Return pipe heating pipe deflates: the whole heating pipe is not hot, probably because the outdoor water inlet and outlet valves are not opened. The single household is not hot locally, which may be caused by the fact that the top floor is not deflated.
The radiator is half hot and half cold, which is caused by gas accumulation at the tail. In short, under the condition of ensuring the circulating pressure and temperature, the main reason for not being hot is air blockage, which can be solved by proper deflation.
Extended data:
The matters needing attention for return pipe air bleeding of heating pipeline are introduced as follows:
The main problem of heating is the gas accumulation in the pipeline, which leads to poor water circulation. When residents drain water from the radiator, what they release from the radiator is actually gas.
The amount of water discharged is very small, and some residents don't understand it. Putting a large basin of water will not only waste water, but also make the hot water in the heating pipe not be stored enough, resulting in the heating not reaching its proper temperature.