Why blows out a gas boiler in a private house. If the gas boiler blows out with the wind - what to do and video

Gas boiler blows in the wind what to do

Often the reason for stopping the operation of a gas heating boiler is blowing wind. Turning it off in winter is a very unpleasant surprise for the owners. This can lead not only to a sharp decrease in the temperature inside the house, but also damage to the entire heating system. Let's deal with the problem.

If your gas boiler suddenly turns off, do not panic and, for the beginning, exclude such a possible reason as a sharp drop in gas pressure in the pipeline. To do this, you can simply turn on the gas stove and look at the flame, its dimensions, check how quickly the water will boil. You will immediately notice the low gas pressure on the hob. In this case, your boiler is definitely not to blame, call the gas workers and find out the causes of the problem. Most likely, it is not only you, but all neighbors.

In addition, check and exclude the possibility of gas leakage - using a soap solution, which is applied with a sponge or a spray bottle to the joints of pipes and parts. There is no smell or bubbles, so it’s not a leak.

However, the reason for the shutdown of the gas boiler is often obvious - there is a hurricane wind outside, which simply whistles in the pipes. Strong gusts of wind entering the chimney cause back draft, the valve is triggered, and the flame in the boiler is automatically extinguished.

You should think about preventing the risk of blowing out the boiler even at the stage of installing the chimney. It is highly advisable to take into account the wind rose in your area. A chimney incorrectly positioned relative to the wind pressure zone significantly increases the risk of blowing out the boiler burner. Incorrect chimney configuration can also cause this problem.

A deflector installed on the head of the chimney copes well with the problem of blowing out the boiler. This is a fairly simple design that increases the draft in the chimney, protects it from precipitation and blowing out. Be sure to think about installing a deflector or immediately purchase a design with such a device.

Important! Actions with gas equipment require coordination with the relevant service. Therefore, before installing a deflector or wind vane, consult with gas workers.

The cause of the gas boiler blowing out can also be the burning out of the metal chimney pipe. As a result of burning, a hole is formed where the air flow enters - problems with the chimney appear. Only replacing the pipe will help to cope with the situation. In the case of coaxial chimneys, there is no risk of burning out, because hot gas from the boiler goes through the inner pipe, being cooled by the oncoming cold air flow.

Two more possible reasons for blowing out a gas boiler:

Ice build-up on the chimney. This often happens with coaxial structures in a frost of -10 ..- 15 ° C. Hot steam comes out of the chimney, gradually cools down, turns into water droplets, condensate, which freezes, forming icicles and a thick layer of ice. This leads to a disruption of traction, the boiler's automation is triggered, it stops work. If such a problem arises, do not rush to shoot down the ice build-up - you can damage the chimney itself. It is best to remove the head, the upper part of the pipe and bring it into a warm room so that the ice melts naturally. Before removing and cleaning the pipe, the gas supply must be shut off! Additional insulation of the chimney helps to avoid the appearance of ice;

Poor ventilation in the boiler room can lead to problems in the operation of the atmospheric boiler. Arrangement of forced ventilation in the room or openings with a fine mesh in the lower part of the boiler room door will help.

They help to cope with the blowing of the boiler by manipulating the pipe - the diameter of its outlet can be reduced or increased in length. A too large chimney opening can be reduced by installing an additional inner pipe. Remember that the vertical chimney must be 50 cm higher than the roof ridge.

At the same time, too long a chimney can cause excessive, strong draft, which will literally tear off the flame from the boiler burner.

We strongly advise you to call specialists in case of problems in the operation of the gas boiler! Only they will be able to accurately determine the reason for the shutdown of the device and eliminate it.

Creation of a "thrust break" system

Another way save the burner in the boiler from damping

- this is to build a zone in the pipe that will provide
let
the air masses go
in the opposite direction
.

One of the simplest options to ensure thrust rupture is frustum

which is set in a gap in
chimney
.

Put the device in one

direction with hot air.

The essence of this method in isolating air flows

, their vortices and, as a result, does not affect the final traction force in any way.

Important:

before proceeding with the installation, it is necessary to obtain expert advice. An illiterate thrust break can lead to an accident or the formation of a large amount of carbon monoxide.

Installing a specially designed deflector

To achieve the maximum result in solving the problem, what to do if the boiler goes out in the wind, allows a deflector of a special design - an aerodynamic device installed on the chimney.

In a simple deflector, the main function is performed by the outer part, which is affected by the air flow. At the point of contact of the air flow with the surface, a rarefaction zone is created, which increases the draft in the chimney duct. As a result of using a simple deflector, thrust can be increased by 15-20 percent. Consequently, devices with a more complex design will be much more effective.

Complex structures are installed in the case when the use of a conventional deflector does not help to solve the problem of blowing out the boiler by gusts of wind. Of the large number of deflectors of complex design, several types are distinguished, which are most often found on the consumer market:

• Deflector "Smoke tooth".
• Deflector Grigorovich.
• Deflector "Voller"
• Deflectors are spherical and rotating.

The leader among the listed options is the Grigorovich deflector, so a little attention can be paid to its device.

This device has a special design, in which each contour and element is directly related to aerodynamics. If a simple deflector installed on a pipe of a private house is made in the shape of an umbrella, then the Grigorovich deflector is distinguished by the presence of a forward and reverse cone. Due to their interaction, the necessary movement of air flows is created, as a result of which a zone of reduced pressure is created around the chimney. Different temperatures of hot and cold air streams multiply the draft in the chimney and prevents the penetration of air from the outside into the chimney.

Deflectors, which have a complex design, make strong gusts of wind work to increase the draft in the chimney. In any case, the air masses fall under the lower cone of the deflector and suck in the flow coming from the boiler into the chimney duct.

The correct positioning and arrangement of the chimney in combination with a deflector of a complex design allows you to solve the problem of backdraft. Due to this, gusts of wind of any strength do not blow out the flame of the boiler burner, but only increase the draft in the chimney, allowing the equipment to work more efficiently.

Particular attention should be paid to situations when the gas boiler goes out in the wind, and starting the heating system does not give a positive result. In this case, the reason is an insufficiently heated chimney.

Country houses and cottages are rarely visited, so the heating system does not function for a long time. As a result, the first start-up of the heating boiler does not lead to anything, the burner flame extinguishes after a short period of time. Many owners are wondering what is the reason for this behavior of gas heating equipment. The fact is that the waste products of combustion with great difficulty rise up the cold chimney, and a gust of wind of any intensity does not allow the channel to warm up.

To solve this type of problem, it is necessary to turn on the boiler at minimum power and warm up the chimney. In this case, the power of the device gradually increases to certain values. As a result, the hot stream with the products of fuel combustion rises naturally.

Of great importance in creating an effective heating system in a private house are competently performed calculations when drawing up a project

However, the ventilation system is equally important in this case. Correctly chosen design and high-quality installation of ventilation will ensure the smooth operation of heating equipment

Saving on exhaust and ventilation when deciding what to do to prevent the boiler from blowing out can give a negative result during operation

Therefore, special attention should be paid to the ventilation system when planning the house, otherwise the aesthetic appearance may turn into discomfort in the winter. There will be a need to re-equip the chimney channel and climb to the roof in any frost

https://youtube.com/watch?v=QFqyaaim-HE

If a turbocharged boiler goes out?

Problems with the attenuation of turbocharged gas boilers rarely appear - they have a small pipe, and the combustion products are forced out using a fan. However, they also have malfunctions, which are warned by the traction sensor.

Basically, the reasons for the rapid decay in turbocharged models are associated with:

• improper installation of the chimney;
• insufficient ventilation of the room where the boiler is located;
• burning out the pipe.

In the first case, you will have to call a specialist who will reinstall the coaxial chimney. The second option implies the need to establish a ventilation system in the room.

When the pipe burns out, air masses enter the hole and blow out the wick in the gas boiler. The appearance of extra holes may be indicated by hum and noise in the chimney. In this case, the pipe must be replaced.

Deflector manufacturing

The simplest version of a deflector such as a Volpert-Grigorovich device is quite simple to make with your own hands.

Required tools and materials

1. Marker or felt-tip pen.
2. Ruler.
3. Iron scissors.
4. Mallet.
5. Wooden bar for the stand.
6. Riveting device.
7. Drill, drill bits for metal (or - self-tapping screws).
8. Galvanized iron sheet 0.3–0.5 mm thick (aluminum sheet or thin stainless steel is suitable).
9. Metal parts that are available: corner, pins, thick wire, and the like.

Calculation of dimensions and scheme

Since the quality of the deflector's work depends on the accuracy of manufacturing, drawing up the correct drawing is the most important stage in the entire process. The dimensions were verified by scientists in a wind tunnel, and they must be followed.The parameter from which you need to build on is the diameter of the chimney channel D.

The dimensions of all parts of the deflector are set in proportion to its diameter

Table: dimensions of the deflector parts in relation to its diameter

Instructions for making a deflector with your own hands

1. We transfer the drawn details to cardboard and make a cardboard layout. We check the correspondence of the parts to each other.
2. We open the layout back. We outline this cardboard pattern laid on a galvanized sheet with a marker.
3. We cut out all the details with scissors on the iron.
4. We roll up the casing and drill holes in its edges.
5. We fasten the casing with rivets (or do not drill and do not fasten, but use drill-point self-tapping screws).
6. In the same way, we fasten the lower and upper cone plates in turn.
7. The top plate is larger, so we cut 6 feet in the edge to attach it to the bottom plate.
8. We attach studs to the bottom plate for connection with the casing.
9. We attach an umbrella to the casing with them.
10. To strengthen the finished deflector on the chimney, it is better to separate the top of the pipe and connect it to the deflector on the ground. The strength of this connection is extremely important. The wind load at altitude will be heavy and may interfere.

The deflector may not turn out to be very beautiful, but you will immediately feel its usefulness: the draft will increase by a quarter, the roof will be protected from sparks. The pipe with it can be one and a half to two meters lower.

Video: self-manufacturing of the TsAGI deflector

You will immediately feel the benefits when installing any traction amplifier. But a self-made deflector will also create a weighty reason to make you proud of yourself.

Chimney reconstruction is one of the solutions to the problem

The first sign of constant flame extinction is an incorrect chimney design. There is no point in looking for other reasons why a gas floor boiler blows out in the wind, with such equipment. Gas supply is carried out under constant pressure, there are almost no significant differences. Any equipment malfunctions are unlikely, since modern boilers are reliable and simple in design. For example, the Conord boiler is known for its reliability and performance.

As for the chimney, here the answer to the question of why the boiler blows out in a private house is the following:

The ventilation duct of the heater is covered with an ice crust. As a result, the air circulation inside the chimney is disrupted and the gas boiler does not receive enough oxygen. In addition, water vapor enters the chimney channel, which is cooled from the ice layer and forms condensate. In turn, water droplets freeze on the walls of the chimney and the ice crust grows. The insulation of the chimney helps to solve the problem of what to do to prevent the gas boiler from blowing out. In this case, the resulting condensation will flow down the walls. Back draft due to insufficient chimney height. An increasing or changing direction of the wind creates a strong air flow that enters the chimney duct and reaches the fuel combustion chamber. As a result, the flame in the burner is extinguished.

This situation is considered more dangerous, so it is important to know what to do when the boiler blows out in strong winds. The reverse movement of warm air along the way captures the combustion products, therefore, they enter the boiler and pollute the combustion chamber

The ingress of harmful gases into the dwelling is not excluded.

Reason - reverse thrust

This problem occurs when the outside wind increases or changes direction.Air enters the chimney and blows out the flame in the boiler. In some cases, this is due to the low pipe height. This phenomenon is quite dangerous if the boiler is operated with poor automation. Fear should be that the combustion products will enter the house, blown by the wind, instead of being thrown out into the street. If the problem arose due to the small size of the pipe, then the master must increase it. Its height should be more than 50 centimeters in relation to the ridge of the roof.