1、BSI Standards PublicationPD CEN/TR 1749:2014European scheme for theclassification of gas appliancesaccording to the method ofevacuation of the combustionproducts (types)PD CEN/TR 1749:2014 PUBLISHED DOCUMENTNational forewordThis Published Document is the UK implementation of CEN/TR1749:2014. It supe
2、rsedes PD CEN/TR 1749:2009 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee GSE/-/4, To brief SFG_U and consider horizontal issuesaffecting gas utilization.A list of organizations represented on this committee can beobtained on request to its secretary.T
3、his publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. The British Standards Institution 2015. Published by BSI StandardsLimited 2015ISBN 978 0 580 85656 3ICS 91.140.40Compliance with a British Standard cannot confer i
4、mmunity fromlegal obligations.This Published Document was published under the authority of theStandards Policy and Strategy Committee on 28 February 2015.Amendments issued since publicationDate Text affectedPD CEN/TR 1749:2014TECHNICAL REPORT RAPPORT TECHNIQUE TECHNISCHER BERICHT CEN/TR 1749 June 20
5、14 ICS 91.140.40 Supersedes CEN/TR 1749:2009English Version European scheme for the classification of gas appliances according to the method of evacuation of the combustion products (types) This Technical Report was approved by CEN on 3 July 2014. It has been drawn up by the Technical Committee CEN/
6、SS H99. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway
7、, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2014 CEN All rights of exploit
8、ation in any form and by any means reserved worldwide for CEN national Members. Ref. No. CEN/TR 1749:2014 EPD CEN/TR 1749:2014CEN/TR 1749:2014 (E) 2 Contents Page Foreword 3 1 Scope 5 2 General scheme . 5 2.1 General 5 2.2 Type A . 5 2.3 Type B . 5 2.4 Type C . 7 3 Supplementary classification schem
9、e for type A and type B appliances fitted with particular safety devices . 11 4 Supplementary classification scheme for type B appliances for use in limited installation conditions . 11 4.1 Type B appliance utilizing a third subscript “D”). 11 4.2 Type B appliances utilizing a third subscript “P”).
10、11 4.2.1 General 11 4.2.2 Type B appliances without draught diverters . 11 4.2.3 Type B appliances with draught diverters 12 5 Supplementary classification scheme for type C appliances for use in limited installation conditions Type C1appliances utilizing a third subscript “R” . 12 Annex A (normativ
11、e) Classification according to the mode of evacuation of the products of combustion . 13 Annex B (normative) Special national appliance classification (types) Germany . 34 Annex C (informative) Special national appliance classification (types) France . 47 C.1 Classification type C4.p and C8.p 47 C.2
12、 Provisions for C4p type 47 C.3 Provisions for C8p type 47 Annex D (normative) Special national appliance classification (types) Slovenia . 48 Annex E (informative) Appliance types designed for connection to separate chimney products . 49 Table E.1 49 Bibliography 50 PD CEN/TR 1749:2014CEN/TR 1749:2
13、014 (E) 3 Foreword This document (CEN/TR 1749:2014) has been prepared by Technical Committee CEN/TC SFG_U “Sector Forum Gas Utilisation”, the secretariat of which is held by AFNOR. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. C
14、EN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes CEN/TR 1749:2009. This technical report has been prepared under the aegis of the Sector Forum Gas Utilization committee to provide guidance to CEN Technical Committees who are prep
15、aring European Standards for appliances burning combustible gases. It gives details of a general scheme for the classification of such appliances according to the method of evacuating the products of combustion. It will be stressed that this scheme only concerns gas appliances that are intended to b
16、e installed within buildings. It does not apply to outdoor appliances. Nevertheless, it is recognized that this appliance classification scheme could be utilized in other circumstances. For example, in the case of: a) appliances capable of utilizing heating oil or kerosene, and b) gas appliances int
17、ended1)for installation in a partially protected place external to a building. This form of appliance classification is widely used in the preparation of European Standards for gas appliances to identify the requirements and methods of test that are applicable to the various methods of evacuating th
18、e products of combustion. Appliances classified in this way are generally described as “types” and this description has been retained for the purposes of this general scheme. The main purpose of the scheme is to promote harmonization in the classification of appliance types. This should ensure that
19、there is a clear understanding of the various appliance types and will avoid confusion arising from Technical Committees describing them in different ways. CEN Technical committees are therefore requested to use this scheme in all circumstances in which it is appropriate. They should not deviate fro
20、m it unless there are sound technical reasons for so doing. In the preparation of this scheme it was noted that there were methods of evacuating products of combustion that were particular to a specific Technical Committee or to a particular gas appliance. These particular methods have not been incl
21、uded in the present scheme because, as indicated above, the main purpose of the scheme is to promote harmonization across Technical Committees. However, it is intended that this scheme should be reviewed from time to time in order to consider its extension to other, possibly new, methods of evacuati
22、ng products of combustion. At that time, such specific methods of evacuating products of combustion may be included at the request of the Technical Committees concerned. Explanatory notes: The following notes are given in explanation of the classification scheme. 1) If the appliance is installed in
23、a partially protected place (if this circumstance is explicitly allowed by the manufacturer) it will not change its classification (i.e. a type B53boiler will remain B53if installed in a partially protected place according to manufacturer instructions).These appliances are subject to specific additi
24、onal requirements and tests. PD CEN/TR 1749:2014CEN/TR 1749:2014 (E) 4 NOTE 1 The general scheme classifies appliances as type A, B or C according to the basic principle for the evacuation of the products of combustion. These definitions are written intentionally in very broad terms in order to cove
25、r any possible variations in the basic appliance types. A series of subscript numbers is used in addition to these letters to identify specific variations within these basic principles. Where this first subscript number exceeds “9” it is given in brackets to clarify that it is a single subscript num
26、ber and not two subscript numbers. The last subscript number of each specific variation indicates the absence or presence of an integral fan for the supply of combustion air and/or for the evacuation of the products of combustion. Where such a fan is present, the numbers 2, 3 or 4 are given. These t
27、hree numbers are used solely to identify the location of this fan. NOTE 2 Diagrams have been given in Annex A, showing examples of the various appliance types. However, it will be noted that diagrams for type C6 appliances have not been included. This is because such appliances are marketed without
28、duct systems. When installed such an appliance will have a configuration similar to one of the arrangements shown for other type C appliances. Appliance Technical Committees have the responsibility for inclusion of requirements and methods of test in their standards to ensure that type C6appliances
29、are suitable for their intended method(s) of installation. NOTE 3 The supplementary classification scheme for type A and type B appliances has been included to clarify the identification of such appliances when fitted with different safety devices. The subscript letters “AS” (atmosphere safety) refe
30、r to an atmosphere sensing device and the subscript letters “BS” (blocked safety) refer to a clearance monitoring device, which reacts to blockage or restriction of the flue system. In order to provide information about appliance types that are recognized in certain CEN member states, Annexes B, C a
31、nd D have been included in which special national appliance classifications may be identified. At present, Annex B identifies appliance types that are particular to Germany. NOTE 4 In references to a gas appliance / gas appliances connected via “its” or “their” duct or ducts, the authors of the tech
32、nical report expressed that the air inlet duct and the discharge duct for carrying any products of combustion are part of the gas appliance. This means that such ducts are certified together with the gas appliance NOTE 5 In terms of this technical report a “common duct“ is a flue duct designed and c
33、apable to discharging the products of combustion and/or air inlet duct for the air supply for more than one appliance. NOTE 6 Annex E identifies appliance types that are designed for connection to separate chimney products which may be part of the construction of the building. In terms of this techn
34、ical report a “separate chimney products“ is a flue duct approved and marketed separately from the appliance. PD CEN/TR 1749:2014CEN/TR 1749:2014 (E) 5 1 Scope This Technical Report gives details of a general scheme for the classification of gas appliances according to the method of supplying combus
35、tion air and of evacuating the products of combustion. This scheme refers to gas appliances that are intended to be installed within buildings and/or to gas appliances intended2)for installation in a partially protected place external to a building. This Technical Report is a guide for the harmoniza
36、tion of product standards and for the common understanding of the types of gas appliances. This TR is not intended to be used as an installation standard or as a product standard, nor as a reference for market surveillance. 2 General scheme 2.1 General The general scheme for type A, type B and type
37、C appliances is given in 2.2, 2.3 and 2.4 respectively. Diagrams are also given in Annex A to assist in the identification of the various appliance types. 2.2 Type A An appliance not intended for connection to a flue or to a device for evacuating the products of combustion to the outside of the room
38、 in which the appliance is installed. Type A1. An appliance without a fan. Type A2. An appliance with a fan downstream of the combustion chamber/heat exchanger. Type A3. An appliance with a fan upstream of the combustion chamber/heat exchanger. 2.3 Type B An appliance intended to be connected to a f
39、lue that evacuates the products of combustion to the outside of the room containing the appliance. The combustion air is drawn directly from the room. Type B1. A type B appliance incorporating a draught diverter. Type B11. A natural draught type B1appliance. Type B12. A type B1appliance designed for
40、 a natural draught flue incorporating a fan downstream of the combustion chamber/heat exchanger and upstream of the draught diverter. Type B13. A type B1appliance designed for a natural draught flue incorporating a fan upstream of the combustion chamber/heat exchanger. Type B14. A type B1appliance h
41、aving an integral fan downstream of both the combustion chamber/heat exchanger and the draught diverter. 2) If the appliance is installed in a partially protected place (if this circumstance is explicitly allowed by the manufacturer) it will not change its classification (i.e.: a type B53 boiler wil
42、l remain B53 if installed in a partially protected place according to manufacturer instructions).These appliances are subject to specific additional requirements and tests. PD CEN/TR 1749:2014CEN/TR 1749:2014 (E) 6 Type B2. A type B appliance without a draught diverter. Type B21.3)A natural draught
43、type B2appliance. Type B22. A type B2appliance incorporating a fan downstream of the combustion chamber/heat exchanger. Type B23. A type B2appliance incorporating a fan upstream of the combustion chamber/heat exchanger. Type B3. A type B appliance without a draught diverter, which is designed for co
44、nnection to a common duct system. This common duct system consists of a single natural draught flue. All pressurized parts of the appliance containing products of combustion are completely enclosed by parts of the appliance supplying combustion air. Combustion air is drawn into the appliance from th
45、e room by means of a concentric duct, which encloses the flue. The air enters through defined orifices situated in the surface of the duct. Type B31. A natural draught type B3appliance. Appliances of this type are not foreseen. Type B32. A type B3appliance incorporating a fan downstream of the combu
46、stion chamber/heat exchanger. Type B33. A type B3appliance incorporating a fan upstream of the combustion chamber/heat exchanger. Type B4.A type B appliance, incorporating a draught diverter, that is designed for connection via its flue duct to its flue terminal. Type B41.4)A natural draught type B4
47、appliance. Type B42. A type B4appliance designed for a natural draught flue incorporating a fan downstream of the combustion chamber/heat exchanger and upstream of the draught diverter. Type B43. A type B4appliance designed for a natural draught flue incorporating a fan upstream of the combustion ch
48、amber/heat exchanger. Type B44. A type B4appliance having an integral fan downstream of both the combustion chamber/heat exchanger and the draught diverter. Type B5.A type B appliance, without a draught diverter, that is designed for connection via its flue duct to its flue terminal. Type B51.5)A na
49、tural draught type B5appliance. Type B52. A type B5appliance incorporating a fan downstream of the combustion chamber/heat exchanger. Type B53. A type B5appliance incorporating a fan upstream of the combustion chamber/heat exchanger. 3) A type B21appliance will not generally be included in the scope of European Standards for gas appliances. However, it may apply in special circumstances e.g. gas-fired incinerators. 4) Type B 41 appliances installed in mobile homes (caravan holiday homes) are commonly described as “closed flue” appliances; this terminology being used in EN 1949
