25
• If you are using external NC contacts, connect both
cables (fed through the openings near screw ‘B’) with
the screw terminals ‘KL1’ (position ‘D’ in figure 16).
A
LED ‘
D1
’
B
Opening for wall mounting (in the figure a screw is
already inserted).
C
‘
TA1
’ button
D
Screw terminals for external NC contacts
(‘normally closed’)
E
Battery compartment for 2 AAA/micro batteries.
d) Initial operation of the ‘FHT80TF-2’
• Insert 2 size AAA/micro batteries into the battery compartment. Make sure that you observe
the correct polarity (see the illustration in the battery compartment or figure 16).
• The current operating mode of the door/window contact sensor is indicated by the blinking
‘
D1
’ LED.
Blinks 3 times
Internal contact is monitored
Blinks 4 times
External contacts are monitored
Blinks 5 times
Internal and external contacts are monitored
Afterwards a synchronisation phase takes place (for approx. 1 minute), during
which the signal LED blinks every second
If you purchased the door/window contact sensor separately and not as part of a set,
then it must now be registered to the heating control. Afterwards, the operating
mode can be selected.
TA1
D1
+
+
-
+
-
-
KL1
A
B
C
D
E
Figure 16
