Ex4500 Cooling System; Fan Tray - Juniper EX4500 Hardware Manual

EX4500 Cooling System

IN THIS SECTION

Fan Tray | 54

Airfow Direction in EX4500 Switch Models | 55
Front-to-Back Airflow | 55
Back-to-Front Airflow | 56
The cooling system in an EX4500 switch consists of a single fan tray.
Fan Tray
The fan tray is a hot-insertable and hot-removable field-replaceable unit (FRU). The fan tray contains five
fans (see Figure 18 on page
Figure 18: Fan Tray Used in an EX4500 Switch
Fan tray handles
The fan tray installs horizontally in the rear of the chassis. The fan tray has two handles, one on each side
that facilitate handling of the fan tray.
You remove and replace the fan tray from the rear of the chassis. The switch continues to operate for a
limited time (30 seconds) during the replacement of the fan tray without thermal shutdown.
The fan tray provides front-to-back or back-to-front airflow depending on the switch model you purchase.
54).
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