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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
K1
0
-X2
7
NO
O
NC
A
UX-RE
LA
Y
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
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 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 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 S1155PC
Chapter 5 | Electrical connections
20
Содержание S1155PC
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