Baxi. I think there is a problem in the hot water circuit?

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Published: 22.05.2019

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Gas boilers are designed to create a comfortable living environment. Double-circuit units provide the living space with heat and hot water at the tap. But it happens that a working boiler does not heat water well and does not provide the necessary comfort.

The degree of efficiency of the entire heating system depends on how the boiler works. If there are malfunctions in the gas boiler itself, then this can adversely affect the efficiency of the entire system and cause excessive consumption of energy resources. What happens when the boiler stops heating water? Let's analyze the reasons and ways to solve this problem.

• 1 How does the boiler work?
• 2 The boiler does not heat water for heating
• 3 The boiler does not heat hot water supply

Design features of the gas boiler Baksi baxi, Navien, Ariston

In any case, it will be useful to familiarize yourself with the technique of this class and the features of modern models. This knowledge will help you to choose the right equipment, not to make mistakes during operation.

In household boilers Baksi (baxi), Navien and Ariston, gas, diesel and solid fuel are burned to heat water, electric heating elements are used. For a more complete use of the potential of energy resources, heat exchangers are being improved. Long ducts of complex shape are made in them to ensure long-term presence of the liquid in the working area.

The current trend is compactness. Manufacturers offer gas boilers with square bodies of relatively small thickness. Some models, due to their aesthetic characteristics, deserve to be placed in a conspicuous place.

The next feature is the introduction of automated control systems. They control the combustion process, change operating modes, taking into account the readings of temperature sensors on the street and in individual rooms. In case of overheating, the equipment turns off without user intervention.

It is necessary to consider carefully the situations when the Baksi gas boiler does not heat the water. This happens, for example, when the supply of energy resources is interrupted. An appropriate check is not difficult to do even without special professional training.

Circulation pumps, valves, and other typical components and assemblies rarely fail. Their designs are designed for many years of operation without mandatory maintenance. There are no moving parts at all in electronic circuits. Their breakdowns are due to marriage. Subject to the rules established by the manufacturer, the resource of modern gas heating boilers is more than 10 years.

Power surges can damage the electrical part of the equipment. To exclude such influences, an external stabilizer is installed. Checking the grounding system is useful. This exhausts the set of preventive measures for this group of problems.

It is much more difficult to provide protection against the most common cause of breakdowns in gas boilers - scale.

It is she who will be studied in detail in this article. When heated, calcium and magnesium salts are converted into a solid state. It is these impurities that clog the narrow technological holes in the heat exchangers. They also form a porous structure on the surface of electric heating elements. If the normal heat dissipation is significantly disturbed, their housings are damaged.

To prevent the formation of scale and lime inside the boiler, it is advisable to install non-chemical filters (water converters), magnetic and electromagnetic, which will ensure a long "life" of your boiler and an uninterrupted supply of hot water, as well as protect the heating circuit.

The boiler does not heat water

This video is the solution to your problem!

Look to the end and you do not need to call a specialist.

One cannot survive without boiler houses in the climatic zones of Russia. And this also applies to the warmest regions, Sochi, Anapa and Rostov-on-Don. Winters are still harsh and people cannot survive without heating. Therefore, it is definitely impossible to do without heating systems and hot water. And only boiler houses are able to provide the city with all this. Today we will consider the reasons why the boiler does not heat water - how to solve this problem and what to do for this ……

They are very different. It all depends on the heat source. It can be either steam or water. They can vary by location. If the house itself decided to build its own boiler room, then a specially separate room in the house can be allocated for it. Or, extensions are made to the house for these purposes. One of the main requirements for the construction of boiler rooms is good ventilation.

If the boiler operates with steam, then very high requirements are imposed on the quality of water purification, and then steam. Therefore, it will definitely not work out on such boiler houses without a whole complex of purification plants. This also includes the AquaShield electromagnetic softeners, which are now very much appreciated by the employees of boiler houses.

If the gas boiler suddenly stops heating the water, the reasons may be different, but most often when using water from the central water supply without softening installations, the cause may be deposits of limescale. Moreover, it is hard and poorly removable. The table shows possible indications of the cause of the boiler shutdown due to scale build-up.

Other reasons for stopping the boiler are simpler. Maybe a piece of scale gets stuck in the pipe and block normal operation, and a crack in the gas boiler can also contribute to a shutdown. But in these cases, there will definitely be no scale residues on the walls of the equipment. If the boiler room does not have a water softener for boilers or a treatment plant, then the root cause of course will be the hardness of the water. If the treatment facilities are standing, and the equipment has been checked recently, then, most likely, this is not the problem.

If the video did not help you, then try installing anti-scale filters (polyphosphate or electromagnetic) in front of the boiler. Because hard water and limescale are the root cause of malfunctions and breakdowns in gas boilers!

In any case, if there is no cleaning in the system, then you will have to urgently deal with this cause and solve it. For boiler rooms there are a number of water softening devices that are suitable:

• AquaShield;
• Ultrafiltration and conditioning for steam boilers;
• Ion exchange for economical consumers of gas boilers

The most wasteful of all, the process of purification and softening will be in steam boilers. There you will have to remove not just all organic and inorganic impurities. Even dissolved gases will have to be removed. Degassing is quite troublesome and costly. But the operation of the boiler depends on the quality of the steam. This is where membrane softeners work to make the water completely isolated.

Many consumers choose AquaShield gas boilers for the simple reason that they do not need to be looked after and there is no need to spend money on it. But its greatest advantage for boiler equipment has been and remains the ability to remove old lime deposits even in the most difficult places. Usually, to eliminate such residues, the equipment must be untwisted, the parts must be soaked in aggressive acidic environments and they can be kept there for two hours. But even after the boiler treatment of water, the surfaces have to be cleaned with metal brushes or cleaners. If your gas boiler does not heat the water to the required temperature, then the cause is scale deposits. The electromagnet does all this work without damaging the surface, at the molecular level.

Insufficient boiler power

If the batteries in a private house do not heat well, then one of the reasons may lie in the heating boiler. In your home, with almost 100% probability, it can be argued that the heating circuit is autonomous. This means that there is a boiler. This could be:

• gas boiler ;
• electric boiler;
• solid fuel boiler;
• liquid fuel boiler.

Why are the batteries in a private house poorly heated? The reason may be incorrectly selected boiler power. That is, he does not have enough resources to heat the required amount of liquid. The first call to the fact that the power is selected incorrectly is the constant operation of the heater, without shutdowns.

Although in this case the heat exchangers will heat up at least a little. And if the water in them is completely cold, it means that the boiler has broken down or cannot turn on. Modern units have minimum pressure requirement

in system. If this requirement is not met, then it will not turn on. In addition, there is an automation and security system.

Take a gas boiler, for example. It contains a sensor that controls that all gases go into the chimney. It is possible that the chimney or some smoke outlet is clogged. In any case, the sensor will send a command to the control unit and it will not let the boiler turn on.

Problems with the batteries themselves

Batteries in a private house do not heat, what should I do? If there are no problems with the boiler and it is working correctly, then the reason why the batteries are cold must be looked for in the circuit itself. Possible options:

• airing;
• pollution;
• insufficient pressure;
• incorrect pipe routing;
• incorrect connection of heat exchangers.

If the batteries are cold, then you need to check all of the above factors. We have already written in more detail about what to do if the batteries do not heat up. The specificity of a private house is that all characteristics can be controlled independently.

You need to check the circuit for air locks. There are special taps and air vents for this.

Then make sure that there is no dirt in the pipes and heat exchangers. How to do it? We'll have to drain the cold batteries in a private house. What to do is known, you need to unscrew one end (bottom) in the battery and substitute a larger vessel. If black water pours out, there is nothing to think about - this is pollution. It is necessary to flush the circuit to clean water. Sometimes a thick slurry flows out of the radiators along with the water. This is dirt that has gathered in abundant quantities.

What other reasons could there be why cold batteries in a private house? If the problem is not air or pollution, then circulation is impaired. This could be due to low pressure. In general, in an autonomous circuit, the coolant pressure does not exceed two atmospheres. If you have new batteries, then look at their passport. In modern heat exchangers, the requirements for working pressure are higher than in Soviet models. Pay attention to this.

Disruption of coolant circulation

Separately, we will consider the violation of the circulation of the coolant due to improper routing of pipes and piping of heat exchangers, as a result of which the batteries are cold. In your home, you are free to choose the piping method. This could be:

• two-pipe heating system;
• one-pipe heating system.

It so happened that in the past, many preferred the one-pipe heating system, also known as "Leningradka". It was believed that it is simpler and cheaper, but in fact it is not. In addition, in this scheme, it is very difficult to regulate the temperature of the heat exchangers as they are removed from the boiler room. The farther from the boiler, the more sections there should be. Therefore, it is not uncommon that the last battery in a private house does not heat. The coolant flows through one pipe. In such a scheme, there is no return flow.

It turns out that water enters the heat exchanger, cools down there and is again drawn into the general flow. Accordingly, after each radiator, the overall flow becomes colder. The difference increases with distance from the heating element. As a result, water can come to the extreme heat exchanger almost cold.

In a two-pipe system, piping errors can be made:

• improperly installed shut-off valves;
• incorrect connection of the heat exchanger (there are three types: side, bottom, diagonal);
• the diameter of the bends is incorrectly selected.

For these reasons, circulation is disrupted and a negative result is evident, namely a cold battery.

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The reason that the batteries in a private house do not heat up may be a number of factors. We can only consider the issue in general. There are various reasons and they are not always obvious. Sometimes such a trifle as a faulty faucet or a clogged chimney can become a stumbling block. Despite this, there are no hopeless situations, the main thing is to determine the reason why the battery does not heat up in a private house, the rest is a matter of technology.

Errors and their codes

Error codes that may occur during the operation of Baksi gas boilers can be divided into two groups:

• complete blocking of equipment operation;
• switch to standby mode.

In case of complete blocking of the installation, it will be necessary to restart the boiler in manual mode. The blocking is activated in the event of serious malfunctions in the operation of the boiler, which can pose a serious danger to human health. Failures, in the event of which the boiler is blocked, can be attributed to overheating of the equipment, and besides it, the lack of traction. Blocking occurs even in the absence of gas supply. Self-elimination of the error is carried out in rare cases. If this happens, the device starts up in automatic mode.

Error E01

This mistake is the most common one. When the flame sensor is triggered, this code is displayed. Several reasons can lead to its appearance:

• no gas supply;
• there is no correspondence between phase and zero; this reason is relevant for phase-dependent models;
• no contact with the flame sensor;
• the sensor is dirty or defective;
• the ignition system malfunctions;
• the gas valve is faulty or the electronic board is out of order;
• air access is insufficient for normal combustion;
• the gas pressure in the system is insufficient.

If this code is displayed on the display, then the first thing to do is to check if the sensor is connected correctly. It is also worth checking the gas supply. If everything is normal, then in this case you can press R. It should be held for 3 seconds.

If accidentally triggered, the equipment will continue to operate normally. If the error continues to appear, then in this case you should contact a specialist. Note that this error is due to an electronics problem.If you try to solve the problem on your own, then everything can end in disaster for the gas equipment.

Error E10

Another common mistake is E10. The main reason for its occurrence is sensors that monitor the operation of pumps and monitor the circulation of water. This error can be displayed on the installation display in the following cases:

• the pressure of the coolant has decreased in the system;
• contact between the board and the pressure switch has disappeared;
• the pressure switch is defective;
• the pump operation sensor has become faulty;
• there are malfunctions in the pump;
• clogging of the heat exchanger.

When this error occurs, you do not need to try to fix it on your own. Self-repair is acceptable if pump replacement is required. It will not be difficult to hold this event. You can also clean the filters without assistance. All other work related to the repair of the Baksi boiler should be performed by an experienced specialist.

Errors E96, E97, E98

Urgent repair by a qualified specialist is required if errors E96, E97, E98 are displayed on the gas boiler display. If they occur, it is unacceptable for the owner of the equipment to interfere with the operation of the boiler. The prohibition on intervention with these errors is due to the fact that these three codes appear in the event that the electronic board has become faulty.

Types and causes of malfunctions

If the Baksi boiler stops working normally, then you can carry out repairs on your own, without asking for help from specialists. But troubleshooting is possible only if the breakdown is small and easily removable. If you have never encountered the repair of boilers, then in this case you should not risk it - contact the master immediately.

• the boiler burner does not turn on or goes out;
• it is impossible to light the boiler;
• when the boiler is operating, pops are heard in the combustion chamber;
• overheating of the boiler;
• becomes insufficient max. heating temperature of the coolant;
• when the equipment is operating, there is a lot of noise;
• one of the system sensors fails.

Reasons for the breakdown of Baksi boilers:

• moisture has entered the boiler;
• the quality of the heat carrier used is low;
• the gas pressure has dropped in the gas pipeline or a drop has occurred;
• there was a voltage drop in the power grid;
• the installation of the heating system was carried out with errors.

What to do if the Vailant boiler does not heat hot water

I found this way. At the entrance to the boiler, I have a magnetic transducer, which should remove the hardness of the water, but it does not remove it, in my opinion this is fiction. But for me the good thing is that it is installed right at the entrance to the boiler. The photo at the bottom can be seen.

There is an American nut on it, unscrewing it, which you can easily pour citric acid into the pipes.

But for this you need to turn off the water. I have a collector next to the boiler. He is in the photo below.

Now all the ducts on it are open and with one light movement I shut off the water supply to the boiler.

All the water is shut off, now you can unscrew the American woman on the magnetic filter. And do not forget to think of something, from the flowing water from the boiler, there is not much of it, but it is there. I rolled up a rag.

Then I pour citric acid into the inside of the pipe.

I twist the American woman back and turn on the tap to supply tap water to the boiler.

Now it is important to understand when the acid will enter the heat exchanger. Since my water tap is located a meter from the boiler, I determine whether the acid has reached the heat exchanger to taste

I just open the tap with short jerks and taste how "sour" went, which means the whole system from the magnetic filter to the tap is filled with citric acid.

Next, you need to turn off the tap so that your household does not drain all the acid ahead of time.

I fill up the system at night and until the morning I have it acidified. In the morning, I open the water supply tap to the boiler and drain all the acid.The water will sizzle at the same time, do not frighten.

A question may arise, will the heat exchanger eat acid? I dug on the forum of chemists and came to the conclusion that organic acid (citric acid refers to it) is harmless to copper.

I use this method as needed. If you don't like how the boiler heats the water or the pressure of hot water has become weak, I take and treat the heat exchanger with citric acid.

If you have polypropylene piping to the boiler, and there is no place to fill the acid, then think of something similar to it will not take much time.

The Navien Ase boiler does not heat water well

I will answer instead of Olga How do I do it. Naturally, I shut off everything: gas, water, turn off the electricity. Remove the main heat exchanger. Disconnect the sensors connectors, unscrew the ground wire. Unscrew 4 screws, remove the gas supply pipe (upper and lower screws of different lengths). Unscrew three self-tapping screws with engravers and remove the turbine snail. I remove the plastic pipes for supplying water to the heat exchanger. Pull out the spring clamps and simply pull off the tubes. They are sealed with silicone rings. When reinstalling them, they must be lubricated. Then I unscrew 6 self-tapping screws and remove the heat exchanger with a burner. I recommend for this procedures, use a long screwdriver, about 30-35 cm. On the right side, access to two screws is not very convenient. Here we have a heat exchanger complete with a combustion chamber. We clean the outer surface of the heat exchanger. It is better not to disassemble it unnecessarily, you can damage the seal and then gas breakthrough will occur and burnout is ensured. cutter and simply rest against one of the tubes of the heat exchanger. I press the trigger of the pistol. I wait until the clear water flows. I repeat the procedure several times, alternating the supply and return pipes. until the dirt and lime stop flying out. I drain the rest of the water and pour in the descaling agent. I will not advertise a certain brand, the main thing is that there is liquid. I’m waiting for the reaction to stop, sometimes foam comes out of the tubes. For better filling, you need to shake the heat exchanger. Then I rinse again several times. I drain the water and put everything back. Once again I draw attention to the correct installation of the screws. Where the short ones stood, we screw in the short ones. If you screwed in a long one, there is a risk that you screw it into the heat exchanger tubes, thereby breaking the tightness. wash the hot water heat exchanger. Naturally we clean the mud filter. Just hold the U-shaped bracket and remove the filter. You can clean the fluid flow sensor. It is on the supply pipe of the exchanger. It is a reed switch, controlled by a magnet, this magnet becomes overgrown with dirt and sludge and loses its mobility. The boiler ignites an error 02. They removed the sensor from the tube, unscrewed 4 self-tapping screws and now there is access to the guts of the sensor. ohm and collect everything back. It seems that he indicated all the nuances. You can, of course, assemble a hadron collider from a bucket with a boiler and a Gazelle electric pump. Pour citric acid into a bucket and drive everything through the boiler, like I flush the entire system. But I described my method.

Control board errors

The control board should be considered as the cause of hot water problems when all other checks have failed. The cause may be a malfunction in the flame modulation circuit. The boiler control unit constantly adjusts the burner power depending on the conditions and if there is a malfunction on the board, the boiler can spontaneously reboot or turn off when it reaches its maximum power, which in most cases is required precisely in the hot water preparation mode.

Incorrect configuration is still possible as board errors. But this only applies to those cases when problems appeared after its replacement. BAXI boards are universal and require customization for a specific boiler.

Italian gas boilers Baxi occupy a solid place in the heating equipment market due to their high efficiency, stable operation even in adverse conditions and thoughtful stylish design

... But, despite their high reliability,
sometimes
in the operation of Baksi boilers
malfunctions occur
caused by violation of operating conditions or failure of individual elements of the boiler. Most often, you can eliminate them yourself, without resorting to calling specialists.

The Baksi line of gas boilers includes a number of models that differ in volume, type of installation, functionality. Moreover, the principle of their work is generally similar.

The most popular boiler models:

• Baxi Luna
• Baxi Slim;
• Baxi Main four
• Baxi Main 24 fi (Baxi Mine 24 fi);
• Baxi Nuvola
• Baxi EKO four (Baxi Eko for, Baxi Ekofor).

By installation type

gas boilers are divided into
wall and floor.
Wall heater fixed

using special brackets
in any convenient place,
which makes wall models very popular. Closed-chamber chambers such as the Baxi Main 24 fi offer increased efficiency and environmental friendliness in a small footprint.

Coolant volume

in the heat exchanger depends on the model, in the most powerful it
reaches 80 liters
.
By functionality
model
can be single-circuit
- for heating, or
double-circuit
- in addition to the heating system, they also supply the DHW circuit.

Work

they can
both on natural gas and liquefied
, from cylinders, which makes it possible to install them in non-gasified areas. Boilers
completely volatile
and require an AC voltage connection.

The principle of operation of gas heating equipment:

1. The sensors analyze the temperature in the room, and when the minimum value is reached, they give a signal to turn on the circulation pump.
2. The pump turns on, creating a vacuum in the return pipe, while heated water enters the heating system.
3. The microprocessor gives a signal to ignite the burner at low power, it gradually increases, and the coolant heats up to the temperature set by the user.
4. Further, the boiler operates in modulation mode - it maintains the temperature within the specified limits, turning on when it drops.

At any of these stages, a malfunction may occur, which the boiler notifies with the help of coded errors.

Possible malfunctions of the boiler Baxi Main for, Baxi Main 24 fi, Baxi Eco for:

• the burner goes out immediately after switching on or during the heating process (error codes e01, e04);
• the boiler cannot be ignited;
• overheating occurs (error code e02);
• the water pressure in the system drops (error code e10);
• extraneous noise is heard in the work;
• pops occur in the combustion chamber;
• the coolant does not heat up to the set temperature;
• one of the sensors fails (different error codes may appear).

The most common reasons for the appearance of certain malfunctions, according to the specialists of the service centers, can be:

• wrong
• errors when connecting the boiler to the mains;
• water ingress on the board, into the burner or into the electrical part of the boiler;
• poor quality of network water or other heat carrier;
• a sharp drop in gas pressure;
• the mains voltage drops or inadmissibly increases.

The resulting malfunctions can be easily eliminated by adjusting the boiler, but sometimes it is necessary to call a specialist to replace the boiler parts.

Work principles

Gas boilers, as a rule, have two circuits - heating and water heating. Double-circuit devices are a collection of several blocks responsible for a specific functionality of the system. So, the gas block is responsible for the ignition and combustion of the burner, which allows the heat-conducting liquid to warm up, water is supplied in the water unit and the required pressure in the mains is provided, the chimney unit emits combustion products into the environment, the control unit controls the operation of all boiler systems.

When the unit is started with the help of a pump, water is pumped into the system, passing through the pipes of the heat exchanger. As soon as liquid enters the water unit, the gas supply valve opens and the burner ignites. The process of warming up the heat exchanger body occurs uniformly and is controlled by temperature sensors.

Important! The heating cycle is controlled by sensors. When the water temperature drops to a certain temperature, it is the sensors that transmit an impulse to the control module to resume heating

When hot water enters the mixer, a flow sensor is connected. A signal is sent from it to the board, after which the three-way valve is triggered and switches to heating the water supply.

How does the boiler work?

For a clearer understanding of the situation, you need to understand the principle of the boiler. Such double-circuit gas wall-mounted boilers such as Baksi or Ariston consist of several components. In the gas part, the incoming fuel is burned, the water part provides the supply of heated water from the heat exchangers to the heating system, part of the smoke exhaust is responsible for the removal of combustion products outside the dwelling.

After starting the boiler, the pump is switched on, providing the required water level in the system, and the gas supply valve opens. The heat carrier moves in a heat exchanger, which is heated by the burner flame. The thermostat monitors the temperature regime in the room, temperature sensors monitor the readings on the supply and return pipelines. Also readings of pressure indicators of fuel, coolant in the circuits, the presence of traction and combustion.

Depending on the user's settings, temperature sensors adjust the water heating mode. The sensor on the return pipe turns off the boiler, depending on the achievement of the required temperature set for the return. However, the system pump does not stop running until the temperature of the heat exchanger has dropped.

This is provided so that the water does not boil in it. As soon as the coolant cools down to the limit level, the electronics will send a signal to turn on the water pumping and to the gas valve. The whole process will start over. When you open the tap in the mixer in a double-circuit boiler, a flow sensor reacts, which informs the electronics about the need to switch the three-way valve to the hot water heating mode.

When you turn off the hot water tap, it switches back to heating mode. Some manufacturers provide for both heat exchangers to be heated on a periodic basis.

The heating radiator does not heat up

Most often, problems with normal heat transfer arise in heating radiators. This is due to their specific design - the coolant does not move along 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 locks in heating

There are several reasons for the appearance of air locks in the heating system - excess temperature, water evaporation, etc.

It is important that the consequence of this is the appearance of places in the line that are not filled with a coolant. Most often these are heating 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 a heating radiator does not heat well? The simplest method is the temperature drop at 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 eliminate it, you must perform the following steps:

• Using a screwdriver or a pivot arm, Mayevsky's crane is opened;
• Add water to the system until the coolant begins to flow out of the tap together with the air;
• Shut off the water supply.

After starting the heating system, the surface of the radiator should heat up evenly. Otherwise, repeat the procedure.

Incorrect installation and limescale deposits in pipes

The efficiency of the radiator 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 top 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 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, which prevents 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 water pressure. Under the action of this force, the scale is broken into small fractions and is retained in the pump filter;
• Chemical. Special additives act on limescale, which loses its uniformity and flakes off from the inner surface. Subsequently, hydraulic flushing is performed to remove debris residues.

Experts recommend using a comprehensive method to solve the problem in which the heating battery does not heat up. After checking the correct installation, the system is flushed, and then the correct filling with an open Mayevsky tap.

If the two-pipe heating system does not heat due to clogged pipes, you need to carefully choose the cleaning technology. Chemical cleaning is not allowed for polypropylene pipelines.

Does the coolant affect the quality of heating

Almost all manufacturers of heating devices unanimously recommend not to drain the coolant from the system, perhaps only as a last resort. And there is an explanation for this.
Batteries may be cold due to air pockets. Each time the system is filled, voids are formed, filled with air. Constant circulation of the coolant gradually removes air from the system, discharging it through the expansion tank or dump valves.

Therefore, it is better to use an old coolant for heating. As a result, even if at first the bottom was cold in the battery, the top was hot, and the sections differed in heating temperature, over time the situation can normalize due to the constant operation of the coolant without replacing it.

The optimal solution is to use a special heat carrier. It eats away rust and excludes clogging of pipes and radiators, which significantly affects heat transfer and uniformity of heating.

If independent efforts to achieve uniform heating of the radiator did not work, then it is clearly not worth delaying the invitation of a qualified plumber.

The reason that the batteries in a private house do not heat up may be a number of factors. We can only consider the issue in general. There are various reasons and they are not always obvious. Sometimes such a trifle as a faulty faucet or a clogged chimney can become a stumbling block. Despite this, there are no hopeless situations, the main thing is to determine the reason why the battery does not heat up in a private house, the rest is a matter of technology.

Features of gas boilers Navien

The Navien double-circuit gas heating device stands out among a huge number of competitors for its compactness and attractive design.

Even if low-quality gas is used, subject to the requirements and recommendations of the manufacturer, the Navien gas boiler will delight the owner with reliable and long-term work of complex and expensive repairs.

Gas boiler Navien is able to maintain functionality with voltage drops of up to 30%, a drop in gas and water pressure in the supply lines. Navien boilers, regardless of the type, are equipped with systems that guarantee uninterrupted operation in various operating conditions. The anti-freeze system will prevent water from freezing during the cold season.

The control system is intuitive and adjustable remotely. The construction uses steel heat exchangers, which guarantee high efficiency and long service life.

The air pressure sensor used in the circuit ensures complete combustion of the fuel, which leads to cost savings. The water heating mode is turned on simultaneously with the opening of the hot water tap. The burner is automatically turned on, and when the tap is closed, the system is put into standby mode. The boiler only heats water for the heating system. The winter-summer mode automatically switches the system to DHW or vice versa.

The Navien boiler has a closed combustion chamber. The coaxial smoke exhaust system excludes the ingress of combustion products into living quarters.

A wide range of temperature settings, both room and hot water, makes the Navien boiler competitive even with representatives from high price categories.

DIY Baxi boiler repair Video lesson

Burner flame does not reach maximum power

The fault may be caused by an incorrect pressure setting in the heating system, a malfunction of the gas valve modulator or a breakdown of the diode bridge.

Remedy: adjust the system parameters using the boiler operating instructions.

The boiler starts up and stops working immediately

The reason is the low gas pressure in the gas pipeline.

Remedy: reduce the value of the incoming gas pressure to five mbar (standard - twenty-five mbar).

Weak heating in the hot water system

The reason for this is the incomplete opening of the three-way valve or its breakage. To confirm a valve malfunction, let the system cool down, close the shut-off valves of the heating system, then turn on the boiler in hot water supply mode. If the valve is faulty, then simultaneously with DHW heating will occur in the heating system.

"Pops" are heard in the boiler during firing up

Such noise appears due to: insufficient combustion of the gas (adjustment of the minimum pressure is required); changes in the distance from the gas supply to the igniter during inaccurate transportation of the baxi boiler (you should adjust the size of the gap by setting it to 4-5 mm); excessive draft (using the damper to reduce the draft in the boiler).

How to adjust the gap between the burner and the pilot

Open the front panel and completely remove it from the boiler. Remove the flap from the inspection hole. Behind it is the igniter

To change the size of the gap, it is necessary to unscrew the screw on which the ignition electrode is attached, then remove and carefully bend the electrode. Then we put it in place and close the hole flap.

A sharp decrease in the temperature of the coolant in the circuit

The reasons for this are: clogging of filters (cleaning or replacement is required); damage to pipes, radiators, their clogging or freezing (the malfunction must be identified and replaced or cleaned the defective section of the pipeline).

How to clean the primary heat exchanger with your own hands (video)

We drain the water by unscrewing the tap on the boiler on the right. If possible, drain the water from the heating system. For cleaning we use a device called Jel. We connect the pipes of the device to the heating pipes of the baxi. We unscrew the lid on the device, fill in the cleaning liquid.We include Jelly in the power grid. Within a couple of hours, use the handle on the device to switch the direction of the flushing liquid "forward - backward" After two hours, turn off the device, turn off the tap to drain the water from the boiler. We remove the hoses, making sure that the flushing fluid is glass back into the device. We connect the boiler to the system, fill it with a coolant. Cleaning the boiler will remove scale from its parts and prevent clogging and breakdowns.

Cleaning the secondary heat exchanger (heating circuit)

We use the flushing device again. We connect it to the boiler, turn it on. Close the gas tap and open the hot water tap. And after that we turn off the device for cleaning. Thus, the liquid will be driven along the short circuit of the system.

Before installing the boiler, its operation and repair, be sure to consult with a specialist. Despite all the positive qualities of baxi boilers, they, like all equipment, have their own margin of safety and service life. In this article, we examined the main types of breakdowns, and also saw how to repair baxi boilers with our own hands. We wish you and your boilers success.

Baksi is the name given to a line of gas boilers from an Italian company. If you are faced with the task of providing a comfortable microclimate in the room, then Baksi boilers are the best solution. The installations of this manufacturer have many advantages. Most importantly, Baxi boilers are economical. In addition, they can be operated for a long time and not emit noise during operation. These units show good performance during use and are easy to use. The reasonable price for this equipment makes it affordable for most consumers.

Frequent malfunctions and measures for their elimination

The burner flame does not reach its maximum power during boiler operation

This malfunction of the gas boiler may occur due to an incorrect pressure setting in the heating system. Also, such a breakdown may appear with a faulty gas valve modulator. Another reason for its occurrence is the breakdown of the diode bridge.

Remedy: it is necessary to adjust the system parameters using the boiler operating instructions.

The boiler starts up but stops working immediately

This malfunction of the gas boiler can occur due to low pressure in the gas pipeline.

Remedy: it is necessary to adjust the gas pressure down to 5 mbar.

Weak heating of the coolant in the heating system

Remedy: Perform a pressure test on the gas valve. Chances are high that min and max have failed.

Modulation mode does not work

To correct the problem, a valve change should be performed.

Temperature sensor values ​​become inaccurate

To eliminate this problem, replace the old sensor with a new one.

Weak heating in the hot water system

The cause of this malfunction may be an incomplete opening of the three-way valve. In some cases, its appearance is associated with a breakdown of such a valve. To establish exactly what the cause of the malfunction lies precisely in the valve, it is necessary to wait a while until the system cools down. Then the shut-off valves of the heating system will need to be closed. When this is done, the boiler should be turned on for hot water supply. Valve failure will be confirmed by heating in the heating system.

When the installation is fired up, "pops" are heard

Noise can appear for several reasons:

• Insufficient gas pressure;
• Changed distance from the gas supply to the igniter due to inaccurate transportation of the Baksi boiler.

To eliminate this problem, you need to adjust the size of the gap. It should be set within 4–5 mm.

How to adjust the gap between the burner and the pilot

To make the correct adjustment on the Baksi gas boiler, you must open the front panel and completely remove it from the boiler. After that, it is necessary to remove the damper from the inspection hole of the installation. Behind it you can find an igniter. To change the size of the gap, unscrew the screw by means of which the igniter electrode is attached to the boiler. Then it is removed, and then it is carefully folded over. Then you need to install it in its original place, and then close the damper.

The coolant temperature in the circuit has dropped sharply

The main cause of this problem is clogged filters. They must be removed and cleaned. In some cases, they may need to be replaced. Damage to radiators or pipes may also be the cause. If these heating systems are frozen or clogged, then repair is necessary. The area where the defect was found should be cleaned or replaced.

How to clean the primary heat exchanger with your own hands

The first step is to drain the water from the installation. To do this, unscrew the tap on the boiler on the right. If possible, the water should be drained from the heating system. For the cleaning procedure, you should use a device called Jelly.
The pipes of the device should be connected to the heating pipes of the Baksi boiler.... Then you need to unscrew the lid on the device, and then pour in a special liquid intended for cleaning. Then the device is connected to the mains.
For several hours on the device, we switch the direction of the flushing liquid in manual mode. When two hours have passed, the device must be turned off. Next, unscrew the tap to drain the water. Then you need to remove the hoses. But before that you need to make sure that the liquid is glass back into the device... Next, we connect the boiler to the system. After that, it must be filled with a coolant. After cleaning the boiler, its parts must be descaled. And this will exclude clogging of the system and its failure.

Do-it-yourself cleaning of the secondary heat exchanger (heating circuit)

In order to clean the secondary heat exchanger, we also use a flushing device. It must be connected to the boiler, and then turn on the installation. The gas cock must be turned to the closed position, and the hot water cock must be opened. After that, you must turn off the device for cleaning. Further, the liquid will circulate along a short circuit.

Before installing the boiler, you need to consult a specialist. You should also contact him in the case when the boiler needs repairs. Baksi gas equipment, like any other, has its own ultimate strength, therefore, at a certain moment, boiler repair will be required.

The main problems are why the boiler does not heat water

More often, boiler malfunctions are detected during the heating season, when both circuits of the device are working. There are two main problems faced by the owners of wall-mounted gas boilers, such as "Ariston":

• all boiler systems are working, the device turns on, but heats the water weakly or does not heat at all;
• the boiler does not start and, as a result, hot water is not supplied.

Each of these problems has its own reasons and solutions. To troubleshoot problems, you need to figure out what caused and caused them to occur.

Before finding out the reasons for the malfunction of the unit, you should look at the operating manual, read the instructions and check the correct settings and connection of the device.

Note! Modern gas boilers are equipped with a diagnostic system that detects malfunctions and displays an error code on the display. Instructions for the unit will help to decipher the codes

If all the requirements and conditions are met, the most common causes of malfunctions should be considered:

• Blockage.Experts say that the use of unfiltered working fluid increases the risk of blockage in the heat exchanger tubes. The formed scale reduces its thermal conductivity, which forces the unit to operate with excessive consumption of the energy carrier. In this case, the optimal temperature regime is not achieved even with continuous operation of the device. Due to limescale deposited inside the heat exchanger pipes, the metal undergoes corrosive changes, which can lead to its rupture.
• Defective pump. The circulation of the coolant can be stopped due to the accumulation of air, the so-called airlock in the pump. A second cause of pump malfunction may be the rotor, which is seized. A circulating pump that stops functioning can lead to overheating of the gas boiler.
• Flow sensor stuck. Inside the boiler is a turbine-shaped sensor that resembles a small fan. When the turbine rotates inside the sensor, an electrical impulse is generated due to the fluid flow, which is fed to the control unit. Thus, the electrical system understands that it is necessary to warm up the coolant.
• The 3-way valve is stuck. Such a malfunction will not allow switching the water supply from heating to DHW. A valve stopping can occur due to a blockage, both of the part itself, and of the gas hose or filter.
• Insufficient pressure. If the volume of liquid in the system does not create the required pressure, the water supply valve does not open, which leads to the failure of the burner to ignite.

Heating boilers malfunctions

Basically, major malfunctions begin to manifest themselves during the heating season, when two boiler circuits are operating - heating and water heating. It may happen that it does not start at all, or it does not heat well enough. With the launch, the issue will have to be resolved separately, but if it does not heat the water enough, then the reason may be in the clogging of the heat exchanger. As you know, the water quality in our systems is far from ideal, and besides, few of the users install it in front of the boiler. So the heat exchanger becomes clogged, which results in poor boiler operation.

Here are the most common malfunctions of gas boilers in the event of which it weakly heats the water:

• periodically turns off spontaneously,
• smokes heavily,
• does not develop enough power,
• makes a noise
• clogged
• the pump has broken.

If it happens that the gas boiler does not heat the water, then often the reason lies in the formation of limescale on the walls of the heat exchanger, which, as it accumulates, becomes very durable and not only lowers the water temperature, but also reduces the boiler throughput. The thermal conductivity of scale is ten times less than metal, so it is not surprising that the boiler does not heat water. If you do not take any preventive measures, then very soon you will have to completely disassemble the boiler and remove deposits mechanically.

Only timely can help this trouble, and it should be done regularly, especially if no cleaning and softening filters are installed in front of the boiler. For flushing, special chemicals are used, but they should be used with great care, since they are equally destructive to lime deposits and to the material from which the heat exchanger is made. It is best to invite a specialist for this purpose.

Preventive maintenance is recommended for the safe and efficient operation of the gas boiler. It is advisable to do this regularly before the start of the heating season; you should not wait for a situation when the boiler does not heat the water. This approach will ensure a long service life and economical operation. Overhaul is carried out as needed by an employee of the service center - it is strictly forbidden to do this on your own.

Vailant boilers are particularly reliable and safe.Breakdowns of such complex equipment must be eliminated by a master. But, minor faults can be removed on your own if you have a basic level of knowledge about the design of heating and heating boilers.

Most of the faults are indicated on the boiler display. With the interpretation of the errors, you will be able to figure out what is the reason for the failure of the boiler to heat the water. Where to start the search if the water heating in the Vilant boiler does not work, and the indicator does not show an error, or it can be interpreted in different ways?