User Manual

A white paper issued by Siemens  September 2015

2.3 Operational precautions

Figure 13: Measures to limit “stress escalation” in the event of fire

a) Design measures

Implementation of the Silent Extinguishing measures, including the use of an appropriate extin-

guishing agent, CDT systems, Silent Nozzles, a 120-second discharge time and optimal nozzle

placement.

b) Operational management system

A Data Center Integrated Management System to present and prioritize all decision-relevant data,

alarm handling and measure plans for all IT- and technical building management systems.

Normal operation

Selection and qualification of the hard disk drives used in accordance with a predefined checklist

 for example, new generations of hard disk drives/technologies will be qualified in terms of their

noise sensitivity.

Pre-alarm

Determine the reason for the pre-alarm as quickly as possible in order to lay the foundation for

subsequent decisions. If possible, prevent escalation to a fire alarm.

1st fire alarm

When the fire alarm is triggered, the event escalates massively. The fire alarm is transmitted to the

fire brigade which appears within minutes.

This is the ideal time to change over from main- to backup data center operation.