Electric clothes washer-dryers for household use - Methods of measuring the performance

This European Standard specifies the test methods that has to be applied in accordance with the
Commission Directive 96/60/EC of 19 September 1996 implementing Council Directive 92/75/EEC
with regard to energy labelling of household combined washer-driers.
It deals with
– performance criteria for the complete operation cycle of a 60 °C cotton wash programme as
specified in EN 60456:2011 and a drying cycle based on the “Dry cotton programme“ as
specified in EN 61121:2013,
– tolerances for the verification procedure.
This European Standard is concerned neither with safety nor with performance requirements.
NOTE Washer-dryers for communal use in blocks of flats or in launderettes are within the scope of this
standard, but machines for commercial laundries are not included.

Elektrische Wasch-Trockner für den Hausgebrauch - Prüfverfahren zur Bestimmung der Gebrauchseigenschaften

Lavantes-séchantes électriques à usage domestique - Méthodes de mesure de l'aptitude à la fonction

Električni pralno-sušilni stroji za uporabo v gospodinjstvu - Metode za merjenje lastnosti

Ta evropski standard določa preskusne metode, ki jih je treba uporabiti v skladu z Direktivo Evropske komisije 96/60/ES z dne 19. septembra 1996 o izvajanju Direktive Sveta 92/75/EGS
o energijskem označevanju gospodinjskih kombiniranih pralno-sušilnih strojev.
Obravnava:
– merila zmogljivosti za celoten delovni cikel programa pranja bombažnega perila pri 60 °C, kot je opredeljeno v standardu EN 60456:2011, in cikel sušenja na podlagi »programa sušenja bombažnega perila«, kot je opredeljeno v standardu EN 61121:2013;
– dovoljena odstopanja za postopek preverjanja.
Ta evropski standard ne opredeljuje varnostnih zahtev niti zahtev glede zmogljivosti. OPOMBA: Področje uporabe tega standarda vključuje pralno-sušilne stroje za javno uporabo v stanovanjskih naseljih ali samopostrežnih pralnicah, ne pa tudi strojev za uporabo v komercialnih pralnicah.

General Information

Status
Published
Public Enquiry End Date
31-Aug-2014
Publication Date
09-Nov-2015
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
05-Nov-2015
Due Date
10-Jan-2016
Completion Date
10-Nov-2015

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SLOVENSKI STANDARD
SIST EN 50229:2015
01-december-2015
1DGRPHãþD
SIST EN 50229:2008
(OHNWULþQLSUDOQRVXãLOQLVWURML]DXSRUDERYJRVSRGLQMVWYX0HWRGH]DPHUMHQMH
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Electric clothes washer-dryers for household use - Methods of measuring the
performance

Elektrische Wasch-Trockner für den Hausgebrauch - Prüfverfahren zur Bestimmung der

Gebrauchseigenschaften

Lavantes-séchantes électriques à usage domestique - Méthodes de mesure de l'aptitude

à la fonction
Ta slovenski standard je istoveten z: EN 50229:2015
ICS:
97.060 Aparati za nego perila Laundry appliances
SIST EN 50229:2015 en,fr

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

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SIST EN 50229:2015
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SIST EN 50229:2015
EUROPEAN STANDARD EN 50229
NORME EUROPÉENNE
EUROPÄISCHE NORM
October 2015
ICS 97.060 Supersedes EN 50229:2007
English Version
Electric clothes washer-dryers for household use - Methods of
measuring the performance

Lavantes-séchantes électriques à usage domestique - Elektrische Wasch-Trockner für den Hausgebrauch -

Méthodes de mesure de l'aptitude à la fonction Prüfverfahren zur Bestimmung der
Gebrauchseigenschaften

This European Standard was approved by CENELEC on 2015-06-30. CENELEC 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 CEN-CENELEC

Management Centre or to any CENELEC 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 CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the

same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,

Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,

Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland,

Turkey and the United Kingdom.
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels

© 2015 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.

Ref. No. EN 50229:2015 E
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SIST EN 50229:2015
EN 50229:2015 (E) - 2 -
Contents
Page

European foreword ..............................................................................................................................- 3 -

1 Scope ..........................................................................................................................................- 4 -

2 Normative references ..................................................................................................................- 4 -

3 Terms, definitions and symbols ...................................................................................................- 5 -

4 Requirements ..............................................................................................................................- 7 -

5 Test conditions, materials and instrumentation ...........................................................................- 8 -

6 Preparation for testing .................................................................................................................- 9 -

7 Performance measurement – General requirements ............................................................... - 10 -

8 Tests for performance .............................................................................................................. - 11 -

9 Assessment of performance ..................................................................................................... - 18 -

10 Tolerances and control procedures to be used for verification purposes ................................ - 29 -

11 Data to be reported .................................................................................................................. - 30 -

Annex A (normative) ........................................................................................................................ - 31 -

Splitting the base load ...................................................................................................................... - 31 -

Annex B (normative) Test report – data to be reported .................................................................. - 34 -

Bibliography ..................................................................................................................................... - 40 -

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SIST EN 50229:2015
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European foreword

This document (EN 50229:2015) has been prepared by CLC/TC 59X "Performance of household and

similar electrical appliances".
The following dates are fixed:
• latest date by which this document has to be (dop) 2016-06-30
implemented at national level by publication of
an identical national standard or by
endorsement
(dow) 2018-06-30
• latest date by which the national standards
conflicting with this document have to
be withdrawn
This document supersedes EN 50229:2007.
The major technical modifications compared to EN 50229:2007 are:
a) The structure has been revised to assure a better readability.
b) All references concerning EN 60456:2011 and EN 61121:2013 have been updated.
c) Precise instruction to determine the load capacity for drying.

d) Precise instruction of composition of partial loads – Splitting the base load.

e) Revision of ‘Test report – data to be reported’ tables.

Introduction of method for additional drying.Attention is drawn to the possibility that some of the

elements of this document may be the subject of patent rights. CENELEC [and/or CEN] shall not be

held responsible for identifying any or all such patent rights.
This document has been prepared under a mandate given to CENELEC by the European
Commission and the European Free Trade Association.
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1 Scope

This European Standard specifies the test methods that has to be applied in accordance with the

Commission Directive 96/60/EC of 19 September 1996 implementing Council Directive 92/75/EEC

with regard to energy labelling of household combined washer-driers.
It deals with

– performance criteria for the complete operation cycle of a 60 °C cotton wash programme as

specified in EN 60456:2011 and a drying cycle based on the “Dry cotton programme“ as

specified in EN 61121:2013,
– tolerances for the verification procedure.

This European Standard is concerned neither with safety nor with performance requirements.

NOTE Washer-dryers for communal use in blocks of flats or in launderettes are within the scope of this

standard, but machines for commercial laundries are not included.
2 Normative references

The following documents, in whole or in part, are normatively referenced in this document and are

indispensable for its application. For dated references, only the edition cited applies. For undated

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

EN 60335-2-7 Household and similar electrical appliances - Safety - Part 2-7: Particular

requirements for washing machines (IEC 60335-2-7)
Household and similar electrical appliances - Safety - Part 2-11: Particular
EN 60335-2-11 2010
requirements for tumble dryers (IEC 60335-2-11:2008)

EN 60456 2011 Clothes washing machines for household use – Methods for measuring the

performance (IEC 60456:2010)
EN 60704-3 Household and similar electrical appliances – Test code for the
determination of airborne acoustical noise –
Part 3: Procedure for determining and verifying declared noise emission
values (IEC 60704-3)
EN 60734 Household electrical appliances - Performance - Water for testing (IEC
60734)
Tumble dryers for household use – Methods for measuring the
EN 61121 2013
performance (IEC 61121:2012, modified)
Quantities and units - Part 1: General (ISO 80000-1:2009 + Cor 1:2011)
EN ISO 80000-1 2013
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3 Terms, definitions and symbols
3.1 Terms and definitions

For the purposes of this document, the terms and definitions given in 3.1 of EN 60456:2011, except

for 3.1.15, 3.1.22, 3.1.25, 3.1.Z1 – 3.1.Z12, together with the following apply.
3.1.1
washer-dryer

washing machine which includes both a spin extraction function and also a means for drying the

textiles, usually by heating and tumbling
3.1.2
rated washing capacity

maximum mass in kg of dry textiles which the manufacturer declares can be washed in the washer-

dryer
3.1.3
rated drying capacity

maximum mass in kg of dry textiles which the manufacturer declares can be dried in the washer-

dryer
3.1.4
complete operation cycle

complete washing and drying process, as defined by the required programmes, consisting of a

washing cycle and a drying cycle set
3.1.5
washing cycle

complete washing process, as defined by the required programme, consisting of a series of different

operations (wash, rinse, spin)
3.1.6
drying cycle

complete drying process, as defined by the required programme, consisting of a series of different

operations (heat, spin, cool down)
3.1.7
drying cycle set

set of drying cycles in which a rated drying load and a residual drying load are dried

Note 1 to entry: Usually a drying cycle set consists of two or more drying cycles involving the rated drying

load and the residual drying load but when a washer-dryer has a rated drying capacity equal to its rated

washing capacity the term drying cycle set applies to the cycle in which the rated drying load is dried.

3.1.8
automatic drying

drying process which automatically switches off when a certain moisture content of the load is

reached
3.1.9
partial load
part of the test load used during a single drying cycle

Note 1 to entry: Usually the rated drying capacity of a washer-dryer is smaller than its rated washing

capacity. In this case, for a complete operating cycle the test load for washing has to be divided into partial

loads to perform the drying tests.

Note 2 to entry: Partial load is a general term that means either rated drying load or residual drying load.

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EN 50229:2015 (E) - 6 -

Note 3 to entry: If, for a particular washer-dryer the rated drying capacity is equal to the rated washing

capacity, the term partial load means the entire base load.
3.1.10
rated drying load

part of the base load having a mass after conditioning equal to the rated drying capacity of the

washer-dryer except for the case where the rated drying capacity is equal to the rated washing

capacity in which case the rated drying load shall have the same mass as the base load

Note 1 to entry: Under circumstances where the rated drying capacity is less than half the rated washing

capacity, more than one rated drying load will need to be prepared from the base load.

3.1.11
residual drying load
remaining part of the base load after the rated drying load(s) has been removed

Note 1 to entry: If, for a particular washer-dryer the rated drying capacity is equal to the rated washing

capacity, there will be no residual drying load.
3.1.12
final moisture content
moisture content of a test load at the end of a drying cycle
3.1.13
additional drying

supplementary drying of the test load applied when the selected drying programme fails to achieve a

final moisture content of 3,0 % or less
3.2 Symbols
The symbols used in this standard are listed in Table 1.

NOTE The symbols in 3.2 of EN 60456:2011 and 3.2 of EN 61121:2013 do not apply to this European

Standard.
Table 1 – List of symbols
Symbol Unit Definition
L l Water consumption
kWh Energy consumption
t min Programme duration
T °C Temperature
g Mass of load
µ % Moisture content
S rpm Maximum spin speed
K kg Rated capacity
X % Reflectance value
n - Number of test strips in a test run
s - Standard deviation
C - Sum of average reflectance for each soil for a single test run
- Number of soil types per stain test strip
̅𝐶 - Sum of average reflectance for all soils for all test runs
B - Number of test runs in a test series
Ratio of sum of reflectance for the test washing machine against the sum of the
Q -
reflectance for the reference machine.
P - Confidence interval
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SIST EN 50229:2015
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F - Student T factor t
w-1, 0,05
W - Number of degrees of freedom in the Student T factor
Index Definition
w Washing cycle
d Drying cycle
Complete operation cycle
i Initial value
f Final value
0 Conditioned
N Nominal value for partial load amounts and target final moisture
p partial load
m Measured value
result of additional drying program runs required to reach final moisture target
Add
s specific value calculated by division with the rated washing capacity
a Soil type
j Test strip
k Test run
t Machine on test
r Reference machine
c Cold water
h Hot water
M Main wash
Superscripts Definition
Average value for a test series (mean value).
(Bar)
4 Requirements
4.1 General

This document describes test methods for the measurement of the following performance parameters:

• Washing performance;
• Water extraction performance;
• Water consumption for washing;
• Water consumption for drying;
• Energy consumption for washing;
• Energy consumption for drying;
• Programme time for washing;
• Programme time for drying;
• Maximum spin speed.

NOTE While this document describes the general procedure for the measurement of these parameters, much of the

necessary and specific detail is contained in EN 60456:2011 and EN 61121:2013.

Any claims of performance referring to this document for these parameters shall be measured in

accordance with the requirements of this document (refer to Clause 7 for details).

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4.2 Rated capacity

The rated washing capacity shall be declared by the manufacturer or supplier as the maximum

mass of cotton textiles, to be washed in the cotton programme, at 0,5 kg intervals given in any user

information.

The rated washing capacity for any textile type shall not exceed the maximum mass of dry laundry,

in kilograms, to be used in the washer-dryer in accordance with EN 60335-2-7.

If the rated washing capacity is not declared, it shall be deduced from the volume of the drum

according to EN 60456:2011, N.2.

The rated drying capacity shall be declared by the manufacturer or supplier as the maximum mass

of cotton textiles, to be dried in either a drying only cycle or a combined washing and drying cycle

without interruption, whichever is higher, at 0,5 kg intervals given in any user information.

The rated drying capacity for any textile type shall not exceed the maximum mass of dry laundry, in

kilograms, to be used in the washer-dryer in accordance with 3.1.9 of EN 60335-2-11:2010.

If the rated drying capacity is not declared, it shall be deduced from the volume of the drum

according to EN 61121:2013, Annex E.
4.3 Dimensions
See 4.3 of EN 60456:2011.
5 Test conditions, materials and instrumentation
5.1 General

The tolerances specified for parameters within this document (using the symbol “±”) indicate the

allowable limits of variation from the specified parameter outside which the test or results shall be

invalid. The statement of tolerance does not permit the deliberate variation of these specified

parameters.

Unless otherwise specified, the reference machine shall be considered a test washing machine

with respect to conditions, materials and equipment specified.
5.2 Ambient conditions
5.2.1 Electricity supply
Supply voltage and frequency shall be in accordance with EN 60456:2011, 5.2.1.
5.2.2 Water supply
5.2.2.1 General

The measured total water hardness, water temperature and water pressure of water supplied to

washer-dryers shall comply with the following requirements and shall be reported. This water is

generally referred to as laboratory supply water in this document.
5.2.2.2 Water hardness

For all treatments of the test load prior to a test series and all test runs in accordance with this

document, water having a total water hardness of (2,5 ± 0,2) mmol/l shall be used.

Normalization of a base load prior to use in a test series (refer to EN 60456:2011, 6.4.4) shall

always be done using laboratory supply water with the same total water hardness as that used for the

subsequent test series.
Total water hardness is determined and expressed in mmol/l of CaCO3 equivalent.
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If total water hardness needs to be adjusted, it shall be prepared according to EN 60734.

Measurements of total water hardness shall be undertaken on water that is representative of the

laboratory supply water used for tests.
5.2.2.3 Water temperature and water pressure

Water temperature and water pressure shall meet the requirements given in EN 60456:2011, 5.2.2.3

and 5.2.2.4.
5.2.3 Ambient temperature and humidity

The ambient temperature and ambient humidity shall be in accordance with 5.2.3 in EN 61121:2013.

5.3 Test materials

The specifications for base loads, stain test strips and detergent used for testing washer-dryers shall

be in accordance with 5.3 of EN 60456:2011.
5.4 Equipment

The specification for the reference machine is given in 5.4.2 of EN 60456:2011. Only the type 1

reference machine according to EN 60456:2011, Annex D shall be used.

Specifications for other specialized test equipment required for washer-dryer testing to this

document, including the spectrophotometer, equipment for conditioning the base load and the iron

shall be in accordance with 5.4.3, 5.4.4 and 5.4.6 of EN 60456:2011 and in accordance with 5.5 of

EN 61121:2013. Where these two standards give different values, the smaller value shall apply.

A checklist of other laboratory equipment which may be required for washer-dryer testing is provided

in 5.4.8 of EN 60456:2011.
5.5 Instrumentation and accuracy

Instruments used and measurements made according to this document shall comply with the

specifications given in 5.5.2 and 5.5.3 of EN 60456:2011 and EN 61121:2013, 5.5, whichever is more

precise.
6 Preparation for testing

The washer-dryer shall be at laboratory ambient temperature at the beginning of each complete

operation cycle. It shall be accepted that this requirement has been met if the washer-dryer has

been left open and standing at the stable laboratory ambient temperature for not less than 10 h.

Prepare the washer-dryer for testing according to EN 60456:2011, 6.2.1 and 6.3 and 6.4 of

EN 61121:2013.
Prepare the reference machine for testing according to EN 60456:2011, 6.2.2.

Prepare and place the detergent for the washer-dryer and the reference machine according to

EN 60456:2011, 6.3.

Prepare cotton test loads for the washer-dryer and reference machine according to EN 60456:2011,

6.4.

If the rated washing capacity of the washer-dryer is greater than its rated drying capacity, it will

be necessary after the washing performance test to divide the base load into two or more parts: the

rated drying load(s) and the residual drying load. To enable this separation to be made in a timely

manner, mark or otherwise identify the items in the base load that will be used to make up the rated

drying load(s). The compositions of rated drying loads shall be as described in EN 61121:2013,

6.5.6.1. If the base load does not contain all the items needed for the rated drying load, use the

alternative compositions as described in Annex A.
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EN 50229:2015 (E) - 10 -

If the rated drying capacity of the washer-dryer is equal to its rated washing capacity, the base

load will not need to be split after the washing performance test; the whole base load shall be dried in

a single drying cycle.

NOTE It is recognised that in this special case, the base load will be slightly smaller than the rated drying capacity.

Determine the mass of the rated drying load and the residual drying load by conditioning according

to EN 61121:2013, 6.5.5.
7 Performance measurement – General requirements
7.1 Outline

This section sets out the main performance test methods specified in this document.

The general approach to the test procedure is as follows:
• the washer-dryer on test is used to wash and dry a test load five times;
• the reference machine is operated in parallel;

• after each washing cycle, the soiled test strips are removed and the base load is weighed and

divided into partial loads consisting of one or more rated drying loads and a residual

drying load if applicable;
• each of the partial loads is dried in turn;

• washing performance is evaluated from the reflectance of the soiled test strips;

• water extraction performance is determined by measuring the mass of the base load after

conditioning and the mass of the base load after each wash;

• water consumption, energy consumption, programme time and maximum spin speed are

determined by monitoring these parameters continuously throughout the whole washing and

drying sequence.
The evaluation of these measured parameters is specified in Clause 9.
7.2 Key test requirements
When performing a test series, the following key test requirements shall be met:
• the load type shall be cotton;
• all performance parameters listed in 7.1 shall be measured together;

• the programme to be tested for washing performance shall be the 60 °C cotton programme

without prewash as identified by the manufacturer of the washer-dryer;

• the reference programme on the reference machine shall be ‘60 °C cotton EN 60456’;

• the drying programme to be tested shall be one automatic setting identified by the

manufacturer of the washer-dryer for drying cotton loads. If the washer-dryer does not have

an automatic drying programme appropriate drying times shall be selected;
• the target final moisture content for all drying tests shall be (0,0 ± 3,0) %;

• the requirement given in EN 61121:2013, Table 6 for the average final moisture content for

the test series shall be disregarded;

• the test load mass for washing performance tests shall be equivalent to the rated washing

capacity of the washer-dryer;

• the test load for the drying test shall be the base load used for the washing performance test.

If the rated drying capacity is smaller than the rated washing capacity, the test load shall

be divided for drying tests according to Clause 6.
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8 Tests for performance
8.1 General

This section sets out the test procedure for the determination of the parameters listed in 4.1 for a

cotton load.

For the assessment of washing performance the result from the washer-dryer is compared to the

result from the reference machine which is operated in parallel.

While the text in this document is written from the perspective of a single washer-dryer operating in

parallel with the reference machine, more than one washer-dryer may be operated in parallel with

the reference machine during a test run or test series.
8.2 Test procedure for performance tests
8.2.1 Test conditions, materials and preparation for testing

For each test run the reference machine and washer-dryer shall be set up as follows:

• connected to an electricity supply specified in 5.2;
• connected to a laboratory water supply system specified in 5.2;
• operated in ambient conditions as specified in 5.2;

• with the washer-dryer and the reference machine prepared in accordance with Clause 6

using a cotton base load specified in 5.3 and a test load prepared in accordance with the

requirements of Clause 6;

• using the detergent specified in 5.3 and with the detergent dose and placement specified in

Clause 6.

Stain test strips and detergent (as applicable) used in the washer-dryer and the reference machine

shall be from the same batch for all test runs within a test series.
8.2.2 Test load and loading

EN 60456:2011, 8.2.2 shall be followed, omitting any paragraphs that refer to Annex ZA.

8.2.3 Programme selection
8.2.3.1 General

Select a programme for the washing cycle according to 8.2.3.2 and a programme for the drying

cycle according to 8.2.3.3.

The selected programmes shall be separate entities. Continuous programmes that wash and dry

without interruption are not suitable for tests according to this standard.
8.2.3.2 Washing programme selection
Select a washing programme in accordance with EN 60456:2011, 8.2.3.
8.2.3.3 Drying programme selection

If the washer-dryer offers any automatic drying programme, the programme selected shall be an

automatic drying programme.

The automatic drying programme selected on the washer-dryer and any associated settings shall

initially be in accordance with the manufacturer’s instructions.
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In the absence of any instructions from the manufacturer, a suitable automatic programme shall be

established by trial and error using a rated drying load before a full test series is carried out. An

automatic programme setting shall be selected which aims to achieve final moisture content values

that are as close as possible to the range -3 % to +3 %.

The same automatic drying programme shall be used for drying both the rated drying load(s) and

the residual drying load.

The selected automatic drying programme settings from the first complete operating cycle shall

be used for all complete operating cycles in a test series except where applicable in 8.2.4.4.

For washer-dryers without automatic drying, the duration of the drying shall be set using the timer

of the washer-dryer, if available, otherwise a separate timer shall be used.

The drying time selected on the washer-dryer and any associated settings shall initially be in

accordance with the manufacturer’s instructions.

In the absence of any instructions from the manufacturer, a suitable drying time shall be established

by trial and error before a full test series is carried out. A drying time setting shall be selected which

aims to achieve final moisture content values that are as close as possible to the range -3 % to +3 %

but no greater than +3 %.

The timer setting for tests with the rated drying load may be different to the timer setting for tests

with the residual drying load.

The drying programme selected on the washer-dryer (with any associated settings) shall be

reported.
8.2.4 Test procedure
8.2.4.1 General

This procedure is intended to be carried out in one continuous sequence so that the washing

procedure is followed immediately by the drying procedure.

Washing performance, water extraction performance, water consumption, energy consumption,

programme time and spin speed shall be measured in the same complete operating cycle.

8.2.4.2 Washing test procedure

Operate the washer-dryer and the reference machine in parallel on the relevant programmes

ensuring that no user selected delay is incorporated. Monitor and record all required parameters

during the programme.

NOTE The intent of “parallel” is to ensure that washer-dryers are subjected to comparable variations in normal

laboratory conditions as the reference machine.

Any adverse warning indicators (eg. warnings or faults) shall be noted and considered when

assessing test run validity.

Within 10 min of the completion of the washing cycle, remove the test load and carefully separate

the stain test strips from the load as quickly as possible.
Record the mass of the whole base load.

Follow the relevant requirements of each of the performance tests being carried out in the test series

as described in 8.3, 8.4, 8.5 and 8.6.

Dry the reference machine base load in a tumble dryer to a moisture content of (0 ± 3) %.

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8.2.4.3 Drying test procedure
Carry out the following procedures on the washer-dryer only.

Divide the base load into partial loads consisting of one or more rated drying load(s) and one

residual drying load if applicable, according to the identifying marks on the load items prepared

according to Clause 6. Record the mass of each partial load.

If the rated drying capacity of the washer-dryer is equal to its rated washing capacity the base

load shall not be divided; it shall be dried in one single drying cycle.

Calculate the initial moisture content of each partial load according to the following formula:

W −W
ip 0 p
µ = ×100
...

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