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HEATING, VENTILATION AND AIR CONDITIONING (HVAC) 1A–81 7. Evacuate and recharge with the proper amount of refrigerant. 8. Perform the oil return operation. 9. Remove the compressor and recheck the amount of oil. 10. Adjust the compressor oil, if necessary. Checking and Adjusting for 150 cc (5.0 fl.oz.) of oil is charged in compressor 1. Perform oil return operation. 2. Discharge and recover the refrigerant and remove the compressor. 3. Drain the compressor oil and measure the extracted oil. 4. Check the compressor oil for contamination. 5. Adjust the oil level as required. 6. Evacuate, charge and perform the oil return operation. 7. Check the system operation. Contamination of Compressor Oil Unlike engine oil, no cleaning agent is added to the Inspect the extracted oil for any of the following • The capacity of the oil has increased. • The oil has changed to red. • Foreign substances, metal powder, etc., are present in the oil. If any of these conditions exists, the compressor oil Oil Return Operation There is close affinity between the oil and the 1. Open all the doors and the engine hood. 2. Start the engine and air conditioning switch to “ON" and set the fan control knob at its highest position. 3. Run the compressor for more than 20 minutes between 800 and 1,000 rpm in order to operate the 4. Stop the engine. Replacement of Component Parts When replacing the system component parts, supply (Collected Amount) (Charging Amount) more than 90 cc (3.0 fl.oz) same as collected amount less than 90 cc (3.0 fl.oz) 90 cc (3.0 fl.oz) (Amount of oil drained (Draining amount of oil less than 90 cc (3.0 fl.oz) Same as drained amount more than 90 cc (3.0 fl.oz) 90 cc (3.0 fl.oz) (Component parts to be (Amount of Oil) Evaporator 50 cc (1.7 fl. oz.) Condenser 30 cc (1.0 fl. oz.) Receiver/dryer 30 cc (1.0 fl. oz.) Refrigerant line (one 10 cc (0.3 fl. oz.) |