Datasheet

Cooling Subsystem Intel® Server System SR1550AL
Revision – 1.3
Intel order number D31982-006
20
3. Cooling Subsystem
Several components and configuration requirements make up the cooling sub-system. These
include the system fan module, the power supply fans, power supply air duct, CPU air duct, and
drive bay population. All are necessary to provide and regulate the air flow and air pressure
needed to maintain the system’s thermals when operating at or below maximum specified
thermal limits. See Table 60. System Environmental Limits.
The system has a non-redundant system cooling configuration consisting of five 40x40x56mm
dual rotor system fans to provide sufficient airflow to maintain internal system thermal
requirements when the external ambient temperature remains within specified limits. Should a
single fan failure occur, the system should be shut down and the failed fan replaced as soon as
possible.
In addition to the system fans, each power supply module installed provides an additional 56mm
dual rotor fan which pulls air from inside the chassis and blows it out the back.
The system utilizes an integrated platform control mechanism to manage a variable fan speed
control engine to provide adequate cooling for the system. (See Chapter 4 – Platform Control
for more information.) In the event of a fan failure, the BMC will boost the remaining fans as a
means to compensate for the lost air flow. If the cooling is not sufficient under a failed fan
condition the system will eventually shutdown as a means to protect itself from thermal damage.
3.1 Fan Module
The system fan module houses five 40x40x56mm dual rotor system fans. The module has been
designed for ease of use and has support for several management features that can be utilized
by the baseboard management system. The system fan module and individual fans do not
require tools for installation or removal.
Figure 16. Fan Module