UNI EN 257 : 2010
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
MECHANICAL THERMOSTATS FOR GAS-BURNING APPLIANCES
12-07-2022
09-09-2010
Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Classification
5 Units of measurement and test conditions
6 Construction requirements
7 Performance
8 EMC/Electrical requirements
9 Marking, installation and operating instructions
Annex A (informative) - Gas connections in common use in
the various countries
Annex B (informative) - Leak-tightness test - volumetric
method
Annex C (informative) - Leak-tightness test - pressure loss
method
Annex D (normative) - Conversion of pressure loss into leakage
rate
Annex E (normative) - Electrical/electronic component fault
modes
Annex F (normative) - Additional requirements for safety
accessories and pressure accessories as defined in EU
Directive 97/23/EC
Annex G (normative) - Materials for pressurized parts
Annex H (informative) - Additional materials for pressurized
parts
Annex I (normative) - Requirements for controls used in DC
supplied gas burners and gas burning appliances
Annex ZA (informative) - Relationship between this European
Standard and the Essential Requirements of EU Directive
2009/142/EC relating to appliances burning gaseous fuels
Bibliography
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