Nibe S1255PC - Distribution Boxes; Cooling Sections

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
ELECTRICAL COMPONENTS
Base cardAA2
Electrical anode board
1
AA8
Temperature limiterFQ10
FQ10-S2 Reset button for temperature limiter
1
Only heat pump with enamelled vessel.
Cooling sections
QN18
BT12
AA3
BT11
GP2
GP1
QM2
QM1
BT10
EP6
BT3
RF2
EP2
RA1
BT15
XL21
QA40
BT17
BP1
BT14
HS1
XL20
EB10
EP1
GQ10
QN1
BP2
CA1
EP6
PIPE CONNECTIONS
Service connection, high pressureXL20
Service connection, low pressureXL21
HVAC COMPONENTS
Circulation pumpGP1
Brine pumpGP2
Drainage, climate systemQM1
Draining, brine sideQM2
Mixing valve, coolingQN18
SENSORS ETC.
High pressure pressostatBP1
Low pressure pressostatBP2
Temperature sensors, heating medium returnBT3
Temperature sensor, brine inBT10
Temperature sensor, brine outBT11
Temperature sensor, condenser supply lineBT12
Temperature sensor, hot gasBT14
Temperature sensor, fluid pipeBT15
Temperature sensor, suction gasBT17
ELECTRICAL COMPONENTS
Input circuit boardAA3
Compressor heaterEB10
InverterQA40
EMC-filterRF2
COOLING COMPONENTS
EvaporatorEP1
CondenserEP2
Heat exchanger, coolingEP6
CompressorGQ10
Drying filterHS1
Expansion valveQN1
11Chapter 3 | The heat pump designNIBE S1255PC