Vaillant boilers are modern** heating and hot water systems, usually with a high degree of self-regulation. If you find that the water pressure of the wall-hung boiler is too high, you can adjust it by following these steps:
1.Turn off the wall-hung boiler: Before adjusting the water pressure, make sure the wall-hung boiler is turned off to avoid injury caused by hot water or steam spewing out.
2.Find the pressure gauge: In a wall-hung boiler system, there will usually be a water pressure gauge that shows the water pressure in the system. Find this pressure gauge.
3.Drain water and regulate pressure: If the pressure shown by the water pressure gauge exceeds the safe range (usually this range is 1-3 bar, see the instructions of the wall-hung boiler), you can release a part of the water through the drain valve of the wall-hung boiler (usually located below the wall-hung boiler) to reduce the pressure. When releasing water, make sure that the direction of the water flow is not towards people.
4.Find a pressure reducing valve: If there is a pressure reducing valve in the wall-hung boiler system, the pressure of the system can be controlled by adjusting the pressure reducing valve. If the pressure is still too high, you can try gently rotating the regulator's adjustment screw to reduce the pressure to a safe level.
5.Check for water leaks: If the system is often experiencing excessive pressure, it may be because there are water leaks in the system. Inspect all pipes, valves, and fittings for leaks.
6.Contact a professional: If none of the above steps can solve the problem, or you are not sure how to operate, please contact a professional maintenance personnel in time for inspection and repair.
Please note that when operating a wall-hung boiler or any other complex HVAC equipment, you should follow the device's instruction manual and safety guidelines. If you are not familiar with the operation of a wall-hung boiler or are not sure how to adjust it safely, the safest course of action is to contact a professional repair service.