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23
4.7 Equipment Layout
The lateral, circular flow of cooling air permits arranging equipment as required for stability if the
XDF is filled or nearly filled with equipment. Install heavier equipment first, placing it in the lower
racks of the XDF. This keeps the XDF from having a high center of gravity, which could make it eas-
ier to tip over (see Figure 20).
The XDF may be filled to capacity as long as the maximum heat load of 14kW is not exceeded. If the
XDF will not be filled with equipment, the equipment should be installed with a 1U space above and
below each unit. Again, install heavier equipment first, placing it in the bottom racks.
After all equipment has been installed, any remaining spaces larger than 5U at the top of the XDF
should be closed with optional blanking panels. (Panels are available in 1U, 2U, 3U, 4U, 5U and 10U.)
This arrangement prevents large, open expanses in the equipment compartment that would reduce
cooling efficiency by channeling airflow around the electronic gear.
Figure 20 Recommended equipment arrangement
!
WARNING
Risk of electric shock. Can cause injury or death.
Disconnect all local and remote electric power before working within and/or installing
equipment.
Before installing or rearranging equipment, ensure the equipment and the UPS are switched
off. Ensure that all electrical sources are disconnected.
!
CAUTION
Risk of top-heavy unit falling over. Can cause death, injury and equipment damage.
Read all of the following instructions before attempting to move, lift or remove packaging
from the unit.
NOTE
All electrical receptacles and sockets in the vicinity of where the XDF will be used must be
ground/earth type.
RECOMMENDED SPACING
Regular spacing of equipment 1U
apart and blanking panels
enhance cooling air distribution.
Heavier equipment at bottom
promotes stability
INEFFICIENT SPACING
Irregular equipment spacing
prevents proper airflow for cooling.
Heavier equipment too high for
best stability
Large expanses
channel airflow
around equipment
Blanking Panels
in empty spaces
larger than 5U
Equipment
spaced 1U
apart