Chapter 1 - Installing the Chassis and Hardware
1 - 4
MPA Installation Guide
Document No. CO 402227
1.8 Dual Cooling Units (Fan Trays)
The 2
nd
generation chassis supports two redundant swappable Cooling Units, each equipped
with 4 push-pull fans per CU with each fan rated at 20 CFM, for more than 100 CFM of total
airflow though the chassis for better thermal profile.
Warning
! Never turn the chassis Power on without both fan trays fully inserted.
1.9 Air Filter Swap
The MPA chassis provides a front replaceable air filter, next to the right fan tray, to reduce the level
of dust intake.
The air filter element can be pulled out and cleaned or replaced.
The air filter meets the NEBS requirements of the Telcordia Technologies Generic
Requirements GR-78-CORE specification, R8-4 minimum dust arrestance of 80%.
Figure 1-6: Cooling Units (Fan Trays)
Figure 1-7: Air Filter
