Installation
112
Items Maximum allowable length
Outdoor unit models
AC090MXADKH
AC100MXADKH
AC100MXADNH
AC120MXADKH
AC120MXADNH
AC140MXADKH
AC140MXADNH
Main pipe (L1) 50 m 75 m
Max. height difference
between outdoor and
indoor units (h1)
30 m 30 m
• Temper grade and minimum thickness of the refrigerant pipe
Outer diameter [mm] Minimum thickness [mm] Temper grade
ø6.35 0.7
C1220T-O
ø9.52 0.7
ø12.70 0.8
ø15.88 1.0
ø15.88 0.8
C1220T-1/2H OR
C1220T-H
ø19.05 0.9
ø22.23 0.9
CAUTION
• Be sure to use C1220T-1/2H (Semi-hard) pipe for more than Ø19.05 mm.
If you use C1220T-O (Soft) pipe for Ø19.05 mm, the pipe may be broken,
which can result in an injury.
Make at least one round:
It will reduce noise and vibration
• The appearance of the unit may be different from the diagram depending
on the model.
CAUTION
• After connecting the pipes with knock-out treatment, plug the space
around the pipes.
• After connecting the pipes, proceed exactly as directed in the guide to
prevent interference with the internal parts.
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