The autonomous heating system provides a comfortable environment in the premises. When it fails, the established order and comfort is disturbed. Agree, no one wants to stay in the winter with a constantly fading heating boiler. And if the gas boiler blows out with the wind, what should the owner do in such a situation?
We will help you deal with this problem - the article discusses the reasons for the fading of the boiler and methods for solving this problem. Illustrative photos and videos are provided.
The content of the article:
- Reasons for the extinction of the burner flame
-
Ways to solve the problem of boiler attenuation
- # 1 - fighting bad traction
- No. 2 - installation of a weather vane-deflector
- No. 3 - gradual heating of the boiler
- Solving the problem for different types of boilers
- Conclusions and useful video on the topic
Reasons for the extinction of the burner flame
The damping of the boiler from the wind is not such a rare problem. This applies less often to apartment owners - 95% of the equipment has a coaxial air duct. But homeowners are often faced with burner damping. Let's try to find the source of the problem and restore the device to work.
So, the boiler can go out due to inconsistencies in the technical parameters of the chimney and operating conditions. Another factor is wrong arrangement of ventilation. It is reasonable to entrust the elimination of such malfunctions to specialists.
In most cases, the burner goes out due to the design features of the entire heating system or under the direct influence of third-party interference
A situation often arises when the air mass acting from the outside builds up pressure and the check valve is triggered. A strong gust of wind returns it to the closed position, the gas supply to the furnace stops. In this case, reconstruction of the chimney is needed.
Attenuation of the boiler can be associated with:
- Breakage flame sensor. A worn out thermocouple or ionization electrode knocks out the automation after the slightest breath of wind. The solution is to replace the defective part.
- Weak burning of the wick due to the fact that it is clogged or insufficient pressure at the inlet. If there is a regulator, you need to check its settings and increase the pressure. Plus clean the wick.
- Bad cravings in the chimney.
- System availability for wind - no protection. Refers to one-story buildings and upper floors of high-rise buildings. The problem is solved by installing a weather vane-deflector.
- Incorrect chimney design - when there are not enough turns. If it leaves the boiler directly into the wall, the wind enters the boiler unhindered. But no more than three turns must be done on the outlet.
- Incorrect ventilation system or lack of channels.
- Malfunctioning safety sensors — thrust sensor, limit thermostat. It is necessary to check the contacts of the protective equipment and clean them.
- Finding the chimney in the wind support zone.
Why else can a gas boiler go out in the wind? Sometimes the equipment is located in the kitchen with a balcony on the second or third floor of the building. It is enough to open the balcony door, so that a strong draft is formed abruptly, the wick begins to oscillate and dies out.
The reason for the attenuation of the burner can also be the burnout of the pipe, when air enters through the hole and interferes with the normal operation of the chimney. In this case, you need to change the chimney structure.
It is useful to inspect the external elements of the heating system for the presence ice build-up.
It is not worth knocking him down. It is necessary to shut off the gas, bring the removable parts into the room for slow thawing. After returning them to their place, warm up the device, gradually increasing the gas pressure.
Ways to solve the problem of boiler attenuation
The option of restoring the operability of gas equipment depends on the cause of extinction. Next, we will figure out what can be done in order to prevent the boiler from damping in the wind.
# 1 - fighting bad traction
Draft is an external force in the chimney, which makes the combustion products rise and go into the atmosphere, changing places with fresh air. This is due to the higher density of cold air compared to the density of warm combustion products.
In the context of the problem of boiler damping, the draft can be:
- Insufficient, which leads to the operation of the sensor and the damping of the burner.
- Excessive - formed when there is an excess of ventilation ducts, incorrect position of the chimney. In this case, the speed of the waste products of combustion increases and the boiler goes out.
- Reverse, due to which the flow of combustion products changes direction and returns to the furnace. Not only the extinction of the flame is observed, but also the gas pollution of the premises.
Sources of trouble lie in the design flaws of the chimney or current malfunctions. Particular attention should be paid to the location of the pipe - its upper part should rise at least half a meter from the extreme point of the roof.
The diameter of the duct is calculated using special formulas (SNiP 41-01-2003). Its cross-section and pipe height must correspond to the capacity of the boiler equipment.
It is necessary to check the tightness of the connections, the serviceability of the fan, the presence of foreign objects in the pipe, debris, a large layer of carbon deposits and eliminate the defects. Among the current malfunctions is damage to the thermal insulation - the chimney must be warm.
No. 2 - installation of a weather vane-deflector
The current method for the attenuation of the boiler from the wind is installation on the chimney deflector. The aerodynamic device can be of different configurations.
In a conventional weather vane, the air flows are directed to the outside. Their interaction with the surface of the deflector creates a rarefied atmosphere, which increases thrust.
The phenomenon when air meets an obstacle, bends around it and creates a rarefaction zone is called the Bernoulli effect. More air speed - less static pressure
A simple weather vane increases the efficiency of any pipe by 15-20%. But he is not able to completely solve the problem of the extinction of the boiler. It is more profitable to use a device with a complex configuration.
Suitable designs:
- Grigorovich;
- Volpert;
- spherical, rotating;
- other.
V deflector Grigorovich all elements are subject to the laws of aerodynamics. The device is two-cone. The interaction of the forward and reverse cones distributes the passing air flows so that a zone of reduced pressure is formed around the pipe.
After installing the Grigorovich deflector, the thrust increases several times. This is due to the temperature difference between cold and hot streams.
Volpert deflector is a construction of two "glasses" - cylindrical and with a downward expansion. The top one with a lid is somewhat on the bottom one.
The design of this deflector is designed so that, in any direction of the wind, gases are pushed (sucked out) to the surface through the annular holes
There is also a joint device - deflector Volpert-Grigorovich. It features an inverted cone, a curved diffuser surface and an umbrella cover. The design shows good efficiency in solving the problem of boiler extinction and increases its efficiency by 25%.
The requirements for the deflector on the chimney of a gas boiler and installation instructions we have given in next article.
Any deflector requires regular maintenance - cleaning and lubrication, otherwise the opposite effect will occur. It is not recommended to install canopies-umbrellas - they violate safety regulations.
No. 3 - gradual heating of the boiler
If the heating system has been turned off for a long time, the wind can blow out the gas boiler due to insufficiently heated chimney. This situation is typical for country houses, when after the first start of the equipment, the burner quickly goes out.
The explanation of the phenomenon is simple: it is difficult for the waste products of combustion to climb up the cold pipe, and gusts of wind interfere with the heating of the channel.
You need to act like this: start the system at low speeds and gradually increase the power of the device to optimal performance. This will create natural conditions for the release of hot combustion products.
Solving the problem for different types of boilers
Equipment with a closed burner is called turbocharged and it needs electricity to function. In order to prevent damage to the control board in case of power failures, when installing the boilers, install Voltage regulator.
Boiler units with an open combustion chamber are called atmospheric. They are independent of the power supply system.
So, atmospheric and turbocharged boilers have a different device. Therefore, the principles of solving the problem with their attenuation will also be different.
Atmospheric boilers are non-volatile. But in a turbocharged burner, the cause of the burner damping may be a malfunction in the electronic part, and not just blowing wind
V atmospheric boilers natural traction. The device does not receive the set air volume if there is insufficient or insufficient air flow. It is necessary to artificially increase the amount of taken oxygen by arranging additional supply ventilation and a conventional opening in the door with a grill.
You can also use one of the following methods:
- reducing the diameter of the chimney by installing an inner pipe, which will accelerate heating and eliminate the effect of excessive dilution of gas with air;
- deflector installation;
- increase in the length of the chimney.
Turbocharged boilers more stable in operation, but provided they are installed on the leeward side.
In the opposite situation, installation of a deflector or reconstruction of a chimney will help by creating a system in it "Rupture of thrust" - construction of a zone inside the chimney that prevents the reverse movement of combustion products.
Conclusions and useful video on the topic
Installation of a baffle from the wind.
How to make a protective cover for a parapet boiler.
What is useful to know before installing and operating a weather vane-deflector.
The efficiency of the heating system depends on competent thermal calculations when designing a house, correct operation and regular maintenance. Having considered the reasons why a gas floor-standing or wall-mounted boiler blows in the wind, we can summarize: the problem is eliminated by replacing (repairing) individual parts, checking or re-equipping the entire structure chimney.
Measures to restore the equipment operability should be entrusted to specialists. If you do this yourself, you must definitely consult with experienced craftsmen..
Would you like to share your experience in solving the problem of boiler attenuation in the wind? Write your recommendations in the comment block.
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