Sun Microsystems Fire V490 Setup And Rackmounting Manual page 63

4-Post Rack Requirements (Continued)
TABLE A-1
Cabinet Feature
Airflow
Vertical mounting rails
Requirement
The system operating airflow is 200 cfm, regardless
of ambient air and altitude. This airflow is
designed to provide appropriate cooling up to 95
o
(35 C) and 10,000 feet (3.0480 meters).
For proper ventilation of the server, the front and back
doors must comply with the following minimum open area
requirements.
• 60 percent of the area of the front door that is directly in
front of the server must be open.
• 63 percent of the area of the back door that is directly
behind the server must be open.
• Maintain a minimum of 1.5-inch (3.8-cm) clearance
between the system and any front or back doors.
If the doors of the cabinet do not meet the open area
requirements, remove the door or doors that do not comply.
For more information about cooling and airflow, see the Site
Planning Guide for Entry-Level Servers Version 1.5.
The cabinet must have two pairs of vertical mounting rails
(one pair in front, one pair in back) that conform to the EIA
(RETMA) standard for mounting hole spacing.
Left-side-to-right-side rail spacing (mounting hole center
to mounting hole center) for front and back rails must be
18.3 inches (46.5 cm).
Front-to-back rail spacing must be at least 23 inches
(58.42 cm) and not more than 34.5 inches (87.63 cm)
from the outside face of the front rail to the outside face
of the back rail.
Front and back vertical rail mounting faces must be parallel
with each other and with the front plane of the rack.
Appendix A
o
F
4-Post Cabinet Requirements 53