Impreza 2.5 RS Sedan AWD F4-2.5L SOHC (2002)
11. When a 13.6 kg (30 lb) refrigerant container is used, measure the refrigerant amount in use using a weight scale.
12. Confirm that all the 3 hoses are tightly connected to the manifold gauge set.
13. Open the valve on the HFC-134a source.
14. Loosen the center hose connection on the manifold gauge set (if applicable, press a purge valve on the manifold gauge set) only for a couple of
seconds to allow the air in the center hose to escape by the refrigerant.
15. Carefully open the high-pressure valve with the engine stopping.
CAUTION: Do not open the low-pressure valve.
CAUTION: Never run the engine during charging from the high-pressure side.
16. Close the high-pressure valve when the low-pressure gauge reaches 98 kPa (1 kg/sq.cm, 14 psi). Using a leak tester, check the system for leaks. If
any leakage is found after the refrigerant recovery is completed, repair the applicable area.
17. After confirming that there are no leaks with the leak test, charge the required amount of refrigerant.
CAUTION: Never run the engine during charging from the high-pressure side.