Juniper EX Series Instruction Manual

Installing a Fan Tray in an EX-series Switch
EX-series switches have a single field-replaceable unit (FRU) fan tray on the rear
panel. The fan tray is hot-removable and hot-insertable FRU: you can remove and
replace it while the switch is functioning without turning off power to the switch or
disrupting switch functions.
Ensure you have the following tools and parts available to install a fan tray in an
EX-series switch chassis:
■Electrostatic discharge (ESD) grounding strap
■Phillips (+) screwdriver, number 2
Ensure you understand how to prevent ESD damage (see Preventing Electrostatic
Discharge Damage).
To install a fan tray in an EX-series switch chassis (see Figure 1 on page 1 and
Figure 2 on page 2):
1. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and
connect the strap to the ESD point on the chassis.
CAUTION: If you are installing a fan tray in an EX 3200 switch, ensure the fan faces
upwards. If you are installing a fan tray in an EX 4200 switch, ensure the fans face
downwards.
2. Remove the fan tray from its bag. Using both hands, align the tray with the fan
tray guides on the fan tray slot on the rear panel of the chassis and slide it in
until it is fully seated.
3. Tighten the screw or screws on the fan tray by using a Phillips (+) screwdriver,
number 2.
Figure 1: Installing a Fan Tray in an EX 3200 Switch
Installing a Fan Tray in an EX-series Switch ■1

Figure 2: Installing a Fan Tray in an EX 4200 Switch
Related Topics
■Removing a Fan Tray from an EX-series Switch
■Installing and Removing EX-series Switch Hardware Components
■Cooling System in an EX 3200 Switch
■Cooling System in an EX 4200 Switch
■Field-Replaceable Units in EX-series Switches
■EX 3200 Switch—Rear-Panel Description
■EX 4200 Switch—Rear-Panel Description
2■Related Topics