oSIST prEN 1854:2020

SLOVENSKI STANDARD
oSIST prEN 1854:2020
01-oktober-2020

Varnostne in nadzorne naprave za gorilnike in aparate na plin in/ali tekoča goriva -

Safety and control devices for burners and appliances burning gaseous and/or liquid

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee

If this draft becomes a European Standard, CEN members are bound to comply with the CEN/CENELEC Internal Regulations

which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.

This draft European Standard was established by CEN in three official versions (English, French, German). A version in any other

language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,

Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,

Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and

Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without

© 2020 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 1854:2020 E

European foreword ....................................................................................................................................................... 3

1 Scope .................................................................................................................................................................... 4

2 Normative references .................................................................................................................................... 4

3 Terms and definitions ................................................................................................................................... 5

4 Classification .................................................................................................................................................. 11

5 Test conditions and uncertainty of measurements ......................................................................... 11

6 Design and construction ............................................................................................................................ 11

7 Performance .................................................................................................................................................. 18

8 Electrical requirements ............................................................................................................................. 29

9 Electromagnetic compatibility (EMC) ................................................................................................... 30

10 Marking, instructions ................................................................................................................................. 32

Annex A (informative) Abbreviations and Symbols ....................................................................................... 34

Annex B (informative) Leak-tightness test for gas controls – volumetric method .............................. 35

Annex C (informative) Leak-tightness test for gas controls – pressure loss method ......................... 36

Annex D (normative) Calculation of pressure loss into leakage rate ....................................................... 37

Annex E (normative) Electrical/electronic component fault modes ........................................................ 38

accessories as defined in EU Directive 2014/68/EU ....................................................................... 39

Annex G (normative) Materials for pressurized parts................................................................................... 40

Annex H (normative) Additional materials for pressurized parts ............................................................ 41

Annex I (normative) Requirements for controls used in DC supplied gas burners and

appliances burning gaseous or liquid fuels ........................................................................................ 42

Annex J (normative) Method for determination of a Safety integrity level (SIL) ................................. 43

Annex K (normative) Method for the determination of a Performance Level (PL) ............................ 44

Annex L (informative) Relationship between Safety Integrity Level (SIL) and performance

Level (PL) ........................................................................................................................................................ 45

Annex M (normative) Reset functions ................................................................................................................. 46

Annex N (informative) Guidance document on Environmental Aspects ................................................. 47

Annex O (normative) Seals of elastomer, cork and synthetic fibre mixtures ....................................... 48

Annex AA (informative) Declaration for EPSDs................................................................................................ 49

Annex ZA (informative) Relationship between this European Standard and the essential

requirements of EU Directive 2009/142/EC aimed to be covered ............................................ 50

Annex ZB (informative) Relationship between this European Standard and the essential

requirements of regulation (EU) 2016/426 aimed to be covered ............................................. 51

Bibliography ................................................................................................................................................................. 54

This document (prEN 1854:2020) has been prepared by Technical Committee CEN/TC 58 “Safety and

control devices for burners and appliances burning gaseous or liquid fuels”, the secretariat of which is

This document has been prepared under a mandate given to CEN by the European Commission and the

European Free Trade Association and supports essential requirements of EU Directive(s).

For relationship with EU Directive(s), see informative Annex ZB, which are an integral part of this

This document refers to clauses of EN 13611:2019 or adapts it by stating “with the following

modification”, “with the following addition”, “is replaced by the following” or “is not applicable” in the

corresponding clause. This document adds clauses or subclauses to the structure of EN 13611:2019

which are particular to this document. It should be noted that these clauses and subclauses are not

It should be noted that the following significant technical changes compared to the previous edition

a) the scope introduces a new declaration concerning the maximum inlet pressure covered by the

b) incorporation of the requirements and tests for electronic pressure sensing devices (EPSDs);

This document specifies the safety, design, construction, and performance requirements and testing of

pressure sensing devices for burners and appliances burning one or more gaseous fuels.

It applies to pressure sensing devices for the measurement of pressures of gases according to EN 437 or

It applies to all types of pressure sensing devices, including electronic, differential and inferential types.

It also specifies requirements for pressure sensing devices which are intended to be applied to steam

boilers and as such need to meet increased reliability requirements. These devices are classified as PSD-

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements of this document. For dated references, only the edition cited applies. For

undated references, the latest edition of the referenced document (including any amendments) applies.

EN 13611:2019, Safety and control devices for burners and appliances burning gaseous and/or liquid

EN 60529:1991+A1:2000+A2:2013+AC:2016, Degrees of protection provided by enclosures (IP Code)(IEC

EN 60730-2-6:2016, Automatic electrical controls - Part 2-6: Particular requirements for automatic

EN 61058-1:2018, Switches for appliances — Part 1: General requirements (IEC 61058-1:2016)

EN 175301-803:2006, Detail Specification: Rectangular connectors - Flat contacts, 0,8 mm thickness,

EN ISO 75:2013, (all parts), Plastics — Determination of temperature of deflection under load

IEC 60730-1:2011, Automatic electrical controls for household and similar use — Part 1: General

For the purposes of this document, the terms and definitions given in EN 13611:2019 and the following

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

declared range of adjustment of the PSD between the highest and lowest set points

part of the EPSD, which transforms the signal to be sensed (e.g. pressure) to another physical value (e.g.

transforms the signal from the sensing element into the output signal of the EPSD

NOTE The signal conditioner may consist of functional electronics as well as electronics which cause the

time counted from start of the step change input signal (e.g. pressure) until the output signal (e.g.

maximum difference between the current output signal and its steady-state value as stated in the

time counted from start of the step change input signal until the output signal remains within the

biggest deviation between the output signal and its steady-state value after step change of the inlet

pressure that is withstood without degraded characteristic after returning below the maximum inlet

difference between the declared or indicated set point and the pressure measured before the endurance

difference between the switching pressures, or in case of EPSD the positive or negative shift of the

greatest differences between the upscale and downscale output readings or upper and lower switching

NOTE Clarification of the hysteresis in reference to other definitions of PSDs is given in Figure 6, 7 and 8.

positive or negative rotation of the sensor characteristic with the point of rotation as the intersection of

worst case deviation of straightness of the actual transfer function from the ideal straight line

positive or negative deviation of the intersection of the sensor characteristic and the y-axis

state of the PSD with all output terminals deenergized or providing a signal (status) which ensures a

— EPSD, being an electronic pressure sensing device, including devices with variable output.

The minimum inlet pressure, the maximum inlet pressure and the withstand pressure shall be declared

in the instructions. If no withstand pressure is declared, the withstand pressure is equal to the

maximum inlet pressure. At the withstand pressure, devices shall comply with the requirements of this

For PSDs and/or EPSDs designed for combustible gas and combustion products EN 13611:2019, 6.2.3.1

The requirements of this clause are not applicable for PSDs and/or EPSDs with a maximum inlet

pressure up to and including 60 kPa (600 mbar), which fulfil the requirements of 6.3.2.1.

Orifices of all compartments used for pressure transmission shall have a minimum internal diameter of

0,7 mm, except in cases where a smaller orifice is protected against fouling and clogging by suitable

If a manual reset function is provided the reset action shall be independent of manipulation or position

In the instructions shall be declared the nature of the sensed medium for which the device is designed.

a) switching parts shall have the characteristics of a snap-acting contact as described in

c) pressure-stressed measurement parts shall be manufactured from materials resistant to corrosion

e) the requirements of EN 60529:1991+A1:2000+A2:2013+AC:2016, IP44 shall be met as a minimum.

Parts of the housing which directly or indirectly separate a gas-carrying compartment from atmosphere

a) metallic materials that have a melting point (solidus temperature) of at least 427 °C, or

c) non-metallic materials for PSDs and/or EPSDs with a withstand pressure up to and including

1) these gas carrying compartments are protected from the gas supply by a metallically housed

2) a leakage rate of 70 dm /h of air is not exceeded after the test described in 6.3.2.2 b).

For housings according to a), the external leakage after removal or fracture of non-metallic parts other

than O-rings, gaskets and sealing parts of diaphragms, shall not exceed 30 dm /h of air escaping at the

NOTE When inside the housing a diaphragm separates the gas-carrying compartment from atmosphere than

a) Remove all non-metallic parts of the housing which separate a gas-carrying compartment from

atmosphere, excluding O-rings, gaskets and sealing part of diaphragms. Any breather holes shall be

blocked. Pressurize the inlet and outlet(s) of the control to the withstand pressure and measure the

b) For PSDs and/or EPSDs with a withstand pressure up to and including 60 kPa (600 mbar) the

— store one PSD and/or EPSD for 1 h ± 5 min at 135 °C ± 2 °C ambient temperature;

— keep the PSD and/or EPSD at this temperature and apply a pressure of three times the

— pressurize the pressure ports of the PSD and/or EPSD to the withstand pressure or 1,5 times

NOTE For the purpose of this test, the parts which provides the metallically housed metallic flow restrictor

Where plastics materials are used, they shall have a declared heat deflection temperature (°C) of not

less than 1,2 times the maximum declared ambient temperature when measured in accordance with

EN ISO 75:2013 (all parts) (Method A, 1,8 MPa load) and by reference to the plastics’ data sheet.

For PSDs and/or EPSDs only suitable for air and combustion products, connections shall be as declared

in the instructions, however threads, flanges or compression fittings (if used) shall be in accordance

with EN 13611:2019, 7.4.1 and 7.4.2. Push-fit connections shall not be used for PSDs and/or EPSDs for

A method for the assessment of EPSDs is defined in 6.6. In the instructions shall be declared the class of

For EPSD technologies not specified in this standard, a safety analysis shall be performed to describe

the specific failure modes, requirements and tests for the type of technology in addition to the relevant

requirements in this standard. This safety analysis can result in additional constructional requirements

and/or additional failure modes to be included into the fault assessment. Together with the relevant

requirements of this standard, this is a set of conditions under which the new technology can be used in

NOTE In general the basic risk of fire and/or explosion as a result of uncontrolled gas or air pressures and

EN 13611:2019, 6.5.3.4 is only applicable for PSDs and/or EPSDs designed for combustible gas.

Whenever the terms lock-out or safety shutdown are used within EN 13611:2019, 6.6.3 and 6.6.4, they

For the purpose of the fault assessment the effect of internal failures in accordance with Annex AA shall

Shall be according to EN 13611:2019, 6.6.3.2 with the following modification and addition:

The fault reaction time shall be declared in the instructions with a limit of 24 h.

The instructions shall provide the output signal(s) representing the safe state(s). As the requirements of