H3C Technologies H3C S5560 Series Switches - Manual (Page 92)

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Appendix D Cooling system
The cooling system of the switch includes the air vents in the chassis, fan trays, and built-in fans of hot
swappable power modules. For correct operation of this cooling system, you must consider the site
ventilation design when you plan the installation site for the switch.
Cooling system of the S5560-EI switches (excluding the
S5560-30S-EI and S5560-54S-EI switches)
The LSPM1FANSA and LSPM1FANSB fan trays are available for all S5560-EI switches except the
S5560-30S-EI and S5560-54S-EI switches.
• When the LSPM1FANSA fan tray is used, ambient air flows in through the air vents in the fan tray
panels, circulates through the chassis and the power modules, and exhausts through the air vents in
the port side panel and the power module panels, as shown in Figure 77 and Figure 78 .
• When the LSPM1FANSB fan tray is used, ambient air flows in through the air vents in the port-side
panel, circulates through the chassis and the power modules, and exhausts through the air vents in
the fan tray and power module panels, as shown in Figure 79 and Figure 80 .
Figure 77 Airflow through the S5560-30C-EI switch chassis with the LSPM1FANSA fan tray
(1) Power module air vents (2) Fan tray air vents
(3) Air vents in the switch side (4) Port side air vents