Nibe S1155 Installer Manual page 23

EXTERNAL CONNECTIONS
Connect external connections on terminal blocks X28, X29
and X30 on the base board (AA2).
BT1 14
BT50 13
BT25 12
BT6 11
AUX8 10
AUX7 9
AUX6 8
AUX5 7
AUX4 6
AUX3 5
AUX2 4
AUX1 3
+5V 2
0-5V 1
-X28
Sensors
Outside sensor
The outdoor temperature sensor (BT1) is placed in the shade
on a wall facing north or north-west, so it is unaffected, for
example, by the morning sun.
Connect the outdoor temperature sensor to terminal block
AA2-X28:14 and AA2-X29:GND.
If a conduit is used it must be sealed to prevent condensa-
tion in the sensor capsule.
AA2-X28
BT1 14
BT50 13
BT25 12
BT6 11
AUX8 10
AA2-X29
Temperature sensor, hot water charging
The temperature sensor, hot water charging (BT6) is placed
in the submerged tube on the water heater.
Connect the sensor to terminal block AA2-X28:11 (or to one
of the selectable AUX inputs) and to terminal block AA2-
X29:GND.
Settings for hot water are made in menu 2 "Hot water".
AA2-X28
BT6 11
AUX8 10
AUX7 9
AUX6 8
AUX5 7
AA2-X29
NIBE S1155
AA2
X27
POWER
ERROR
12 BE3 INT COM
11 BE2 EXT COM
CPU
10 BE1
PWM1
9 GND
PWM0
X30
8 +5V
7 0-5V
6 OT−
5 OT+
4 A
3 B
X29
2 +12V
1 GND
-X29 -X30
X28
BT1
BT6
Temperature sensor, hot water top
A temperature sensor for hot water top (BT7) can be connec-
ted to S1155 to show the water temperature at the top of
the tank (if it is possible to install a sensor at the top of the
tank).
Connect the sensor to terminal block X28:10 (or to one of
the other selectable AUX inputs) and to terminal block AA2-
X29:GND.
AA2-X28 BT7
AUX8
10
AUX7
9
AUX6
8
AUX5 7
6
AUX4
AA2-X29
External supply temperature sensor
If an external supply temperature sensor (BT25) needs to
be used, connect it to terminal block AA2-X28:12 and to
terminal block AA2-X29:GND.
AA2-X28
BT1 14
BT50 13
BT25 12
BT6 11
AUX8 10
AA2-X29
Chapter 5 | Electrical connections
BT25
23