Table 2-1 Environmental Requirements; Table 2-2 Sun Fire 15K/12K Systems Cabinet Power And Cooling Requirements - Sun Microsystems Fire 15K Site Planning Manual

power consumption in power (watts) and the total system air conditioning required
in British thermal units (BTUs/hrs). The amount of air conditioning required
depends upon your configuration.
Sun Fire 15K/12K Systems Cabinet Power and Cooling Requirements
TABLE 2-2
Sun Fire
System Quantity of System Slots Occupied
12K Up to 9
15K Up to 18
The dynamics of the Sun Fire 15K/12K systems power dissipation depends on the
application and configuration. This manual accounts for these dynamics and is
based on a rigorous code condition set that has been verified in a lab environment.
During these tests, all measurements were taken with the latest-technology, high-
speed current probe connected to the 48-volt side. The numbers were then changed
to account for efficiency loss and power factor correction.
Once the system configuration (based on the number of system boards and I/O
configuration) is determined, the environmental cooling requirements must be
calculated. It is important that the site is able to accommodate the appropriate
environmental requirements. The numbers in this manual account for these
requirements.
To facilitate future upgrades, always provide environmental cooling, not merely
limited to the purchased configuration of system and I/O boards, but for the
anticipated growth, or maximum power dissipation and cooling needs.
For example, although all cabinets are normally configured with a full-capacity
power system, the actual system power dissipation might be much less than the
maximum available, and will vary depending upon the number and type of
configured components. Therefore, in the design phase of facility development,
provide enough power and cooling capacity for the maximum configuration
anticipated. When upgrading, system power dissipation will increase, which might
require new site planning for power and cooling.
Power
(watts)
12,965
23,927
Chapter 2 Environmental Requirements
Air Conditioning
(Btu/Hr)
44,081
81,352
2-3