The three way valve of the Vylant boiler flows

Vaillant boilers adjusting

Gas boiler Weilant, 24 kW atrifeck 3-5, single-circuit, in operation 2nd season. It works for a hot water and TP (there is a radiator circuit, but the radiators were removed and drowned out last season). Periodically issues F75 (and now I have started to do it once a week), please advise what to see first of all? One. When the unit did this for the first time last fall and repeated the F75 error after resetting, I pressed a slightly output ball crane for heating, but then this error disappeared last fall, and now I began to arise again and more and more often. 2. Air in the system. The system has not been fueled since last season, the pressure on when operating 1.7 atm. (as last season), car carriers are open. 3. The water in the system is distilled (with corrosion inhibitors of the “prepared boiler” type, took in 50 liters of barrels), the consumables are still transparent and you can see how they tremble during operation (consumption from 1 to 2 liters on different TP branches). 4. The boiler works on a hydraulic shotgun or boiler (through the built-in 3x-lane valve), and according to thermometers on the supply and return to the boiler (mechanical thermometers with bimetallic springs), it is clear that the three-way valve works correctly. 5. But, for some reason, when working on a hydraulic region (heating) when pressing the buttons “-” or “” (and on the heating of the boiler, pressing these buttons shows data from the sensors “-“/return/””/feed/), first shows that less than a feed, and then it can be vice versa, although with a hand (it is felt on the GS that this is not so). 6. The bypass valve inside the apparatus was opened until today at 3 turnover, and now it has completely closed. Previously, a jump in the pressure on the LCD-display (from 1.7 to 1.8) was visible at the start of the boiler pump before the ignition. Now it is not visible, but, nevertheless, the unit is more often kindled than not (sometimes not the first time due to the urge to F75). By the way, what is the jump in the volts from this sensor? T.E. The pressure sensor is buggy? Why, when working on a hydraulic engineer, with a “pressed” tap on the supply, shows that it is less than the supply, although the back is felt by the hand on the hydraulic rifle. And there is where to take the calibration of temperature sensors of feed/return. Volts on the sensor and the temperature on the display? Maybe they are faulty? Maybe the boiler pump is faulty, does not develop the necessary revolutions, although he worked only on a hydraulic shotgun and a boiler.

By mistake F75: it is worthwhile to clean the aggregate pressure sensor.

Installed boiler Vaillant 240/3-3. Problems with DHW began, or rather, “hot water” flows a little warm. Today I shot a three.Way valve, washed, but there was nothing faulty. Once again I was convinced that everything works in it, the rod from the motor moves. I am tormented by one question. Why is the DHW (hot water supply not heated)? So, I’ll describe in more detail: there is a heating mode, the rod on the three.Way valve is put forward, thereby the reverse of the return from the secondary heat exchanger is blocked. Batteries are heated, everything is fine. I open a crane with hot water (for example in the kitchen), the stem is pushed inside, thereby opens the return hole and theoretically must overlap the hole coming from the heating return, but we will allow that it does not overlap the heating hole and block the feed and heating with the taps on the boiler. But still water from the hot water flows slightly warm. What could be? The secondary heat exchanger removed, washed it with salty. From the holes of the heat exchanger through which heating goes, water flies without problems at all. Through the holes in which the water supply is going on, t. E GVS, when flushing, the water goes with a little difficulty, but if the heat exchanger is on the unit, then the water from the crane goes great. Before that, the secondary heat exchanger was clogged, and the water stream was with a little finger. I washed it right on the boiler using a pump and acid. Was the acid to break through the heat exchanger when washing, so to speak the new path, in which water does not have time to heat up?

Why the DHW does not heat up, there can be many reasons. The first to ask. Replacing the secondary heat exchanger. Second, and suddenly the unit does not reach full power? Third, there may be a temperature sensor.

I have a question about the wall boiler Vaillant 240 3-3. The three.Way valve has stopped switching to the DOS mode (the GVS mode itself includes the aggregate mode). The valve was glued, was replaced by a new. After replacing the DHW mode still does not pass! The servo pushes the valve only into heating, does not draw back (the old drive works similarly). Really a fee?

ATMOTEC PRO VUW int 240/3-3 boiler, after washing the secondary heat exchanger, the aggregate does not warm the water in the DHW mode, I put 75 degrees on the handle, the water is really 45 degrees, it is possible to increase the temperature of the degrees to 45, you can only reduce the stream to a minimum. When the DHW mode is turned on, the burner lights up well for the first second, then the gas supply decreases and burns at a minimum. It does not show errors, the condition shows how it should be “analyzed hot water”. Everything is good in heating mode. Services offer to replace the secondary heat exchanger, they say should help. Who has come across such a problem?

DHW at 75 degrees is not exhibited. Maximum 65. Look at what you are twisting. To prevent the receipt of burns when using hot water, manufacturers limit the maximum temperature of the hot water on units 60-65 degrees. Most likely, the secondary heat exchanger did not wash off the heating circuit. The heat supply does not occur in the heat exchanger, therefore the flame is reduced.

We bought a double.Circuit wall.Up boiler Vylant Turba Text about 24, but the matter of installing and turning on heating reached only this fall. At the end of November, he launched a boiler to heating the VTP on the second floor (50 g. At the exit, I did not bother), I use distilled water as a coolant. After starting, everything was fine, but then a quiet rustle appeared when the pump turned on. After heating the rustle disappeared. Gradually the rustle intensified, and now it is quite loud, after warming up the noise, rustle, even the rumble does not disappear. Today I turned off the heating, merged water, removed and dismantled the Weland pump. There are no extraneous objects and dirt, but the impeller standing in the cylinder (inside the pump, 3-4 cm in diameter and 10-12 cm in length) has an axial backlash. She rustles, noisy. If you take Wilo, which is suitable for my device? Heating launch was made by plumbing. At first they filled the boiler, then the VTP and launched. Everything worked fine. The boiler is powered through the Teplocom ST.-1300 stabilizer.

These pumps have been working for years if you open the air venturer when starting up and release air from the central cork.

The purpose of the three.Way valve for the heating boiler

The autonomous heating system is a much more complex mechanism consisting of a large number of interconnected nodes and assemblies that perform the corresponding functions. The three.Way valve for the boiler in this mechanism plays the role of the mixer in which the temperature of the coolant is adjustable.

This is done so that the pipes warm up evenly and the heating level in each room is approximately the same. If you do not use the part, it turns out that the water when passing through the heat exchanger will not heat up the same, and as a result, part of the rooms will receive less thermal energy than all other rooms.

Valve device

As for the technical characteristics, this parameter must be clarified in the registration certificate. Do not try to attach a spare part to the boiler, which does not fit in size, since it will still not function normally, but the trouble in the form of a serious breakdown may well appear due to such actions. And in the end, the desire to save will lead to additional costs.

A three.Way valve for a solid fuel and gas boiler is also no different in the device. The type of fuel used to obtain thermal energy does not affect the features of the coolant circulation. The fact is that the valve does not contact the combustion chamber in any way, so it does not need to be adjusted to the type of heating system.

As for the coolant, you in 100% of cases, Russian citizens use ordinary water. This is due to its accessibility and the absence of any problems with operation. It makes no sense to invent anything if heating works so well and has many years of successful experience.

These parts of bronze or stainless steel are made. Polymer analogues are still of little common, although in the future it is possible to predict an increase in their number if they show themselves well in operation.

The device of the three.Way valve of the gas boiler is very simple. It has a T-shaped look with two input and one output hole. Inside there is a special membrane that is regulated from different sources to flows so that the optimum temperature is achieved.

There are automatic and mechanical options.

  • In automatic movements, the membranes occur by themselves, depending on the temperature indicators of the coolant.
  • In mechanical units, the position of the separator is exhibited manually, so that you need to additionally install thermometers on each incoming pipe in order to be able to monitor the temperature value.

So the principle of operation of the three.Way valve of the boiler is based on all known laws of physics.

Types of valves

  • One. A three.Way thermostatic valve for the boiler is an automatic model. He will maintain a given level of temperature without additional intervention from a person. At the same time, the most functional models are equipped with an additional safety system that blocks the movement of the coolant if there is no circulation on one of the incoming pipes. Thus, there will not be boiling in batteries.
  • 2. A three.Way TERMOMOMOMMENTAL valve for a boiler can be equipped with both automatic and manual control. The fundamental difference will be the need for regular verification of the state of the system so that it does not overheat it. Today, more advanced units have been replaced by mechanical devices today.

Connection and operation

The connection of the three.Way valve to the boiler is carried out according to the only possible scheme, so that nothing can be confused even with a special desire. It makes sense to hire a master only if the replacement is made under warranty, and nothing needs to be paid for it. Otherwise, you can do everything yourself for half an hour and save several hundred.

The device described above clearly demonstrates that the unit consists of a minimum number of details, which means it has high reliability. The three.Way valve of the gas boiler can only be manifested only in violation of the tightness of the case or the failure of the membrane. There is absolutely nothing to break. Breakage occurs extremely rarely and may be a result of factory marriage or improper use.

Repair of the three.Way valve of the boiler from an economic point of view will be absolutely inappropriate. You can, of course, try to paste out the leaky case, but soon a hole is formed in it again, since this process is already irreversible.

At the same time, a new device can be bought for 500-700, replace and do not know for many more years about problems with this knot. And it will be already impossible to fix the internal membrane due to the complexity of access to the place of breakdown.

That is why the AGV 80 ausal boiler, which remained in the house since Soviet age, has been successfully exploited so far. Many residents independently equipped their heating unit with foreign production details, which increased at times.
With the GSM module, the boiler owner will be aware of the current state of the heating system and will be able to receive information about the malfunction of any sensor in a timely manner. Change basic settings for the desired using the device also.

Popular malfunctions of a gas heating boiler and ways to eliminate them

When installing a gas boiler at home, the owners hope that the batteries in the rooms will be hot, and the unit itself will function stably, providing good heating in the house. However, no one is safe from the occurrence of breakdowns. Let’s try to figure out why the gas boiler is turned off and what other malfunctions can occur during the operation of the equipment.

Modern heating boilers are very reliable, but no one is safe from the occurrence of breakdowns. Most often, malfunctions of heating boilers arise as a result of operating errors, as well as if inaccuracies were allowed during installation.

If the owners have noticed that the equipment does not work well, and the batteries in the rooms are cold despite the fact that the boiler is installed at the maximum level, you need to stop the unit and find out the reason for the problem. Most likely, it will not work to find out the cause of the breakdown on your own, so it is better to immediately call a specialist from the service center.

Classification of faults

When contacting the service center, it will not be enough that the equipment works poorly, you need to describe the signs of a malfunction as fully as possible. All breakdowns are divided into several groups united by common features, they can be:

Modulating Feedwater Valves for Boilers. Steamworks

  • Interspersing or final. In the first case, the equipment works, although it is bad, without going to the working parameters. In the second. A complete refusal takes place, that is, the gas boiler does not warm the water or does not even turn on.
  • Primary or secondary. Primary calls of boilers that arose for the first time are called. Secondary malfunctions are malfunctions that occur periodically, provided that the repair was not carried out.
  • Sudden and growing. The first group includes breakdowns that happened unexpectedly for the owners, that is, before the failure, the hosts did not notice any malfunctions behind the boiler. The second group included breakdowns, which developed gradually, that is, the owners have long noticed that the unit works poorly, but they did not take measures.
  • Obvious and obscure nature. The obvious ones include leaks, the refusal of some equipment blocks. Unobvious malfunctions can only be detected by a specialist with special diagnostic equipment.

Why is it cold in the house?

It happens that people complain that they have a poor heating work. The unit seems to turn on properly, and the batteries are cold. Naturally, this significantly reduces the level of comfort. Let’s try to figure out why the batteries do not warm with a working boiler. Most often, the reasons for the fact that the batteries in the rooms are cold, as follows:

  • The built.In circulating pump failed, in this case, the coolant heated by the boiler will not be removed and the batteries will remain cold, even if the unit is launched at full power;

Advice! Such a malfunction is often detected after prolonged downtime boilers. During the summer period, lime deposits can be covered in the summer period, which will not allow the device to function normally.

I must say that the reasons for the fact that the heating in the house is bad and the batteries do not warm are not always connected with the boiler. The reason for the lack of normal circulation may be the presence of air traffic jams in the system.

Therefore, the batteries during installation are necessarily equipped with Maevsky taps and, before starting the heating unit, it is necessary to lose the air that may be in the system.

Often the reason that heating in the house works poorly is an ordinary scale. She settles in the pipes of the heat exchanger, narrowing their clearance and reducing thermal conductivity. Therefore, as a coolant, it is better to use not tapeworm, but specially softened water.

If the boiler does not work well for heating, and hot water regularly enters the water supply (we are talking about a double.Circuit unit), then the cause of the malfunction is most likely in the three.Way valve.

The reasons for the attenuation

It happens that the boiler burner first lights up normally, and then dug in almost immediately. The main reasons for this problem:

  • Insufficient intensity of traction or “reverse traction”, which blows the flame of the burner;
  • Thermocouple malfunction;
  • Fault of automation systems, in particular, traction sensors.

Problems with traction

If the gas flows normally, and the burner lights up, and then quickly goes out, the first thing to check is the thrust. This can be done independently. It is enough to bring a lit candle to the duct and see how the flame tongue will behave. With good traction, the candle burns evenly, and the flame tongue stretches up. The reason for the deterioration of traction may be:

Eliminating the blockage is quite simple, you just need to clean the chimney. But about how to eliminate the formation of reverse traction in bad weather, you need to consult with specialists. Sometimes it is enough to put on a special “fungus” on the end of the pipe.

Thermocouple problems

This element is used to protect against overheating. When a certain temperature of the thermocard is reached, the unit turns off. After the coolant cools down, a signal for turning on the boiler is received.

If a thermocardor fails, then it can signal the need to turn off almost immediately after starting. If the cause of the malfunctions of this, then the thermocouple will have to be replaced, since this element cannot be repaired.

The problem with the sensor

Organizing heating in the house, today they almost always use automation systems that ensure the safety of residents of the house. One of the components of such a system is the traction sensor that turns off the equipment if the craving of insufficient intensity.

If this sensor fails, then the boiler cannot be launched, since gas supply will be blocked. Therefore, to carry out the repair, you will need to replace the sensor.


It happens that heating in the house is functioning properly, but a soot began to appear during the operation of the unit. This happens if an insufficient amount of oxygen enters the furnace.

Because of this, the gas in the furnace does not completely burn out, which leads not only to the appearance of soot, but also to a decrease in the efficiency of boilers. To eliminate the malfunction, it is necessary to adjust the air supply to the furnace chamber.

Functional use of the device

If we consider the mechanism of switching flows from the point of view of possible functionality, the difference in devices on the principle of action should be noted:

The dividing principle of operation involves the division of the flow, directing it into two contours.

The switching function provides for the organization of switching between devices consuming thermal energy. For example, switching between the contour of the hot water and heating of the double.Circuit gas boiler.

TA-6-way valve: The most precise and flexible changeover solution

The switching functionality of the valve (classic scheme): P is the primary circuit; B. Secondary circuit; 1, 2. Direct transport channel; 3, 2. Corner transport channel

Switching functionality allows you to organize effective switching between various devices that generate thermal energy:

Another three.Way valve function for a household gas boiler. Mixing. It allows you to organize adjustable mixing of the fluid flows (mixing the return into heated coolant).

To do this, it is enough to install a three.Way valve on the return pipe of the heating system.

Veteest functionality of the valve (classic scheme): P. Primary circuit; B. Secondary circuit; 2, 1. Direct transport channel; 2, 3. Corner transport channel

Now, after a brief familiarization with the structural details of the device, you can consider the features of checking the work of the three.Way valve installed in the gas boiler diagram.

The main breakdown and repair of the Vaillant AtmoteC boiler

Gas boiler Weland atmo Te Te plus does not want to start. When you hold the start button, the burning device operates. But it is worth releasing the button, the device will immediately rot. What is the cause of the malfunction?

Most likely, the thermocouple or breakdown of the gas valve is damaged. There may also be a decrease in gas pressure on the input pipes. Sometimes there is a lack of voltage of the electronic board.

Recently there was a problem. The ignition is very difficult. The smell device is ignited, but there is no flame on the main gas.Regional equipment equipment. Help me figure out what is the reason?

It seems that the malfunction of the ignition device. You will need to check the device and clean the ignition unit.

Why is the Viallat AtmoteC Pro 240/3-3 wall boiler stopped turning off at the time when it catchs the necessary temperature? Heating goes to 85C, then falls into the failure. When rebooting, the situation begins again.

Apparently, the board was out of order, the temperature sensor of the boiler water has damage, the protection button from overheating has broken. It is possible that the automation adjustments have arisen.

Tell me, because of why the heating temperature cannot rise above 70 degrees? We need to increase the temperature, but on the display it is displayed that this is the maximum parameter. How to adjust the heating temperature?

If the device cannot increase the temperature in the heating circuit, then the following reasons are likely. In adjustments, a limit of the maximum heating temperature is set not higher than 70C. There is a decrease in the rod speed in the chimney.

The boiler Atmotec Plus 240/5-5 unsatisfactorily performs work during heating the DOS circuit. From the tap can go mixed either cold water, then hot. Help, please, what reason can it be?

valve, vylant, boiler, flows

The causes of a functional failure apparently such. There was a cold water in view of the fact that the 3-way valve is faulty. The heat exchanger clogged with garbage. You should clean it.

Water leaks constantly occur from the tap at the bottom of the boiler. The device itself does not turn on. What do we have to do?

Perhaps there is a drop in the coolant from the valve. This situation indicates increased pressure in the system. It could also not be blocked by the valle of filling the system or it is recommended to pump up the expander tank.

Could you tell me why an increase in pressure occurs intensely, and the water discharge valve is also triggered? On the screen, a symbol of heating is invariably given when heating the unit. What can be done?

There is a malfunction of the heating line the temperature sensor. The coolant is poorly circulating in the heating system.

For what reason does the gas boiler of Weland atmo text constantly turn off? Today the element of ignition did not work at all. The unit was cleaned a month ago. What’s the matter?

We can assume that functional disorders have occurred in the smoke removal system. You need to check the chimney. The refusal of an element of ignition may indicate a breakdown of some part due to the voltage difference or water fell into it.

Help me deal with the chimney channel? Soon for three days, as the reverse craving appeared, because of which smoke penetrates immediately into the room. I made a chimney myself. It is a steel pipe. It seems somewhere an error has been made.

The unit heats up household water without problems, but at the time of heating starts, the water quickly reaches a boil, and the device gives out a failure. What is the malfunction, and in what way it is to eliminate?

Apparently, the circulation pump is unemployed, the electronic board, the temperature sensor is faulty. The filter grid can also be polluted.

At the stage of hot water supply, the boiler in turn began to give out either hot or cold water. I don’t understand what it comes from. How to establish water heating yourself?

Most likely, the heating system clogged or you need to clean the heat exchanger. There may also be a breakdown of the pressure control relay or the circulation pump is faulty.

An important factor is an incorrectly manufactured chimney structure. Often the deposition of soot on the walls of the pipe occurs, which significantly lowers its useful action coefficient. It is also recommended to check the ventilation in the house.

We use a double-circuit boiler Vaillant AtmoteC VUW 240/3-5. It instantly produces a temperature set above 96 degrees, and then is blocked with an error. In the future, when it cools it, it may turn on. What is it connected with?

The overheating accident means the cessation of the circulation process. Previously, the position of the cranes on the radiators should be controlled. They are installed open. Following the cleanliness of the filter-gryazer is monitored, and it is also necessary to make sure that the heat-reproductive device contains scale.

Commissioned the same model in 2015. After about a month and a half, the device sometimes began to make a noise. Tell me why in the boiler noise?

Perhaps the presence in the heat exchanger of the scale. When the water is hard, then in the future, a lime plaque accumulates on the wall of the pipes.

They would like to put in a country house to put a double.Circuit gas boiler Vaillant Atmotec Plus vu. Tell me how to unmistakably it is recommended to launch this device into the work?

To properly start the operation of this device, the following actions must be done. We turn on the electric power supply of the device. Open a gas crane. Then we turn on the burner device. Then configure the required temperature.

We want to perform maintenance. Instruct how to correctly drain water from the device?

In accordance with the instructions, this work is carried out as follows. Disconnect the device from power supply. Block the gas valve. Open the air engineer. Open the drain crane. Next, collect the spilled liquid. If necessary, you can drain the water through the reset valve. Such a component is installed from the bottom of the boiler device.

Tell me how to diagnose the work of the 3-running valve? It seems to me that he does not stop the discovery. In heating mode, distant batteries cannot pump, although the pipe for heating under the boiler is very hot at hot water supply.

Indeed, it is necessary to look at the three.Way valve regarding the freezing of its rod in the middle position. In turn, we recommend that you examine the heating system itself.

What malfunctions can be in Viland boilers

The malfunctions of the gas double.Circuit wall boiler Weilant are divided into several groups, due to the occurrence of malfunctions.

If necessary, all problems can be very quickly eliminated. To do this, it is enough to know the main malfunctions and errors that will be reflected on the electronic board.

Important! In the absence of the required experience, a specialist should be engaged in a full.Fledged repair who will immediately reveal the cause of incorrect work and eliminate it.

Gas boilers Double.Circuit wall.Up Wylant have several common malfunctions:

  • Error F22. Lack of water or its lack for work. Eliminated by checking the pump that can jam. You will also need to check the connection of the cable with the pressure sensor. Also, such a mistake pops up on the scoreboard with a weak level of circulation.
  • Error F28. Equipment cannot be launched. There are a lot of reasons for such an error, including improper connection or oversaturation of air. Most often occurs with improper installation, as well as neglect of the instructions for operation. The solution to the problem is a complete check of the installation and change of settings.
  • F29. The burner goes out or is not at all kindled. Among the reasons, improper grounding is most often manifested, as well as a gas failure. Damage or incorrect operation of the gas valve is possible. In such cases, it is worth initially checking the pressure in the system, as well as the presence of air for ignition.
  • F36. The combustion product goes out of the system to the room. Typically, the source of the problem is poor ventilation or poor thrust. In addition, such a failure occurs at increased temperature in the room.
  • F75. The pressure does not increase, while the pump works. This situation may occur during the breakdown of the pump or pressure sensors. In addition, air can accidentally get into the system or the expansion tank was incorrectly connected.

Important! When installing equipment, the diagnostics should be made by a specialist or person with experience, as this will help to avoid most errors.

When installing, diagnostics should be previously carried out, which will reveal all problems. This procedure is mandatory. Most of the problems are associated with improper installation and operation. In addition, breakdowns also more often arise under such conditions.

It is worth considering that problems can be caused by various reasons, including mechanical damage or a failure in the electronic control system. Most of the problems will not appear with annual maintenance and proper operation.

It is also worth considering that with a number of breakdowns, the electronic scoreboard will not work. Each specific case uses its own way to eliminate the negative factor. If there is no understanding of what the problem is, then it is better to contact specialists who will eliminate the problem without additional damage to equipment.

Before filling, it is necessary to thoroughly rinse the heating system (large particles remaining after installation work can damage the actual mechanisms)

Check the condition of the automatic air vent on the circulation pump, if it is closed, unscrew for 1-2 revolutions

Cut valves on heating radiators or thermal drives should be completely open

Fill the heating system to a pressure of at least 1 bar (usually 1.3. 1.5 bar)

Turn on the boiler and check the pressure, if necessary, still feed the system

Be sure to check the gas deflector availability of leaks

Vaillant requires filling the system with a tough with a stiffness of not more than 20 units according to the German calculus system and prohibits the addition of antifreeze or corrosion inhibitors to the system.

After the system is filled, it is necessary to perform the P0 air removal program, in which only the pump will work in a specially provided mode, and excess air from the heating circuit and the DOS will be removed

For further normal and safe operation, as well as maintaining a guarantee, any equipment requires compliance with a number of conditions:

The voltage in the network according to PUE standards and the obligatory grounding of the boiler (there should be no potential between zero and “land”, Vaillant allows no more than 1.5 volts)

The compliance of the system as a whole of the capacity of the installed equipment (lack of heating power or DHW prohibits launch). The constant operation of the boiler at the power limit will quickly lead to the failure of the unit.

Checking compliance with the installation standards of the chimney (for atmospheric boilers the presence of traction, for coaxial chimneys, the departure of the pipe and tilt towards the street)

Installation manual also prescribes to install coarse filter on the supply of cold water into the boiler and on the reverse pipeline of the heating system, as well as a gas filter.

It is better to study the commissioning process in more detail in the instructions for a specific boiler model.

The selection of a verification program (fraud, filling out the system) is launched by turning on the boiler and simultaneously holding the “” button for 5 seconds. The selected program is activated by the “i” button. Five programs have been preinstalled for TEC boilers.

The maintenance of a gas boiler is recommended to be carried out annually. Basically, service is reduced to visual inspection and preventive cleaning of the main nodes: heat exchangers, combustion chambers, coarse cleaning filters and the condition of the expansion tank.

The primary heat exchanger is cleaned outside from soot with a soft brush. In no case can not be used with metal bristles, t.To. Copper plates are treated with a special anti.Corrosion coating and its damage will lead to a serious reduction in service life. Due to the constructive features, primary heat exchangers from the inside in most cases are not amenable to washing, its service life can seriously decrease from the use of antifreeze or frequent water supply of increased hardness.

The secondary heat exchanger (DHW) due to the constant passage of water through it is more subject to the formation of deposits and scale, but at the same time it can be successfully washed with a certain frequency. Washed heat exchangers with special installations (boosters) using special equipment. The process consists in prolonged (sometimes up to several hours) pumping chemical agents that contribute to the dissolution and leaching of scale. Valiant recommends washing with ordinary acetic acid.

The expansion tank is intended to compensate for the thermal expansion of the heating system and is also annually subject to maintenance. It consists in measuring its pressure. Measurement must be done on an emptying boiler and, if necessary, pumped up to the value of the static pressure of the system (approximately 1-1.2 bar). If water comes out of the control fitting, this indicates not the tightness of the tank membrane and the need to replace it.

It is necessary to rinse and clean the heat exchangers in a timely manner, because the dirt and deposits of the scale reduces the thermal conductivity and the passage, which leads to a decrease in the economy of the boiler and overheating, and subsequently expensive replacement.

It is recommended to set the temperature of hot water supply so as not to dilute it with cold water, thereby ensuring minimal heating. The smaller the temperature of the hot water, the lower the intensity of the formation of scale.

Crouching filters are nets, so their maintenance is reduced to extracting and washing under a stream of water to the desired state.

The gas burner can be clogged over time and covered with a raid from combustion products, it is usually easily cleaned with a soft brush and vacuum cleaner. If there is strong pollution, then it is easily removed.

It should be noted that Viallat equipment is one of the safest among all the others. The number of settings, parameters, checks here is significantly larger than in boilers of other brands. Boilers with displays can display state codes, diagnostics (two levels), failures and adjustment programs. Only codes of malfunctions will be interested in ordinary user, because everything else is mainly intended for service specialists.

Viland also stores the history of all errors, this makes a very convenient diagnosis and search for a boiler malfunction. At any time, you can view the last 10 errors that were on the boiler (the “Info” and “-” button is used to remove the list).

Next, consider the most common mistakes of Viallat boilers and recommendations for their elimination.

Repair of dual.Circuit boilers with your own hands Vaillat

Details: Repair of dual.Circuit boilers with your own hands Viallat from a real master for Olenord.Com.

Vaillant Atmotec Plus boiler heats the section of my friend’s Townhouse section. The situation often took place in which, filling the bath at a certain moment, the boiler goes into the error, respectively, ceases to warm the water. The error code itself did not observe, according to the owner. A crossed out tap on the display, restored the work of the boiler restart.

Given the age of the boiler for more than seven years, which was allegedly washed, they unequivocally decided that it was necessary to rinse the secondary heat exchanger of the hot water from the scale and dirt.

Then the question arose. How to wash. You can call a specialist in a service organization with a booster and special liquid or wash yourself at home. Since they had not seen each other for a long time and the last matches of the World Hockey Championship were held for the weekend, no one was decided not to call and boil the heat exchanger in citric acid. In the end, it is never too late to rinse with a booster.

They poured water from the boiler through the safety valve, removed the heat exchanger. The presence of pollution in it was visually obvious. For washing, they prepared a solution of ordinary citric acid purchased in the store. As the simplest and safe. A bag of 80 grams poured into three liters of water. Filling the heat exchanger with a solution, boiled in a conventional pan three times and washed between boiling water. There was a lot of dirt, black from one circuit, from the other. Red.Haired with a suspension of heavy particles. Only after the third boiling of the dirt became tangibly smaller, they decided to complete the procedure. They put the heat exchanger in place, filled the boiler, were glad that the water is now heating significantly faster and became much hotter. In general, the procedure was successful.

Everything would be fine, but an hour later, in the absence of the owners, a decent puddle formed under the boiler. As it turned out, the boiler began to dump the pressure through the safety valve. Due to the fact that there was no experience of solving problems on hydraulics, we decided that the boiler managed to cool during the washing, we unnecessarily torn it with cold water and, as a result, after heating the coolant, the pressure in the system went beyond.

Packed from the boiler water to the pressure value of 1.5 bar, it was at midnight, so they calmed down on this. With the onset of the next day, a decent puddle formed under the boiler again.

It was obvious that after washing the boiler began to work incorrectly. During the work there was a constant increase in pressure to the maximum value.

The pressure of the expansion tank

By symptoms, the first thing that occurred to the head is to check the pressure of the expansion tank of the boiler. How to do it. I will not describe, you can watch the video. If there is no air in it, and there is no compensation for thermal expansion. Pressure surges will be observed in the system, which lead to discharge. They poured water from the boiler, checked the pressure. The value is about 0.6 bar. Not to say that small, but just in case, they pumped up to 0.8 bar. Even when the water was dumped from the boiler, they noticed that the pressure in the boiler suddenly itself has grown from 1.2 bar to 1.5 bar in just a few minutes. At the same time, the boiler did not perform any operations at all. It became clear that there is a constant recharge of the boiler. The fuel tap is closed, but the boiler is fueled. Slowly, with an interval of 10-15 minutes, the pressure in the heating system increased by 0.1 bar.

Having studied the hydraulic scheme, it became clear that the “parasitic” recharge can occur only in two places: the fuel tap and heat exchanger, which was washed.

Replacing the secondary heat exchanger

The problem was solved as a result by installing a heat exchanger. Apparently, in the old heat exchanger there was a fistula, and the message point of two contours arose. The fistula over time was overgrown with quip and dirt, and after washing opened. I do not claim the role of an expert in the field of physico-chemical processes occurring inside the heat exchanger, but I risk assuming that over time the formed scale was the cause of local overheating inside and damage to the plate, but at the same time, the scale itself ensured the tightness of the contour.

This whole story prompted me to the following thoughts and recommendations:

  • It is advisable to flush the heat exchanger regularly. It all depends, of course, on the quality of the water of a particular region, the presence or absence of coarse cleaning filters, etc.D. Local organizations recommend washing once a year before the heating season, but I do not think this is a dogma.
  • It would not be superfluous to have a second heat exchanger, this allows you to replace at any time, t.To. With such a malfunction, the operation of the boiler as a whole is impossible, even for heating. Fair for owners of large private houses.
  • It would be correct to put back on the heat exchanger after washing (I don’t know if it is done when washing in specialized organizations, I would have done). In our case, it could be elementarily blown with your mouth, t.To. The fistula was large enough.

Checking the tightness of the heat exchanger on the boiler

You can check the tightness of the heat exchanger on the boiler by blocking the supply of cold water into the boiler and opening the hot water tap tap. If the heating system and the DOS circuit are communicated through the heat exchanger, water will flow from the tap. In our case, this did not happen-from the tap, a little digging once per minute dropped. Perhaps if this test was repeated at a pressure in the boiler more than 2 bar, then the leak would be clearly manifested. That is why, the variant of the leakage of the heat exchanger was initially excluded (as it turned out wrong).

valve, vylant, boiler, flows

Checking the tap tap Vaillant Caps Caps could also be the reason for the leakage of tap water into the heating system. If the heat exchanger clearly failed, it was clearly not possible to check the tap tap on Vaillant Atmo Plus as follows:

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