Dell Force10 S60-44T Installing the S60 System - Page 31

5 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 Force10 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. You can order replacement fan filter kits from Dell Force10. 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. Components • S60 Fan module (Catalog# S60-FAN) • S60 Fan module - Reverse flow (Catalog# S60-FAN-R) • S60 Fan filter (Catalog# S60-PWR-FLTR) • The fan filters are used on the reverse flow (R) fan modules only. Fans and Filters | 31