Hydrosensor, with automatic frost protection at 8⁰C

Temperature range 8–28⁰C with frost set closure.

Assembly onto the valve body is only possible by using the tightening tool 1 9554 01 and Allen key 1 6616 00 (both to be ordered separately). The concealed temperature settings are locked and can be accessed with the unlocking tool 1 9554 00 (included).

The 1 9861 10 or 40 allows the highest temperature set point to be decreased by 10k or 4k with a coin slot operation on the top of the head, without changing the concealed base set point.