Nibe F1245 Series Installation Manual page 24

CONNECTING EXTERNAL OPERATING
VOLTAGE FOR THE CONTROL SYSTEM
NOTE
Mark up any junction boxes with warnings for
external voltage.
If you wish to connect external operating voltage for the
control system to F1245 on the immersion heater circuit
board (AA1) the edge connector at AA1:X2 must be
moved toAA1:X9 (as illustrated).
Operating voltage (1x230V ~ 50Hz) is connected to
AA1:X11 (as illustrated).
AA1-X8
AA1-X2
AA1-X9
L PE N
1x230V+N+PE operating voltage
1x230V+N+PE
CONNECTING SENSORS
Connect the sensor(s) to
terminal X6 on input
board(AA3) according to the
instructions below.
24 Chapter 5 | Electrical connections
N 0 PE L1 1 L2 L3
AA1
AA1-X11
AA3-X6
Outside sensor
Install the outdoor temperature sensor (BT1) in the
shade on a wall facing north or north-west, so it is unaf-
fected by the morning sun for example.
Connect the sensor to terminal block X6:1 and X6:2 on
the input board (AA3). Use a twin core cable of at least
0.5 mm² cable area.
If a conduit is used it must be sealed to prevent condens-
ation in the sensor capsule.
External
BT1
Temperature sensor, external flow line
If temperature sensor, external flow line (BT25) needs
to be used, connect it to terminal block X6:5 and X6:6
on the input card (AA3). Use a 2 core cable of at least
0.5 mm² cable area.
BT25
Temperature sensor, external return line
If temperature sensor, external return line (BT71) needs
to be used, connect it to one of the AUX inputs on the
input board (AA3). Use a 2 core cable of at least 0.5 mm²
cable area.
BT71
BT71
Room sensor
F1245 is supplied with a room sensor enclosed (BT50).
The room sensor has a number of functions:
Shows current room temperature in the display on
1.
F1245.
2. Option of changing the room temperature in °C.
3. Provides the option of fine-tuning the room temper-
ature.
F1245
1
2
3
4
AA3-X6
F1245
F1245
4
5
6
7
AA3-X6
F1245
F1245
9
10
11
12
13
14
15
16
17
18
AA3-X6
NIBE F1245