HP Apollo 2000 System, Руководство пользователя, Страница: 11 / 203

When vertical space in the rack is not filled by a server or rack component, the gaps between the components
cause changes in airflow through the rack and across the servers. Cover all gaps with blanking panels to
maintain proper airflow.
CAUTION:
Always use blanking panels to fill empty vertical spaces in the rack. This arrangement ensures proper
airflow. Using a rack without blanking panels results in improper cooling that can lead to thermal
damage.
The 9000 and 10000 Series Racks provide proper server cooling from flow-through perforations in the front
and rear doors that provide 64 percent open area for ventilation.
CAUTION:
When using a Compaq branded 7000 series rack, install the high airflow rack door insert (PN 327281-
B21 for 42U rack, PN 157847-B21 for 22U rack) to provide proper front-to-back airflow and cooling.
CAUTION:
If a third-party rack is used, observe the following additional requirements to ensure adequate airflow
and to prevent damage to the equipment:
• Front and rear doors—If the 42U rack includes closing front and rear doors, you must allow 5,350 sq
cm (830 sq in) of holes evenly distributed from top to bottom to permit adequate airflow (equivalent to
the required 64 percent open area for ventilation).
• Side—The clearance between the installed rack component and the side panels of the rack must be
a minimum of 7 cm (2.75 in).
Temperature requirements
To ensure continued safe and reliable equipment operation, install or position the rack in a well-ventilated,
climate-controlled environment.
The operating temperature inside the rack is always higher than the room temperature and is dependent on
the configuration of equipment in the rack. Check the TMRA for each piece of equipment before installation.
CAUTION:
To reduce the risk of damage to the equipment when installing third-party options:
• Do not permit optional equipment to impede airflow around the chassis or to increase the internal
rack temperature beyond the maximum allowable limits.
• Do not exceed the manufacturer’s TMRA.
Grounding requirements
• The building installation must provide a means of connection to protective earth.
• The equipment must be connected to that means of connection.
• A service person must check whether the socket-outlet from which the equipment is to be powered
provides a connection to the building protective earth. If the outlet does not provide a connection, the
service person must arrange for the installation of a protective earthing conductor from the separate
protective earthing terminal to the protective earth wire in the building.
Temperature requirements 11