NEC QX-S6648XP-6Q Installation Manual page 136

Installation Guide
QX-S6600 Series Ethernet Switches
11 Appendix D Cooling system
The cooling system of the QX-S6600 Series comprises the ventilation holes in the chassis,
fan trays, and built-in fans of hot swappable power modules. To guarantee that this cooling
system can effectively work, you must consider the site ventilation design when you plan
the installation site for the switches.
QX-S6600 Series cooling system
A fan of QX-S6600 series has one for QX-S6632QP and another for QX-S6648XP-6Q and
QX-S6648XT-6Q.
The fan trays in QX-S6648XP-6Q and QX-S6648XT-6Q must be the same type:
LSPM5FANSA or LSPM5FANSB.
The fan trays in QX-S6632QP must be the same type: LSWM3HFANSC or
LSWM3HFANSCB.
When LSPM5FANSA/LSWM3HFANSC fan trays are used, cool air flows in through

the air vents in the fan tray panel and the power module panels, circulates through the
chassis and the power modules, and exhausts at the network port side, as shown in
Figure 11-1.
When LSPM5FANSB/LSWM3HFANSCB fan trays are used, cool air flows in through

the air vents in the network port-side panel and the power module panels, circulates
through the chassis and the power modules, and exhausts through the air vents in the
fan tray panels, as shown in Figure 11-2.
11-1
11 Appendix D Cooling system