10-148 A/C system 10. A/C and Safety System 10.1.12.13 Recover/add compressor oil Note: – Before charging the refrigerant, the A/C system shall be vacuumed. – Refrigerant charging shall be carried out after the replenishment of the lubricating oil into the A/C compressor. 1. Drain the compressor lubricating oil. a. Connect the high and low pressure lines of the cooling circuit. b. Open the low pressure valve switch ① and high pressure valve switch ② of the equipment. c. Open the oil discharge valve on the control panel of the A/C refrigerant filling machine, and start the equipment to check whether the A/C compressor lubricating oil is discharged into the collection bottle. d.
After the discharging of the A/C compressor lubricating oil is completed, stop the oil discharge and close the oil discharge valve. e. Check the collection bottle and record the oil amount. 2. Replenish the compressor lubricating oil. Note: – Only add the compressor oil after vacuuming. Refit the filling bottle and add the compressor lubricating oil as standard – Connect the high and low pressure pipelines of the refrigeration circuit, open the high pressure valve of the equipment and the lubricating oil filling switch of the compressor. – Start the A/C refrigerant filling machine and observe the oil level in the filling bottle until it reaches the required level.
– Close the high pressure valve. VOYAH FREE