Refrigerant Cycle - Hitachi RAS-4HRNS3E Installation And Operation Manual

Refrigerant cycle

11 REFRIGERANT CYCLE
Example of RAS-4H(V)NP1E:

B
A
7S138311
Example of RAS-4H(V)RNS3E:

B
A
7S136195
Refrigerant flow
or cooling
8
F
C
E
F
C
F
E
Refrigerant flow Connection by
for heating
PMML0317A rev.1 - 11/2013
D
D
Connection by
flare nut welding
Mark Part name
1 Compressor
2 Heat exchanger
3 Accumulator
4 Receiver
5 Micro-computer control expansion valve
6 Reversing valve
7 Solenoid valve for gas bypass
8 Strainer
9 Distributor
10 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 Check valve
16 Silencer
17 Pressure switch for control
Mark Part name
A Gas line refrigerant piping connection
B Liquid line refrigerant piping connection
C Outdoor unit
D Ambient thermistor
E Discharge gas thermistor
F Pipe thermistor
No. Part name
1 Compressor
2 Heat exchanger
3 Accumulator
4 Micro-Computer control expansion valve
5 Reversing valve
6 Solenoid valve for gas bypass
7 Strainer
8 Distributor
9 Check joint
10 High pressure switch for protection
11 Pressure switch for control
12 Stop valve for gas line
13 Stop valve for liquid line
14 Silencer
R410A 4.15 MPa
Leakage test
Gas refrigerant
pressure