Why is an air congestion formed in the heating system and how can I get rid of it? This is one of the most popular questions that are of interest at the time the heat starts.
What is a traffic jam?
In the summer, the heating system is at rest, and the last floors are practically not filled with coolant, that is, air is in the pipelines and radiators. The heat start procedure is a very important point, and if it is carried out incorrectly, then excessive accumulation of air is the air lock in the heating system.
How is education?
The correct start-up of the heating system is one in which it is filled through the return line by means of a feed pump. When filling the system through the return line, the filling process is carried out from the bottom to the top, the coolant gradually begins to fill all pipelines and heating devices, excess air rises. As a result, it is very easy to lower it from the system using air collectors located at the highest points.
However, the process, sequence and incorrect start-up is far from the only reason that an air congestion forms in the heating system. During the operation of the heating system, air is sucked in through the flange, threaded connections, as well as the remaining leaks, which leads to the formation of a plug.
Effects
What can happen if the heating system starts to fill up through the supply line through which the coolant moves under normal conditions during the operation of the system?
Rising up the main riser, the coolant begins to spread along the supply upper line, and then sinks to the lower points. However, on the way to the upper parts of the heating system, it gradually moves to the accumulated air, and under the influence of gravity all the air goes down. The result is a dense air lock in the heating system.
Under the influence of the coolant and gravity, the air goes down, thus completely filling the space of the risers and radiators, which can completely deprive some heating devices and risers of circulation. In other words, the coolant will circulate in the system, bypassing some heating devices.
It turns out that the individual elements will remain completely cold due to the fact that an air congestion has formed in the heating system. How to get rid of it in this case? With such a filling system to bleed air is quite problematic. Therefore, if an incorrect start was performed, the only way to get rid of air is to drain the coolant into the sewer system and restart it through the return line.
Air vent in radiators
So, first of all, you should stop on the descent of air from heating devices - radiators. In this case, you should use the already proven option: bleed air through the Majewski tap. This faucet, as a rule, is installed instead of blind plugs on the radiator, at the highest point. This arrangement implies the accumulation of excess air directly below the valve. In other words, when it is opened, the first thing that comes out is the air, and then the water goes out, which will indicate that the plug in the heating system is completely eliminated.
To do this, you only need to substitute a container into which a small amount of liquid will drain, leaving together with the air. Open the tap and wait for the moment when only water goes, without characteristic sounds with air bubbles.
Manual air bleed at the top of the system
As for the first case, for draining the excess air will require specialized units that were previously installed in the heating system. So, at the highest points of the system, in most cases, ordinary valves are installed, through which air is released, like Mayevsky's taps. This option can be described as manual descent.
Automatic air release
Also, the descent can be automatic, as it accumulates at the top of the system air. In this case, an automatic type air vent is installed.
The principle of operation is as follows. When air begins to accumulate under the shut-off valve, the float ensuring the closure of this valve is gradually immersed in a liquid, the level of which, with the appearance of an air plug, accordingly, begins to decrease. As a result, the valve opens, and the air plug in the heating system of a private house disappears. The level of coolant rises, the float floats, and the valve again blocks the leakage of water into the external environment.
Venting through the plug
If there are no taps on the heating devices, such a problem as an air plug in the heating system of a house is complicated many times. You will need to untwist one of the stubs.
- For these purposes, a large adjustable wrench should be prepared . Under a cap it is necessary to substitute capacity.
- Next, the cap captures the key and turns it very neatly.
- It is unacceptable to completely unscrew the plug, since there can be high pressure in the heating system, the coolant will go directly to the room with a high pressure, and it will be problematic to cope with the current situation. That is why the plug should be turned with extreme caution.
- It is advisable to first turn off all available equipment in the room, close the window and door openings tightly . In the process of turning the plugs you need to listen. If a small hiss appears, do not turn the plug further.
- At this point, you need to stop and set aside the key. Now you should wait for the excess air from the heater to gradually but completely leave the system. It is very simple to determine that a plug in the heating system is out - liquid will start to leak from under the plug.
- Then, using a large adjustable wrench, it is necessary to smoothly and accurately return the plug to its original position.
Air discharge from the apartment heating system
Speaking about the features of air descent, we should dwell on the sequence of the algorithm of actions. So, the air congestion in the heating system of an apartment building is eliminated in the following sequence:
- First, air descends from the closest to the boiler and lower elements of the heating system.
- Lastly, air comes down from the devices that are highest in relation to the ground level and are remote from the boiler.
Conclusion
After the above manipulations, the circulation of hot water in the heating system should be fully restored, and the radiators should again become hot. If some risers or radiators still remain cold, it is most likely due to poor circulation, incorrect start of the system, or improperly connected radiators.