Washing the boiler heat exchanger with citric acid. Regular cleaning of the boiler heat exchangers is a guarantee of its efficient operation.
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 work 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;
- Possible option hydrodynamic washing using increased pressure.
Manual cleaning is done with a stiff brush and a vacuum cleaner. For a double-circuit boiler, 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 working 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, remove 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 from scale citric acid or a special composition;
- After dismantling the coil, it is necessary to clean the bottom of the boiler;
- Then the filter is cleaned cold water, purged and washed with clean water;
- All parts are returned to their places;
- The tightness of the AOGV is checked.
After spending everything 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 cleansing of different types pollution, is the key to uninterrupted and long-term operation of this type of equipment. However, when independent work it is important not to forget about correct assembly and safety rules.
Modern water contains a large amount of harmful chemically active substances, which contributes to the rapid deposition of scale on various heating elements. Scale is the first enemy of such important units as, for example, a gas boiler. First of all, the heat exchanger inside the boiler will suffer. Consequence: costly repairs or the need to purchase a new element.
It is possible to prevent such consequences. It is enough to clean the heat exchanger in a timely manner, and to carry out this procedure quite possible on your own.
What is a heat exchanger?
The heat exchanger is an important component of a gas boiler. Its main function is to transfer heat from a heated element to a secondary one.
There are several types of heat exchangers:
- Combined or bithermic heat exchangers. In many modern double-circuit boilers heating, bithermic heat exchangers are installed, which combine two heat exchangers in one design: for heating and for hot water supply (DHW).
A bithermic heat exchanger is also called a dual heat exchanger. The section shows that structurally it represents a "pipe in a pipe".
Hot water flows through the inner pipe, and through the outer pipe
heating system coolant
Single-circuit or double-circuit boiler - is there a difference?
Varieties of boilers do not affect the time period through which it is necessary to flush the heat exchanger. It is much more important which liquid () circulates in the heating system and which one enters for hot water supply.
When using process water that has undergone standard treatment, the boiler can be flushed no more than once every four years. This removes a layer of scale (which still forms) and deposits that have a more complex structure. If you do not filter the water before pouring it into the system, but use ordinary water from a centralized water supply, then flushing should occur more often, at least once every two years. This is due to the high content of chlorine in the liquid, which, upon contact with the heating element, settles in the form of scale.
Some users prefer to use antifreeze as a coolant. This liquid is of higher quality: it does not freeze even at low temperatures, it releases heat more slowly, but heats up quickly. Unfortunately, antifreeze is poisonous, and breaking up into components, leads to damage metal structures. The heat exchanger through which antifreeze circulates should be cleaned at least once every 1.5-2 years.
Therefore, both a single-circuit and a double-circuit boiler require timely cleaning of the heat exchanger, the breaks between which are the same in all systems.
In order to clean the bithermic heat exchanger less often, it is necessary to take care not only of the quality of the heat carrier in the heating circuit, but also of the quality of the water in the DHW system. Water should be cleaned and filtered first. It should also be taken into account that the process of scale deposition starts at a temperature of 70°C, its rate increases by a factor of 2 for every 10°C increase in temperature. In this case, the progression of the process occurs, since the growing layer of calcium impairs heat transfer and the temperature of the heat exchange wall increases.
Basic cleaning methods
The heat exchanger can be cleaned in several ways:
- Mechanical. The heat exchanger is a system of pipes of small diameter, which is quite possible to clean with a small brush and cable.
- Using chemicals. Such reagents should be selected very carefully, too strong preparations can lead to damage to internal surfaces and leaks.
- By supplying water under high pressure. Before this procedure, the liquid is best heated to 70-80 ° C.
If you clean the heat exchanger yourself, then the third option may require serious costs, since you will need an installation that can provide high water pressure. When cleaning with your own hands, you should use a mechanical or chemical method.
The sequence of dismantling the boiler and removing the heat exchanger
It should be remembered that this procedure should not be performed at the height of the heating season. Because there are certain time frames for which it is necessary to remove the heat exchanger, rinse it and install it in place. During this time in heating system there will be no constant temperature maintenance, and when severe frosts this is fraught with serious consequences or a sharp cooling of the house, which will lead to additional expenses for heating it.
The sequence of cleaning the gas boiler:
- Dismantle the burner. Immediately it is necessary not only to remove the part, but also to clean it. For high-quality cleaning of the burner, it is most convenient to use a toothbrush. This personal hygiene item will allow you to get to hard-to-reach places.
- Next, the supply wires are disconnected from the gas valve and the thermocouple is removed from the combustion chamber. To remove the thermocouple, you must first remove the capillary tube connecting it to the gas valve.
- Disconnect the pipes through which gas is supplied to the device. Now it remains only to unscrew 4 bolts (nuts are used in some models). After undocking, the entire assembly can be pulled out and cleaned.
The main element is the heat exchanger. To get to it, you need to remove the protective cover of the device and undock 2 sensors: draft and chimney. Next to the sensors, you need to remove the heater. With long-term operation of the boiler, it is best to replace the insulation with a new one. Its poor quality condition is the cause of energy loss during operation.
After the above operations, the casing is dismantled, and the heat exchanger remains open. To remove it, only turbulizers interfere. This is a device that slows down the movement of exhaust gases. The temperature of the gases can be too high and at the right speed, such exhaust can damage the internal surfaces of the heat exchanger.
Disassembly and flushing of the BAXI Mainfour 24 wall-mounted boiler.
Cleaning the heat exchanger mechanically
After removing the heat exchanger, you can start cleaning it mechanically. Of course, you can choose the second option (using chemically active substances), but it will be described below.
After going through the removal process in stages, and taking the heat exchanger out, an unattractive picture opens up to users: a large amount of deposits and soot both inside the pipes and between the cooling plates. mechanical method cleaning involves the use of a metal cable with a brush at the end, as well as various scrapers and spatulas. With this tool, harmful deposits are removed from both internal and external surfaces.
To make the process of removing dirt faster, you can “soak” the device in water, with the addition of detergents. Then plaque or scale will be removed much easier and without effort. When using a cable, it must be slowly pushed into the device, while turning it clockwise.
After inner part is cleaned, it is necessary to flush the heat exchanger with a hose that can be connected to a centralized water supply. It does not require a lot of pressure, even an ordinary stream of water is enough to wash away dirt, plaque and other deposits.
Remove dirt from the outer surface, especially between the blades, carefully, as this may damage the heat exchanger and disrupt its operation.
What is a booster and how to mount it yourself
When cleaning with chemically active substances, it does not require a lot of effort, but you should purchase or make your own solution that will remove harmful deposits. Using chemical substances booster.
A booster is a device that creates a certain pressure in the heat exchanger and allows the cleaning fluid to be pumped through it. Such a device can be purchased at a specialized store for a substantial amount or you can make it yourself.
Booster mounting sequence:
- Purchase 2 metal plates, no more than 2.5 mm thick. Attach them to the heat exchanger and drill holes opposite the terminals of the device.
- Buy 4 water taps of the "American" type. For better tightness, you should also buy washers on them.
- The valves must be installed in the holes on the plates, which are located below and, using 4 bolts, connect the plates to each other.
- Now you need to find a suitable container. It can be a durable plastic canister or the same bottle. The main condition is a perfectly clean surface inside.
- An adapter is mounted at the bottom of the canister, to which the hose will be connected in the future. The adapter must have sufficient tightness.
If desired, and if there is an extra tap, it can be installed on the adapter, but the heat exchanger can be flushed without it.
A variant of a homemade booster with a circulation pump is presented in the video.
Another option is to use a circulation pump.
How to clean a heat exchanger with a booster
This procedure requires skill and compliance with some safety rules:
- All connections of the system must be as tight as possible to avoid contact of chemically active substances with the skin or eyes.
- The solution for washing should be prepared only in protective equipment (gloves and, if required, goggles).
Now you can start cleaning the heat exchanger with a booster. This will require a pump. low power, for example, from washing machine or heating systems, and a device whose manufacturing sequence was indicated above. The pump should be connected to a container, into which then pour at least 6 liters of water. Before this, the water is heated to a temperature of at least 50 degrees.
After preparatory phase, the hoses from the tank are connected to the inlet and outlet of the heat exchanger and the pump is started. It is enough to drive the liquid through the system once, and turn off the pump. Now you need to make a thorough inspection to make sure that the system is highly tight. If no leaks or drops of water are noticed anywhere, then cleaning can be done in full.
A special solution is added to the system and the pump is started for at least 40 minutes. It should be remembered that both the main and secondary heat exchangers require thorough flushing. Then the total time should be at least 1 hour 20 minutes (40 minutes for each circle).
After the cleaning agent has been run through the system for a specified time, the booster can be turned off and a hose from the centralized water tap connected to the heat exchanger outlets. 3-5 minutes are enough, and the device can be installed back on the gas boiler.
The video shows how to flush the primary and secondary heat exchangers of the Ariston boiler with a booster.
Flushing with booster and hydrochloric acid.
Heat exchanger cleaners
It is best to use for this procedure products that are sold in household or other specialized stores. But, to save money, such a composition can be made independently.
The first thing that is used most often is a solution of 10% sulfuric acid. Such a tool can be used, but this should be done very carefully, since sulfuric acid is very active and can quickly burn through the thin walls of the heat exchanger. Result: the need to contact a master who can solder the hole or purchase a new device. Both the first and second options will cost the user a substantial amount.
You can resort to a more gentle and folk way: for 20 g of citric acid dissolve in 1 liter of water. If the result is not immediately noticeable, then the concentration should be slightly increased. Citric acid qualitatively removes scale and dirt, but at the same time negatively affects rust-damaged areas.
The video below shows how to disassemble the Baxi Ecofour 24F boiler and clean the heat exchanger with citric acid.
Therefore, it is best to spend a little more money, but clean the heat exchanger with tools specially designed for this. For example, a preparation for cleaning gas boilers Detex. This composition has never damaged the inner surface of the heat exchanger and has earned a large number of positive feedback from users.
Benefits of using DETEX liquid:
- Removal of a layer of scale, biological deposits, oxides, salts.
- The composition of the liquid does not destroy the surface of the heat exchanger.
- Contains surfactants, antifoaming and corrosion inhibitor additives.
Summing up
Cleaning the heat exchanger is important and mandatory procedure, which must be carried out at certain time intervals. Only then the life of the gas boiler will be long, and its operation will be reliable. Before cleaning, it is necessary to carefully study the information presented above and strictly follow the tips and recommendations.
Having built Vacation home, each person thinks about how to effectively heat their home.
To achieve this goal, heating systems are installed, the main element of which is a heating boiler. A stable temperature in the room largely depends on the uninterrupted operation of the boiler.
In order for the boiler to work stably, it is necessary to carry out regular maintenance of the boiler equipment.
One of the types of maintenance is flushing the boiler from scale. In this article, we will talk in detail about what scale is, as well as how to effectively get rid of its presence in boiler equipment.
Why does scale appear
This type of pollution is main problem in boiler operation. Scale builds up wherever hot water circulates.
In other words, it settles in a hard layer on the inner walls of the boiler equipment.
What provokes the appearance of scale? The reason for the occurrence of this clogging is very commonplace - the use of hard water as a coolant, which is well saturated with magnesium ions, calcium carbonate, iron oxide, and various other impurities.
When these elements interact with the inner walls of the heat exchanger, salts, or bicarbonates, are formed, which are the source of scale. It is also worth noting that important fact that on the walls that are covered with this pollution, scale will appear even faster and faster.
The result of such an increasing action will be a narrowing of the channels for the circulation of the coolant, and this, in turn, leads to a loss of heat transfer and a decrease in pressure.
Important information: 1 mm of scale leads to an increase in fuel consumption by 10%!
Also negative impact This pollution lies in the fact that scale particles move freely through the heating system and, getting into the heating elements, can put them out of working condition.
Therefore, the following recommendation is very important: removing scale in time will protect your heating boiler from breakdowns and failures.
Signs of limescale
In order to understand when it is necessary to flush the heating boiler from scale, it is necessary to know the signs of its appearance in a gas or other type of boiler unit.
These signs are the following important points:
- fuel consumption increases significantly with the same operation of the boiler;
- characteristic crackling and microexplosions are heard in the boiler unit;
- the heat exchanger overheats significantly (weak return of return water does not cool this device);
- heating elements heating unevenly;
- circulation pump works with effort;
- low head warm water in the tap (this sign is about the operation of a double-circuit boiler);
- increase in time for space heating at the same outdoor temperature.
When to clean
For heating a cottage or country house the boiler is in full operation heating season and at the same time - 24 hours a day.
This is a sufficiently long period for the formation of a limiting amount of scale.
Also, unscheduled descaling can be carried out when the above signs are found in the operation of the boiler.
How to clean
Cleaning the boiler from scale is called flushing. There are two main methods for flushing the boiler from scale:
- collapsible;
- in-place.
When using the collapsible method, you can sequentially dismantle parts that are contaminated with scale with your own hands. Then these parts are placed in a container with a reagent for several hours. After that, these nodes are thoroughly washed with water, and then re-installed.
The name of the in-place method speaks for itself, in other words, the descaling of the boiler is carried out on the spot - without dismantling contaminated parts. Cleaning the boiler from scale in this case is carried out using a special device called a booster.
This device consists of the following components:
- container for chemical solution;
- liquid electric heater;
- circulation pump.
Flushing the boiler from scale using a booster is carried out in the following order:
- the boiler is turned off from the fuel supply or, in the case of a solid fuel version, the device is allowed to cool;
- water is drained from the boiler;
- disconnected from the heating system;
- booster is connected;
- this device starts pumping the reagent through the boiler for 5–6 hours;
- the waste liquid is drained;
- the boiler is flushed and connected to the heating system.
It is also worth knowing that effective removal descaling by flushing with a booster, the entire volume of operations must be repeated several times.
the concentration of acid solutions for flushing should be 1% per 1 mm layer of scale!
In this article, we tried to tell you as much as possible in detail about how you can do the descaling of the boiler yourself. We hope that this will be very useful information for you.
Watch a video in which an experienced user explains how to descale a gas boiler yourself:
- scale formed on the heat exchanger, the cleaning and washing of which has to be done periodically. With an increase in the layer, the efficiency of the boiler decreases. To improve performance, you have to increase the power. This increases fuel consumption and accelerates the wear of the unit.
The scale layer prevents the complete cooling of the heat exchanger. At one point, the unit will fail, or the circulation pump will burn out from overload. How is the heat exchanger flushed, what means can be used?
A signal for the user that it is time to clean the boiler - a decrease in heat transfer, an increase in gas consumption (). But it’s better not to bring it up to this: the thicker the layer of pollution, the more difficult it will be to deal with it on your own, and cleaning by professionals will cost a pretty penny.
Under normal conditions, do-it-yourself cleaning of the heat exchanger of a double-circuit boiler is carried out every two years (). If the water is hard - more often. Special attention is given to a secondary heat exchanger through which hard tap water passes.
The second mandatory action is the removal of soot, which is deposited on the outer surface of the heat exchanger housing. There are no hard and fast recommendations about the frequency of cleaning - the amount of soot depends on the quality of the gas used, on the efficiency of the filters in the supply, on design features boiler, etc.
The need for cleaning can be determined visually, or this work can be done at the same time as internal flushing. large clusters scale and soot combined can reduce the thermal efficiency of the boiler by half.
If antifreeze is used instead of water in the heating circuit, the frequency of cleaning depends on its brand: some anti-freeze liquids contain chemical components that counteract the accumulation of plaque.
How to clean the heat exchanger of a double-circuit boiler and how often this should be done is indicated in the instructions for the model. But these recommendations are usually designed for ideal conditions operation (composition of water, etc.), which in real life usually doesn't happen.
Cleaning methods
How to flush the heat exchanger of a double-circuit boiler at home? In some cases, disassembly of the unit is required, while others can be dispensed with. The purpose of dismantling is to provide access to the heating element. When cleaning with disassembly, you can do minimal cost, but this option is long and laborious.
Sometimes partial disassembly is performed - for example, to clean soot from the fire-tube heat exchanger of a floor-standing boiler. The heat exchanger itself cannot be dismantled at home, they free access to it: they also remove the cover with the chimney outlet pipe.
How to remove the heat exchanger from a wall-mounted gas boiler? First, the electrical unit is de-energized, the water supply is shut off, water is drained from both circuits and the expansion tank. After that, the heat exchanger is dismantled.
flushing
How to clean the heat exchanger of a gas boiler from scale with your own hands? With a small amount of plaque inside, you can do with manual washing using a solution of citric acid.
With a thick layer of scale, you will need washing plant which will circulate detergent for a few hours. For this purpose, a 10-liter tank with a pump is suitable (you can use a circulation pump from the circuit). Two hoses from the pump are connected to two pipes of the heat exchanger.
There are three cleaning methods:
- mechanical;
- chemical;
- hydrodynamic.
In the first case, a brush, scraper, vacuum cleaner can be used to remove plaque. Heat exchanger parts are pre-soaked in solutions of cleaning agents.
At chemical treatment an acid wash solution is pumped into the system using a booster and driven through a heat exchanger for several hours. Acidic solutions remove iron and carbonate deposits well. At the end of cleaning, the agent is drained and a neutralizing agent is poured.
The hydrodynamic method is the injection of water with abrasives into the system under pressure. Thus, the internal surfaces are cleaned mechanically, but the cleaning efficiency is higher than when processing manually. Flushing can be performed without dismantling the system, but it is quite expensive. When self-cleaning, you need to monitor the pressure in the circuits to avoid rupture of the heat exchanger.
Chemical compositions
How to flush the heat exchanger of a gas boiler? The safest option is citric acid. Industrial facilities for flushing the heat exchanger of a gas boiler - Cillit, DETEX, Sanaks.
Hydrochloric acid is more effective. But its use is more dangerous for both the user and the system. concentrated acid can destroy the internal protective layer of the heat exchanger, as well as increase the fragility of the metal.
External processing of contaminated parts is carried out by special compositions to remove soot and carbon deposits. In extreme cases, you can use household detergents.
Video about flushing the heat exchanger of a gas boiler.
A heating boiler, like almost any technological equipment operating in difficult conditions needs periodic maintenance. One of the most important operations carried out during the maintenance of a gas boiler is the cleaning of its heat exchanger.
heat exchanger is a metal (or cast iron) box with a built-in radiator, which is heated from the outside by a burner flame and transfers heat to the liquid flowing inside. If the heat exchanger is clean, then it works with maximum efficiency, giving almost all the energy received for heating. However, over time, various impurities begin to precipitate on the walls of the internal channels, which are compounds of salts dissolved in the coolant (scale). The formation of lime deposits is especially intensive in the secondary heat exchanger of a double-circuit boiler, if hard water is used in the DHW line. 
Such contamination of the heat exchanger channels can lead to a number of unpleasant consequences:
- Reduced boiler efficiency. Mineral deposits have a much lower thermal conductivity than metal, so much more energy will have to be spent on heating water. Accordingly, the gas consumption will also increase.
- Heat exchanger overheating. The scheme of operation of gas boilers assumes that the coolant coming from the return line cools the internal cavities of the heating element. When scale appears, the cooling efficiency drops, the heat exchanger overheats and quickly fails.
- Breaking heating equipment . Mineral deposits on the inner walls of the heat exchangers make it difficult for the coolant to pass through them. This creates an additional load on the circulation pump, which will quickly exhaust its resource if the narrowed channels are not cleaned in time.
Thus, timely flushing of the heat exchanger will help save significant funds by preventing the breakdown of expensive components and ensuring the minimum required fuel consumption.
Frequency of cleaning the heat exchanger
IN different sources you can find rather conflicting information about how often cleaning of various elements of heating boilers should be carried out. As a rule, maintenance intervals are given in the instructions for a particular model. However, please note that these figures are approximate and are based on the most favorable operating conditions. In fact, flushing of heat exchangers may be required more frequently.
It is possible to assess how heavily the heat exchanger is clogged by several indirect signs that accompany the operation of a gas boiler:
The design of modern boilers is designed for long-term use, and the cost of spare parts for them is quite high. Therefore, the heat exchanger should be cleaned immediately when the symptoms described above appear. Otherwise, the cost of maintaining heating boilers can increase significantly.
Methods for cleaning heat exchangers
The heat exchanger can be flushed different ways. Next, we will consider them in more detail, and at the same time we will note how to clean the heat exchanger of a double-circuit boiler, which is especially prone to the formation of organic deposits.
Manual cleaning
To solve the problem in this way, the heat exchanger must be completely removed from the boiler in order to gain free access to it. After that, it can be cleaned with various tools:
- mechanical cleaning. You can remove plaque from the inner surface with a hard metal brush or a special scraper;
- flushingV special formulations . Most often, heat exchanger parts are soaked in an acid wash solution. This method is especially effective for removing heavy pollution, for example, in the channels of double-circuit gas boilers.
The manual cleaning method is simple and effective. It can be used to flush the heat exchanger yourself. The only remark is that it is necessary to be careful when working with the sealing elements of the boilers and monitor the tightness of all connections.
Hydrodynamic cleaning
Flushing of heat exchangers of a gas boiler can be carried out without disassembling it.
Hydrodynamic cleaning is a process mechanical removal scale from the walls of pipelines with water jets high pressure, which sometimes contain impurities of small abrasive particles.
Such a procedure is carried out with the help of special installations that pump pressure up to one and a half thousand bar in the line. This is the most effective, although quite expensive, way to clean heat exchangers.
Chemical cleaning
Chemical flushing of the elements of gas boilers consists in the fact that an acid flushing solution is introduced into the system using a special device called a booster. Then this solution is run through the heat exchanger for several hours and cleans it. This method allows you to remove the most complex types deposits - carbonate scale and ferric iron.
Disadvantages of chemical cleaning include high cost reagent, metal wear and a large amount of toxic waste.
Fluids for flushing heat exchangers
In conclusion, consider the question of how to flush the heat exchanger of a gas boiler. Despite the abundance of recommendations in various sources, some care must be taken in choosing a cleaning agent.
Many experts recommend using hydrochloric acid for flushing. It removes scale really well, but is a rather aggressive compound that can disrupt protective covering inner surface of the heat exchanger.
In addition, there is evidence that washing with hydrochloric acid can cause metal brittleness.
Less dangerous for the heat exchanger material is citric acid. It perfectly copes with all types of deposits, as well as special reagents: DETEX, Cillit, Sanaks and others.
timely and proper care behind the elements of the heating system will increase its service life and reduce the cost of maintaining performance. Cleaning the heat exchanger, as one of the most important operations performed during maintenance boilers, will make the most significant contribution to this process.
