How to adjust the low wind pressure of wall-hung boiler

Open the tap water replenishing valve under the wall-hung boiler, and then turn it counterclockwise to let tap water enter the heating system. Then observe the pressure gauge on the wall-hung boiler. If there is no pressure gauge, you can check the pressure value on the display screen of the wall-hung boiler. When the pressure reaches 1.5bar( 1.5 kg), close the makeup valve clockwise. When replenishing water, open the manual exhaust valve on each radiator to discharge gas. If it is floor heating, open the exhaust valve of the water separator.