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Refrigerant pipe processing
Apply proper torque to flare nuts.
• Store the piping to be used during the installation indoors, and keep both ends of the piping sealed until
just before brazing.
• If dust, dirt or water gets into the refrigerant cycle, the oil will deteriorate and the compressor may fail.
• Use refrigerant oil to coat flares and flange connections before connecting.
• The refrigerant used in the unit is highly hydroscopic and mixes with water which will degrade the
refrigerant oil.
Specifications are subject to change without notice.
PAA-A18, 24, 30, 36, 42AA1/BA1/CA1
60
CAUTION
Never use existing
refrigerant piping.
The large amount
of contaminants in
other refrigerants
and refrigerant oil
in the existing
piping will cause the
new refrigerant to
deteriorate.
© 2022 Mitsubishi Electric US, Inc.
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