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NEC QX-S5500G Series - Page 159

NEC QX-S5500G Series
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Installation Guide
QX-S5500G Series Ethernet Switches
11. Appendix D Cooling system
11-1
11. 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.
11.1 Cooling system of the QX-S5524GT-4X1C,
QX-S5548GT-4X1C, and QX-S5524GP-4X1C
The LSPM5FANSA, or LSPM5FANSB fan trays are available for the QX-S5524GT-4X1C,
QX-S5548GT-4X1C, and QX-S5524GP-4X1C. The type of which the switch is, needs two.
When the LSPM5FANSA 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 11-1.
When the LSPM5FANSB 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 11-2.

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