prEN 17692

Central heating boilers - Main specification for indirectly heated unvented (closed) metallic pressurized buffer tanks - Requirements, testing and marking

This document specifies the essential terms, constructional requirements, tests, energy assessment and marking of indirectly heated water storage tanks for primary water (buffer tanks), with a capacity not exceeding 2,000 litres, an operating temperature not exceeding 95 °C, and an operating pressure not exceeding 1,0 MPa.
This document covers metallic and plastic made buffer tanks.
Although this document does not consider any buffer tanks mainly intended for direct firing, it allows for the provision of electric heating elements for auxiliary purposes.
NOTE   The energy assessment is performed by EN 15332.

Zentralheizungskessel - Beschreibungen für mittelbar beheizte, unbelüftete (geschlossene), metallene unter Druck stehende Pufferspeicher - Anforderungen, Prüfung und Kennzeichnung

Dieses Dokument enthält Festlegungen zu wesentlichen Begriffen, bautechnischen Anforderungen, Prüfungen, energetischer Bewertung und Kennzeichnung von indirekt beheizten Heizwasserspeichern (Pufferspeichern) mit einem Nennvolumen, das 2 000 l nicht überschreitet, einer Betriebstemperatur, die 95 °C nicht überschreitet, und einem Betriebsdruck, der 1,0 MPa nicht überschreitet.
In diesem Dokument werden Pufferspeicher aus Metall und Pufferspeicher aus Kunststoff behandelt.
Obwohl in diesem Dokument keine Pufferspeicher berücksichtigt werden, die hauptsächlich für eine direkte Erwärmung vorgesehen sind, lässt dieses Dokument die Bereitstellung elektrischer Heizelemente zu Hilfszwecken zu.
ANMERKUNG   Die energetische Bewertung erfolgt nach EN 15332.

Chaudières de chauffage central - Spécification principale pour ballons tampons pressurisés métalliques non ouverts à l'air libre (fermés) - Exigences, essais et marquage

Le présent document spécifie les termes essentiels, les exigences de construction, les essais, l'évaluation de la performance énergétique et le marquage des ballons de stockage d'eau primaire (ballons tampons), à chauffage indirect d'une capacité ne dépassant pas 2 000 l, une température de fonctionnement ne dépassant pas 95 °C, et une pression de fonctionnement ne dépassant pas 1,0 MPa.
Le présent document couvre les ballons tampons métalliques et en plastique.
Même si le présent document ne traite pas des ballons tampons principalement destinés au chauffage direct, il prévoit la fourniture d'éléments chauffants électriques à des fins accessoires.
NOTE   L'évaluation de la performance énergétique est effectuée conformément à l'EN 15332.

Kotli za centralno ogrevanje - Glavna specifikacija za posredno ogrevane, neprezračevane (zaprte) kovinske rezervoarje pod tlakom - Zahteve, preskušanje in označevanje

General Information

• Status: Not Published
• ICS: 91.140.10 - Central heating systems
• Technical Committee: CEN/TC 57 - Central heating boilers
• Drafting Committee: CEN/TC 57/WG 8 - Energy efficiency requirements for warm water storage tanks
• Current Stage: 4599 - Dispatch of FV draft to CMC - Finalization for Vote
• Directive: 812/2013 - Commission Delegated Regulation (EU) No 812/2013 of 18 February 2013 supplementing Directive 2010/30/EU of the European Parliament and of the Council with regard to the energy labelling of water heaters, hot water storage tanks and packages of water heater and solar device
• Directive: 813/2013 - Commission Regulation (EU) No 813/2013 of 2 August 2013 implementing Directive 2009/125/EC of the European Parliament and of the Council with regard to ecodesign requirements for space heaters and combination heaters
• Directive: 814/2013 - Commission Regulation (EU) No 814/2013 of 2 August 2013 implementing Directive 2009/125/EC of the European Parliament and of the Council with regard to ecodesign requirements for water heaters and hot water storage tanks
• Mandate: M/534 - [C(2015)2625] Standardisation request to the European standardisation organisations pursuant to Article 10(1) of Regulation (EU) No 1025/2012 of the European Parliament and of the Council in support of implementation of Commission Regulation (EU) No 814/2013 of 2 August 2013 implementing Directive 2009/125/EC of the European Parliament and of the Council with regard to ecodesign requirements for water heaters and hot water storage tanks and Commission Delegated Regulation (EU) No 812/2013 of 18 February 2013 supplementing Directive 2010/30/EU of the European Parliament and of the Council with regard to the energy labelling of water heaters, hot water storage tanks and packages of water heater and solar device
• Ref Project: oSIST prEN 17692:2021 - Central heating boilers - Main specification for indirectly heated unvented (closed) metallic pressurized buffer tanks - Requirements, testing and marking

Standards Content (sample)

SLOVENSKI STANDARD
oSIST prEN 17692:2021
01-julij-2021
Kotli za centralno ogrevanje - Glavna specifikacija za posredno ogrevane,
neprezračevane (zaprte) kovinske rezervoarje pod tlakom - Zahteve, preskušanje
in označevanje

Central heating boilers - Main specification for indirectly heated unvented (closed)

metallic pressurized buffer tanks - Requirements, testing and marking
Zentralheizungskessel - Beschreibungen für indirekt beheizte, unbelüftete
(geschlossene), metallene unter Druck stehende Pufferspeicher - Anforderungen,
Prüfung und Kennzeichnung
Ta slovenski standard je istoveten z: prEN 17692
ICS:
27.060.30 Grelniki vode in prenosniki Boilers and heat exchangers
toplote
91.140.10 Sistemi centralnega Central heating systems
ogrevanja
oSIST prEN 17692:2021 en,fr,de

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

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oSIST prEN 17692:2021
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oSIST prEN 17692:2021
DRAFT
EUROPEAN STANDARD
prEN 17692
NORME EUROPÉENNE
EUROPÄISCHE NORM
July 2021
ICS 91.140.10
English Version
Central heating boilers - Main specification for indirectly
heated unvented (closed) metallic pressurized buffer
tanks - Requirements, testing and marking
Zentralheizungskessel - Beschreibungen für indirekt
beheizte, unbelüftete (geschlossene), metallene unter
Druck stehende Pufferspeicher - Anforderungen,
Prüfung und Kennzeichnung

This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee

CEN/TC 57.

If this draft becomes a European Standard, CEN members are bound to comply with the CEN/CENELEC Internal Regulations

which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.

This draft European Standard 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 CEN-CENELEC

Management Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,

Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,

Poland, Portugal, Republic of North Macedonia, Romania, Serbia, 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 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
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 17692:2021 E

worldwide for CEN national Members.
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Contents Page

European foreword ............................................................................................................................................ 4

4.1 General...................................................................................................................................................... 7

4.1.1 Pressure resistance general .............................................................................................................. 7

4.1.2 Pressure resistance of the shell ....................................................................................................... 7

4.1.3 Pressure resistance of the secondary system of the buffer tank ......................................... 7

4.1.4 Pressure resistance of the heat exchanger(s) ............................................................................ 7

4.2 Durability ................................................................................................................................................. 8

4.2.1 Durability of the shell .......................................................................................................................... 8

4.2.2 Durability of the drinking water circuit ....................................................................................... 8

4.2.3 Leak tightness ........................................................................................................................................ 8

4.2.4 Risk assessment .................................................................................................................................... 8

4.3 Technical design requirements ....................................................................................................... 8

4.3.1 Hydraulic connections ........................................................................................................................ 8

4.3.2 Venting ...................................................................................................................................................... 8

4.3.3 Draining .................................................................................................................................................... 8

4.3.4 Temperature control ........................................................................................................................... 8

4.3.5 Mounting of the insulation ................................................................................................................ 8

4.3.6 Thermal Insulation............................................................................................................................... 8

4.4 Safety devices ......................................................................................................................................... 9

4.4.1 Pressure safety valves ......................................................................................................................... 9

4.4.2 Energy shut-off device ......................................................................................................................... 9

4.4.3 Temperature safety valve .................................................................................................................. 9

4.5 Operational control .............................................................................................................................. 9

4.5.1 The temperature control.................................................................................................................... 9

4.5.2 Measures to accommodate expansion .......................................................................................... 9

4.6 Rated volume V .................................................................................................................................... 9

4.7 Effect of the materials on the drinking water quality and hygiene .................................. 10

4.8 Energy assessment ............................................................................................................................. 10

4.8.1 General.................................................................................................................................................... 10

4.8.2 Requirements on the test rig .......................................................................................................... 10

4.8.3 Measurements for the energy assessment ................................................................................ 10

5.1 General.................................................................................................................................................... 10

5.2 Initial type test ..................................................................................................................................... 11

5.2.1 General.................................................................................................................................................... 11

5.2.2 Actual storage volume V ................................................................................................................... 11

5.2.3 Drinking water volume with combined storage tanks .......................................................... 11

5.2.4 Durability test ...................................................................................................................................... 11

5.2.5 Leakage resistance ............................................................................................................................. 11

5.2.6 Leakage test .......................................................................................................................................... 12

5.2.7 Stand-by heat loss ............................................................................................................................... 13

5.2.8 Temperature control devices ......................................................................................................... 13

5.3 Testing during production .............................................................................................................. 13

5.3.1 General.................................................................................................................................................... 13

5.3.2 Pressure resistance ............................................................................................................................ 13

5.4 Internal factory production control (quality assurance system/QA system) ............... 13

7.1 General.................................................................................................................................................... 14

7.2 Installation instructions ................................................................................................................... 14

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7.3 Additional instructions ..................................................................................................................... 14

Annex A (informative) Buffer tank types .................................................................................................. 15

Annex ZA (informative) Relationship between this European Standard and the ecodesign

requirements of Commission Regulation (EU) No [814/2013] [OJ L 239, 6.9.2013]

aimed to be covered ........................................................................................................................... 17

Annex ZB (informative) Relationship between this European Standard and the energy

labelling requirements of Commission Regulation (EU) No [812/2013] [OJ L 239,

6.9.2013] aimed to be covered....................................................................................................... 18

Bibliography ....................................................................................................................................................... 19

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oSIST prEN 17692:2021
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European foreword

This document (prEN 17692:2021) has been prepared by Technical Committee CEN/TC 57 “Central

heating boilers”, the secretariat of which is held by DIN.
This document is currently submitted to the CEN Enquiry.
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1 Scope

This document specifies the essential terms, constructional requirements, tests, energy assessment and

marking of indirectly heated water storage tanks for primary water (buffer tanks), with a capacity not

exceeding 2,000 l, an operating temperature not exceeding 95 °C, and an operating pressure not

exceeding 1,0 MPa.
This document covers metallic and plastic made buffer tanks.

Although this document does not consider any buffer tanks mainly intended for direct firing, it allows for

the provision of electric heating elements for auxiliary purposes.
NOTE The energy assessment is performed by EN 15332.
2 Normative references

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements of this document. For dated references, only the edition cited applies. For

undated references, the latest edition of the referenced document (including any amendments) applies.

EN 1490, Building valves — Combined temperature and pressure relief valves — Tests and requirements

EN 12897:2016+A1:2020, Water supply — Specification for indirectly heated unvented (closed) storage

water heaters
EN 15332:2019, Heating boilers — Energy assessment of hot water storage tanks

EN 60730-2-9, Automatic electrical controls for household and similar use — Part 2-9: Particular

requirements for temperature sensing controls

EN 60335-2-102, Household and similar electrical appliances — Safety — Part 2-102: Particular

requirements for gas, oil and solid-fuel burning appliances having electrical connections

3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

— IEC Electropedia: available at https://www.electropedia.org/
— ISO Online browsing platform: available at https://www.iso.org/obp
3.1
primary water

water intended to use in central heating systems produced by any space heating appliance

3.2
buffer tank

heat store filled with primary water, in which the contents do not come into contact with the atmosphere

Note 1 to entry: It can collect energy from various sources, store it, and deliver it at a later point in time.

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3.3
combined storage tank

specific type of buffer tank used for both heating water energy storage and provisions for drinking water

heating to be achieved within a single appliance
Combined storage tanks have 3 main types of drinking water heating:
3.3.1
tank-in-tank storage

a tank-in-tank-store has a second tank for drinking water located inside the buffer tank containing the

heating water
3.3.2
storage tank with internal drinking water heat exchanger

buffer tank with an integrated heat exchanger (for example a stainless-steel, corrugated-pipe heat

exchanger) for instantaneous heating drinking water
3.3.3
storage tank with external plate heat exchanger

in this system, the drinking water is heated by an external heat exchanger working on the through-flow

principle
3.3.4
primary system
part of the system that only contains the heating medium
Note 1 to entry: See also Annex A (types of tanks) for more details.
3.3.5
secondary system
part of the system that only contains the drinking water
Note 1 to entry: See also Annex A (types of tanks) for more details.
3.4
actual storage volume V

storage volume V of the buffer tank is the total in litres of the actual volumes of the heating medium V ,

the secondary system V and the internal heat exchanger(s) V
d e
3.5
actual volume of the primary water V
volume of the heating water circuit in litres
3.6
actual volume of the drinking water circuit V
volume of the drinking water circuit in litres
3.7
actual volume of each heat exchanger V
volume of each internal heat exchanger in litres
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3.8
rated volume V
volume of the water storage shell in litres as specified on the data plate
3.9
drinking water side
parts of the buffer tank that are in direct contact with the drinking water
3.10
maximum design pressure P (rated pressure)

highest pressure to which the hot water side of the buffer tank is subjected to in pascal (Pa)

3.11
maximum operating temperature T
highest temperature for which the buffer tank is designed to operate in ° C
3.12
stand-by heat loss
energy loss from the buffer tank, when no hot water is drawn off in kWh/24 h
3.13
shell

outer vessel of the buffer tank (made, for example, of metal or plastic) on which the isolation is mounted

4 Requirements
4.1 General
4.1.1 Pressure resistance general
The following tests are performed for initial type test only.

These tests shall be performed after the manufacture of the buffer tank has been completed, but before

the insulation is applied.
4.1.2 Pressure resistance of the shell

In the test according to 5.3.2, the shell shall withstand, for at least 10 minutes, a pressure that is twice the

maximum design pressure (specified by the manufacturer) without suffering any leaks or material

damage (for example cracks).
4.1.3 Pressure resistance of the secondary system of the buffer tank

In the test according to 5.3.2, the secondary system of the buffer tank shall withstand, for at least

10 minutes, a pressure that is twice the maximum design pressure (specified by the manufacturer on the

secondary system) on secondary system without suffering any leaks or material damage (for example

cracks).
4.1.4 Pressure resistance of the heat exchanger(s)

In the test according to 5.3.2, the internal heat exchanger shall withstand, for at least 10 minutes, a

pressure that is twice the maximum design pressure of the heat exchanger(s) specified by the

manufacturer without suffering any leaks or material damage (for example cracks).

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4.2 Durability
4.2.1 Durability of the shell

When the buffer tank shell is tested according to 5.2.4, neither leaks nor material damage (for example

cracks) shall occur.
4.2.2 Durability of the drinking water circuit

When the drinking water side is tested according to 5.2.4, neither leaks nor material damage (for example

cracks) shall occur.
4.2.3 Leak tightness

For straight-tube heat exchanger the tightness of the system shall be assessed separately. This is done

using a risk assessment according to 4.2.4 in combination with one of the tests in 5.2.6.

4.2.4 Risk assessment

Risk assessment on base of the design in accordance with the relevant guidelines and, if necessary, taking

into account applicable laws (e.g. product safety law).
4.3 Technical design requirements
4.3.1 Hydraulic connections

The hydraulic connections to the heating circuit and the secondary system of the buffer tank shall be

designed so that they can be disconnected whenever necessary.
4.3.2 Venting

The heating circuit and the secondary system of the buffer tank shall be designed so that they can be

vented.
4.3.3 Draining

The buffer tank shall permit in situ draining. The method of draining shall be given in the manufacturer’s

instructions.
4.3.4 Temperature control

Temperature of the primary system shall be controlled by the temperature regulation system of the

heating appliance.
4.3.5 Mounting of the insulation

The manufacturers shall give detailed instructions and/or references in the instruction manual:

a) for the insulation of the tank if it is not insulated; or
b) the insulation can be removed for installation reasons.
4.3.6 Thermal Insulation

The insulation shall withstand the normally expected thermal and mechanical stresses, without

deformation and shall retain its insulating properties under the influences of heat and ageing.The

insulation shall be of non-combustible material. However, inflammable materials are permitted provided

that:
c) the insulation is applied to surfaces in contact with water;
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d) or the temperature of the surface to which it is applied does not exceed 85 °C in normal operation;

e) or the insulation is protected by a non-combustible case having an appropriate wall thickness.

4.4 Safety devices
4.4.1 Pressure safety valves
4.4.1.1 The pressure safety valve for the primary water part
If the pressure safety valve for the
...