EN 777-2:1999/A2:2001

SLOVENSKI STANDARD
01-april-2002
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Multi-burner gas-fired overhead radiant tube heater systems for non-domestic use - Part
2: System E, safety
Gasgeräte-Heizstrahler - Dunkelstrahlersysteme mit mehreren Brennern mit Gebläse für
gewerbliche und industrielle Anwendung - Teil 2: System E, Sicherheit
Tubes radiants suspendus a multi-bruleurs utilisant les combustibles gazeux a usage
non domestique - Partie 2: Systeme E, sécurité
Ta slovenski standard je istoveten z: EN 777-2:1999/A2:2001
ICS:
97.100.20
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 777-2:1999/A2
NORME EUROPÉENNE
EUROPÄISCHE NORM
July 2001
ICS 97.100.20
English version
Multi-burner gas-fired overhead radiant tube heater systems for
non-domestic use - Part 2: System E, safety
Tubes radiants suspendus à multi-brûleurs utilisant les Gasgeräte-Heizstrahler - Dunkelstrahlersysteme mit
combustibles gazeux à usage non domestique - Partie 2: mehreren Brennern mit Gebläse für gewerbliche und
Système E, sécurité industrielle Anwendung - Teil 2: System E, Sicherheit
This amendment A2 modifies the European Standard EN 777-2:1999; it was approved by CEN on 9 June 2001.
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 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 Management Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,
Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, 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
© 2001 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 777-2:1999/A2:2001 E
worldwide for CEN national Members.

Foreword
This Amendment EN 777-2:1999/A2:2001 to EN 777-2:1999 has been prepared by Technical Committee
CEN/TC 180 "Non-domestic gas-fired overhead radiant heaters", the secretariat of which is held by BSI.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by January 2002, and conflicting national standards
shall be withdrawn at the latest by January 2002.
This Amendment to the European Standard EN 777-2:1999 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).
This Amendment modifies EN 777-2:1999. It has been prepared to incorporate the general amendments
to EN 777-2:1999 and EN 437:1993 + A1:1997 + A2:1999.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Czech
Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg,
Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom.
Contents
Delete annex E:
‘Annex E (normative) Extract from prEN 50165:1995 ‘Electrical equipment of non-electrical
heating appliances for household and similar purposes. Safety requirements’.
Re-letter annex F and annex G as follows :
“Annex E (informative) Identification of the types of gas in use in the various countries
Annex F (normative) Special national conditions”
Re-letter annex H and annex I as follows :
“Annex G (informative) Example of calculation of the weighing factors for an appliance with
several rates
Annex H (informative) Calculation of conversions of NO ”
x
Add the following annex I :
Annex I (informative) National situations of countries whose national bodies are CEN
associate members”.
Foreword
Replace the final paragraph by the following:
‘The test gases, test pressures and appliance categories given in this European Standard are
in accordance with those specified in EN 437:1993 + A1:1997 + A2:1999 ‘Test gases - Test
pressures - Appliance categories.’
1 Scope
In paragraph 1, reword the text in parenthesis as follows:
‘…. (called system E and referred to in the body of the text as the “system”)….’.
2 Normative references
Amend the reference to EN 257 and EN 437 as follows:
‘EN 257:1992+A1:1996 Mechanical thermostats for gas-burning appliances
EN 437: 1993 + A1:1997 + A2:1999 Test gases – Test pressures – Appliance categories’.
Amend the reference to prEN 50165 as follows:
‘EN 50165:1997/A1:2001 Electrical equipment of non-electrical heating appliances for household
and similar purposes. Safety requirements; Amendment 1’.
Add the following reference:
‘ISO 7005-1: 1992 Metallic flanges - Part 1: Steel flanges’.
Delete the following references:
‘EN 60730-1:1995 and EN 61058-1:1992’.
3 Definitions
In definitions 3.3.1, 3.3.2, 3.3.3, and 3.3.4 replace:
‘[EN 437:1993]’ by ‘[EN 437:1993 + A2:1999]’.
In definition 3.3.3, reword the title and unit to the following:
‘Volume flow rate
3 3
Unit: cubic metre per hour (m /h), litre per minute (l/min), cubic decimetre per hour (dm /h), or
cubic decimetre per second (dm /s)’.
Insert the following definition after 3.3.13:
‘3.3.14
extinction safety time
the time which elapses between the moment when the supervised flame is extinguished and the
moment when the automatic burner control system initiates shut-down of the burner by removing
power to the automatic gas shut-off valves’.
Amend the definition numbers as follows (the definitions are to be retained):
‘3.3.15 start-gas flame
3.3.16 running condition of the system
3.3.17 controlled shut-down
3.3.18 safety shut-down
3.3 19 lock out
3.3.19.1 non-volatile lock-out
3.3.19.2 volatile lock-out
3.3.20 spark restoration
3.3.21 automatic re-cycling’.
In definitions 3.4.1, 3.4.3, 3.4.4, 3.4.5, 3.4.6 and 3.4.7 replace:
‘[EN 437:1993]’ by ‘[EN 437:1993 + A2:1999]’.
In the first line of definition 3.4.1, add
‘complete’ before ‘combustion’.
Reword definition 3.5.3 to read:
‘a condition of the installation required for some tests and obtained by heating to thermal
equilibrium at nominal heat input’.
5.1.6 Inlet connections
Reword indent e) to read:
‘e) a flange to ISO 7005-1:1992, ISO 7005-2:1988 or ISO 7005-3:1988.’
5.1.8 Electrical equipment
Replace paragraphs 1 and 2 by the following paragraph:
‘The electrical equipment of the system shall be so designed and constructed as to obviate
hazards of electrical origin and shall comply with the requirements of EN 50165:1997/A1:2001
which cover such hazards.’
5.2.12.3 Pre-purging
Reword paragraph 2 to read:
‘Under the test conditions described in 7.2.2, the purge period shall be at least 10 s.’
7.1.1 Characteristics of test gases: reference and limit gases
In paragraph 2, replace:
‘EN 437:1993’ by ‘EN 437:1993+ A2:1999’.
7.1.4 Test pressures
In paragraph 2, in parenthesis replace:
‘annex G’ by ‘annex F’ and add ‘and annex I for national situations of countries whose
national bodies are CEN associate members.’
Table 6 Test pressures where a pressure couple exists
In footnote 2) replace:
‘annex G’ by ‘annex F’.
7.1.5.1 Tests requiring the use of reference gas
In the first sentence, delete
‘7.3.3,’.
7.4.1 General
In the definition for NO , in the note, replace:
x,m
‘annex I’ by ‘annex H’.
7.4.2.3 Systems with several rates
In the final paragraph in parenthesis, replace:
‘annex H’ by ‘annex G’ and ‘annex I’ by ‘annex H’.
Table 8 Symbol of the type of gas
In the list of first family gases, delete:
‘G 140  1d’.
8.1.5.2 Type of gas
In the final paragraph replace:
‘annex F’ by ‘annex E’.
8.1.5.5 Category
Replace:
‘EN 437:1993’ by ‘EN 437:1993 + A2:1999’.
Table B.1.1 Single categories marketed
Replace the table by the following table:
Table B.1.1 — Single categories marketed
Country I I I I I I I I
2H 2L 2E 2E+ 3B/P 3+ 3P 3B
AT X X
BE X X X
CH X X X X
CZ X X X
DE X X X
DK X X
ES X X X X
FI X X
2) 2) 1)
FR X X XX XX
GB X X X X
GR X X X X
IE X X X X
IS
IT X X
LU X
2)
X
NL XX X
NO X
PT X X X X
SE X X
1)
Categories applicable only to certain types of system specified in the individual standards. (France to specify).
2)
Categories applicable only to certain types of system, submitted to on site EC verification procedure, Annex II article 6 of
the Gas Appliance Directive (90/396/EE). (France and Netherlands to clarify if applicable here).
Table B.1.2 Double categories marketed
Replace the table by the following table:
Table B.1.2 — Double categories marketed
Country II II II II II II II II II II
1a2H 2H3B/P 2H3+ 2H3P 2L3B/P 2L3P 2E3B/P 2E+3B/P 2E+3+ 2E+3P
AT X
BE
CH X X X X
CZ X X
DE X
DK X X
3)
ES X X X
FI X
2) 2) 1)
FR X X X XX
GB X X
GR X X X
IE X X
IS
IT X X
LU
NL X X
NO
PT X X
SE X X
1) 2)
, See notes to Table B.1.1.
3)
Systems of this category set for group H gases of the second family may use air and commercial propane gas mixtures where the
3 3
gross Wobbe index (at 15 C and 1 013, 25 mbar) is between 46 MJ/m and 51,5 MJ/m , at the same supply pressure, without additional
tests.
Table B.2 – Normal supply pressures
Replace the table by the following table:
Table B.2 – Normal supply pressures
Gas G 110 G 20 G 25 G 20 + G 25 G 30 G 31 G 30 + G 31
Pressure 8 20 20 25 Couple 30 50 30 37 50 Couple Couple
(mbar) 20/25 28- 30 28-30/37 50/67
Country
AT X X X
2)
BE X X X XX
CH X X X X X
3) 4) 5)
CZ X X XX X
DE X X X X X
DK X X X
2)
ES X X X X X X
FI X X X
2) 2)
FR X X X XX X
1)
GB X XXXX
GR X X XX XX
IE X X X X
IS X
IT X X X
LU X
NL X X X
NO X X
PT X X X X
SE X X X X
1)
Normal supply pressure for this system 17,5 mbar.
2)
Only for certain types of non-domestic system. (Countries to clarify).
3)
Currently 18 mbar.
4)
For certain types of industrial systems. (CZ to clarify).
5)
For certain types of system. (CZ to clarify).
Table B.3 Test gases corresponding to categories marketed nationally or locally
Replace the table with the following table:
Table B.3 — Test gases corresponding to categories marketed nationally or locally
Category Reference gas Incomplete Light back limit gas Lift limit gas Sooting limit Country
combustion gas
limit gas
I2Esi, I2Er G 20, G 25 G 21 G 222 G 231 G 21 FR
I G 20, G 25 G 21 G 222 G 231 G 21 BE
2E(S)B
I G 20, G 25 G 21 G 222 G 231 G 21 BE
2E(R)B
I G 20, G 25 G 21 G 222 G 231 G 21 DE
2ELL
G 271
II G 130, G 20 G 21 G 132, G 222 G 23 G 21 CH
1c2H
II G 130 G 20 G 21 G 132 G 222 G 231 G 21 FR
1c2E+
II G 130 G 21 G 132 G 231 G 21 FR
1c2Esi
II G 20, G 25 G 222
1c2Er
II2Esi3+ G 20, G 25 G 21 G 222 G 231 G 30 FR
II G 30 G 32 G 31
2Er3+
II G 20, G 25 G 21 G 222 G 231 G 31 FR
2Esi3P
II G 31 G 32 G 271 G 32
2Er3P
II G 20, G 25 G 21 G 222 G 231 G 30 DE
2ELL3B/P
G 30 G 30 G 32 G 271
III G 110,G 20 G 21 G 112 G 23 G 30 DK, IT
1a2H3B/P
G 30 G 222, G 32 G 31
III G 130,G 20 G 21 G 132 G 23 G 30 CH
1c2H3B/P
G 30 G 222, G 32 G 31
III G 130,G 20 G 21 G 132 G 23 G 30 CH
1c2H3+
G 30 G 222, G 32 G 31
III G 130,G 20 G 21 G 132 G 23 G 31 CH
1c2H3P
G 30 G 222, G 32 G 31 G 32
III G 130,G 20 G 21 G 132 G 231 G 30 FR
1c2E+3+
G 30 G 222, G 32 G 31
III G 130,G 20 G 21 G 132 G 231 G 32 FR
1c2E+3P
G 31 G 222, G 32 G 31
III G 130,G 20 G 21 G 132 G 231 G 30 FR
1c2Esi3+
III G 25, G 30 G 222, G 32 G 31
1c2Er3+
III G 130,G 20 G 21 G 132 G 231 G 32 FR
1c2Esi3P
III G 25, G 31 G 222, G 32 G 31
1c2Er3P
III G 110,G 120 G 21 G 112 G 23 G 30 SE
1ab2H3B/P
G 20, G 30 G 222, G 32 G 31
III G 150, G 20, G 21 G 152 G 23, G 31 G 30 ES
1c2H3+
G 30 G 222, G 32
III G 110, G 130 G 21 G 112 G 23 G 30 ES
1ace2H3+
G 150, G 20 G 222, G 32 G 31
G 30
B.3.2.1.1 Systems designed for the use of gases linked to the first family
Delete the following category:
‘Category I : systems using only gases of group d linked to the first family (this category is
1d
not used).’
B.3.2.2.1 Systems designed to use gases of the first family or that are linked to it and gases of
the second family or that are linked to it
Delete the following categories:
‘Category II , Category II , Category II , Category II and Category II .’
1ab2E 1ad2E 1ab2ELL 1ad2ELL 1abd2ELL
At the end add the following Category:
‘Category II : systems capable of using gases of group c linked to the first family and gases
1c2H
of group H of the second family. The gases linked to the first family are used under the same
conditions as for category I . The second family gases are used under the same conditions
1c
as for category I .’
2H
B.3.2.3 Category III
Add the following categories after Category III :
1a2H3B/P
‘Category III : systems capable of using gases of group c linked to the first family,
1c2H3B/P
gases of group H of the second family and gases of the third family. The first family gases are
used under the same conditions as for category I . The second family gases are used under
1c
the same conditions as for category I . The third family gases are used under the same
2H
conditions as for category I .
3B/P
Category III : systems capable of using gases of group c linked to the first family, gases
1c2H3+
of group H of the second family and gases of the third family. The first family gases are used
under the same conditions as for category I . The second family gases are used under the
1c
same conditions as for category I . The third family gases are used under the same
2H
conditions as for category I .
3+
Category III : systems capable of using gases of group c linked to the first family, gases
1c2H3P
of group H of the second family an
...