
2. Preparation for installation
46
Problem analysis
R22 gauge was used in R410a system.
Consequence
If you use R22 gauge, remaining oil inside can generate
wax type material which definitely badly affect POE oil of
R410a system, possibly clogging refrigerant passage or
causing compressor failure.
Standard procedure
Never utilize R22 gauge for R410a system to prevent
the mineral oil from flowing in to the R410a system.
Use the measuring instruments that meets the standard
requirement.
High pressure side : -0.1 ~ 5.3MPa
Low pressure side : -0.1 ~ 3.8MPa
Proper method
Install in accordance with the standards.
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