How does the central air conditioning screw compressor replace the freezing oil

How does the central air conditioning screw compressor replace the freezing oil Refrigerating oil, also known as lubricating oil, is mainly used for lubricating various moving parts in refrigeration compressors. It belongs to refrigeration consumable products. So, how does the central air conditioning screw compressor replace the freezing oil? Today I will teach you how to change it. I hope it will help you. 1. The central air conditioner is repaired and turned on to normal temperature for one hour; 2. Shut down; 3. Drain the oil tank, cooler and all the frozen oil in the filter; 4. Add the newly replaced refrigeration oil to 1/2 volume of the oil required for operation); 5. The central air conditioner is turned on and operated to normal operating temperature for one hour. During this hour, open and close the exhaust valve every 15 minutes to allow the machine to circulate under the high and low pressure valve settings. Foam increased on the observation window of the oil sight glass, and the initial opacification became clear; 6.Shut down; 7. Drain oil from the oil tank, cooler and all filters; 8. Add the newly replaced refrigeration oil to 1/2 volume; 9. Repeat step 5; 10. Then shut down; 11. Drain the frozen oil from the entire machine, including the cooler, oil tank and filter. If necessary, remove the pipeline to remove the low-level frozen oil. Clean the filter; replace the separator and all non-permanent oil filters. Check that the inlet filter is covered with contaminated oil and replace it if necessary; 12. Add the recommended refrigerating oil to be replaced to 1/2 volume of the oil required for operation; 13. Turn on and run to normal temperature for 15 minutes; 14. Shut down and drain the frozen oil in the machine. Remove the refrigeration filter and filter screen and replace the original filter element; 15. Add the original oil supplied by the factory to the machine to the normal oil level; 16. Restart and pay attention to the oil level. When the machine is operating, there will be about 1/2 oil in the observation window; 17. Within 2 minutes after shutdown, the foam can be dispersed to the oil level and no freezing oil flows out of the drain valve; 18. Until the central air conditioner runs normally.

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