EN 483:1999/A4:2007
(Amendment)Gas fired central heating boilers - Type C boilers of nominal heat input not exceeding 70 kW
Gas fired central heating boilers - Type C boilers of nominal heat input not exceeding 70 kW
Delete the footnote no.1.
Heizkessel für gasförmige Brennstoffe - Heizkessel des Typs C mit einer Nennwärmebelastung gleich oder kleiner als 70 kW
Die Fußnote Nr. 1 ist zu streichen.
Chaudières de chauffage central utilisant les combustibles gazeux - Chaudières des types C dont le débit calorifique nominal est inférieur ou égal à 70 kW
Supprimer la note de bas de page n°1.
Plinski kotli za centralno gretje - Tip kotlov C z imensko močjo do vključno 70 kW - Dopolnilo A4
General Information
Relations
Standards Content (Sample)
SLOVENSKI SIST EN 483:2001/oprA4:2005
PREDSTANDARD
julij 2005
Plinski kotli za centralno ogrevanje - Tip kotlov C z imensko močjo do
vključno 70 kW – Dopolnilo A4
Gas fired central heating boilers – Type C boilers of nominal heat input not
exceeding 70kW – Amendment A4
ICS 91.140.10 Referenčna številka
SIST EN 483:2001/oprA4:2005(en)
© Standard je založil in izdal Slovenski inštitut za standardizacijo. Razmnoževanje ali kopiranje celote ali delov tega dokumenta ni dovoljeno
EUROPEAN STANDARD
DRAFT
EN 483:1999
NORME EUROPÉENNE
EUROPÄISCHE NORM
prA4
April 2005
ICS
English version
Gas fired central heating boilers - Type C boilers of nominal heat
input not exceeding 70kW
Chaudières de chauffage central utilisant les combustibles
gazeux - Chaudières des types C dont le débit calorifique
nominal est inférieur ou égal à 70 kW
This draft amendment is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee CEN/TC 109.
This draft amendment A4, if approved, will modify the European Standard EN 483:1999. If this draft becomes an amendment, CEN
members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for inclusion of this amendment
into the relevant national standard without any alteration.
This draft amendment was established by CEN 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 Management Centre has the same status
as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,
Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,
Slovenia, Spain, Sweden, Switzerland and United Kingdom.
Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without notice and
shall not be referred to as a European Standard.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36 B-1050 Brussels
© 2005 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 483:1999/prA4:2005: E
worldwide for CEN national Members.
EN 483:1999/prA4:2005 (E)
Contents
Foreword .3
1 Scope .4
2 Normative references .4
Table A4-1 – Flue duct material specification (according to EN 10088-1 and EN 573-
3 .6
Table A4-2 — Criteria for testing long-term resistance to thermal load.8
Table A4-3 — Criteria for testing long-term resistance to condensate exposure .9
Table A4-4 — Criteria for testing resistance to condensing/ non- condensing
cycling.10
Table A4-5 — Criteria for testing long-term resistance to thermal load.11
Table A4-6 — Criteria for testing-long term resistance to condensate exposure .12
Table A4-7 – Relation between test duration and temperature levels. .15
Table A4-8 – Composition of test condensate for corrosion.15
Table A4-9 – The test condensate shall have the composition.18
Table ZA.2 – Clauses of this amendment addressing essential requirements of the
GAD covering also requirements of M 105 .22
EN 483:1999/prA4:2005 (E)
Foreword
This document has been prepared by the Technical Committee CEN/TC 109 "Gas-fired central
heating boilers", the secretariat of which is held by NEN.
This document is currently submitted to the CEN Enquiry.
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.
As shown in annex ZA2 of this amendment the following essential requirements mentioned in
mandate M105 are already covered by the essential requirements of the GAD.
— Fire resistance – integrity (I);
— Gas tightness/leakage;
— Flow resistance;
— Dimensioning;
— Flexural tensile strength;
— Compressive strength;
— Durability of tightness/leakage against chemicals/corrosion;
— Durability of flexural tensile strength against chemicals;
— Durability of compressive strength against chemicals
— Fire Reaction.
To fulfill the Gas appliance Directive this standard contains normative paragraphs specifying
requirements for combustion products evacuation ducts, which are part of an appliance.
This draft Amendment has been prepared to amplify the requirements and test methods for flues
supplied as an integral part of the boiler to support the EU Directive 89/106/EEC on construction
products.
Additionally, this Amendment specifies requirements, test procedures and reporting of information
necessary for flue design for boilers where the flue is not supplied as an integral part of the boiler.
Requirements and test methods for combustion products evacuation ducts made of metal are covered
in the present version of this amendment. The introduction of combustion products evacuation ducts
made of plastic and elastomeric seals are under preparation by TC109.
EN 483:1999/prA4:2005 (E)
1 Scope
Delete the footnote no.1.
2 Normative references
EN 573-3, Aluminium and aluminium alloys – Chemical composition and forms of wrought products –
Part 3: Chemical composition
EN 1856-1, Chimneys – Requirements for metal chimneys – Part 1: System chimney products
EN 1859, Chimneys – Metal chimneys – Test methods
EN 13501-1, Fire classification of construction products and building elements – Part 1: Classification
using test data from reaction to fire tests
EN 13501-2, Fire classification of construction products and building elements – Part 2: Classification
using data from fire resistance tests, excluding ventilation services
EN 13216-1, Chimneys – Test methods for system chimney – Part 1: General test methods
EN 14471, Chimneys – System chimneys with plastic flue liners – Requirements and test methods
ISO 37:1994, Rubber, vulcanized or thermoplastic – Determination of tensile stress-strain properties
ISO 178:2001, Plastics – Determination of flexural properties
ISO 179:1997, Plastics – Determination of Charpy impact properties
ISO 188:1998, Rubber, vulcanized or thermoplastic – Accelerated ageing and heat resistance tests
ISO 527-1:1993, Plastics – Determination of tensile properties – Part 1: General principles
ISO 527-2:1993, Plastics – Determination of tensile properties – Part 2: Test conditions for moulding
and extrusion plastics
ISO 815:1991, Rubber, vulcanized or thermoplastic – Determination of compression set at ambient,
elevated or low temperatures
ISO 1183:1987, Plastics – Methods for determining the density and relative density of non-cellular
plastics
ISO 1817:1999, Rubber, vulcanized – Determination of the effect of liquids
ISO 2781:1988, Rubber, vulcanized – Determination of density
ISO 6914:2004, Rubber, vulcanized or thermoplastic – Determination of ageing characteristics by
measurement of stress relaxation
ISO 7619:1997, Rubber – Determination of indentation hardness by means of pocket hardness meters
ISO 9969:1994, Thermoplastics pipes – Determination of ring stiffness
ISO 10888:1999, Keyless type three-jaw drill chucks – Specification
EN 483:1999/prA4:2005 (E)
Add a new definition 3.3.2.11 as follows:
3.3.2.11 Ducts support
accessory used to fix, or transfer the load of, air supply and combustion product evacuation ducts to
structural elements (building, etc.)
Add a new definition 3.4.17 as follows:
3.4.17 Overheat combustion products temperature
maximum temperature of the combustion products in case of overheat, at the exit of the boiler where it
is intended to be connected to a duct, flue or chimney
5.3 Materials and thicknesses
5.3.1 General
Add in the first sentence of the first paragraph after the words ", .of the boilers":
",including ducts, terminals and fitting pieces, if any,"
Delete the fourth paragraph of clause 5.3.1.
Remark; now included in a new clause 6.10.
5.3.5 Separate combustion product evacuation ducts
5.3.5.1 Stability under mechanical loading
This clause of EN 483 is not applicable.
Add a new clause:
“5.4.4.7 Dimensions and of air supply and combustion product evacuation ducts connection pieces
For boilers of types C , C , C and C where the boiler is to be connected to separately supplied air
2 4 6 8
supply and combustion product evacuation ducts, the manufacturer shall quote the nominal size of
ducts on the boiler or the fitting piece to which air supply and combustion product evacuation ducts are
to be connected. These connections may be concentric or separate.
In cases where the ducts, spigots or sockets are not of a circular cross section a detailed dimensioned
drawing shall be provided.
6.2.2.1 General
Modify
nd
Alter the present 2 sentence: Soundness is verified before and after all the tests of this standard,
except the tests according to clause 7.10.
Add a new clause 6.2.2.7:
6.2.2.7 Durability against corrosion
The durability against corrosion of the combustion product evacuation duct is demonstrated by fulfilling
either:
— the requirements in table A4-1 or
— the corrosion test method A1 from normative Annex A of EN 1856-1
EN 483:1999/prA4:2005 (E)
Table A4-1 – Flue duct material specification (according to EN 10088-1 and EN 573-3
Material Type Material No. Symbol Minimal Minimal
Thickness Thickness
non- condensing
condensing
mm mm
10 EN AW – 4047A EN AW Al Si 12(B) and 0,5 1,5
CU <0,1%, Zn<0,15%
(cast aluminium)
11 EN AW – 1200A EN AW-AL 99,0 (A) 0,5 1,5
13 EN AW-6060 EN AW-AI MgSi 0,5 1,5
40 1.4401 X5CrNiMo 17-12-2 0,4 0,6
a
50 1.4404 X2CrNiMo 17-12-2 0,4 0,6
60 1.4432 X2CrNiMo 17-12-3 0,4 0,6
70 1.4539 X1NiCrMoCu 25-20-5 0,4 0,6
a o
Equivalent for material N 1.4404 = 1.4571 (symbol X6CrNiMoTi 17-12-2).
6.4.1 Limiting temperatures
Rename the existing clause 6.4.1.2 from
6.4.1.2 Limiting temperatures of the side walls, the front and the top
to
6.4.1.2 Limiting temperatures of the side walls, the front and the top of the outside of the
boiler and of the ducts
Modify the existing clause 6.4.1.3 from
6.4.1.3 Limiting temperatures of the test panels and floor
to
6.4.1.3 Limiting temperatures adjacent to the boiler casing and ducts
Reword the text of clause 6.4.1.3 to:
The temperature of the floor on which the boiler is placed, where appropriate, that of the panels placed
at the side of and behind the boiler and the surfaces adjacent to ducts and/or terminal shall not, at any
point, exceed the ambient temperature by more than 80 K under the test conditions of 7.4.1.4.
When this temperature rise is between 60 K and 80 K, the manufacturer shall state in the technical
instructions for the installer the nature of the protection which has to be applied between the boiler and
the adjacent surfaces when these latter are made of inflammable materials.
This protection shall be supplied to the test laboratory, which shall check that, with the boiler fitted with
it, the surface temperatures measured under the test conditions of 7.4.1.4 do not exceed the ambient
temperature by more than 60 K.
Add a new sub clause 6.5.7.4:
6.5.7.4 Overheat combustion products temperature
EN 483:1999/prA4:2005 (E)
For the purpose of flue design, the overheat temperature of the combustion products shall be recorded
at the outlet of the boiler. The test shall be carried out according to 7.5.7.4.
Add a new clause 6.10
6.10 Mechanical resistance and stability of ducts, terminal and fitting pieces
Where the air supply and combustion product evacuation ducts are supplied or specified by the
manufacturer the ducts, terminal and fitting pieces shall meet the following conditions.
6.10.1 Compressive Strength
6.10.1.1 Duct sections and fittings
Where compressive stresses occur in the air supply or combustion products evacuation ducts, due to
the weight of the duct components, the ducts shall show no permanent deformation when tested in
accordance with 7.10.1.1.
6.10.1.2 Ducts support
When tested in accordance with 7.10.1.2, the maximum displacement of the ducts at the support shall
not be greater than 5 mm in the direction of the load.
6.10.1.3 Vertical terminals
When tested in accordance with 7.10.1.3, the terminal shall show no permanent deformation.
6.10.2 Lateral strength
6.10.2.1 Flexural tensile strength
When the manufacturer declares the air supply and combustion product evacuation ducts to be
suitable for non-vertical installation, these ducts are tested in accordance with 7.10.3.1. The deflection
of any part shall not be more than 2 mm per meter in distance between supports.
6.10.2.2 Components subject to wind load
When the manufacturer declares a certain length of the air supply and combustion product evacuation
ducts to be suitable for external installation, the ducts shall show no permanent deformations when
tested in accordance with 7.10.2.2.”
Add a new clause 6.11
6.11 Requirements for plastic in the combustion product evacuation ducts, terminals and fitting
pieces for boilers
6.11.1 Performance requirements
6.11.1.1 Fire resistance
For the resistance from external to external the performance criteria of integrity and insulation shall be
declared in accordance with EN 13501-2 in relation to the outer wall.
6.11.1.2 Thermal resistance
If
...
SLOVENSKI STANDARD
01-marec-2008
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'RSROQLOR$
Gas fired central heating boilers - Type C boilers of nominal heat input not exceeding 70
kW
Heizkessel für gasförmige Brennstoffe - Heizkessel des Typs C mit einer
Nennwärmebelastung gleich oder kleiner als 70 kW
Chaudieres de chauffage central utilisant les combustibles gazeux - Chaudieres des
types C dont le débit calorifique nominal est inférieur ou égal a 70 kW
Ta slovenski standard je istoveten z: EN 483:1999/A4:2007
ICS:
91.140.10 Sistemi centralnega Central heating systems
ogrevanja
97.100.20 Plinski grelniki Gas heaters
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD
EN 483:1999/A4
NORME EUROPÉENNE
EUROPÄISCHE NORM
December 2007
ICS 91.140.10
English Version
Gas fired central heating boilers - Type C boilers of nominal heat
input not exceeding 70 kW
Chaudières de chauffage central utilisant les combustibles Heizkessel für gasförmige Brennstoffe - Heizkessel des
gazeux - Chaudières des types C dont le débit calorifique Typs C mit einer Nennwärmebelastung gleich oder kleiner
nominal est inférieur ou égal à 70 kW als 70 kW
This amendment A4 modifies the European Standard EN 483:1999; it was approved by CEN on 2 November 2007.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for inclusion of this
amendment into the relevant 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 amendment exists in three official versions (English, French, German). A version in any other language made by translation under the
responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36 B-1050 Brussels
© 2007 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 483:1999/A4:2007: E
worldwide for CEN national Members.
Contents Page
Foreword.3
1 Modification to the scope .4
2 Modification to Clause 2 “Normative references”.4
3 Modification to Clause 3 “Terms and definitions” .5
5 Modification to Clause 5 “Constructional requirements” .5
6 Modification to Clause 6 “Operational requirements”.6
7 Modification to Clause 7 “Test methods” .13
8 Modification t o subclause 8.2 “Instructions” .20
Annex R .23
Annex S.24
Bibliography .25
Foreword
This document (EN 483:1999/A4:2007) has been prepared by the Technical Committee CEN/TC 109 "Central
heating boilers using gaseous fuels", the secretariat of which is held by NEN.
This Amendment to the European Standard EN 483:1999 shall be given the status of a national standard,
either by publication of an identical text or by endorsement, at the latest by June 2008, and conflicting national
standards shall be withdrawn at the latest by June 2008.
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).
As shown in informative Annex S of this amendment the following essential requirements mentioned in
mandate M105 are already covered by the essential requirements of the GAD.
— Fire resistance – integrity (I);
— Gas tightness/leakage;
— Flow resistance;
— Dimensioning;
— Flexural tensile strength;
— Compressive strength;
— Durability of tightness/leakage against chemicals/corrosion;
— Durability of flexural tensile strength against chemicals;
— Durability of compressive strength against chemicals
— Fire Reaction.
To fulfil the Gas Appliance Directive this standard contains normative paragraphs specifying requirements for
combustion air supply and combustion products evacuation ducts, which are part of an appliance.
This Amendment has been prepared to amplify the requirements and test methods for air supply and
combustion products evacuation duct designed by the boiler manufacturer and marketed as an integral part of
the boiler to support the EU Directive 89/106/EEC on construction products.
Additionally, this Amendment specifies requirements, test procedures and reporting of information related to
boilers that are to be connected to air supply and combustion products evacuation ducts that are not supplied
as an integral part of the boiler.
If declared by the appliance manufacturer, air supply and combustion products evacuation ducts complying
with the relevant harmonised standards of CEN/TC166 for chimneys, can also be used. It is essential that the
combination of appliance and its ducts still fulfil all relevant requirements of this standard.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech
Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and United Kingdom.
1 Modification to the scope
Delete footnote n°.1.
2 Modification to Clause 2 “Normative references”
Add the following normative references in Clause 2:
EN 513, Unplasticized polyvinylchloride (PVC-U) profiles for the fabrication of windows and doors
Determination of the resistance to artificial weathering
EN 13216-1:2004, Chimneys Test methods for system chimneys– Part 1: General test methods
EN 13501-1, Fire classification of construction products and building elements Part 1: Classification using
data from reaction to fire tests
EN 14241-1: 2005, Chimneys Elastomeric seals and elastomeric sealants Material requirements and
test methods Part 1: Seals in flue liners
EN 14471:2005, Chimneys System chimneys with plastic flue liners Requirements and test methods
EN ISO 178, Plastics Determination of flexural properties (ISO 178:2001)
EN ISO 179-1, Plastics Determination of Charpy impact properties Part 1: Non-instrumented impact test
(ISO 179-1:2000)
EN ISO 527-1, Plastics Determination of tensile properties Part 1: General principles (ISO 527-1:1993
including Corr 1:1994)
EN ISO 527-2, Plastics Determination of tensile properties Part 2: Test conditions for moulding and
extrusion plastics (ISO 527-2:1993 including Corr 1:1994)
Methods for determining the density of non-cellular plastics
EN ISO 1183, Plastics
EN ISO 9969, Thermoplastics pipes Determination of ring stiffness (ISO 9969:1994)
ISO 37, Rubber, vulcanized or thermoplastic – Determination of tensile stress-strain properties
ISO 188, Rubber, vulcanized or thermoplastic Accelerated ageing and heat resistance tests
ISO 815, Rubber, vulcanized or thermoplastic Determination of compression set at ambient, elevated or
low temperatures
ISO 1817, Rubber, vulcanized Determination of the effect of liquids
ISO 2781, Rubber, vulcanized Determination of density
ISO 6914, Rubber, vulcanized or thermoplastic Determination of ageing characteristics by measurement of
stress relaxation
ISO 7619, Rubber, vulcanized or thermoplastic Determination of indentation hardness
In the original Clause 2 replace the following three standards:
prEN 1856-1, Chimneys Performance requirements for metal chimneys Part 1: System chimney
products
prEN 1856-2, Chimneys Performance requirements for metal chimneys Part 2: Metal liners and
connecting flue pipes products
EN 1859, Chimneys Metal chimneys Test methods
with:
EN 1856-1:2003, Chimneys Requirements for metal chimneys Part 1: System chimney products
EN 1856-2, Chimneys Requirements for metal chimneys Part 2: Metal liners and connecting flue pipes
EN 1859:2000, Chimneys Metal chimneys Test methods
3 Modification to Clause 3 “Terms and definitions”
Add a new definition 3.3.2.11 as follows:
3.3.2.11
ducts support
accessory used to fix, or transfer the load of, air supply and combustion product evacuation ducts to
structural elements (building, etc.)
Add a new definition 3.4.17 as follows:
3.4.17
overheat combustion products temperature
maximum temperature of the combustion products in case of overheat, at the exit of the boiler where it is
intended to be connected to a duct, flue or chimney
Add a new definition 3.4.18 as follows:
3.4.18
nominal working combustion products temperature
maximum temperature of the combustion products in case of normal functioning, at the exit of the boiler
where it is intended to be connected to a duct or chimney. Normal functioning is considered to reflect the
°
situation of running the boiler at inlet/outlet temperatures of 70/90 C, and just at the point that the control
thermostat is switching. (See also 7.4.1.1)
3.4.19
condensing operation mode of flue system
operation mode where, under normal operation conditions, flue gas condensate is available
5 Modification to Clause 5 “Constructional requirements”
5.3.1 General
Add in the first sentence of the first paragraph after the words ", .of the boilers" ", including connecting
ducts, ducts and terminals , if any,"
Delete the fourth paragraph of 5.3.1.
Remark; now included in a new subclause 6.10.
5.3.5 Separate combustion product evacuation ducts
5.3.5.1
Stability under mechanical loading
Delete this subclause.
6 Modification to Clause 6 “Operational requirements”
6.2.2.1 General
Replace the 3rd sentence with the following: “Soundness is verified before and after all the tests of this
standard, except the tests specified in 7.10.”
Add a new subclause 6.2.2.7:
6.2.2.7 Durability against corrosion
The durability against corrosion of the combustion product evacuation duct is demonstrated by fulfilling
either:
— the requirements in Table A4-1 or
— a corrosion test method from normative Annex A of EN 1856-1:2003.
Table A4-1 Flue duct material specification
Material Symbol Minimum Minimum
Nominal nominal
Thickness Thickness
b) b)
non- condensing condensing
mm mm
EN AW – 4047A EN AW Al Si 12 (A), and 0,5 1,5
CU <0,1%, Zn<0,15%
(cast aluminium)
EN AW – 1200A EN AW-AL 99,0 (A) 0,5 1,5
EN AW-6060 EN AW-AI MgSi 0,5 1,5
1.4401 X5CrNiMo 17-12-2 0,4 0,4
a)
0,4 0,4
1.4404 X2CrNiMo 17-12-2
1.4432 X2CrNiMo 17-12-3 0,4 0,4
1.4539 X1NiCrMoCu 25-20-5 0,4 0,4
c) c)
1.4401 X5CrNiMo 17-12-2 0,11 0,11
a c) c)
1.4404 X2CrNiMo 17-12-2 0,11 0,11
c) c)
1.4432 X2CrNiMo 17-12-3 0,11 0,11
c) c)
1.4539 X1NiCrMoCu 25-20-5 0,11 0,11
a) o
Equivalent for material N 1.4404 = 1.4571 (symbol X6CrNiMoTi 17-12-2).
b)
According to declaration of manufacturer, see definition 3.4.19
c)
Flexible liners only allowed when installed in an existing chimney
The actual minimum thickness of the materials shall always be greater than 90 % of the minimum nominal
thicknesses.
6.4.1 Limiting temperatures
Rename the existing subclause 6.4.1.2 from
6.4.1.2 Limiting temperatures of the side walls, the front and the top
to
6.4.1.2 Limiting temperatures of the side walls, the front and the top of the outside of the boiler and of
the ducts
Modify the existing subclause 6.4.1.3 from
6.4.1.3 Limiting temperatures of the test panels and floor
to
6.4.1.3 Limiting temperatures adjacent to the boiler casing and ducts
Reword the text of subclause 6.4.1.3 to
The temperature of the floor on which the boiler is eventually placed, where appropriate, that of the panels
placed at the side of and behind the boiler and the surfaces adjacent to ducts and/or terminal shall not, at
any point, exceed the ambient temperature by more than 80 K under the test conditions of 7.4.1.4.
If this temperature rise is between 60 K and 80 K, the manufacturer shall state in the technical instructions
for the installer the nature of the protection which has to be applied between the boiler and the adjacent
surfaces when these latter are made of inflammable materials.
This protection shall be supplied to the test laboratory, which shall check that, with the boiler fitted with it,
the surface temperatures measured under the test conditions of 7.4.1.4 do not exceed the ambient
temperature by more than
...
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