Xtralis Identity Program

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The essentials in just 15 slides
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• EN 54-20 is a Product Standard

• It is a foundation for reliable aspirating
  systems

Product Standard
3

• EN 54-20 is a Product Standard

• It is a foundation for reliable aspirating
  systems
• Sets minimum performancerequirements for
  approval

Product Approval
Product Standard
4

• EN 54-20 is a Product Standard

• It is a foundation for reliable aspirating
  systems
• Sets minimum performance requirements for
  approval
• Codes of Practice provide rulesand advice on
  best application and installation practise

C.O.P.
Product Approval
Product Standard
5

• EN 54-20 is a Product Standard

• It is a foundation for reliable aspirating
  systems
• Sets minimum performancerequirements for
  approval
• Codes of Practice provide rulesand advice on
  best application and installation practise
• To achieve the goal of reliable smoke detection

GOAL ! Reliable Smoke detection
C.O.P.
Product Approval
Product Standard
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• Tests for

• Reproducibility
• Repeatability
• Robustness
• Performance
• Smoke detection (obviously!)
• and also
• flow detection and
• detection time

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• Defines THREE Sensitivity classes

• Class A High sensitivity
• Class B Enhanced Sensitivity
• Class C normal sensitivity

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• New sensitivity classes will help

• First time high sensitivity has been clearly
  defined
• Normal sensitivity is equivalent to point
  detection
• Uses same test fires (from EN54-7)
• Enhanced sensitivity is several times more
  sensitive than normal sensitivity
• High sensitivity is many times more sensitive
  than normal sensitivity
• Based on TF2 end-of-test criteria

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• But how can it help

• Use Class C detectors in place of point detectors
  with total confidence
• When access is limited
• In Challenging environments
• Where concealed detection is needed
• Use Class A or B detectors where
• Earlier warning is needed
• Smoke is difficult to detect
• Early evacuation is needed
• Automatic Suppression is to be avoided

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• Exploit Early Warning

• USE MULTIPLE THRESHOLDS
• EN54-20 formally approves the Fire relay
• However it is very logical to specify an ASD
  system with Class C Fire sensitivity but which
  also requires Class B and/or Class A early
  warning to provide

An appropriate early response before evacuation
or suppression is needed!
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• But beware!

• EN54-20 has a minor flaw and fails to define how
  a detectors capability should be communicated.
• For example, a detector with 30 Class A holes
  (each capable of detecting all the class A test
  fires in time) is not clearly distinguishable
  from a less capable detector with only 3 Class A
  holes.
• So always check HOW MANY HOLES

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• For more information

• Visit www.en54-20.org
• Where
• a copy of this presentation is available
• further application guidance will be developed
  including
• Examples of how to specify ASD using EN54-20
  classes
• Updates on how installation codes (such as the
  FIA Code of Practice for ASD systems) are
  adopting EN54-20.
• Advice on what Class to use in which
  applications.
• Recommendations on how express the performance
  requirements of early warning detection systems.
• Case studies of installations using EN54-20
  approved detectors