What will happen if a solid fuel boiler boils

What to do boiler boiled. What to do if batteries are habitable and boiler heating boys

The water in the heating boiler can boil out of the fact that the heating rate in the boiler exceeds the rate of heat return in the heating system of the house. This can happen for several reasons:

Log Boiler Central Heating System. Case Study Sussex

  • Insufficient speed of circulation of the coolant or its absence;
  • Insufficient amount of coolant (water) in the system. Most often happens in open systems with an expansion tank;
  • Excess of the capacity of the heating boiler compared to the total power (heat transfer) of the heating radiators of the house, taking into account losses. In the absence of a control system (power) of the boiler;
  • Incorrect installation of the heating system.

Now we will consider these reasons in more detail.

With insufficient circulation rate

The heated water does not have time to give the heat obtained in the cauldron to the system and can heat up in the boiler to a boil temperature. This can happen to heating systems with natural circulation of the coolant, if the correct slopes of the installation of pipes are not observed or less often. If their diameter is insufficient. With a forced circulation system, this can happen if the circulation pump is not selected, faulty, does not work or no electric current supply to it.

Also, water in the boiler can boil if in the system for some reason there is not enough water (coolant)

And the air fell into it. If the heating system with natural circulation and with an ordinary expansion tank sometimes happens and in this case you just need to add water. Depending on the design of the heating system, sometimes it is required to struck from the system or some part of its air (in the absence of an automatic valve).

To increase the circulation of water in the heating system, it is necessary to redo the heating system or, it is best to install a circulation pump. Even with the not.So.Correct bias of the pipes or in their absence, the circulation pump will provide the necessary circulation.

Water in the heating system can also boil if the installed boiler in power is much higher than the heat transfer power of the entire system

, especially in the absence or malfunction of the automatic control system (traction) of air supply. In this case, it is necessary to install a semi- or automatic traction control system, replace the boiler (if it is homemade without a traction control system) or increase the number or power of radiators. As an option, you can install indirect in the system

Good afternoon! Yesterday, they installed 2 additional radiator (white aluminum) in a private house in a private house, installed, opened valves, launched water and, as the radiator is filled with water, as usual, air was pulled through the discharge hole. After the work done, the pressure in the system decreased and, as usual, water was added from the central water supply system (our house is connected to the water supply system, which passes near the house and we add water to the heating system from the central water supply system, everything is connected so that the valve opened. Water has gone). After all this, the boiler began to heat up and boil very quickly (in our house in the heating system there are 3 circuits, along which heating the first and second floors of the house is on, in each circuit it was put along the pump (3 pcs.) and one pump is put in the return. So, all the pumps work, the air in all radiators is stratified, and the boiler continues to heat up very quickly, literally from one firewood thrown. I beg you to help, what you can, I am already tormented for 2 days, I don’t understand what the reason is.

Unfortunately, there is practically without knowing anything about the heating system of your home, we cannot help specific advice. It’s like in medicine: to make a diagnosis, the doctor must get the results of the tests and examine the patient. But we are not even in the know “anatomy”, you did not attach the scheme to the question. You need to know not only the overall arrangement of heating devices, but also the structure of the boiler room, the location of the fragrances, etc.D. But, even knowing these parameters, to try to determine the nature of the problem in absentia. To a large extent, fortune.Telling on coffee grounds. There may be a lot of local causes of incorrect operation of the system, we will outline the correct, in our opinion, algorithm for their search and elimination:

Manual fabric (Maevsky crane) should be installed on each radiator

The cause of poor circulation may be the general pollution of the system, the batteries are primarily clogged. The heating device can be removed and blowing with compressed air or washed with a powerful stream of water.

happen, solid, fuel, boiler

The diagram shows that the faints automatic on combs (5, 11) and the crane of Maevsky (13) are placed on all heating devices without exception. This has been done for a reason, but to eliminate situations like your

The massive use of boiler rooms operating on solid fuel puts special requirements to the owners of private houses. Despite the technological progress, which allowed us to bring modern solid.Fuel heating devices to perfection, the work of such equipment carries a certain danger. Malfunctions in work, violations of the operating conditions of heating equipment may become the reasons for the failure of the equipment in the midst of the heating season. In the worst case, the occurrence of freelance situations with a working unit can result in serious injuries for the inhabitants of the house, damage to residential buildings.

In this aspect, one of the most important conditions of safe operation will be the protection of a solid fuel boiler from overheating. Accurate compliance with the safety rules for the operation of heating equipment, the availability of capable automation and control devices will allow you to provide the necessary protection against unforeseen situations.

Consider in more detail what the protection of boiler equipment is based from overheating. What can be the boiling of the coolant in the heated circuit and what are the consequences of such an emergency.

Why boils and explodes a solid fuel boiler?

There is one reason. A large inertia of the boiler. With a sharp end to the selection of heat, the boiler cannot go quickly. The coolant in the boiler boils, and the boiler torn with increased pressure.

Modern heating systems. Energy.Dependent. They have a circulation pump, or even several pumps.

The circulation pump provides the circulation of the coolant in the heating system and the boiler. If the circulation stops, then a solid fuel boiler will boil.

For this reason, many people like a self.Stroke or gravitational heating system. There are no elements in it that need electricity. In a self.Gathering system, this is the only advantage. I can’t even imagine what needs to be done so that the boiler boils with such a heating system.

Safe operation of the boiler

Important! If you see that the pressure in the system is approaching a critical value, stop supplying fuel to the tank. If possible, carefully remove burning fuel from the furnace. Do not fill the fire with water!

The heating system with a solid fuel boiler requires constant control from the moment of choice and throughout the entire time of use. Another thing is that attention at each of the stages must be emphasized at different points.

A simple view of a problem.

Extensor tank plays an important role in the cooling system. Its main function is to damp the pressure fluctuations in pipelines that occur due to an increase (decrease) the volume of antifreeze during heating (cooling). Due to the presence of such a container, mechanical loads on the elements of the system are reduced, hydrouches and the appearance of air plugs are prevented.

In fact, the tank replenishes the lack of fluid in the highways when cooling and serves to take excess when heated. Structurally performed in the form of plastic sealed capacity.

A mandatory detail of the design is a safety valve for resetting to the atmosphere of excess pressure.

When antifreeze is heated, it expands, filling the free space of the tank, the intensity of evaporation increases. This leads to an increase in pressure in volume. Pressure growth above the threshold value causes the operation of the mounted valve.

The only situation when the antifreeze is thrown out of the expansion tank. The valve does not cope with the performance of the assigned functions.

Principle of operation

Schematically the heating contour of the OS can be represented in the form of a long vertical ring. One side of the ring. With hot water (feed bump from the boiler to the Republic of Belarus), the other side is with cold (riser with a circulation from radiators). The density of hot coolant is less than cold. From heating the water expands.

Therefore, the weight of the water and the pressure of the water column in the cold part of the circuit will be higher than the weight of the water and the pressure of the pillar in the hot branch.

According to the law of communicating vessels, the liquid will strive for balancing pressure. To the transition from the cold branch to hot.

Since the circuit is such a closed ring, a circulation or a gravity of the coolant occurs or gravy.

  • The feed riser is insulated as much as possible over the entire height.
  • The boiler is as low as the last radiator as possible.
  • There is a container in the circuit for the excess volume of the heated coolant. An expansion tank (to provide low density and low pressure of the water column in a heated branch).

With natural circulation

The coolant during natural circulation moves under the influence of circulation pressure PN (in mm. Water pillar):

  • H. The height difference between the boiler and the last radiator, m;
  • Phol. Water density in a cold riser of the return, kg/m³;
  • PGOR. Water density in a hot feed riser, kg/m³

During circulation along the contour, the coolant spends part of the pressure on overcoming the hydraulic resistance of pipes, radiators, shut.Off valves. Therefore, when designing OS, select materials with low hydraulic resistance so that they do not exceed the calculated pressure PN in total (do not lock the system).

Important! In the coolant of the AP there is air, which is mixed in an expansion tank. To remove air, the pipe is made with a slope of at least 3-5 mm per p

With circulation from the pump

To increase natural pressure in the OS contour include a circulation pump.

There are two places for insert inserts to the existing OS:

  • On the return pipe in front of the boiler. The expansion tank is reconnected to the return pipe in front of the pump (in the absorption zone).
  • On the upper feed pipe immediately after the connection point of the expansion tank.

Reference! The place of insert inserts will be equipped with a bypass with a petal check valve.


One.Pipe system with natural circulation is made only with the upper distribution of the coolant.

All radiators in the riser of a single.Pipe OS are connected sequentially. The output of one battery is connected to the entrance of the other.

  • A small number of pipes.
  • Simplicity of installation.
  • System’s unbalanced. The upper batteries are hot, the lower. Cold. To align the temperature regime, the lower radiators are installed with a large number of sections.
  • The inability to carry out thermoregulation due to the high resistance of the regulatory cranes.

Heat Pumps Explained. How Heat Pumps Work HVAC


The two.Pipe system is characterized by the fact that two pipes are suitable for each radiator: one delivers hot coolant from the feed riser, the other takes the chilled water into the riser of the return.

  • Balance of all batteries in temperature.
  • The radiator can be replaced without disconnecting the boiler.
  • Increased pipes consumption.
  • The complexity of installation.

With the upper feed

Hot water is supplied from the boiler up the vertical riser to the attic or under the roof, from where it is divorced along the sunbeds to vertical radiator branches (both one.Pipe and two.Pipe). Having passed the radiators, the chilled coolant is collected in the return and enters the boiler.

With the lower presentation

With a lower supply, heated coolant enters the radiator branches from the bottom up. Pipelines of feed and return are laid next to each other at the floor level.

Attention! Such a system does not clutter up the room with an abundance of pipes, but requires the installation of Maevsky cranes on each radiator to produce air. Advantages:

  • Simplicity of installation.
  • Durability.
  • Electricity is not required for circulation.
  • Self.Regulatory system. The speed of the coolant depends on the temperature in the rooms.
  • It is not suitable for all rooms. You need an attic where an expansion tank is placed and horizontal pipes are laid.
  • It requires the lowest possible boiler as possible. In the pit or basement.
  • Slow heating when starting.
  • An unpresentable appearance (large diameter iron pipes, cast.Iron radiators).
  • Small radius of action. No more than 30 meters from the boiler.
  • The inability to use antifreeze due to the poisonous of evaporated vapors.
happen, solid, fuel, boiler

Causes of boiling of a solid fuel boiler

Connected heating to a solid fuel boiler. He boils: it costs 85 on the feed, and on the return 45. A circulation pump is installed. Please help me figure it out.

A solid fuel boiler, as well as any other, can boil only one reason-due to the fact that the working fluid does not have time to cool. Both fueling or insufficient speed of the coolant, and error when choosing equipment leads to such a trouble. In the first case, boiling water most often occurs due to errors when calculating and installing the heating system:

  • Underestimated section of pipes;
  • The presence of areas with excessively high hydraulic losses;
  • The slopes of the gravitational heating system are made in violation of the requirements of hydrodynamics.

As for the incorrect selection of units or regulatory reinforcement, here the coolant boiling occurs due to the too high power of the boiler or that the characteristics of the circulation pump do not meet the requirements of the system. The latter, by the way, refers to both high and underestimated parameters. So, if the pressure is less than the calculated, then normal fluid circulation will be difficult due to the fact that the pump will not be able to “push” the coolant through the highways with proper speed. If you installed a circulation pump with excessively high performance, then a phenomenon as cavitation may occur. This process is accompanied by the appearance of many air bubbles, and, as a result, the system of configuing the system.

In order to correct the situation, first of all, it is necessary to remove the air from the heating system. It is good if the radiators are installed automatic air vents, and the expansion tank is installed at the upper point of the heating circuit. Be sure to check whether the circulation pump is installed correctly or is its installation performed in the counter. After the system is executed, the malfunctions should disappear. If they appear again, be sure to analyze whether the calculation and installation is correctly performed and eliminate the detected shortcomings.

Thanks to versatile hobbies, I write on different topics, but the most beloved. Equipment, technology and construction. Perhaps because I know many nuances in these areas not only theoretically, due to study at a technical university and graduate school, but also from the practical side, since I try to do everything with my own hands.

Prevention and prevention measures for overheating

The measures of warning and prevention of emergency situations can be attributed to the following:

  • Set an additional circuit to cool the boiler, which works on solid fuel. In a double.Circuit boiler with an increase in the coolant, the liquid will be able to cool due to the water supply system.
  • Installation of buffer capacity. She will warn the boiler boiling, take over the excess temperature, and can also store heat for the heating circuit.
  • You need to install source of uninterrupted nutrition. If the electricity is turned off, the uninterrupted fence will automatically turn on, the energy will come from the battery, and the system will continue to work.
  • Periodically clean the ventilation system.

A solid fuel boiler smokes, what to do?

Sometimes, the owners of the solid fuel boilers are faced. Simply. Smoke is falling from the boiler. What in this case to do and not everyone knows what to do. Find the reasons why the boiler on solid fuel will smoke this article. We will tell you what to do, what things to pay attention to and what are the reasons for this phenomenon.

Clicks boiler: causes and methods of elimination

The main reasons why the coal boiler is puffed:

  • Poor thermal insulation of the chimney, clogging of the chimney.
  • Unfinished chimney.
  • Insufficient pipe height above the roof, the chimney’s reckoning
  • Weather.
  • Lack of tightness of the chimney, horizontal areas of more than 1 meter.
  • Shiber’s position.
  • Bad ventilation.

If your solid fuel boiler began to smoke strongly, then it’s time to put things in order in the chimney. Clean and check the rest of the factors worsening.

Bad thrust is a consequence of the clogging of the chimney due to the resulting condensation. Condensate in the pipe occurs due to a large temperature difference, which is why the chimney needs thermal insulation. The temperature of the smoke in the pipe should not be below the dew point. 70 degrees.

The boiler boiled what to do?

The modern way to insulate a chimney. This is put in the attic and Street Pipe-Sandwich. The design of the sandwich pipe already provides a layer of insulation laid between the inner and outer pipe-fucker.

Sandwich pipes do not allow smoke to cool to too low temperatures, thereby preventing the abundant appearance of condensate. Condensate accelerates the process of soot sticking on the walls of the chimney, which negatively affects the thrust. A clogged chimney is the answer to the question “Why is smoke from the door of the boiler”.

Regular cleaning of the chimney and the prevention of the formation of a large amount of soot with the help of special tools will become the key to good traction and lack of smoke in the house. You can use chemistry for cleaning, as well as periodically remove soot with a brush.

Less so soot will form, if you do not use wet fuel, tarry species of firewood and as mentioned above, insulate the smoke channel.

Another common reason why a solid fuel boiler smokes at the beginning of the kindergarten is an unheated pipe.

Often this phenomenon is observed in colder weather, with low atmospheric pressure. When the boiler does not work, the air in the chimney is cold. Since, cold air is heavier than warm, it is harder to push it out to smoke. The so.Called air traffic jam is formed. There are flows of warm smoke and cold air. As a result, the smoke is released into the room.

The way out will be the gradual heating of the chimney. To do this, the first ignition must be produced with chips, paper, old newspapers or something like that. A small stream of warm air, like a boumor easily “breaks” a cold pillar. After that, you can make the main voluminous laying of firewood.

Sometimes smoke from the boiler is falling around when the height of the chimney is below the roof skate, that is, insufficient. Also, you can not make a smokeshift diameter less than the boiler manufacturer recommended for each specific power. These factors also create risk and the possibility of smoke.

If you smoke a boiler with solid fuel, you need to check the height and increase it if necessary.

If it happened that the diameter of the pipes is smaller than necessary at a sufficient height, then the exit will be adding another meter or two to height. This stabilizes traction.

The best solution for good traction will be the minimum length of the horizontal sections of the pipe smooth transitions of chimney pipes at an angle of 45 are preferable than 90.

What to do if the boiler is smokes subject to all the installation standards of the chimney? The weather is bad to blame. Sharp gusts of winds can worsen traction.

To get out of the situation, a cone is installed as the end of the pipe that protects from the side wind. Such a detail as a weather vane will be able to strengthen the traction.

Why still can smoke and smoke a heating boiler? Another reason. Low.Quality seams of chimney pipes without proper tightness. Smoke can also seep through these cracks, interfering with normal thrust. In this case, only the complete replacement of the smoke will help.

A solid fuel boiler boiled! Effects

Sometimes smoke in the room appears if the degree of opening of the Shiber appears. Closed damper at the stage. A significant obstacle to the release of smoke, as expected, respectively, the smoke in the room appears.

Smoke goes into the room even if in the room where a solid fuel boiler is located insufficient air flow.

After reading this article, each owner of the heating system on wood will know what to do when the boiler smokes. Having taken the above measures, observing safety precautions and the rules for the operation of a solid fuel boiler, there should be no problems with traction.

| Denial of responsibility | Contacts |RSS