Bsi bs en 15034 2006 (2009)

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Heating boilers —

Condensing heating

boilers for fuel oil

ICS 97.100.40

corrigendum September 2008

National foreword

This British Standard is the UK implementation of EN 15034:2006, incorporating corrigendum September 2008

The UK participation in its preparation was entrusted to Technical Committee RHE/10, Heating boilers

A list of organizations represented on this committee can be obtained on request to its secretary

This publication does not purport to include all the necessary provisions

of a contract Users are responsible for its correct application

Compliance with a British Standard cannot confer immunity from legal obligations.

This British Standard was

published under the authority

of the Standards Policy and

Strategy Committee on

30 November 2006

© BSI 2009

Amendments/corrigenda issued since publication

The NOTE to the Scope has been corrected

ISBN 978 0 580 64453 5

EUROPÄISCHE NORM November 2006

ICS 97.100.40

English Version Heating boilers - Condensing heating boilers for fuel oil

Chaudières de chauffage - Chaudières de chauffage à

condensation au fioul

Heizkessel - Öl-Brennwertkessel

This European Standard was approved by CEN on 22 September 2006.

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 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 European Standard 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

C O M I T É E U R O P É E N D E N O R M A L I S A T I O N

E U R O P Ä I S C H E S K O M I T E E F Ü R N O R M U N G

Management Centre: rue de Stassart, 36 B-1050 Brussels

© 2006 CEN All rights of exploitation in any form and by any means reserved

worldwide for CEN national Members.

Ref No EN 15034:2006: E

Incorporating corrigendum September 2008

Contents

Foreword 3

1 Scope 4

2 Normative references 4

3 Terms and definitions 4

4 Requirements 5

5 Test methods 7

6 Marking, labelling and packaging 11

Annex A (normative) Corrections for the determined efficiency for the low water temperature test of condensing boilers 12

Annex B (informative) Transforming results of efficiency tests to the reference point H S 13

Annex C (informative) Indirect method (checking purposes only) 14

C.1 General 14

C.2 Indirect method 14

C.2.1 Measurements 14

C.2.2 Calculations 15

Bibliography 17

Table 1 — Level of performance for energy efficiency 7

Table 2 — Calculation of part load efficiency 10

Table C.1 — Symbols and quantities needed to calculate the efficiency at part load .15

Foreword

This document (EN 15034:2006) has been prepared by Technical Committee CEN/TC 57 “Central heating boilers”, the secretariat of which is held by DIN

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 May 2007, and conflicting national standards shall be withdrawn at the latest by May 2007

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

1 Scope

This European Standard applies to oil-fired heating boilers, which are declared by the manufacturer to be condensing boilers up to a nominal heat output of 1 000 kW supplied as a unit with an atomizing oil burner which meets the requirements of EN 267

NOTE This European Standard defines three classes of oil fired boilers with efficiency requirements higher than those given for low temperature boilers in the Boiler Efficiency Directive (BED) 92/42/EEC

This European Standard completes/modifies EN 303-1, EN 303-2 and EN 304 and specifies supplementary requirements for condensing boilers

2 Normative references

The following referenced documents are indispensable for the application 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 303-1:1999, Heating boilers — Part 1: Heating boilers with forced draught burners — Terminology, general

requirements, testing and marking

EN 303-2:1998, Heating boilers — Part 2: Heating boilers with forced draught burners — Special requirements for

boilers with atomizing oil burners

EN 304:1992, Heating boilers — Test code for heating boilers for atomizing oil burners

EN 1443, Chimneys — General requirements

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

temperature sensing controls (IEC 60730-2-9:2000, modified)

3 Terms and definitions

For the purposes of this European Standard, the following terms and definitions apply

3.1

condensate

liquid formed from combustion products during the condensation process

3.2

nominal condensing output

(P)

value of useful output declared by the manufacturer, in kW and corresponding to the operation of the boiler in a

50 °C/30 °C water temperature regime

3.3

maximum allowable working temperature

temperature that the material can withstand over a long period of time

3.4

condensing boiler

boiler that, under normal operating conditions and at certain operating water temperatures, partially condenses the water vapour in the combustion products in order to make use of the latent heat of water vapour for heating purposes and also satisfy the efficiency requirements of this European standard

3.5

nominal output

(PN)

value of the useful output declared by the manufacturer, in kW and corresponding to the operation of the boiler in a

80 °C/60 °C water temperature regime

4 Requirements

4.1 Construction requirements

4.1.1 General

In addition to EN 303-1:1999, clause 4.1, the following requirements shall apply

4.1.2 Materials in contact with condensate

All parts of the heating boiler likely to come into contact with condensation shall be constructed of sufficiently corrosion resistant materials or materials protected by a suitable coating, in order to ensure a reasonable life for a boiler that is installed, used and maintained in accordance with the manufacturer's instructions Fuel quality requirements shall be declared by the manufacturer

4.1.3 Removal of condensation

Condensation produced during boiler operation, including condensation formed in the flue and its connecting pipes, which shall be removed by means of a discharge pipe (or pipes)

The internal diameter of the outside connection of the condensation discharge system shall be at least 13 mm The disposal system, forming part of the boiler or supplied with the boiler, shall be such that:

 it can be easily inspected and cleaned in accordance with the manufacturer's instructions;

 it cannot transmit combustion products into the room where the boiler is installed; this requirement is satisfied if the disposal system incorporates a water trap;

flue length specified by the manufacturer

Surfaces in contact with condensates (except purpose provided drains, water traps and siphons) shall be designed

to prevent condensation retention

4.1.4 Control of the combustion products temperature

If the combustion products circuit contains materials that are likely to be affected by heat or is intended to be connected to a flue (including seals) that is likely to be affected by heat from the combustion products, the boiler shall incorporate a device to prevent the combustion products temperature exceeding the maximum allowable working temperature for the material as declared by the manufacturer

The device for limiting the combustion products temperature shall be a safety temperature cut off The safety temperature limiter shall comply with the requirements of EN 60730-2-9 for type 2 devices

The device for limiting the combustion products temperature may be omitted if the combustion products temperature in no case is higher than the allowable temperature of the materials used in the combustion products circuit

If the flue gas system is not supplied with the appliance, the device for limiting the combustion products temperature may be supplied as an option to be fitted by the installer Mounting the device shall be well defined

4.1.5 Chemical composition of the condensate

If the manufacturer states the chemical composition of the condensate it shall be checked at the end of the test of 5.3

4.2 Operational requirements

4.2.1 General

In addition to EN 303-2:1998, clause 3, the following requirements shall apply

4.2.2 Verification of the nominal condensing output

If the manufacturer states the nominal condensing output it is verified under the test conditions of 5.2

4.2.3 Formation of condensation

When the boiler operates under the conditions of 5.3, condensation shall only form at the points intended for this purpose and shall be readily drained

Condensation shall not find its way into parts of the boiler which are not intended to have formation, collection and discharge of condensation, nor may the condensation cause any nuisance to the operation, the boiler and the surroundings

4.2.4 Temperature of combustion products

Under the conditions of 5.4 the temperature of the combustion products shall not exceed the maximum allowable working temperature for the materials of the combustion circuit and the flue materials, specified by the boiler manufacturer

Operation of the safety temperature cut off according to 4.1.4 shall cause a non-volatile lock-out of the boiler

4.3 Heating requirements

4.3.1 Normal conditions

The combustion requirements are those specified in EN 303-2 and EN 304 The test shall also be carried out when the boiler is operating in the condensing mode (50 °C/30 °C)

4.3.2 Special conditions

The condensation discharge blockage test, as described in 5.5.2, shall be performed unless the manufacturer fixes

a warning note on the boiler that the condensation discharge has to be checked and cleaned once a year In the maintenance manual the inspection and cleaning has to be described in detail

4.4 Efficiencies requirements

4.4.1 Useful efficiency at full load

Under the test conditions specified in 5.6.1, the useful efficiency at the nominal heat input, shall be at least:

N

P

lg

N

P

lg 5

,

1

5

,

where

PN is the nominal output

NOTE These formulae are applicable up to 1 000 kW

4.4.2 Useful efficiency at part load

Under the test conditions specified in 5.6.2, the useful efficiency at 30 % of the nominal heat input, shall be at least:

Table 1 — Level of performance for energy efficiency Level of

performance

a

I 99 + lg (PN) < ηA Condensing average return temperature: (30 ± 0,5) °C

II 94 + lg (PN) < ηB < 99 + lg (PN) Condensing average return temperature: (30 ± 0,5) °C III 87,5 + 1,5 lg (PN) < ηC < 94 + lg (PN) — mean boiler water temperature 40°C

where

ηA is the efficiency for level I;

ηB is the efficiency for level II;

ηC is the efficiency for level III

NOTE These formulae are applicable up to 1 000 kW

a Test methods for level III are necessary to fulfil the requirements of the boiler efficiency directive up to 400 KW, test methods for level I and level II are optional

5 Test methods

5.1 General

All the tests are carried out under the conditions laid down in boiler standards EN 303-2 and EN 304, unless otherwise stated

If the actual test conditions differ from the reference conditions (20 °C, 70 % relative humidity, 1 013,25 mbar) and/or the return water temperature differs from the specified value, the correction formulae given in Annex A are used to correct the determined useful efficiency for the tests outlined in 5.2 and 5.6.2

5.2 Verification of the nominal condensing output

The water rate is adjusted so as to obtain a return water temperature of (30 ± 0,5) °C and a temperature difference between flow and return temperature of (20 ± 2) °C

5.3 Formation of condensation

The boiler shall operate continuously for 4 h under the test conditions of 5.2

It shall be verified that the requirement of 4.2 3 is fulfilled

5.4 Temperature of combustion products

The boiler shall be installed as specified in the general test conditions of boiler standards EN 303-2 and EN 304 The boiler thermostat shall be put out of operation Where fitted, the control to limit the temperature of combustion products remains in operation

The temperature of the combustion products shall be progressively raised, either by increasing the fuel rate or by another means which increases the temperature (e.g removal of baffles) as specified by the manufacturer It shall

be verified that the requirement of 4.2.4 is fulfilled

5.5 Combustion

5.5.1 Normal conditions

Combustion characteristics shall be verified in accordance with the boiler standards under two water temperature regimes: 80 °C/60 °C and 50 °C/30 °C

5.5.2 Special conditions

The boiler is operated continuously under the test conditions of 5.2 With the condensation drain blocked or with a built-in pump for discharging condensation placed out of operation, the concentration of CO in the combustion products shall not exceed 0,2 % corrected (or air free basis) until shut-down or lock-out occurs

5.6 Efficiencies

5.6.1 Useful efficiency

The efficiency shall be determined at the nominal heat input for boilers The water rate shall be adjusted to obtain a return water temperature of (60 ± 1) °C and a temperature difference between the flow and return water temperature of (20 ± 2) °C

The efficiency shall be determined as stated in boiler standards

It shall be checked that the determined efficiencies are no less than the requirements of 4.4.1

5.6.2 Useful efficiency at part load

5.6.2.1 General

The useful efficiency at part load shall be determined at 30 % of the nominal heat input for boilers Level I and Level II The useful efficiency at part load shall be determined under the test conditions of the boiler standards with

a constant return water temperature of (30 ± 0,5) °C

It shall be checked that the requirements of 4.4.2 are met

Level III: Throughout the test, the water volume rate shall be constantly maintained within ± 1 %, taking into account temperature variations, and that the pump operates continuously

5.6.2.2 Operating mode No 1

The average boiler return temperature over a complete cycle shall be held at (37 ± 1) °C, with a maximum variation in this temperature during the measurement period of ± 1 K

A timer shall be connected to the terminals of the room thermostat so as to obtain a complete operating cycle of

10 min

Shutdown and operating times shall be calculated as indicated in Table 2

The temperatures shall be continuously and directly measured on the flow and return of the boiler

The boiler shall be considered in thermal equilibrium when the efficiency measurement of three consecutive cycles, combining any two results from three, does not vary by more than 0,5 % In this case, the result shall be equal to the average value of at least three consecutive measuring cycles For any other case, the average value shall be calculated from at least ten consecutive cycles