SIST-TP CEN/TR 1749:2014
(Main)European scheme for the classification of gas appliances according to the method of evacuation of the combustion products (types)
European scheme for the classification of gas appliances according to the method of evacuation of the combustion products (types)
CEN/TR 1749 gives details of a general scheme for the classification of gas appliances according to the method of supplying combustion 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 intended) for installation in a partially protected place external to a building. This Technical Report is a guide for the harmonization 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.
Europäischer Leitfaden für die Klassifizierung von Gasgeräten nach der Art der Abgasabführung (Arten)
Modèle européen pour la classification des appareils utilisant les combustibles gazeux selon le mode d'évacuation des produits de combustion (types)
Evropska shema za razvrščanje plinskih aparatov glede na način odvajanja produktov zgorevanja (tipi)
Standard CEN/TR 1749 navaja podrobnosti splošne sheme za razvrščanje plinskih aparatov glede na način dovajanja zraka za zgorevanje in odvajanja produktov zgorevanja. Ta shema se nanaša na plinske aparate, ki so namenjeni vgradnji v stavbe, in/ali na plinske aparate, namenjene vgradnji v delno zaščiten prostor zunaj stavbe. To tehnično poročilo je vodilo za harmonizacijo standardov za proizvode in za splošno razumevanje tipov plinskih aparatov. To tehnično poročilo ni namenjeno uporabi kot standard za vgradnjo ali standard za proizvod ali kot sklicevanje za nadzor trga.
General Information
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Standards Content (Sample)
SLOVENSKI STANDARD
SIST-TP CEN/TR 1749:2014
01-september-2014
1DGRPHãþD
SIST-TP CEN/TR 1749:2010
(YURSVNDVKHPD]DUD]YUãþDQMHSOLQVNLKDSDUDWRYJOHGHQDQDþLQRGYDMDQMD
SURGXNWRY]JRUHYDQMD WLSL
European scheme for the classification of gas appliances according to the method of
evacuation of the combustion products (types)
Ta slovenski standard je istoveten z: CEN/TR 1749:2014
ICS:
91.140.40 Sistemi za oskrbo s plinom Gas supply systems
SIST-TP CEN/TR 1749:2014 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST-TP CEN/TR 1749:2014
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SIST-TP CEN/TR 1749:2014
TECHNICAL REPORT
CEN/TR 1749
RAPPORT TECHNIQUE
TECHNISCHER BERICHT
June 2014
ICS 91.140.40 Supersedes CEN/TR 1749:2009
English 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/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, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United
Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2014 CEN All rights of exploitation in any form and by any means reserved Ref. No. CEN/TR 1749:2014 E
worldwide for CEN national Members.
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SIST-TP CEN/TR 1749:2014
CEN/TR 1749:2014 (E)
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 scheme 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” . 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
appliances utilizing a third subscript “R” . 12
conditions — Type C
1
Annex A (normative) 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 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
2
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SIST-TP CEN/TR 1749:2014
CEN/TR 1749:2014 (E)
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. CEN [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 preparing 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 be 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
1)
b) gas appliances intended 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 the 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 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
from 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 included 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 evacuating 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 a partially protected place (if this circumstance is explicitly allowed by the manufacturer)
it will not change its classification (i.e. a type B boiler will remain B if installed in a partially protected place according to
53 53
manufacturer instructions).These appliances are subject to specific additional requirements and tests.
3
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CEN/TR 1749:2014 (E)
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 cover 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 number 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 three 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 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 C appliances are suitable for their intended method(s) of installation.
6
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)
refer 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
and 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 technical 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 capable 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 technical report a "separate chimney products" is a flue duct
approved and marketed separately from the appliance.
4
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SIST-TP CEN/TR 1749:2014
CEN/TR 1749:2014 (E)
1 Scope
This Technical Report gives details of a general scheme for the classification of gas appliances according to
the method of supplying combustion air and of evacuating the products of combustion. This scheme refers to
2)
gas appliances that are intended to be installed within buildings and/or to gas appliances intended for
installation in a partially protected place external to a building.
This Technical Report is a guide for the harmonization 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 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 in which the appliance is installed.
Type A . An appliance without a fan.
1
Type A . An appliance with a fan downstream of the combustion chamber/heat exchanger.
2
Type A . An appliance with a fan upstream of the combustion chamber/heat exchanger.
3
2.3 Type B
An appliance intended to be connected to a flue 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 B . A type B appliance incorporating a draught diverter.
1
Type B . A natural draught type B appliance.
11 1
Type B . A type B appliance designed for a natural draught flue incorporating a fan downstream of the
12 1
combustion chamber/heat exchanger and upstream of the draught diverter.
Type B . A type B appliance designed for a natural draught flue incorporating a fan upstream of the
13 1
combustion chamber/heat exchanger.
Type B . A type B appliance having an integral fan downstream of both the combustion chamber/heat
14 1
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 will remain B53 if installed in a partially protected place according
to manufacturer instructions).These appliances are subject to specific additional requirements and tests.
5
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SIST-TP CEN/TR 1749:2014
CEN/TR 1749:2014 (E)
Type B . A type B appliance without a draught diverter.
2
3)
Type B . A natural draught type B appliance.
21 2
Type B . A type B appliance incorporating a fan downstream of the combustion chamber/heat exchanger.
22 2
Type B . A type B appliance incorporating a fan upstream of the combustion chamber/heat exchanger.
23 2
Type B . A type B appliance without a draught diverter, which is designed for connection to a common duct
3
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 the 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 B . A natural draught type B appliance.
31 3
Appliances of this type are not foreseen.
Type B . A type B appliance incorporating a fan downstream of the combustion chamber/heat exchanger.
32 3
Type B . A type B appliance incorporating a fan upstream of the combustion chamber/heat exchanger.
33 3
Type B A type B appliance, incorporating a draught diverter, that is designed for connection via its flue duct
4.
to its flue terminal.
4)
Type B . A natural draught type B appliance.
41 4
Type B . A type B appliance designed for a natural draught flue incorporating a fan downstream of the
42 4
combustion chamber/heat exchanger and upstream of the draught diverter.
Type B . A type B appliance designed for a natural draught flue incorporating a fan upstream of the
43 4
combustion chamber/heat exchanger.
Type B . A type B appliance having an integral fan downstream of both the combustion chamber/heat
44 4
exchanger and the draught diverter.
Type B A type B appliance, without a draught diverter, that is designed for connection via its flue duct to its
5.
flue terminal.
5)
Type B . A natural draught type B appliance.
51 5
Type B . A type B appliance incorporating a fan downstream of the combustion chamber/heat exchanger.
52 5
Type B . A type B appliance incorporating a fan upstream of the combustion chamber/heat exchanger.
53 5
3) A type B appliance will not generally be included in the scope of European Standards for gas appliances. However,
21
it may apply in special circumstances e.g. gas-fired incinerators.
4) Type B appliances installed in mobile homes (caravan holiday homes) are commonly described as “closed flue”
41
appliances; this terminology being used in EN 1949, which covers the installation of such appliances.
5) A type B appliance will not generally be included in the scope of European Standards for gas appliances. However,
51
it may apply in special circumstances e.g. gas-fired incinerators.
6
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SIST-TP CEN/TR 1749:2014
CEN/TR 1749:2014 (E)
2.4 Type C
An 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.
Type C . A type C appliance that is designed for connection via its ducts to its horizontal terminal, which at the
1
same time admits fresh air to the burner and discharges the products of combustion to the outside through
orifices that are either concentric or close enough to come under similar wind conditions.
Type C . A natural draught type C appliance.
11 1
Type C . A type C appliance incorporating a fan downstream of the combustion chamber/heat exchanger.
12 1
Type C . A type C appliance incorporating a fan upstream of the combustion chamber/heat exchanger.
13 1
6)
Type C . A type C appliance connected via its two ducts to a common duct system serving more than one
2
appliance. This system consists of a single duct, which supplies the combustion air and evacuates the
7)
products of combustion .
Type C . A natural draught type C appliance.
21 2
Type C . A type C appliance incorporating a fan downstream of the combustion chamber/heat exchanger.
22 2
Type C . A type C appliance incorporating a fan upstream of the combustion chamber/heat exchanger.
23 2
Type C . A type C appliance that is designed for connection via its ducts to a vertical terminal, which at the
3
same time admits fresh air to the burner and discharges the products of combustion to the outside through
orifices that are either concentric or close enough to come under similar wind conditions.
Type C . A natural draught type C appliance.
31 3
Type C . A type C appliance incorporating a fan downstream of the combustion chamber/heat exchanger.
32 3
Type C . A type C appliance incorporating a fan upstream of the combustion chamber/heat exchanger.
33 3
8)
Type C . A type C appliance connected via its two ducts to a common duct system designed for more than
4
one appliance. This common duct system consists of two ducts connected to a terminal, which at the same
time admits fresh air to the burner and discharges the products of combustion to the outside through orifices
that are either concentric or close enough to come under similar wind conditions.
Type C . A natural draught type C appliance.
41 4
Type C . A type C appliance incorporating a fan downstream of the combustion chamber/heat exchanger.
42 4
Type C . A type C appliance incorporating a fan upstream of the combustion chamber/heat exchanger.
43 4
Type C . A type C appliance connected via its separate ducts to separate terminals for the supply of
5
combustion air and the evacuation of the products of combustion. These ducts may terminate in zones of
different pressure.
6) This common duct system is part of the building and not a part of the appliance.
7) This appliance type is now obsolete and unlikely to be called up in future European standards for gas appliances.
8) This common duct system is part of the building and not a part of the appliance.
7
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SIST-TP CEN/TR 1749:2014
CEN/TR 1749:2014 (E)
Type C . A natural draught type C appliance.
51 5
. A type C appliance incorporating a fan downstream of the combustion chamber/heat exchanger.
Type C
52 5
. A type C appliance incorporating a fan upstream of the combustion chamber/heat exchanger.
Type C
53 5
. A type C appliance which is intended to be connected to a separately approved and marketed
Type C
6
system for the supply of combustion air and discharge of the combustion products. (see note 2 given in the
foreword).
. A natural draught type C appliance.
Type C
61 6
. A type C appliance incorporating a fan downstream of the combustion chamber/heat exchanger.
Type C
62 6
. A type C appliance incorporating a fan upstream of the combustion chamber/heat exchanger.
Type C
63 6
. A type C appliance in which the combustion air supply and the combustion products evacuation is
Type C
7
provided by its two vertical ducts. The combustion air is taken from a loft and the products of combustion are
discharged above the roof. A draught diverter is incorporated in the combustion products evacuation duct at a
9)
location above the combustion air inlet orifice(s) .
Type C . A natural draught type C appliance.
71 7
Type C . A type C appliance incorporating a fan downstream of the combustion chamber/heat exchanger.
72 7
Type C . A type C appliance incorporating a fan upstream of the combustion chamber/heat exchanger.
73 7
10)
Type C . A type C appliance connected via one of its ducts to a single or common duct system . This duct
8
system consists of a single natural draught duct (i.e. not incorporating a fan) that evacuates the products of
combustion. The appliance is connected via a second of its ducts to a terminal, which supplies air to the
appliance from outside the building.
11)
Type C . A natural draught type C appliance.
81 8
Type C . A type C appliance incorporating a fan downstream of the combustion chamber/heat exchanger.
82 8
Type C . A type C appliance incorporating a fan upstream of the combustion chamber/heat exchanger.
83 8
Type C . A type C appliance that is designed for connection via its flue duct to a vertical terminal and via its
9
air inlet duct to an existing vertical duct. The terminal at the same time admits fresh air to the burner and
discharges the products of combustion to the outside through orifices that are either concentric or close
enough to come under similar wind conditions.
9) This appliance type is now obsolete and unlikely to be called up in future European standards for gas appliances.
10) This single or common duct system is part of the building and not a part of the appliance.
11) A type C appliance will not generally be included within the scope of European Standards for gas appliances.
81
8
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SIST-TP CEN/TR 1749:2014
CEN/TR 1749:2014 (E)
12)
The air inlet duct , or part of it, is an existing vertical duct within the building e.g. a converted chimney.
Type C .A natural draught type C appliance.
91 9
Type C A type C appliance incorporating a fan downstream of the combustion chamber/heat exchanger.
92. 9
Type C . A type C appliance incorporating a fan upstream of the combustion chamber/heat exchanger.
93 9
13)
Type C “A type C appliance connected via its two ducts to a common duct system designed for more
(10)
than one appliance. This common duct system consists of two ducts connected to a terminal, which at the
same time admits fresh air to the burner and discharges the products of combustion to the outside through
orifices that are either concentric or close enough to come under similar wind conditions.
The C(10) appliance is designed to become connected to a common duct system that is designed to operate
under the conditions where the static pressure in the common flue duct might exceed the static pressure in the
common air duct.”
Type C A type C appliance incorporating a fan downstream of the combustion chamber/heat
(10)2. (10)
exchanger.
Type C . A type C appliance incorporating a fan upstream of the combustion chamber/heat exchanger.
(10)3 (10)
Type C A type C appliance connected via its two ducts to its common ducts which are designed for more
(11)
than one appliance.
These common ducts consist of two ducts connected to their terminals, which at the same time admit fresh air
to the burner and discharge the products of combustion to the outside through orifices that are either
concentric or close enough to come under similar wind conditions.
The C appliance is designed to become connected to its common ducts where the static pressure in the
(11)
common flue duct might exceed the static pressure in the common air duct.
NOTE 1 The C appliance is designed and/or specified as an integral part of a specific combined system including a
(11)
number of type C appliances and its complete air/flue ducts and terminals. This complete system is evaluated and certified
under the GAD (in analogy with the types C1, C3, C5).
Type C A type C appliance incorporating a fan downstream of the combustion chamber/heat
(11)2. (11)
exchanger.
Type C . A type C appliance incorporating a fan upstream of the combustion chamber/heat exchanger.
(11)3 (11)
14)
Type C . A type C appliance connected via one of its ducts to a common flue duct system . The appliance
(12)
is connected via a second of its ducts to a terminal, which supplies air to the appliance from outside the
building.
A type C appliance is designed to become connected to a common flue duct that is designed to operate
(12)
under the conditions where the static pressure in the common flue duct might exceed the static pressure in the
individual air ducts.
12) The vertical air inlet duct is part of the building and not a part of the appliance.
13) This common duct system is part of the building and not a part of the appliance.
14) This single or common duct system is part of the building and not a part of the appliance.
9
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CEN/TR 1749:2014 (E)
Type C A type C appliance incorporating a fan downstream of the combustion chamber/heat
(12)2. (12)
exchanger.
. A type C appliance incorporating a fan upstream of the combustion chamber/heat exchanger.
Type C
(12)3 (12)
. A type C appliance connected via one of its ducts to a common duct system which is designed for
Type C
(13)
more than one appliance. The appliance is connected via a second of its ducts to a terminal, which supplies
air to the appliance from outside the building.
The C appliance is designed to become connected to its common duct where the static pressure might
(13)
exceed the static pressure in its individual air supply duct.
NOTE 2 The C appliance is designed and/or specified as an integral part of a specific combined system including a
(13)
number of type C appliances and its complete air/flue ducts and terminals. This complete system is evaluated and certified
under the GAD (in analogy with the types C1, C3, C5).
Type C A type C appliance incorporating a fan downstream of the combustion chamber/heat
(13)2. (13)
exchanger.
. A type C appliance incorporating a fan upstream of the combustion chamber/heat exchanger.
Type C
(13)3 (13)
. A type C appliance connected via its flue duct to its common flue duct which is designed for more
Type C
(14)
than one appliance. The appliance is connected via its air inlet duct to a common existing vertical duct, which
supplies air to the appliance from outside the building.
These common duct consist of two ducts connected to their terminals, which at the same time admit fresh air
to the burner and discharge the products of combustion to the outside through orifices that are either
concentric or close enough to come under similar wind conditions.
The C appliance is designed to become connected to its common duct where the
...
SLOVENSKI STANDARD
kSIST-TP FprCEN/TR 1749:2014
01-maj-2014
(YURSVNDVKHPD]DUD]YUãþDQMHSOLQVNLKDSDUDWRYJOHGHQDQDþLQRGYDMDQMD
SURGXNWRY]JRUHYDQMD WLSL
European scheme for the classification of gas appliances according to the method of
evacuation of the combustion products (types)
Ta slovenski standard je istoveten z: FprCEN/TR 1749
ICS:
91.140.40 Sistemi za oskrbo s plinom Gas supply systems
kSIST-TP FprCEN/TR 1749:2014 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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kSIST-TP FprCEN/TR 1749:2014
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kSIST-TP FprCEN/TR 1749:2014
TECHNICAL REPORT
FINAL DRAFT
FprCEN/TR 1749
RAPPORT TECHNIQUE
TECHNISCHER BERICHT
February 2014
ICS 91.140.40 Will supersede CEN/TR 1749:2009
English Version
European scheme for the classification of gas appliances
according to the method of evacuation of the combustion
products (types)
This draft Technical Report is submitted to CEN members for Technical Committee Approval. It has been drawn up by the Technical
Committee CEN/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, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United
Kingdom.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are aware and to
provide supporting documentation.
Warning : This document is not a Technical Report. It is distributed for review and comments. It is subject to change without notice and
shall not be referred to as a Technical Report.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2014 CEN All rights of exploitation in any form and by any means reserved Ref. No. FprCEN/TR 1749:2014 E
worldwide for CEN national Members.
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kSIST-TP FprCEN/TR 1749:2014
FprCEN/TR 1749:2014 (E)
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 scheme 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” . 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 C appliances utilizing a third subscript “R” . 12
1
Annex A (normative) 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 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
Bibliography . 50
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FprCEN/TR 1749:2014 (E)
Foreword
This document (FprCEN/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/BNG.
This document is currently submitted to the Technical Committee Approval.
This document will supersede 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 preparing 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 be 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
1)
b) gas appliances intended 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 the 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 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
from 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 included 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 evacuating 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 a partially protected place (if this circumstance is explicitly allowed by the manufacturer)
it will not change its classification (i.e. a type B boiler will remain B if installed in a partially protected place according to
53 53
manufacturer instructions).These appliances are subject to specific additional requirements and tests.
3
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FprCEN/TR 1749:2014 (E)
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 cover 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 number 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 three 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 should
be noted that diagrams for type C6 appliances have not been included. This is because such appliances are marketed
without 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 C appliances are suitable for their intended method(s) of installation.
6
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)
refer 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
and 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 technical 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 capable 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 technical report a "separate chimney products" is a flue duct
approved and marketed separately from the appliance.
4
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FprCEN/TR 1749:2014 (E)
1 Scope
This Technical Report gives details of a general scheme for the classification of gas appliances according to
the method of supplying combustion air and of evacuating the products of combustion. This scheme refers to
2)
gas appliances that are intended to be installed within buildings and/or to gas appliances intended for
installation in a partially protected place external to a building.
This Technical Report is a guide for the harmonization 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 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 in which the appliance is installed.
Type A . An appliance without a fan.
1
Type A . An appliance with a fan downstream of the combustion chamber/heat exchanger.
2
Type A . An appliance with a fan upstream of the combustion chamber/heat exchanger.
3
2.3 Type B
An appliance intended to be connected to a flue 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 B . A type B appliance incorporating a draught diverter.
1
Type B . A natural draught type B appliance.
11 1
Type B . A type B appliance designed for a natural draught flue incorporating a fan downstream of the
12 1
combustion chamber/heat exchanger and upstream of the draught diverter.
Type B . A type B appliance designed for a natural draught flue incorporating a fan upstream of the
13 1
combustion chamber/heat exchanger.
Type B . A type B appliance having an integral fan downstream of both the combustion chamber/heat
14 1
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 will remain B53 if installed in a partially protected place according
to manufacturer instructions).These appliances are subject to specific additional requirements and tests.
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Type B . A type B appliance without a draught diverter.
2
3)
Type B . A natural draught type B appliance.
21 2
Type B . A type B appliance incorporating a fan downstream of the combustion chamber/heat exchanger.
22 2
Type B . A type B appliance incorporating a fan upstream of the combustion chamber/heat exchanger.
23 2
Type B . A type B appliance without a draught diverter, which is designed for connection to a common duct
3
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 the 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 B . A natural draught type B appliance.
31 3
Appliances of this type are not foreseen.
Type B . A type B appliance incorporating a fan downstream of the combustion chamber/heat exchanger.
32 3
Type B . A type B appliance incorporating a fan upstream of the combustion chamber/heat exchanger.
33 3
Type B A type B appliance, incorporating a draught diverter, that is designed for connection via its flue duct
4.
to its flue terminal.
4)
Type B . A natural draught type B appliance.
41 4
Type B . A type B appliance designed for a natural draught flue incorporating a fan downstream of the
42 4
combustion chamber/heat exchanger and upstream of the draught diverter.
Type B . A type B appliance designed for a natural draught flue incorporating a fan upstream of the
43 4
combustion chamber/heat exchanger.
Type B . A type B appliance having an integral fan downstream of both the combustion chamber/heat
44 4
exchanger and the draught diverter.
Type B A type B appliance, without a draught diverter, that is designed for connection via its flue duct to its
5.
flue terminal.
5)
Type B . A natural draught type B appliance.
51 5
Type B . A type B appliance incorporating a fan downstream of the combustion chamber/heat exchanger.
52 5
Type B . A type B appliance incorporating a fan upstream of the combustion chamber/heat exchanger.
53 5
3) A type B appliance will not generally be included in the scope of European Standards for gas appliances. However,
21
it may apply in special circumstances e.g. gas-fired incinerators.
4) Type B appliances installed in mobile homes (caravan holiday homes) are commonly described as “closed flue”
41
appliances; this terminology being used in EN 1949, which covers the installation of such appliances.
5) A type B appliance will not generally be included in the scope of European Standards for gas appliances. However,
51
it may apply in special circumstances e.g. gas-fired incinerators.
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2.4 Type C
An 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.
Type C . A type C appliance that is designed for connection via its ducts to its horizontal terminal, which at the
1
same time admits fresh air to the burner and discharges the products of combustion to the outside through
orifices that are either concentric or close enough to come under similar wind conditions.
Type C . A natural draught type C appliance.
11 1
Type C . A type C appliance incorporating a fan downstream of the combustion chamber/heat exchanger.
12 1
Type C . A type C appliance incorporating a fan upstream of the combustion chamber/heat exchanger.
13 1
6)
Type C . A type C appliance connected via its two ducts to a common duct system serving more than one
2
appliance. This system consists of a single duct, which supplies the combustion air and evacuates the
7)
products of combustion .
Type C . A natural draught type C appliance.
21 2
Type C . A type C appliance incorporating a fan downstream of the combustion chamber/heat exchanger.
22 2
Type C . A type C appliance incorporating a fan upstream of the combustion chamber/heat exchanger.
23 2
Type C . A type C appliance that is designed for connection via its ducts to a vertical terminal, which at the
3
same time admits fresh air to the burner and discharges the products of combustion to the outside through
orifices that are either concentric or close enough to come under similar wind conditions.
Type C . A natural draught type C appliance.
31 3
Type C . A type C appliance incorporating a fan downstream of the combustion chamber/heat exchanger.
32 3
Type C . A type C appliance incorporating a fan upstream of the combustion chamber/heat exchanger.
33 3
8)
Type C . A type C appliance connected via its two ducts to a common duct system designed for more than
4
one appliance. This common duct system consists of two ducts connected to a terminal, which at the same
time admits fresh air to the burner and discharges the products of combustion to the outside through orifices
that are either concentric or close enough to come under similar wind conditions.
Type C . A natural draught type C appliance.
41 4
Type C . A type C appliance incorporating a fan downstream of the combustion chamber/heat exchanger.
42 4
Type C . A type C appliance incorporating a fan upstream of the combustion chamber/heat exchanger.
43 4
Type C . A type C appliance connected via its separate ducts to separate terminals for the supply of
5
combustion air and the evacuation of the products of combustion. These ducts may terminate in zones of
different pressure.
6) This common duct system is part of the building and not a part of the appliance.
7) This appliance type is now obsolete and unlikely to be called up in future European standards for gas appliances.
8) This common duct system is part of the building and not a part of the appliance.
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Type C . A natural draught type C appliance.
51 5
. A type C appliance incorporating a fan downstream of the combustion chamber/heat exchanger.
Type C
52 5
. A type C appliance incorporating a fan upstream of the combustion chamber/heat exchanger.
Type C
53 5
. A type C appliance which is intended to be connected to a separately approved and marketed
Type C
6
system for the supply of combustion air and discharge of the combustion products. (see note 2 given in the
foreword).
. A natural draught type C appliance.
Type C
61 6
. A type C appliance incorporating a fan downstream of the combustion chamber/heat exchanger.
Type C
62 6
. A type C appliance incorporating a fan upstream of the combustion chamber/heat exchanger.
Type C
63 6
. A type C appliance in which the combustion air supply and the combustion products evacuation is
Type C
7
provided by its two vertical ducts. The combustion air is taken from a loft and the products of combustion are
discharged above the roof. A draught diverter is incorporated in the combustion products evacuation duct at a
9)
location above the combustion air inlet orifice(s) .
Type C . A natural draught type C appliance.
71 7
Type C . A type C appliance incorporating a fan downstream of the combustion chamber/heat exchanger.
72 7
Type C . A type C appliance incorporating a fan upstream of the combustion chamber/heat exchanger.
73 7
10)
Type C . A type C appliance connected via one of its ducts to a single or common duct system . This duct
8
system consists of a single natural draught duct (i.e. not incorporating a fan) that evacuates the products of
combustion. The appliance is connected via a second of its ducts to a terminal, which supplies air to the
appliance from outside the building.
11)
Type C . A natural draught type C appliance.
81 8
Type C . A type C appliance incorporating a fan downstream of the combustion chamber/heat exchanger.
82 8
Type C . A type C appliance incorporating a fan upstream of the combustion chamber/heat exchanger.
83 8
Type C . A type C appliance that is designed for connection via its flue duct to a vertical terminal and via its
9
air inlet duct to an existing vertical duct. The terminal at the same time admits fresh air to the burner and
discharges the products of combustion to the outside through orifices that are either concentric or close
enough to come under similar wind conditions.
9) This appliance type is now obsolete and unlikely to be called up in future European standards for gas appliances.
10) This single or common duct system is part of the building and not a part of the appliance.
11) A type C appliance will not generally be included within the scope of European Standards for gas appliances.
81
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12)
The air inlet duct , or part of it, is an existing vertical duct within the building e.g. a converted chimney.
Type C .A natural draught type C appliance.
91 9
Type C A type C appliance incorporating a fan downstream of the combustion chamber/heat exchanger.
92. 9
Type C . A type C appliance incorporating a fan upstream of the combustion chamber/heat exchanger.
93 9
13)
Type C “A type C appliance connected via its two ducts to a common duct system designed for more
(10)
than one appliance. This common duct system consists of two ducts connected to a terminal, which at the
same time admits fresh air to the burner and discharges the products of combustion to the outside through
orifices that are either concentric or close enough to come under similar wind conditions.
The C(10) appliance is designed to become connected to a common duct system that is designed to operate
under the conditions where the static pressure in the common flue duct might exceed the static pressure in the
common air duct.”
Type C A type C appliance incorporating a fan downstream of the combustion chamber/heat
(10)2. (10)
exchanger.
Type C . A type C appliance incorporating a fan upstream of the combustion chamber/heat exchanger.
(10)3 (10)
Type C A type C appliance connected via its two ducts to its common ducts which are designed for more
(11)
than one appliance.
These common ducts consist of two ducts connected to their terminals, which at the same time admit fresh air
to the burner and discharge the products of combustion to the outside through orifices that are either
concentric or close enough to come under similar wind conditions.
The C appliance is designed to become connected to its common ducts where the static pressure in the
(11)
common flue duct might exceed the static pressure in the common air duct.
NOTE 1 The C appliance is designed and/or specified as an integral part of a specific combined system including a
(11)
number of type C appliances and its complete air/flue ducts and terminals. This complete system is evaluated and certified
under the GAD (in analogy with the types C1, C3, C5).
Type C A type C appliance incorporating a fan downstream of the combustion chamber/heat
(11)2. (11)
exchanger.
Type C . A type C appliance incorporating a fan upstream of the combustion chamber/heat exchanger.
(11)3 (11)
14)
Type C . A type C appliance connected via one of its ducts to a common flue duct system . The appliance
(12)
is connected via a second of its ducts to a terminal, which supplies air to the appliance from outside the
building.
A type C appliance is designed to become connected to a common flue duct that is designed to operate
(12)
under the conditions where the static pressure in the common flue duct might exceed the static pressure in the
individual air ducts.
Type C A type C appliance incorporating a fan downstream of the combustion chamber/heat
(12)2. (12)
exchanger.
12) The vertical air inlet duct is part of the building and not a part of the appliance.
13) This common duct system is part of the building and not a part of the appliance.
14) This single or common duct system is part of the building and not a part of the appliance.
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FprCEN/TR 1749:2014 (E)
Type C . A type C appliance incorporating a fan upstream of the combustion chamber/heat exchanger.
(12)3 (12)
. A type C appliance connected via one of its ducts to a common duct system which is designed for
Type C
(13)
more than one appliance. The appliance is connected via a second of its ducts to a terminal, which supplies
air to the appliance from outside the building.
The C appliance is designed to become connected to its common duct where the static pressure might
(13)
exceed the static pressure in its individual air supply duct.
NOTE 2 The C appliance is designed and/or specified as an integral part of a specific combined system including a
(13)
number of type C appliances and its complete air/flue ducts and terminals. This complete system is evaluated and certified
under the GAD (in analogy with the types C1, C3, C5).
Type C A type C appliance incorporating a fan downstream of the combustion chamber/heat
(13)2. (13)
exchanger.
. A type C appliance incorporating a fan upstream of the combustion chamber/heat exchanger.
Type C
(13)3 (13)
. A type C appliance connected via its flue duct to its common flue duct which is designed for more
Type C
(14)
than one appliance. The appliance is connected via its air inlet duct to a common existing vertical duct, which
supplies air to the appliance from outside the building.
These common duct consist of two ducts connected to their terminals, which at the same time admit fresh air
to the burner and discharge the products of combustion to the outside through orifices that are either
concentric or close enough to come under similar wind conditions.
The C appliance is designed to become connected to its common duct where the static pressure might
(14)
exceed the sta
...
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