How about a set of radiators that are hot and cool?
Northerners are never afraid of low temperatures and cold waves. We have cold-resistant artifacts-radiators. Especially in the district with central heating, the temperature in the room is close to Xiao Yangchun. In the room, you can eat ice cream, wear shorts, and even need to open the window because it is too hot. But if there is a radiator in the house but it is not hot, it is more sad. What often happens in winter: some radiators are not hot, some are not hot enough, and some of the same group of heaters are cooler and cooler.
In fact, the phenomenon that the radiator is not hot has always troubled the residents, especially the phenomenon that the same group of radiators have a few hot and not hot, which is incredible. Why is this?
Generally speaking, if the same group of radiators is half hot and half cold, there is a gas pressure in the inside, so the water circulation is not smooth. Some radiator pipes are filled with hot water, which will be very hot. There is gas in it and it will be cooler. In this case, first gently open the air valve, and when you hear a "hissing" sound, it indicates that gas is flowing out.
When you see water seeping out, immediately close the bleed valve. A few cool radiators will heat up after a while.
When deflating, you must twist the valve gently, never twist it vigorously, let alone unscrew the valve. If the valve is accidentally unscrewed, causing water to surge, immediately block the hole with a towel, chopsticks, etc., and then contact the after-sales department for on-site repairs.
If the bleed valve cannot be screwed, you can twist it gently with the help of a tool such as a wrench, but be careful not to screw the valve. In addition, for rusted valves, do not screw them arbitrarily to avoid damage, you can contact the maintenance department to come to your door for repair.