Dear Wiessmann team, sorry that I am writing on English, but unfortunately I don't speak German language. I have a this kind of problem. I belong Vitocal 222G with Vitocell 100 E and use them already 4 years. It is perfect equipment, but twice my cellar flooded because the filter sump (FHPR34-B-AQ) on cold water line bursted. I though that reason is bad quality of filter sump ( 6bars WP), but later I found that pressure it this line increased to 8 bars when Vitocall 222G is working only for hot water. Hot water not for heating floor system, hot water for home needs ( shower, kitchen....). This high pressure (8 bars) damaged my filter's sump, UV water disinfection system-VIQUA and Aquahome 20N. Please for your assistance. Best regards. Nedelcho. Bulgaria.
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