SCHEDULES
SCHEDULE 7Measurement methods and calculations for household dishwashers
General conditions1
1
Sub-paragraphs (2) to (4) apply for the purposes of the measurements and calculations referred to in paragraphs 2 to 5.
2
The eco programme at rated capacity must be used for the measurement and calculation of the Energy Efficiency Index (EEI), water consumption, programme duration, cleaning and drying performance of a household dishwasher model.
3
The energy consumption, water consumption, programme duration, cleaning and drying performance must be measured concurrently.
4
In this Schedule—
a
the EPWC is expressed in litres per cycle and rounded to one decimal place;
b
the duration of the eco programme (Tt) is expressed in hours and minutes and rounded to the nearest minute.
Energy efficiency index2
1
The EEI is determined as follows.
2
For all household dishwasher models, the EEI is calculated by comparing the eco programme energy consumption at rated capacity (“EPEC”) of the dishwasher to its standard programme energy consumption (“SPEC”).
3
The EEI must be rounded to one decimal place and is calculated as follows—
EEI = (EPEC/SPEC) × 100.
4
For the purposes of sub-paragraph (3)—
a
EPEC and SPEC are measured in kWh/cycle and rounded to three decimal places;
b
SPEC is calculated as follows—
i
for household dishwashers with rated capacity ps ≥ 10 and width > 50 cm—
SPEC = 0.025 × ps + 1.350;
ii
for household dishwashers with rated capacity ps ≤ 9 or width ≤ 50 cm—
SPEC = 0.090 × ps + 0.450;
where ps is the number of place settings.
Cleaning performance index3
1
The cleaning performance index (“IC”) is determined as follows.
2
For all household dishwasher models, the IC is calculated by comparing the cleaning performance of the eco programme to the cleaning performance of a reference dishwasher.
3
The IC must be rounded to three decimal places and is calculated as follows—
IC = exp (ln IC) and
n IC = (1/n) × Σni=1 ln(CT,i/CR,i).
4
For the purposes of sub-paragraph (3)—
a
CT,I is the cleaning performance of the eco programme of the household dishwasher under test for one test run (i) , rounded to three decimal places;
b
CR,i is the cleaning performance of the reference dishwasher for one test run (i), rounded to three decimal places;
c
n is the number of test runs.
Drying performance index4
1
The drying performance index (“ID”) is determined as follows.
2
For all household dishwasher models, the ID is calculated by comparing the drying performance of the eco programme to the drying performance of a reference dishwasher.
3
The ID must be rounded to three decimal places and is calculated as follows—
ID = exp (ln ID) and
ln ID = (1/n) × Σni=1 ln(ID,i).
4
For the purposes of sub-paragraph (3)—
a
ID,i is the drying performance index of the eco programme of the household dishwasher under test for one test run (i);
b
n is the number of combined cleaning and drying test runs;
c
the ID,i is rounded to three decimal places and calculated as follows—
ln ID,i = ln (DT,i/DR,t), where—
i
DT,i is the average drying performance score of the eco programme of the household dishwasher under test for one test run (i), rounded to three decimal places;
ii
DR,t is the target drying score of the reference dishwasher, rounded to three decimal places.
Low power modes5
1
Where applicable the power consumption of the off mode (Po), standby mode (Psm) and delay start (Pds) must be measured.
2
The measured values must be expressed in W and rounded to two decimal places.
3
During measurements of the power consumption in low power modes, the following must be checked and recorded—
a
the display (or not) of information; and
b
the activation (or not) of a network connection.