Bsi bs en 00449 2002 + a1 2007

BRITISH STANDARD

Specification for
dedicated liquefied
petroleum gas
appliances — Domestic
flueless space heaters
(including diffusive
catalytic combustion
heaters)

ICS 97.100.20

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BS EN
449:2002
+A1:2007


BS EN 449:2002+A1:2007

National foreword
This British Standard is the UK implementation of EN 449:2002+A1:2007. It
supersedes BS EN 449:2002 which is withdrawn.
The start and finish of text introduced or altered by amendment is indicated in
the text by tags. Tags indicating changes to CEN text carry the number of the
CEN amendment. For example, text altered by CEN amendment A1 is
indicated by !".
The UK participation in its preparation was entrusted to Technical Committee
GSE/24, Dedicated LPG appliances.

A list of organizations represented on this committee can be obtained on
request to its secretary.
This publication does not purport to include all the necessary provisions of a
contract. Users are responsible for its correct application.
Compliance with a British Standard cannot confer immunity from
legal obligations.

This British Standard was
published under the authority
of the Standards Policy and
Strategy Committee
on 4 December 2002

Amendments/corrigenda issued since publication
Date

Comments

30 June 2008

Implementation of CEN amendment A1:2007

© BSI 2008

ISBN 978 0 580 62033 1

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EUROPEAN STANDARD

EN 449:2002+A1

NORME EUROPÉENNE
EUROPÄISCHE NORM

November 2007

ICS 97.100.20

Supersedes EN 449:2002

English Version

Specification for dedicated liquefied petroleum gas appliances Domestic flueless space heaters (including diffusive catalytic
combustion heaters)
Spécifications pour les appareils fonctionnant
exclusivement aux gaz de pétrole liquéfiés - Appareils de
chauffage domestiques non raccordés (y compris les
appareils de chauffage à combustion catalytique diffusive)

Festlegungen für Flüssiggasgeräte - Abzuglose
Haushaltsraumheizgeräte (einschließlich Heizgeräte mit
diffusiver katalytischer Verbrennung)

This European Standard was approved by CEN on 9 September 2002 and includes Amendment 1 approved by CEN on 27 September
2007.
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 Management Centre or to any CEN member.

ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ

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 Management Centre has the same status as the
official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG

Management Centre: rue de Stassart, 36

© 2007 CEN

All rights of exploitation in any form and by any means reserved
worldwide for CEN national Members.

B-1050 Brussels

Ref. No. EN 449:2002+A1:2007: E


BS EN 449:2002+A1:2007
EN 449:2002+A1:2007 (E)

Contents

page
Foreword......................................................................................................................................................................3
1

Scope ..............................................................................................................................................................4

2

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

3

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

4

Classification................................................................................................................................................10

5

Safety and constructional requirements ...................................................................................................11

6

Test methods................................................................................................................................................21

7

Marking and instructions ............................................................................................................................37

Annex A (normative) Special national conditions ................................................................................................43
Annex B (normative) Vitiation room.......................................................................................................................49
Annex C (informative) Air supply and ventilation – Using recommendations...................................................51
Annex ZA (informative) Clauses of this European Standard addressing essential requirements or
other provisions of EU Directives. .............................................................................................................52

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2

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BS EN 449:2002+A1:2007
EN 449:2002+A1:2007 (E)

Foreword
This document (EN 449:2002+A1:2007) has been prepared by Technical Committee CEN/TC 181 "Dedicated
liquefied petroleum gas appliances", the secretariat of which is held by AFNOR.
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 May 2008, and conflicting national standards shall be withdrawn at the latest by
May 2008.
This document supersedes !EN 449:2002".
This document includes Amendment 1, approved by CEN on 2007-09-27.
The start and finish of text introduced or altered by amendment is indicated in the text by tags !".
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 ZA, which is an integral part of this document.
!deleted text"
Items relating to quality assurance systems, production testing and particularly certificates of conformity of auxiliary

equipment are not covered by this standard.

ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ

According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden,
Switzerland and the United Kingdom.

3


BS EN 449:2002+A1:2007
EN 449:2002+A1:2007 (E)

1

Scope

This European Standard specifies the requirements, the test methods and the marking of domestic flueless space
heaters, including diffusive catalytic combustion heaters, having a nominal heat input (Hs), not exceeding 4,2 kW
burning 3rd family gases at nominal operating pressures not exceeding 50 mbar, referred to in the text as
'appliances'.
This European Standard is applicable to the following types of appliances:
a) fixed heaters burning commercial butane and/or commercial propane;
b) portable or mobile heaters burning either commercial butane, or, commercial butane and commercial propane
including those that incorporate a LPG container installation compartment for a transportable refillable liquefied
petroleum LPG container.
There are no specific thermal efficiency requirements appropriate to these types of appliance as:

c) all the heat produced by the combustion process is released into the space to be heated;
d) the requirements with regard to the combustion performance, which is a safety matter, ensure the effective
burning of the fuel gas.
It does not cover appliances incorporating electrically operated gas control systems.
Annex A gives the details of the categories of appliances marketed in various countries.

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Requirements for appliances given in this standard assume that the supply of gas from the container will be
governed by a pressure regulator having a maximum nominal outlet pressure of 50 mbar.
This European Standard does not cover LPG containers for liquefied petroleum gas neither their associated
regulator nor tubing and flexible hoses which shall comply with national requirements in force.
This European Standard only covers type testing.

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 125, Flame supervision devices for gas burning appliances - Thermo-electric flame supervision devices
EN 126, Multifunctional controls for gas burning appliances
EN 161, Automatic shut-off valves for gas burners and gas appliances
EN 257, Mechanical thermostats for gas burning appliances
EN 437:1993, Test gases - Test pressures - Appliance categories
EN 549, Rubber materials for seals and diaphragms for gas appliances and gas equipment
EN 751-1, Sealing materials for metallic threaded joints in contact with 1st, 2nd and 3rd family gases and hot
water - Part 1: Anaerobic jointing compounds
EN 751-2, Sealing materials for metallic threaded joints in contact with 1st, 2nd and 3rd family gases and hot

water - Part 2: Non-hardening jointing compounds
4

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BS EN 449:2002+A1:2007
EN 449:2002+A1:2007 (E)

EN 1057, Copper and copper alloys - Seamless, round copper tubes for water and gas in sanitary and heating
applications
EN 60335-1:1994, Safety of household and similar electrical appliances - Part 1: General requirements (IEC
60335-1:1991, modified)
EN ISO 3166-1, Codes for the representation of names of countries and their subdivisions - Part 1: Country codes
(ISO 3166-1:1997)
ISO 7-1, Pipe threads where pressure-tight joints are made on the threads - Part 1: Dimensions, tolerances and
designation
ISO 228-1, Pipe threads where pressure-tight joints are not made on the threads - Part 1: Dimensions, tolerances
and designation
CR 1472:1997, General guidance for the marking of gas appliances
CR 1749, European scheme for the classification of gas appliances according to the method of evacuation of the
products of combustion (Types)

3

Terms and definitions

For the purposes of this European Standard, the following terms and definitions apply.
3.1
appliance incorporating a LPG container

appliance which includes a LPG container installation compartment

ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ

3.2
auxiliary equipment


tap and cocks;



flame supervision devices;



thermostats;



multifunctional controls;



automatic shut-off valves.

3.3
burner
component that allows the gas to burn.
Two types are distinguished:



non-aerated burner: in which the air for combustion is entrained entirely at the burner outlet or at the burner
surface for catalytic burners;



aerated burner in which part of the air for combustion, termed primary air, is entrained by the gas flow and
mixed before the burner outlet. The remainder of the air drawn in at the port, termed secondary air, is drawn in
after the burner outlet or at the burner surface for catalytic burners

5


BS EN 449:2002+A1:2007
EN 449:2002+A1:2007 (E)

3.4
heat input
quantity of energy used divided by time corresponding to the volumetric or mass flow rates, the calorific value used
being either the net or gross calorific value
NOTE

Q

Unit : kilowatt (kW)
[EN 437:1993]
3.5
nominal heat input
value of the heat input declared by the manufacturer

NOTE

Qn

[EN 437:1993]
3.6
volume rate
volume of gas consumed by the appliance during continuous operation divided by the operating time.
NOTE

V
3

3

Units: cubic metre per hour (m /h), litre per min (l/min), cubic decimetre per hour (dm /h) or cubic decimetre per
3
second (dm /s)
[EN 437:1993]

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3.7
mass rate
mass of gas consumed by the appliance during continuous operation divided by the operating time
NOTE

M

Units : kilogram per hour (kg/h), or gram per hour (g/h)

[EN 437:1993]
3.8
flame lift
phenomenon characterized by the partial or total movement of the base of the flame away from the burner port
3.9
relative density
ratio of the masses of equal volumes of dry gas and dry air at the same conditions of temperature and pressure :
15°°C (or 0°°C), 1 013, 25 mbar
NOTE

d

[EN 437:1993]
3.10
ignition device
device to ignite one or more burners directly or indirectly, for instance through a flash tube
it may be either electric (resistance, spark, etc.) or thermal (pilot, etc.)

6

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BS EN 449:2002+A1:2007
EN 449:2002+A1:2007 (E)

3.11
flame supervision device
device including a sensing element which causes the gas supply to a burner to be opened or closed according to
the presence or absence of the flame which activates the sensing element

3.12
Wobbe number
ratio of the calorific value of a gas per unit volume and the square root of its relative density under the same
reference conditions. The Wobbe index is said to be gross or net according to whether the calorific value used is
the gross or net calorific value.
NOTE

gross Wobbe index : Ws ; net Wobbe index : Wi.

Units: either


megajoule per cubic metre (MJ/m3) of dry gas at the reference conditions, or



megajoule per kilogram (MJ/kg) of dry gas

[EN 437:1993]
3.13
injector
component part that admits the gas into an aerated burner. There are two types of injectors:


calibrated injector: where the section of the outlet orifice is fixed ;



adjustable injector: where the section of the outlet orifice is variable

ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ

3.14
sound mechanical joint
connection device assuring soundness in an assembly made up of several parts, generally of metal
it can be:


a conical joint;



an O-ring joint;



a flat-faced joint.

3.15
tap handle
manually operated component used to open, partially open, or close a tap
3.16
primary air adjuster
device allowing the primary aeration of a burner to be set at a predetermined value according to the supply
conditions. The operation of changing the setting of this device is termed the 'adjustment of primary air'
3.17
gas rate adjuster
device allowing the gas rate to a burner to be set at a predetermined value according to the supply conditions. It
often consists of a screw, termed a 'throttle screw' or an 'adjustment screw'. The operation of changing the setting
of this device is termed the 'adjustment of the gas rate'

7


BS EN 449:2002+A1:2007
EN 449:2002+A1:2007 (E)

3.18
gross calorific value Hs
quantity of heat produced by the complete combustion, at constant pressure, of unit volume or mass of the
considered gas, the water produced by the combustion being condensed.
It is expressed in megajoules referred either to per cubic meter of dry gas measured at 15°°C at a pressure of
1 013,25 mbar or to per kg of dry gas
3.19
gas supply pressure
difference between the static pressure measured at the inlet connection of the appliance and the atmospheric
pressure
3.20
light back
phenomenon characterized by the return of the flame inside the body of the burner
3.21
tap
device to adjust the heat input during use and/or isolate the gas supply to the various burners
3.22
soft solder
solder for which the lowest temperature of the melting range, after application, is less than 450 °C
3.23
stability of flames
conditions of the flames at the burner ports when the phenomena of flame lift or light back do not occur

ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ

3.24
thermostat
device to maintain automatically a selected constant temperature. It may include a graduated scale for the
selection of the temperature
3.25
closed fronted fire
appliance in which the glowing area is substantially covered by means of a transparent or translucent screen
3.26
cold condition
condition of the appliance required for some tests and obtained by allowing the unlit appliance to attain equilibrium
at room temperature
3.27
hot condition
condition of the appliance required for some tests and obtained by heating for one hour at the normal test pressure
3.28
fixed heater
heater designed to be secured to a wall or floor
3.29
mobile heater
self-contained heater incorporating its own gas container within the body of the appliance and designed to be
moved without lifting
3.30
portable appliance
self-contained heater for connection to a gas supply by means of flexible tubing and designed to be easily carried
8

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BS EN 449:2002+A1:2007
EN 449:2002+A1:2007 (E)

3.31
atmosphere sensing device
a device that is designed to shut off the gas supply when the carbon dioxide concentration of the surrounding
atmosphere exceeds a given level. Such a device normally comprises a vitiation sensitive pilot in conjunction with a
suitable flame supervision device
3.32
catalytic unit
panel and its content, including the catalytic pad, into which the gas is injected, through which it is distributed and
oxidised, and from which the products are emitted
3.33
diffusive catalytic combustion space heater
space heating appliance in which gas diffuses through a catalytic pad and is flamelessly oxidized by oxygen that
has diffused into the pad from the surrounding atmosphere at a temperature below that at which flame combustion
would occur
NOTE
Diffusive catalytic combustion space heaters do not include catalytic combustion heaters in which pre-mixing of gas
and air is effected before the catalytic pad is reached, nor do they include appliances employing after-burners in which products
of incomplete combustion from burners are further oxidized over a catalyst.

3.34
by-pass rate
non-adjustable rate of flow through a thermostat when the valve is closed
3.35
slip
ratio of unburnt fuel gas to total hydrocarbons which have passed through the catalytic pad

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3.36
minimum operational rate
either
a)

for any burner or section of a burner that is controlled by a thermostat, the bypass rate; or

b)

for any burner that is manually controlled but where it is only possible to obtain certain predetermined fixed
settings, the lowest rate obtainable in normal use

3.37
removable
that which may only be removed with a tool
3.38
direct destination country
country for which the appliance has been certified and which is specified by the manufacturer as the intended
country of destination
[CR 1472:1997]
3.39
manufacturer
person responsible for designing and manufacturing a product covered by the directive, with a view to placing it on
the Community market on his own behalf
[CR 1472:1997]

9

BS EN 449:2002+A1:2007
EN 449:2002+A1:2007 (E)

4
4.1

Classification
Classification of gases

Gases likely to be used are classified in families according to the value of their Wobbe number. Table 1 details the
family and groups relevant for this standard.
Table 1 — Classification of gases

4.2

Gas families and groups
3rd Family Gases

Wobbe Number
MJ/m3 (Hs at 15 oC)

Group B/P

between 72,9 and 87,3

Group P

between 72,9 and 76,8

Group B

between 81,8 and 87,3

Classification of appliances according to the supply gases and pressures

Appliances are classified into categories according to the gases and pressures that they are designed to use.
However, for each country, only some of the categories defined hereafter are applicable, on account of local gas
distribution conditions (types of gas and supply pressures). For these categories, requirements different from those
defined in this standard shall not be specified.

ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ

Annex A describes the gas distribution conditions and types of connection applicable to each country.
This specification only covers appliances of the following categories:
a)

appliances in Category I3+which may be used at a nominal operating pressure of 37 mbar when used on
propane and a nominal operating pressure of 28 mbar or 30 mbar when used on butane;

b)

appliances in Category I3B/P(30) which may be used with propane, butane or mixes of these gases at a nominal
operating pressure of 28 mbar or 30 mbar;

c)

appliances in Category I3B/P(50) which may be used with propane, butane or mixes of these gases at a nominal
operating pressure of 50 mbar;

d)

appliances in Category I3B which may be used with butane only at a nominal operating pressures of 28 mbar
or 30 mbar;

e)

appliances in Category I3P(37) which may be used with propane only at a nominal operating pressure of
37 mbar;

f)

appliances in Category I3P(50) which may be used with propane only at a nominal operating pressure of 50
mbar.

4.3 Classification of appliances according to the method of evacuation of products of
combustion
According to the classification given in CR 1749, the appliances falling into the scope of this standard are of type
A1AS, that is to say "appliances not intended for connection to a flue or to a device for evacuating the products of
combustion to the outside of the room in which the appliance is installed, not fitted with a fan, but fitted with an
atmosphere sensing device" (see 5.13.2).

10

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BS EN 449:2002+A1:2007
EN 449:2002+A1:2007 (E)

5
5.1

Safety and constructional requirements
Test methods

The test methods and means of assessment shall be as described in clause 6.

5.2

Conversion to different gases

The appliance shall be supplied for a single gas category and for a single operating pressure or pressure couple.
Conversion to another category or pressure or pressure couple is not permitted.

5.3

Materials

The quality and thickness of material used in the construction of an appliance shall be such that the safety
characteristics are not altered in use.
In particular, all parts of the appliance shall withstand the mechanical, chemical and thermal conditions to which
they may be submitted during their use. In normal conditions of use, of cleaning or of adjustment, the materials
shall not be liable to any deformation which might impair their performance. Metal parts shall be suitably protected
against the effects of corrosion.
When a European Standard is adopted for a means of sealing used on the appliance, that means of sealing shall
comply with the requirements of that European Standard.
Rubber seals shall be made from materials which comply with EN 549.

ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ

The appliance gas pipework and gas controls shall be of metal except as allowed in 5.6.
Materials containing asbestos shall not be used.

Glass components shall not have sharp edges or corners likely to cause injury during use or maintenance.
Mountings for glass components shall be such as to avoid stresses on the glass during normal use.

5.4

Cleaning and user maintenance

Any part of the appliance requiring cleaning by the user shall be easily accessible without having to move the
appliance, and without the use of a tool. It shall be possible to replace such parts correctly and without difficulty.
Appliances shall have no ragged or sharp edges other than those necessary for the function of the appliance or
accessory that could create an hazard for the user in normal use or during user maintenance.
The assembly of the LPG container by the user shall be possible with simple, commonly available, tools. If a
special tool is required it shall be provided with the appliance by the manufacturer.

5.5

Strength of assembly

The construction of the appliance shall be such that, during normal conditions of use, maintenance and, for mobile
and portable appliances, movement, any displacement, distortion or deterioration of parts likely to impair its good
performance will not occur.
For mobile and portable heaters connected using a downward facing union connector (5.7.1 b2), at the end of the
test carried out according to 6.5 a), the soundness of the gas circuit shall be checked according to 5.6.

11

BS EN 449:2002+A1:2007
EN 449:2002+A1:2007 (E)

5.6

Soundness of the gas circuit assembly

All gas carrying parts, starting with the inlet connection, shall be delivered by the manufacturer assembled for
operation.
Holes for screws, pins, etc. intended for the assembly of components shall not open into the gas ways.
The soundness of assemblies connected to the gas circuit shall be assured, by means of mechanical seal joints.
For parts that do not require to be dismantled during normal maintenance, for example taps and injectors, the use
of appropriate thread sealing compounds is permitted, those compounds shall comply with EN 751-1 and
EN 751-2.
Soft solder shall not be used to ensure the soundness of the connections of the gas circuit. Removable
components or the threaded parts of the pipe work which may be dismantled during normal maintenance shall
remain sound after five disconnection’s, if necessary after changing a gasket, where such exists.
Under the test condition specified in 6.6.2, the leak detected during each of the tests numbers 1 and 2 shall not
exceed 0,07 dm3/h (dry air, 20 °C, 1 013,25 mbar).

5.7

Connections

5.7.1

Gas inlet

The gas inlet to the appliance shall be one of the following types:

a)

b)

ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ

for fixed appliances:
1)

without a thread: for a length of at least 30 mm its extremity shall be cylindrical, smooth and clean to allow
connection by means of a gas-tight compression fitting;

2)

with a thread: its extremity shall have a thread following ISO 228-1 or ISO 7-1, size 1/2, 3/8, 1/4 (major
diameter 21 mm, 17 mm or 13 mm);

3)

for connection to copper tube complying with EN 1057 (compression or capilliary fittings);

for mobile and portable appliances:
1)

with a nozzle for the attachment of a flexible tube;

2)

a downward facing union connector for a hose assembly.

The Special National Conditions with regard to connections are given in annex A.
5.7.2

Pressure test point

For fixed appliances, means shall be provided to allow the pressure to be measured easily.
The pressure test point in the gas circuit, if exists, shall have a nozzle with an external diameter of ( 9 0− 0 ,5 ) mm and
shall be at least 10 mm long. The internal diameter shall not exceed 1 mm.
5.7.3

Connection with flexible houses having a threaded extremity

The housing assembly shall be designed such as to resist to the tests described in 6.5 a).

12

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BS EN 449:2002+A1:2007
EN 449:2002+A1:2007 (E)

5.8
5.8.1

Appliance stability, fixing and mobility devices
Appliances with integral containers

The appliance shall be so designed that, with its container in place, it cannot be tipped over when subjected to the
force and the test conditions specified in 6.8.1.

5.8.2

Appliances without integral containers

When tested in accordance with 6.8.2 the appliance shall not fall forwards or sideways when placed on an inclined
plane at an angle of 15°. It shall not fall backwards when placed on an inclined plane at an angle of 10°.
5.8.3

Fixed appliances

When the appliance is installed as described in the manufacturer's instructions, it shall be secure.
In the test conditions described in 6.8.3, the appliance shall remain securely fixed to the wall and the mounting
shall not be distorted.
5.8.4

Mobility devices

After the test described in 6.8.4, there shall be no damage to the wheels or castors, and they shall rotate freely.

5.9
5.9.1

Taps and controls
General

ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ

The appliance shall be fitted with such taps and controls as are essential for the normal operation of the appliance
by the user.
When a European Standard is adopted for any item of auxiliary equipment as defined in 3.2, that equipment shall

comply with the requirements of that European Standard.
When a flame supervision device, multi-functional control, automatic shut-off valve, or thermostat falls within the
scope of EN 125, EN 126, EN 161 or EN 257, the requirements of that standard shall be met.
Mobile and portable appliances shall not incorporate a position on the tap capable of completely closing the gas
supply.
Catalytic appliances which employ a flame for ignition shall be so constructed that after the pre-heat period it is not
possible to select a pre-heat position without continuous manual operation.
Taps shall be placed in such a way that their strength, operation, manipulation and accessibility undergo no
damage from actions to which they are subjected in normal use, and they shall be protected against ingress of
foreign matter.
Moreover, their manipulation shall remain easy during and after the test described in 6.23.2.
All parts of a control shall be clean.
Taps shall be mounted in such a way that no accidental movement relative to the gas supply connection is
possible.
Any control placed in the gas circuit shall be arranged so that any maintenance by a service engineer is easy and
so that its exchange by a service engineer is possible.

13


BS EN 449:2002+A1:2007
EN 449:2002+A1:2007 (E)

5.9.2

Plug type taps

A plug type tap shall have a compensating device to take up automatically any wear between the plug and the tap
body.
5.9.3

Needle type taps

A needle type tap shall not be capable of reducing the heat input to a burner below a pre-set minimum.
It shall not be possible to unscrew the needle from its housing when opening the valve. When closing, the pressure
of the needle on its seat constitutes the stop.
The operating screw shall be a simple thread such that the maximum rate is obtained after turning not less than a
half turn and not more than one turn from the valve's closed position.

5.10 Control handles, knobs or pushbuttons
The closed position (fixed appliances), open and any reduced rate positions (for fixed and mobile appliances) shall
be marked in a visible legible and durable fashion (e.g. a large flame to denote full on, a small flame to indicate a
low rate and a full disc or circle, of at least 3 mm diameter, to denote any off position of fixed appliances).
A tap capable of complete closing shall not be used on mobile appliances.
If control handles operate by turning, the closing direction shall be clockwise.
For fixed appliances, if the control handles operate by turning, and their axes are in a horizontal plane, the closure
mark placed in a vertical plane shall be situated above the turning axis of the handle in its closed position. The
closed position of the tap shall not give rise to any possibility of confusion with an open position.

ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ

Any special position of the tap intended for ignition and/or any special button that has to be operated to cause
ignition shall be clearly marked (e.g. by a star).
Where more than one tap is provided it shall be obvious which burner is controlled by each tap.
Tap handles shall be so designed or arranged relative to one another that the movement of one handle does not
cause inadvertent movement of an adjacent one.
Tap handles shall be so designed that they can neither be fitted in the wrong position nor move by themselves. The
shape of a handle shall be such that its grip makes manipulation easy.

5.11 Injectors

Injectors shall be removable.
Injectors shall carry an indelible means of identification of their orifice, in preference, in hundredth of millimetre.
Adjustable injectors shall not be used.

5.12 Ignition device
Where an ignition device exists, it shall provide rapid and safe ignition.
All the components of the ignition device shall be designed to avoid damage or accidental displacement in use. The
relative positions of the ignition device and the burner shall be sufficiently well defined to ensure satisfactory
operation of the assembly.
Diffusive catalytic combustion heaters shall not be capable of operating in a pilot only condition.
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BS EN 449:2002+A1:2007
EN 449:2002+A1:2007 (E)

In the event of failure of any incorporated ignition device it shall be possible to light the appliance with an external
source of ignition.

5.13 Safety devices
5.13.1 Flame supervision devices
A flame supervision device shall be fitted. It shall be so designed that, in the case of a failure of any of the
components indispensable to its performance, the supply of the gas to the burners is cut-off automatically. It shall
be so mounted as to ensure satisfactory performance.
The appliance shall not incorporate any device, which does not require continuous manual operation, that allows
the flame supervision device to be over-ridden.
Under the conditions of test described in 6.13.1 ignition delay times shall not exceed 20 s. This delay time does not
include any time necessary for the pre-heating of any catalytic panel. The extinction delay time shall not exceed

60 s.
5.13.2 Atmosphere sensing devices
Appliances shall be fitted with an atmosphere sensing device.
When the appliance is tested in accordance with the method given in 6.13.2 the atmosphere sensing device shall
cause shut off of the gas supply when the CO2 concentration of the atmosphere is between 0,8 % and 1,5 %(V/V).
Where the pilot of an atmosphere sensing device is required to perform functions other than vitiation detection its
performance shall also comply with the requirements of the relevant clauses of this standard relating to these
functions.

ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ

The atmosphere sensing device shall not be susceptible to unauthorized adjustment or interference.
It shall carry a permanent mark of identification: the name of the manufacturer (or its acronym or logo) and the
reference of the product.

5.14 LPG container installation compartment
Appliances incorporating a liquefied petroleum gas container shall have a LPG container installation compartment.
The dimensions of the opening and of the inside of the LPG container installation compartment shall be sufficient to
allow the LPG container used in the country of destination of the appliance to be installed, taken out and operated,
with the pressure regulator mounted, easily.
The LPG container installation compartment shall be so designed as not to accommodate containers with nominal
gas capacity greater than 15 kg.
The connection to the LPG container shall be made by tubing or flexible houses with a length as small as possible
and in any case not exceeding 1 m.
In addition the LPG container installation compartment shall be so designed that:


effective ventilation is provided by openings in its base and upper section, the total area of the openings in
the upper section being at least 1/100 and in the base 1/50 of the floor area of the LPG container installation
compartment;



the gas container support has sufficient mechanical strength to resist deformation under the load of a full LPG
container; an arrangement with the gas container resting directly on the ground is unacceptable;



it has no sill higher than the base on which the gas container rests;
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BS EN 449:2002+A1:2007
EN 449:2002+A1:2007 (E)



the gas container can be easily inserted in, or removed from, the appliance;



the gas container isolating valve is readily accessible and remains easy to manipulate when the LPG container
is in place;



where the appliance may be connected by a flexible tube, this shall not be in contact with sharp edges;



minimal internal communication exists between the LPG container installation compartment and the only parts
of the appliance where burners are placed;



the ventilation openings of the LPG container installation compartment cannot be obstructed when the
appliance is placed in position.

5.15 Verification of the heat inputs
5.15.1 Verification of the nominal heat inputs
Under the conditions of test specified in 6.15 each of the burners, supplied separately, shall be capable of giving
the nominal heat input stated by the manufacturer. However:


for appliances other than diffusive catalytic combustion heaters a tolerance of ± 5 % relative to the nominal
rate is permitted for the value obtained in the test;



for diffusive catalytic combustion heaters a tolerance of ± 10 % relative to the nominal rate is permitted for the
value obtained in the test.

ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ

For appliances other than diffusive catalytic heaters maximum heat input during ignition shall not exceed 2,5 kW
(Hs).
For diffusive catalytic heaters the maximum heat input during the first minute of operation shall not exceed 200 %
of the nominal heat input.
5.15.2 Verification of reduced heat input
Where the appliance has a reduced heat input this shall not be more than 2/3 of the nominal heat input when

tested in accordance with 6.15.3.

5.16 Effect of light back
The burners shall show no deterioration likely to jeopardize performance, after the test in 6.16.

5.17 Temperatures
When tested in accordance with 6.17 the surface temperature of the various parts of the appliance indicated below
shall not exceed the specified limits.
5.17.1 Temperature of various parts of the appliance
The temperature of those parts that are intended to be touched and surfaces within 10 mm of such parts, shall not
exceed the ambient temperature by more than:


35 K for metals or equivalent materials;



45 K for porcelain or equivalent materials;



60 K for plastics or equivalent materials.

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BS EN 449:2002+A1:2007
EN 449:2002+A1:2007 (E)

The temperature of the front and sides of the appliance shall not exceed the ambient temperature by more than
80 K. Fireguards and convected air outlet grills and surfaces within 50 mm of these are excluded from this
requirement. If the end of the gas inlet can be fitted with a push-on connector conforming to the national situations
given in annex A, this connector shall be positioned so that its temperature does not exceed the ambient
temperature by more than 30 K.
NOTE
Temperature rise limit for metal applies to parts having a metal coasting at least 0,1 mm thick, and to metal parts
having a plastic coating less than 0,3 mm thick.

5.17.2 Temperature of the support, walls or adjacent surfaces
The temperature of the support on which the appliance is placed and, for fixed appliances, the temperature of the
walls situated near the appliance and, when applicable, the ceilings, shelves or cupboards above the appliance
shall not, under the test conditions defined in 6.17, exceed the ambient temperature by more than 50 K.
5.17.3 Temperature of taps and components
Under the conditions defined in 6.17, the temperature of tap bodies and components, including glass components,
shall not exceed the value recommended by the manufacturer for an ambient temperature of 20 °C.

5.18 Overheating of the LPG container and its LPG container installation compartment
5.18.1 Overheating of the walls of the LPG container installation compartment
!Under the conditions defined in 6.18, the temperature rise above ambient temperature of the LPG container
installation compartment walls shall not exceed 30 K at any point that is likely to come in contact with the flexible
tube and/or the gas cylinder."

ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ

5.18.2 Overheating of the LPG container

Under the test conditions defined in 6.18, the rise in vapour pressure inside the container relative to that measured
at the start of the test shall not exceed the values given in Table 2:

Table 2 — Maximum allowable pressure increase inside the LPG container
Ambient temperature

Maximum permitted pressure rise

(°C)

(bar)

15

0,40

20

0,45

25

0,50

NOTE
This increase corresponds to a temperature rise of 5 K starting from the appropriate
ambient temperature.

5.19 Ignition
5.19.1 General
Ignition of the pilot shall be from an easily accessible position and may be obtained either with a match or by
means of an ignition device incorporated in the appliance.
In the event of failure of the ignition device it shall be possible to light the appliance by an external source of

ignition.
It shall be possible to determine readily that the pilot is alight.
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BS EN 449:2002+A1:2007
EN 449:2002+A1:2007 (E)

Any condensate on start up shall not affect the safe operation of the appliance.
Under the test conditions defined in 6.19 and in a still atmosphere, ignition of pilots and burners shall be ensured
correctly, i.e. ignition is smooth, flames carry across to all ports or jets, flames do not light back, flames do not
leave the confines of the appliance and do not cause excessive noise. Catalytic panels shall commence operation
without flames leaving the confines of the appliance.
5.19.2 Ignition performance
5.19.2.1

Cold condition

When the appliance is operated in accordance with the manufacturer's instructions, and tested in accordance with
6.19.2.1 ignition shall be satisfactory.
5.19.2.2

Hot condition

Ignition shall be satisfactory when tested in accordance with the method in 6.19.2.2. Ignition shall also take place at
any thermostat setting down to that which will give the bypass rate.
5.19.2.3

At low temperatures

When the appliance is operated in accordance with the manufacturer's instructions, and tested in accordance with
6.19.2.3 ignition shall be satisfactory.

5.20 Crosslighting
5.20.1 General

ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ

Under the test conditions defined in 6.20 and in a still atmosphere, crosslighting between burners shall be ensured
correctly and without excessive noise.
5.20.2 Cold condition
The crosslighting of an appliance having burners subdivided into sections and between pilots and main burners
shall be smooth and flames shall carry across to all ports and not light back to the injector when the appliance is
tested in accordance with the method given in 6.20.2.
5.20.3 Hot condition
The crosslighting of appliances having burners subdivided into sections and between pilots and main burners shall
be smooth and flames shall carry across to all ports and not light back to the injector when the appliance is tested
in accordance with the method given in 6.20.3.
5.20.4 At low temperature
The crosslighting of appliances having burners subdivided into sections and between pilots and main burners shall
be smooth and flames shall carry across to all ports and not light back to the injector when the appliance is tested
in accordance with the method given in 6.20.4.
5.20.5 Delayed ignition on closed fronted fires
When ignition is delayed by up to a maximum of 3 min and when tested in accordance with 6.20.5, using any rate
available there shall be no hazard to the user or damage to the appliance which affects safety.

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