Nibe S1156 - External Connection Points; Sensor Connections; Outdoor Sensor Installation; Hot Water Charging Sensor Connection

EXTERNAL CONNECTIONS
Connect external connections on terminal blocks X28, X29
and X30 on the base board (AA2).
-X29
-X28
0-5V 1
+5V 2
AUX1 3
AUX2 4
AUX3 5
AUX4 6
AUX5 7
AUX6 8
AUX7 9
AUX8 10
BT6 11
BT25 12
1
1 2 3
2
3
4
5
6
7
8
9
10
11
12
GND
+12V
B
A
OT+
OT−
0-5V
PWM0
PWM1
CPU
EXT COM
INT COM
ERROR
POWER
+5V
GND
BE1
BE2
BE3
K10
-X2
7
NO
O
NC
AUX-RE
LAY
BT50 13
BT1 14
-X30
X30
X29
X28
AA2
X27
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.
13
12
11
10
14
BT50
BT25
BT6
AUX8
BT1
BT1
AA2-X28
AA2-X29
Temperature sensor, hot water charging start
The temperature sensor, hot water charging start (BT5) can
be placed in the submerged tube on the water heater
between temperature sensor, hot water charging (BT6) and
temperature sensor, hot water top (BT7).
Connect the sensor to terminal block X28:10 (or to one of
the other selectable AUX inputs) and to terminal block AA2-
X29:GND.
9
8
7
6
10
AUX6
AUX5
AUX4
AUX8
AUX7
BT5
AA2-X28
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".
10
9
8
7
11
AUX6
AUX5
BT6
AUX8
AUX7
BT6
AA2-X28
AA2-X29
Temperature sensor, hot water top
A temperature sensor for hot water top (BT7) can be connec-
ted to S1156 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.
9
8
7
6
10
AUX6
AUX5
AUX4
AUX8
AUX7
BT7
AA2-X28
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.
13
12
11
10
14
BT50
BT25
BT6
AUX8
BT1
BT25
AA2-X28
AA2-X29
NIBE S1156Chapter 5 | Electrical connections24