CHAPTER 1 Installation Data

1.6 Installation Environment

1.6Installation Environment

This section describes the installation environment of the base cabinet and PCI_Box.

1.6.1 Dust

Suspended Particles

Suspended particles in a computer room should not exceed 0.15mg/m3. A computer is designed in such a way that it withstands the suspended particles. This value is permissible in an ordinary office. However, this value can be maintained in the ordinary computer room if there is less outdoor air infiltration having suspended particles like dust and if there is no smoke of cigarettes.

Dust Removal

The suspended particles like dust are collected in the filter of an air conditioner. The dust should be removed from the computer room by cleaning floor surfaces and underfloor periodically. Cleaning is necessary in the following cases.

When the computer room is ready, and before bringing in the computers

At the time of repairing the computer room

At the time of shifting the computers and re-arranging the devices

1.6.2Corrosive Gas

Corrosive gas and salty wind cause corrosion, malfunctioning, and damage of the device, and reduce life of the device remarkably.

Corrosive gas should be removed by providing suitable air cleaning equipment. In addition, positive clear air pressure in the room prevents an entering of the corrosive gas from the outside. The chemical factory area, thermal water/ volcanic zone etc. are considered as a source of corrosive gas.

TABLE 1.6 Permissible Level of Corrosive Gas

Name of gas

Permissible level

Hydrogen sulfide (H2S)

7.1ppb or less

Sulfur dioxide (Sulfur oxide)(SO2)

37ppb or less

Hydrogen chloride (HCL)

6.6ppb or less

Chlorine (CI2)

3.4ppb or less

Hydrogen fluoride (HF)

3.6ppb or less

Nitrogen dioxide (Nitrogen oxides)(NO2)

52ppb or less

Ammonia(NH3)

420ppb or less

Ozone(O3)

5ppb or less

Fluid vapor

0.2mg/m3 or less

1.6.3 Sea Water (Salt Damage)

A large number of sea-salt particles are suspended in air by the salty wind near the sea-coast. If the sea-salt particles remain in the computer, moisture and chemically condensed substances cause insulation failure, and corrosion degradation of the components. Therefore, the computer should be installed at a place which is far from the sea-coast.

Installation standards to prevent damage due to sea salt particles are shown below.

Standards: The computer should be installed at a place which is at least 0.5km away from the sea-coast (Excluding the case having air-conditioner which prevents an entering of air from outside)

1.7Safety Measures

For details on safety measures, see “Chapter 8 Safety Measures” of “SPARC M10 System/ SPARC Enterprise/PRIMEQUEST Common Installation Planning Manual” (C120-H007EN).

 

 

 

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C122-H007-01EN