Cooling System Components And Descriptions; Mx960 Cooling System Description - Juniper MX960 Hardware Manual

CHAPTER 3

Cooling System Components and Descriptions

IN THIS CHAPTER

MX960 Cooling System Description | 25

MX960 Fan LED | 27
MX960 Cooling System Description
The cooling system consists of the following components:
Upper front fan tray
Lower front fan tray
Front air filter
The cooling system components work together to keep all router components within the acceptable
temperature range (see
Figure 15 on page 27). The router has two fan trays located in the front of the router that install horizontally
above and below the card cage. Each normal-capacity fan tray contains six fans. High-capacity fan trays
that contain twelve fans can be installed in the upper and lower fan tray slots. The fan trays are
hot-insertable and hot-removable.
The MX960 requires high-capacity fan trays to satisfy cooling requirements for high-density DPCs and
MPCs. When replacing normal-capacity fan trays with high-capacity fan trays, you must replace them in
both the upper and lower fan trays. Additionally, you must replace the front normal air filter tray with a
high capacity filter tray and air filter.
There is a single air intake in the front of the router. Air is pushed up through the card cage and through
the upper fan tray where it is exhausted out the upper rear of the system through the larger air exhaust
shown in Figure 12 on page
At the bottom rear of the chassis, there is an air intake for power supply cooling. Air flows over the power
supplies and is exhausted out the rear of the chassis through the smaller air exhaust below the main
exhaust.
Figure 12 on page 26, Figure 13 on page
26.
26, Figure 14 on page 26, and
25