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Figure 21: Location of Top Fan Tray
g050101
Top fan tray
(behind door)
Rear cards 0–7
Wiring tray 1
Grounding points (below wiring trays)
Power supplies 0–5
Wiring
tray 0
ESD point
Control Board 0
Control Board 1
The chassis continues to operate for a limited time (2 minutes) after a fan tray has been
removed.
CAUTION:
You must replace a fan tray within 2 minutes of removing it.
The chassis has front-to-back airflow. The air intake to cool the front card cage and
power supplies is located on the front bottom of the chassis. Cool air is pulled into the
chassis and is pushed through the front card cage toward the rear fan tray. Hot air exhausts
from the upper rear of the chassis. See the side view in
for this
airflow.
The same air intake directs cool air to the power supplies and wiring trays. The hot air
passes through the power supplies and wiring trays and exhausts on the rear of the
chassis at the bottom. See the side view in
for this airflow.
Copyright © 2012, Juniper Networks, Inc.
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QFX3000 Hardware Documentation
Summary of Contents for QFabric QFX3008-I
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