Hitachi YUTAKI S Series User Manual

5.1.3.2 Indoor unit for integrated tank version
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RAS-(4-6)WHVNP + RWH-(4.0-6.0)(V)NFWE
Refrigerant 1 Refrigerant 2
Heating refrigerant ow Water ow Field supplied piping line Flare nut connection Brazed connection R-410A R-134a
Nº Part name
1 OU compressor 2 Air side heat exchanger 3 Accumulator 4 Receiver 5 OU electronic expansion valve 6 4-way valve 7 Solenoid valve for gas by-pass 8 OU refrigerant strainer 9 Distributor
10 OU R-410A check joint
11 High pressure switch for protection
12 Sensor for refrigerant pressure 13 Stop valve for gas line 14 Stop valve for liquid line 15 OU check valve 16 Silencer 17 Pressure switch for control 18 Ambient thermistor
Nº Part name
19 OU compressor discharge gas thermistor 20 OU pipe thermistor 21 OU refrigerant gas connection 22 OU refrigerant liquid connection 23 IU electronic expansion valve (R-410A) 24 IU refrigerant strainer 25 IU R-410A check joint 26 Check valve for R-410A 27 IU heat exchanger (R410A-R134a) 28 Solenoid valve 1 (For 1 cycle) 29 Solenoid valve 2 (For 2 cycles) 30 IU compressor 31 Low pressure sensor (Ps) 32 High pressure sensor (Pd) 33 IU high pressure switch (protection) 34 R-134a check joint 35 Check valve for R-134a 36 IU electronic expansion valve (R-134a)
Nº Part name
37 IU heat exchanger (R134a-H2O) 38 IU heat exchanger (R410A-H2O) 39 3-way valve 40 Manometer 41 Safety valve 42 Drain pipe 43 Connection for DHW tank (outlet) 44 Expansion vessel 45
Air valve for pressure regulation of expansion vessel
46 Air purger 47 Water strainer 48 Water pump 49 Water pressure port 50 IU refrigerant gas connection 51 IU refrigerant liquid connection 52 Water inlet connection 53 Water outlet connection
Nº Part name
54 Shut-off valve (Accessory) 55 Domestic hot water tank 56 DHW inlet 57 DHW outlet 58 Flexible pipe for space heating 59 Flexible pipe for DHW 60 IU gas pipe thermistor 61 IU liquid pipe thermistor 62 IU compressor suction gas thermistor 63 IU compressor discharge gas thermistor 64 Water inlet thermistor 65 Water outlet thermistor 66 DHW tank thermistor
Outdoor unit
YUTAKI S80
Optional
REFRIGERANT CYCLE AND HYDRAULIC CIRCUIT
PMML0335A rev.1 - 04/2016
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Hitachi YUTAKI S Series Specifications

General

Brand	Hitachi
Model	YUTAKI S Series
Category	Heat Pump
Language	English