Nibe S1155PC Installer Manual page 20

EXTERNAL CONNECTIONS
External connections are connected on terminal blocks
X28, X29 and X30 on the PCB (AA2).
BT1 14
BT50 13
BT25 12
AUX9 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 sensor (BT1) is placed in the shade on a
wall facing north or north-west, so it is unaffected e.g.
by the morning sun.
The outdoor sensor is connected to terminal block AA2-
X28:14 and to any input on terminal block AA2-X29.
If a conduit is used it must be sealed to prevent condens-
ation in the sensor capsule.
AA2-X28
BT1 14
BT50 13
BT25 12
AUX9 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 other selectable AUX inputs) and to any input
on terminal block AA2-X29.
Settings for hot water are made in menu 2 "Hot water".
AA2-X28
BT6 11
AUX8 10
AUX7 9
AUX6 8
7
AUX5
AA2-X29
20 Chapter 5 | Electrical connections
AA2
POWER
X27
ERROR
12 BE3 INT COM
EXT COM
11 BE2
CPU
10 BE1
PWM1
9 GND
PWM0
8 +5V
X30
7 0-5V
6 OT−
5 OT+
4 A
3 B
2 +12V
X29
1 GND
-X29 -X30
X28
BT1
BT6
Temperature sensor, hot water top
A temperature sensor for hot water top (BT7) can be
connected to S1155PC 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 any input on
terminal block AA2-X29.
AA2-X28 BT7
AUX8
10
AUX7
9
AUX6
8
AUX5 7
6
AUX4
AA2-X29
Temperature sensor, external flow line
Connect temperature sensor, external supply line (BT25)
to terminal block AA2-X28:12 and to any input on termin-
al block AA2-X29.
AA2-X28
BT1 14
BT50 13
BT25 12
AUX9 11
AUX8 10
AA2-X29
BT25
NIBE S1155PC