SIST EN 60456:2016/oprAB:2023

SLOVENSKI STANDARD
SIST EN 60456:2016/oprAB:2023
01-april-2023
Gospodinjski pralni stroji - Metode za merjenje funkcionalnosti - Dopolnilo AB
Clothes washing machines for household use - Methods of measuring the performance
Waschmaschinen für den Hausgebrauch - Verfahren zur Messung der
Gebrauchseigenschaften
Machines à laver le linge pour usage domestique - Méthodes de mesure de l'aptitude à
la fonction
Ta slovenski standard je istoveten z: EN 60456:2016/prAB
ICS:
97.060 Aparati za nego perila Laundry appliances
SIST EN 60456:2016/oprAB:2023 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 60456:2016/oprAB:2023

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SIST EN 60456:2016/oprAB:2023


EUROPEAN STANDARD DRAFT
EN 60456:2016
NORME EUROPÉENNE

EUROPÄISCHE NORM
prAB
February 2023
ICS 97.060 -
English Version
Clothes washing machines for household use - Methods of
measuring the performance
Machines à laver le linge pour usage domestique - Waschmaschinen für den Hausgebrauch - Verfahren zur
Méthodes de mesure de l'aptitude à la fonction Messung der Gebrauchseigenschaften
This draft amendment prAB, if approved, will modify the European Standard EN 60456:2016; it is submitted to CENELEC members for
enquiry.
Deadline for CENELEC: 2023-05-05.

It has been drawn up by CLC/TC 59X.

If this draft becomes an amendment, CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which
stipulate the conditions for giving this amendment the status of a national standard without any alteration.

This draft amendment was established by CENELEC 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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Türkiye and the United Kingdom.

Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are aware and to
provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without notice and
shall not be referred to as a European Standard.



European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2023 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Project: 75842 Ref. No. EN 60456:2016/prAB E

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SIST EN 60456:2016/oprAB:2023
EN 60456:2016/prAB:2023 (E)
Contents Page
1 European foreword . 3
2 1 Modification to Clause 2, “Normative references” . 5
3 2 Modification to Clause 3, “Terms, definitions and symbols” . 5
4 3 Modification to Clause 5, “Test conditions, materials, equipment and instrumentation” . 14
5 4 Modification to Clause 6, “Preparation for testing” . 15
6 5 Modification to Clause 7, “Performance measurements – general requirements” . 19
7 6 Modification to Clause 8, “Tests for performance” . 20
8 7 Modification to Clause 9, “Assessment of performance” . 21
9 8 Modification to Annex A, “Specification of stain test strips with standardized soiling” . 21
10 9 Replacement of Annex B, “Reference detergents” . 22
11 10 Modification to Annex C, “Specifications for base loads” . 24
12 11 Modification to Annex D, “Reference machine specification” . 26
13 12 Modification to Annex E, “Reference machine programme definitions” . 26
14 13 Modification to Annex H, “Folding and loading the test load” . 26
15 14 Modification to Annex I, “Calculation of weighted average age of the cotton base load” . 27
16 15 Modification to Annex K, “Laboratory internal testing guide” . 29
17 16 Modification to Annex O, “Additional evaluation of washing performance” . 29
18 17 Modification to Annex P, “Testing deviations to reduce costs and their limitations” . 29
19 18 Modification to Annex S, “Test report – data to be reported” . 30
20 19 Modification to Annex ZA, “Test procedure for a combined test sequence of eco 40-60
21 with full load, half load and quarter load” . 32
22 20 Modification to Annex ZB, “Multi-Drum Washing Machines” . 68
23 21 Modification to Annex ZC, “Normative references to international publications with their
24 corresponding European publications” . 70
25 22 Addition of Annex ZD, “Low power modes for washing machines” . 71
26 23 Addition of Annex ZE, “Method for the determination of temperature inside the laundry
27 load” . 77
28 24 Addition of Annex ZF, “Method for the determination of rinsing effectiveness by
29 measurement of the surfactant content at textile materials”. 84
30 Annex ZZA (informative) Relationship between this European Standard and the energy labelling
31 requirements of Commission Delegated Regulation (EU) 2019/2014 aimed to be covered . 105
32 Annex ZZB (informative) Relationship between this European Standard and the ecodesign
33 requirements of Commission Regulation (EU) 2019/2023 aimed to be covered. 108
34 25 Modification to Bibliography . 110
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SIST EN 60456:2016/oprAB:2023
EN 60456:2016/prAB:2023 (E)
35 European foreword
36 This document (EN 60456:2016/prAB:2023) has been prepared by CLC/TC 59X “Performance of household
37 and similar electrical appliances”.
38 This document is currently submitted to the Enquiry.
39 The following dates are proposed:
• latest date by which the existence of this (doa) dor + 6 months
document has to be announced at national
level
• latest date by which this document has to be (dop) dor + 12 months
implemented at national level by publication of
an identical national standard or by
endorsement
• latest date by which the national standards (dow) dor + 36 months
conflicting with this document have to be (to be confirmed or
withdrawn modified when voting)
40 This document introduces the following technical modifications:
41 a) the programme to be tested for the combined test series is the new introduced eco 40-60 programme.
42 This programme needs to be tested with default settings with the given temperature;
43 b) the test loads that have to be used for testing are full, half and quarter of the rated capacity of the
44 washing machine. Therefore, a new quarter load is introduced and defined to be approximately a
45 quarter of the rated capacity (see Table ZA.15). The quarter load is treated as a separate load and not
46 created by dividing full load or half load;
47 c) the number of test runs per treatment for the combined test series changed to 3 tests with full load, 4
48 tests with half load and 3 tests with quarter load;
49 d) the time between two subsequent test runs within one day changed from 2 h to one hour;
50 e) the normalization run is included in the calculation of the load age. The maximum number of usages for
51 base load with a load mass greater or equal to 4.5 kg was changed to be between 35 and 60
52 normalization runs and test runs and the maximum number of usages for base load with a load mass
53 less than 4.5 kg was changed to be between 30 and 67 normalization runs and test runs
54 f) Annex ZE is integrated, which defines the test procedure for temperature inside the load;
55 g) Annex ZF is integrated, which defines the test procedure for rinsing effectiveness;
56 h) the procedure to measure low power modes is modified (see Annex ZD);
57 i) specific weighting factors are introduced for the calculation of the weighted average value of the
58 combined test series and
59 j) Annex ZB Tolerances and control procedures is deleted. Annex ZB is replaced by a new Annex ZB which
60 defines the testing procedure for multi-drum washing machines.
61 k) A new standard powder detergent IEC-P is introduced (see Annex B), that substitutes the standard
62 powder detergent IEC-A* by replacing the bleach component sodium perborate with sodium percarbonate
63 due to Commission Regulation (EU) 2020/171 amending Annex XIV to Regulation (EC) No 1907/2006 of
3

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SIST EN 60456:2016/oprAB:2023
EN 60456:2016/prAB:2023 (E)
64 the European Parliament and of the Council concerning the Registration, Evaluation, Authorization and
65 Restriction of Chemicals (REACH). According to REACH Regulation Article 56, the substances which are
66 listed in the Annex XIV cannot be used or placed on the market after the “sunset date”, unless the
67 authorization is granted. Sodium perborate has a sunset date of 27th of May 2023 after having been
68 classified as toxic to reproduction.
69 l) The tolerances for the remaining moisture content in Table E.2 are adapted, due to change in the
70 commercially available material.
71 m) In normative clauses undated references were dated.
72 This document has been prepared under a Standardization Request given to CENELEC by the European
73 Commission and the European Free Trade Association, and supports essential requirements of EU
74 Directive(s) / Regulation(s).
75 For the relationship with EU Directive(s) / Regulation(s), see informative Annexes ZZA and ZZB, which are an
76 integral part of this document.
77 Annex ZA sets out the procedure to be applied for testing according to Commission Regulations with regard to
78 energy labelling and ecodesign and provides all necessary links to all relevant clauses of this document.
4

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EN 60456:2016/prAB:2023 (E)
79 1 Modification to Clause 2, “Normative references”
80 Add the following references:
1
81 EN 60704-2-4:2012, Household and similar electrical appliances - Test code for the determination of airborne
82 acoustical noise - Part 2-4: Particular requirements for washing machines and spin extractors
83 EN 50564:2011, Electrical and electronic household and office equipment - Measurement of low power
84 consumption
2
85 Electrical and electronic household and office equipment - Measurement of networked
EN 50643:2018,
86 standby power consumption of edge equipment
87 2 Modification to Clause 3, “Terms, definitions and symbols”
88 Add the following table before 3.1.1:
89 “
90 Table 3.1 — Reference table for terms in alphabetical order
Term subclause
automatic machine 3.1.10
base load 3.1.18
combined cycle time 3.1.Z19
combined programme time 3.1.Z18
combined rated capacity 3.1.Z17
combined test series 3.1.Z10
Cycle 3.1.15
cycle time 3.1.25
delay start 3.1.Z22
eco 40–60 3.1.Z24
end of programme 3.1.24
full load 3.1.Z1
half load 3.1.Z2
horizontal axis washing machine 3.1.8
left on mode 3.1.29
main wash duration 3.1.26
manual washing machine 3.1.9
multi-drum mode 3.1.Z14
multi-drum washing machine 3.1.Z13
network 3.1.Z21
nominal test load mass 3.1.21
off-mode 3.1.28

1
As amended by EN 60704-2-4:2012/A11:2020.
2
As amended by EN 50643:2018/A1:2020.
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Term subclause
operation 3.1.13
part A 3.1.Z3
part B 3.1.Z4
programme 3.1.14
programme time 3.1.23
quarter load 3.1.Z5
rated capacity 3.1.22
rated voltage 3.1.30
reference machine 3.1.3
remaining moisture content 3.1.27
simultaneous cycle 3.1.Z16
simultaneous programme 3.1.Z15
spin extraction 3.1.16
spin extractor 3.1.5
spin speed 3.1.17
standard extractor 3.1.6
standby mode 3.1.Z20
test load 3.1.19
test load mass 3.1.20
test run 3.1.11
test series 3.1.12
test washing machine 3.1.2.
Treatment 3.1.Z6
treatment full 3.1.Z7
treatment half 3.1.Z8
treatment quarter 3.1.Z9
vertical axis washing machine 3.1.7
washer-dryer 3.1.4
washing machine 3.1.1
wrinkle guard function 3.1.Z23
91 “
92 Replace the term 3.1.12 and terms 3.1.22 to 3.1.24 and 3.1.28 with the following:
93 “
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EN 60456:2016/prAB:2023 (E)
94 3.1.12
95 test series
96 repetitions of test runs with the same treatment which, collectively, are used to assess the performance for
97 one treatment
98 3.1.22
99 rated capacity
100 maximum mass of dry textiles of a particular type which the manufacturer declares can be treated in the test
101 washing machine on the programme selected
102 Note Z1 to entry: For multi-drum mode washing machines the rated capacities are for each individual drum.
103 Note Z2 to entry: For different textile types the rated capacity of a multi-drum washing machine is usually different.
104 3.1.23
105 programme time
106 time from the initiation of the programme (excluding any user programmed delay) until the end of the
107 programme
108 Note Z1 to entry: If the end of programme is not indicated, the programme time is equal to the cycle time.
109 3.1.24
110 end of programme
111 the time when the test washing machine indicates the end of the programme and the load is accessible to
112 the user
113 Note Z1 to entry: Where there is no end of programme indicator and the door is locked during operation, the
114 programme is complete when the load is accessible to the user. Where there is no end of programme indicator and the
115 door is not locked during operation, the programme is complete when the power consumption of the appliance drops to
116 some steady-state condition and is not performing any function.
117 Note Z2 to entry: An indication of the end of the programme may be in the form of a light (on or off), a sound, an indicator
118 shown on a display or the release of a door or latch. In some washing machines there may be a short delay from an end
119 of programme indicator until the load is accessible by the user.
120 3.1.28
121 off-mode
122 condition in which the test washing machine is connected to the mains and is not providing any function
123 Note Z1 to entry: The following is also considered as off mode:
124 (a) conditions providing only an indication of off-mode;
125 (b) conditions providing only functionalities intended to ensure electromagnetic compatibility.
126 “
127 Replace terms 3.1.Z1 to 3.1.Z10 and terms 3.1.Z13 and 3.1.Z14 with the following:
128 “
129 3.1.Z1
130 full load
131 test load used for a combined test series according to Annex ZA, having a nominal mass that is equal to the
132 rated capacity of the test washing machine
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133 3.1.Z2
134 half load
135 test load, part A or part B, used for a combined test series according to Annex ZA, having a nominal mass
136 that is approximately equal to a half of the rated capacity of the test washing machine
137 3.1.Z3
138 part A
139 one half of the full load
140 3.1.Z4
141 part B
142 remaining part of the full load excluding part A
143 3.1.Z5
144 quarter load
145 test load used for a combined test series according to Annex ZA, having a nominal mass that is
146 approximately equal to a quarter of the rated capacity (see Table ZA.15) of the test washing machine
147 3.1.Z6
148 treatment
149 combination of test load and programme to be used for a test run within a test series
150 3.1.Z7
151 treatment full
152 eco 40-60 programme with full load
153 3.1.Z8
154 treatment half
155 eco 40-60 programme with half load
156 3.1.Z9
157 treatment quarter
158 eco 40-60 programme with quarter load
159 3.1.Z10
160 combined test series
161 combination of test series with different treatments which, collectively, are used to assess the performance
162 3.1.Z13
163 multi-drum washing machine
164 washing machine equipped with more than one drum whether in separate units or in the same casing
165 3.1.Z14
166 multi-drum mode
167 programme where some or all of the drums of a multi-drum washing machine are operated simultaneously
168 Note Z1 to entry: A washing machine with more than one drum for the treatment of the textiles, where drums cannot be
169 operated simultaneously is not regarded as having a multi-drum mode. In this case each drum has to be tested
170 separately.
171 Note Z2 to entry: This definition may apply only for specific programmes. In this case only these programmes can be
172 tested in multi-drum mode.
173 “
174 Add the following terms:
175 “
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176 3.1.Z15
177 simultaneous programme
178 series of operations which are pre-defined within the multi-drum washing machine and which are declared
179 by the manufacturer as suitable for washing certain textile types in two or more drums at the same time
180 3.1.Z16
181 simultaneous cycle
182 complete washing process, started at the same time for two or more drums, as defined by the simultaneous
183 programme selected, consisting of a series of operations (wash, rinse, spin, etc.) and including any
184 operations that occur after the completion of the simultaneous programme
185 Note Z1 to entry: Examples of operations that may occur after the completion of the programme are pumping, monitoring
186 and anti-creasing (where applicable).
187 3.1.Z17
188 combined rated capacity
189 sum of rated capacities of all drums suitable for running a simultaneous programme
190 3.1.Z18
191 combined programme time
192 the time from the simultaneous initiation of the programme for two or more drums (excluding any user
193 programmed delay) until the end of the simultaneous programme
194 Note Z1 to entry: If the end of programme is not indicated, the combined programme time is equal to the combined
195 cycle time.
196 3.1.Z19
197 combined cycle time
198 time from the simultaneous initiation of the programme for two or more drums (excluding any user
199 programmed delay) until all activity ceases
200 Note Z1 to entry: Activity is considered to have ceased when the power consumption reverts to a steady-state condition
201 that persists indefinitely without user intervention. If there is no activity after the end of the programme, the combined
202 cycle time is equal to the combined programme time.
203 Note Z2 to entry: Cycle time includes any activity that may occur after the programme is completed. This could include
204 any electronic activity or any additional mechanical activity that occurs for a limited period after any end of programme
205 indicator. Any cyclic event that occurs indefinitely is considered to be steady-state.
206 3.1.Z20
207 standby mode
208 condition where the test washing machine is connected to the mains and provides only the following
209 functions, which can persist for an indefinite time:
210 (a) reactivation function, or reactivation function and a mere indication of enabled reactivation function; and/or
211 (b) reactivation function through a connection to a network; and/or
212 (c) information or status display; and/or
213 (d) detection function for emergency measures
214 3.1.Z21
215 network
216 communication infrastructure with topology of links, an architecture, including the physical components,
217 organizational principles, communication procedures and formats protocols
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218 3.1.Z22
219 delay start
220 condition where the user has selected a specified delay to the beginning of the cycle of the selected
221 programme
222 3.1.Z23
223 wrinkle guard function
224 operation of the test washing machine after completion of a programme to prevent excessive wrinkle
225 building of the laundry
226 3.1.Z24
227 eco 40-60
228 name of the programme to be able to clean normally soiled cotton laundry declared to be washable at 40 °C
229 or 60 °C, together in the same washing cycle
230 “
231 Replace 3.2.Z1 with the following:
232 “
233 3.2.Z1 Symbols relating to Annex ZA, Annex ZD and Annex ZF
Symbol in Symbol in Unit Clause
this IEC 60456: Description (first
document 2010 appearance)
- - rounding up to full integer values (no decimal ZA.2



places) as defined in EN ISO 80000-2:2019
- - Rounding to nearest integer values (no decimal ZA.2


places) as defined in EN ISO 80000-2:2019
- - Washing Efficiency Index for treatment z (z = full, ZA.5.4
I
Wz,
1/2, 1/4)
A - - weighting factor for the full rated capacity ZA.5.3.2
Asp - A average absorbance ZF.3.2.4
a
Asp - A average net absorbance for test run j ZF.3.2.4
avg,j
Asp - A net absorbance for specimen i ZF.3.2.4
i
Asp - A absorbance reading at 223 nm for specimen i ZF.3.2.4
i,223
Asp - A absorbance reading at 330 nm for specimen i ZF.3.2.4
i,330
Asp - A peak absorbance at wavelength m ZF.3.2.4
m
Asp - A relative peak absorbance at wavelength m ZF.3.2.4
r,m
B - - weighting factor for half of the rated capacity ZA.5.3.2
C - - weighting factor for a quarter of the rated capacity ZA.5.3.2
c - kg rated capacity to calculate the Standard Annual ZA.5.3.2
Energy Consumption of the test washing machine
c - mg/L concentration of the detergent of test run j ZF.3.3.5
j
c - mg/L concentration of Stock 1 solution ZF.5.4
S1
c - mg/L concentration of Stock 2 solution ZF.5.5
S2
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Symbol in
Symbol in Unit Clause
this IEC 60456: Description (first
document 2010 appearance)
cWSS - mg/L detergent concentration of working standard ZF.5
solution
C - - sum of the average reflectance values (Y-values) ZA.5.4
z,i
for treatment z (z = full, 1/2, 1/4) for each test run i
(i = 1, 2, 3, 4)
C - average sum of the reflectance values in each test ZA.5.4
ref
C
ref
run of the reference machine out of all 5 runs
C - - average value for the sum of the reflectance values
z ZA.5.4.
for treatment full, treatment half and treatment
quarter
D - % average value for the remaining moisture content ZA.5.5
for the combined test series
D - % remaining moisture content of test run with half ZA.5.5
1/2,part
load part (part = part A, part B)
D - mg/g mass of detergent recovered per gram of test ZA.3.3.5
j
swatches per test run j
DL - g/kg ratio of mass of detergent per kg of load for the test ZA.6.2
l
run
- g/kg rinsing effectiveness for the combined test ZA.6.2
R
max
series
D - % remaining moisture content of test run i for the ZA.5.5
z,i
treatment z (z = full, 1/2, 1/4)
e - - slope of the detergent concentration curve ZF.3
Energy Efficiency Index of a test washing
EEI - - ZA.5.10
machine
f - - intercept of the detergent concentration curve ZF.3.3.5
i - - test run ZE.5
k - - data logger number ZE.5
L - mg/g ratio of mass of detergent and test swatch j ZF.3.3.5
j
m - - total number of data loggers ZE.5
m - - mass of detergent ZF.5.4
det
m - - mass of transferred Stock 1 solution ZF.5.5
1
m - - mass of transferred Stock 2 solution ZF.5.6
2
m - g weight of test swatch j ZF.3.3.5
j
m - g weight of water in sample j ZF.3.3.5
w,j
M M g mass of the conditioned base load ZA.6.2
M M g mass of detergent used ZA.6.2
det det
M M g mass of base load before each test run (without ZA.6.2
dry dry
test strips)
Mn - kg nominal partial test load mass ZA.2
part
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Symbol in
Symbol in Unit Clause
this IEC 60456: Description (first
document 2010 appearance)
Mpart - g mass of the conditioned half load (part = part A, ZA.5.5
part B)
M - g mass of the half load part (part = part A, part B) at ZA.5.5
r,1/2,part,i
the end of the test run i (i = 1, 2, 3, 4)
M - g mass of base load for treatment z (z = full, 1/4) at ZA.5.5
r,z,i
the end of the test run i (i = 1, 2, 3)
n - - number of pillowcases at rated test load mass ZA.2
PC
n - - number of pillowcases in part A ZA.2
PC,A
n - - number of pillowcases in part B ZA.2
PC,B
n - - number of sheets at rated test load mass ZA.2
SH
n - - number of sheets in part A ZA.2
SH,A
n - - number of sheets in part B ZA.2
SH,B
n - - number of stain test strips in part A ZA.2
STS,A
n - - number of stain test strips in part B ZA.2
STS,B
n - - number of towels at rated test load mass ZA.2
T
n - - number of towels in part A ZA.2
T,A
n - - number of towels in part B ZA.2
T,B
n - - number of test runs for treatment z ZA.5.3
z
part - - half load identifier (part = part A, part B) ZA.5.5
p p kPa laboratory supply water pressure cold ZA.6.2
c c
P - W power consumption in delay start ZD.1
ds
p p kPa laboratory supply water pressure hot (if connected) ZA.6.2
h h
W Power consumption in standby mode in condition ZD.1
P -
ns
of network standby
P - W Power consumption in off mode ZD.1
om
P - W Power consumption in standby mode ZD.1
sm
R - g/kg rinsing effectiveness (average of all test runs) ZF.3.3.5
R - g/kg ratio of mass of detergent of test run j ZF.3.3.5
j
R - g/kg is the average value for rinsing effectiveness for ZA.5.11
1/4
treatment quarter
R - g/kg is the average value for rinsing effectiveness for ZA.5.11
1/2
treatment half
average value for rinsing effectiveness for
Rfull - g/kg ZA.5.11
treatment full
−1
S1/4 - min maximum spin speed for treatment quarter ZA.5.6
−1
S1/2 - min maximum spin speed for treatment half ZA.5.6
SCE - kWh Standard Cycle Energy Consumption ZA.5.10
c
−1
S - min maximum spin speed for treatment full ZA.5.6
full
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Symbol in
Symbol in Unit Clause
this IEC 60456: Description (first
document 2010 appearance)
sz - - standard deviation for treatment z ZA.5.3
s - g/kg standard deviation of the rinsing effectiveness ZA.3.3.5
R
s - g/kg standard deviation of the ratio of mass of detergent
r,j
recovered per gram of test swatch for test run j
−1
S - min maximum spin speed of test run i for treatment z ZA.5.6
z,i
(z = full, 1/2, 1/4)
t t °C ambient temperature (test room) ZA.6.2
a a
t t °C measured average cold water inlet temperature ZA.6.2
c c
t t °C measured average hot water inlet temperature ZA.6.2
h h
t - min average value for the programme time for ZA.5.8
z
treatment z (z = full, 1/2, 1/4)
t - min programme time for test run i for treatment z ZA.5.8
z,i
(z = full, 1/2, 1/4)
ϑ - °C total average maximum temperature for each ZE.5
max,z
treatment z (z = full, 1/2, 1/4)
ϑmax,z,i - °C average maximum temperature for the test run i ZE.5
with treatment z (z = full, 1/2, 1/4)
ϑ - °C maximum temperature for the data logger k (k = 1, ZE.5
max,z,i,k
2, 3) for test run i (i = 1, 2, 3, 4) for the treatment z
(z = full, 1/2, 1/4)
- L weighted average value for the total water ZA.5.7
V
consumption for the combined test series
V1/4 - L water consumption for treatment with quarter load ZA.5.7
V1/2 - L water consumption for treatment with half load ZA.5.7
V V L volume of cold water used during the main wash ZA.6.2
cm cm
V V L volume of cold water used in the test run ZA.6.2
ct ct
V - L water consumption for treatment with full load ZA.5.7
full
volume of supply hot water used during the main
V L ZA.6.2
hm
V
hm
wash
V V L volume of supply hot water used in the test run ZA.6.2
ht ht
V V L water consumption during the main wash ZA.6.2
m m
V - L water consumption for treatment z (z = full, 1/2, ZA.5.7
z
1/4)
Vz,i - L water consumption for test run i for treatment z ZA.5.7
(z = full, 1/2, 1/4)
...