Installing A Fan Tray In An Ex8208 Switch - Juniper EX8208 Hardware Manual

Installing a Fan Tray in an EX8208 Switch

An EX8208 switch has a single, field-replaceable 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 vertically on the left side on the front of the chassis. A handle on the front faceplate
facilitates handling of the fan tray. There is a spring-loaded latch on the base of the fan tray that is used
to latch the fan tray into the chassis.
Before you begin to install a fan tray:
Ensure you understand how to prevent ESD damage. See
on page 381.
Ensure that you have the following parts and tools available to install a fan tray in an EX8208 switch:
Electrostatic discharge (ESD) grounding strap
CAUTION:
However, the fan tray must be replaced within 2 minutes of removing the fan tray to
prevent the chassis from overheating.
To install a fan tray in an EX8208 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 handle of the fan tray with one hand and support the weight of the tray with the other hand.
Align the tray with the fan tray guides on the fan tray slot. Slide in the fan tray until it is fully seated in
the chassis.
You will hear a distinct click sound when the spring-loaded latch locks into the corresponding hole on
the strike plate below the fan tray. The latch must be fully engaged in the corresponding hole for the
fan tray to be securely installed.
The fan tray can be removed and replaced while the switch is operating.
Figure 67 on page
"Prevention of Electrostatic Discharge Damage"
238):
237