Hitachi RAS-3-HVNC - High Pressure Protection Device

10. Servicing
434
SMGB0079 rev.0 - 01/2013
10.4.3.12 Removing Electronic expansion Valve and Solenoid Valve
1 Remove the service cover, the bottom service cover and the rear cover following Removing service cover and Remo-
ving bottom service cover and rear cover.
2 Recover the refrigerant from check joints according to Removing Compressor.
3 Remove the coils according to Removing Electronic Expansion Valve Coil and Removing Reversing and Solenoid
Valves Coils.
Removing electronic expansion valve
1 Remove the brazed parts as shown in the gure.
- Electronic Expansion Valve (EVO) Brazed Parts: 2
a. Remove the electronic expansion valve with cooling
the valve bodies by wet cloth.
b. Perform the brazing work with attention not to burn
the electrical wirings and the piping insulations.
Electronic expansion valve
Brazing parts
2 When reassembling after replacing the valves, perform in the reverse procedure of removing.
N O T E
Runtheleadwirestobelocatedtotheoriginalposition,andxthembytheplasticband.
Removing solenoid valves
1 Remove the brazed parts and the are connections as
shown in the gures.
- Solenoid Valve (SVA) Brazed Parts: 2
- Solenoid Valve (SVC) Brazed Parts: 2
- Solenoid Valve (SVF) Flare connections: 2
a. Remove the solenoid valves with cooling the valve
bodies by wet cloth.
b. Perform the brazing work with attention not to burn
the electrical wirings and the piping insulations.
c. Perform the are connection work using two span-
ners to avoid twisting pipes.
Brazing part
Solenoid valve
(SVF)
Solenoid valve
(SVA)
Brazing
part
Flare nut
Flare nut
2 When reassembling after replacing the valves, perform in the reverse procedure of removing.
N O T E
Runtheleadwirestobelocatedtotheoriginalposition,andxthembytheplasticband