The signal that the gas boiler should be cleaned:

　　1. The wall-hung boiler has been used continuously for more than two heating seasons.

　　2. It is obvious that the gas consumption of the wall-hung boiler is larger than before.

　　3. The heating time of the wall-hung boiler increases, and the output of domestic hot water decreases.

　　4. The operating sound of the wall-hung boiler increases, and there will be abnormal noises from time to time.

　　The basic maintenance of the wall-hung boiler can be done by everyone at home, just pay attention to the following points:

　　1 When using the summer mode of the wall-hung boiler in the non-heating season, keep the wall-hung boiler connected to electricity and gas to ensure the normal supply of domestic hot water in the summer mode.

　　2. Keep the pipes filled with water.

　　Pay attention to keep the water pipe full of water and ensure that the water pressure is in a normal state (1-1.5bar).

　　3. The water temperature should not be set too high.

　　When using the wall-hung boiler in spring and summer, the temperature of the hot water of the wall-hung boiler should not be set too high. Because the water temperature is too high, beyond the high temperature protection, it will also cause certain damage to the wall-hung boiler. If the water temperature is too high for a long time, it is easy to form scale, which affects the service life of the wall-hung boiler.

　　4. The hot water faucet should not be switched on and off frequently.

　　During the bathing process, because every time the hot water faucet is turned on and off, the wall-hung boiler has to be restarted. A large amount of cold water is wasted, and when the wall-hung boiler is heating hot water, it burns with a big fire before reaching the set temperature. If the faucet is turned on and off frequently, it will increase the consumption of gas.

　　5. Check for water leakage.

　　After the heating is stopped, the temperature of the wall-hung boiler facility will decrease. Due to the phenomenon of thermal expansion and cold contraction, it may cause water leakage at the joints and valves of the pipeline. Therefore, it is recommended to carefully check whether there is water leakage at the interface after the heating is turned off. If there is a slight water leakage, you can tie a towel. If the water leakage is serious, you should contact a professional organization for repair as soon as possible. In addition, pay attention to check the chimney to avoid secondary damage caused by rainwater entering the inside of the boiler through the chimney.

　　6. Full water maintenance.

　　It is forbidden to empty the water in the pipe network system of the wall-hung boiler. After venting, a large amount of air and oxygen enter the pipe network system and boiler, which will cause corrosion of the waterway components and pipes of the wall-hung boiler.

　　7. Keep it tidy.

　　Use a soft cloth to wipe the body of the wall-hung boiler to keep the body clean and tidy.

　　The core issues of the wall-hung boiler are heat exchange efficiency and service life. The biggest factor affecting these two aspects is the accumulation of impurities such as scale, so the regular cleaning of the wall-hung boiler is particularly important.

　　1. Clean with clean water.

　　After connecting the cleaning equipment to the wall-hung boiler, clean it with clean water for a period of time, check the system status, check whether there is any leakage, and remove impurities such as floating rust and scale.

　　2. Add the cleaning agent to the circulating water of the cleaning tank in proportion, and after circulating for a period of time, separate the scale from the cleaning parts, and at the same time carry out anti-corrosion treatment on the surface of the objects without scale to prevent the cleaning agent from corroding the cleaning parts.

　　3. Cycle cleaning.

　　Add the configured descaling cleaning agent to the circulating water of the cleaning tank in proportion to clean and remove the scale. Determine the cleaning cycle time and the amount of chemicals added according to the amount of scale. After confirming that all the scales are cleaned, proceed to the next cleaning procedure.

　　4. Flush out any residual liquid in the system.