Sirius 800 Series User Manual
Ventilation
Warnings and Precautions 2.8
Iss 5 Rev 7
Page 17
© 2017 SAM
2.8 Ventilation
A fully populated Sirius 800 is ventilated by groups of fan modules mounted in the front and
rear of the router. The vents in the front, sides and rear must not be obstructed and should be
periodically cleaned and kept free from the build-up of dust. All the fan modules are monitored
for failure.
Air is pulled in through the ventilation slots in the front door and circulated through the router,
passing over the modules, and then expelled by the rear fans, air is also expelled out at points
on each side of the frame, where the crosspoint modules are situated.
The power supply shelves have their own integral cooling system.
•
Ensure the flow of air is not restricted through the vents and fan exhausts.
•
Do not obstruct the air vents situated on both sides of the frame, and allow a
minimum of 50 mm (2 inches) clearance to allow air flow. The air that is exhausted
from the sides must be able to flow past the rear of the router frame without being
obstructed. This also applies to the PSU shelves.
•
The fan assemblies should be placed back into the closed position as soon as
possible after opening, as this ensures correct ventilation of the frame. Failure to
do this will result in failure.
•
In practice the maximum time that a fan assembly can be left open will depend on a
number of factors such as; ambient temperature, frame loading, crosspoint
routings, etc. To ensure correct operation under all conditions the fan assemblies
should be left open for no more than 4 minutes at a time.
