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Federal Register / Vol. 86, No. 167 / Wednesday, September 1, 2021 / Proposed Rules
TABLE 3.4.2SYMBOL DEFINITIONS AND CALCULATION OF MEASURED VALUES FOR SEMI-AUTOMATIC CLOTHES WASHER
TEST CYCLES
Temperature selection Hot
Warm

Load size Large Small Large Small

Bone-dry weight
Hot water
Cold water
Electrical energy
Cycle time
Cycle complete weight
WIhL = WIcL
WIhS = WIcS ..
WIwL = WIcL ..
WIwS = WIcS

HhL = CcL
HhS = CcS
HwL = CcL 2
HwS = CcS 2

CwL = CcL 2
CwS = CcS 2

EhL = EcL
EhS = EcS
EwL = EcL
EwS = EcS

ThL = TcL
ThS = TcS
TwL = TcL
TwS = TcS

WChL = WCcL
WChS = WCcS
WCwL = WCcL
WCwS = WCcS

3.5 Combined low-power mode power.
Connect the clothes washer to a watt meter as specified in section 2.5.3 of this appendix.
Establish the testing conditions set forth in sections 2.1, 2.4, and 2.10.2 of this appendix.
3.5.1 Perform combined low-power mode testing after completion of an active mode wash cycle included as part of the energy test cycle; after removing the test load; without changing the control panel settings used for the active mode wash cycle; with the door closed; and without disconnecting the electrical energy supply to the clothes washer between completion of the active mode wash cycle and the start of combined low-power mode testing.
3.5.2 For a clothes washer that takes some time to automatically enter a stable inactive mode or off mode state from a higher power state as discussed in Section 5, Paragraph 5.1, note 1 of IEC 62301 incorporated by reference; see 430.3, allow sufficient time for the clothes washer to automatically reach the default inactive/off mode state before proceeding with the test measurement.
3.5.3 Once the stable inactive/off mode state has been reached, measure and record the default inactive/off mode power, Pdefault, in watts, following the test procedure for the sampling method specified in Section 5, Paragraph 5.3.2 of IEC 62301.
3.5.4 For a clothes washer with a switch, dial, or button that can be optionally selected by the end user to achieve a lower-power inactive/off mode state than the default inactive/off mode state measured in section 3.5.3 of this appendix, after performing the measurement in section 3.5.3 of this appendix, activate the switch, dial, or button
to the position resulting in the lowest power consumption and repeat the measurement procedure described in section 3.5.3 of this appendix. Measure and record the lowestpower inactive/off mode power, Plowest, in Watts.
3.6 Energy consumption for the purpose of determining the cycle selections to be included in the energy test cycle. This section is implemented only in cases where the energy test cycle flowcharts in section 2.12.1
of this appendix require the determination of the wash/rinse temperature selection with the highest energy consumption.
3.6.1 For the wash/rinse temperature selection being considered under this section, establish the testing conditions set forth in section 2 of this appendix. Select the applicable cycle selection and wash/rinse temperature selection. For all wash/rinse temperature selections, select the cycle settings as described in section 3.2 of this appendix.
3.6.2 Measure each wash cycles electrical energy consumption EL and hot water consumption HL. Calculate the total energy consumption for each cycle selection ETL, as follows:
ETL = EL + HL T K
Where:
EL is the electrical energy consumption, expressed in kilowatt-hours per cycle.
HL is the hot water consumption, expressed in gallons per cycle.
T = nominal temperature rise = 65 F 36.1
C.

K = Water specific heat in kilowatt-hours per gallon per degree F = 0.00240 kWh/galF 0.00114 kWh/L-C.
4. Calculation of Derived Results From Test Measurements 4.1 Hot water and machine electrical energy consumption of clothes washers.
4.1.1 Per-cycle temperature-weighted hot water consumption for all load sizes tested.
Calculate the per-cycle temperature-weighted hot water consumption for the large test load size, VhL, and the small test load size, VhS, expressed in gallons per cycle or liters per cycle and defined as:
a VhL = HxL TUFx + HhL TUFh +
HwL TUFw + HwwL TUFww + HcL
TUFc b VhS = HxS TUFx + HhS TUFh +
HwS TUFw + HwwS TUFww + HcS
TUFc Where:
HxL, HhL, HwL, HwwL, HcL, HxS, HhS, HwS, HwwS, and HcS are the hot water consumption values, in gallons per-cycle or liters per cycle as measured in section 3.3 of this appendix for automatic clothes washers or section 3.4
of this appendix for semi-automatic clothes washers.
TUFx, TUFh, TUFw, TUFww, and TUFc are temperature use factors for Extra-Hot Wash/Cold Rinse, Hot Wash/Cold Rinse, Warm Wash/Cold Rinse, Warm Wash/
Warm Rinse, and Cold Wash/Cold Rinse temperature selections, respectively, as defined in Table 4.1.1 of this appendix.

TABLE 4.1.1TEMPERATURE USE FACTORS

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Clothes washers with cold rinse only
Clothes washers with both cold and warm rinse
Wash/rinse temperature selections available in the energy test cycle
C/C

H/C
C/C

H/C
W/C
C/C

XH/C
H/C
C/C

XH/C
H/C
W/C
C/C

HC/C
W/C
W/W
C/C

XH/C
H/C
W/W
C/C

TUFx Extra-Hot/Cold
TUFh Hot/Cold
TUFw Warm/Cold
TUFww Warm/Warm
TUFc Cold/Cold

1.00

0.63

0.37

0.14
0.49
0.37

0.14
0.49

0.37

0.05
0.09
0.49
0.37

0.14
0.22
0.27
0.37

0.14
0.22
0.27
0.37

XH/C
H/C
W/C
W/W
C/C
0.05
0.09
0.22
0.27
0.37

This column applies to all semi-automatic clothes washers.
On clothes washers with only two wash temperature selections <140 F, the higher of the two wash temperatures is classified as a Hot Wash/Cold Rinse, in accordance with the wash/rinse temperature definitions within the energy test cycle.

4.1.2 Total per-cycle hot water energy consumption for all load sizes tested.
Calculate the total per-cycle hot water energy consumption for the large test load size, HEL,
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and the small test load size, HES, expressed in kilowatt-hours per cycle and defined as:
a HEL = VhL T K = Total energy when the large test load is tested.

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b HES = VhS T K = Total energy when the small test load is tested.
Where:

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