External connection options
F1245 has software controlled inputs and outputs on the
input card (AA3), for connecting the extern switch func-
tion or sensor. This means that when an external switch
function or sensor is connected to one of six special
connections, the correct function must be selected to the
correct connection in the software in F1245.
Caution
If an external switch function or sensor is connec-
ted to F1245, the function to use input or output
must be selected in menu 5.4, see page 65.
Selectable inputs on the input card for these functions
are AUX1 (X6:9-10), AUX2 (X6:11-12), AUX3 (X6:13-14),
AUX4 (X6:15-16) and AUX5 (X6:17-18). Selectable out-
puts are AA3:X7.
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DFWLYDWH WHPS OX[
QRW XVHG
QRW XVHG
QRW XVHG
DODUP RXWSXW
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9
10
11
12
13
14
15
16
B
A
$$;
([WHUQDO )
$$;
The example above uses the inputs AUX1 (X6:9-10) andAUX2
(X6:11-12) on the input circuit board (AA3).
Caution
Some of the following functions can also be ac-
tivated and scheduled via menu settings.
Possible selection for AUX inputs
Switch for external blocking of addition and/or
compressor
In those cases external blocking of addition and/or com-
pressor is wanted, this can be connected to terminal block
X6 on the input card (AA3), which is positioned behind
the front cover.
The additional heat and/or the compressor are disconnec-
ted by connecting a potential free switch function to the
input selected in menu 5.4, see page 65.
External blocking of addition and compressor can be
combined.
A closed contact results in the electrical output being
disconnected.
Switch for external blocking of heating
In those cases external blocking of heat is used, this can
be connected to terminal block X6 on the input card
(AA3), which is positioned behind the front cover.
Heating operation is disconnected by connecting a poten-
tial free switch function to the input selected in menu
5.4, see page 65.
A closed switch results in blocked heating operation.
Switch for external forced control of brine pump
In those cases external forced control of brine pump is
used, this can be connected to terminal block X6 on the
input card (AA3), which is positioned behind the front
cover.
The brine pump can be force controlled by connecting a
potential free switch function to the input selected in
menu 5.4, see page 65.
A closed switch means that the brine pump is active.
Contact for activation of “temporary lux"
An external contact function can be connected to F1245
for activation of the hot water function“temporary lux".
The switch must be potential free and connected to the
selected input (menu 5.4, see page 65) on terminal block
X6 on the input circuit board (AA3).
"temporary lux" is activated for the time that the contact
is connected.
Contact for activation of “external adjustment"
An external contact function can be connected to F1245
to change the supply temperature and the room temper-
ature.
When the switch is closed the temperature changes in
°C (if the room sensor is connected and activated). If a
room sensor is not connected or not activated, the desired
offset of "temperature" (heating curve offset) is set with
the number of steps selected. The value is adjustable
between -10 and +10.
႑
climate system 1
The switch must be potential free and connected to
the selected input (menu 5.4, see page 65) on termin-
al block X6 on the input circuit board (AA3).
The value for the change is set in menu 1.9.2, "extern-
al adjustment".
႑
climate system 2 to 4
NIBE™ F1245Chapter 5 | Electrical connections24
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