HP Integrity rx7620 Server - User Service Guide, Sixth Edition

• Use a grounded wrist strap (or other grounding method) when handling circuit boards.
• Store spare electronic modules in antistatic containers.
• Maintain recommended humidity level and airflow rates in the computer room.
Acoustics
Computer equipment and air conditioning blowers cause computer rooms to be noisy. Ambient
noise level in a computer room can be reduced as follows:
• Cover the ceiling with a commercial grade of fire-resistant, acoustic rated, fiberglass ceiling
tile.
• Cover the walls with curtains or other sound deadening material.
• Use foam rubber models as removable partitions for most effectiveness.
Facility Characteristics
This section contains information about facility characteristics that must be considered for the
installation or operation of the server. Facility characteristics are:
• Floor loading
• Windows
• Altitude effects
Floor Loading
The computer room floor must be able to support the total weight of the installed computer
system as well as the weight of the individual cabinets as they are moved into position.
Floor loading is usually not an issue in nonraised floor installations. The information presented
in this section is directed toward raised floor installations.
NOTE: Any floor system under consideration for a server installation should be verified by an
appropriate floor system consultant.
Raised Floor Loading
Raised floor loading is a function of the manufacturer’s load specification and the positioning
of the equipment relative to the raised floor grid. Though HP cannot assume responsibility for
determining the suitability of a particular raised floor system, it does provide information and
illustrations for the customer or local agencies to determine installation requirements.
The following guidelines are recommended:
• Because many raised floor systems do not have grid stringers between floor stands, the
lateral support for the floor stands depends on adjacent panels being in place. To avoid
compromising this type of floor system while gaining under floor access, remove only one
floor panel at a time.
• Larger floor grids (bigger panels) are generally rated for lighter loads.
CAUTION: Do not install any raised floor system until you have carefully examined it to verify
that it is adequate to support the appropriate installation.
Floor Loading Terms
Table C-3 defines floor loading terms.
Table C-3 Floor Loading Term Definitions
DefinitionTerm
The weight of the raised panel floor system, including the understructure. Expressed
in lb/ft2 (kg/m2).
Dead load
The load that the floor system can safely support. Expressed in lb/ft2 (kg/m2).Live load
Facility Characteristics 191