SIST EN 61121:2013

SLOVENSKI STANDARD
01-april-2013
Gospodinjski sušilni stroji - Metode za merjenje funkcionalnosti (IEC 61121:2012,
spremenjen)
Tumble dryers for household use - Methods for measuring the performance (IEC
61121:2012, modified)
Wäschetrockner für den Hausgebrauch - Verfahren zur Messung der
Gebrauchseigenschaften (IEC 61121:2012, modifiziert)
Sèche-linge à tambour à usage domestique - Méthodes de mesure de l'aptitude à la
fonction (CEI 61121:2012, modifiée)
Ta slovenski standard je istoveten z: EN 61121:2013
ICS:
97.060 Aparati za nego perila Laundry appliances
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 61121
NORME EUROPÉENNE
February 2013
EUROPÄISCHE NORM
ICS 97.060 Supersedes EN 61121:2005

English version
Tumble dryers for household use -
Methods for measuring the performance
(IEC 61121:2012, modified)
Sèche-linge à tambour à usage Wäschetrockner für den Hausgebrauch -
domestique - Verfahren zur Messung der
Méthodes de mesure de l'aptitude à la Gebrauchseigenschaften
fonction (IEC 61121:2012, modifiziert)
(CEI 61121:2012, modifiée)
This European Standard was approved by CENELEC on 2012-12-31. 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.

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

Management Centre: Avenue Marnix 17, B - 1000 Brussels

© 2013 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 61121:2013 E
Foreword
This document (EN 61121:2013) consists of the text of IEC 61121:2012 prepared by IEC/SC 59D "Home
laundry appliances" of IEC/TC 59 "Performance of household and similar electrical appliances", together with
the common modifications prepared by CLC/TC 59X "Performance of household and similar electrical
appliances".
The following dates are fixed:
(dop) 2013-12-31
• latest date by which this document has to be implemented
at national level by publication of an identical
national standard or by endorsement
(dow) 2015-12-31
• latest date by which the national standards conflicting
with this document have to be withdrawn

This document supersedes EN 61121:2005.
a) a test procedure for a combined test sequence of full and partial load was introduced;
b) a test procedure for measuring power consumption in low power modes is introduced;
c) a formula to calculate the energy consumption of tumble dryers including low power modes was added;
d) control procedures for checking measured values in comparison to values declared by the manufacturer
under consideration of permitted tolerances are updated.
Clauses, subclauses, notes, tables and figures which are additional to those in IEC 61121:2012 are
prefixed “Z”.
Words in bold in the text are defined in Clause 3.
This document has been prepared under a mandate given to CENELEC by the European Commission and
the European Free Trade Association, and supports essential requirements of EU Directive(s).
This European Standard specifies, as far as necessary, the test methods which shall be applied in
accordance with the COMMISSION DELEGATED REGULATION (EU) No 392/2012 implementing Directive
2010/30/EU the European Parliament and of the Council with regard to energy labelling of household tumble
dryers and in accordance with the COMMISSION REGULATION (EU) No 932/2012 implementing Directive
2009/125/EC of the European Parliament and of the Council with regard to ecodesign requirements for
household tumble dryers.
The procedures described in this European Standard were modified substantially compared to the previous
version, e.g. with regard to partial load. Therefore, results of tests according to this standard cannot and
shall not be directly compared to results of similar procedures of previous versions. In addition, results based
on a specific reference programme shall not be compared to results based on other reference programs.
Annex ZA sets out the procedure to be applied for testing according to Commission Regulations with regard
to energy labelling and ecodesign and provides all necessary links to all relevant clauses of this European
Standard.
– 3 – EN 61121:2013
Annex ZB provides control procedures for checking measured values in comparison to values declared by
the manufacturer under consideration of permitted tolerances.
Annex ZC lists normative references.

Endorsement notice
The text of the International Standard IEC 61121:2012 was approved by CENELEC as a European Standard
with agreed common modifications
COMMON MODIFICATIONS
1 Scope
Add the following note:
NOTE Z1 The methods of measuring the performance of tumble dryers which use gas as a heating
source are covered by EN 1458-2.
2 Normative references
Add the following references:
EN 60704-1, Household and similar electrical appliances – Test code for the determination of airborne
noise — Part 1: General requirements (IEC 60704-1)
EN 60704-2-6, Household and similar electrical appliances – Test code for the determination of airborne
acoustical noise – Part 2-6: Particular requirements for tumble dryers (IEC 60704-2-6)
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)
3 Terms, definitions and symbols
3.1 Terms and definitions
Replace definition 3.1.4 by the following
3.1.4
automatic tumble dryer
tumble dryer which has at least one programme which switches off the drying process when a certain
moisture content of the load is reached
Note 1 to entry: This may include systems that use conductivity or temperature sensing.
Add the following definitions:
3.1.Z1
full load
rated capacity for cotton textiles
3.1.Z2
partial load
half of the rated capacity for cotton textiles
NOTE See Annex ZA for additional requirements.

– 5 – EN 61121:2013
3.1.Z3
treatment
combination of test load and programme to be used for a test run within a combined test series as defined
in Annex ZA
3.1.Z4
treatment full
test run using cotton dry programme with full load
3.1.Z5
treatment half
test run using cotton dry programme with partial load
3.1.Z6
unstable left on mode
condition persisting after completion of the programme and unloading of the machine and where the power
consumption may change without any intervention by the end-user
3.1.Z7
post programme phases
phases after the end of programme defined to be used for the measurement of left on mode
3.1.Z8
post programme phase LU
phase after the end of programme defined to be used for the measurement of the unstable left on mode
3.1.Z9
post programme phase LO
phase after the end of programme defined to be used for the measurement of the left on mode
3.1.Z10
left on mode duration
time to revert automatically the machine to ‘off-mode’ after the end of the programme if the tumble dryer is
equipped with a power management system
3.1.Z11
power management system
system within the test tumble dryer which reverts it automatically to off mode
3.1.Z12
frequency of cleaning
number of cycles after which the heat exchanger or filters shall be cleaned
3.2 Symbols
st
Replace the 1 paragraph by:
The symbols are listed in Table 1 and Table Z1.

Add the following new table after Table 1:
Table Z1 – Symbols relating to Annex ZA
Symbol Units Definition
rounding up/down to full integer values (no decimal places) as described in

[]
EN ISO 80000-1
always rounding up to full integer values (no decimal places)

always rounding down to full integer values (no decimal places)

AE Annual Energy Consumption
C
Rated capacity to calculate the Standard Annual Energy Consumption of tumble
c kg
dryer
CI Two sided confidence interval per test series
EEI Energy Efficiency Index of a tumble dryer
E kWh Average energy consumption for treatment full
dry
E kWh Average energy consumption for treatment half
dry1/ 2
E kWh Average total energy consumption for the combined test series
t
E Wh Energy consumption during post programme phase LU per treatment full
LU,
E Wh Energy consumption during post programme phase LO per treatment full
LO,
E Wh Energy consumption in off mode per treatment full
O,
C % Condensation Efficiency Index for the treatment full

dry
C % Condensation Efficiency Index for the treatment half

dry1/ 2
C % Condensation Efficiency Index for the combined test series
t
l Average value for the total water consumption for the treatment full
L
dry
L l Average water consumption for treatment half

dry1/ 2
L l Average value for the total water consumption for the combined test series
t
W g Nominal partial test load mass
n,part
n Number of sheets at rated test load mass
SH
n Number of pillowcases at rated test load mass
PC
n Number of towels at rated test load mass
T
n Number of sheets in part A
A,SH
– 7 – EN 61121:2013
Symbol Units Definition
n Number of pillowcases in part A
A,PC
n Number of towels in part A
A,T
n Number of sheets in part B
B,SH
n Number of pillowcases in part B
B,PC
n Number of towels in part B
B,T
n Number of test runs per treatment
p Treatment type
part Partial load identifier (part = A,B)
P W Off mode power for treatment full
O
P W Power during post programme phase LU
LU
P W Power during post programme phase LO
LO
r Residual per treatment full
dry
r Residual per treatment half
dry1/2
RMS Root mean square error per test series
SAE Standard Annual Energy Consumption
C
Std Pooled standard deviation per test series
p
s Standard deviation per treatment
x
t min Time for post programme phase LU
mLU
t min Time for post programme phase LO
mLO
min Average programme time for treatment full
t
dry
t min Average programme time for treatment half

dry1/ 2
t min Left on duration
LU
t min Average value for the programme time for the combined test series
t
t min Measurement time for off mode power in treatment full
mO
t “Student T” factor for 5 degrees of freedom for a confidence level of 95 %
5,0.05
V Value per test series
X Post programme phase (X = U, O)

Symbol Units Definition
Average value per treatment
x
X Value for each test run
j
x Average value per treatment
dry,dry1/ 2
4 Requirements
4.1 General
Replace the first paragraph by:
This European Standard does not specify minimum performance requirements for tumble dryers. However,
tumble dryers have to be able to achieve valid test runs and valid test series with final moisture content
values that are in the allowable ranges as set out on Table 6. This European Standard does however set
methods for the measurement of following performance parameters:
5 Test conditions, materials, equipment and instrumentation
5.2.1 Electricity supply
Replace the first two paragraphs by:
The supply voltage shall be maintained throughout the test at 230 V ± 1 % or at 400 V ± 1 % as defined by
the manufacturer’s installation guide. If more than one option for installation is available and no clear
indication for testing is given, the supply voltage shall be 230 V ± 1 %. The supply voltage measured during
the tests shall be recorded.
NOTE In case of a fixed cable, the plug (or the end of the cable) is the reference point to maintain the voltage.
The supply frequency shall be maintained at 50 Hz ± 1 %.
5.2.2.4 Water hardness
Replace by:
Hard water with a total hardness of (2,5 ± 0,2) mmol/l according to EN 60734 shall be used. If available,
naturally occurring water of the correct total hardness and, if applicable, the correct pH, alkalinity and
conductivity may be used. Alternatively, water of the correct total hardness shall be prepared according to
EN 60734.
The total hardness of the water used shall be reported.
The pH, alkalinity and conductivity of the water used to wet the load shall be reported.

– 9 – EN 61121:2013
6 Preparation for testing
6.3 Preparation of the tumble dryer for a test series
Add a second paragraph:
Before each test series the filters, heat exchangers and ducts intended to be serviced by the consumer shall
be cleaned according to the manufacturer’s instructions.
6.4 Preparation of the tumble dryer for a test run
Replace the first paragraph by:
Before each test run the filters, heat exchangers and ducts intended to be serviced by the consumer shall be
cleaned according to the manufacturer’s instructions.
The manufacturer’s specification for the frequency of cleaning of the heat exchanger and related filters
shall be followed. If no specification is given regarding frequency, or the specified frequency is greater than
six cycles then the heat exchanger and its related filters shall not be cleaned between test runs within a test
series. In this context, the manufacturer’s specification for cleaning the heat exchanger and its related filters
means the specification that is directed towards the user. Specifications that are given specifically for use by
test laboratories shall be ignored.
6.5.3.2 Average age requirements for cotton test load items
Add a third paragraph:
The weighted average age limitations for the test load apply only for full load and not for partial load.
6.5.6.1 Cotton test load composition
Add a third paragraph:
Table 3 applies to define the full load for a test series. Refer to ZA.2 regarding the splitting of the full load
for the tests with partial load and for the number of sheets, pillowcases and towels to be used for part A and
part B of the partial loads.
7 Performance measurements – General requirements
Add the following paragraphs at the end of the clause:
For the combined test series according to Annex ZA, the following parameters shall be selected:
• The load type shall be cotton.
• The initial moisture content shall be according to column B in Table 5.

For the combined test series according to Annex ZA, the following parameters shall be measured for the
tumble dryer using a common single test series consisting of 7 runs and using two load sizes (full load and
partial load) as set out in Annex ZA:
– condensation efficiency;
– programme time;
– energy consumption;
– energy consumption in low power modes.
The evaluation of these parameters for the tumble dryer is specified in Annex ZA.
Programmes to be tested on the tumble dryer for the combined test series according to Annex ZA:
A ‘dry cotton’ programme for achieving a final moisture content according Table 6 shall be used in
accordance with the manufacturers’ instruction. For automatic dryers, exactly the same programme setting
for the ‘dry cotton’ programme shall be used for the tests with full load and for the tests with partial load.
For non-automatic dryers, the same settings except the drying duration shall be used for the tests with full
load and for the tests with partial load.
8 Tests for performance
8.1 General
Add a second paragraph:
For the combined test series according to Annex ZA, additional requirements for the test procedure of the
tumble dryer are included in Annex ZA.
8.2.2 Programme
nd rd
Replace 2 and 3 paragraph by:
For automatic tumble dryers and for non-automatic tumble dryers, those programme settings are
selected which aim to achieve final moisture values that are close as possible to the nominal final moisture
content given in Table 6, but no greater than the values given in Table 6.
Add the following after the last paragraph:
For automatic tumble dryers, the same programme setting shall be used for tests with both full loads and
partial loads. For non-automatic tumble dryers, the time settings shall be evaluated separately for full load
and partial load.
8.2.3 Test load
Add the following note at the end of the subclause:
NOTE For a test series, several different test loads of the capacity under test may be used in accordance with ZA.2.
8.2.5 Validity of a test run
Replace the first and second paragraphs by:
For the combined test series according to Annex ZA, the test run shall be declared valid, if the measured
value of the final moisture content of that test run is below the upper limit given in Table 6.

– 11 – EN 61121:2013
8.2.6 Validity of a test series
Replace the first four paragraphs by:
For the combined test series according to Annex ZA, a complete test series consists of three valid tests in
treatment full and four valid tests in treatment half.
If one of the in total seven tests of the series is declared invalid, this single test may be repeated using the
same programme settings as used for the previous tests and the same nominal initial moisture content as all
the previous tests runs in the test series. The invalid test run shall be eliminated completely from any
subsequent evaluation.
If more than one single test of the series is invalid, the whole test series shall be declared invalid.
If the average final moisture content for a test series of seven valid test runs is below the limit in Table 6,
then the test series shall be declared valid and the results are evaluated according to Clause 9. Otherwise,
the test series shall be invalid.
If a test series of 7 valid test runs is invalid, it shall not be made valid by substituting one of the test runs
with an eighth test run.
8.3.2 Procedure
Replace the last paragraph by:
Evaluation shall be made on all valid test runs of a valid test series for the selected programme.
8.4.1 General
Add a paragraph at the end of the subclause:
Evaluation shall be made on all valid test runs of a valid test series for the selected programme.
8.4.2 Procedure
Replace the last paragraph by:
Measurements shall be made on all valid test runs of a valid test series for the selected programme.
9 Assessment of performance
9.1 General
Add a paragraph at the end of the subclause:
For the combined test series according to Annex ZA, additional requirements for evaluation for the tumble
dryers are included in Annex ZA.

9.3 Corrected electrical energy consumption
Replace the first paragraph by:
If the final moisture content of a valid test run is within the target range given in Table 6, then the corrected
electrical energy consumption shall be evaluated as shown below using the measurements determined in
8.3.
Otherwise, no correction shall be made on the energy consumption and the measured energy consumption
shall be declared as the corrected energy consumption.
Add a paragraph at the end of the subclause:
Additional steps of evaluation for the tumble dryer are specified in Annex ZA.
9.4 Corrected water consumption
Replace the first paragraph by:
If the final moisture content of a valid test run is within the target range given in Table 6, then the corrected
water consumption shall be evaluated as shown below using the measurements determined in 8.3.
Otherwise, no correction shall be made on the water consumption and the measured water consumption
shall be declared as the corrected water consumption.
Add a paragraph at the end of the subclause:
Additional steps of evaluation for the tumble dryer are specified in Annex ZA.
9.5 Corrected programme time
Replace the first paragraph by:
If the final moisture content of a valid test run is within the target range given in Table 6, then the corrected
programme time shall be evaluated as shown below using the measurements determined in 8.3.
Otherwise, no correction shall be made on the programme time and the measured programme time shall
be declared as the corrected programme time.
Add a paragraph at the end of the subclause:
Additional steps of evaluation for the tumble dryer are specified in Annex ZA.
9.6 Condensation efficiency
Replace the third paragraph by:
The average condensation efficiency C shall be calculated from the condensation efficiencies of all valid test
runs expressed as a percentage:
Add a paragraph at the end of the subclause:
Additional steps of evaluation for the tumble dryer are specified in Annex ZA.

– 13 – EN 61121:2013
10 Data to be reported
Add second paragraph (at the end of the clause):
For a test series according to Annex ZA data to be reported for the tumble dryer are specified in Annex ZA.
Annexes
A.1 Reference detergent
Replace by:
See EN 60456:2011 , Annex B.
A.2 Specification of test load
Replace by:
See EN 60456:2011 , Annex C.
A.3 The bone dry method of conditioning
Replace by:
See EN 60456:2011 , Annex G.
A.4 Calculation of weighted average age of the cotton test load
Replace by:
See EN 60456:2011, Annex I, but replace the term ‘washing operation’ with the term ‘drying operation’ and
replace the term ‘base load’ with the term ’test load’.
NOTE Annex I applies only for full load and not for partial load.
A.5 Measurements of energy consumption in low power modes
Replace by:
See EN 60456:2011 , Annex L.
The above paragraph is informative.
A.6 Uncertainty of measurement
Replace by:
See EN 60456:2011 , Annex Q
A.7 Environmental aspects of tumble dryer use determined in IEC 61121
Replace by:
See EN 60456:2011 , Annex R
A.8 Source of materials and supplies
Replace by:
See EN 60456:2011 , Annex U.
A.9 Reference washing machine
Replace by:
See EN 60456:2011 , Annex D.
A.10 Reference progamme
Replace by:
See EN 60456:2011 , Annex E.
Annex C (informative) Flow diagrams
st
After the 1 paragraph, add the following new paragraph:
For a test series according to Annex ZA, Figure C.Z1 shows the decision chart illustrating the requirements
for a valid test series for both automatic tumble dryers and non automatic tumble dryers.
Add the following new figure after Figure C.2:

– 15 – EN 61121:2013
Start test series
7 tests done
All final moisture
Condenser
contents within the given yes no
Dryer?
limit for single test?
yes
no
All test runs without
Only one invalid? no interruption due to water
container full?
no
yes
yes
Delete the non complying test
yes
yes
out of the set of tests
Perform 8th test
Average final moisture
content below the given limit
for average?
All final moisture
contents of the remaining runs
within the given limit for single
no
test?
yes
no
Assess 7 tests according to
Repeat test series or stop
the standard
Figure C.Z1 – Decision chart illustrating the requirements for a valid test series
for test series according to Annex ZA

Table D.4 Weighted average age - cotton load
Add the following NOTE:
NOTE The statements concerning weighted average age in A.4 and Table D.4 apply to full loads but not to partial loads.

Add the following annexes:
– 17 – EN 61121:2013
Annex ZA
(normative)
Test procedure for a combined test sequence
of cotton dry with full load and partial load
ZA.1 General
This annex sets out the procedure for the determination of performance and related parameters for full load
and for partial load for a cotton dry programme of the tumble dryer.
The combined test sequence to measure performance parameters is defined as a test series consisting of
7 test runs with two different treatments as follows:
– Treatment full: 3 test runs
– Treatment half: 4 test runs
The two low power modes (Left-on mode and Off-mode) shall be determined for treatment full.
The airborne acoustical noise shall be measured according with EN 60704-1 and EN 60704-2-6 and
determined and verified according with EN 60704-3.
ZA.2 Preparation for testing – Test loads
Subclause 6.5 sets out requirements for the preparation of the test loads used in the tumble dryer.
All requirements of 6.4 shall be applied to define the full load for a test series. For the test runs with partial
load, a full test load shall be split into two parts. This clause defines the splitting of a full load into the two
partial loads (part A and part B) as detailed in Table ZA.1.

Table ZA.1 – Partial loads: number of items in part A and part B of the cotton test load
Nominal Nominal Number of Number of Number of Mass of half
mass of full mass of half sheets pillowcases towels load
load the full load
kg kg kg
Part A 0,5 0 1 2 0,46
Part B 0,5 0 1 3 0,57
Part A 0,75 0 1 5 0,79
1,5
Part B 0,75 0 2 2 0,70
Part A 1 0 2 5 1,03
Part B 1 0 2 4 0,92
Part A 1,25 0 2 7 1,25
2,5
Part B 1,25 0 3 5 1,27
Part A 1,5 1 2 3 1,54
Part B 1,5 1 2 2 1,43
Part A 1,75 1 2 5 1,76
3,5
Part B 1,75 1 2 5 1,76
Part A 2 1 2 7 1,98
Part B 2 1 2 7 1,98
Part A 2,25 1 3 7 2,22
4,5
Part B 2,25 1 3 8 2,33
Part A 2,5 1 3 10 2,55
Part B 2,5 1 3 9 2,44
Part A 2,75 1 4 10 2,79
5,5
Part B 2,75 1 4 9 2,68
Part A 3 1 4 12 3,01
Part B 3 1 4 12 3,01
Part A 3,25 1 5 12 3,25
6,5
Part B 3,25 1 5 12 3,25
Part A 3,5 1 6 12 3,49
Part B 3,5 1 6 12 3,49
Part A 3,75 2 6 8 3,77
7,5
Part B 3,75 1 6 14 3,71
Part A 4 2 6 10 3,99
Part B 4 1 6 17 4,04
Part A 4,25 2 7 10 4,23
8,5
Part B 4,25 1 7 17 4,28
Part A 4,5 2 7 12 4,45
Part B 4,5 2 7 13 4,56
Part A 4,75 2 7 15 4,78
9,5
Part B 4,75 2 7 14 4,67
Part A 5 2 8 15 5,02
Part B 5 2 8 15 5,02
Part A 5,25 3 7 13 5,29
10,5
Part B 5,25 2 8 17 5,24
– 19 – EN 61121:2013
Nominal Nominal Number of Number of Number of Mass of half
mass of full mass of half sheets pillowcases towels load
load the full load
kg kg kg
Part A 5,5 3 7 15 5,51
Part B 5,5 2 8 19 5,46
Part A 5,75 3 8 15 5,75
11,5
Part B 5,75 2 8 22 5,79
12 Part A 6 3 8 17 5,97
Part B 6 3 9 15 5,99
12,5 Part A 6,25 3 8 20 6,30
Part B 6,25 3 9 17 6,21
13 Part A 6,5 3 9 20 6,54
Part B 6,5 3 9 19 6,43
13,5 Part A 6,75 3 9 22 6,76
Part B 6,75 3 10 20 6,78
14 Part A 7 3 9 24 6,98
Part B 7 3 10 22 7,00
14,5 Part A 7,25 4 10 18 7,28
Part B 7,25 3 10 24 7,22
15 Part A 7,5 4 10 20 7,50
Part B 7,5 3 11 24 7,46
NOTE The number of towels in each half load A and B may differ from the number indicated above. In this case the formulas below
shall be used to evaluate the number of towels in each test load.
Part A and Part B shall be made entirely from the full load without adding or subtracting any towels. For each
partial load, the conditioned test load mass shall be recorded.
The requirement for test load mass to be within ± 60 g of the nominal test load mass shall not apply to
partial loads.
For test load masses which are greater than those specified in the Table 3 (> 15 kg), the number of items
for part A and part B is defined as follows:
Part A:
Number of sheets: is the half of the number of sheets at rated test load mass rounded to the
next whole sheet (always round up)

n
 
SH
n =
A,SH
 
 
where
n is the number of sheets at rated test load mass.
SH
Number of pillowcases: is half the number of pillowcases at rated test load mass rounded to the
next whole pillowcase (always round down).

n 
PC
n =
A,PC
 
 
where
n is the number of pillowcases at rated test load mass.
PC
Number of towels: is the nominal partial test load mass minus the number of pillowcases from
part A multiplied by 0,240 minus the number of sheets from part A multiplied
by 0,725 and divided by 0,109 rounded to the nearest whole towel.

W − (n × 0,240)− (n × 0,725)
 
n,part A,PC A,SH
n =
A,T
 
0,109
 
where
W is the nominal partial test load mass;
n,part
is the number of pillowcases in part A;
n
A,PC
is the number of sheets in part A.
n
A,SH
Part B:
Number of sheets: is the number of sheets at rated test load mass minus the number of
sheets from part A.
n =n −n
B,SH SH A,SH
where
n is the number of sheets at rated test load mass;
SH
n is the number of sheets in part A.
A,SH
Number of pillowcases: is the number of pillowcases at rated test load mass minus the number of
pillowcases from part A.
n =n −n
B,PC PC A,PC
where
n is the number of pillowcases at rated test load mass;
PC
n is the number of pillowcases in part A.
A,PC
Number of towels: is the number of towels at rated test load mass minus the number of towels
from part A.
n = n −n
B,T T A,T
where
n is the number of towels at rated test load mass;
T
n is the number of towels in part A.
A,T
– 21 – EN 61121:2013
ZA.3 Performance measurements – general requirements
Performance parameters shall be measured for the tumble dryer using a common single test series
consisting of a total of 7 runs as set out in ZA.4. The evaluation of these parameters for the tumble dryer is
specified in ZA.5.
ZA.4 Procedure for performance tests
ZA.4.1 General
This sub-clause sets out the additional requirements for the test procedure as defined in Clause 8 for the
determination of the following parameters for a cotton load related to the combined test sequence for the
tumble dryer:
- Final moisture content;
- Energy consumption;
- Programme time;
- Condensation efficiency.
ZA.4.2 Test load
Prior to a test series, the following test loads shall be prepared for the tumble dryer.
- A treatment full load having a conditioned mass equal to the rated capacity of the tumble dryer.
- A treatment half part A load as specified in Table ZA.1 for the nominal mass of the treatment full load of
the tumble dryer.
- A treatment half part B load as specified in Table ZA.1 for the nominal mass of the treatment full load of
the tumble dryer.
NOTE 1 Part A and part B may be made from the load used for treatment full tests or from other treatment full loads having the same
nominal mass.
NOTE 2 For a test series one or more test loads each fulfilling the specifications above may be used.

ZA.4.3 Programmes
Programmes to be tested on the tumble dryer:
A cotton dry programme shall be selected in accordance with the manufacturers’ instruction. For automatic
tumble dryers exactly the same programme setting for cotton dry programme shall be used for the tests
with full load and for the tests with partial load.
ZA.4.4 Test runs to be carried out on the tumble dryer
The following 7 test runs shall be carried out on the tumble dryer:
– 3 test runs with treatment full;
– 2 test runs with treatment half using part A of a load;
– 2 test runs with treatment half using part B of a load.

Care is required to ensure that the temperature of the tumble dryer is within the range specified in 6.4 before
the start of every test.
Care is required to ensure that test load part A and part B are not mixed up and no items are lost, gained or
exchanged between test runs.
A test run shall be considered to be invalid if one or more of the following occurs:
– laboratory conditions fail to remain within the tolerances specified in this European standard during the
test run;
– laboratory test equipment or recording systems fail during the test run;
– a relevant test procedure specified in this European standard has not been followed correctly;
– the final moisture of the test load does not meet the requirement according 8.2.2.
If an invalid test run occurs, then the following four rules shall be followed.
1) If only one test run in a test series is invalid regardless of whether it is treatment full or treatment half, it
may be repeated using the same programme settings.
NOTE If a test run of treatment half is repeated, the second part of the full test load is treated separately to ensure the
average age for all items of the full test load.
2) The reason for carrying out additional test run shall be reported.
3) The results from the invalid test run shall be eliminated completely from any subsequent evaluation.
4) All test runs started shall be included when recording the age of the load.
ZA.4.5 Measurement of power and energy consumption in left-on mode
ZA.4.5.1 General
Left-on mode power and energy consumption measurements shall be made on one run per treatment full.
The measurement shall be started after the end of the programme as explained below.
1) This measurement shall be made using one of the two following procedures: Whilst carrying out the test
series of 7 runs described in ZA.4.4 measurements of power and energy consumption in left on mode
shall be made following one treatment full run according to the procedure described in ZA.4.5.2.
2) Carry out one treatment full run and measure power and energy consumption in left on mode according
to the procedure described in ZA.4.5.2.
ZA.4.5.2 Measurement procedure
Power measurements for the left on mode shall be made in accordance with the requirements of EN 50564,
except the requirement defining air speed (EN 50564:2011, 4.2). The air speed close to the appliance under
test shall not be limited to ≤ 0,5 m/s.

– 23 – EN 61121:2013
During these tests the instrumentation for the measurement of electrical energy according to EN 50564 shall
record the required parameters (power and energy consumption):
– in the case of the first procedure explained above for the programme and the left-on mode,
measurements for energy consumption of the tumble dryer shall be commenced when the programme
is initiated (without any user programmed delay) and not stopped at the completion of the programme.
– in the case of the second procedure explained above for the left-on mode only, measurements for energy
consumption of the tumble dryer shall be commenced at the end of the programme.
The tumble dryer shall not be disconnected from the power supply after the end of the programme. The
electrical power supplied during the left on mode power and energy measurement shall meet the quality
requirements given in EN 50564. No user intervention, besides unloading, shall take place on the tumble
dryer before or during the left on mode power and energy measurement.
Data for the required parameters shall be recorded at regular intervals of 1 s or less throughout the test using
a data logger or computer.
The two post programme phases LU and LO for measurement and calculation of left on mode power and
energy consumption shall be measured as follows (see also Figure ZA.1):
– Post programme phase LU (unstable left on mode) shall start after the end of the programme when
the door has been opened. This phase shall last for 30 min.
NOTE 1 The energy consumption of this phase is included in the annual energy consumption.
– Post programme phase LO (left on mode) shall start immediately after LU is finished. Its measurement
shall last for 10 min.
NOTE 2 The power of this phase is used to calculate total annual energy consumption while in left on mode.
When the tumble dryer is equipped with a power management system to revert it automatically to ‘off-mode’
after the end of the programme and the left on mode duration is declared by the manufacturer to last
longer than 30 min, the measurements of the post programme phase LU shall be prolonged to the declared
duration.
When the tumble dryer is equipped with a power management system to revert automatically the machine to
‘off-mode’ after the end of the programme and the left on mode duration is declared by the manufacturer
to last less than 30 min, the measurements of the post programme phase LU shall be made for 30 min,
irrespective of the declared duration.
The duration of the post programme phase LU t used for the calculation of the annual energy
mLU
consumption described in ZA.5.9 shall be equal to the time taken to make the measurement as specified
above.
The time between the end of the programme and start of left on mode power and energy consumption
measurements shall be less than or equal to 5 min.
After starting power and energy consumption measurements in post programme phase LU, the load shall
be removed within 5 min. At the completion of unloading, the door shall remain fully open.

30 + XX
Measurement
Start of
In minimum 30 minutes or
power measurement LU time for L0
longer period if declared by
with opening the door
manufacturer
End of Start of power
programme Measurement LO
P(W)
≤ 5 10
30 + XX
≤ 5
unload
the
LU   Unstable left on mode
machine
LO      Left on mode
T(min)
Figure ZA.1 – Phases of left-on mode power and energy consumption measurement
The measurement of energy consumption shall be done according to EN 50564:2011, 5.3.2, paragraph 7.
Ensure that the following conditions remain relevant for the duration of the measurement:
– connected to mains power for the duration of the test;
– no adverse warning indicators are present (some lights or indicators may be active in this mode);
– laboratory supply water is left on at the specified pressure;
– no network is connected to the product;
– no user intervention on the machine besides unloading.
ZA.4.6 Measurement of power and energy consumption in off mode
The measurements to determine off mode power and energy consumption shall be run for the tumble dryer
in accordance with this annex once for treatment full. At the completion of the programme the tumble
dryer shall be unloaded. For determination of this mode, the tumble dryer shall then be switched off in
accordance with the manufacturers’ instructions. Where there is no power switch, the tumble dryer shall be
left to revert to a steady state power consumption of its own accord.
NOTE Refer to EN 50564 for the definition of power switch.
Ensure that the following conditions remain relevant for the duration of the measurement:
– connected to mains power for the duration of the test;
– no adverse warning indicators are present (normally no lights or indicators are active in this mode);
– laboratory supply water is left on at the specified pressure;
– no network is connected to the product;
– no user intervention on the machine besides unloading.
Programme
Time frame to adjust
measurement devices
– 25 – EN 61121:2013
At the completion of unloading, the door remains open.
Power and energy consumption measurements in off mode shall be determined for a period of not less than
10 min.
For tumble dryers that are equipped with a power switch, the measurement shall start immediately after
switch off the tumble dryer.
For tumble dryers that are not equipped with a power switch, the measurement shall start 10 min after the
end of the post programme phase LU.
Power measurements for this mode shall be made in accordance with the requirements of EN 50564, except
the requirement defining air speed (EN 50564:2011, 4.2).
Data for the required parameters power and energy consumption shall be recorded at regular intervals of 1 s
or less throughout the test using a data logger or computer.
ZA.5 Assessment of performance
ZA.5.1 General
ZA.5 sets out the additional requirements for the assessment of performance as defined in Clause 9 for the
determination of the following parameters for a cotton load related to the combined test sequence for the
tumble dryer:
– evaluation of data (see ZA.5.2);
– evaluation of condensation efficiency (see ZA.5.3);
– evaluation of water consumption (see ZA 5.4);
– evaluation of programme time (see ZA.5.5);
– evaluation of energy consumption of the programme (see ZA.5.6);
– evaluation of power and energy consumption in left-on mode (see ZA.5.7);
– evaluation of power and energy consumption in off mode (see ZA.5.8);
– calculation of the Energy Efficiency Index (EEI) (see ZA.5.9).
In case of an invalid test run, the test run result for the tumble dryer shall not be used for any evaluation of
that tumble dryer within the test series.
ZA.5.2 Evaluation of data
Test data from 7 test runs shall be evaluated. It is required that the results from these 7 test runs are then
averaged to yield a single test result. ZA.5.2 describes how the average value shall be calculated for each
performance parameter.
In addition to the evaluations described in the following sub-clauses, a statistical analysis shall be carried out.
This sub-clause describes the procedure for the statistical analysis.
The confidence interval is described by the RMS-error which is defined by the residuals of the two test
conditions and the number of test runs per treatment. For both treatments the average values, the
standard deviations and the residuals are calculated out of the test runs. For the test series the value and
the two sided confidence interval are calculated out of the treatment values. The pooled standard deviation is
required to calculate the RMS error.

a) The formulae in Clause 5 use the following abbreviations:

dry  means treatment full;
dry1/2  means treatment half.
b) The average value per treatment x is calculated as follows:

n
x
∑ j
j=1
x=
n
where
x is the value for each measured test run;
j
n is the number of test runs per treatment.
c) The standard deviation per treatment s is calculated as follows:
x
n
s = (x − x)
x ∑ j
n− 1
j=1
where
x is the average value per treatment;
x is the value for each test run;
j
n is the number of test runs per treatment.
d) The sum of squared residuals per treatment r is calculated as follows:
x
n
r = (x − x)
x ∑ j
j=1
where
x is the average value per treatment;
x is the value for each test run of the treatment;
j
n is the number of test runs per treatment.
e) The average value per test series V is calculated as follows:

V= (3×x + 4×x )/7
...