The problem of heating

The reason is that the water in the boiler and the whole pipeline system is not satisfactory. When heating, the water pump in the boiler room is working, the water in the pipeline flows under pressure, and the gas-water mixture enters the heating package. Under normal circumstances (atmospheric boiler heating), the heating will not be very hot, so it is necessary to exhaust, and the heating package will be hot after exhaust. If the boiler does not burn, the water pump will stop. As soon as the pump stops, the water in the pipeline will lose pressure. Because the water in the pipeline is not full, the water will flow back and the gas will go up where the pipeline is high. In this way, when heating again, the house with higher floors will deflate again.

The solution is to add a check valve in front of your house (water supply and return), and then let each group of radiators vent once, so that the water in your radiator is basically full (except the radiator itself leaks), and the water in your radiator will not flow back to the system pipeline because of the pressure loss of the pipeline system. This will also reduce the degree of oxidation inside the radiator and increase the service life of the radiator.

An automatic exhaust valve can also be added, but exhaust is a process that takes time. During the exhaust period, because there is water and gas in the radiator, you will hear the sound of water hitting, plus the sound of automatic exhaust valve, your home will be a little noisy. The automatic exhaust valve is not automatic. Its automation refers to deflation, not the whole process of deflation. Open or close the safety valve on its lower (front) surface before and after deflation (this valve must be installed when installing the automatic exhaust valve, which is the specification for building heating installation, because the automatic exhaust valve is prone to rupture after being pressed for a long time).

If your city has a check valve for sellers, I suggest that you install a check valve.