Refrigerant replacement in the refrigerator: what went wrong?

Refrigerant replacement in the freezer. Replaced r22 with r12, and there seemed to be no circulation: the capillary was apparently blocked. How to fix? Out of the filter there is, checked.

Peter

Specialist's answer

The reasons for clogging up the capillary tube are many and each of them requires a different technique. Basically, the tube is clogged with decomposition products of mineral oil in the compressor. Sometimes, the material of the filter-dryer can be destroyed and its particles enter the capillary. You can also find the consequences of charging the system with a poor-quality refrigerant, when it contains undesirable components and a situation similar to the first two cases occurs.

The most radical method is the complete replacement of a capillary tube. Here we must assume that the flow area of ​​the tube and its length must exactly match the original, installed from the factory, otherwise it will be impossible to achieve proper operation of the unit.

A proven technique is to force a blockage in a tube using dried oil for the autocorder. As a supercharger, a converted automobile hydraulic jack is used.

The use of compressed air is inefficient because the air is not able to remove the tar formation from the channel. The use of any type of solvent, such as acetone or alcohol, can be recommended only if it is completely removed from the capillary after the cleaning process.

Many experts are of the opinion that to clean the capillary tube it is necessary to use special flushing refrigerants, which in a certain proportion are added to the original refrigerant, but, as a rule, this technique is based on the fact that the added additives simply reduce the fluidity of freon and are able to work with smaller sections capillary. Of course, this cannot be a solution.