Install Guide
Fan module installation
The fan modules are eld replaceable. Module slot 1 is on the left side of the switch; module slot 5 is on the right side of the switch.
CAUTION: DO NOT mix airow directions. All reverse or normal fans must use the same airow direction. If you mix the airow
direction, the switch detects the discrepancy, issues an alarm, and may autoshutdown to avoid heat damage to the components.
If an autoshutdown occurs, correct the mixed airow direction.
1 Take the fan module out of the shipping box.
2 Slide the module into the bay.
Figure 21. PSU and fan installation
• PSU is on the right.
• Fan unit is on the left.
Fan module replacement
1 Slide the fan module out of the bay.
2 Slide the replacement module into the bay.
Fan air lter replacement
Environmental factors can decrease the amount of time required between air lter replacements. Check the environmental factors regularly.
An increase in temperature and/or particulate matter in the air might aect performance.
CAUTION
: Check the fan air lters at six-month intervals and replace them as necessary. To accurately determine air lter
replacement intervals, regularly monitor the speeds of the cooling fans. An increase in overall fan speed may indicate a clogged
lter.
You must replace the fan air lters with new lters; you cannot clean and reuse the old fan air lters. Replacement lter media must meet
the requirements found in GR-63-CORE.
• Minimum dust arrestance of 65%, per ASHRAE Standard 52.1-1992. OR
• Minimum Eciency Rating Value (MERV) of 2, per ANSI/ASHRAE Standard 52.2-2007.
CAUTION
: For Network Equipment Building Systems (NEBS) compliance, use NEBS approved lters.
Use fan air lters with reverse blue-banded air ow switches—PSUs and fans. You can replace the air lters individually on each fan within
the switch without powering down a PSU module or disrupting trac.
Fans
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