Replacement Of The Pressure Relief Valve; Replacement Of The Sight Glass; Replacement Of The Stop Valve (X3) - Hitachi SAMURAI Series Service Manual

3. Servicing
Cycle components
3.3.12 Replacement of the pressure sensor (PS)
1 Disconnect the cables (7 and 8 of the pressure
sensor form the E-box of the compressor termi-
nal board).
2 Unscrew the sensor and proceed to its replace-
ment
3 When reassembling proceed in reverse order
than removing.

3.3.13 Replacement of the pressure relief valve

1 Remove the relief valve unscrewing the valve
with a spanner.
2 When reassembling after replacing the relief
valve, proceed in the reverse order than remov-
ing. Use Teflon tape on the thread to avoid any
leakage.

3.3.14 Replacement of the sight glass

To remove the sight glass proceed as follows:
1 Remove the brazed parts using a blowtorch and
previously cooling the pipe side and the sight
glass with wet cloth in order to avoid brazing
material enter inside the pipes.
2 When reassembling after replacing the sight
glass, perform the procedure in the reverse or-
der than removing.

3.3.15 Replacement of the stop valve (x3)

There are 3 stop valves located along the refrigerant cycle: 2 are located close the expansion valves and 1 is located at the
filter drier, as shown in the pictures below.
At expansion valves
stop valve with a spanner. Remove and replace the stop valve. Use Teflon tape to seal the thread and avoid any leakage.
74
SMGB0097 rev.0 - 07/2015
Stop valve (x3)
At filter drier
Pressure sensor
(PS)
Relief valve
Brazed parts
Sight glass
To replace the stop valves, unscrew the