Emerson Network Power
Wireline Products
631-205-105
Version 01, January 2009
Page 18 of 21
Proprietary Information
Outside Plant Equipment
8. HEAT EXCHANGER
8.0.1 The MESA
®
SOLE cabinet includes a door mounted heat exchanger, which is
capable of removing 650 Watts of heat at 65
o
.
8.1 Heat Exchanger Fans
8.1.1 The heat exchanger is a dual air chamber, vertical air flow device that keeps the
temperature within the equipment manufacturer’s recommendations. The
exterior cooling air is never mixed with the air in the electronics chamber.
8.1.2 The heat exchanger is equipped with an internal and external fan that can run
independently of each other. If one fan fails, the other will keep operating.
The external fan draws exterior air through the bottom of the cabinet and
exhausts it out into the air chamber in the cabinet top.
The internal fan draws interior air in from the top of the electronics chamber and
exhausts it out the bottom of the chamber.
8.2 Heat Exchanger Control
8.2.1 The MESA
®
SOLE heat exchanger system is managed by an Environmental
Control Card (ECC).
Fig. 14 : Door Mounted Heat Exchanger