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 X6:7 and X6:8 on
the input board (AA3). Use a twin core cable with a cable
area of at least 0.5 mm².
Hot water charging is activated in menu 5.2 or in the
start guide.
1 2
3
4
L N
1
1
0
PE
2
3 4
AA3-X6
LEK
TEMPERATURE SENSOR, HOT WATER TOP
A temperature sensor for hot water top (BT7) can be
connected to SMO 40 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 X6:15 and X6:16
on the input board (AA3). Use a twin core cable with a
cable area of at least 0.5 mm².
1 2
3
4
L N
1
1
0
PE
2
3 4
AA3-X6
LEK
TEMPERATURE SENSOR, EXTERNAL FLOW
LINE
Connect temperature sensor, external supply line (BT25)
(required for additional heat after reversing valve
(QN10)), to terminal block X6:5 and X6:6 on the input
board (AA3). Use a twin core cable with a cable area of
at least 0.5 mm².
1 2
3
4
L N
1
1
0
PE
2
3 4
AA3-X6
LEK
26
Chapter 5 | Electrical connections
SMO Externt
SMO 40
External
6
7
8
9
BT6
10
11
12
13
AA3-X6
SMO Externt
SMO 40
External
11
12
13
14
15
16
17
BT7
18
AA3-X6
SMO Externt
SMO 40
External
4
5
6
7
BT25
8
9
10
11
AA3-X6
TEMPERATURE SENSOR, EXTERNAL
RETURN LINE
Connect temperature sensor, external return line (BT71)
to terminal block X6:17 and X6:18 on the input board
(AA3). Use a twin core cable with a cable area of at least
0.5 mm².
1 2
3
4
L N
1
1
0
PE
2
3 4
AA3-X6
LEK
Caution
For docking that requires connection of other
sensors, see
"Possible selection for AUX in-
puts" on page 30.
SMO Externt
SMO 40
External
11
12
13
14
15
16
17
18
BT71
AA3-X6
NIBE SMO 40