Can the wall-hung boiler fire extinguishing gas meter still be used? Why?

Gas-fired wall-hung boiler is a kind of household appliance which uses gas as fuel and can provide users with heating and domestic hot water. However, a careful friend found that the gas meter was still working after the running wall-hung boiler was turned off. What's going on here? Let's find out. What are the characteristics of gas wall-hung boiler when it works? The first feature is that the gas-fired wall-hung boiler consumes gas when it works normally. The gas-fired wall-hung boiler consumes the heat generated by gas combustion, and there is no doubt that it consumes gas. But what I want to say is that the gas consumption of wall-hung boilers is relatively large. For example, a 18kW natural gas wall-hung boiler consumes about 2 cubic meters of natural gas per hour. The greater the power, the greater the gas consumption per hour. The second feature is that the fan and circulating water pump do not stop when the wall-hung boiler works. The wall-hung boiler can burn normally, relying on fan ventilation to provide oxygen to help burn and discharge the waste gas produced after burning. In order to provide hot water or heating normally, it is necessary to keep the circulating water pump working to make the water cycle exchange heat. These devices make a lot of noise when they work, and they will not stop running as long as they work. The third feature is that the gas supply of the wall-hung boiler is intermittent when it works. We all know that the wall-hung boiler will not burn all the time when heating. It will automatically stop gas supply when the temperature reaches the set temperature, and burn again when the temperature drops to the set temperature. So the gas supply is intermittent. What are the characteristics of gas wall-hung boiler installation? The first feature is that the gas wall-hung boiler is connected by pipes at a certain distance from the gas meter. Wall-hung boilers and gas meters are both electrical appliances. Wall-hung boilers generate heat when they work, and gas meters are precision instruments. Therefore, in order to work safely and stably, the gas industry standard requires that the wall-hung boiler must keep a distance of more than 30 cm from the gas meter. The second feature is that the gas pipes used for gas wall-hung boilers are relatively large. Compared with gas stoves and other equipment, gas wall-hung boilers consume a large amount of gas, so they need a relatively large gas pipeline. Generally, the gas pipe of wall-hung boiler is DN20, and the gas pipe of gas stove is DN 15. The first reason for the flameout of the wall-hung boiler is that according to the above, we know that the general wall-hung boiler has a certain distance from the gas meter, and the gas pipe is relatively large, indicating that the gas pipe from the gas meter to the wall-hung boiler has a certain volume. We also know that the gas consumption of the wall-hung boiler is relatively large when it works, which shows that the gas pressure of the gas pipeline is reduced to some extent due to the consumption of large load. Then when we shut down the working wall-hung boiler and cease fire for a short time, the gas pressure in the pipeline from the wall-hung boiler to the gas meter is low, and the gas will still flow into the pipeline until the pressure in the pipeline is the same as that in front of the meter. In other words, there will still be problems with the gas meter during this time. The second reason is that the fans and pumps mentioned above will make noise, which will drown out the sound of gas burning or flameout. The gas is supplied intermittently. Sometimes we think that the wall-hung boiler itself has turned off, but it is still burning. The natural gas meter can be read. This is a misjudgment of the ceasefire. Conclusion According to the above, I think the gas meter of the wall-hung boiler will still have problems in a short time after the ceasefire, and the length of the problem has a certain relationship with the distance between the wall-hung boiler and the gas meter. The farther you go, the longer it takes, but it will eventually stop. This situation exists especially in the case of small domestic pipelines and large gas consumption of gas equipment. But don't worry about gas loss, the gas is still in the pipeline, so it can be used directly next time.

In addition, remind everyone to pay attention to safety when using gas wall-hung boilers. Ventilation frequently to prevent gas leakage. I hope my answer can help you.