When using the heating system in winter, how much should the general pressure of the wall-hung boiler be adjusted?

The standard water pressure is 1- 1.2bar, but in practice, because there is some air in the heating system and boiler, when the boiler is running, the air in the system is continuously discharged from the exhaust valve in the boiler, and the boiler pressure will drop irregularly.

When heating in winter, the water in the heating system expands when heated, and the water pressure in the system will rise, and then the pressure will drop after the water is cooled. This is a normal phenomenon. Experiments show that as long as the water pressure in the wall-hung boiler is kept between 0.5- 1.5bar, the normal use of the wall-hung boiler will not be affected at all.

When the system pressure rises during heating, if it exceeds 3bar, the safety valve of the boiler will automatically drain water, which may cause unnecessary losses. Under normal circumstances, it can be replenished once every one to two months, and some brands such as Voorburg in Germany have automatic replenishment function.

Extended data:

The hot water tap should not be turned on to the maximum at once: when the hot water tap is turned on and the hot water flows out, the boiler has a delay of about 6 seconds. At this time, there is cold water in the pipeline between the boiler and the faucet, so it is cold water even if the faucet is opened to the maximum during this time.

If you turn it to the maximum, you will waste a lot of cold water. Therefore, when using hot water, you should turn on the small water flow first, and then adjust the water flow according to your own needs after the boiler starts to delay the ignition, which can save a lot of water and the temperature rise time of water is short.

Especially for large units with bathrooms far away from boilers.