The better to flush the gas boiler heat exchanger. How to clean a gas boiler: a procedure for each node and a do-it-yourself cleaning video

If desired, you can clean the heat exchanger of a double-circuit boiler with your own hands, without resorting to the services of specialists. This procedure does not take much time, and besides, you do not need to spend extra money. The main thing is to follow some rules and know the principle of operation of a gas boiler. After spending only 2-3 hours, you can qualitatively clean the equipment from contamination.

A gas boiler heats water by burning gas in it. The heat exchanger of the building is a copper or steel curved pipe. When the gas is converted into energy, the heat exchanger also heats up, transferring heat to the heating system. Heating is carried out thanks to special plates, they also help to raise the temperature and direct it to one of the circuits of the two-circuit system.

The heat exchanger is made from the following materials:

• Copper;
• Stainless steel;
• copper alloys.

This is due to the fact that copper and its derivatives conduct heat well.

These plates tend to be covered with deposits due to contact with water, so they must be cleaned every two years before turning on the heating for the winter.

If the water is hard enough, you will have to clean the heat exchanger from scale once every 2 years. You can do it yourself by preparing the necessary tools in advance.

Cleaning methods: how to clean a gas boiler

In order to avoid overheating of equipment parts, breakdown and increase in fuel costs, periodic flushing and cleaning of the heat exchanger and other elements is required.

The heat exchanger can be cleaned in several ways:

• Manual cleaning, involving the removal of the coil, it can be carried out mechanically or you will have to flush the pipe with a special composition that dissolves salt;
• Cleaning with an acidic liquid using a booster;
• A variant of hydrodynamic washing with the use of increased pressure is possible.

Manual cleaning is done with a stiff brush and a vacuum cleaner. For a double-circuit boiler, you should use an anti-salt liquid from limescale. First, the coil is removed, and after the procedure it returns to its place. Particular attention must be paid to checking the tightness.

You can also clean the pipe with a booster. To do this, a special solution is passed through it, which is able to remove even deposits of iron compounds. In the end, the acid is neutralized by another liquid, which is driven through the pipes.

The hydrodynamic method allows you to effectively destroy plaque and deposits by increasing pressure and using abrasive substances pumped into the coil.

Procedure: how to clean the boiler from scale, soot and soot

If you decide to do the procedure for cleaning the structure with your own hands, before doing work at home, you need to turn off the electricity, turn off the gas, close all the valves of the heating system and boiler.

All actions should be carried out carefully, disassembly and assembly requires special care:

• The boiler cover is removed;
• Next, you should remove the gas burner, remove dirt in the form of soot from the electrodes, you can wash the surface with water and detergent, rinse;
• Clean the injector, nozzles with a brush with soft hair;
• Next, the fan is removed and its blades are cleaned;
• The wall of the AGV combustion chamber is removed;
• The heat exchanger should be cleaned of soot, rinsed with citric acid or a special compound;
• After dismantling the coil, it is necessary to clean the bottom of the boiler;
• Then the filter intended for cold water is cleaned, blown and washed with clean water;
• All parts are returned to their places;
• The tightness of the AOGV is checked.

After completing all the necessary procedures, you can open the gas valve and turn on the electricity.

When the boiler has been operating for a long enough time, pollution in the form of soot gradually forms on the burner. Accumulating in large quantities, it can cause equipment malfunctions. Therefore, it must be periodically removed.

For mechanical cleaning with small accumulations of dirt, you will need:

• Brush;
• Yorshik;
• Thin needle.

The gas duct is obligatory wiped. The surface of the nozzles is cleaned with brushes or a brush. A needle is used for holes. In no case should the hole be enlarged, as the combustion process may be disturbed.

If there is a lot of carbon deposits, acidic solvents can be used.

Do-it-yourself cleaning of the Aton gas boiler (video)

Any gas boiler, even if it is produced by such well-known companies as Aton or Vaillant, requires respect and care. Timely prevention, washing and cleaning from various types of contaminants is the key to uninterrupted and long-term operation of this type of equipment. However, when working independently, it is important not to forget about the correct assembly and safety rules.

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Thanks to the information presented here, you will be able to independently, without the involvement of specialists, carry out preventive maintenance of a gas boiler, single or double-circuit. The work performed by you in accordance with the recommendations below will be of no less quality than the preventive maintenance carried out by qualified personnel of service companies.

In addition, you can save a considerable amount, since the cost of specialist services can reach several hundred US dollars. In addition, waiting for the arrival of the master for several days, or even weeks, may not suit every owner of an individual heating system, especially shortly before the start of the heating season.

A little theory or how it all starts

After reviewing the theoretical information, you will be able to understand that the principle of operation of a gas heating system is the elementary process of converting the energy of the burning gas into the energy of water or some other coolant circulating in the heating system. All these changes take place in the gas boiler heat exchanger (read also: "").

Although the heat exchangers of different heating systems may have some distinctive features, their design and principle of operation are basically the same: a coolant passes through a curved pipe (coil), then the coil heats up with a flame of burning gas, transferring heat to the liquid passing through it, supplied further along pipes to heating radiators. The plate system, in which the tube heated by the flame is located, allows to increase the temperature and make the heating of the coil material more uniform. Outwardly, such a system resembles a radiator installed in a car.

For the manufacture of heat exchangers, materials with good thermal conductivity are most often used. As a rule, these are copper alloys or pure copper.

In order to ensure efficient heating of the coolant in the heating system, it is necessary to monitor:

• Cleanliness of the heat exchanger inside and out
• Cleanliness and absence of blockages in gas nozzles that release gas to heat the heat exchanger and its surrounding plates

You are unlikely to find specific figures, however, the experience and independent calculations of the owners of individual heating systems indicate that as a result of contamination of the heating system of the coolant, the loss of resources can be quite large.

In this case, the excess consumption of gas can be 10-15%. When converted into a financial equivalent, the amount lost as a result of the inefficient operation of the heating system can be quite large. In accordance with the advice of professionals, for the efficient operation of the heating system, annual cleaning of the heat exchanger of a double-circuit boiler is necessary, however, practice shows that with soft tap water it is enough to carry out this procedure once every three years.

Scale in kettles and taps indicates a high degree of water hardness, in which case we recommend cleaning the heating system every two years.

Do-it-yourself boiler heat exchanger cleaning - getting started

Before starting work, firstly, you should disconnect the heating boiler itself from the power source.

In order to access the system heat exchanger, you will need the following tools:

• Phillips screwdriver
• Flat screwdriver
• Wrench.

Perhaps, in your case, you will not need the entire set of tools from the list above, however, we recommend that you still provide for the presence of each of them “in reserve”.

For example, to access the heat exchanger of a double-circuit turbocharged boiler with a Hermann SuperMaster 24SE boiler, you will need to do the following:

At the bottom of a turbocharged boiler, you will most likely find a bunch of air-drawn debris. It will be most convenient to remove it with the help of an ordinary household vacuum cleaner.

The lower part of the combustion chamber is occupied by a number of nozzles that pass gas into the system. All nozzles should be thoroughly cleaned - the holes through which gas is supplied should become transparent.

Next, you need to remove the heat exchanger itself. In the model under consideration, there are no threaded connections; the tube through which water is supplied and removed is connected using an adapter. On one side of the heat exchanger is a temperature sensor, from which the wires should be carefully disconnected.

Cleaning plate heat exchangers

The heat exchanger disconnected from the system should be cleaned from the outside and inside of the formed dirt, rust and scale. It will be most convenient to start cleaning the outer part of it.

First, fill the heat exchanger with warm water, adding some household cleaner to remove rust, scale and other contaminants. After a while, wash everything off the metal with clean water. It will be easier to carry out this procedure on the street using a high-pressure car wash. If you don’t have it at home, then you can ask any car wash to clean the part, but you should make sure that the thin plates are not crushed by a powerful jet of water (read also: "").

Having cleaned the outer surface, you can begin to put in order the inside of the heat exchanger, that is, the inner walls of the curved pipe. There may be a fairly thick layer of scale in it, especially if the previous prevention was carried out a long time ago or was not carried out at all, or if the water in your house is quite hard. There may also be dirt coming from the tap water inside, especially if you do not have a filter installed to purify it.

How to clean the boiler heat exchanger

As described above, to clean the outside of the heat exchanger, it is enough to add any household chemical agent for washing and cleaning various surfaces to clean water. To clean the inner surface of the walls of the heat exchanger, more potent preparations may be needed.

See the video for an example of cleaning the heat exchanger of a double-circuit boiler:

First, you can apply a detergent for cleaning plumbing that removes plaque. Then you should rinse the tube several times with a descaling agent intended for coffee machines, irons and other similar equipment. You can do with citric acid diluted in water. Next, with a powerful jet of water supplied to both holes, rinse the heat exchanger, removing the remnants of cleaning agents from it.

The free passage of water will be evidence that the tube inside is clean. Having finished the “bath” procedures, assemble everything in the reverse order, not forgetting to remove all accumulated dirt from the inside of the boiler. Turning it on at full power, you should make sure that there are no smudges and that the boiler is working properly.

It will take you only about two hours to complete all the work.

Heating water gas boiler, like any other mechanism, requires care and maintenance. One of the main procedures that serve to ensure long-term and uninterrupted operation of the device is its cleaning before and after the heating season. This includes:

• flushing the heat exchanger;
• cleaning ;
• soot removal.

If you have no idea about the internal structure of the boiler, then call a specialist

It is possible to wash the heat exchanger at home, but you need to know and follow some rules. The duration of cleaning depends on the thickness of the layer of organic and mineral deposits and lasts 1.5 - 4 hours. When choosing a cleaning method, one should be guided by the degree of contamination, the availability of special equipment and reagents.

Heat Exchanger Flushing Methods

The heat exchanger for a gas boiler is one of the main parts of the unit. The quality and temperature of the coolant, the efficiency of the device depends on it. When using hard water, salt deposits and occur on the walls of the element. From here, the equipment overheats, fuel consumption increases, and the load on the circulation pump increases.

The heat exchanger is flushed in three ways.

Manual

For free access to all parts, it is necessary to dismantle the element, then carefully remove the scale with a scraper, vacuum cleaner or a metal brush. Here it is important to be careful and careful not to damage the parts and sealing materials of the boiler system, which will lead to depressurization and breakdown of the unit.

Do-it-yourself cleaning of the heat exchanger is carried out by soaking parts in solutions that soften deposits (for example, a 30% citric acid solution). Then, with improvised means, all mechanical impurities are removed from the channels.

Chemical

In this case, water is completely drained from the heating system so that the concentration of the reagents used does not decrease. Then a do-it-yourself booster is connected to the boiler for flushing the heat exchanger, a special apparatus equipped with a pump to ensure constant circulation of the solution.

Dry powder mixtures containing sulfamic acid are used to clean the element. Reagents are able to destroy carbonate, calcium and iron oxide deposits, they effectively fight scale, limescale, rust. Powders are diluted with water at a temperature of 10–60°C, the solution is run through a heat exchanger for several hours. The composition of the reagents does not destroy the metal and material of the sealing elements.

Chemical flushing of heat exchangers allows you to clean such hard-to-reach places of devices that cannot be reached without disassembling the unit, or that cannot be manually cleaned. It is possible to flush the device with a solution of hydrochloric acid, but this must be done with caution, it is quite aggressive, and toxic waste is difficult to dispose of.

A good effect is given by flushing the heat exchanger of a gas boiler with citric acid, it acts more sparingly than hydrochloric acid. After washing, a neutralizing solution is poured into the system.

To completely remove the sediment products, the fluid for washing the heat exchangers of gas boilers must circulate in the system all the time, stopping and stagnation will lead to clogging of the pipes with fallen and compressed scale particles.

hydrodynamic

With this method, water is poured into the line and, under pressure up to 15 atm, is run through the system several times. Sometimes, for efficiency, a fine abrasive material is added to the liquid, which, passing through the heat exchanger, like sandpaper, cleans the inner surface of the element and pipeline from scale and various deposits.

Flushing the heat exchanger and descaling the hydrodynamic method requires constant monitoring of the pressure. With a critical increase, a heat exchanger rupture is possible.

It is advisable to clean the gas boiler every 3-4 months

Cleaning the boiler from soot

Part of the unburned fuel in the form of soot or soot is deposited on the walls of the boiler and heat exchanger. This leads to a decrease in heat transfer, an increase in fuel consumption, and a decrease in the water temperature in the boiler. There are two ways to clean the secondary heat exchanger from carbon deposits:

Mechanical

Soda and a rough sponge will easily wash off a thin coating of soot; instead of soda, you can use any other powdered cleaner with an abrasive. A thick layer of soot is removed by heating the water in the boiler to a boil, after which the softened layer is brushed off with a stiff brush.

Chemical

In this case, agents are used that include aggressive substances in their composition, which are applied to the contaminated surface using a spray gun or sprayer. After a short exposure, the soot is removed from the surface with a scraper or brush.

Disassembly and removal of soot

For efficient operation of the equipment, it is necessary to clean the gas column. The deposits formed on the walls can disrupt the smooth operation of the device, so you do not have to wait for a complete failure of the equipment, you should periodically carry out preventive cleaning.

Before starting dismantling, it is necessary to cut off access to gas and water. Gas cleaning begins with removing the boiler doors and disconnecting the auto ignition wire. Then the thermocouple, piezoelectric element and burner tube are removed. Carefully get the nozzle and the burner itself.

The thermometer sleeve, the boiler cover, and the flue are removed. The gas column is cleaned using a brush and brushes, which clean all internal and external elements. The nozzle hole is cleaned with a needle with a smaller diameter in order to avoid an increase in the hole and a violation of the combustion regime. The internal channels of the heat exchanger are blown with a vacuum cleaner and wiped with a damp cloth.

At the same time, you can carry out minor repairs to the heat exchanger with your own hands: replace the gasket under the pilot burner, check the thermocouple, which is prone to breakage due to the specifics of operation, and so on. Such work does not require large investments, but maintains the performance of the boiler at a high level, and is quite simple, and replacing the element will not be difficult.

The structure of the gas boiler

Assembly is carried out in reverse order. When connecting the piezoelectric element, it is recommended not to use a tool in order to avoid damage to the ceramic base, it is better to tighten it by hand.

When installing, it is necessary to check the thermocouple on the gas boiler, you need to know that the end of the conductors must be at the level of the place where the flame appears.

The nuances of cleaning a gas boiler

When starting to cleanse, you need to know that:

1. Flushing of boilers should be carried out when they are completely disconnected from electricity, gas and water.
2. When dismantling the heat exchanger, you should try not to damage the sealing elements, sealing failure will lead to leaks and damage to the unit.
3. Care must be taken when cleaning the heat exchanger, as the thin tubes on the inner surface may be damaged.
4. A control check for the tightness of the joints can be carried out by coating the joints with soapy water.
5. When washing in aggressive solutions, it is recommended to add substances that reduce the acid effect on the metal and form a protective film on the surface of the element.

It is best to wash the heat exchanger of a gas boiler with special reagents that will be gentle on the material of the unit and will qualitatively remove all contaminants.

Master Boiler Power removes iron-oxide and carbonate-calcium deposits, does not affect gaskets and seals, the process is accompanied by active foaming, operates at a temperature of 20-40°C. Cleaning is considered completed when the release of foam stops.

Zinconex Powder - removes almost all deposits, contains a color indicator that allows you to control the degree of washing. Compatible with aluminum, galvanized, copper, steel and cast iron surfaces.

Fauch 200, Fauch 610 - spray (aerosol) designed for the walls of boilers and heat exchangers.

Effective soot remover HANSA - is a mixture of crystals that burn in the firebox during ignition. It is designed to clean the elements of the boiler of soot and resinous deposits, reacts with them, destroying the structure of deposits.

a gas boiler

heat exchanger cleaning

do-it-yourself booster for flushing heat exchangers

clean the gas stove

heat exchanger for gas boiler

flush the heat exchanger of the gas boiler (with what)

chemical washing of heat exchangers

flushing the gas boiler heat exchanger with citric acid

gas column cleaning

boiler flushing

descaling

check thermocouple

do-it-yourself gas boiler heat exchanger repair

sulfamic acid

do-it-yourself cleaning of the heat exchanger of a double-circuit boiler

secondary heat exchanger

gas column cleaning

thermocouple device

check thermocouple on gas boiler

do-it-yourself gas column cleaning

fluid for flushing heat exchangers of gas boilers

do-it-yourself flushing of the gas boiler heat exchanger

cleaning the heat exchanger

flush the heat exchanger at home

A gas heating boiler, like any other technological device, operates in rather difficult conditions. For this reason, it requires regular maintenance. And one of the most important procedures carried out during maintenance is flushing the gas boiler heat exchanger.

Basic flushing methods

You should start with the fact that the heat exchanger, first of all, is a pipe system with a liquid moving inside. But the water that is used in the systems is usually not of high quality. Various metal salts present in it settle on the walls of the structure, become scale and narrow the passage. There are three ways to deal with scale:

• mechanical;
• chemical;
• by pumping fluid into the system under strong pressure.

The article deals only with do-it-yourself cleaning, and therefore we will not talk about the third method. You definitely cannot cope with it alone, since you will need a special compressor capable of creating a pressure of about 10 atmospheres. Only with the help of this device can deposits on iron surfaces be broken.

Note! With the other two methods, it is quite possible to deal with it yourself. Let's make a reservation right away that this is quite difficult, and appropriate skills will be required.

Video - Cleaning heat exchangers

Method number 1. Mechanical flush

If this flushing of the gas boiler heat exchanger is used, do not forget that the exchanger itself takes up a lot of space in the heat generator. It is located above the combustion chamber, so it is not easy to get there. The algorithm of actions should be as follows.

Step one. The upper body is removed. To do this, it is necessary to turn off the electrical power and gas supply (if all this is provided for by the boiler design).

Step two. The exchanger is disconnected from the heating main.

Step three. The fixtures are removed.

After that, you can remove the heat exchanger from the heat generator and proceed directly to the flushing procedure. And what can be seen after dismantling? As a rule, all internal cavities are clogged with scale - salts of metals, calcium or sodium, as well as trivalent ferum.

For cleaning, you will have to use metal tools - pins, scrapers, and so on. In the course of work, special care should be taken so as not to damage the surface of the structure.

In some cases, the device is wetted in a container filled with a weak solution of hydrochloric acid. And as soon as the scale softens, you can begin to remove it. At the end of the procedure, all internal voids are washed with water under slight pressure. For this purpose, you can attach a hose connected to the water supply system.

You can see for yourself how much dirt will pour out. You need to wait until clean water starts to flow. Additionally, you can tap the surface of the device with a mallet (this is a special hammer made of wood or rubber).

Method number 2. Chemical flush

Immediately make a reservation that such washing is a rather complicated procedure. In the course of work, you will need a special device called a booster. And, despite the fact that this option is extremely simplified, in order to implement it, you should still be aware of a number of important nuances.

What is the simplification of the methodology? First of all, there is no need to remove the heat exchanger and dismantle some elements of the gas boiler. It is only necessary to disconnect a pair of pipes (a special hose must be connected to one of them, through which a cleaning agent will be supplied inside the case). After passing through the body, the product will come out through the second pipe, to which a hose will also be connected. Therefore, both in the exchanger and in the booster, the product will move in a circle.

Now let's look at what components the booster itself consists of. These include:

• chemical container;
• an electric heater (not all models have it, but people with experience advise purchasing just such models; this way the reagent will heat up, and being warm, it removes salt and dirt deposits more quickly and efficiently);
• pump.

Note! Such chemical reagents can be various kinds of solutions that are freely available on the domestic market. And the question of choosing the right reagent is the most relevant. In each case, it is necessary to take into account not only the degree of clogging, but also its type, as well as the material used in the manufacture of the heat exchanger.

What is the best way to clean the device?

Now let's figure out what is best to use for flushing. Despite the fact that there are quite a lot of recommendations and instructions, the choice of a particular fluid should be taken with all caution. Most experts advise using saline for this purpose. Such a solution really effectively removes growths, but by its nature it is quite aggressive. Therefore, there may be a risk of destruction of the internal surfaces of the structure.

Note! In addition, there is information that the use of hydrochloric acid can lead to metal brittleness.

But citric acid, as it turns out, is not so dangerous for heating equipment. It copes well with various types of scale - no less effectively than the reagents that are popular today, including Sanaks, Sillit, Detex and others. And if you take care of all elements of the heating system in a timely manner and, more importantly, competently, you can not only increase its performance, but also significantly extend its service life. Cleaning the heat exchanger - one of the most important operations, as we have already found out - will be a significant contribution to this process.

Features of flushing plate heat exchangers

In this case, the exchanger still needs to be disconnected from the boiler and the external and internal surfaces must be cleaned of scale. It's easiest to start cleaning from the outside. First, the device is filled with warm water, to which some kind of household remedy is added against scale, rust, and so on. After some time, the agent is washed off the surface with clean water. It is most convenient to carry out this operation on the street, using a car wash for washing, supplying a pressure of water under high pressure. In the absence of such a wash, you can ask the car wash workers to carry out this operation, but do not forget that too much pressure can damage the plates.

After cleaning the outer surface, you can wash the inner walls of the structure (these are the walls of the curved pipe). This flushing of the gas boiler heat exchanger is different in that a fairly thick layer of scale can be on the surfaces, especially if the last cleaning was carried out a long time ago, or was not carried out at all, or if hard water is used in the system. Even dirt can get inside, getting there along with the working fluid, especially in the absence of a cleaning filter.

Video - Cleaning procedure for plate exchangers

Why is it necessary to flush the heat exchanger?

In fact, a heat exchanger is a metal (or made of cast iron) box in which a radiator is installed. This radiator is heated by the fire of a burner located outside and gives off heat to the working fluid circulating inside.

In the case of a clean heat exchanger, it will function with maximum efficiency, and almost all the energy received will be spent on heating. But over time, the walls of the internal channels are covered with various kinds of impurities - salts (scale) dissolved in the liquid. Tellingly, scale is especially actively formed precisely in the secondary exchanger of the boiler for 2 circuits, if hard water circulates in the network.

The consequences of this kind of pollution can be the most unpleasant.

1. The heat exchanger is overheating. In accordance with the scheme of operation of gas equipment, the coolant, which is supplied from the "return" pipeline, must cool the internal surfaces of the heating element. And if scale forms, then the heat exchanger overheats and the device, as a result, fails.
2. The efficiency of the heater is reduced. Mineral deposits, as you know, have a rather low heat conductivity, which is why more energy is spent on heating the liquid. Consequently, fuel consumption increases.
3. Heating equipment fails. Due to mineral deposits on surfaces, the movement of the working fluid is difficult. This forms an excessive load on the circulation pump, which, as a result, quickly exhausts the working resource (in the absence of timely cleaning of narrow passages).

As you can see, if you flush the heat exchanger in a timely manner, you can not only save a lot of money, but also prevent the failure of expensive elements. In addition, a minimum of gas consumption is ensured.

How often should the heat exchanger be cleaned?

When visiting thematic sites, there is very conflicting information regarding how often the heat exchanger should be cleaned, and all other elements of the heater. As a rule, information about the intervals between maintenance is indicated in the manufacturer's instructions for a particular model. But at the same time, it should be remembered that the indicated information is approximate and implies the fact that the operation will be carried out in the most favorable conditions. In fact, flushing the gas boiler heat exchanger is often required more often.

There are indirect signs by which it is possible to determine the degree of clogging of the heat exchanger. It is they who accompany the operation of the heating device.

1. Fuel consumption has increased markedly. According to statistics, in the case of internal scale on the surfaces of the heater, fuel consumption can increase even up to 15 percent.
2. The load on the circulation pump increases, it makes extraneous noise, there are interruptions in operation. All this suggests that flushing is required.
3. The performance of the heating system has dropped. The heating batteries take longer to warm up, the temperature of the working fluid in the return pipe is low, the burner is on all the time. All these signs also clearly indicate that it is time to start flushing.
4. Weak pressure in the tap and “barely alive” liquid in the hot water supply system also indicate that there are definitely problems in the heat exchanger.

Note! Modern gas boilers are manufactured with the expectation of long-term operation, and spare parts for them are quite expensive. For this reason, cleaning should be started immediately upon detection of the symptoms described above, otherwise the cost of maintaining the device will increase significantly.

Proper operation of the heat exchanger: what to do to make the device last as long as possible?

1. First of all, the feed valve must be located correctly. During repairs, fluid may drain from the system. Often recharge is carried out by means of a special tap. If this happened once, then it’s okay, but if this tap is located at the entrance to the heater and is provided with cold water, then as a result, the cast iron may experience the so-called “thermal shock” and simply crack. This is due to the fact that cold liquid is supplied to the heated heat generator and the temperature jumps on a local scale, and cast iron, as you know, does not like this.
2. Do not pour antifreeze into the system; in extreme cases, use only a branded product. It costs, by the way, somewhere around 600 rubles per liter. And if the area of ​​\u200b\u200bthe house is, for example, 250 square meters, then about 200 liters of antifreeze will be needed. Of course, if desired, it can be diluted with water, but subject to strict adherence to proportions. For example, to obtain a liquid that will freeze at minus 25 degrees, the proportions are 1:1. Simply put, for the mentioned area you will need about 100 liters (read: 6 thousand rubles). Expensive - of course, but with such a coolant you will be able to protect yourself from possible problems for several years.
3. Fill the system with softened water. As we have already found out, water hardness plays a key role in this matter. If the coolant is hard, then it will contain metal salts that can accumulate on the walls of superheated heat exchangers. This is almost the same as the scale that forms in a kettle.

Summing up a little

So, we found out that flushing the gas boiler heat exchanger (regardless of the method chosen) takes several hours and requires certain skills and knowledge. This can be done with your own hands, or you can entrust it to specialized firms. And you can check how well the cleaning was carried out, both by indirect signs (increased productivity, absence of extraneous noise and overheating), and by means of a video probe inserted into the boiler body after washing. This will allow you to visually verify the quality of the result. The mentioned firms, by the way, provide such a service.

Many operate heating devices without properly caring for them. Do you do breakage prevention? This must be done regularly, then the equipment will not break down, and there will be comfort in your home. How to clean a gas boiler? You can call the master who will do all the work. Or you can do the cleaning yourself. Forget about spending on service - we will tell you how to remove soot and scale.

Why do you need gas boiler cleaning?

Most often, the heating units, the exhaust system of combustion products are clogged. Scale may form on parts that come into contact with water. Gas exhaust pipes accumulate soot and soot.

Heating occurs due to the heat exchanger. Two radiators are installed in double-circuit boilers "", "", "". One is a curved tube through which water circulates for the heating system. The second consists of plates, serves to provide hot water (DHW).

The harder the water in a region, the faster scale will form. During heating above 60 degrees, there is an active deposition of salts on the walls of heat exchangers.

How do you know when it's time to clean your appliance?

• The coolant heats up slowly;
• Low heat transfer with high fuel consumption;
• Noise and hum during equipment operation;
• Reduced pressure when opening the mixer.

Scale narrows the passages in the pipes, so the pressure drops. Because of this, there is an additional load on the circulation pump. The radiator does not give off heat well, because of which it can overheat and fail.

The chimney, hearth, smoke exhaust pipes are subject to soot accumulation. During combustion, fuel impurities - carbon, organic matter - settle on the walls. What does this lead to:

• Traction disappears, due to which carbon monoxide can enter the room;
• The level of fire safety is reduced. Large accumulation of soot can catch fire;
• The flame in the burner becomes unstable or disappears;
• Efficiency decreases due to plaque on the walls;
• The gas consumption is increasing.

How often and which nodes need to be cleaned

The equipment needs external and internal cleaning. How often should the heat exchanger be descaled? Experts recommend doing this once a year. What other components of the floor and wall boiler need to be cleaned:

• burner;
• igniter;
• filters;
• nozzles;
• coaxial chimney, conventional mine;
• pipes;
• furnace.

Consider how to properly clean the nodes in the boilers "", "", "" and others with your own hands.

heat exchanger

The operation of all double-circuit boilers is regulated by a three-way valve. It switches the heating from one radiator to another, so you need to monitor its functionality.

The principle of its cleaning, the choice of a suitable agent depends on the structure of the heat exchanger. There are radiators:

• Bithermal. The design consists of two tubes, heating is carried out simultaneously for hot water and heating. Such products are difficult to clean;
• Lamellar. Consist of layers of plates;
• Fire tube. Fluid circulates through the coil tube. More common in outdoor units "", "", "".

What is flushing?

• Chemical;
• Mechanical;
• Hydrodynamic;
• Electric discharge.

For work you will need:

• wrench;
• brush-brush;
• brush for metal, pile;
• screwdriver.

First you need to get to the node.

• Close the gas valve;
• Remove the cover. It may be necessary to unscrew the bolts for this;
• Disconnect the sensors connected to the heat exchanger.

For high-quality cleaning, the assembly must be dismantled. Using a brush and a brush, clean the surface and internal parts from soot, dust, soot. If descaling of internal parts is required, chemical agents can be used.

The reagent is pumped into the booster. The pump hoses are connected to the radiator, flushing starts. Upon completion, all parts are washed with clean water. Users recommend using ordinary household products - they are much cheaper than specialized ones. The main thing is that they are thick.

You can use home remedies. Prepare a solution of citric acid in a ratio of 200 grams per 5 liters and pour into the heat exchanger. Lower the knot into a metal basin with water, put it on the stove for heating for half an hour. Then rinse under the shower.

Do not expose the plates and parts to strong mechanical stress, otherwise they will deteriorate or deform.

Hydrodynamic cleaning consists in pumping pressure with a pump. Thus, a high-pressure flow is driven through the system, removing contaminants and plaque.

For the electric discharge procedure, special equipment "Streamer" is required, so it is carried out in a service center or workshop. At home, pollution can only be eliminated mechanically or chemically.

Igniter

How to understand that it's time to clean the system? Watch the flames. If everything is in order, it is an even blue color. If the flame is yellow and burns unevenly, then the burner and igniter are clogged with dust and soot.

To remove contaminants, do this:

• Shut off the fuel supply;
• Dismantle the igniter;
• Clean the element with a brush;
• Install the item in place.

Burner

You can determine the degree of contamination by the signs indicated above.

• After shutting off the gas, remove the burner, nozzles;
• Clean the nozzles with a small brush;
• The burner is cleaned with a brush, the inside is blown with a pump;
• Assemble the parts and reinstall.

Filters

Water filters-mesh are removed, washed with running water. Rust deposits are removed with citric acid - just soak the part in the solution. Don't forget to clean the gas filters.

Firebox, chimney

The accumulation of soot narrows the passage of the mine, which leads to a deterioration in traction. In this case, the boiler must not be operated - it is life-threatening. You can remove the soot from your side, and for cleaning from the street, contact the utilities. Make sure that the top of the chimney is not covered with ice. To avoid this, it is better to insulate the pipe.

The furnace is cleaned with brushes. Watch the amount of soot carefully. Under adverse conditions, it may ignite.

Boiling water is used to remove accumulations on the walls of the boiler. Fill the unit with it, turn it on. Let the liquid boil. After that, the soot can be easily removed with a sponge. You can use chemicals, but before that, carefully study the instructions.

Sometimes automation, a relief valve and other parts need cleaning. Preventive maintenance should be carried out at least once a year. So you will avoid many problems and prevent serious damage.