Bsi bs en 00449 2002 + a1 2007

www bzfxw com BRITISH STANDARD BS EN 449 2002 +A1 2007 Specification for dedicated liquefied petroleum gas appliances — Domestic flueless space heaters (including diffusive catalytic combustion heater[.]

This British Standard was

published under the authority

of the Standards Policy and

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.

Amendments/corrigenda issued since publication

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

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

C O M I T É E U R O P É E N D E N O R M A L I S A T I O N

E U R O P Ä I S C H E S K O M I T E E FÜ R N O R M U N G

Management Centre: rue de Stassart, 36 B-1050 Brussels

© 2007 CEN All rights of exploitation in any form and by any means reserved

worldwide for CEN national Members

Ref No 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

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

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

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

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

3.2

auxiliary equipment

 tap and cocks;

 flame supervision devices;

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

nominal heat input

value of the heat input declared by the manufacturer

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.)

7

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

3.14

sound mechanical joint

connection device assuring soundness in an assembly made up of several parts, generally of metal

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'

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

closed fronted fire

appliance in which the glowing area is substantially covered by means of a transparent or translucent screen

9

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

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

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

Table 1 — Classification of gases

Gas families and groups 3rd Family Gases

Wobbe Number MJ/m 3 (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

4.2 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

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

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)

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5 Safety and constructional requirements

5.1 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

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

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

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) 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);

b) 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 ( 0

5 0

9− , ) 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)

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5.8 Appliance stability, fixing and mobility devices

5.8.1 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 Taps and controls

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

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

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

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

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;

 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

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

17

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."

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

(°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

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

5.20.3 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

5.22.1 Appliances other than diffusive catalytic combustion heaters

When tested in accordance with the method given in 6.22.2 for each of the burners or parts of burners working

separately or simultaneously the concentration of CO in the room shall not exceed 0,008 % (V/V) when the air in the room is vitiated to a level of 2,1 % (V/V) CO2 when measured at the room centre

5.22.2 Diffusive catalytic combustion heaters

5.22.2.1 Slip of gas during start-up

When tested in accordance with the method given in 6.22.3.1, the slip of unburnt gas shall not exceed 0,08

5.22.2.2 Combustion in a vitiated environment

When tested in accordance with the method given in 6.22.3.2 the concentration of CO in the room shall not exceed

0,008 % (V/V) when the air in the room is vitiated to a level of 2,1 % (V/V) CO2 measured at the room centre

At this degree of vitiation the slip of unburned fuel shall not exceed 0,04

5.23 Additional requirements

5.23.1 General

The appliance, in its gas line, shall not require assembly by the user other than connection to the gas supply (e.g fitting of tubing and regulator, see however annex A) Primary air and gas rate adjusters shall be preset by the manufacturer and shall not be capable of being changed The appliance shall not incorporate a governor (other than the gas container regulator)

5.23.2 Prolonged performance test

5.23.2.1 General

After testing in accordance with the method given in 6.23.2 the appliance shall comply with the following requirements :

a) no part of the appliance shall have suffered any breakdown or distortion liable to lead to a reduction in the life

of the components or to affect the safety of the appliance;

b) there shall be no deterioration of appliance cases;

c) there shall be no seizure of screws or other changes likely to cause undue difficulty in subsequent maintenance;

d) any tap shall be easy to turn both with the appliance hot and when it has cooled down;

e) after cooling down, the appliance shall comply with the soundness requirements given in 5.6;

f) the requirements for the atmosphere sensing device given in 5.13.2 shall be met;

g) the requirements for the flame supervision device given in 5.13.1 shall be met

5.23.2.2 Appliances other than diffusive catalytic heaters

In addition to the requirements of 5.23.2:

a) the heat input shall not have changed by more than 5 % from its initial value;

b) the combustion requirements specified in 5.22.1 shall be met

5.23.2.3 Diffusive catalytic combustion heaters

In addition to the requirements of 5.23.2:

a) the heat input shall not have changed by more than 10 % from its initial value (see 5.15.1);

b) the requirements for slip of unburnt fuel and for the carbon monoxide concentration given in 5.22.2 shall be met

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5.23.3.2.3 Glass fronted appliances

When the design of the guard includes glass or similar material this material shall not be damaged by the impact test described in 6.23.3.1.3

5.23.3.3 Dimensions

For portable or mobile heaters:

 no opening in the guard, or between the guard and the aperture to be protected, shall have a major dimension exceeding 140 mm and a minor dimension exceeding 20 mm and a diagonal measurement exceeding

141 mm

For fixed heaters:

 no opening in the guard, or between the guard and the aperture to be protected, shall have a major dimension exceeding 150 mm and a minor dimension exceeding 35 mm and a diagonal measurement exceeding

154 mm

Where a part of the fireguard comes within 3 mm of the aperture to be protected it shall be considered that the part reaches the edge of the aperture to be protected

These dimensions are subject to the following exceptions:

a) where it is not possible to pass a 12 mm diameter probe having a hemispherical end, applied with a force not exceeding 5 N, through any opening between the guard and the aperture to be protected The weight of the probe shall be taken into account in the force applied;

b) where the gap between any vertical rods of the guard does not exceed 5 mm

6 Test methods

NOTE This clause describes the methods of test which enable the requirements of clause 5 to be verified

6.1 General

6.1.1 Reference and test gases

6.1.1.1 Definition of test gases

The burners are tested with the gases indicated in Table 3 according to the category of the appliance (4.2)

Table 3 — Test gases corresponding to the categories of appliances

Reference gas G 30 G 31

Incomplete combustion gas G 30 G 31 Light back gas G 32 G 32 Flame lift gas G 31 G 31 Sooting gas G 30 G 31 and G 32

The characteristics of the test gases are given in Table 4

Table 4 — Characteristics of the test gases (standard conditions for volumetric factors are 1 013,25 mbar, 15 oC Dry)

Reference gas and

and sooting gas G 31 C3H8 = 100 76,84 95,65 50,37 1,550

Flame lift limit gas

G 31 C3H8 = 100 76,84 95,65 50,37 1,550

I3P(37)

I3P(50)

Light back limit gas and

sooting limit gas G 32 C3H6 = 100 72,86 88,52 48,94 1,476 NOTE The test gases in this table are consistent with those given in EN 437

a Unless otherwise specified any mixture of ISO/n butane can be used

The composition of the gases used for the tests shall be as near as possible to those given in Table 4 The constitution of these gases shall be in accordance with the following rules:

a) the Wobbe number of the gas used shall be within ±2 % of the value indicated in the table for the corresponding test gas;

b) the gases used shall have the following minimum degrees of purity:

23

Table 5 — Test Pressures

Category Normal

pressure mbar

Minimum pressure mbar

Maximum pressure

according to data plate

The dimensions of these panels shall be such that they extend at least 50 mm beyond the corresponding dimensions of the appliance

6.1.4 Test procedure

The appliance shall be fitted with the appropriate injectors for the gas and pressure used Precautions shall be taken to prevent thermostats and variable controls from acting to interfere with the gas flow For example for thermostats it may be necessary to immerse the sensor in iced water for tests at full heat input and hot water for tests at by-pass or reduced heat input

6.2 Conversion to different gases

Not allowed (see 5.2)

6.3 Materials

Visual and mechanical examination

6.4 Cleaning and user maintenance

Visual and mechanical examination

6.5 Strength of assembly

a) Mechanical test for connection with nozzle and downward facing union connector (see 5.7.1 b);

the thread connection is successively submitted to the three following strengths (the appliance may be maintained

to avoid its typing or moving during the tests);

1) vertical traction strength from up to down of 200 N (during 60 s);

2) tightening torque of 10 N.m (upstream part of the bend);

3) tightening torque of 10 N.m (downstream part of the bend);

b) other types of connection

Visual and mechanical examination

6.6 Soundness of the gas circuit assembly

6.6.1 Construction

Visual and mechanical examination

6.6.2 Soundness test

The gas-carrying parts shall be tested successively as follows:

 test No 1: using air at a pressure of 150 mbar with all taps and shut-off devices closed;

 test No 2: using air at a pressure of 150 mbar with all taps in the 'on' position, the injectors of burners and pilots temporarily blocked and any shut-off devices (for example the valves of safety devices), where present,

in the open position

NOTE On certain components (e.g pilots and catalytic unit) it can not be possible to block their gas outlets in situ In this case they should be disconnected for this test but subsequently they should be examined using an appropriate method (e.g soapy water, hydrocarbon analyser) The tests should be carried out with the appliance cold, using air

The method used for this test shall be such as the measurement error is less than 0,005 dm3/h In case of dispute the equipment shown in Figure 1 shall be used

6.8 Appliance stability, fixing and mobility devices

6.8.1 Appliances with integral containers

Ensure that any wheels or castors of the appliance are fixed so that it cannot roll or slide and place an empty container in the appliance Place the appliance on a horizontal plain surface and, for appliances with containers of

up to 4,5 kg, apply a force of 25 N to the upper part of the appliance and in the most unfavourable direction For appliances with larger containers, increase the force by 1 N for every extra kilogram in excess of 4,5 kg up to 15 kg

of gas

6.8.2 Appliances without integral containers

Place the appliance on an inclined plane at the angle specified in 5.8.2

6.8.3 Fixed appliances

Fit the appliance to a wall in accordance with the manufacturer’s instructions Apply a vertical force uniformly on the appliance equivalent to 1,5 times the weight of the appliance, for 1 minute (The test load shall be rounded to the kilo above)

EXAMPLE Appliance = 10 kg - Test load to be added on the appliance = 1,5 × 10 = 15 kg

6.8.4 Mobility devices

Place the appliance on a horizontal plain surface, and apply a vertical force for 1 minute on the wheels or castors equivalent to 0,5 times the weight of the appliance without LPG container plus 3,5 times the maximum nominal capacity of the LPG container (The test load shall be rounded to the kilo above)

EXAMPLE Appliance = 10 kg – Maximal nominal capacity of the LPG container = 15 kg - Test load to be added on the appliance = 0,5 × 10 + 3,5 × 15 = 57,5 kg rounded to 58 kg

6.9 Taps and controls

Visual and Mechanical examination

6.10 Control handles, knobs or pushbuttons

Visual and Mechanical examination

6.13.1 Flame supervision device delay times

The tests designed to verify the ignition and extinction delay times of the flame supervision devices specified in 5.13 are carried out with the reference gas corresponding to the appliance category, at the normal test pressure The ignition delay time is that between the moment when the gas is lit at the pilot (or main burner, if there is no pilot) and that when the flame supervision device acts