Appendix C: Field-Replaceable Units
7750 SR-a4 and SR-a8 Installation Guide 189
Removing and Replacing an Air Filter
The procedures in this section apply to the following air filters:
• SR-a4 air filter for the 7750 SR-a4 5-RU chassis
• SR-a8 air filter for the 7750 SR-a8 7-RU chassis
Where figures in this section only show the air filter that is used in the 7750 SR-a4 chassis,
the figures also apply to the 7750 SR-a8 chassis.
This section includes information about:
• Air Filter Routine Maintenance on page 189
• Removing the Air Filter on page 189
• Replacing the Air Filter on page 190
Air Filter Routine Maintenance
The air filter has two parts: a reusable metal carrier, and a replaceable filter. The filter is
designed to snap into the carrier, and has a polarity tab. Replacement filter units can be
ordered separately from Alcatel-Lucent. Filter replacements are individually bagged, five to
a box.
Alcatel-Lucent recommends that you inspect the air filter monthly. If dirt and dust
accumulation are found, replace the air filter.
Removing the Air Filter
Figure 68 shows how to remove the air filter from the 7750 SR-a4 chassis. Table 96 describes
the features. The same method applies to the air filter in the 7750 SR-a8 chassis.
Note: Each replacement filter is packaged in an oversized plastic bag to allow the dirty filter
to be placed in the bag for disposal without releasing the dust.
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