Cisco XR 12406 Installation Manual page 76

Installation Site Requirements
Ventilation
Note
Cisco XR 12406 Router Installation Guide
2-12
The blower module is mounted at the rear of the chassis; air flow to the air filters
and blower module should not be blocked.
Warm air is exhausted from the rear of the chassis. Maintain 6 inches (15.24 cm)
of clearance at both the inlet and exhaust openings on the chassis to allow
sufficient air flow.
When placing multiple a Cisco XR 12406 Router in the same rack, ensure that
•
there is sufficient ventilation to accommodate the routers.
Equipment located near the bottom of the rack can generate excessive heat
•
that is drawn upward and into the intake ports of equipment above, possibly
leading to overheating.
• The heated exhaust air from other equipment can enter the inlet air vents and
cause overheating inside the router.
A ventilation system that is too powerful in an enclosed rack can also prevent
•
cooling by creating negative air pressure around the chassis and redirecting
the air away from the air intake vent. If necessary, operate the router with the
rack door open or in an open rack.
The correct use of baffles inside an enclosed rack can assist in cooling the
•
router.
Chapter 2 Preparing for Installation
OL-13831-01