Subaru Legacy 2003 Service Manual page 3447

REFRIGERANT CHARGING PROCEDURE
HVAC SYSTEM (HEATER, VENTILATOR AND A/C)
22) Set up the vehicle to the following status:
• A/C switch ON
• Engine running at 1,500 rpm
• Blower speed setting to "Hi"
• Temperature setting to "MAX COOL"
• Air inlet setting to "RECIRC"
• Window open
23) Open the low-pressure valve and charge the
specified amount of refrigerant.
24) Close all valves and disconnect the hoses from
service port after charging the refrigerant.
25) Install the cap to service port.
AC-26