Bull NovaScale 3005 Series Specifications download pdf (Page 35)

3-1

Air Conditioning

Chapter 3. Air-Conditioning

This chapter explains air-conditioning requirements for the servers.

It includes the following topics:

• Air-Conditioning System Features and Functions, on page 3-1

• Air-Conditioning System Specifications, on page 3-2

• Checks and Alarms, see page 3-5

CAUTION:

An air-conditioning system, compliant with the requirements of NF X44-101,

Class 4 000 000, dated June 1981 and with ISO 7730, is mandatory for the Bull NovaScale

Server.

Air-Conditioning System Features and Functions

Features

The Customer's air-conditioning specialist must select a fully automatic air-conditioning system

specially designed for the Data Processing Center. Radiators, fitted with thermostatic valves,

are acceptable in certain ancillary premises only.

The air-conditioning system must comprise at least two redundant assemblies, each providing

at least 66% of the total cooling power, to ensure continuity of operation.

Note:

The air-conditioning system will dry conditioned air. It is therefore mandatory for the

air-conditioning system to include a steam generation humidifier.

Functions

Temperature Control

Changes in temperature, in particular sudden changes in temperature, accelerate the ageing

of components. It is therefore important for ambient temperature to be stable and to be

maintained within the limits required for the system.

Hygrometry Control

A low level of hygrometry induces static electricity and a high level of hygrometry induces

corrosion and mildew. It is therefore important to comply with hygrometry specifications.

Heat Dissipation

When assessing heat dissipation / balance (in kW), the Customer's air-conditioning

specialist must take the following elements into account:

• servers and extensions,

• sunlight,

• radiation from outside walls,

• transmission of heat through walls separating the Computer Room from adjacent rooms,

• lighting,

• personnel,

• air renewal.

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Bull NovaScale 3005 Series Specifications Page 35