SIST EN 14989-2:2008

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Chimneys - Requirements and test methods for metal chimneys and material independent air supply ducts for roomsealed heating applications - Part 2: Flue and air supply ducts for room sealed appliancesDimniki - Zahteve in preskusne metode za kovinske dimnike in od materialov neodvisne kanale za dovod zraka za ogrevalne naprave v zaprtih prostorih - 2. del: Kanali za odvod dima in dovod zraka v zaprtih prostorihConduits de fumée et systemes d'alimentation en air pour appareils étanches -
Exigences et méthodes d'essai - Partie 2 : Conduits de fumée et d'alimentation en air pour appareils étanches individuelsAbgasanlagen — Anforderungen und Prüfverfahren für Metall-Abgasanlagen und materialunabhängige Luftleitungen für raumluftunabhängige Anlagen — Teil 2: Abgas- und Luftleitungen für raumluftunabhängige FeuerstättenTa slovenski standard je istoveten z:EN 14989-2:2007SIST EN 14989-2:2008en,fr,de91.060.40ICS:SLOVENSKI
STANDARDSIST EN 14989-2:200801-marec-2008

EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 14989-2December 2007ICS 91.060.40; 91.140.30 English VersionChimneys - Requirements and test methods for metal chimneysand material independent air supply ducts for roomsealedheating applications - Part 2: Flue and air supply ducts for roomsealed appliancesConduits de fumée - Exigences et méthodes d'essai pourconduits de fumée métalliques et conduits d'alimentationen air pour tous matériaux pour des appareils de chauffageétanches - Partie 2: Conduits de fumée et d'alimentation enair pour appareils étanchesAbgasanlagen - Anforderungen und Prüfverfahren fürMetall-Abgasanlagen und materialunabhängigeLuftleitungen für raumluftunabhängige Anlagen - Teil 2:Abgas- und Luftleitungen für raumluftunabhängigeFeuerstättenThis European Standard was approved by CEN on 10 November 2007.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards 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 translationunder the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as theofficial 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 STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2007 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 14989-2:2007: E

Preferred dimensions.60 A.1 General.60 A.2 Dimensions of the push-in spigots for a separate air/flue configuration.60 A.3 Dimensions of the push-in spigots for a concentric air/flue configuration.62 Annex B (normative)
Coefficients of flow resistance.64 Annex C (normative)
Choice of size for type test and sampling.67 Annex D (normative)
Sampling for factory production control.68 D.1 Incoming material.68 D.1.1 Sampling plans.68 D.1.2 Acceptable quality level (AQL).68 D.1.3 Normal, tightened or reduced inspection.68 D.1.4 Single, double, multiple or sequential sampling.68 D.1.5 Batch quantity.68 D.1.6 The inspection level.68 D.2 In-process inspection.69 D.2.1 All dimensional aspects.69 D.2.2 Joint leakage tests.69 D.2.3 Insulation weight checks.69 D.2.4 Volume and density checks.69 D.2.5 Finished goods checks.69 Annex E (normative)
Factory production control.70 E.1 Insulation material.70 E.2 Metals, including coatings.70 E.3 Supports.70 E.4 Seals and sealants.70

Clauses of this European Standard addressing the provisions of the EU Construction Products Directive.72 ZA.1 Scope and relevant characteristics.72 ZA.2 Procedure for attestation of conformity of metal liners, connecting flue pipes and fittings flue and material independent air supply ducts for room sealed appliances.74 ZA.2.1 System of attestation of conformity.74 ZA.2.2 EC Declaration of conformity.75 ZA.3 CE marking and labelling.76 Bibliography.79

EN 1856-2:2004, EN 1859:2000 and the following apply. 3.1 air supply duct independent duct in a building or an integral part of an air/flue configuration conveying combustion air to a room sealed appliance 3.2 concentric air/flue configuration configuration in which the chimney flue is fully surrounded by the air supply duct

velocity may differ from the nominal velocity, because the actual inside diameter differs from the nominal diameter) 3.8 push-in spigot part of a pipe or fitting which is pushed into the socket of another pipe or fitting, thus resulting in a connection 3.9 room sealed appliance appliance in which the combustion circuit (air supply, combustion chamber, heat exchanger and evacuation of the products of combustion) is sealed with respect to the room in which the appliance is installed 3.10 separate air/flue configuration configuration in which the air supply duct and the chimney flue are separate (non-concentric) 3.11 socket part of a pipe or fitting which is pushed over the push-in spigot of another pipe or fitting, thus resulting in a connection 3.12 terminal adapter part of the terminal used to connect the terminal to the air supply duct and the flue. It may include the transition from parallel to concentric configuration 4 Symbols and abbreviations αa coefficient of heat transfer between the supply air and the outer surface of the flue duct in
KmW2⋅ αaB coefficient of heat transfer between the outside of the air supply duct and the ambient air in KmW2⋅ αi coefficient of heat transfer between the flue gas and the inner surface of the flue duct in
KmW2⋅
WKm2⋅ BΛ1 thermal resistance of the air supply duct in WKm2⋅ ρ density of air at 20 °C = 1,2 in 3mkg ρe density of air for Te in 3mkg ρm density of air for Tm in 3mkg ρmB density of air for TmB in 3mkg ψ coefficient of friction of the flue -
ψB the higher of the value of the coefficient of friction of the inside of the air supply duct and the outside of the flue duct -
ψsmooth coefficient of friction of the flue for hydraulically smooth flow -
ψsmoothB coefficient of friction of the air supply for hydraulically smooth flow -
ζ flow resistance factor, friction factor -
ζA declared flow resistance factor of the air supply duct -
ζF declared flow resistance factor of the flue duct -
AB cross-sectional area of the air supply passage in m² cp specific heat capacity of air for Tm in KkJ⋅g cpB specific heat capacity of air for TmB in KkJ⋅g d1 external diameter of the push-in spigot of the flue duct in
mm d2 internal diameter of the socket of the flue duct in
mm D1 external diameter of the push-in spigot of the air supply in
mm D2 internal diameter of the duct socket of the air supply duct in
mm Dh hydraulic diameter of the flue in
m Dha hydraulic diameter of the outside of the flue duct in
m
KmW2⋅ kBb coefficient of heat transmission between the supply air and the ambient air at temperature equilibrium in KmW2⋅ L length of the test segment in m L0 available insertion length in
mm Nu Nusselt number for the flue -
Nua Nusselt number for the outside of the flue duct -
NuB Nusselt number for a reference pipe flow -
NuiB Nusselt number for the inside of the air supply duct -
∆p static pressure difference, measured friction in
Pa Pr Prandtl number of the flue duct -
PrB Prandtl number of the supply air duct -
r mean value of roughness of the inner wall of the flue duct in m rB the higher of the value of the mean value of roughness of the inside of the air supply duct and the outside of the flue duct in m Re Reynolds number of the flue -
ReB Reynolds number of the air supply passage -
Srad correction factor for radiation from the outer surface of the flue duct to the inner surface of the air supply duct -
Ta ambient test temperature in oC Te air temperature at the flue inlet in °C TeB air temperature at the air supply inlet in °C Tm mean temperature in the flue in °C TmB mean temperature in the air supply in °C To air temperature at the flue outlet in °C ToB air temperature at air supply outlet in °C Tu ambient air temperature
in °C U circumference of the inside of the flue in m Ua circumference of the outside of the flue duct in m UiB circumference of the inside of the air supply duct in m V• test flow rate
in sm3 wn velocity of the flow inside the flue under nominal operating conditions
in sm wmB average velocity of the supply air in sm

mm
5 Manufacturer's declaration for type testing The manufacturer shall provide the relevant information in Clause 8 and, in addition, shall declare, for the flue and air supply duct: a) the manufacturing drawings including declared internal diameter and tolerances of manufacture; b) materials of manufacture, and the minimum thicknesses; c) the nominal diameter (size); d) the minimum wall thickness after manufacture, the maximum installed length, maximum external diameters, total mass and design loads of the fittings or sections. 6 Dimensions and tolerances 6.1 The thickness of material of the flue and air supply duct shall be not less than that declared by the manufacturer. 6.2 The declared internal diameter of the flue duct shall not vary by more than ± 5 mm from the nominal size. The measured internal diameter of the flue and air supply duct shall be not less than the manufacturer's declared diameter. 7 Performance requirements 7.1 General Unless otherwise stated, performance requirements for fittings shall be the same as those for ducts. Flue ducts for separate air/flue configurations shall meet the requirements of EN 1856-1. 7.2 Mechanical resistance and stability 7.2.1 Compressive strength 7.2.1.1 Flue and air supply ducts The manufacturer shall declare the relevant design loads. For concentric air/flue configurations where the air supply duct is load bearing when tested according to 12.1.1.1, the configuration shall withstand a load of at least three times the manufacturer's declared design load. For concentric air/flue configurations where the flue duct is load bearing when tested according to 12.1.1.1, the configuration shall withstand a load of at least four times the manufacturer's declared design load.

1,5 kN/m2 of projected outer surface area. 7.3 Resistance to fire 7.3.1 Internal to external The manufacturer shall declare the minimum distance to combustible material according to 7.5.1.2. 7.3.2 External to external Until a European test method is available the resistance to fire, external to external, shall be evaluated and declared according to national regulations. 7.4 Hygiene, health and environment 7.4.1 Gastightness of the flue duct When a flue duct is tested according to the test methods described in 12.2.1.2.2, the leakage rate shall not be greater than that given in Table 5, both before and after the thermal performance tests and where appropriate after the sootfire test.

The maximum temperature of the adjacent combustible material shall not be greater than 100 °C related to an ambient temperature of 20 °C. 7.5.1.3 Temperature of additional materials and components Any additional materials or components in the flue and/or air supply duct shall be tested in accordance with 12.3.1.3.3. The maximum temperature of these materials or components shall not exceed their specified working temperature. 7.5.1.4 Temperature cycling test The flue/air supply duct and its components shall be tested in accordance with 12.3.1.3.4. No part of air/flue configuration or its components shall show any permanent deformation, blisters or cracks that may affect its performance. The elongation of the test air/flue configuration shall not exceed 0,005 m, and meet the gas tightness given in 7.4.1 and 7.4.2. 7.5.1.5 Accidental human contact Where accidental human contact of a flue is possible, the outer wall surface temperature of the concentric air/flue configuration, when measured during the test of 12.3.1.3.1, shall not be greater than the appropriate value given in Table 1.

Table 1 — Maximum outer wall surface temperatures
Material of the outer surface
Maximum allowed temperature Metal – bare 70 °C Metal – painted 50 µm 80 °C Double Sided Vitreous/Porcelain Enamelled Steel(DSVPES) 160 µm 86 °C Metal – plastic covered 400 µm 98 °C Plastic 93 °C Ceramic, glass 85 °C Concrete, marble 80 °C NOTE The values in Table 1 are based on the criteria in EN ISO 13732-1, relating to a 1 s burn threshold.
7.5.2 Thermal resistance 7.5.2.1 Flue/air supply ducts with concentric air/flue configuration Except where the thermal resistance of the flue duct declared by the manufacturer is zero, the thermal resistance value in [m2K/W] of the flue duct declared by the manufacturer shall be verified by testing according to 12.3.2.2.1 and calculation according to 12.3.2.2.2. Except where the thermal resistance of the air supply duct declared by the manufacturer is zero, the thermal resistance value in [m2K/W] of the air supply duct declared by the manufacturer shall be verified by testing according to 12.3.2.2.1 and calculation according to 12.3.2.2.3. 7.5.3 Rainwater ingress 7.5.3.1 Air supply duct for all systems When the air supply duct is tested according to the test methods described in 12.3.3.1 or 12.3.3.2, there shall be no water entering the air supply duct. Products which fail this requirement may be designated rain water resistant if an adequate drain is provided.
If a manufacturer provides a drain it shall be included in the test assembly prior to test.
The drain shall prevent rainwater entering the appliance 7.5.4 Flow resistance of the flue and air supply ducts and fittings 7.5.4.1 Mean value of roughness of straight ducts The manufacturer shall declare the mean value of roughness for straight concentric and separate flue ducts and straight separate air supply ducts. Typical values are given in Table 2. For concentric air supply ducts the flow resistance shall be measured according to 12.3.4.

Table 2 — Typical values for mean roughness r for flues and air supply ducts Materials of the flues and air supply ducts Typical values for mean roughness, r m Double Sided Vitreous/Porcelain Enamelled Steel(DSVPES) 0,00004
welded steel 0,001 glass 0,001 plastic 0,001 aluminium 0,001 clay ceramic flue liners 0,0015 bricks 0,005 soldered metal 0,002 concrete 0,003 masonry 0,005 corrugated metal 0,005
Where the materials of the air supply ducts are different, the higher roughness value of the surfaces shall be used. 7.5.4.2 Flow resistance of fittings The manufacturer shall declare the flow resistance of fittings. The declared value shall be determined according to the test method described in 12.3.4 under the conditions specified in 12.3.4.1 or, for flue duct fittings and non-concentric air supply duct fittings, obtained from data given in Table B.1. 7.5.5 Water vapour diffusion resistance When a section or fitting designated for wet operating conditions and gas tightness class N1 is tested according to the test method 12.3.5, the outer surface of the section or fitting shall remain dry and the increase in mass of the section or fitting shall not exceed 1,0 % of the insulating material. 7.5.6 Condensate penetration resistance When a straight flue duct or fitting designated for wet operating conditions is tested according to the test method 12.3.5, the outer surface of the flue duct or fitting shall remain dry and the increase in mass of the section or fitting shall not exceed 1,0 % of any insulating material. 7.6 Materials 7.6.1 Flue ducts and other parts in contact with combustion products Flue ducts and other parts in contact with combustion products shall be in accordance with Table 4.

10 Designation 10.1 General The concentric air/flue configuration or the flue duct of the separate air/flue configuration shall be designated in accordance with the following designation system: EXAMPLE Flue/air supply duct EN xx T120 - P1 - D - Vm - L40045 - O50
Temperature class (see 10.2)
Pressure class (N, P or H) (see 10.3)
Resistance to condensate class (W: wet /D: dry)
(see 10.4)
Corrosion resistance (see 10.5.1)
Flue duct material specification (see 10.5.2)
Soot-fire resistance class (G yes or O no) and distance to combustible material in mm (see 10.6)
10.2 Temperature classes and test temperature Table 3 identifies
...