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

CHAPTER 4
Cooling System Components and
Descriptions

MX960 Cooling System Description

Copyright © 2017, Juniper Networks, Inc.
MX960 Cooling System Description on page 23
MX960 Fan LED on page 25
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 11 on page 24, and Figure 12 on page
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 air filter.
NOTE: If you install high-capacity fan trays, you must also install
high-capacity power supplies. Combinations of normal-capacity and
high-capacity power supplies and fan trays are not supported.
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 9 on page 24, Figure 10 on page
24). The router has two fan trays located in
Figure 9 on page 24.
24,
23