38 C120-H007-05EN
CHAPTER 4 Air Conditioning
Sometimes the underfloor-ventilation air conditioner does not perform heating and
humidifying but only cools the room air to the target temperature. In this situation,
regulation of the temperature and humidity of the air in the room and under the floor
can be accomplished by heating and humidifying the room air and the outside air after
it has been dehumidified by overcooling by the underfloor air conditioner.
Figure 4.4 shows a schematic view of a combined system.
Figure 4.4 Schematic view of a combined system
4.3 Air Conditioning Conditions
This section describes air conditioning conditions.

4.3.1 Permissible temperature and humidity ranges for server

systems

Each component of a server system has its own permissible temperature and humidity
ranges, within which its operability is guaranteed. The prescribed temperature and
humidity are those at the air vents of the component. For the permissible temperature
and humidity ranges, see the Installation Planning Manual for each device.