What air pressure should be in the empty DHW expansion tank?

Each DHW expansion tank has its own passport data, in which these values ​​are already written. But the cases are different, and for each system, sometimes you need to independently adjust the pressure indicators in the expansion tank.

Here is a link to exel table file, where you can calculate the necessary indicators by entering your data. It will be useful not only to you, but also to many who need accurate calculations of the pressure in the expansion tank for domestic hot water.