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EVS-EN 257:2022

Mechanical thermostats for gas-burning appliances

General information
Withdrawn from 29.12.2023
Base Documents
EN 257:2022
Directives or regulations
2016/426/EU Gas appliances (GAR)

Although the standard’s status is withdrawn, it still has the presumption of conformity in the meaning of regulation 2016/426/EU and conformance with the regulation ’s requirements can be guaranteed by using the withdrawn version of the standard. The presumption of conformity is valid until a corresponding amendment is published in the Official Journal of the European Union.
 
To view the latest lists of harmonised standards published in the Official Journal of the European Union, visit: 
http://ec.europa.eu/growth/single-market/european-standards/harmonised-standards/

Standard history

Status
Date
Type
Name
29.12.2023
Main + amendment
01.11.2022
Main
04.10.2010
Main
EVS-EN 257:2010
EN 13611:2019, Clause 1 applies with the following modification and addition:
Modification:
The 1st paragraph of EN 13611:2019, Clause 1 is replaced by:
This document specifies the safety, design, construction, and performance requirements and testing for mechanical thermostats intended for use with gas appliances and similar use, hereafter referred to as “thermostats”.
This document is applicable to thermostats with declared maximum inlet pressures up to and including 50 kPa and of nominal connection sizes up to and including DN 50 for use with one or more fuel gases.
Addition:
This document is applicable to thermostats controlling the gas flow directly or indirectly through an integral gas valve. This document applies to thermostats used with gas appliances which are not installed in the open air.
Thermostats dealt with in this document are intended for control functions.
This document is not applicable to:
a)  controls which use auxiliary energy (e.g. electrical energy supplied externally);
b)  an assessment of the control regarding Performance Level (PL) and Safety Integrity Level (SIL).
The 4th paragraph of EN 13611:2019, Clause 1 is removed.
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