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Fans and Filters
The S60 system comes from the factory with one Power Supply Unit (PSU) and one fan module installed in the system (
Figure 5-1 ). If a second (redundant) PSU is installed and running, both the fan module and
the integrated fan/PSU are hot-swappable. With redundant PSUs, if you remove a fan module, traffic is not interrupted.
WARNING: To run the system, both slots must have operating fan units. If a module is not installed in each slot (either as part of the PSU or as an independent fan module), the system powers down when it exceeds an internal temperature threshold.
WARNING: Dell Networking recommends replacing the fan tray within five minutes. If the fan tray is left out for too long, the system may experience traffic disruption.
The S60 system supports two airflow direction options (normal and reverse). Do not mix fan airflow types; you can only use a single airflow direction in a system. If the airflow directions are mismatched, the system powers down in one minute.
• Normal—airflow is from the Input/Output (I/O) panel to the PSU
• Reverse—airflow is from the PSU to the I/O panel
Environmental factors can decrease the amount of time required between air filter replacements. Check the environmental factors regularly. An increase in temperature and/or particulate matter in the air might affect performance (for example, new equipment installation).
CAUTION: Check the fan air filters at six-month intervals and replace them as necessary. In order to accurately determine air filter replacement intervals, regularly monitor the speeds of the cooling fans. An increase in overall fan speed may indicate a clogged filter.
You must replace the S60 fan filters with new filters; you cannot clean and reuse the fan filters.
Replacement filters can be sourced online through third-party component suppliers. The fan filter is manufactured by Qualtek Electronics Corporation and is stocked at several different online electronics supply sites. The Qualtek part number is 09150-M/30 (on some sites the part number is referenced as
09150-M30), and provides conformance to the following standards as per the NEBS GR-63-CORE specification:
• Minimum dust arrestance of 65%, per ASHRAE Standard 52.1-1992
OR
• Minimum Efficiency Rating Value (MERV) of 2, per ANSI/ASHRAE Standard 52.2-2007
Dell Networking does not recommend any one site to procure these filters, but you can find a link on the filter manufacturer’s site (http://www.qualtekusa.com) that displays a list of distributors and their current stock. Select Catalog > Fan_Accessories then scroll to part “09150-M/30*.” Click the check mark in the
Distributor Stock Check column. A list of distributors and their reported inventory displays.
CAUTION: For Network Equipment Building System (NEBS)-compliance, use the NEBS-approved filters.
These filters are colored green and are installed exactly the same as the non-NEBS filters.
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Components
• S60 Fan module
• S60 Fan module - Reverse flow
• S60 Fan filter
• The fan filters are used on the reverse flow (R) fan modules only.
Figure 5-1.
The S60 Fan Module
Securing Screw
Fans and Filters
PSU0
Fan Module1
Grab Handle
Module slot 0 is on the left side of the system; module slot 1 is on the right side of the system.
Install a Fan Module
The fan modules in the S60 are field replaceable. The PSUs are in a single piece with the fans. For the procedure to replace the entire PSU, refer to
Chapter 4, Power Supplies .
To install a fan module, follow these steps:
Step
1
2
3
Task
Take the fan module out of the shipping box.
Use the grab handle to slide the fan module into the bay.
Tighten the securing screw at the top of the fan module.
Replace a Fan Module
Dell Networking recommends replacing the fan tray within five minutes. If the fan tray is left out for too long, the system may experience traffic disruption.
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2
3
4
Error messages appear when the fan tray is removed and when the temperature approaches the threshold.
• When a fan tray is removed, the system displays the following message:
00:00:37: %STKUNIT0-M:CP %CHMGR-2-FAN_TRAY_BAD: Major alarm: fan tray 0 in unit 0 is missing or down
• When the temperature reaches the maximum threshold (3), the system displays the following warning message:
00:00:38: %STKUNIT0-M:CP %CHMGR-2-TEMP_SHUTDOWN_WARN: WARNING! Unit 0 temperature is current temp;
To replace a fan module, follow these steps:
Step
1
Task
Loosen the securing screw at the top of the fan module.
CAUTION:
You must complete steps 2 and 3 within five minutes or the system powers down. If a fan module is not installed in each slot (either as part of the PSU or as an independent fan module), the system powers down when it exceeds an internal temperature threshold.
Use the grab handle to slide the fan module out of the bay.
Use the grab handle on the replacement fan module to slide it into the bay.
Tighten the captive screws on the replacement fan module. Ensure the fan module is secure.
Install a Fan Filter
Use the fan filters with the reverse (R) flow fan modules and PSU/fan modules only. You can replace them individually on each fan within the module without powering down a PSU module or disrupting traffic.
The fan filters and retainers pop into the fan guards on the module. There is no need to unscrew the filter guard.
To install a fan filter, follow these steps:
Step
1
2
3
4
Task
Using your fingernail, gently pry the filter retainer off the filter guard.
Remove the filter.
Replace the filter and ensure it is pressed firmly into place. Gently press the filter retainer into the filter guard until it snaps in.
Repeat for all the fan filters, if necessary.
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