WARNING
R410A Refrigerant under Higher Pressure than R22!
The units described in this manual use R410A refrigerant which operates at 50 to 70% higher
pressures than R-22. Use only R-410A approved service equipment. Refrigerant cylinders are
painted with "pink" color to indicate the type of refrigerant and may contain a "dip" tube to
allow for charging of liquid refrigerant into the system. For specific handling concerns with R-
410A, please contact your local Trane representative. Failure to use R-410A approved service
equipment could result in standard equipment exploding under R-410A higher pressure which
could result in death or serious injury.
NOTICE:
Use PVE Oil with R-410A Mini-Split Units!
All R-410A mini-splits use a PVE oil (Polyvinyl Ether Oil) that readily absorbs moisture from the
atmosphere. To limit this “hygroscopic” action, the system should remain sealed whenever
possible. If a system has been open to the atmosphere for more than 4 hours, the compressor oil
must be replaced. Never break a vacuum with air and always change the driers when opening
the system for component replacement. For specific handling concerns with PVE oil, contact
your local Trane representative.
USE ONLY THE FACTORY RECOMMENDED - DAFNE HERMETIC OIL FV50S - for servicing these
units.
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