Installing A Fan Tray In An Ex4500 Switch - Juniper EX4500 Hardware Manual

Installing a Fan Tray in an EX4500 Switch

An EX4500 switch has a single fan tray. The fan tray is a hot-insertable and hot-removable field-replaceable
unit (FRU); you can remove and replace the fan tray while the switch is running without turning off power
to the switch or disrupting switching functions.
The fan tray installs horizontally on the rear of the chassis. Handles on each side of the front faceplate
facilitate handling of the fan tray.
Before you begin to install a fan tray:
Ensure you understand how to prevent ESD damage. See
on page 305.
Ensure that you have the following parts and tools available to install a fan tray in the switch:
Electrostatic discharge (ESD) grounding strap
CAUTION:
However, the fan tray must be replaced within 30 seconds of removing the fan tray
to prevent the chassis from overheating.
To install a fan tray in an EX4500 switch (see
1. Attach the electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strap to
the ESD point on the chassis.
2. Hold the handles of the fan tray and align the tray with the fan tray guides on the fan tray slot.
NOTE: Ensure that the power supply labels, 1 and 0, are on the left side corners of the fan
tray.
3. Slide in the fan tray until it is fully seated in the chassis.
The fan tray can be removed and replaced while the switch is operating.
Figure 52 on page
"Prevention of Electrostatic Discharge Damage"
193):
192