Pipe connections
Heating medium connection, supply (from F2050)XL1
Heating medium connection, return (to F2050)XL2
Sensors etc.
High pressure pressostatBP1 (63H1)
Low pressure transmitterBP2 (LPT)
High pressure sensorBP4
Temperature sensor, returnBT3
Temperature sensor, condenser supply lineBT12
Temperature sensor, hot gasBT14 (Tho-
D)
Temperature sensor, fluid pipeBT15
Temperature sensor 1, evaporatorBT16 (Tho-
R1)
Temperature sensor, suction gasBT17 (Tho-
S)
Temperature sensor, ambientBT28 (Tho-
A)
Temperature sensor 2, evaporatorTho-R2
Electrical components
Communication boardAA23
Fuse for external heating cableAA23-F3
DIP switch, addressing of outdoor moduleAA23-S3
Terminal block, KVRAA23-X1
Terminal block, communication from indoor moduleAA23-X4
Terminal block, communication outdoor moduleAA23-X100
Compressor heaterEB10 (CH)
Drip tray heaterEB11 (DH)
Main fuse compressor unitF
FanGQ1 (FM01)
FanGQ2 (FM02)
Control board(PWB1)
Inverter board(PWB2)
Filter board(PWB3)
EMC filter for inverterRF2
EMC filter for incoming supplyRF3
Terminal block, incoming supply and communication
with board AA23
(TB)
Cooling components
EvaporatorEP1
CondenserEP2
CompressorGQ10 (CM)
Drying filterHS1
Shut-off valve, liquid lineQM36
Shut-off valve, gas lineQM37
Expansion valve, heatingQN1 (SM2)
4-way valveQN2 (20S)
Expansion valve, coolingQN3 (SM1)
Miscellaneous
Type platePZ1
Serial numberPZ3
Cable gland, incoming supplyUB1
Cable grommet, communicationUB2
Cable gland, heating cable (EB14)UB3
Cable, incoming supplyW1
Designations according to standard EN 81346-2.
Designations within brackets according to the supplier’s standard.
NIBE F2050Chapter 3 | The heat pump design16
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