How to Add Refrigeration Oil?

[AndersonDella]

Refrigeration oil is added by the following method: 1. First, evacuate the refrigeration system; 2. Select a graduated measuring cup and add the required amount of refrigeration lubricating oil; 3. Connect the manifold gauge to the air conditioning system, remove the low-pressure hose from the gauge set and immerse it in the refrigeration oil, while keeping the high-pressure hose connected to the high-pressure service valve and the center hose connected to the vacuum pump; 4. Start the vacuum pump and open the high-pressure manual valve; 5. Then, evacuate the refrigeration system again and add refrigerant. Refrigeration oil is used to lubricate the moving parts inside the refrigeration compressor. According to the standards of the Petrochemical Industry Department, refrigeration oils produced in China are available in five grades: No. 13, No. 18, No. 25, No. 30, and No. 40 (enterprise standard).