How to relieve pressure in Viessmann wall-hung boiler

How to relieve pressure in Viessmann wall-hung boiler

Viessmann wall-mounted boilers are the core equipment of home heating systems, and their safe operation is crucial. Pressure relief is one of the important operations for maintaining wall-hung boilers. Especially when the system pressure is too high, timely pressure relief can avoid equipment damage or safety hazards. This article will introduce the pressure relief method of Viessmann wall-mounted boiler in detail, and attach relevant data for reference.

1. The necessity of pressure relief for Viessmann wall-hung boilers

During the operation of the wall-hung boiler, the system pressure will fluctuate due to changes in water temperature. Normally, the pressure should be maintained between 1-2 bar. If the pressure is too high (more than 3 bar), it may cause damage to the pipeline or equipment. At this time, the excess pressure needs to be released through the pressure relief valve.

2. Viessmann wall-hung boiler pressure relief steps

The following are the specific steps for pressure relief of Viessmann wall-hung boilers:

1.power off: Make sure the wall-hung boiler is powered off to avoid accidents during operation.

2.Check pressure gauge: Confirm the current system pressure value and determine whether pressure relief is needed.

3.Find the pressure relief valve: Usually located on the bottom or side of the boiler, is a valve with a knob or screw.

4.Slowly turn pressure relief valve: Turn the valve counterclockwise and hear a "hissing" sound indicating the pressure is being released. Pay attention to controlling the pressure relief speed to avoid sudden pressure drop.

5.Observe the pressure gauge: When the pressure drops to about 1.5 bar, close the pressure relief valve clockwise.

6.Restart the boiler: After confirming that the pressure is normal, re-energize and start the device.

3. Common problems during the pressure relief process

1.Pressure relief valve cannot be opened: The valve may be rusted or clogged. It is recommended to contact a professional to handle it.

2.Pressure continues to rise after pressure relief: It may be that the water replenishing valve is not closed or there is water leakage in the system, and further inspection is required.

3.Pressure relief too fast: It may cause water shortage in the system and affect the operation of the equipment. Please operate slowly.

4. Measures to prevent excessive stress

To avoid frequent pressure relief, the following precautions are recommended:

1.Check the water replenishment valve regularly: Make sure the water replenishing valve is closed to avoid abnormal increase in system pressure.

2.Maintain expansion tank: Failure of the expansion water tank may cause pressure fluctuations and requires regular inspection.

3.Avoid high temperature operation: Water temperature that is too high will aggravate the pressure rise, and setting the temperature appropriately can reduce the risk.

5. Summary

Viessmann wall-hung boiler pressure relief is a simple but important maintenance operation. Correctly mastering the pressure relief method can extend the life of the equipment and ensure safety. If you encounter difficulties during operation, it is recommended to contact professional technicians. Regular maintenance and inspection are the key to avoiding pressure abnormalities. Users should develop good habits to ensure stable operation of the wall-hung boiler.