Hitachi YUTAKI S80 Series - RAS-(4-6)H(V)RNME-AF + RWH-(4.0-6.0)FS(V)NFE Combination

8. Refrigerant cycle and hydraulic circuit
TCGB0075 rev.0 - 11/2012
96
8.1 RAS-(4-6)H(V)RNME-AF + RWH-(4.0-6.0)FS(V)NFE combination
No. Part name No. Part name No. Part name No. Part name No. Part name
1 Outdoor unit compressor 13 Solenoid valve 25 Indoor unit manometer 37 Water outlet connection (1”) 49 IU compressor suction thermistor
2 Outdoor unit heat exchanger 14 Ambient thermistor 26 Water pressure switch 38 DHW inlet connection (3/4”) 50 IU compressor discharge thermistor
3 Liquid tank 15 Evaporator pipe thermistor 27 Expansion vessel 39 DHW outlet connection (3/4”) 51 Indoor unit compressor
4 Outdoor unit expansion valve 16 OU compressor discharge thermistor 28 Water pump 40 T-branch 52 IU high pressure switch (protection)
5 Reversing valve 17 Refrigerant gas connection 29 Water outlet thermistor 41 Water pressure port (G 3/8”) 53 Check valve
6 Strainer 18 Refrigerant liquid connection 30 Water ow switch 42 Water inlet thermistor 54 Evaporating heating thermistor
7 Distributor 19 Gas pipe thermistor 31 3-way valve 43 Water strainer 55 Liquid pipe thermistor
8 R410A check joint (1/2”) 20 Plate heat exchanger (R410A-R134a) 32 Domestic hot water tank 44 Safety valve 56 Indoor unit expansion valve (1st cycle)
9 OU high pressure switch (protection) 21 Indoor unit expansion valve (2nd cycle) 33 DHWT manometer 45 Plate heat exchanger (R410A-H2O)
10 Gas pipe stop valve 22 Evaporating cooling thermistor 34 Flexible water pipe (1”) 46 R134a check joint (7/16”)
11 Liquid pipe stop valve 23 Plate heat exchanger (R134a-H2O) 35 Flexible water pipe (3/4”) 47 Low pressure sensor (Ps)
12 Pressure switch (control) 24 Air purger 36 Water inlet connection (1”) 48 High pressure sensor (Pd)
Refrigerant 1: Refrigerant 2:
Heating refrigerant ow Water ow Field supplied piping line Flare Nut connection Brazed connection R-410A R-134a