Fujitsu C120-H007-06EN User Manual

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C120-H007-05EN

CHAPTER 4 Air Conditioning

 

 

The air conditioning system must have the capacity to be able to process the amount 
of heat dissipated from the computer equipment to cool the computer room. A 

server 

system

 generates heat from the Power Supply Unit, semiconductor devices, etc. The 

rated or listed capacity of the air conditioning facilities may have been measured for a 
general office for human beings as specified by the relevant industrial standards or the 
like and may not be readily applicable to a 

server 

room environment. Consultation or 

design by a professional engineer is required for determining the capacity of an air 
conditioner to be used in a computer room.

 

The air conditioning facilities for a computer room must be kept operable at all times. 
A large number of relatively low-capacity units are recommended. Maintain the room 
air at a somewhat lower temperature, so that even if one unit fails, there would still be 
time to take corrective action before a critical temperature is reached. The installation 
of spare units to back up the primary units is also recommended.

 

Air conditioner installations for computer rooms can be grouped into four broad styles 
as listed below. Choose from them to suit the user's architectural requirements, the 
size of the system installation, layout constraints, etc.

 

z Direct blowing

 

z Duct blowing

 

z Underfloor ventilation

 

z Combined use of direct or duct blowing and underfloor ventilation

 

These methods are detailed as below: