Як спустити повітря з системи опалення

Air in the heating system impedes the circulation of water. Because of this, individual batteries or even entire risers will not heat up. In addition, due to the fact that water with air plugs in it can move along the contour in jerks, the likelihood of water hammer increases. Therefore, it is important to understand how to deflate the air in the heating system.

Causes of air plugs formation

People usually encounter air plugs immediately after the start of the heating season. As soon as the heating in the house starts, some residents may complain about the lack of heat in the apartment. There are many reasons for this. Most often it is:

• incorrectly designed or installed heating system (the highways are made at a slope, not all batteries are equipped with a Mayevsky valve);
leakage of the system; breakdown of the automatic air vent valve;adding a new portion of water to a working system.

Ways to remove air Proper planning and installation, periodic cleaning and accurate filling with coolant will help to avoid the formation of air locks in the system. But even if air appears, you can use one of the methods described below.

Use of an expansion tank

In a system where the coolant circulates naturally, the expansion vessel helps to remove air. When installing the system, the main line should rise vertically to the expansion tank.

At the top point, a container is installed where the coolant can expand when heated, ensuring the natural movement of the liquid in the circuit.

The return line is installed at a slope. This will allow the coolant to move naturally in the system.

If the system is done correctly, the air that enters the coolant will be displaced by the flow of hot water and leave the pipeline, bypassing the expansion tank.

Installation of air venters

This method is used in systems where the coolant is forced to move. An open-type expansion tank is mounted at the top, and a closed-type expansion tank is mounted at the entrance to the boiler.

There should be no slope in the straight pipeline. To move the water inside, a pump is used in conjunction with a device that discharges air plugs. Such air vents are located at the very top of the system and at the turns of the circuit.

Removing air from the radiator

Mayevsky's crane is a device used when it is necessary to remove air from the radiator.

The air venting process is very simple. To do this, just open the tap and wait until the air plug comes out of the system. This happens with a characteristic hissing sound. The tap is closed after water flows out of the radiator opening. This procedure is used to evenly distribute heat over the surface of the battery.

Additionally installed automatic air vents will work if the pressure inside the system changes. They can be vertical and horizontal. They are mounted where there is a high probability of forming a plug (loops, pipe turns).

In closed heating systems, automatic air vents are always installed. They are mounted at certain points of the circuit, which makes it possible to locally remove air at the stage of its movement to the highest point of the circuit.

Use of an air separator

This device is suitable for large autonomous heating systems. Its function is to select air in the system with its subsequent removal. The separator usually has a separator sludge. Working together makes it possible to save space and manage impurities (rust, sand) by removing them from the system.

The separator is a metal cylinder. It has an air vent on top and a sludge discharge valve on the bottom. A mesh is soldered to the tube, which is located in the center, and vortex water flows through it. This allows air bubbles to rise up, exiting through a special chamber. A drain valve is used to remove filtered debris particles.

Correct filling of the system

To avoid the appearance of air in the heating pipes, the system must be properly filled with water. This is done as follows:

All fittings are opened, except for the drain.
1. All taps on radiators are turned off, except for the last battery in the loop. Simultaneously, two taps on the first radiator from the boiler slowly open at once. This should be done as slowly as possible. Using Mayevsky's crane, air is released from the inside.
2. The same manipulation must be performed with all radiators.
3. Bleed the air in the circulation pump (unscrew the air screw of the pump).
4. The heat generator and circulation pump are switched on.
5. After the water in the system begins to heat up, the radiator taps are reopened with the air removed from them.

Prevention of air in the system To avoid the formation of airiness in the heating system, several devices are used:

• air separator;
• Mayevsky's crane;
automatic air vent.

They help to avoid the formation of air jams. In addition, you need:

• periodically check the system for leaks;
• follow the rules for installing the heating system and filling it with water.

Knowing what provokes the appearance of airiness and how to drain the air from the heating system, you can avoid disruption of its operation and other serious problems associated with the formation of air plugs.