The boiler does not heat the batteries
Often, a two-pipe heating system does not heat due to the low heat transfer rate of the boiler exchange circuit. This leads to a decrease in the temperature regime and, as a result, a loss in the efficiency of the entire system. Not every boiler model provides for an easy way to dismantle the heat exchanger. If the heating does not heat well due to the appearance of plaque on the internal elements of the boiler, you can flush without this procedure. To do this, you need a pump with a filtration system. The procedure for cleaning is as follows:
- Disconnecting the boiler from the general heating system;
- Connection to the inlet and outlet pipe of the pump hoses;
- Filling a special cleaning liquid into the boiler heat exchanger;
- With the help of a centrifugal pump, the rate of passage of liquid through the boiler is increased.
After that, the heating batteries should not heat up badly.
Particular attention should be paid to the flushing liquid. It must not harm the metal elements of the boiler and the system.
Therefore, at the end of the procedure, rinse the entire system with distilled water.
To avoid the appearance of scale, before pouring water into the heating system, it is necessary to reduce its hardness index. The use of running water is not recommended as it contains large amounts of calcium and magnesium bicarbonates. They are the main source of lime scale not only in the boiler heat exchanger, but also in pipes and radiators.
The principle of operation of the boiler
To understand the causes of the breakdown, you need to understand how the boiler works. Double-circuit devices "Ariston", "Baksi" and other models have several blocks. Ignition and combustion take place in the gas node, the water node is responsible for the water supply and pressure in the line. The chimney block brings combustion products to the street.
As soon as you start the boiler, a pump is activated that pumps water into the system. The gas valve opens. The liquid circulates through the tubes of the heat exchanger, and the burner evenly warms up its body. Sensors control the heating process. As soon as the temperature reaches the set temperature, the gas supply is turned off, heating stops.
When the mixer is opened, the flow sensor is triggered. It gives a signal to the board to switch the three-way valve to DHW heating. When the mixer closes, the valve switches to the heating system. Some models are equipped with a "quick start" mode. Then the valve periodically switches, heats up both the first and the second heat exchanger.
The radiator does not heat up
Most often, problems with normal heat transfer occur in heating radiators. This is due to their specific design - the coolant does not move through one pipe, as in the transport line, but is distributed over several.
In what cases does the heating radiator not heat up? There are several factors that directly affect the correct operation of the battery.
Air pockets in heating
There are several reasons for the appearance - exceeding the temperature regime, evaporation of water, etc.
It is important that the consequence of this is the appearance of places in the line that are not filled with coolant. Most often these are radiators.
To eliminate them, it is necessary to install a Mayevsky crane - an air valve that releases excess air from the device.
How to determine why the heating radiator does not heat well? The simplest method is the temperature difference on the surface. In the place of formation of an air lock, it will be much lower, thereby preventing the normal passage of the coolant. To fix it, follow these steps:
- With the help of a screwdriver or a rotary lever, the Mayevsky tap is opened;
- Add water to the system until the coolant begins to flow out of the tap together with air;
- Shut off the water supply.
After the surface of the radiator should heat evenly. Otherwise, repeat the procedure.
Incorrect installation and limescale in pipes
The efficiency of its operation depends on the correct installation of the radiator. It should not be inclined relative to the plane of the floor and wall. If this condition has not been met, then the question will inevitably arise - why the heating battery does not heat up.
To check the correct installation of the radiator, you can take a standard building level. If the upper plane of the battery has deviations, re-installation should be performed. It is best to use new reinforced mounts for this.
If, after this, the question of why the heating radiator does not heat up remains unresolved, it is recommended to flush the heating system. This problem is relevant for old pipes and radiators made of steel and cast iron. Over time, a lime layer accumulates on the inner surface, preventing the normal flow of the coolant. There are several ways to perform the flushing procedure:
- Hydraulic. A special pump is connected to the system circuit, which creates a large pressure of water. Under the influence of this force, the scale is broken into small fractions and retained in the pump filter;
- Chemical. Special additives act on limescale, which loses its uniformity and flakes off the inner surface. Subsequently, hydraulic flushing is performed to remove residual debris.
Experts recommend using an integrated method to solve the problem in which the heating battery does not heat up. After checking the correctness of the installation, the system is flushed, and then the correct filling is performed with the Mayevsky tap open.
If a two-pipe heating system does not heat up due to clogged pipes, you need to carefully choose the cleaning technology. For pipelines made of polypropylene, chemical cleaning cannot be done.
