Recovered refrigerant may be reused in the same system from which it was removed or it may be removed from the site and processed for use in another system depending upon the reason for its removal and its condition, i.e the level and types of contaminants.
There are many potential hazards in recover of refrigerant are acids, moisture, high boling residues and other particulate matter. Even low levels of these contaminants can refrigrant should be checked before reuse.
Refrigerant from a unit with a burnt-out hermetic compressor is reusable providing it has been recovered with a recovery unit incorporating an oil separator and filters. To check the acid content of any reclaimed oil it is necessary to use a refrigeration-oil-test-kit. Usually it is only a matter of filling a test bottle with the oil to be tested and mixing it with the twst liquid inside If result shows purple: oil is safe. If liguid turns yellow this would show the oil is acidic-and refrigerant/oil should not be used in system. Such material should be sent for reclamation or destruction
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