SIST EN 1854:2023

SLOVENSKI STANDARD
01-marec-2023
Nadomešča:
SIST EN 1854:2010
Varnostne in nadzorne naprave za gorilnike in aparate na plin in/ali tekoča goriva -
Tlačna zaznavala za plinske gorilnike in plinske aparate
Safety and control devices for burners and appliances burning gaseous and/or liquid
fuels — Pressure sensing devices for gas burners and gas burning appliances
Sicherheits - und Regeleinrichtungen für Brenner und Brennstoffgeräte für gasförmige
und/oder flüssige Brennstoffe - Druckwächter für Gasbrenner und Gasgeräte
Equipements auxiliaires pour brûleurs et appareils utilisant des combustibles gazeux ou
liquides - Dispositifs de surveillance de pression pour brûleurs à gaz et appareils à gaz
Ta slovenski standard je istoveten z: EN 1854:2022
ICS:
23.060.40 Tlačni regulatorji Pressure regulators
27.060.20 Plinski gorilniki Gas fuel burners
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 1854
EUROPEAN STANDARD
NORME EUROPÉENNE
December 2022
EUROPÄISCHE NORM
ICS 23.060.40 Supersedes EN 1854:2010
English Version
Safety and control devices for burners and appliances
burning gaseous and/or liquid fuels - Pressure sensing
devices for gas burners and gas burning appliances
Equipements auxiliaires pour brûleurs et appareils Sicherheits- und Regeleinrichtungen für Brenner und
utilisant des combustibles gazeux ou liquides - Brennstoffgeräte für gasförmige und/oder flüssige
Dispositifs de surveillance de pression pour brûleurs à Brennstoffe - Druckwächter für Gasbrenner und
gaz et appareils à gaz Gasgeräte
This European Standard was approved by CEN on 26 September 2022.

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. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists 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 Management
Centre has the same status as the official versions.

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, Türkiye and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2022 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 1854:2022 E
worldwide for CEN national Members.

Contents Page
European foreword . 4
Introduction . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 7
4 Classification . 13
4.1 Classes of control . 13
4.2 Groups of control . 13
4.3 Classes of control functions . 14
4.4 Types of DC supplied controls . 14
5 Test conditions and uncertainty of measurements . 14
6 Design and construction . 14
6.1 General . 14
6.2 Mechanical parts of the control . 14
6.3 Materials . 16
6.4 Gas connections . 17
6.5 Electrical parts of the control . 18
6.6 Protection against internal faults for the purpose of functional safety . 19
7 Performance . 20
7.1 General . 20
7.2 Leak-tightness . 21
7.3 Torsion and bending . 22
7.4 Rated flow rate . 23
7.5 Durability . 23
7.6 Performance tests for electronic controls . 23
7.7 Long-term performance for electronic controls . 23
7.8 Data exchange . 24
7.101 Function of the PSD. 25
8 Electrical requirements . 31
8.1 General . 31
8.2 Protection by enclosure . 32
9 Electromagnetic compatibility (EMC) . 32
9.1 Protection against environmental influences . 32
9.2 Supply voltage variations below 85 % of rated voltage . 34
9.3 Voltage dips and interruptions . 34
9.4 Supply frequency variations . 34
9.5 Surge immunity tests . 34
9.6 Electrical fast transient/burst . 34
9.7 Immunity to conducted disturbances induced by radio frequency fields . 34
9.8 Immunity to radiated disturbances induced by radio frequency fields. 34
9.9 Electrostatic discharge tests . 34
9.10 Power frequency magnetic field immunity tests . 35
9.11 Harmonics and interharmonics including mains signalling at AC power port, low
frequency immunity tests . 35
10 Marking, instructions . 35
10.1 Marking . 35
10.2 Instructions . 36
10.3 Warning notice . 36
Annex A (informative) Abbreviations and Symbols . 37
Annex B (informative) Leak-tightness test for gas controls – volumetric method . 38
Annex C (informative) Leak-tightness test for gas controls – pressure loss method . 39
Annex D (normative) Calculation of pressure loss into leakage rate . 40
Annex E (normative) Electrical/electronic component fault modes . 41
Annex F (normative) Additional requirements for safety accessories and pressure
accessories as defined in EU Directive 2014/68/EU. 42
Annex G (normative) Materials for pressurized parts . 43
Annex H (normative) Additional materials for pressurized parts. 44
Annex I (normative) Requirements for controls used in DC supplied gas burners and
appliances burning gaseous or liquid fuels. 45
Annex J (normative) Method for the determination of a Safety integrity level (SIL) . 46
Annex K (normative) Method for the determination of a Performance Level (PL) . 47
Annex L (informative) Relationship between Safety Integrity Level (SIL) and Performance
Level (PL) . 48
Annex M (normative) Reset functions . 49
Annex N (informative) Guidance document on Environmental Aspects . 50
Annex O (normative) Seals of elastomer, cork and synthetic fibre mixtures . 51
Annex AA (normative) Declaration for EPSDs . 52
Annex ZA (informative) Relationship between this European Standard and the essential
requirements of EU Directive 2009/142/EC aimed to be covered . 53
Annex ZB (informative) Relationship between this European Standard and the essential
requirements of Regulation (EU) 2016/426 aimed to be covered . 54
Annex ZC (informative) Relationship between this European Standard and the essential
requirements of Directive 2014/68/EU aimed to be covered . 58
Bibliography . 59

European foreword
This document (EN 1854:2022) 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
held by BSI.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by June 2023, and conflicting national standards shall be
withdrawn at the latest by December 2025.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN 1854:2010.
a) alignment with EN 13611:2019;
b) reference to gas families removed;
c) clarification regarding classified PSD’s (Clause 3 and 4.1);
d) technical changes to subclause 6.3.2 Housing;
e) long-term performance of EPSD added (subclause 7.7);
f) new reference to thermal stress test and vibration test.
This document has been prepared under a Standardization Request given to CEN by the European
Commission and the European Free Trade Association, and supports essential requirements of EU
Regulation(s).
For relationship with EU Regulation(s), see informative Annex ZB, which is an integral part of this
document.
Any feedback and questions on this document should be directed to the users’ national standards body.
A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organisations of the
following countries are bound to implement this European Standard: 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, Türkiye and the
United Kingdom.
Introduction
This document is intended to be used in conjunction with EN 13611:2019.
This document refers to clauses of EN 13611:2019 or adapts clauses 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. Subclauses which are additional to those in EN 13611:2019 are numbered starting from
101. Additional Annexes are designated as Annex AA, Annex BB, Annex CC, etc. It should be noted that
these clauses, subclauses and Annexes are not indicated as an addition.
If by reference to EN 13611:2019 the term “control” is given, this term should be read as “pressure
sensing device”.
1 Scope
EN 13611:2019, Clause 1 applies with the following modification:
Modification:
st
The 1 paragraph of EN 13611:2019, Clause 1 is replaced by:
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.
This document is applicable to pressure sensing devices for gaseous fuels, air, or combustion products
with declared maximum inlet pressures up to and including 500 kPa.
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.
th
EN 13611:2019 Clause 1, 4 paragraph is not applicable.
2 Normative references
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
fuels — General requirements
EN 60529:1991 , Degrees of protection provided by enclosures (IP Code) (IEC 60529:1989)
EN 60730-2-6:2016 , Automatic electrical controls — Part 2-6: Particular requirements for automatic
electrical pressure sensing controls including mechanical requirements (IEC 60730-2-6:2015)
EN ISO 75-1:2020, Plastics — Determination of temperature of deflection under load — Part 1: General
test method (ISO 75-1:2020)
EN IEC 61058-1:2018, Switches for appliances — Part 1: General requirements (IEC 61058-1:2016)

As amended by EN 13611:2019/AC:2021.
As amended by EN 60529:1991/A1:2000 and EN 60529:1991/A2:2013 (EN 60529:1991/A2:2013/AC:2019-02), and
corrected by EN 60529:1991/AC:2016-12 and EN 60529:1991/corrigendum May 1993.
As amended by EN 60730-2-6:2016/A1:2020.
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 13611:2019 and the following
apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
• ISO Online browsing platform: available at https://www.iso.org/obp
• IEC Electropedia: available at https://www.electropedia.org/
3.101
pressure sensing device
PSD
device which senses pressure and provides a signal
Note 1 to entry: Different types of PSDs are given in Figures 1 to 3.

Key
1 sensing element
2 inlet 1
3 inlet 2/reference
Figure 1 — Differential PSD
Key
1 sensing element
2 inlet 1
3 reference
Figure 2 — Atmospheric PSD
Key
1 sensing element
2 inlet 1
Figure 3 — Absolute PSD
3.101.1
electromechanical pressure sensing device
MPSD (PSD-M, PSD-S)
assembly of mechanical based pressure sensing element and one or more electrical switches
3.101.2
electronic pressure sensing device
EPSD
assembly of electronic based pressure sensing element and signal conditioner
Note 1 to entry: Figure 4 clarifies the EPSD.

Key
1 EPSD
2 central unit e.g. burner control system
3 electronic pressure sensing element
4 signal conditioner
5 interface
6 switching output
Figure 4 — EPSD
3.102
set point
pressure to which the PSD is adjusted to operate
3.103
switching pressure
inlet pressure at which the PSD operates
3.104
set point range
declared range of adjustment of the MPSD between the highest and lowest set points
3.105
upper switching pressure
pressure at which the PSD operates during an increase in pressure
3.106
lower switching pressure
pressure at which the PSD operates during a decrease in pressure
3.107
electronic pressure sensing element
part of the EPSD, which transforms the signal to be sensed (e.g. pressure) to another physical value (e.g.
force, voltage)
3.108
signal conditioner
transforms the signal from the sensing element into the output signal of the EPSD
Note 1 to entry: The signal conditioner may consist of functional electronics as well as electronics which cause
the sensor output to be classified as Class B or C in accordance with 4.3.
3.109
response time
time counted at an EPSD from start of the step change input signal (e.g. pressure) until the output signal
(e.g. voltage, current) is within the settling tolerance for the first time
Note 1 to entry: For further information refer to Figure 5.

Key
1 step function (y1) 5 steady-state value
2 step response (y2) 6 response time
3 overshoot value 7 settling time
4 settling tolerance t time
Figure 5 — Step response of EPSD
3.110
step response
output signal change of an EPSD having a step change input signal
3.111
steady state value
value of the output signal of an EPSD after step response input remains constant
3.112
settling tolerance
maximum difference between the current output signal of an EPSD and its steady-state value as stated
in the instructions
3.113
settling time
time counted from start of the step change input signal until the output signal of an EPSD remains
within the settling tolerance
3.114
overshoot value
biggest deviation between the output signal of an EPSD and its steady-state value after step change of
the inlet signal exceeding the settling tolerance for the first time
3.115
withstand pressure
pressure at a PSD that is withstood without degraded characteristic after returning below the maximum
inlet pressure
Note 1 to entry: The withstand pressure can be equal to the maximum inlet pressure.
3.116
deviation
difference between the declared or indicated set point of a PSD and the pressure measured before the
endurance test
3.117
drift

difference between the switching pressures, measured before and after the endurance test
Note 1 to entry: For illustration refer to Figure 6 and Figure 8.
Note 2 to entry: For MPSD see 7.101.1.3.
3.118
drift

the positive or negative shift of the sensor characteristic, measured before and after the thermal stress
test
Note 1 to entry: For illustration refer to Figure 6 and Figure 8.
Note 2 to entry: For EPSD see 7.101.2.5.
3.119
repeatability
ability of an EPSD to provide similar output for repeated operation
3.120
hysteresis
greatest differences of a PSD between the upscale and downscale output readings or upper and lower
switching pressure at one point or the greatest difference between the ascending and the descending
line of the characteristic
Note 1 to entry: For illustration refer to Figure 6 and Figure 7.
Note 2 to entry: For MPSD see 7.101.1.4 for EPSD see 7.101.2.4.

Key
1 minimum inlet pressure 8 drift
2 maximum inlet pressure 9 hysteresis
3 withstand pressure 10 lowest set point
4 set point 11 highest set point
5 switching pressure (before endurance) 12 set point range
6 switching pressure (after endurance) X inlet pressure/ differential pressure
7 deviation
Figure 6 — Clarification of definitions for a PSD
Key
1 hysteresis
2 maximum inlet pressure
3 withstand pressure
X inlet pressure/ differential pressure
Y output signal
Figure 7 — Clarifications of hysteresis, maximum inlet and withstand pressure for a PSD

Key
1 drift
2 transfer ratio
3 linearity
4 offset
X inlet pressure/ differential pressure
Y output signal
Figure 8 — Clarifications of drift, transfer ratio, linearity and offset for a PSD
3.121
transfer ratio
positive or negative rotation of an EPSD characteristic with the point of rotation as the intersection of
the characteristic and the inlet pressure / differential pressure
Note 1 to entry: For illustration refer to Figure 8.
3.122
linearity
worst case deviation of straightness of the actual transfer function of an EPSD from the ideal straight
line
Note 1 to entry: For illustration refer to Figure 8.
3.123
offset
positive or negative deviation of the intersection of the sensor characteristic of an EPSD and the output
signal
Note 1 to entry: For illustration refer Figure 8.
3.124
resolution
minimum incremental output change of an EPSD
3.125
safe state
state of the EPSD providing a signal (status) which is intended to ensure a safe situation of subsequent
controls
4 Classification
4.1 Classes of control
EN 13611:2019, 4.1 is replaced by the following:
Pressure sensing devices (PSDs) are classified as:
— Electromechanical pressure sensing device (MPSD)
— PSD-M, being an electromechanical pressure sensing device;
— PSD-S, for steam boilers, being a PSD-M meeting increased requirements;
— Electronic pressure sensing device (EPSD), including devices with variable output.
4.2 Groups of control
Shall be according to EN 13611:2019, 4.2 with the following modification:
Group 2 controls are not applicable for PSDs.
4.3 Classes of control functions
Shall be according to EN 13611:2019, 4.3 with the following addition:
— MPSDs are not classified according to Class A, B or C control function;
— EPSDs are classified as Class A, Class B or Class C control function.
4.4 Types of DC supplied controls
Shall be according to EN 13611:2019, 4.4.
5 Test conditions and uncertainty of measurements
Shall be according to EN 13611:2019, Clause 5.
6 Design and construction
6.1 General
Shall be according to EN 13611:2019, 6.1 with the following modification and addition:
Modification:
rd
EN 13611:2019 6.1, 3 paragraph is not applicable.
Addition:
Clause 6 is applicable for PSDs unless stated otherwise.
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, PSDs shall comply with the requirements of this
document with the exception of 7.101.
The declared pressures can be positive or negative pressures.
6.2 Mechanical parts of the control
6.2.1 Appearance
Shall be according to EN 13611:2019, 6.2.1.
6.2.2 Holes
Shall be according to EN 13611:2019, 6.2.2 with the following modification:
This requirement only applies to PSDs designed for gaseous fuels.
6.2.3 Breather holes
6.2.3.1 Requirements
Shall be according to EN 13611:2019, 6.2.3.1 with the following modification:
This requirement only applies to PSDs designed for gaseous fuels and combustion products.
The requirements of this clause are not applicable for PSDs with a maximum inlet pressure up to and
including 100 kPa, which fulfil the requirements of 6.3.2.1.
6.2.3.2 Test for leakage of breather holes
Shall be according to EN 13611:2019, 6.2.3.2 with the following modification:
Use the withstand pressure instead of the maximum inlet pressure.
6.2.4 Screwed fastenings
Shall be according to EN 13611:2019, 6.2.4 with the following modification:
This requirement only applies to PSDs designed for gaseous fuels.
6.2.5 Jointing
Shall be according to EN 13611:2019, 6.2.5 with the following modification:
This requirement only applies to PSDs designed for gaseous fuels.
6.2.6 Moving parts
Shall be according to EN 13611:2019, 6.2.6.
6.2.7 Sealing caps
Shall be according to EN 13611:2019, 6.2.7.
6.2.8 Dismantling and reassembly
Shall be according to EN 13611:2019, 6.2.8.
6.2.9 Auxiliary canals and orifices
Shall be according to EN 13611:2019, 6.2.9 with the following modification:
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
measures, e.g. external filters (see 10.2, h)).
6.2.10 Presetting device
Shall be according to EN 13611:2019, 6.2.10.
6.2.101 Manual reset
If a manual reset function is provided the reset action shall be independent of manipulation or position
of the reset member.
NOTE Manual reset can require the use of a tool.
6.2.102 Sensed medium
In the instructions shall be declared the nature of the sensed medium for which the PSD is designed.
6.2.103 PSD-S
The additional construction requirements for PSD-S shall be as follows:
a) switching parts shall have the characteristics of a snap-acting contact as described in
EN IEC 61058-1:2018, 13.2 and 13.3;
b) reed relays or reed contacts shall not be used;
c) pressure-stressed measurement parts shall be manufactured from materials resistant to corrosion
for the intended use;
d) maximum declared ambient temperature shall be ≥ 70 °C;
e) IP44 shall be met as a minimum according to EN 60529:1991.
6.3 Materials
6.3.1 General material requirements
Shall be according to EN 13611:2019, 6.3.1.
6.3.2 Housing
6.3.2.1 Requirements
EN 13611:2019, 6.3.2.1 shall be replaced by the following:
Parts of the housing which directly or indirectly separate a gas-carrying compartment from atmosphere
shall be made from:
a) metallic materials that have a melting point (solidus temperature) of at least 427 °C, or
b) metallic materials that conform to 6.3.3, or
c) non-metallic materials for PSDs with a withstand pressure up to and including 100 kPa provided
that:
1) these gas carrying compartments are protected from the gas supply by a metallically housed
metallic flow restrictor of less than 1 mm diameter; and
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
withstand pressure, when tested according to 6.3.2.2 a).
NOTE When inside the housing a diaphragm separates the gas-carrying compartment from atmosphere than
this is considered to be indirectly separated.
6.3.2.2 Test
EN 13611:2019, 6.2.3.2 shall be replaced by the following:
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
leakage rate.
b) For PSDs with a withstand pressure up to and including 100 kPa the following test applies:
— leave the PSD diaphragm as is;
— store one PSD for 1 h ± 5 min at 135 °C ± 2 °C ambient temperature;
— keep the PSD at this temperature and apply a pressure of three times the withstand pressure to
gas-carrying compartments for 5 min ± 10 s;
— wait for the PSD to return to room temperature;
— pressurize the pressure ports of the PSD to the withstand pressure or 1,5 times the maximum
inlet pressure, whichever is greater;
— measure the external leakage rate according to 7.2.
NOTE For the purpose of this test, the parts which provide the metallically housed metallic flow restrictor
according to 6.3.2.1 c) 1) are considered being part of the PSD.
6.3.3 Zinc alloys
Shall be according to EN 13611:2019, 6.3.3.
6.3.4 Springs
EN 13611:2019, 6.3.4 is not applicable.
6.3.5 Resistance to corrosion and surface protection
Shall be according to EN 13611:2019, 6.3.5.
6.3.6 Impregnation
Shall be according to EN 13611:2019, 6.3.6.
6.3.7 Seals for glands for moving parts
Shall be according to EN 13611:2019, 6.3.7.
6.3.101 Plastics materials
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 75-1:2020 (Method A, 1,8 MPa load) and by reference to the plastics’ data sheet.
6.4 Gas connections
6.4.1 Making connections
Shall be according to EN 13611:2019, 6.4.1 with the following modification:
This requirement only applies to PSDs designed for gaseous fuels.
6.4.2 Connection sizes
Shall be according to EN 13611:2019, 6.4.2 with the following modification:
This requirement only applies to PSDs designed for gaseous fuels.
6.4.3 Threads
Shall be according to EN 13611:2019, 6.4.3 with the following modification:
This requirement only applies to PSDs designed for gaseous fuels.
6.4.4 Union joints
Shall be according to EN 13611:2019, 6.4.4 with the following modification:
This requirement only applies to PSDs designed for gaseous fuels.
6.4.5 Flanges
Shall be according to EN 13611:2019, 6.4.5 with the following modification:
This requirement only applies to PSDs designed for gaseous fuels.
6.4.6 Compression fittings
Shall be according to EN 13611:2019, 6.4.6 with the following modification:
This requirement only applies to PSDs designed for gaseous fuels.
6.4.7 Nipples for pressure test
Shall be according to EN 13611:2019, 6.4.7 with the following modification:
This requirement only applies to PSDs designed for gaseous fuels.
6.4.8 Strainers
EN 13611:2019, 6.4.8 is not applicable.
6.4.101 Connections for PSDs specified for air and combustion products
For PSDs only suitable for air and combustion products, connections shall be as stated in the
instructions, however threads, flanges or compression fittings (if used) shall be in accordance with
EN 13611:2019, 6.4.1 to 6.4.6. Push-fit connections shall not be used for PSDs for maximum inlet
pressures greater than 50 kPa.
6.5 Electrical parts of the control
6.5.1 General
Shall be according to EN 13611:2019, 6.5.1 with the following addition:
A method for the assessment of EPSDs is defined in 6.6. In the instructions shall be declared the class of
control function according to the intended application.
For EPSD technologies not specified in this document, 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 document. 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 document, this is a set of conditions under which the new technology
can be used in an EPSD.
6.5.2 Switching elements
EN 13611:2019, 6.5.2. is not applicable.
6.5.3 Electrical components
6.5.3.1 Performance of electrical components
Shall be according to EN 13611:2019, 6.5.3.1.
6.5.3.2 Tests
Shall be according to EN 13611:2019, 6.5.3.2.
6.5.3.3 Sensing element
Shall be according to EN 13611:2019, 6.5.3.3.
6.5.3.4 Gas controls employing electrical components in the gas circuit
Shall be according to EN 13611:2019, 6.5.3.4 with the following modification:
This requirement only applies to PSDs designed for gaseous fuels.
6.6 Protection against internal faults for the purpose of functional safety
6.6.1 Design and construction requirements
Shall be according to EN 13611:2019, 6.6.1. with the following addition:
Whenever the terms lock-out or safety shutdown are used within EN 13611:2019, 6.6.3 and 6.6.4, they
shall be replaced by the term safe state.
6.6.2 Class A
Shall be according to EN 13611:2019, 6.6.2.
6.6.3 Class B
6.6.3.1 Design and construction requirements
Shall be according to EN 13611:2019, 6.6.3.1 with the following addition:
For the purpose of the fault assessment the effect of internal failures in accordance with Annex AA shall
also be considered.
6.6.3.2 First fault
Shall be according to EN 13611:2019, 6.6.3.2 with the following modification and addition:
Modification:
EN 13611:2019, 6.6.3.2 c) is not applicable.
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
EN 13611:2019, 6.6.3.2 a), b) and d) are applicable for the total function (i.e. EPSD and central unit), the
EPSD instruction shall specify the safe state in analogy with the requirements in EN 13611:2019,
6.6.3.2 a), b) and d).
If EN 13611:2019, 6.6.3.2 d) applies (continues to operate) the EPSD shall continue to function in
accordance with the performance requirements as specified in Clause 7, especially with 7.101.2.
6.6.3.3 Fault introduced during lock-out or safety-shutdown
Shall be according to EN 13611:2019, 6.6.3.3.
6.6.4 Class C
6.6.4.1 Design and construction requirements
Shall be according to EN 13611:2019, 6.6.4.1 with the following addition:
For the purpose of the fault assessment the effect of internal failures in accordance with Annex AA shall
also be considered.
6.6.4.2 First fault
Shall be according to EN 13611:2019, 6.6.4.2 with the following modification and addition:
Modification:
EN 13611:2019, 6.6.4.2, c) is not applicable.
Addition:
The fault reaction time shall be stated in the instructions.
The instructions shall provide the output signal(s) representing the safe state(s). As the safe state(s),
specified in EN 13611:2019, 6.6.4.2, a), b) and d) are applicable for the total function (i.e. EPSD and
central unit), the EPSD instructions shall specify the safe state in analogy with the requirements in
EN 13611:2019, 6.6.4.2, a), b) and d).
If EN 13611:2019, 6.6.4.2, d) applies (continues to operate) the EPSD shall continue to function in
accordance with the performance requirements as specified in Clause 7, especially with 7.101.2.
6.6.4.3 Second fault
Shall be according to EN 13611:2019, 6.6.4.3 with the following modification:
EN 13611:2019, 6.6.4.3, a) is not applicable.
6.6.4.4 Fault introduced during lock-out or safety-shutdown
Shall be according to EN 13611:2019, 6.6.4.4.
6.6.5 Circuit and construction evaluation
Shall be according to EN 13611:2019, 6.6.5.
7 Performance
7.1 General
Shall be according to EN 13611:2019, 7.1 with the following addition:
If there is a mounting position(s) stated in the instructions where the PSD cannot operate from
minimum inlet pressure to the maximum inlet pressure, the range of inlet pressures for that mounting
position(s) shall be stated separately.
7.2 Leak-tightness
7.2.1 Requirements
Shall be according to EN 13611:2019, 7.2.1 with the following modification and addition:
Modification:
Internal leakage is not applicable for PSDs.
Addition:
For the external leakage rates for PSDs designed for air and combustion products use Table 1.
Table 1 — Maximum external leakage rates for air/combustion products
Maximum inlet pressure Maximum leakage rates (air)
kPa cm /h
≤ 100 kPa 200
> 100 kPa 1 000
NOTE The test for air and combustion products is performed to exclude the influence on the measured signal
and to limit the spillage of combustion products to ambient.
7.2.2 Tests
7.2.2.1 General
Shall be according to EN 13611:2019, 7.2.2.1 with the following addition:
Use the withstand pressure instead of the maximum inlet pressure.
For PSDs for air and combustion products, the lowest test pressure shall be 1,5 times the maximum
inlet pressure.
For differential PSDs for gaseous fuels, the external leakage rate is tested separately on inlet 1 and on
inlet 2/reference, in order to include leakage through the diaphragm.
7.2.2.2 External leak-tightness
Shall be according to EN 13611:2019, 7.2.2.2.
7.2.2.3 Internal leak-tightness
EN 13611:2019, 7.2.2.3 is not applicable.
7.2.2.4 Burst pressure test (only applicable for PSD-S)
A pressure of four times the maximum switching pressure is applied to the PSD-S at the maximum
ambient temperature for a minimum of 5 min. Following this, the PSD-S is cooled to (20 ± 5) °C and the
leak-tightness is checked against the requirements of 7.2.1
This test is not applicable if 1,5 times the withstand pressure is greater than four times the maximum
switching pressure.
7.3 Torsion and bending
7.3.1 General
Shall be according to EN 13611:2019, 7.3.1.
7.3.2 Torsion and bending moments
7.3.2.1 Requirements
Shall be according to EN 13611:2019, 7.3.2.1 with the following modification:
PSDs shall withstand the torque given in EN 13611:2019, Table 4 when tested according to 7.3.2.2.
7.3.2.2 Tests
7.3.2.2.1 General
Shall be according to EN 13611:2019 7.3.2.2.1.
7.3.2.2.2 10 s torsion test – Group 1 and Group 2 gas controls with threaded connections
EN 13611:2019, 7.3.2.2.2 is replaced by the following:
The test shall be performed using the following instructions:
a) screw the pipe with a torque, not exceeding the torque given in EN 13611:2019, Table 4, into the
PSD. Clamp the pipe at a distance equal to or greater than 2 DN from the PSD;
b) ensure the joint is leak-tight;
c) support the PSD so that no bending moment is applied to the PSD;
d) apply the torque to the spanner flats progressively and smoothly without undue delay and apply
the required torque to the PSD for 10 s. The torque given in EN 13611:2019, Table 4 shall not be
exceeded;
e) with the torque removed, the PSD shall comply with 7.2.1 and no deformation shall be visible.
7.3.2.2.3 10 s torsion test – Group 1 and Group 2 gas controls with compression joints
7.3.2.2.3.1 Olive-type compression joints
Shall be according to EN 13611:2019, 7.3.2.2.3.1 with the following addition:
The test conditions of 7.3.2.2.2 shall be taken into account.
7.3.2.2.3.2 Flare and fibre seal compression joints
Shall be according to EN 13611:2019, 7.3.2.2.3.2 with the following addition:
The test conditions of 7.3.2.2.2 shall be taken into account.
7.3.2.2.3.3 Flanged or saddle-clamp inlet connections for attachment to cooking appliance gas
manifolds
EN 13611:2019, 7.3.2.2.3.3 is not applicable.
7.3.2.2.3.101 Flanged connections
For the purpose of the torsion test, flanged connections are treated as threaded connections.
7.3.2.2.4 10 s bending moment test – Group 1 and Group 2 gas controls
EN 13611:2019, 7.3.2.2.4 is not applicable.
7.3.2.2.5 900 s bending moment test – Group 1 gas controls only
EN 13611:2019, 7.3.2.2.5 is not applicable.
7.4 Rated flow rate
EN 13611:2019, 7.4 is not applicable.
7.5 Durability
7.5.1
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