Hot water preparation unit e.g. electrical continuous flow heater

摘要

The shut-off valve (6) is open up to the normal max water mains pressure and a normal max water temp. The shut-off valve closes, with a higher pressure in the hot water preparation unit (1), than the normal max water mains pressure and/or a temp. higher than the normal max. water temp. The shut-off valve (6) is closed, over a pressure in the water section (7) of the hot water preparation unit (1), from about 10 bar above the normal max water mains pressure. The shut-off valve remains shut at this and higher pressures from the pipeline (3).