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to the correct polarity. If possible use alkaline batteries.
•Closethebatterycompartment.
•Likeduringrstcommissioningtheheatingcontrolasks
you to enter date and time.
•However,thesettingsofthetimeprogram,thecomfort/
lowering temperature, etc., have been maintained.
•Sincetheheatingcontrolandthevalveoperatingmecha-
nisms are no longer synchonised after a battery replace-
ment the heating control performs an automatic synchro-
nisation that takes about 2 minutes (“SYnc Auto”).
After the synchronisation the heating control returns to
the normal operating mode.
b) “FHT8V” valve operating mechanism
If the batteries of the valve operating mechanism are emp-
ty, the battery symbol is displayed. In addition, an acoustic
signal in generated in intervals of 2 minutes for three hours
every day.
Proceedasfollowstoreplacethebatteries:
• Remove the cover of the valve operating mechanism’s
battery compartment (slide down).
•Remove the empty batteries and dispose of them ac-
cording to applicable environmental regulations
• Wait until all segments of the valve operating mecha-
nism’sLCdisplayareoff.Youmayspeedupthisprocess
by pressing the key on the valve operating mechanism.
•InserttwonewLR6(Mignon/AA)batteriesintothebat-
tery compartment. Pay attention to the correct polarity. If
possible use alkaline batteries.
•The display shows “C1” followed by a 2-digit number,
followedby“C2”andanother2-digitnumber(bothnum-
bers together are the currently stored safety code of the