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Precautions for Installation in Different Ventilation Modes
6.3
Ventilation Mode D: Air Inlet from Front and Air Outlet from Rear
When the air is exhausted from the rear side of a cabinet, you must check the air filters and
windproof sponges on the rear door of the cabinet. If the air filters and windproof sponges are
abnormal, the heat dissipation channel may be blocked and the device may be faulty due to high
temperature.
Removed air filters
and windproof
sponges
NOTE
• To install a U32 enhanced subrack of ventilation mode D (air inlet from front and air outlet
from rear) in an A66B cabinet, type-A multi-purpose fiber management cabinets do not
need to be installed.
• For details about how to install the A66B cabinet of the U32 enhanced subrack, see the
A66B Cabinet Quick Installation Guide. To prevent the air deflector of the subrack from
blocking the bolt installation, remove the air deflector at the bottom of the subrack before
installing a cabinet. After the cabinet is installed, install the air deflector in the original
area. For details, see sections "Removing the Air Deflector at the Bottom of an A66B
Cabinet" and "Installing the Air Deflector at the Bottom of an A66B Cabinet" in this
document.
• To implement ventilation mode D (air inlet from front and air outlet from rear), the air filter
and windproof sponges need to be removed from the rear door of the cabinet after the
cabinet installation. For details, see section "Removing the Air Filters and Windproof
Sponges from the Rear Door of an A66B Cabinet" in this document.
Rear door (installed
with air filters and
windproof sponges)
22
Ventilation mode D: air inlet
from front - air outlet from
rear(using an A66B cabinet)
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