Nortel Passport 15000 Preparation Manual page 57

Figure 4
Airflow directions of upper and lower cooling units in an NTRU04
Air filter cover
Air flow out
of the lower (rear)
cooling unit
Air filter cover
Passport 15000, 20000 Site Requirements and Preparation Guide
Chapter 2 Planning considerations 57
Air flow out of the
shelf assembly
under the BIP
Air flow into the
upper (front)
cooling unit
Air flow into the
frame to the
shelf assembly
PPT 2820 041 AA
5.2S2