elv FHT8-Set - 11 Replacing of Batteries; A) FHT8 R Heating Control

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distribution of the heating power seems to be optimal.
Setting the offset does not change the displayed per-
centage of the valve opening (valve position). The off-
set value only influences the slope of the valve char-
acteristic.
At a control value of 10% given by the heating control a
valve with a positive offset is opened wider than a valve
with a negative offset, although the displayed value is 10%
for both valves.
11. Replacing the battery
a) “FHT8R” heating control
If the battery symbol (“
“)isdisplayedontheLCdisplay,
the battery voltage is low and they have to be replaced.
In addition, the heating control generates an acoustic alarm
every 2 minutes.
At night the acoustic alarm is not generated, but only during
thefollowingthreeperiodsoftime:
•from10.00hrsto11.00hrs
•from17.00hrsto18.00hrs
•from21.00hrsto22.00hrs
Proceedasfollowstoreplacethebatteries:
•Taketheheatingcontroloffthewallholderandopenthe
cover of the battery compartment (slide down).
• Removethe empty batteries fromthe battery compart-
ment and dispose of them according to applicable envi-
ronmental regulations
•InserttwonewLR6(Mignon/AA)batteries;payattention