Gas-fired storage water heaters for the production of domestic hot water

In the first indent, add types C51, C72, C73, C81 connected to an individual flue duct, C82 and C83.
Delete the first indent of the 3rd paragraph.

Gasbeheizte Vorrats-Wasserheizer für den sanitären Gebrauch

Der folgende Satz ist einzufügen:
Anforderungen an die NOx-Abgasmessung für modulierende Wasserheizer sind nicht Bestandteil dieser Ergänzung.
In der ersten Einrückung ist und durch ein Komma zu ersetzen und folgende Typen hinzuzufügen C51, C72, C73, C81 an ein einzelnes Abgasrohr angeschlossen, C82 und C83.
Die erste Einrückung des 3. Abschnittes ist zu löschen.

Appareils de production d'eau chaude par accumulation pour usages domestiques utilisant les combustibles gazeux

Ajouter la phrase suivante :
« Cet amendement ne contient pas les exigences relatives à la mesure des émissions de NOx pour les appareils modulants ».
Au premier tiret, remplacer « et » par une virgule et ajouter les types C51, C72, C73, C81 raccordé à un conduit d’évacuation individuel, C82 et C83.
Supprimer le premier tiret du 3ème paragraphe.

Akumulacijski plinski grelniki za pripravo sanitarne tople vode – Dopolnilo A3

General Information

Status
Withdrawn
Publication Date
17-Oct-2006
Withdrawal Date
12-May-2015
Current Stage
9960 - Withdrawal effective - Withdrawal
Completion Date
13-May-2015

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Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN 89:2001/A3:2007
01-februar-2007
Akumulacijski plinski grelniki za pripravo sanitarne tople vode – Dopolnilo A3
Gas-fired storage water heaters for the production of domestic hot water
Gasbeheizte Vorrats-Wasserheizer für den sanitären Gebrauch
Appareils de production d'eau chaude par accumulation pour usages domestiques
utilisant les combustibles gazeux
Ta slovenski standard je istoveten z: EN 89:1999/A3:2006
ICS:
91.140.65
SIST EN 89:2001/A3:2007 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
EUROPEAN STANDARD
EN 89:1999/A3
NORME EUROPÉENNE
EUROPÄISCHE NORM
October 2006
ICS 91.140.65
English Version
Gas-fired storage water heaters for the production of domestic
hot water

Appareils de production d'eau chaude par accumulation Gasbeheizte Vorrats-Wasserheizer für den sanitären

pour usages domestiques utilisant les combustibles gazeux Gebrauch

This amendment A3 modifies the European Standard EN 89:1999; it was approved by CEN on 28 August 2006.

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 Central Secretariat 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 Central Secretariat 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, 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

© 2006 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 89:1999/A3:2006: E

worldwide for CEN national Members.
---------------------- Page: 2 ----------------------
EN 89:1999/A3:2006 (E)
Foreword

This document (EN 89:1999/A3:2006) has been prepared by Technical Committee CEN/TC 48 “Domestic

gas-fired water heaters”, the secretariat of which is held by AFNOR.

This Amendment to the European Standard EN 89:1999 shall be given the status of a national standard,

either by publication of an identical text or by endorsement, at the latest by April 2007, and conflicting national

standards shall be withdrawn at the latest by April 2007.

The object of this amendment to EN 89 is to indicate additions, modifications and deletions to this standard

relating to:
 measurement of NO emissions of on/off water heaters;

 alignment of some requirements and tests for type C water heaters with those defined in EN 483.

According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following

countries are bound to implement this European Standard: Austria, Belgium, 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.
---------------------- Page: 3 ----------------------
EN 89:1999/A3:2006 (E)
1 Scope
Add the following sentence:

“Requirements on NO emissions measurement for modulating water heaters are not included in this

amendment.”

In the first indent, replace “and” with a comma and add types “C , C , C , C connected to an individual

51 72 73 81
flue duct, C and C ”.
82 83
Delete the first indent of the 3 paragraph.
2 Normative references
Add the following text:

“CR 1404, Determination of emissions from appliances burning gaseous fuels during type-testing”.

3.7.4
terminal
Amend the definition as follows:
“device fitted to the outside of the building, to which are connected:

 the air supply and combustion products evacuation ducts for type C and C water heaters (one or two

1 3
devices);

 the air supply duct on the one hand and the combustion products evacuation duct on the other hand for

type C water heaters (two devices);
 the air supply duct for type C water heaters (one device)”
Add the following definitions:
“3.7.10
terminal guard
device that protects the terminal from mechanical damage from outside influences
3.7.11
secondary flue

part of the flue of a type C water heater between the draught diverter/air inlet in the loft and the combustion

products outlet above the roof
3.7.12
roof space (this is sometimes called loft)

ventilated part of a building between the uppermost habitable space of the building and the roof”

---------------------- Page: 4 ----------------------
EN 89:1999/A3:2006 (E)
4.3.2.5 Type C
Delete:

“This standard does not cover this type of water heaters.” at the end of the definition of type C .

Add the following subclauses:
“4.3.2.7 Type C

A type C appliance which is connected via its vertical ducts and a draught diverter, located in the roof space,

to a secondary flue. The combustion air is taken from the roof space.
Type C

A type C appliance incorporating a fan downstream of the combustion chamber/heat exchanger.

Type C

A type C appliance incorporating a fan upstream of the combustion chamber/heat exchanger.

4.3.2.8 Type C

A type C appliance connected via one of its ducts to a single or common duct system . This duct 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.
Type C
A natural draught type C appliance.
Type C

A type C appliance incorporating a fan downstream of the combustion chamber/heat exchanger.

Type C

appliance incorporating a fan upstream of the combustion chamber/heat exchanger.”

A type C
5.1.2 Supplementary markings
After the first subclause, add:

“The water heater may carry supplementary marking concerning the class of NO emissions of the water

heater.”

This single or common duct system is part of the construction of the building and is not supplied with the appliance.

A type C appliance will not generally be included within the scope of European Standards for gas appliances.

---------------------- Page: 5 ----------------------
EN 89:1999/A3:2006 (E)
5.2.1.4 For installation of the combustion products evacuation circuit
In d), add the following indents:
 for type C water heaters:

 the information if and how the terminal shall be placed on the wall and/or on the roof space;

 the instruction that the terminal outlets from separate ducts shall fit inside a square of 50 cm;

 for type C water heaters:

 the characteristics of the shared duct systems to which the water heater may be connected;

 for type C water heaters:

 the instruction that the terminal outlets from separate ducts shall fit inside a square of 50 cm;

 for type C water heaters:

 the minimum and maximum pressure loss permitted in the air supply and combustion products

evacuation ducts, or the minimum and maximum length of these ducts;

 the combustion products temperature and mass rate at the maximum and minimum heat input with

the maximum length of ducts, if necessary;

 the characteristics of the shared duct systems to which the water heater may be connected;

 for type C water heaters:

 the instruction that the terminals for the supply of combustion air and for the evacuation of

combustion products shall not be installed on opposite walls of the building;
 for type C water heaters:

 the minimum and maximum pressure loss permitted in the air supply and combustion products

evacuation ducts, or the minimum and maximum length of these ducts;

 the combustion products temperature and mass rate at the maximum and minimum heat input;

 the instruction that the water heater shall only be installed with a terminal that complies with the

requirements of EN 1856-1 (see Annex N);

 the method of calculating the pressure loss in the air supply and combustion products evacuation

ducts, starting from the values of the temperature and mass rate of the combustion products in

relation to the CO concentration;
 for type C water heaters:

 the instruction that the draught diverter and the air intake have to be installed in the roof space of the

building;
 for type C water heaters:
---------------------- Page: 6 ----------------------
EN 89:1999/A3:2006 (E)

 the characteristics of the chimney to which the water heater may be connected.“

5.2.2.3 For type C water heaters
Add the following indent:
"- for type C water heaters the roof space shall not be used as living area."
6.1.6.2.2 Type C water heaters
Replace the first paragraph with:

“Parts which have to be removed during routine service and affect the soundness of the water heater and/or

its ducts shall be sealed by mechanical means, excluding pastes, liquids and tapes. The need for replacement

of the seal(s), following a cleaning or servicing operation as stated by the manufacturer, is permitted.

Where the water heater case forms part of the combustion circuit and it can be removed without the use of

tools, either the water heater shall not operate, or there shall be no leakage of combustion products into the

room where the water heater is installed when the case is replaced incorrectly.”
6.1.7.3 Types C and C water heaters:
1 3
Replace the title of this subclause with "Type C water heaters".
Replace the text of the subclause with:
“6.1.7.3.1 General

All water heaters shall be designed so that there is an adequate supply of combustion air during ignition and

over the whole range of possible heat inputs stated by the manufacturer. A gas/air ratio control is permitted.

Unless otherwise stated, fan-assisted water heaters may be fitted with a means of adjustment in the

combustion circuit intended to adapt the water heater to the pressure losses in the installed ducts either by

restrictors or by setting the means of adjustment to predetermined positions in accordance with detailed

instructions from the manufacturer.

According to the water heater type, the manufacturer shall supply any terminal and/or fitting piece, with the

water heater for test.
6.1.7.3.2 Air supply and combustion products evacuation ducts

The assembly of the various parts during installation shall be such that no work is necessary other than

adjusting the length of the air supply and combustion products evacuation ducts (possibly by cutting them).

Such adaptation shall not impair the correct operation of the water heater.

It shall be possible to connect the water heater, the air supply and combustion products evacuation ducts and

the terminal or fitting piece using ordinary tools if necessary. All necessary accessories and the fitting

instructions shall be supplied by the manufacturer.

The terminal outlets from separate ducts for the supply of combustion air and the evacuation of combustion

products:
 shall fit inside a square of 50 cm for types C and C water heaters;
1 3

In accordance with national regulations sampling points in the combustion circuit may be required.

---------------------- Page: 7 ----------------------
EN 89:1999/A3:2006 (E)

 may terminate in zones of different pressure for type C water heaters, but not on opposite walls of the

building.
6.1.7.3.3 Terminal

No opening in the external surfaces of the terminal shall permit the entry of a 16 mm diameter ball applied with

a force of 5 N.

Any horizontal terminal shall be designed in such a way that any condensate is discharged away from the wall.

6.1.7.3.4 Terminal guard

If the manufacturer prescribes, in the installation instructions, a protective guard for the terminal for use when

the outlets for evacuation of the combustion products open on to a walkway, this device shall be supplied to

the laboratory for test.

The dimensions of the terminal guard, when installed in accordance with the manufacturer’s instructions, shall

be such that the distance between any part of the guard and the terminal, except the wall plate, exceeds

50 mm. The guard shall not have any sharp edges likely to cause injury.
6.1.7.3.5 Fitting piece

For water heaters of types C , C and C , the fitting piece shall be designed so that it is possible to obtain the

2 4 8

distances specified by the manufacturer for the projection of the ends of the combustion air supply and

combustion products evacuation ducts into the common duct, whatever the total thickness (flue and cladding)

of the common duct.

6.1.7.3.6 Special requirements for certain components of water heaters with a fan

6.1.7.3.6.1 Fan

Direct access to the rotating parts of a fan shall be prevented. The parts of a fan in contact with combustion

products shall be effectively protected against corrosion unless they are of corrosion resistant material;

furthermore they shall withstand the temperature of the combustion products.
6.1.7.3.6.2 Air monitoring device

Except for water heaters with gas/air ratio controls, before each fan start it shall be checked that there is no

simulation of air flow in the absence of air flow.
The supply of combustion air shall be checked by one of the following methods:

 supervision of the combustion air pressure or the combustion products pressure. This supervision of

pressure is only allowed for water heaters fitted with a constant speed fan during the operation of the

main burner and where the combustion products evacuation duct is surrounded by combustion air

throughout its length, which shall not exceed 3 m. In addition the following requirements shall be fulfilled:

 the ducts shall not have adjustable or removable restrictions and
 the pressure loss of the heat exchanger shall not exceed 0,05 mbar;

 continuous supervision of the combustion air rate or the combustion products rate. In this system, the

supervision device is activated directly by the flow of combustion air or combustion products. This is also

valid for water heaters with more than one fan speed in which the flows associated with each fan speed

are monitored by separate supervision devices;
---------------------- Page: 8 ----------------------
EN 89:1999/A3:2006 (E)
 gas/air ratio control.

The following two indirect supervision methods are also allowed, but only for water heaters where the

combustion products circuit is completely surrounded by the air supply circuit or for separate ducts when the

leakage rate of the combustion products evacuation ducts meets the requirements of 7.2.2.2.1.2:

 indirect supervision (e.g. fan speed supervision) when there is an air monitoring device which

monitors the supply of combustion air at least once at each start up;

 supervision of the minimum and maximum air or combustion products rates with two rate supervision

devices.
6.1.7.3.6.3 Gas/air ratio controls

Gas/air ratio controls shall be designed and constructed so that reasonably foreseeable damage does not give

rise to a change capable of affecting safety.

Control tubes may be made of metal with suitable mechanical connections or of other materials with at least

equivalent properties and in this case are considered immune to breakage, accidental disconnection and

leakage after initial soundness checks. As such they are not subject to the tests in 7.16.2.4.2.

Control tubes for air or combustion products shall have a minimum cross-sectional area of 12 mm with a

minimum internal dimension of 1 mm. They shall be located and fixed so that any retention of condensate is

avoided and positioned such that creasing, leakage or breakage is prevented. Where more than one control

tube is used the relevant connection position for each shall be obvious. Provided that evidence is given and

precautions are taken to avoid condensation in the control tubes, the minimum cross sectional area of air

control tubes shall be 5 mm .”
6.1.7.4 Type C water heaters
Delete this subclause.
6.1.7.5 Requirements for fan-assisted water heaters
Delete this subclause.
6.4 Discharge of condensate
At the end of the first paragraph, replace "C " with "C".
7.1.5.2 Installation requirements
Replace the text of the subclause with:
"a) general

For all tests, except where otherwise stated in the particular clauses, the water heater is installed, used and put

into operation under the conditions specified in the manufacturer’s instructions.

In particular, wall-mounted water heaters are installed on a vertical test panel of plywood, or of a material with the

same thermal characteristics, in accordance with the information in the technical instructions.

The sample of the combustion products is taken in the plane perpendicular to the direction of flow of the

combustion products, and at a distance L from the extreme end of the combustion products duct (see

examples in Figures 4, 5 and 6):
---------------------- Page: 9 ----------------------
EN 89:1999/A3:2006 (E)
 for circular ducts: L=Di
 for rectangular ducts: L =
where
D is the internal diameter of the combustion products evacuation duct, in mm;
S is the cross-sectional area of this duct, in mm ;
C is the circumference of this duct, in mm.

The sampling probe is positioned so as to obtain a representative sample of the combustion products.

b) for type B water heaters

Except where otherwise stated, a type B water heater is subjected to the draught created by a test flue of height

1 m, with an internal diameter equal to the smallest diameter stated by the manufacturer in the technical

instructions and compatible with those given in Table A.7.
The thickness of the flue pipe is less than 1 mm.

If the diameter of the water heater flue socket does not correspond to the external diameter given in Table A.6, a

linking piece of thickness 1 mm is used to adapt the flue socket diameter.
The height of the flue is measured:
 for water heaters having a flue socket with a horizontal axis, from this axis;

 for water heaters having a flue socket with a vertical axis, from the plane of the flue socket outlet.

c) for type C water heaters

Except where otherwise stated, the water heater is connected to the shortest ducts with the smallest pressure

loss stated by the manufacturer in his installation instructions. If necessary, an external telescopic duct may

be sealed in accordance with the manufacturer’s instructions. The terminal guard is not fitted.

Type C , C , and C water heaters are tested with their terminals fitted. Type C , water heaters are tested with

1 3 5 1
a duct suitable for a wall with a thickness of 300 mm.

Type C , C and C water heaters are tested with their fitting pieces fitted but not connected to a test duct.

2 4 8

Type C water heaters are fitted with restrictors enabling the minimum and maximum duct pressure losses

specified by the manufacturer to be simulated.
Type C water heaters are tested with 1 m of vertical secondary flue.”

7.2.2 Soundness of the combustion circuit and evacuation of the combustion products

7.2.2.2 Type C water heaters
7.2.2.2.1 Requirements
Add under the title of the subclause the following title:
---------------------- Page: 10 ----------------------
EN 89:1999/A3:2006 (E)
“7.2.2.2.1.1 Air supply and combustion products circuit”
Add the following subclauses:
“7.2.2.2.1.2 Combustion products evacuation duct for alternative control systems
(see 6.1.7.3.6.2 indirect supervision methods)

The soundness of the combustion products evacuation duct for installation both inside and outside the room

where the water heater is installed, permitted for alternative control systems, is ensured if, under the test

conditions of 7.2.2.2.2.2, the leakage rate per surface area of the duct does not exceed 0,006 dm /(s·m ).

7.2.2.2.1.3 Separate combustion products evacuation duct

The soundness of a separate combustion products evacuation duct with respect to areas other than the room

where the water heater is installed is ensured if under the test conditions of 7.2.2.2.2.3, the leakage rate per

3 2
surface area of the duct does not exceed 0,006 dm /(s·m ).
7.2.2.2.1.4 Separate and concentric air supply ducts

The soundness of the air supply duct with respect to all areas other than the room where the water heater is

installed, is ensured if under the test conditions of 7.2.2.2.2.4 the leakage rate per surface area of the duct

3 2
does not exceed 0,5 dm /(s·m ).
7.2.2.2.1.5 Leakage of combustion products for type C water heaters

Under the test conditions of 7.2.2.2.2.5 combustion products shall only escape from the secondary flue outlet.”

7.2.2.2.2 Tests
Add under the title of the subclause the following title:
“7.2.2.2.2.1 General”
Add the following subclauses:

“7.2.2.2.2.2 Combustion products evacuation duct for alternative control systems (see 6.1.7.3.6.2)

The combustion products evacuation duct is connected to a pressure source on one side and blocked on the

other side.
The test pressure is 2 mbar.
It is checked that the requirements of 7.2.2.2.1.2 are met.
7.2.2.2.2.3 Separate combustion products evacuation duct

When tested in accordance with 7.2.2.2.1.2 but with a test pressure of 2 mbar, it is checked that the

requirements of 7.2.2.2.1.3 are met.
7.2.2.2.2.4 Separate and concentric air supply duct

When tested in accordance with 7.2.2.2.2.1, it is checked that the requirements of 7.2.2.2.1.4 are met.

---------------------- Page: 11 ----------------------
EN 89:1999/A3:2006 (E)
7.2.2.2.2.5 Leakage of combustion products for type C water heaters

The sampling probe is removed. The test is carried out with one of the reference gases, or a gas actually

distributed, for the category concerned at the nominal heat input.

Escape of combustion products is looked for with a dew point plate, whose temperature is maintained at a

value above the dew point of the ambient air. The plate is brought near to all the places around the air

inlet/draught diverter where an escape is suspected.

In doubtful cases, however, an escape is looked for with a sampling probe connected to a rapid response CO

analyser enabling concentrations of the order of 0,2 % to be detected.
It is checked that the requirement of 7.2.2.2.1.5 is satisfied.”
7.7.2.2.2.2 Type C water heaters
rd nd
In the 3 paragraph – 2 indent replace “4,5 m/s” with “3 m/s”.
Add 7.7.2.2.2.4
“7.7.2.2.2.4 Type C water heaters
a) Type C water heaters

The water heater is installed with the shortest ducts specified by the manufacturer. A negative pressure of

2 mbar is applied.

The water heater is installed with the longest ducts specified by the manufacturer. An overpressure of 2 mbar

is applied.
b) Type C and C water heaters
52 53

The water heater is installed with the shortest ducts specified by the manufacturer. A negative pressure of

2 mbar is applied.”
7.7.2.2.2.6 Fan-assisted assisted water heaters
Delete this subclause.
Add the following subclauses:
“7.7.2.2.2.6 Type C water heaters

Tests are carried out, by applying continuous down-draughts of up to 3 m/s to the top of the test flue (see

Figure 11).
A further test is carried out with the flue blocked.
7.7.2.2.2.7 Type C water heaters
a) Type C water heaters

The water heater is installed with the shortest ducts specified by the manufacturer. A negative pressure of

2 mbar in the combustion products evacuation duct is applied.
---------------------- Page: 12 ----------------------
EN 89:1999/A3:2006 (E)

The water heater is installed with the longest ducts specified by the manufacturer. An overpressure of 2 mbar

is applied at the outlet.
b) Type C and C water heaters
82 83

The water heater is installed with the shortest ducts specified by the manufacturer. A negative pressure of

2 mbar in the combustion products evacuation duct is applied.”
7.12 Combustion
Amend the end of b) of 7.12.1 Requirements, as follows:

“... with the incomplete combustion limit gas and under the conditions of 7.12.2.3.2, 7.12.2.3.3, 7.12.2.3.4,

7.12.2.3.5, 7.12.2.3.6, 7.12.2.3.7, 7.12.2.3.8 and 7.12.2.3.9.”
Replace 7.12.2.3.2 with the following:
“7.12.2.3.2 Types C and C water heaters
1 3

The test is carried out as stated in the first and third test series in 7.7.2.2.2.1, if appropriate.

For each of the test series, the value of the arithmetic mean of the CO concentrations determined at the nine

combinations of wind speed and angle of incidence that produce the highest CO concentration in the

combustion products is calculated.”
Replace 7.12.2.3.3 with the following:
“7.12.2.3.3 Type C water heaters

Under the test conditions of 7.7.2.2.2.2, it is checked that the requirements of 7.12.1 are met.”

Replace 7.12.2.3.4 with the following:
“7.12.2.3.4 Type C water heaters

Under the test conditions of 7.7.2.2.2.3, it is checked that the requirements of 7.12.1 are met.”

Add the following subclauses:
“7.12.2.3.5 Type C water heaters

Under the test conditions of 7.7.2.2.2.4, it is checked that the requirements of 7.12.1 are met.

7.12.2.3.6 Type C water heaters

These water heaters are intended to be connected to a separately approved and marketed system for the

supply of combustion air and discharge of the combustion products to which reference is made in Annex N.

Type C water heaters are fitted with a restriction to simulate the minimum pressure loss stated by the

manufacturer.

The air supply is fitted with a mixing device which permits adjustment of the re-circulation of the products of

combustion. The mixing device is adjusted such that 10 % of the combustion products are re-circulated to the

air supply.
It is checked that the requirements of 7.12.1 are met.
---------------------- Page: 13 ----------------------
EN 89:1999/A3:2006 (E)

A supplementary test is carried out by adjusting the restriction such that the air monitoring device just fails to

operate.

If the water heater is fitted with an air monitoring device that does not interrupt the gas rate before the CO

concentration exceeds 0,20 %, the test is done with a blockage that generates a CO concentration of 0,10 %

at equilibrium.

For water heaters with gas/air ratio controls the supplementary test is done at the minimum adjustable heat

input.

Under these test conditions, it is checked that the requirements of 7.12.1 are met.

7.12.2.3.7 Type C water heaters

Under the test conditions of 7.7.2.2.2.6, it is checked that the requirements of 7.12.1 are met.

7.12.2.3.8 Type C water heaters

Under the test conditions of 7.7.2.2.2.7, it is checked that the requirements of 7.12.1 are met.

7.12.2.3.9 Supplementary test for fan-assisted assisted water heaters

Fan-assisted water heaters are supplied with the reference gases for the category to which they belong at

normal pressure. It is checked that the requirements of 7.12.1 are met when the supply voltage is varied

between 85 % and 110 % of the nominal voltage stated by the manufacturer.”
7.16 Air monitoring device
7.16.1 Requirements
Replace the text with:
“7.16.1.1 General

Depending on the principle of air proving, the applicable requirements as described in 7.16.1.2, 7.16.1.3 and

7.16.1.4 shall be satisfied, under the appropriate test conditions of 7.16.2.
7.16.1.2 Supervision of the combustion air or combustion products pressure

By choice of the manufacturer, the water heater shall meet one of the following requirements:

a) under the test conditions of 7.16.2.2 a), the gas supply shall be shut off before the CO concentration

exceeds 0,20 %;

b) under the test conditions of 7.16.2.2 b) with the water heater at thermal equilibrium, the CO concentration

of the combustion products shall not exceed 0,10 %.
7.16.1.3 Supervision of the combustion air or combustion products rate

By choice of the manufacturer, the water heater shall meet one of the following requirements:

a) under the test conditions of 7.16.2.3 a), the gas supply shall be shut off before the CO concentration

exceeds 0,20 %;

b) under the test conditions of 7.16.2.3 b) with the water heater at thermal equilibrium, the CO concentration

of the combustion products shall not exceed 0,10 %;
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EN 89:1999/A3:2006 (E)

c) under the test conditions of 7.16.2.3 c), the gas supply shall be shut off before the CO concentration

exceeds 0,20 %;

d) under the test conditions of 7.16.2.3 d) with the water heater at thermal equilibrium, the CO concentration

of the combustion products shall not exceed 0,10 %.
7.16.1.4 Gas/air ratio controls
7.16.1.4.1 Endurance

Ratio controls are subjected to an endurance test of 250 000 cycles with full diaphragm travel in each cycle.

After the endurance test it is checked that the gas/air ratio control continues to operate correctly.

7.16.1.4.2 Leakage of non-metallic control tubes

When control tubes are not made of metal or of other materials with at least equivalent properties, their

disconnection, breakage or leakage shall not lead to an unsafe situatio
...

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