Electric dishwashers for household use - Methods for measuring the performance

This European Standard applies to electric dishwashers for household use that are supplied with hot and/or cold water. The object is to state and define the principal performance characteristics of electric dishwashers for household use and to describe the standard methods of measuring these characteristics. This standard is concerned neither with safety nor with performance requirements.

Elektrische Geschirrspüler für den Hausgebrauch - Messverfahren für Gebrauchseigenschaften

Lave-vaisselle électriques pour usage domestique - Méthodes de mesures de l'aptitude à la fonction

La CEI 60436:2004 s'applique aux lave-vaisselle électriques à usage domestique alimentés en eau chaude et/ou froide. L'objet de la présente norme est d établir et de définir les caractéristiques principales d aptitude à la fonction des lave-vaisselle électriques à usage domestique et de décrire les méthodes normalisées de mesure de ces caractéristiques.

Električni pomivalni stroji za gospodinjstva - Metode za merjenje lastnosti (IEC 60436:2004, spremenjen)

Ta standard se uporablja za električne pomivalne stroje za gospodinjstva, ki so priključeni na vročo in/ali hladno vodo. Namen tega standarda je navesti in opredeliti glavne značilnosti delovanja električnih pomivalnih strojev za gospodinjstva ter opisati standardne metode merjenja teh značilnosti. Ta standard ne opredeljuje varnostnih zahtev niti zahtev glede zmogljivosti.

General Information

Status
Withdrawn
Publication Date
05-Mar-2008
Current Stage
6060 - Document made available
Due Date
06-Mar-2008
Completion Date
06-Mar-2008

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SLOVENSKI STANDARD
SIST EN 50242:2008
01-september-2008
1DGRPHãþD
SIST EN 50242:2001
SIST EN 50242:2001/A1:2001
SIST EN 50242:2001/A2:2002
SIST EN 50242:2001/A3:2003
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Electric dishwashers for household use - Methods for measuring the performance
Elektrische Geschirrspüler für den Hausgebrauch - Messverfahren für
Gebrauchseigenschaften

Lave-vaisselle électriques pour usage domestique - Méthodes de mesures de l'aptitude

à la fonction
Ta slovenski standard je istoveten z: EN 50242:2008
ICS:
97.040.40 Pomivalni stroji Dishwashers
SIST EN 50242:2008 en

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

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SIST EN 50242:2008
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SIST EN 50242:2008
EUROPEAN STANDARD
EN 50242
EN 60436
NORME EUROPÉENNE
March 2008
EUROPÄISCHE NORM
ICS 97.040.40 Supersedes EN 50242:1998 + A1:1999 + A2:2001 + A3:2003
English version
Electric dishwashers for household use -
Methods for measuring the performance
(IEC 60436:2004, modified)
Lave-vaisselle électriques pour usage Elektrische Geschirrspüler für den
domestique - Hausgebrauch -
Méthodes de mesures de l'aptitude à la Messverfahren für
fonction Gebrauchseigenschaften
(CEI 60436:2004, modifiée) (IEC 60436:2004, modifiziert)

This European Standard was approved by CENELEC on 2007-09-01. 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 Central Secretariat 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 Central Secretariat has the same status as the official versions.

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

Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy,

Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia,

Slovenia, Spain, Sweden, Switzerland and the United Kingdom.
CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
Central Secretariat: rue de Stassart 35, B - 1050 Brussels

© 2008 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.

Ref. No. EN 50242:2008 E
EN 60436:2008 E
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EN 60436:2008
Foreword

This European Standard consists of the text of IEC 60436:2004 prepared by SC 59A, Electric

dishwashers, of IEC TC 59, Performance of household electrical appliances, together with all

common modifications necessary for application in Europe. These common modifications

have been prepared by the Technical Committee CENELEC TC 59X, Consumer information

related to household electrical appliances.

The text of the draft was submitted to the formal vote and was approved by CENELEC with a

double numbering: EN 50242/EN 60436 on 2007-09-01.

This European Standard supersedes EN 50242:1998 (+ corrigendum February 2000) + A1:1999 +

A2:2001 + A3:2003.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2008-10-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2010-09-01

Clauses, subclauses, notes, tables and figures which are additional to those in IEC 60436:2004

are prefixed “Z”.
Text of EN 50242/EN 60436

The text of this European Standard consists of the text of the International Standard

IEC 60436:2004 including the European common modifications written in red and identified by

a vertical line in the left margin of the text.
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EN 60436:2008
Contents

1 Scope...............................................................................................................................5

2 Normative references .......................................................................................................5

3 Definitions related to the appliance...................................................................................5

4 List of measurements .......................................................................................................7

5 General conditions for measurements...............................................................................7

5.1 General ...................................................................................................................7

5.2 Conditioning of the machine under test and sequence of test procedures ................8

5.3 Electricity supply for machines ................................................................................8

5.4 Test programme ......................................................................................................9

5.5 Ambient conditions ..................................................................................................9

5.6 Water supply ...........................................................................................................9

5.7 Detergent ..............................................................................................................10

5.8 Rinse agent...........................................................................................................11

5.9 Salt .......................................................................................................................11

6 Cleaning performance ....................................................................................................11

6.1 General and purpose.............................................................................................11

6.2 Load......................................................................................................................12

6.3 Soiling agents .......................................................................................................13

6.4 Preparation and application of soiling agents ........................................................13

6.5 Drying of the soiled dishes ....................................................................................22

6.6 Loading and operating...........................................................................................23

6.7 Evaluation .............................................................................................................23

6.8 Results..................................................................................................................28

7 Drying performance ........................................................................................................28

7.1 General and purpose.............................................................................................28

7.2 Load......................................................................................................................29

7.3 Loading and operating...........................................................................................29

7.4 Evaluation .............................................................................................................29

7.5 Expressing results.................................................................................................32

8 Energy consumption, water consumption and time ........................................................32

8.1 General and purpose.............................................................................................32

8.2 Method of measurement ........................................................................................32

9 Airborne acoustical noise ...............................................................................................34

Z1 Data to be reported ........................................................................................................35

Z2 Tolerances and control procedures.................................................................................36

Annex A (normative) Place settings and serving pieces (non-AHAM style load) ...................38

Annex B (normative) AHAM style load (to be used for other style dishwashers, such as

U.S. style) ...............................................................................................................40

Annex C (normative) Illustration of soil distribution ..............................................................43

Annex D (normative) Test materials for laboratories.............................................................45

Annex E (normative) Description of the reference machine ..................................................48

Annex F (informative) Addresses of suppliers ......................................................................52

Annex G (normative) Microwave oven and through-circulation thermal cabinet ....................57

Annex H (informative) Guidelines for assessing cleaning performance.................................61

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Annex I (normative) Test enclosure for built-in dishwasher ..................................................63

Annex J (informative) Flow chart – Test sequence for EN 50242.........................................64

Annex K (informative) Shade chart.......................................................................................65

Annex L (informative) Test report format..............................................................................66

Annex M (informative) Adjusting water consumption in the reference dishwasher ................69

Annex ZA (informative) Pictures of the soiled items .............................................................70

Bibliography .................................................................................................................................................. 73

Figure 1 – Position of the glasses on the microwave turntable ..............................................16

Figure I.1 – Test enclosure for built-in dishwasher ................................................................63

Figure G.1 – Illustration chart 1: Location of the thermocouple on upper,

intermediate and lower wire sheet ....................................................................59

Figure G.2 – Illustration chart 2: The thermal cabinet filled with dishes

(Pictures of the soiled items in Annex ZA) ........................................................60

Table 1 – Evaluation of cleaning tests...................................................................................24

Table 2 – Evaluation to determine the cleaning index ...........................................................25

Table 3 – Numerical values of the t-factor for statistical calculations.....................................27

Table 4 – Evaluation to determine the drying index ...............................................................30

Table L.1 – Detailed results for test machines and reference machine ..................................68

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1 Scope

This European Standard applies to electric dishwashers for household use that are supplied

with hot and/or cold water.

The object is to state and define the principal performance characteristics of electric

dishwashers for household use and to describe the standard methods of measuring these

characteristics.

This standard is concerned neither with safety nor with performance requirements.

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 60350, Electric cooking ranges, hobs, ovens and grills for household use – Methods for

measuring performance (IEC 60350)

EN 60704-2-3, Household and similar electrical appliances – Test code for the determination

of airborne acoustical noise – Part 2-3: Particular requirements for dishwashers
(IEC 60704-2-3)

EN 60704-3, Test code for the determination of airborne acoustical noise emitted by

household and similar electrical appliances – Part 3: Procedure for determining and verifying

declared noise emission values (IEC 60704-3)

EN 60705, Household microwave ovens – Methods for measuring performance (IEC 60705)

EN 60734, Household electrical appliances – Performance – Hard water for testing
(IEC 60734)
ISO 607, Surface active agents and detergents – Methods of sample division
ANSI/AHAM DW-1:1992, American National Standard: Household electric dishwashers
ISO 3310, Test sieves - Technical requirements and testing
3 Definitions related to the appliance
3.1
dishwasher

machine which cleans, rinses, and dries dishware, glassware, cutlery, and, in some cases,

cooking utensils by chemical, mechanical, thermal, and electric means. A dishwasher may or

may not have a specific drying operation at the end of the program
3.2
rated dishwasher capacity

whole number of place settings together with the serving pieces (see Annexes A & B) stated

by the manufacturer, which can be cleaned and dried when loaded in accordance with the

manufacturer’s instructions
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3.3
operation

each event that occurs during the dishwasher programme such as cleaning, rinsing or drying

3.4
programme

series of operations which are pre-defined within the dishwasher and which are declared as

suitable for specified levels of soil and/or type of load and together form a complete cycle

3.5
cycle

complete washing, rinsing, and drying process, as defined by the programme selected,

consisting of a series of operations
3.6
programme time

programme time is measured from the initiation of the programme (excluding any user

programmed delay) until an end of programme indicator. If there is no end of programme

indicator, the programme time is equal to the cycle time
3.7
cycle time

cycle time is measured from the initiation of the programme (excluding any user programmed

delay) until all activity ceases (i.e. the end of the cycle)
3.8
automatic dispenser

device activated automatically which injects or dispenses detergent, rinse agent, etc., one or

more times into the dishwasher at predetermined points in the dishwasher cycle
3.9
non-automatic dispenser

device, usually a fixed cup or cavity on the dishwasher door, cover, or dish rack, which

deposits a previously measured amount of detergent, rinse agent, etc., into the dishwasher at

the beginning of the dishwasher cycle
3.10
water softener
device which reduces the hardness of water
3.11
rack
support for holding dishware, cutlery, and/or glassware in the dishwasher
3.12
detergent

cleaning agent in powder, granular, tablet or liquid form, manufactured for use in household

electric dishwashers to aid in the removal of food soils by chemical means

NOTE A reference detergent in powder form is specified for use in this standard (see 5.7).

3.13
rinse agent

chemical agent added to the water in the last rinsing operation to improve the drying effect

and reduce water marks

NOTE Two reference rinse agents are specified for use in this standard (see 5.8).

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3.14
serving pieces
defined set of crockery and cutlery for serving (see Annexes A and B)
3.15
place settings

defined set of crockery, glass and cutlery for use by one person (see Annexes A and B)

4 List of measurements

Standard methods of measuring the performance characteristics are determined as follows:

– the cleaning performance according to Clause 6;
– drying performance according to Clause 7;
– energy, water consumption and time according to Clause 8;
– airborne acoustical noise according to Clause 9.
5 General conditions for measurements
For energy labelling purposes the standard is only used with cold water.
5.1 General

The dishwasher manufacturer’s instructions regarding installation and use of the dishwasher

shall be followed, except where there is a conflict, in which case this standard shall prevail.

Performance tests according to this standard document shall be generally carried out on a

new machine, with a reference machine running parallel with the machine(s) under test, i.e.,

at the same time under the same conditions using soil prepared at the same time from the

same batch. The reference machine shall be in accordance with the description given in

Annex E.

The reference machine shall always be installed as a free standing machine independent of

the type of machine under test.

Before commencing measurements, the dishwasher and the reference machine shall be

checked to ensure that they are operating properly.

All tests shall be started with the appliances at the ambient temperature according to 5.5.

5.1.1 Free standing dishwashers

Dishwashers shall be tested as free standing except where they are designated as built–in or

integrated (refer to 5.1.2).

The dishwasher manufacturer’s instructions regarding installation and use of the dishwasher

shall be followed.
5.1.2 Built in and integrated dishwashers

Built-in dishwashers have to be installed in an enclosure. See Annex I, Figure I.1.

The front edge of the housing of the dishwasher (except the door) shall be 20 mm to 25 mm

behind the front edge of the test enclosure. If required by the manufacturer’s instructions, the

enclosure shall be provided with ventilation openings accordingly.
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If an appliance is provided with spacers, strips or other special means of solid or resilient

material for closing the gap(s) between the contours of the appliance and the cabinet

enclosure, these means shall be used accordingly. If such means are not provided, the gap(s)

shall be left open.

Appliances to be integrated shall be installed under the same conditions as built-in

appliances. In addition, the door of the dishwasher shall be equipped, in accordance with the

manufacturer’s instruction, with a board of the maximum size allowed by the manufacturer

and of the same material and thickness as the test enclosure; see Annex I.

Moreover, for integrated types, the test enclosure shall be provided, in accordance with the

manufacturer’s instructions, at its lower front side with a skirting board of the maximum height

which corresponds with the size of the board on the door of the appliance and of the same

material and thickness as the test enclosure, see Annex I. If no instructions are given by the

manufacturer, a skirting board as described above shall be pressed against the skirting board

of the appliance.
5.2 Conditioning of the machine under test and sequence of test procedures

Before conducting the performance tests, the dishwasher shall be operated for three complete

cycles using a clean load with reference detergent (specified in 5.7) and without rinse agent.

No additional cycles shall be carried out on the machine under test between the sequential

steps specified in the following procedure.

The tests shall be performed in the following order: cleaning performance (Clause 6) then

drying performance (Clause 7). The determination of energy, water and cycle/program time

(Clause 8) shall be done in conjunction with a cleaning performance test (Clause 6).

NOTE 1 The above sequence is necessary for better reproducibility, i.e. to avoid differences in drying

performance due to the aging process of the plastic parts in the dishwasher (for example, racks).

NOTE 2 Any cycles or operations performed on the appliance during the manufacture of the product are ignored.

NOTE 3 Noise tests require that the test should be carried out before the rinse aid dispenser is filled for the first

time.
5.3 Electricity supply for machines
5.3.1 Electricity supply for test machine
5.3.1.1 Voltage
The supply voltage shall be maintained at 230 V + 1 %.
The supply voltage measured during the tests shall be recorded.
NOTE Also the micro-wave oven shall be operated under the same conditions.
5.3.1.2 Frequency

The supply frequency shall be set at the rated frequency of the machine and maintained

within the range ± 1 % throughout the test. If a frequency range is indicated, then the testing

shall be carried out at the nominal frequency of the country in which the appliance is intended

to be used. The measured frequency shall be reported.

NOTE If the rated frequency of the machine differs from the system frequency of the country of intended use,

measurements should be carried out at the nominal frequency of the country of intended use.

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5.3.2 Electricity supply for the reference machine
5.3.2.1 Voltage

The supply voltage shall be set at 230 V a.c. and maintained within ± 1 % throughout the test.

The measured voltage shall be reported.
5.3.2.2 Frequency

The supply frequency shall be set at 50 Hz and maintained within ± 1 % throughout the test.

The measured frequency shall be reported.
5.4 Test programme

The first programme to be tested shall be the one recommended by the manufacturer for a

normally soiled load.

NOTE The manufacturer has to declare the programme to be used for the purpose of energy labelling. It shall be

a programme for normal use, using normal table ware, excluding cooking utensils.

The same programme shall be used for measuring the cleaning performance according to

Clause 6, the drying performance according to Clause 7, the energy and water consumption

and time according to Clause 8, and the noise according to Clause 9, if tested.
Additional programmes may then be tested.
5.5 Ambient conditions

The following ambient conditions shall be maintained throughout the measurements.

Oven drying method
– Ambient temperature of the room: (23 ± 2) °C
– Relative humidity: (55 ± 5) % RH
Air dry method
– Ambient temperature of the room: (23 ± 2) °C
– Relative humidity: (65 ± 10) % RH

The ambient temperature and the relative humidity measured during the tests shall be

reported in the test report.
For energy label purposes the air dry method is not permitted.
5.6 Water supply
5.6.1 General

The actual water conditions (temperature, hardness, and pressure) maintained during the

tests shall be reported in the test report.

NOTE Some countries specify a hot water temperature for regulatory purposes, in which case this water

temperature should be used for testing.
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5.6.2 Water supply – Temperature
The temperature of the supply water shall be
– cold water feed temperature:
• (15 ± 2) °C.
– hot water feed temperature:
• temperature indicated by the manufacturer ± 2 °C, or
• where a range is specified which does include 60 °C, (60 ± 2) °C, or
• where a range is specified which does not include 60 °C, the value nearest to
60 °C ± 2 °C, or
• (60 ± 2) °C, if instructions are not given.
For energy label purposes the use of hot water is not permitted.
5.6.3 Hardness

A water hardness of (2,5 ± 0,5) mmol/l for hard water areas or ≤ 0,7 mmol/l for soft water

areas shall be used. If water hardness needs to be adjusted to meet these specifications, it

shall be prepared according to EN 60734 – Method C. The measured water hardness shall be

reported. The water hardness used in the test shall be the one most applicable to the country

of intended use.
For energy label purposes only water of 2,5 +/- 0,5 mmol/l shall be used.

If the appliance is not equipped with a water softener the hardest water which is permitted by

the manufacturer's instructions shall be used.

NOTE The impact of water hardness variation between 0,0 mmol/l to 0,7 mmol/l is still under investigation.

5.6.4 Water pressure

The pressure of the water supply at each water inlet shall be set at 240 kPa and shall be

maintained within the range ± 20 kPa, including during all fills. The measured water pressure

shall be reported. Where the manufacturer specifies a range of water pressure that does not

include 240 kPa ± 20 kPa, the water pressure shall be set at the end of the pressure range

closest to 240 kPa ± 20 kPa.
5.7 Detergent

For energy label purposes the reference detergent B, as described in Annex D, shall be used.

The quantity shall be as recommended by the manufacturer. But shall not be more than

- 2,5 g/place setting for dishwashers with a capacity of > 10 place settings;
- 3,0 g/place setting for dishwashers with a capacity of < 10 place settings.
If no recommendation is given by the manufacturer, use
- 2,0 g/place setting for dishwashers with a capacity of > 10 place settings;
- 2,5 g/place setting for dishwashers with a capacity of < 10 place settings.

The quantity of detergent, in grams per place setting, used during the tests shall be recorded.

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The detergent shall be placed in the dishwasher immediately prior to starting the programme.

If a dispenser is incorporated in the dishwasher it shall be used. The dispenser shall be clean

and dry prior to the placement of detergent. In the absence of manufacturer’s

recommendations, the detergent shall be placed in the main compartment of the dispenser.

Detergent from the same batch shall be used for the dishwasher under test and for the

reference dishwasher.

The detergent shall be stored in waterproof bags in quantities of no more than 1 kg in a cool

and dry atmosphere. It shall be used within six months after production and within one month

of opening.

Before using, the detergent shall be homogenized in accordance with ISO 607 for example using a

sample dividing device.
NOTE For a supplier of a suitable sample dividing device, see Annex F.
5.8 Rinse agent

The rinse agent as described in Annex D shall be used. For a water hardness of 2,5 mmol/l,

Formula III rinse aid (acidic) shall be used. For a water hardness of ≤ 0,7 mmol/l, Formula IV

(neutral) rinse aid shall be used.
For energy labelling purposes only Formula III rinse aid (acidic) shall be used.

NOTE 1 As a guide, acidic rinse agent is to be used with hard water and neutral rinse agent with soft water.

However, where one type of rinse aid is not generally available in the country of intended use, the other may be

specified regardless of the water hardness. In dishwashers with softeners in hardwater areas, the hardness in the

final rinse will be below 0,7 mmol/l.
For dishwashers with an adjustable automatic dispenser, the setting shall be as

recommended by the manufacturer. In the absence of such an indication, the setting shall be

used which gives the lowest quantity of rinse aid.

NOTE 2 Any recommendation by the manufacturer to the user to manually adjust the initial setting, based on

experience, is disregarded.

For machines without automatic dispensers, the rinse agent shall be added manually, if so

recommended by the manufacturer and in accordance with their instructions.
5.9 Salt

If the dishwasher is equipped with a water softener that requires salt, fill in accordance with

the manufacturer’s instructions for the water hardness used for the test. For specification of

the salt, see Annex D.
6 Cleaning performance
6.1 General and purpose

The purpose of this test is to measure how well the appliance cleans normally soiled place

settings and serving pieces.

The tests are carried out in parallel with the reference machine specified in Annex E. Soiling

of the test loads for the test machine(s) and the reference machine shall be prepared in

parallel.
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The reference machine shall also be run in parallel with any test machine(s). For a large

number of test loads, it may be necessary to have more than one person preparing soils, but

one person shall prepare each soil type for all loads. Similarly, one person shall apply each

soil type for all loads (person preparing soils may be different than the person applying soils).

Detergent and rinse agents are used according to 5.7 and 5.8.
The sequence of the test procedure as specified in 5.2 shall be followed.

For details of preparation, the instructions of the video available by the supplier given in

Annex F must be followed. Additionally Annex N contains pictures of typi
...

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