Operating instructions

• 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

KL1

Figure 16