EN 50194-1:2009

SLOVENSKI STANDARD
01-september-2009
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SIST EN 50194:2000
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Electrical apparatus for the detection of combustible gases in domestic premises -- Part
1: Test methods and performance requirements
Elektrische Geräte für die Detektion von brennbaren Gasen in Wohnhäusern -- Teil 1:
Prüfverfahren und Anforderungen an das Betriebsverhalten
Appareils électriques pour la détection des gaz combustibles dans les locaux
domestiques -- Partie 1 : Méthodes d'essai et exigences d'aptitude à la fonction
Ta slovenski standard je istoveten z: EN 50194-1:2009
ICS:
13.320 Alarmni in opozorilni sistemi Alarm and warning systems
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 50194-1
NORME EUROPÉENNE
January 2009
EUROPÄISCHE NORM
ICS 13.320 Supersedes EN 50194:2000

English version
Electrical apparatus for the detection
of combustible gases in domestic premises -
Part 1: Test methods and performance requirements

Appareils électriques  Elektrische Geräte
pour la détection des gaz combustibles für die Detektion von brennbaren Gasen
dans les locaux domestiques - in Wohnhäusern -
Partie 1: Méthodes d'essai Teil 1: Prüfverfahren und Anforderungen
et exigences d'aptitude à la fonction an das Betriebsverhalten

This European Standard was approved by CENELEC on 2008-09-01. CENELEC 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 Central Secretariat or to any CENELEC 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 CENELEC member into its own language and notified
to the Central Secretariat has the same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Cyprus, the
Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

Central Secretariat: avenue Marnix 17, B - 1000 Brussels

© 2009 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 50194-1:2009 E
Foreword
This European Standard was prepared by the Technical Committee CENELEC TC 216, Gas detectors.
The text of the draft was submitted to the Unique Acceptance Procedure and was approved by
CENELEC as EN 50194-1 on 2008-09-01.
This European Standard supersedes EN 50194:2000.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2009-09-01

– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2011-09-01

__________
- 3 - EN 50194-1:2009
Contents
1 Scope . 4
2 Normative references . 4
3 Definitions . 5
4 General requirements . 6
4.1 General . 6
4.2 Construction . 7
4.3 Indicators and alarms . 7
4.4 Fault signals . 8
4.5 Output signal (applicable for Type A apparatus only) . 8
4.6 Labelling and instructions . 8
5 Test and performance requirements . 10
5.1 General requirements for tests. 10
5.2 Normal conditions for tests . 11
5.3 Test methods and performance requirements . 12
6 Self-contained battery powered apparatus . 16
6.1 Battery fault warning . 16
6.2 Battery capacity . 17
6.3 Battery reversal . 17
6.4 Battery connections . 18
Annex A (informative) Location of the gas detection apparatus - Guide for writing the
instruction booklet . 20
Annex B (informative) Emergency actions - Guide for writing the instruction booklet . 21
Annex C (informative) A-deviations . 22
Figure 1 – Sound level test . 19
Table 1 – Construction requirements . 8

1 Scope
This European Standard specifies general requirements for the construction, testing and performance
of electrically operated apparatus for the detection of combustible gases, designed for continuous
operation in a fixed installation in domestic premises. The apparatus may be mains or battery powered.
Additional requirements for apparatus to be used in recreational vehicles and similar premises are
specified in EN 50194-2.
NOTE 1  For caravan holiday homes EN 50194-1 applies.
This European Standard specifies two types of apparatus to operate in the event of an escape of town
gas, natural gas or liquefied petroleum gas (LPG):
- Type A apparatus - to provide a visual and audible alarm and an executive action in the form of an
output signal that may actuate directly or indirectly a shut-off device and/or other ancillary device;
- Type B apparatus - to provide a visual and audible alarm only.
This European Standard excludes apparatus for the detection of toxic hazards of gases such as
carbon monoxide (see EN 50291-1 and EN 50291-2).
Apparatus complying with this standard is not considered suitable for industrial or commercial
installations for which EN 60079-29-1 apply.
NOTE 2  Apparatus tested in accordance with EN 60079-29-1 will not necessarily comply with this European Standard.
2 Normative references
The following referenced documents are indispensable for the application 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 437 1993 Appliances using combustible gases - Test gases, test pressure and
categories of appliances
EN 1775 2007 Gas supply - Gas pipework for buildings - Maximum operating pressure less
than or equal to 5 bar - Functional recommendations
EN 50244 2000 Electrical apparatus for the detection of combustible gases in domestic
premises - Guide on the selection, installation, use and maintenance
EN 50270 2006 Electromagnetic compatibility - Electrical apparatus for the detection and
measurement of combustible gases, toxic gases or oxygen
EN 50291 2001 Electrical apparatus for the detection of carbon monoxide in domestic
premises - Test methods and performance requirements
EN 60079-29-1 2007 Explosive atmospheres - Part 29-1: Gas detectors - Performance
requirements of detectors for flammable gases
(IEC 60079-29-1:2007, modified)

EN 60335-1 2002 Household and similar electrical appliances - Safety - Part 1: General
requirements (IEC 60335-1:2001, modified)
EN 60529 1991 Degrees of protection provided by enclosures (IP Code) (IEC 60529:1989)
EN 60704-1 1997 Household and similar electrical appliances - Test code for the determination
of airborne acoustical noise - Part 1: General requirements
(IEC 60704-1:1997)
- 5 - EN 50194-1:2009
3 Definitions
For the purposes of this European Standard the following definitions apply:
3.1
ambient air
the normal atmosphere surrounding the apparatus
3.2
clean air
air which is free from combustible gases, interfering and contaminating substances
3.3
domestic premises
any house or building being the place of residence or home of a household, family or person
3.4
fixed installation
an apparatus which is intended to have all parts except replaceable batteries permanently installed
3.5
latching alarm
an alarm which, once activated, requires deliberate action for resetting
3.6
lower explosive limit (LEL)
the volume ratio of flammable gas or vapour in air below which an explosive gas atmosphere will not
be formed
NOTE  Annex A of EN 61779-1:2000 gives a list of flammability levels which are the internationally agreed basis for the type
testing of devices. National regulations may use differing values for the LEL of some substances (for example the values for
methane and propane, which were specified in older European Standards).
3.7
sensor
an assembly in which the sensing element is housed and which may contain associated circuit
components
3.8
sensing element
a device, the output of which will change in the presence of combustible gas
3.9
volume ratio (v/v)
ratio of the volume of a component to the volume of the gas mixture
3.10
output signal
signal characterized by a standby state and an activated state by which action may be initiated (for
example, triggering of a shut-off device)
3.11
alarm set point
a fixed setting of the apparatus that determines the volume ratio of combustible gas at which the
apparatus will automatically initiate an alarm and for Type A apparatus, an output signal

3.12
gas detection apparatus
apparatus comprising the sensor, remote sensor if applicable, alarm and other circuit components,
power supply and for Type A apparatus a means of providing an output signal
3.13
fault signal
a visual or audible signal indicating a faulty or failed apparatus
3.14
LPG
butane, propane or mixtures thereof
3.15
mains powered apparatus
an apparatus designed to be powered by the domestic mains electrical supply, with or without
additional power source
3.16
self contained battery powered apparatus
apparatus provided with an internal battery to provide the necessary amount of energy for a predefined
duration of operation
3.17
warm-up time
the time interval between the time when the apparatus is switched on and the time when the apparatus
is fully operational
3.18
continuous operation
apparatus which is continuously powered with continuous or intermittent automatic sensing
3.19
recreational vehicle
recreational vehicles considered by this standard include recreational craft, caravans and motor
caravans
NOTE Other motorised vehicles like trucks are known to have residential accommodation. They are not recreational vehicles
but are considered as similar premises in respect of this standard.

3.20
caravan holiday home
transportable leisure accommodation vehicle that does not meet requirements for construction and use
of road vehicles, that retains means for mobility and that is for temporary or seasonal occupation [from
EN 13878]
4 General requirements
4.1 General
Unless otherwise stated, the requirements specified are applicable to both Type A and Type B
apparatus.
The apparatus shall reliably detect the presence of combustible gas in domestic premises under the
stated application conditions, shall produce an alarm, and in the case of Type A apparatus, shall be
able to initiate executive actions whenever the level exceeds a preset alarm volume ratio.

- 7 - EN 50194-1:2009
The apparatus, electrical assemblies and components shall comply with the construction requirements
of 4.2 to 4.6 and the test and performance requirements of Clause 5. Apparatus shall be designed for
fixed installation and continuous operation. The apparatus shall not be class 0 as defined in
EN 60335-1:2002, 3.3.7.
When replaceable, the sensor as defined under 3.7 shall guarantee the same constructional
characteristics and functions as the previous sensor without modifying the internal detector in such a
way as to keep unchanged the compliance of the detector to all the requirements of this standard. The
above condition sh
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