Operating manual for the auroMATIC 620 Controller 0020094404_0012
Frost protection function
The controller is equipped with a frost protection
function (depends on the outside temperature). The
frost protection function ensures that the heating
installation is protected from frost in the Off and Eco
(outside the time windows) modes.
If the Eco mode is set and the frost protection function
(dependent on the outside temperature) is not activa-
ted, then the heating circuit will be switched off during
the set-back period.
The preset (night) set back temperature is applied auto-
matically for each heating circuit if the outside tempera-
ture falls below +3 °C.
3 Description of the appliance