Fujitsu C122-E119EN User Manual

This section describes matters regarding the installation environment of equipment.
 

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-

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Ensure that airborne dust does not exceed 0.15 mg/m

3

 in computer rooms. Most computers are designed to withstand

this level of airborne dust. This is the same as the permissible level for airborne dust in a general office and should

be easily attainable in a computer room where there is little inflow of outside air containing airborne dust and

cigarette smoke.
 

Airborne dust is collected by air filters in the air conditioner. The computer room must be periodically cleaned to

remove dust on and under the floor. Cleaning is required in the following situations:

- When the construction of the computer room has just been completed, and it is ready to house equipment.

- When the computer room has been repaired.

- When equipment already in position in the computer room has been relocated.

 

Corrosive gases must be removed and kept out by using appropriate air cleaning facilities. Maintaining positive

pressure in the computer room with filtered air will serve as a safeguard against the entry of corrosive gases from

 lists the tolerable limits for different kinds of

corrosive gases.
 

TABLE 1.5 Tolerable limits for corrosive gases

Gas name

Tolerable limit

Hydrogen sulfide (H

2

S)

7.1 ppb and under

Sulfur dioxide (sulfur oxide) (SO

2

)

37 ppb and under

Hydrogen chloride (HCI)

6.6 ppb and under

Chlorine (CI

2

)

3.4 ppb and under

Hydrogen fluoride (HF)

3.6 ppb and under

Nitrogen dioxide (nitrogen oxide) (NO

2

)

52 ppb and under

Ammonia (NH

3

)

420 ppb and under

Ozone (O

3

)

5 ppb and under

Oil vapor

0.2 mg/m

3

 and under

 

PRIMEQUEST 1000 Series Hardware Installation Manual
CHAPTER 1 Installation Information

16

C122-H004-07EN