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 with you, but also with all neighbors..
In addition, check and eliminate the possibility of gas leaks – using a soap solution, which is applied with a sponge or spray bottle to the joints of pipes and parts. 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 a back draft, the valve is triggered, the flame in the boiler goes out automatically.
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 consider 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 enhances 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 agreement with the relevant service. Therefore, before installing a deflector or 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 out, 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 at temperatures 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 the draft, the boiler automation is triggered, it stops operation. 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. Shut off the gas supply before removing and cleaning the pipe! 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 disconnection of the device and eliminate it.
We state: it is guaranteed to avoid the problem of blowing out a gas boiler only by a competent selection and installation of a chimney, as well as its regular check.