HERZ thermostatic head “H” in robust design to prevent vandalism, theft and unauthorised operation. With threaded connection M 30 x 1.5

With liquid sensor (hydrosensor), set point range 8–26°C, with automatic frost protection. Mounting and removal only possible with tightening tool 1 9554 01 and Allen key 1 6616 00. Setting of the set point with unlocking tool 1 9554 00 (enclosed), set point setting locked. Setting indicator remains concealed in locked position.