supermarket refrigerated showcase » article > commercial refrigeration > R600a fluorine-free display cooler repair fault diagnosis and troubleshooting (2)
R600a fluorine-free display cooler repair fault diagnosis and troubleshooting (2)
author: supermarket refrigerated showcase category: commercial refrigeration Views: 518Time: 2016-08-22
R600a fluorine-free display cooler repair fault diagnosis and troubleshooting (2)
The operating procedure is as follows: ①Use a wire pliers to break off the process tube seal welds to drain the refrigerant ;
② display cooler The compressor is energized and run for 30 minutes-60 minutes;
③Use a wire pliers to break off the compressor process tube to seal the weld, use a pipe knife to cut the nozzle of the ultrasonic welding of the process tube, and then use a pipe knife to cut the process tube, And shake or knock the compressor shell to discharge R600a refrigerant;
④ After the R600a refrigerant is discharged, cut the capillary tube and blow the compressor process tube with 0.4MPa nitrogen for 30 seconds, then wait 5 minutes before using nitrogen Blow for 30 seconds. The replacement of
compressors must use R600a compressors with the same or similar power. The treatment of the original compressor is as follows: After the R600a is discharged, cut the exhaust pipe and the return pipe with a pipe knife, blow out the remaining R600a in the compressor with nitrogen, then remove the compressor, and seal the compressor pipe ports it is good. The mouth is welded and sealed.
system welding blockage treatment When the refrigeration pipeline is blocked by welding and the refrigerant accumulates in a certain part and cannot be discharged, be sure to use a pipe knife to cut the pipe and discharge R600a. Never use a welding torch to open the pipe, where the R600a gas remains Mainly in filter driers, capillary tubes, and compressors.
After the system is overhauled and confirmed that there is no R600a refrigerant remaining in the system, the system can be overhauled in accordance with normal leak detection, leak repair and replacement of compressors and filters. After the overhaul, the refrigeration parts of the display cooler are welded, leaked, and the refrigeration system is purged with nitrogen.
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