Juniper EX4550 - Chapter 16 Replacing Cooling System Component; Installing a Fan Module in an EX4550 Switch

CHAPTER 16
Replacing Cooling System Component
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Installing a Fan Module in an EX4550 Switch on page 199
•
Removing a Fan Module from an EX4550 Switch on page 200
Installing a Fan Module in an EX4550 Switch
Each fan module is a hot-removable and hot-insertable field-replaceable unit (FRU)
installed in the rear panel of the switch: You can remove and replace it without powering
off the switch or disrupting switch functions.
Before you install a fan module in the switch:
•
Ensure you understand how to prevent electrostatic discharge (ESD) damage. See
“Prevention of Electrostatic Discharge Damage” on page 287.
•
Ensure that you have the correct fan module. The label AIR IN (AFI) or AIR OUT (AFO)
on the fan module must match the label AFI or AFO on the installed power supply.
Ensure that you have the following parts and tools available to install a fan module in
the switch chassis:
•
ESD grounding strap
•
Phillips (+) screwdriver, number 2
To install a fan module in the switch (see Figure 55 on page 200):
1. Attach the ESD grounding strap to your bare wrist, and connect the strap to the ESD
point on the chassis.
2. Remove the fan module from its bag.
3. Hold the handle of the fan module with one hand and support the weight of the module
with the other hand. Place the fan module in the fan module slot on the rear panel of
the switch and slide it in until it is fully seated.
4. Tighten the screw on the fan module by using the screwdriver.
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