York R-410A - Outdoor Units Are Lower than the Surrounding Obstacles

Outdoor
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More than two line of outdoor units
(7) Outdoor units are lower than the surrounding obstacles
If the outdoor units are lower than the surrounding obstacles, in order to ensure an
effective “heat exchange “a conduit is strongly recommended to help the heat emission and
avoid the discharging air being absorbed into the system again. The conduit is made on the
installation spot with the height HD=H-h.
(Note; because the outdoor fan motor have no enough static pressure, the Max. Length should
be less than 3meters.)