Recovering The Refrigerant; Replacement Of The Cooler - Hitachi SAMURAI Series Service Manual

3. Servicing
Cycle components

3.3.3 Recovering the refrigerant

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With a vacuum pump
a. Make sure that the system is powered off.
b. Completely close the stop valve.
c. Connect the vacuum pump system to the check joints of the refrigerant line.
d. Check for any leakage at the flare nuts connections.
e. Operate the vacuum pump for 1 or 2 hours, or until the pressure decreases lower than a pressure of 756 mmHg in
vacuum.
f. Use a scale to take note of the quantity of refrigerant charged into the tank in order to provide the same quantity
when charging the circuit.
Vacuum pump

3.3.4 Replacement of the cooler

1 Unscrew the 4 screw of the refrigerant inlet pipe
flange and the 4 screws of the outlet refrigerant
pipe flange.
Flange plate
Nut
68
SMGB0097 rev.0 - 07/2015
Recovery tank
Manifold gauge
Bolt
Spring washer
Flat washer
Gasket
Spring washer
Scale
Outlet pipe flange
4 Screws
Inlet pipe flange 4
Screws
RCME-CLH unit
Cooler