IBM 7012 397, Site And Hardware Planning Information

Page: 177 / 415

Cooling Requirements
The
Eserver
pSeries 670 requires air for cooling. As shown in
″
Proposed Floor Layout for Multiple
Systems
″
on page 156, rows of
Eserver
pSeries 670 systems must face front-to-front. The use of a
raised floor is recommended to provide air through perforated floor panels placed in rows between the
fronts of systems (the cold aisles shown in the figure on page 156).
Note: Do not place perforated tiles in the hot aisles. Heated exhaust air must exit the computer room
through the ceiling air-return system.
The following table provides system cooling requirements based on system configuration. The letter
designations in the table correspond to the letter designations in the graph shown in “Cooling
Requirements Graph” on page 160.
Number of I/O Drawers
(7040-61D) 1.1 GHz 4-way Module
(Cooling Chart Reference) 1.1 GHz 8-way Modules (Cooling Chart Reference)
8-way 16-way
1 A A A
2 A A B
3 N/A N/A C
Number of I/O Drawers
(7040-61D) 1.5 GHz 4-way Module
(Cooling Chart Reference) 1.5 GHz 8-way Modules (Cooling Chart Reference)
8-way 16-way
1 A A B
2 A B B
3 N/A N/A C
Chapter 2. Physical Characteristics of Systems
159