is that when water passes through the device, a spring connected to it presses on the float installed inside, which in turn is fed to the flag with a drain. When water fills the housing, a spring is activated, which prevents air from entering the system.
Air vents are characterized by high reliability. Among the causes of breakdowns of this device, the most common is their work together with a low-quality coolant. This leads to the appearance of various deposits on the inner surface of the device. You can fix this problem just by cleaning the space under the air vent cover.
Summarizing
In conclusion of the article, we can say that although the problem of airing the system is quite common, its solution does not require significant efforts and expenses. First of all, it is necessary to determine the cause of the problem in order to choose the right devices.
In case of insufficient experience, it is better to seek the help of professionals who will quickly and efficiently eliminate the problems that have arisen.
But as experience shows, with such a nuisance as airing the system, you can handle it yourself. The main thing is to follow the stages of the technological process, which will allow not only to gain some experience, but also to avoid additional costs.