B) "Fht8V" Valve Operating Mechanism - Elv Fht8-Set Bedienungsanleitung

to the correct polarity. If possible use alkaline batteries.
• Close the battery compartment.
• Like during first commissioning the heating control asks
you to enter date and time.
• However, the settings of the time program, the comfort/
lowering temperature, etc., have been maintained.
• Since the heating control and the valve operating mecha­
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.
Proceed as follows to replace the batteries:
• 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's LC display are off. You may speed up this process
by pressing the key on the valve operating mechanism.
• Insert two new LR6 (Mignon/AA) batteries into the bat­
tery compartment. Pay attention to the correct polarity. If
possible use alkaline batteries.
• The display shows "C1" followed by a 2-digit number,
followed by "C2" and another 2-digit number (both num­
bers together are the currently stored safety code of the
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