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Mechanical Considerations
10
4.2.1 Airflow Direction
If the Liebert XDH is installed at the end of a row, Liebert recommends using uni-directional air dif-
fusers. The uni-directional diffusers are designed to blow cooling air to the left; the diffusers can be
used for right air discharge by removing them from the Liebert XDH, turning them 180 degrees, then
reattaching them to the Liebert XDH.
If the Liebert XDH is installed between racks, Liebert recommends using bi-directional air diffusers.
These diffusers blow air right and left, as well as to the front.
Two diffusers were shipped with the Liebert XDH. If uni-directional diffusers were ordered, the dif-
fuser with the part number 186458 is designed for installation on the upper half of the Liebert XDH.
The other diffuser, for use on the lower half of the Liebert XDH, has the part number 186459. When
installed in these positions, the diffusers will direct the airflow to the left.
If directing the airflow in the opposite direction would improve cooling, the diffusers may be switched.
See Install Air Diffusers for Best Airflow Direction on page 11.
Figure 9 Liebert XDH placement in enclosure row
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Aisle
Cold
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Cold
Aisle
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D
H
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