Compaq ML350 Compaq ProLiant ML350 Generation 2 Server Setup and Installation - Page 32

Rack Environment, IMPORTANT, CAUTION

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2-4 Compaq ProLiant ML350 Generation 2 Server Setup and Installation Guide Rack Environment To allow for servicing and adequate airflow, observe the following spatial requirements when selecting a site for your rack-mounted server: I Leave a minimum clearance of 63.5 cm (25.0 inches) in front of the rack. I Leave a minimum clearance of 76.2 cm (30.0 inches) behind the rack. I Leave a minimum clearance of 121.9 cm (48.0 inches) from the back of the rack to the back of another rack or row of racks. Compaq servers draw in cool air through the front door of the rack and expel warm air through the rear door. Therefore, the front door must be adequately ventilated to allow ambient room air to enter the cabinet, and the rear door must be adequately ventilated to allow the warm air to escape from the cabinet. IMPORTANT: Do not block the ventilation openings. When there is any vertical space in the rack 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. Compaq 9000 Series racks provide proper server cooling from flow-through perforations in the front and rear doors that provide 64 percent open area for ventilation. Refer to the rack documentation provided with Compaq 7000 Series racks for guidelines on meeting airflow requirements. CAUTION: When using a Compaq 7000 Series rack, you must install the high-airflow rack door insert [Part Number 327281-B21 (42U) and Part Number 157847-B21 (22U)] to provide proper front-to-back airflow and cooling to prevent damage to the equipment.

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2-4
Compaq ProLiant ML350 Generation 2 Server Setup and Installation Guide
Rack Environment
To allow for servicing and adequate airflow, observe the following spatial
requirements when selecting a site for your rack-mounted server:
■
Leave a minimum clearance of 63.5 cm (25.0 inches) in front of the
rack.
■
Leave a minimum clearance of 76.2 cm (30.0 inches) behind the rack.
■
Leave a minimum clearance of 121.9 cm (48.0 inches) from the back of
the rack to the back of another rack or row of racks.
Compaq servers draw in cool air through the front door of the rack and expel
warm air through the rear door. Therefore, the front door must be adequately
ventilated to allow ambient room air to enter the cabinet, and the rear door
must be adequately ventilated to allow the warm air to escape from the
cabinet.
IMPORTANT:
Do not block the ventilation openings.
When there is any vertical space in the rack 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.
Compaq 9000 Series racks provide proper server cooling from flow-through
perforations in the front and rear doors that provide 64 percent open area for
ventilation. Refer to the rack documentation provided with Compaq 7000
Series racks for guidelines on meeting airflow requirements.
CAUTION:
When using a Compaq 7000 Series rack, you must install the
high-airflow rack door insert [Part Number 327281-B21 (42U) and Part Number
157847-B21 (22U)] to provide proper front-to-back airflow and cooling to
prevent damage to the equipment.