Figure 4.6 Psychrometric Chart Applicable To Lowering The Underfloor Temperature; Table 4.3 Temperature And Humidity Recommendations (Lowering The Underfloor Temperature) - Fujitsu M10 Series Installation Planning Manual

CHAPTER 4 Air Conditioning
(2) Lowering the underfloor temperature
In unattended areas where paper is not used and where only those devices that have
broad permissible underfloor and room temperature and humidity ranges are installed,
the underfloor temperature may be lowered. As an example, in an unattended room
associated with a large system installation involving multiple computer rooms, hold
the underfloor relative humidity to 70% or below to keep the room humidity at a
lower level.
Table 4.3
apply to lowering the underfloor temperature.
Table 4.3 Temperature and humidity recommendations (lowering the underfloor
temperature)
Near the underfloor air outlet
Air
conditioning Temperature
C
setup
171 C 632 F 655%
Underfloor
ventilation
161 C 612 F 655%
171 C 632 F 655%
Combined use
of direct
161 C 612 F 655%
blowing or duct
blowing and
underfloor
ventilation
Figure 4.6

Figure 4.6 Psychrometric chart applicable to lowering the underfloor temperature

42
summarizes the practical temperature and humidity recommendations that
Humidity
F
%
is an air-line diagram applicable to lowering the underfloor temperature.
Detection and regulation point
Temperature
C F
Targeted Targeted About 42%
at 24 C
at 75F at 24C (75F)
Targeted Targeted About 40%
at 24 C
at 75F at 24C (75F)
242 C 754F 425%
242 C 754F 405%
Humidity Remarks

The
temperature
and humidity
depend on
the thermal
load.

C120-H007-08EN