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22 C120-H007-05EN
CHAPTER 2 Installation Sites
(6) Base floor and free-access floor cleaning
The base floor and the free-access floor require cleaning before the server system is
installed. The following cleaning procedures are recommended, including those for
cleaning the free-access floor surface periodically:
1 Remove dust on the surface of the panels.
2 Clean with a mop or cloth dipped in a solution having an anti-static agent,
then squeeze the mop tightly before proceeding with mopping.
Never use polishing powder or solid or water-soluble waxes to clean computer rooms.
They may become deposited in gaps in the floor surface or floor panels, then scattered
by underfloor ventilation, penetrating inside the computers and affecting equipment
adversely.
2.3.3 Interiors
Server rooms require more strict temperature and humidity control than common
office rooms. Essential things to consider with regard to such air conditioning include
insulation against heat, prevention from entry of outside air, and shielding from direct
sunlight. Cutting out heat from external sources would lessen the heat load of the
building on the air conditioning facilities, leading to savings on expenditures on
power required for air conditioning.
Other factors to consider with regard to computer room interiors include sounds
absorption and insulation to suppress room noise, room lighting, and maintenance
outlets.
(1) Heat insulation
The computer room should have a heat-insulating structure to cut heat penetrating
through the walls, ceiling, windows, and other locations and to facilitate air
conditioning. Heat insulation may be effected, for example, by the use of wind-free
double walls and by finishing the walls, ceiling, and the ceiling of the floor
immediately below with heat insulators of a noncombustible kind.