Outdoor Unit Installation Guidelines
Selecting a Location for Installation of the Indoor Units
● The maximum allowable length of refrigerant piping, and the maximum allowable height difference between the
outdoor and indoor units, are listed below. (The shorter the refrigerant piping, the better the performance.
Connect so that the piping is as short as possible. Shortest allowable length per room is 9.8ft.)
If the outdoor unit is positioned higher than the indoor units. If the outdoor unit is positioned lower than
one or more of the indoor units.
Outdoor unit capacity class
Piping to each indoor unit
Total length of piping between all units
3MXS24∗, 4MXS32∗
82ft max.
230ft max.
● Where a wall or other obstacle is in the path of outdoor unit’s intake or exhaust airflow, follow the installation guidelines
below.
● For any of the below installation patterns, the wall height on the exhaust side should be 4ft or less.
Wall facing one side Walls facing two sides
Walls facing three sides
Unit: in.
Top view
More than 3-15/16
More than 13-3/4
More than 1-15/16
More than
1-15/16
More than
1-15/16
Top view
More
than
3-15/16
More than
13-3/4
More than 3-15/16
More than 13-3/4
Side view
47-1/4
or less
Level
difference:
24.6ft max.
Level
difference:
49.2ft max.
Indoor Unit
Outdoor Unit
Level
difference:
49.2ft max.
Outdoor Unit
Indoor Unit
Level
difference:
24.6ft max.
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