EN 12953-6:2011

Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 General requirements for steam boilers and hot water boilers
5 Special requirements for steam boilers
6 Special requirements for hot water boilers
7 Operational aspects including maintenance and testing
8 Alarms and monitoring from the boiler plant
Annex A (informative) - Examples of steam and hot water boiler
        systems
Annex B (normative) - Dimensioning of expansion space
Annex C (informative) - Aspects of boiler operation
Annex D (informative) - Drain and blowdown devices
Annex E (informative) - Alarms and monitoring from the boiler
        plant
Annex F (informative) - Significant technical changes between
        this European Standard and the previous edition
Annex ZA (informative) - Relationship between this European
         Standard and the Essential Requirements of EU Directive
         97/23/EC
Bibliography

This part of this European Standard specifies the minimum requirements for safety related equipment for shell boilers as defined in EN 12953-1, to ensure the boiler operates within the allowable limits (pressure, temperature, etc.) and if the limits are exceeded the energy supply shall be interrupted and locked out without manual (human) intervention at the boiler. NOTE 1The maximum time of operation without manual (human) intervention should be defined for each boiler system.NOTE 2Annex C (informative) gives recommendations of operation and testing of the boiler system with a maximum time of operation without manual (human) intervention of 72 hours.