Nibe S1256 - Distribution Boxes

Distribution boxes
UN
-X29
-X28
1 0-5V 2 +5V
3 AUX1 4 AUX2 5 AUX3 6 AUX4 7 AUX5 8 AUX6 9 AUX7
10 AUX8 11 AUX9 12 BT25
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
-X27
NO
O
NC
AUX-RELAY
13 BT50 14 BT1
-X30
FQ10-S2
FQ10
AA2
AA8
RA3
RA1
RF2
ELECTRICAL COMPONENTS
Base cardAA2
Electrical anode board
1
AA8
Temperature limiterFQ10
FQ10-S2 Reset button for temperature limiter
Choke
2
RA1
Choke
3
RA3
EMC filter
4
RF2
1
Only heat pump with enamelled vessel.
2
Only for S1256-13 3x400 V
3
Only for S1256-13 3x400 V
4
Only for S1256-13 1x230 V / 3x230 V
11Chapter 3 | The heat pump designNIBE S1256