Changing Batteries - HomeMatic HM-CC-TC Installation And Operating Manual

The date and time are now set in the heating controller and the
standard display appears again. If the heating controller is taught
on a center, the controller will request the date and time from the
center when the battery is changed next and if this is successful,
the standard display appears again immediately.
6.1.3

Changing batteries

Caution! Danger of explosion if battery is replaced improperly.
If the room thermostats indicate low batteries (see section 9 Error
messages), you must replace the old batteries with two new battery
of type LR6 (Mignon). Open the battery compartment as described
above, remove the old batteries and insert the new ones. Ensure
proper polarity.
Used batteries are not to be disposed of with the
house-hold waste! Please dispose them at your
local battery collection point!
39