icetro WU-0100A, Technician'S Handbook

Page: 137 / 166

4. Recovered refrigerant must come from a
“contaminant-free” system. To decide whether the
system is contaminant free, consider:
• Type(s) of previous failure(s)
• Whether the system was cleaned, evacuated and
recharged properly following failure(s)
• Whether the system has been contaminated by
this failure
• Compressor motor burnouts and improper past
service prevent refrigerant re-use.
• Refer to page 145 to test for contamination.
5. “Substitute” or “Alternative” Refrigerant
• No substitute or alternative refrigerants are
allowed without expressed, written approval
from Icetro America.
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