Appendix J2 to Subpart B of Part 430 - Uniform Test Method for Measuring the Energy Consumption of Automatic and Semi-automatic Clothes Washers
10:3.0.1.4.18.2.13.6.19 : Appendix J2
Appendix J2 to Subpart B of Part 430 - Uniform Test Method for
Measuring the Energy Consumption of Automatic and Semi-automatic
Clothes Washers Note:
Any representation related to the energy or water consumption of
residential clothes washers must be based upon results generated
using Appendix J2. Specifically, before February 1, 2016,
representations must be based upon results generated either under
this appendix or under Appendix J2 as it appeared in the 10 CFR
parts 200-499 edition revised as of January 1, 2015. Any
representations made on or after February 1, 2016 must be made
based upon results generated using this appendix.
Before January 1, 2018, any representation related to the energy
or water consumption of commercial clothes washers must be based on
results generated using Appendix J1. Any representations made on or
after January 1, 2018, must be based upon results generated using
Appendix J2.
1. Definitions and Symbols
1.1 Active mode means a mode in which the clothes washer
is connected to a mains power source, has been activated, and is
performing one or more of the main functions of washing, soaking,
tumbling, agitating, rinsing, and/or removing water from the
clothing, or is involved in functions necessary for these main
functions, such as admitting water into the washer or pumping water
out of the washer. Active mode also includes delay start and cycle
finished modes.
1.2 Active washing mode means a mode in which the clothes
washer is performing any of the operations included in a complete
cycle intended for washing a clothing load, including the main
functions of washing, soaking, tumbling, agitating, rinsing, and/or
removing water from the clothing.
1.3 Adaptive control system means a clothes washer
control system, other than an adaptive water fill control system,
that is capable of automatically adjusting washer operation or
washing conditions based on characteristics of the clothes load
placed in the clothes container, without allowing or requiring user
intervention or actions. The automatic adjustments may, for
example, include automatic selection, modification, or control of
any of the following: wash water temperature, agitation or tumble
cycle time, number of rinse cycles, or spin speed. The
characteristics of the clothes load, which could trigger such
adjustments, could, for example, consist of or be indicated by the
presence of either soil, soap, suds, or any other additive
laundering substitute or complementary product.
1.4 Adaptive water fill control system means a clothes
washer automatic water fill control system that is capable of
automatically adjusting the water fill level based on the size or
weight of the clothes load placed in the clothes container.
1.5 Automatic water fill control system means a clothes
washer water fill control system that does not allow or require the
user to determine or select the water fill level, and includes
adaptive water fill control systems and fixed water fill control
systems.
1.6 Bone-dry means a condition of a load of test cloth
that has been dried in a dryer at maximum temperature for a minimum
of 10 minutes, removed and weighed before cool down, and then dried
again for 10 minute periods until the final weight change of the
load is 1 percent or less.
1.7 Clothes container means the compartment within the
clothes washer that holds the clothes during the operation of the
machine.
1.8 Cold rinse means the coldest rinse temperature
available on the machine, as indicated to the user on the clothes
washer control panel.
1.9 Combined low-power mode means the aggregate of
available modes other than active washing mode, including inactive
mode, off mode, delay start mode, and cycle finished mode.
1.10 Compact means a clothes washer that has a clothes
container capacity of less than 1.6 ft 3 (45 L).
1.11 Cycle finished mode means an active mode that
provides continuous status display, intermittent tumbling, or air
circulation following operation in active washing mode.
1.12 Delay start mode means an active mode in which
activation of active washing mode is facilitated by a timer.
1.13 Energy test cycle means the complete set of
wash/rinse temperature selections required for testing, as
determined according to section 2.12. Within the energy test cycle,
the following definitions apply:
(a) Cold Wash/Cold Rinse is the wash/rinse temperature
selection determined by evaluating the flowchart in Figure 2.12.1
of this appendix.
(b) Hot Wash/Cold Rinse is the wash/rinse temperature
selection determined by evaluating the flowchart in Figure 2.12.2
of this appendix.
(c) Warm Wash/Cold Rinse is the wash/rinse temperature
selection determined by evaluating the flowchart in Figure 2.12.3
of this appendix.
(d) Warm Wash/Warm Rinse is the wash/rinse temperature
selection determined by evaluating the flowchart in Figure 2.12.4
of this appendix.
(e) Extra-Hot Wash/Cold Rinse is the wash/rinse
temperature selection determined by evaluating the flowchart in
Figure 2.12.5 of this appendix.
1.14 Fixed water fill control system means a clothes
washer automatic water fill control system that automatically
terminates the fill when the water reaches an appropriate level in
the clothes container.
1.15 IEC 62301 means the test standard published by the
International Electrotechnical Commission, entitled “Household
electrical appliances - Measurement of standby power,” Publication
62301, Edition 2.0 2011-01 (incorporated by reference; see §
430.3).
1.16 Inactive mode means a standby mode that facilitates
the activation of active mode by remote switch (including remote
control), internal sensor, or timer, or that provides continuous
status display.
1.17 Integrated modified energy factor means the quotient
of the cubic foot (or liter) capacity of the clothes container
divided by the total clothes washer energy consumption per cycle,
with such energy consumption expressed as the sum of:
(a) The machine electrical energy consumption;
(b) The hot water energy consumption;
(c) The energy required for removal of the remaining moisture in
the wash load; and
(d) The combined low-power mode energy consumption.
1.18 Integrated water factor means the quotient of the
total weighted per-cycle water consumption for all wash cycles in
gallons divided by the cubic foot (or liter) capacity of the
clothes washer.
1.19 Load usage factor means the percentage of the total
number of wash loads that a user would wash a particular size
(weight) load.
1.20 Lot means a quantity of cloth that has been
manufactured with the same batches of cotton and polyester during
one continuous process.
1.21 Manual control system means a clothes washer control
system that requires that the user make the choices that determine
washer operation or washing conditions, such as, for example,
wash/rinse temperature selections and wash time, before starting
the cycle.
1.22 Manual water fill control system means a clothes
washer water fill control system that requires the user to
determine or select the water fill level.
1.23 Modified energy factor means the quotient of the
cubic foot (or liter) capacity of the clothes container divided by
the total clothes washer energy consumption per cycle, with such
energy consumption expressed as the sum of the machine electrical
energy consumption, the hot water energy consumption, and the
energy required for removal of the remaining moisture in the wash
load.
1.24 Non-water-heating clothes washer means a clothes
washer that does not have an internal water heating device to
generate hot water.
1.25 Normal cycle means the cycle recommended by the
manufacturer (considering manufacturer instructions, control panel
labeling, and other markings on the clothes washer) for normal,
regular, or typical use for washing up to a full load of
normally-soiled cotton clothing. For machines where multiple cycle
settings are recommended by the manufacturer for normal, regular,
or typical use for washing up to a full load of normally-soiled
cotton clothing, then the Normal cycle is the cycle selection that
results in the lowest IMEF or MEF value.
1.26 Off mode means a mode in which the clothes washer is
connected to a mains power source and is not providing any active
or standby mode function, and where the mode may persist for an
indefinite time.
1.27 Roll means a subset of a lot.
1.28 Standard means a clothes washer that has a clothes
container capacity of 1.6 ft 3 (45 L) or greater.
1.29 Standby mode means any mode in which the clothes
washer is connected to a mains power source and offers one or more
of the following user oriented or protective functions that may
persist for an indefinite time:
(a) Facilitating the activation of other modes (including
activation or deactivation of active mode) by remote switch
(including remote control), internal sensor, or timer;
(b) Continuous functions, including information or status
displays (including clocks) or sensor-based functions.
A timer is a continuous clock function (which may or may not be
associated with a display) that provides regular scheduled tasks
(e.g., switching) and that operates on a continuous
basis.
1.30 Symbol usage. The following identity relationships
are provided to help clarify the symbology used throughout this
procedure.
C - Capacity C (with subscripts) - Cold Water Consumption D -
Energy Consumption for Removal of Moisture from Test Load E -
Electrical Energy Consumption F - Load Usage Factor H - Hot Water
Consumption HE - Hot Water Energy Consumption ME - Machine
Electrical Energy Consumption P - Power Q - Water Consumption RMC -
Remaining Moisture Content S - Annual Hours TUF - Temperature Use
Factor V - Temperature-Weighted Hot Water Consumption W - Mass of
Water WC - Weight of Test Load After Extraction WI - Initial Weight
of Dry Test Load Subscripts: a or avg - Average Test Load c - Cold
Wash (minimum wash temp.) corr - Corrected (RMC values) h - Hot
Wash (maximum wash temp. ≤135 °F (57.2 °C)) ia - Inactive Mode LP -
Combined Low-Power Mode m - Extra-Hot Wash (maximum wash temp.
>135 °F (57.2 °C)) n - Minimum Test Load o - Off Mode oi -
Combined Off and Inactive Modes T - Total w - Warm Wash ww - Warm
Wash/Warm Rinse x - Maximum Test Load
The following examples are provided to show how the above
symbols can be used to define variables:
EmX = “Electrical Energy Consumption” for an “Extra-Hot Wash” and
“Maximum Test Load” HEmin = “Hot Water Energy Consumption” for the
“Minimum Test Load” Qhmin = “Water Consumption” for a “Hot Wash”
and “Minimum Test Load” TUFm = “Temperature Use Factor” for an
“Extra-Hot Wash”
1.31 Temperature use factor means, for a particular
wash/rinse temperature setting, the percentage of the total number
of wash loads that an average user would wash with that
setting.
1.32 Thermostatically controlled water valves means
clothes washer controls that have the ability to sense and adjust
the hot and cold supply water.
1.33 Water factor means the quotient of the total
weighted per-cycle water consumption for cold wash divided by the
cubic foot (or liter) capacity of the clothes washer.
1.34 Water-heating clothes washer means a clothes washer
where some or all of the hot water for clothes washing is generated
by a water heating device internal to the clothes washer.
2. Testing Conditions
2.1 Electrical energy supply.
2.1.1 Supply voltage and frequency. Maintain the
electrical supply at the clothes washer terminal block within 2
percent of 120, 120/240, or 120/208Y volts as applicable to the
particular terminal block wiring system and within 2 percent of the
nameplate frequency as specified by the manufacturer. If the
clothes washer has a dual voltage conversion capability, conduct
test at the highest voltage specified by the manufacturer.
2.1.2 Supply voltage waveform. For the combined low-power
mode testing, maintain the electrical supply voltage waveform
indicated in Section 4, Paragraph 4.3.2 of IEC 62301. If the power
measuring instrument used for testing is unable to measure and
record the total harmonic content during the test measurement
period, total harmonic content may be measured and recorded
immediately before and after the test measurement period.
2.2 Supply water. Maintain the temperature of the hot
water supply at the water inlets between 130 °F (54.4 °C) and 135
°F (57.2 °C), using 135 °F as the target temperature. Maintain the
temperature of the cold water supply at the water inlets between 55
°F (12.8 °C) and 60 °F (15.6 °C), using 60 °F as the target
temperature.
2.3 Water pressure. Maintain the static water pressure at
the hot and cold water inlet connection of the clothes washer at 35
pounds per square inch gauge (psig) ± 2.5 psig (241.3 kPa ± 17.2
kPa) when the water is flowing.
2.4 Test room temperature. For all clothes washers,
maintain the test room ambient air temperature at 75 ± 5 °F (23.9 ±
2.8 °C) for active mode testing and combined low-power mode
testing. Do not use the test room ambient air temperature
conditions specified in Section 4, Paragraph 4.2 of IEC 62301 for
combined low-power mode testing.
2.5 Instrumentation. Perform all test measurements using
the following instruments, as appropriate:
2.5.1 Weighing scales.
2.5.1.1 Weighing scale for test cloth. The scale used for
weighing test cloth must have a resolution of no larger than 0.2 oz
(5.7 g) and a maximum error no greater than 0.3 percent of the
measured value.
2.5.1.2 Weighing scale for clothes container capacity
measurement. The scale used for performing the clothes
container capacity measurement must have a resolution no larger
than 0.50 lbs (0.23 kg) and a maximum error no greater than 0.5
percent of the measured value.
2.5.2 Watt-hour meter. The watt-hour meter used to
measure electrical energy consumption must have a resolution no
larger than 1 Wh (3.6 kJ) and a maximum error no greater than 2
percent of the measured value for any demand greater than 50 Wh
(180.0 kJ).
2.5.3 Watt meter. The watt meter used to measure combined
low-power mode power consumption must comply with the requirements
specified in Section 4, Paragraph 4.4 of IEC 62301 (incorporated by
reference, see § 430.3). If the power measuring instrument used for
testing is unable to measure and record the crest factor, power
factor, or maximum current ratio during the test measurement
period, the crest factor, power factor, and maximum current ratio
may be measured and recorded immediately before and after the test
measurement period.
2.5.4 Water and air temperature measuring devices. The
temperature devices used to measure water and air temperature must
have an error no greater than ±1 °F (±0.6 °C) over the range being
measured.
2.5.5 Water meter. A water meter must be installed in
both the hot and cold water lines to measure water flow and/or
water consumption. The water meters must have a resolution no
larger than 0.1 gallons (0.4 liters) and a maximum error no greater
than 2 percent for the water flow rates being measured.
2.5.6 Water pressure gauge. A water pressure gauge must
be installed in both the hot and cold water lines to measure water
pressure. The water pressure gauges must have a resolution of 1
pound per square inch gauge (psig) (6.9 kPa) and a maximum error no
greater than 5 percent of any measured value.
2.6 Bone dryer temperature. The dryer used for bone
drying must heat the test cloth load above 210 °F (99 °C).
2.7 Test cloths.
2.7.1 Energy test cloth. The energy test cloth must be
made from energy test cloth material, as specified in section 2.7.4
of this Appendix, that is 24 ± 1/2 inches by 36 ± 1/2 inches (61.0
± 1.3 cm by 91.4 ± 1.3 cm) and has been hemmed to 22 ± 1/2 inches
by 34 ± 1/2 inches (55.9 ± 1.3 cm by 86.4 ± 1.3 cm) before washing.
The energy test cloth must be clean and must not be used for more
than 60 test runs (after preconditioning as specified in 2.7.3 of
this appendix). All energy test cloth must be permanently marked
identifying the lot number of the material. Mixed lots of material
must not be used for testing a clothes washer.
2.7.2 Energy stuffer cloth. The energy stuffer cloth must
be made from energy test cloth material, as specified in section
2.7.4 of this Appendix, that is 12 ± 1/4 inches by 12 ± 1/4inches
(30.5 ± 0.6 cm by 30.5 ± 0.6 cm) and has been hemmed to 10 ± 1/4
inches by 10 ± 1/4 inches (25.4 ± 0.6 cm by 25.4 ± 0.6 cm) before
washing. The energy stuffer cloth must be clean and must not be
used for more than 60 test runs (after preconditioning as specified
in section 2.7.3 of this Appendix). All energy stuffer cloth must
be permanently marked identifying the lot number of the material.
Mixed lots of material must not be used for testing a clothes
washer.
2.7.3 Preconditioning of test cloths. The new test
cloths, including energy test cloths and energy stuffer cloths,
must be pre-conditioned in a clothes washer in the following
manner:
Perform five complete wash-rinse-spin cycles, the first two with
AHAM Standard Detergent Formula 3 and the last three without
detergent. Place the test cloth in a clothes washer set at the
maximum water level. Wash the load for ten minutes in soft water
(17 ppm hardness or less) using 27.0 grams + 4.0 grams per pound of
cloth load of AHAM Standard detergent Formula 3. The wash
temperature is to be controlled to 135 °F ± 5 °F (57.2 °C ± 2.8 °C)
and the rinse temperature is to be controlled to 60 °F ±5 °F (15.6
°C ± 2.8 °C). Repeat the cycle with detergent and then repeat the
cycle three additional times without detergent, bone drying the
load between cycles (for a total of five complete wash-rinse-spin
cycles).
2.7.4 Energy test cloth material. The energy test cloths
and energy stuffer cloths must be made from fabric meeting the
following specifications:
2.7.4.1 The test cloth material should come from a roll of
material with a width of approximately 63 inches and approximately
500 yards per roll. However, other sizes may be used if the test
cloth material meets the specifications listed in sections 2.7.4.2
through 2.7.4.7.
2.7.4.2 Nominal fabric type. Pure finished bleached cloth
made with a momie or granite weave, which is nominally 50 percent
cotton and 50 percent polyester.
2.7.4.4 Thread count. 65 × 57 per inch (warp × fill), ±2
percent.
2.7.4.5 Fiber content of warp and filling yarn. 50
percent ±4 percent cotton, with the balance being polyester, open
end spun, 15/1 ±5 percent cotton count blended yarn.
2.7.4.6 Water repellent finishes, such as fluoropolymer stain
resistant finishes, must not be applied to the test cloth. Verify
the absence of such finishes using both of the following:
2.7.4.6.1 AATCC Test Method 118-2007 (incorporated by reference;
see § 430.3) for each new lot of test cloth (when purchased from
the mill) to confirm the absence of ScotchguardTM or other water
repellent finish (required scores of “D” across the board).
2.7.4.6.2 AATCC Test Method 79-2010 (incorporated by reference;
see § 430.3) for each new lot of test cloth (when purchased from
the mill) to confirm the absence of ScotchguardTM or other water
repellent finish (time to absorb one drop should be on the order of
1 second).
2.7.4.7 The maximum shrinkage after preconditioning must not be
more than 5 percent of the length and width. Measure per AATCC Test
Method 135-2010 (incorporated by reference; see § 430.3).
2.7.5 The moisture absorption and retention must be evaluated
for each new lot of test cloth using the standard extractor
Remaining Moisture Content (RMC) procedure specified in Appendix J3
to 10 CFR part 430 subpart B.
2.8 Test load sizes. Use Table 5.1 of this appendix to
determine the maximum, minimum, and, when required, average test
load sizes based on the clothes container capacity as measured in
section 3.1 of this appendix. Test loads must consist of energy
test cloths and no more than five energy stuffer clothes per load
to achieve the proper weight.
Use the test load sizes and corresponding water fill settings
defined in Table 2.8 of this appendix when measuring water and
energy consumption. Use only the maximum test load size when
measuring RMC.
Table 2.8 - Required Test Load Siszes and
Water Fill Settings
Water fill control system
type
Test load size
Water fill setting
Manual water fill
control system
Max
Min
Max.
Min.
Automatic water
fill control system
Max
Avg
Min
As determined by the clothes
washer.
2.9 Use of test loads.
2.9.1 Test loads for energy and water consumption measurements
must be bone dry prior to the first cycle of the test, and dried to
a maximum of 104 percent of bone dry weight for subsequent
testing.
2.9.2 Prepare the energy test cloths for loading by grasping
them in the center, lifting, and shaking them to hang loosely, as
illustrated in Figure 2.9.2 of this appendix.
For all clothes washers, follow any manufacturer loading
instructions provided to the user regarding the placement of
clothing within the clothes container. In the absence of any
manufacturer instructions regarding the placement of clothing
within the clothes container, the following loading instructions
apply.
2.9.2.1 To load the energy test cloths in a top-loading clothes
washer, arrange the cloths circumferentially around the axis of
rotation of the clothes container, using alternating lengthwise
orientations for adjacent pieces of cloth. Complete each cloth
layer across its horizontal plane within the clothes container
before adding a new layer. Figure 2.9.2.1 of this appendix
illustrates the correct loading technique for a vertical-axis
clothes washer.
2.9.2.2 To load the energy test cloths in a front-loading
clothes washer, grasp each test cloth in the center as indicted in
section 2.9.2 of this appendix, and then place each cloth into the
clothes container prior to activating the clothes washer.
2.10 Clothes washer installation. Install the clothes
washer in accordance with manufacturer's instructions. For combined
low-power mode testing, install the clothes washer in accordance
with Section 5, Paragraph 5.2 of IEC 62301 (incorporated by
reference; see § 430.3), disregarding the provisions regarding
batteries and the determination, classification, and testing of
relevant modes.
2.11 Clothes washer pre-conditioning.
2.11.1 Non-water-heating clothes washer. If the clothes
washer has not been filled with water in the preceding 96 hours,
pre-condition it by running it through a cold rinse cycle and then
draining it to ensure that the hose, pump, and sump are filled with
water.
2.11.2 Water-heating clothes washer. If the clothes
washer has not been filled with water in the preceding 96 hours, or
if it has not been in the test room at the specified ambient
conditions for 8 hours, pre-condition it by running it through a
cold rinse cycle and then draining it to ensure that the hose,
pump, and sump are filled with water.
2.12 Determining the energy test cycle. To determine the
energy test cycle, evaluate the wash/rinse temperature selection
flowcharts in the order in which they are presented in this
section. The determination of the energy test cycle must take into
consideration all cycle settings available to the end user,
including any cycle selections or cycle modifications provided by
the manufacturer via software or firmware updates to the product,
for the basic model under test. The energy test cycle does not
include any cycle that is recommended by the manufacturer
exclusively for cleaning, deodorizing, or sanitizing the clothes
washer.
3. Test
Measurements
3.1 Clothes container capacity. Measure the entire volume
that a clothes load could occupy within the clothes container
during active mode washer operation according to the following
procedures:
3.1.1 Place the clothes washer in such a position that the
uppermost edge of the clothes container opening is leveled
horizontally, so that the container will hold the maximum amount of
water. For front-loading clothes washers, the door seal and
shipping bolts or other forms of bracing hardware to support the
wash drum during shipping must remain in place during the capacity
measurement.
If the design of a front-loading clothes washer does not include
shipping bolts or other forms of bracing hardware to support the
wash drum during shipping, a laboratory may support the wash drum
by other means, including temporary bracing or support beams. Any
temporary bracing or support beams must keep the wash drum in a
fixed position, relative to the geometry of the door and door seal
components, that is representative of the position of the wash drum
during normal operation. The method used must avoid damage to the
unit that would affect the results of the energy and water
testing.
For a front-loading clothes washer that does not include
shipping bolts or other forms of bracing hardware to support the
wash drum during shipping, the laboratory must fully document the
alternative method used to support the wash drum during capacity
measurement, include such documentation in the final test report,
and pursuant to § 429.71 of this chapter, the manufacturer must
retain such documentation as part its test records.
3.1.2 Line the inside of the clothes container with a 2 mil
thickness (0.051 mm) plastic bag. All clothes washer components
that occupy space within the clothes container and that are
recommended for use during a wash cycle must be in place and must
be lined with a 2 mil thickness (0.051 mm) plastic bag to prevent
water from entering any void space.
3.1.3 Record the total weight of the machine before adding
water.
3.1.4 Fill the clothes container manually with either 60 °F ± 5
°F (15.6 °C ± 2.8 °C) or 100 °F ± 10 °F (37.8 °C ± 5.5 °C) water,
with the door open. For a top-loading vertical-axis clothes washer,
fill the clothes container to the uppermost edge of the rotating
portion, including any balance ring. Figure 3.1.4.1 of this
appendix illustrates the maximum fill level for top-loading clothes
washers.
For a front-loading horizontal-axis clothes washer, fill the
clothes container to the highest point of contact between the door
and the door gasket. If any portion of the door or gasket would
occupy the measured volume space when the door is closed, exclude
from the measurement the volume that the door or gasket portion
would occupy. For a front-loading horizontal-axis clothes washer
with a concave door shape, include any additional volume above the
plane defined by the highest point of contact between the door and
the door gasket, if that area can be occupied by clothing during
washer operation. For a top-loading horizontal-axis clothes washer,
include any additional volume above the plane of the door hinge
that clothing could occupy during washer operation. Figure 3.1.4.2
of this appendix illustrates the maximum fill volumes for all
horizontal-axis clothes washer types.
For all clothes washers, exclude any volume that cannot be
occupied by the clothing load during operation.
3.1.5 Measure and record the weight of water, W, in pounds.
3.1.6 Calculate the clothes container capacity as follows:
C = W/d where: C = Capacity in cubic feet (liters). W = Mass of
water in pounds (kilograms). d = Density of water (62.0 lbs/ft 3
for 100 °F (993 kg/m 3 for 37.8 °C) or 62.3 lbs/ft 3 for 60 °F (998
kg/m 3 for 15.6 °C)).
3.1.7 Calculate the clothes container capacity, C, to the
nearest 0.01 cubic foot for the purpose of determining test load
sizes per Table 5.1 of this appendix and for all subsequent
calculations that include the clothes container capacity.
3.2 Procedure for measuring water and energy consumption
values on all automatic and semi-automatic washers.
3.2.1 Perform all energy consumption tests under the energy test
cycle.
3.2.2 Perform the test sections listed in Table 3.2.2 in
accordance with the wash/rinse temperature selections available in
the energy test cycle.
Table 3.2.2 - Test Section Reference
Wash/rinse temperature
selections available in the
energy test cycle
Corresponding test
section
reference
Extra-Hot/Cold
3.3
Hot/Cold
3.4
Warm/Cold
3.5
Warm/Warm
3.6
Cold/Cold
3.7
Test
Sections Applicable to all Clothes Washers
Remaining Moisture
Content
3.8
Combined Low-Power
Mode Power
3.9
3.2.3 Hot and cold water faucets.
3.2.3.1 For automatic clothes washers, open both the hot and
cold water faucets.
3.2.3.2 For semi-automatic washers:
(1) For hot inlet water temperature, open the hot water faucet
completely and close the cold water faucet;
(2) For warm inlet water temperature, open both hot and cold
water faucets completely;
(3) For cold inlet water temperature, close the hot water faucet
and open the cold water faucet completely.
3.2.4 Wash/rinse temperature selection. Set the
wash/rinse temperature selection control to obtain the desired
wash/rinse temperature selection within the energy test cycle.
3.2.5 Wash time setting. If one wash time is prescribed
for the wash cycle under test, that shall be the wash time setting;
otherwise, the wash time setting shall be the higher of either the
minimum or 70 percent of the maximum wash time available for the
wash cycle under test, regardless of the labeling of suggested dial
locations. If 70% of the maximum wash time is not available on a
dial with a discreet number of wash time settings, choose the
next-highest setting greater than 70%. If the clothes washer is
equipped with an electromechanical dial controlling wash time,
reset the dial to the minimum wash time and then turn it in the
direction of increasing wash time to reach the appropriate setting.
If the appropriate setting is passed, return the dial to the
minimum wash time and then turn in the direction of increasing wash
time until the appropriate setting is reached.
3.2.6 Water fill levels.
3.2.6.1 Clothes washers with manual water fill control
system. Set the water fill selector to the maximum water level
available for the wash cycle under test for the maximum test load
size and the minimum water level available for the wash cycle under
test for the minimum test load size.
3.2.6.2 Clothes washers with automatic water fill control
system.
3.2.6.2.1 Not user adjustable. The maximum, minimum, and
average water levels as described in the following sections refer
to the amount of water fill that is automatically selected by the
control system when the respective test loads are used.
3.2.6.2.2 User adjustable. Conduct four tests on clothes
washers with user adjustable automatic water fill controls that
affect the relative wash water levels. Conduct the first test using
the maximum test load and with the automatic water fill control
system set in the setting that will give the most energy intensive
result. Conduct the second test using the minimum test load and
with the automatic water fill control system set in the setting
that will give the least energy intensive result. Conduct the third
test using the average test load and with the automatic water fill
control system set in the setting that will give the most energy
intensive result for the given test load. Conduct the fourth test
using the average test load and with the automatic water fill
control system set in the setting that will give the least energy
intensive result for the given test load. Average the results of
the third and fourth tests to obtain the energy and water
consumption values for the average test load size.
3.2.6.3 Clothes washers with automatic water fill control
system and alternate manual water fill control system. If a
clothes washer with an automatic water fill control system allows
user selection of manual controls as an alternative, test both
manual and automatic modes and, for each mode, calculate the energy
consumption (HET, MET, and DE) and water consumption (QT) values as
set forth in section 4 of this appendix. Then, calculate the
average of the two values (one from each mode, automatic and
manual) for each variable (HET, MET, DE, and QT) and use the
average value for each variable in the final calculations in
section 4 of this appendix.
3.2.7 Manufacturer default settings. For clothes washers
with electronic control systems, use the manufacturer default
settings for any cycle selections, except for (1) the temperature
selection, (2) the wash water fill levels, or (3) if necessary, the
spin speeds on wash cycles used to determine remaining moisture
content. Specifically, the manufacturer default settings must be
used for wash conditions such as agitation/tumble operation, soil
level, spin speed on wash cycles used to determine energy and water
consumption, wash times, rinse times, optional rinse settings,
water heating time for water heating clothes washers, and all other
wash parameters or optional features applicable to that wash cycle.
Any optional wash cycle feature or setting (other than wash/rinse
temperature, water fill level selection, or spin speed on wash
cycles used to determine remaining moisture content) that is
activated by default on the wash cycle under test must be included
for testing unless the manufacturer instructions recommend not
selecting this option, or recommend selecting a different option,
for washing normally soiled cotton clothing.
For clothes washers with control panels containing mechanical
switches or dials, any optional settings, except for (1) the
temperature selection, (2) the wash water fill levels, or (3) if
necessary, the spin speeds on wash cycles used to determine
remaining moisture content, must be in the position recommended by
the manufacturer for washing normally soiled cotton clothing. If
the manufacturer instructions do not recommend a particular switch
or dial position to be used for washing normally soiled cotton
clothing, the setting switch or dial must remain in its as-shipped
position.
3.2.8 For each wash cycle tested, include the entire active
washing mode and exclude any delay start or cycle finished
modes.
3.2.9 Discard the data from a wash cycle that provides a visual
or audio indicator to alert the user that an out-of-balance
condition has been detected, or that terminates prematurely if an
out-of-balance condition is detected, and thus does not include the
agitation/tumble operation, spin speed(s), wash times, and rinse
times applicable to the wash cycle under test. Document in the test
report the rejection of data from any wash cycle during testing and
the reason for the rejection.
3.3 Extra-Hot Wash/Cold Rinse. Measure the water and
electrical energy consumption for each water fill level and test
load size as specified in sections 3.3.1 through 3.3.3 of this
appendix for the Extra-Hot Wash/Cold Rinse as defined within the
energy test cycle.
Non-reversible temperature indicator labels, adhered to the
inside of the clothes container, may be used to confirm that an
extra-hot wash temperature greater than 135 °F has been achieved
during the wash cycle, under the following conditions. The label
must remain waterproof, intact, and adhered to the wash drum
throughout an entire wash cycle; provide consistent maximum
temperature readings; and provide repeatable temperature
indications sufficient to demonstrate that a wash temperature of
greater than 135 °F has been achieved. The label must have been
verified to consistently indicate temperature measurements with an
accuracy of ±1 °F if the label provides a temperature indicator at
135 °F. If the label does not provide a temperature indicator at
135 °F, the label must have been verified to consistently indicate
temperature measurements with an accuracy of ±1 °F if the
next-highest temperature indicator is greater than 135 °F and less
than 140 °F, or ±3 °F if the next-highest temperature indicator is
140 °F or greater. If the label does not provide a temperature
indicator at 135 °F, failure to activate the next-highest
temperature indicator does not necessarily indicate the lack of an
extra-hot wash temperature. However, such a result would not be
considered a valid test due to the lack of verification of the
water temperature requirement, in which case an alternative method
must be used to confirm that an extra-hot wash temperature greater
than 135 °F has been achieved during the wash cycle.
If using a temperature indicator label to test a front-loading
clothes washer, adhere the label along the interior surface of the
clothes container drum, midway between the front and the back of
the drum, adjacent to one of the baffles. If using a temperature
indicator label to test a top-loading clothes washer, adhere the
label along the interior surface of the clothes container drum, on
the vertical portion of the sidewall, as close to the bottom of the
container as possible.
3.3.1 Maximum test load and water fill. Measure the
values for hot water consumption (HmX), cold water consumption
(CmX), and electrical energy consumption (EmX) for an Extra-Hot
Wash/Cold Rinse cycle, with the controls set for the maximum water
fill level. Use the maximum test load size as specified in Table
5.1 of this appendix.
3.3.2 Minimum test load and water fill. Measure the
values for hot water consumption (Hmn), cold water consumption
(Cmn), and electrical energy consumption (Emn) for an Extra-Hot
Wash/Cold Rinse cycle, with the controls set for the minimum water
fill level. Use the minimum test load size as specified in Table
5.1 of this appendix.
3.3.3 Average test load and water fill. For a clothes
washer with an automatic water fill control system, measure the
values for hot water consumption (Hma), cold water consumption
(Cma), and electrical energy consumption (Ema) for an Extra-Hot
Wash/Cold Rinse cycle. Use the average test load size as specified
in Table 5.1 of this appendix.
3.4 Hot Wash/Cold Rinse. Measure the water and electrical
energy consumption for each water fill level and test load size as
specified in sections 3.4.1 through 3.4.3 of this appendix for the
Hot Wash/Cold Rinse temperature selection, as defined within the
energy test cycle.
3.4.1 Maximum test load and water fill. Measure the
values for hot water consumption (HhX), cold water consumption
(ChX), and electrical energy consumption (EhX) for a Hot Wash/Cold
Rinse cycle, with the controls set for the maximum water fill
level. Use the maximum test load size as specified in Table 5.1 of
this appendix.
3.4.2 Minimum test load and water fill. Measure the
values for hot water consumption (Hhn), cold water consumption
(Chn), and electrical energy consumption (Ehn) for a Hot Wash/Cold
Rinse cycle, with the controls set for the minimum water fill
level. Use the minimum test load size as specified in Table 5.1 of
this appendix.
3.4.3 Average test load and water fill. For a clothes
washer with an automatic water fill control system, measure the
values for hot water consumption (Hha), cold water consumption
(Cha), and electrical energy consumption (Eha) for a Hot Wash/Cold
Rinse cycle. Use the average test load size as specified in Table
5.1 of this appendix.
3.5 Warm Wash/Cold Rinse. Measure the water and
electrical energy consumption for each water fill level and test
load size as specified in sections 3.5.1 through 3.5.3 of this
appendix for the applicable Warm Wash/Cold Rinse temperature
selection(s), as defined within the energy test cycle.
For a clothes washer with fewer than four discrete Warm
Wash/Cold Rinse temperature selections, test all Warm Wash/Cold
Rinse selections. For a clothes washer that offers four or more
Warm Wash/Cold Rinse selections, test at all discrete selections,
or test at the 25 percent, 50 percent, and 75 percent positions of
the temperature selection device between the hottest hot (≤135 °F
(57.2 °C)) wash and the coldest cold wash. If a selection is not
available at the 25, 50 or 75 percent position, in place of each
such unavailable selection, use the next warmer setting. For each
reportable value to be used for the Warm Wash/Cold Rinse
temperature selection, calculate the average of all Warm Wash/Cold
Rinse temperature selections tested pursuant to this section.
3.5.1 Maximum test load and water fill. Measure the
values for hot water consumption (HwX), cold water consumption
(CwX), and electrical energy consumption (EwX) for the Warm
Wash/Cold Rinse cycle, with the controls set for the maximum water
fill level. Use the maximum test load size as specified in Table
5.1 of this appendix.
3.5.2 Minimum test load and water fill. Measure the
values for hot water consumption (Hwn), cold water consumption
(Cwn), and electrical energy consumption (Ewn) for the Warm
Wash/Cold Rinse cycle, with the controls set for the minimum water
fill level. Use the minimum test load size as specified in Table
5.1 of this appendix.
3.5.3 Average test load and water fill. For a clothes
washer with an automatic water fill control system, measure the
values for hot water consumption (Hwa), cold water consumption
(Cwa), and electrical energy consumption (Ewa) for a Warm Wash/Cold
Rinse cycle. Use the average test load size as specified in Table
5.1 of this appendix.
3.6 Warm Wash/Warm Rinse. Measure the water and
electrical energy consumption for each water fill level and/or test
load size as specified in sections 3.6.1 through 3.6.3 of this
appendix for the applicable Warm Wash/Warm Rinse temperature
selection(s), as defined within the energy testy cycle.
For a clothes washer with fewer than four discrete Warm
Wash/Warm Rinse temperature selections, test all Warm Wash/Warm
Rinse selections. For a clothes washer that offers four or more
Warm Wash/Warm Rinse selections, test at all discrete selections,
or test at 25 percent, 50 percent, and 75 percent positions of the
temperature selection device between the hottest hot (≤135 °F (57.2
°C)) wash and the coldest cold wash. If a selection is not
available at the 25, 50 or 75 percent position, in place of each
such unavailable selection use the next warmer setting. For each
reportable value to be used for the Warm Wash/Warm Rinse
temperature selection, calculate the arithmetic average of all Warm
Wash/Warm Rinse temperature selections tested pursuant to this
section.
3.6.1 Maximum test load and water fill. Measure the
values for hot water consumption (HwwX), cold water consumption
(CwwX), and electrical energy consumption (EwwX) for the Warm
Wash/Warm Rinse cycle, with the controls set for the maximum water
fill level. Use the maximum test load size as specified in Table
5.1 of this appendix.
3.6.2 Minimum test load and water fill. Measure the
values for hot water consumption (Hwwn), cold water consumption
(Cwwn), and electrical energy consumption (Ewwn) for the Warm
Wash/Warm Rinse cycle, with the controls set for the minimum water
fill level. Use the minimum test load size as specified in Table
5.1 of this appendix.
3.6.3 Average test load and water fill. For a clothes
washer with an automatic water fill control system, measure the
values for hot water consumption (Hwwa), cold water consumption
(Cwwa), and electrical energy consumption (Ewwa) for the Warm
Wash/Warm Rinse cycle. Use the average test load size as specified
in Table 5.1 of this appendix.
3.7 Cold Wash/Cold Rinse. Measure the water and
electrical energy consumption for each water fill level and test
load size as specified in sections 3.7.1 through 3.7.3 of this
appendix for the applicable Cold Wash/Cold Rinse temperature
selection, as defined within the energy test cycle.
3.7.1 Maximum test load and water fill. Measure the
values for hot water consumption (HcX), cold water consumption
(CcX), and electrical energy consumption (EcX) for a Cold Wash/Cold
Rinse cycle, with the controls set for the maximum water fill
level. Use the maximum test load size as specified in Table 5.1 of
this appendix.
3.7.2 Minimum test load and water fill. Measure the
values for hot water consumption (Hcn), cold water consumption
(Ccn), and electrical energy consumption (Ecn) for a Cold Wash/Cold
Rinse cycle, with the controls set for the minimum water fill
level. Use the minimum test load size as specified in Table 5.1 of
this appendix.
3.7.3 Average test load and water fill. For a clothes
washer with an automatic water fill control system, measure the
values for hot water consumption (Hca), cold water consumption
(Cca), and electrical energy consumption (Eca) for a Cold Wash/Cold
Rinse cycle. Use the average test load size as specified in Table
5.1 of this appendix.
3.8 Remaining moisture content (RMC).
3.8.1 The wash temperature must be the same as the rinse
temperature for all testing. Use the maximum test load as defined
in Table 5.1 of this appendix for testing.
3.8.2 Clothes washers with cold rinse only.
3.8.2.1 Record the actual “bone dry” weight of the test load
(WIX), then place the test load in the clothes washer.
3.8.2.2 Set the water level controls to maximum fill.
3.8.2.3 Run the Cold Wash/Cold Rinse cycle.
3.8.2.4 Record the weight of the test load immediately after
completion of the wash cycle (WCX).
3.8.2.5 Calculate the remaining moisture content of the maximum
test load, RMCX, defined as:
RMCX = (WCX − WIX)/WIX
3.8.2.6 Apply the RMC correction curve described in section 7 of
appendix J3 to this subpart to calculate the corrected remaining
moisture content, RMCcorr, expressed as a percentage as
follows:
RMCcorr = (A × RMCX + B) × 100% where: A and B are the coefficients
of the RMC correction curve as defined in section 6.1 of appendix
J3 to this subpart. RMCX = As defined in section 3.8.2.5 of this
appendix.
3.8.2.7 Use RMCcorr as the final corrected RMC in section 4.3 of
this appendix.
3.8.3 Clothes washers with both cold and warm rinse
options.
3.8.3.1 Complete sections 3.8.2.1 through 3.8.2.4 of this
appendix for a Cold Wash/Cold Rinse cycle. Calculate the remaining
moisture content of the maximum test load for Cold Wash/Cold Rinse,
RMCCOLD, defined as:
RMCCOLD = (WCX − WIX)/WIX
3.8.3.2 Apply the RMC correction curve described in section 7 of
appendix J3 to this subpart to calculate the corrected remaining
moisture content for Cold Wash/Cold Rinse, RMCCOLD,corr, expressed
as a percentage, as follows:
RMCCOLD,corr = (A × RMCCOLD + B) × 100% where: A and B are the
coefficients of the RMC correction curve as defined in section 6.1
of appendix J3 to this subpart. RMCCOLD = As defined in section
3.8.3.1 of this appendix.
3.8.3.3 Complete sections 3.8.2.1 through 3.8.2.4 of this
appendix using a Warm Wash/Warm Rinse cycle instead. Calculate the
remaining moisture content of the maximum test load for Warm
Wash/Warm Rinse, RMCWARM, defined as:
RMCWARM = (WCX−WIX)/WIX
3.8.3.4 Apply the RMC correction curve described in section 7 of
appendix J3 to this subpart to calculate the corrected remaining
moisture content for Warm Wash/Warm Rinse, RMCWARM,corr, expressed
as a percentage, as follows:
RMCWARM,corr = (A × RMCWARM + B) × 100% where: A and B are the
coefficients of the RMC correction curve as defined in section 6.1
of appendix J3 to this subpart. RMCWARM = As defined in section
3.8.3.3 of this appendix.
3.8.3.5 Calculate the corrected remaining moisture content of
the maximum test load, RMCcorr, expressed as a percentage as
follows:
RMCcorr = RMCCOLD,corr × (1 − TUFww) + RMCWARM,corr × (TUFww)
where: RMCCOLD,corr = As defined in section 3.8.3.2 of this
Appendix. RMCWARM,corr = As defined in section 3.8.3.4 of this
Appendix. TUFww is the temperature use factor for Warm Wash/Warm
Rinse as defined in Table 4.1.1 of this appendix.
3.8.3.6 Use RMCcorr as calculated in section 3.8.3.5 as the
final corrected RMC used in section 4.3 of this appendix.
3.8.4 Clothes washers that have options such as multiple
selections of spin speeds or spin times that result in different
RMC values, and that are available within the energy test
cycle.
3.8.4.1 Complete sections 3.8.2 or 3.8.3 of this appendix, as
applicable, using the maximum and minimum extremes of the available
spin options, excluding any “no spin” (zero spin speed) settings.
Combine the calculated values RMCcorr,max extraction and
RMCcorr,min extraction at the maximum and minimum settings,
respectively, as follows:
RMCcorr = 0.75 × RMCcorr,max extraction + 0.25 × RMCcorr,min
extraction where: RMCcorr, max extraction is the corrected
remaining moisture content using the maximum spin setting,
calculated according to section 3.8.2 or 3.8.3 of this appendix, as
applicable. RMCcorr, min extraction is the corrected remaining
moisture content using the minimum spin setting, calculated
according to section 3.8.2 or 3.8.3 of this appendix, as
applicable.
3.8.4.2 Use RMCcorr as calculated in section 3.8.4.1 as the
final corrected RMC used in section 4.3 of this appendix.
3.8.5 The procedure for calculating the corrected RMC as
described in section 3.8.2, 3.8.3, or 3.8.4 of this appendix may be
replicated twice in its entirety, for a total of three independent
corrected RMC measurements. If three replications of the RMC
measurement are performed, use the average of the three corrected
RMC measurements as the final corrected RMC in section 4.3 of this
appendix.
3.9 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 of this appendix.
3.9.1 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.
3.9.2 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.
3.9.3 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.
3.9.4 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 3.9.3 of this appendix, after performing the
measurement in section 3.9.3, activate the switch, dial, or button
to the position resulting in the lowest power consumption and
repeat the measurement procedure described in section 3.9.3.
Measure and record the lowest-power inactive/off mode power,
Plowest, in Watts.
3.10 Energy consumption for the purpose of determining the
cycle selection(s) 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 require the determination of the
wash/rinse temperature selection with the highest energy
consumption.
3.10.1 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, the manufacturer default settings shall be
used as described in section 3.2.7 of this appendix.
3.10.2 Use the clothes washer's maximum test load size,
determined from Table 5.1 of this appendix, for testing under this
section.
3.10.3 For clothes washers with a manual fill control system,
user-adjustable automatic water fill control system, or automatic
water fill control system with alternate manual water fill control
system, use the water fill selector setting resulting in the
maximum water level available for each cycle selection for testing
under this section.
3.10.4 Each wash cycle tested under this section shall include
the entire active washing mode and exclude any delay start or cycle
finished modes.
3.10.5 Measure each wash cycle's electrical energy consumption
(EX) and hot water consumption (HX). Calculate the total energy
consumption for each cycle selection (ETX), as follows:
ETX = EX + (HX × T × K) where: EX is the electrical energy
consumption, expressed in kilowatt-hours per cycle. HX is the hot
water consumption, expressed in gallons per cycle. T = nominal
temperature rise = 75 °F (41.7 °C). K = Water specific heat in
kilowatt-hours per gallon per degree F = 0.00240 kWh/gal - °F
(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 maximum, average, and minimum water fill levels tested.
Calculate the per-cycle temperature-weighted hot water consumption
for the maximum water fill level, VhX, the average water fill
level, Vha, and the minimum water fill level, Vhn, expressed in
gallons per cycle (or liters per cycle) and defined as:
HmX, Hma, and Hmn, are reported hot water consumption values, in
gallons per-cycle (or liters per cycle), at maximum, average, and
minimum water fill levels, respectively, for the Extra-Hot
Wash/Cold Rinse cycle, as measured in sections 3.3.1 through 3.3.3
of this appendix.
HhX, Hha, and Hhn, are reported hot water consumption values, in
gallons per-cycle (or liters per cycle), at maximum, average, and
minimum water fill levels, respectively, for the Hot Wash/Cold
Rinse cycle, as measured in sections 3.4.1 through 3.4.3 of this
appendix.
HwX, Hwa, and Hwn, are reported hot water consumption values, in
gallons per-cycle (or liters per cycle), at maximum, average, and
minimum water fill levels, respectively, for the Warm Wash/Cold
Rinse cycle, as measured in sections 3.5.1 through 3.5.3 of this
appendix.
HwwX, Hwwa, and Hwwn, are reported hot water consumption values,
in gallons per-cycle (or liters per cycle), at maximum, average,
and minimum water fill levels, respectively, for the Warm Wash/Warm
Rinse cycle, as measured in sections 3.6.1 through 3.6.3 of this
appendix.
HcX, Hca, and Hcn, are reported hot water consumption values, in
gallons per-cycle (or liters per cycle), at maximum, average, and
minimum water fill levels, respectively, for the Cold Wash/Cold
Rinse cycle, as measured in sections 3.7.1 through 3.7.3 of this
appendix.
TUFm, 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 4.1.1 - Temperature Use Factors
Wash/Rinse
Temperature Selections Available in the Energy Test Cycle
Clothes washers
with cold rinse only
Clothes washers
with both cold and warm rinse
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
H/C
W/C
W/W
C/C
XH/C
H/C
W/W
C/C
XH/C
H/C
W/C
W/W
C/C
TUFm
(Extra-Hot/Cold)
0.14
0.05
0.14
0.05
TUFh
(Hot/Cold)
0.63
0.14
* 0.49
0.09
0.14
* 0.22
0.09
TUFw
(Warm/Cold)
0.49
0.49
0.22
0.22
TUFww
(Warm/Warm)
0.27
0.27
0.27
TUFc
(Cold/Cold)
1.00
0.37
0.37
0.37
0.37
0.37
0.37
0.37
* On clothes washers with only two wash
temperature selections ≤135 °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
maximum, average, and minimum water fill levels tested.
Calculate the total per-cycle hot water energy consumption for the
maximum water fill level, HEmax, the average water fill level,
HEavg, and the minimum water fill level, HEmin, expressed in
kilowatt-hours per cycle and defined as:
(a) HEmax = [VhX × T × K] = Total energy when a maximum load is
tested. (b) HEavg = [Vha × T × K] = Total energy when an average
load is tested. (c) HEmin = [Vhn × T × K] = Total energy when a
minimum load is tested. where: VhX, Vha, and Vhn are defined in
section 4.1.1 of this appendix. T = Temperature rise = 75 °F (41.7
°C). K = Water specific heat in kilowatt-hours per gallon per
degree F = 0.00240 kWh/gal- °F (0.00114 kWh/L- °C).
4.1.3 Total weighted per-cycle hot water energy
consumption. Calculate the total weighted per-cycle hot water
energy consumption, HET, expressed in kilowatt-hours per cycle and
defined as:
HEmax, HEavg, and HEmin are defined in section 4.1.2 of this
appendix.
Fmax, Favg, and Fmin are the load usage factors for the maximum,
average, and minimum test loads based on the size and type of the
control system on the washer being tested, as defined in Table
4.1.3 of this appendix.
Table 4.1.3 - Load Usage Factors
Load usage
factor
Water fill
control system
Manual
Automatic
Fmax =
0.72
0.12
Favg =
0.74
Fmin =
0.28
0.14
4.1.4 Total per-cycle hot water energy consumption using
gas-heated or oil-heated water, for product labeling
requirements. Calculate for the energy test cycle the per-cycle
hot water consumption, HETG, using gas-heated or oil-heated water,
expressed in Btu per cycle (or megajoules per cycle) and defined
as:
HETG = HET × 1/e × 3412 Btu/kWh or HETG = HET × 1/e × 3.6 MJ/kWh
where: e = Nominal gas or oil water heater efficiency = 0.75. HET =
As defined in section 4.1.3 of this Appendix.
4.1.5 Per-cycle machine electrical energy consumption for all
maximum, average, and minimum test load sizes. Calculate the
total per-cycle machine electrical energy consumption for the
maximum water fill level, MEmax, the average water fill level,
MEavg, and the minimum water fill level, MEmin, expressed in
kilowatt-hours per cycle and defined as:
EmX, Ema, and Emn, are reported electrical energy consumption
values, in kilowatt-hours per cycle, at maximum, average, and
minimum test loads, respectively, for the Extra-Hot Wash/Cold Rinse
cycle, as measured in sections 3.3.1 through 3.3.3 of this
appendix.
EhX, Eha, and Ehn, are reported electrical energy consumption
values, in kilowatt-hours per cycle, at maximum, average, and
minimum test loads, respectively, for the Hot Wash/Cold Rinse
cycle, as measured in sections 3.4.1 through 3.4.3 of this
appendix.
EwX, Ewa, and Ewn, are reported electrical energy consumption
values, in kilowatt-hours per cycle, at maximum, average, and
minimum test loads, respectively, for the Warm Wash/Cold Rinse
cycle, as measured in sections 3.5.1 through 3.5.3 of this
appendix.
EwwX, Ewwa, and Ewwn, are reported electrical energy consumption
values, in kilowatt-hours per cycle, at maximum, average, and
minimum test loads, respectively, for the Warm Wash/Warm Rinse
cycle, as measured in sections 3.6.1 through 3.6.3 of this
appendix.
EcX, Eca, and Ecn, are reported electrical energy consumption
values, in kilowatt-hours per cycle, at maximum, average, and
minimum test loads, respectively, for the Cold Wash/Cold Rinse
cycle, as measured in sections 3.7.1 through 3.7.3 of this
appendix.
TUFm, TUFh, TUFw, TUFww, and TUFc are defined in Table 4.1.1 of
this appendix.
4.1.6 Total weighted per-cycle machine electrical energy
consumption. Calculate the total weighted per-cycle machine
electrical energy consumption, MET, expressed in kilowatt-hours per
cycle and defined as:
MEmax, MEavg, and MEmin are defined in section 4.1.5 of this
appendix.
Fmax, Favg, and Fmin are defined in Table 4.1.3 of this
appendix.
4.1.7 Total per-cycle energy consumption when electrically
heated water is used. Calculate the total per-cycle energy
consumption, ETE, using electrically heated water, expressed in
kilowatt-hours per cycle and defined as:
ETE = HET + MET where: MET = As defined in section 4.1.6 of this
appendix. HET = As defined in section 4.1.3 of this appendix.
4.2 Water consumption of clothes washers.
4.2.1 Per-cycle water consumption for Extra-Hot Wash/Cold
Rinse. Calculate the maximum, average, and minimum total water
consumption, expressed in gallons per cycle (or liters per cycle),
for the Extra-Hot Wash/Cold Rinse cycle and defined as:
HmX, CmX, Hma, Cma, Hmn, and Cmn are defined in section 3.3 of
this appendix.
4.2.2 Per-cycle water consumption for Hot Wash/Cold
Rinse. Calculate the maximum, average, and minimum total water
consumption, expressed in gallons per cycle (or liters per cycle),
for the Hot Wash/Cold Rinse cycle and defined as:
HhX, ChX, Hha, Cha, Hhn, and Chn are defined in section 3.4 of
this appendix.
4.2.3 Per-cycle water consumption for Warm Wash/Cold
Rinse. Calculate the maximum, average, and minimum total water
consumption, expressed in gallons per cycle (or liters per cycle),
for the Warm Wash/Cold Rinse cycle and defined as:
HwX, CwX, Hwa, Cwa, Hwn, and Cwn are defined in section 3.5 of
this appendix.
4.2.4 Per-cycle water consumption for Warm Wash/Warm
Rinse. Calculate the maximum, average, and minimum total water
consumption, expressed in gallons per cycle (or liters per cycle),
for the Warm Wash/Warm Rinse cycle and defined as:
Qwwmax = [HwwX + CwwX] Qwwavg = [Hwwa + Cwwa] Qwwmin = [Hwwn +
Cwwn] where: HwwX, CwwX, Hwwa, Cwwa, Hwwn, and Cwwn are defined in
section 3.6 of this appendix.
4.2.5 Per-cycle water consumption for Cold Wash/Cold
Rinse. Calculate the maximum, average, and minimum total water
consumption, expressed in gallons per cycle (or liters per cycle),
for the Cold Wash/Cold Rinse cycle and defined as:
Qcmax = [HcX + CcX] Qcavg = [Hca + Cca] Qcmin = [Hcn + Ccn] where:
HcX, CcX, Hca, Cca, Hcn, and Ccn are defined in section 3.7 of this
appendix.
4.2.6 Total weighted per-cycle water consumption for
Extra-Hot Wash/Cold Rinse. Calculate the total weighted
per-cycle water consumption for the Extra-Hot Wash/Cold Rinse
cycle, QmT, expressed in gallons per cycle (or liters per cycle)
and defined as:
Qmmax, Qmavg, Qmmin are defined in section 4.2.1 of this
appendix.
Fmax, Favg, Fmin are defined in Table 4.1.3 of this
appendix.
4.2.7 Total weighted per-cycle water consumption for Hot
Wash/Cold Rinse. Calculate the total weighted per-cycle water
consumption for the Hot Wash/Cold Rinse cycle, QhT, expressed in
gallons per cycle (or liters per cycle) and defined as:
Qhmax, Qhavg, Qhmin are defined in section 4.2.2 of this
appendix.
Fmax, Favg, Fmin are defined in Table 4.1.3 of this
appendix.
4.2.8 Total weighted per-cycle water consumption for Warm
Wash/Cold Rinse. Calculate the total weighted per-cycle water
consumption for the Warm Wash/Cold Rinse cycle, QwT, expressed in
gallons per cycle (or liters per cycle) and defined as:
Qwmax, Qwavg, Qwmin are defined in section 4.2.3 of this
appendix.
Fmax, Favg, Fmin are defined in Table 4.1.3 of this
appendix.
4.2.9 Total weighted per-cycle water consumption for Warm
Wash/Warm Rinse. Calculate the total weighted per-cycle water
consumption for the Warm Wash/Warm Rinse cycle, QwwT, expressed in
gallons per cycle (or liters per cycle) and defined as:
Qwwmax, Qwwavg, Qwwmin are defined in section 4.2.4 of this
appendix.
Fmax, Favg, Fmin are defined in Table 4.1.3 of this
appendix.
4.2.10 Total weighted per-cycle water consumption for Cold
Wash/Cold Rinse. Calculate the total weighted per-cycle water
consumption for the Cold Wash/Cold Rinse cycle, QcT, expressed in
gallons per cycle (or liters per cycle) and defined as:
Qcmax, Qcavg, Qcmin are defined in section 4.2.5 of this
appendix.
Fmax, Favg, Fmin are defined in Table 4.1.3 of this
appendix.
4.2.11 Total weighted per-cycle water consumption for all
wash cycles. Calculate the total weighted per-cycle water
consumption for all wash cycles, QT, expressed in gallons per cycle
(or liters per cycle) and defined as:
QmT, QhT, QwT, QwwT, and QcT are defined in sections 4.2.6
through 4.2.10 of this appendix.
TUFm, TUFh, TUFw, TUFww, and TUFc are defined in Table 4.1.1 of
this appendix.
4.2.12 Water factor. Calculate the water factor, WF,
expressed in gallons per cycle per cubic foot (or liters per cycle
per liter), as:
WF = QcT/C where: QcT = As defined in section 4.2.10 of this
appendix. C = As defined in section 3.1.7 of this appendix.
4.2.13 Integrated water factor. Calculate the integrated
water factor, IWF, expressed in gallons per cycle per cubic foot
(or liters per cycle per liter), as:
IWF = QT/C where: QT = As defined in section 4.2.11 of this
appendix. C = As defined in section 3.1.7 of this appendix.
4.3 Per-cycle energy consumption for removal of moisture from
test load. Calculate the per-cycle energy required to remove
the remaining moisture of the test load, DE, expressed in
kilowatt-hours per cycle and defined as:
DE = [(Fmax × Maximum test load weight) + (Favg × Average test
load weight) + (Fmin × Minimum test load weight)] × (RMCcorr - 4%)
× (DEF) × (DUF)
where:
Fmax, Favg, and Fmin are defined in Table 4.1.3 of this
appendix.
Maximum, average, and minimum test load weights are defined in
Table 5.1 of this appendix.
RMCcorr = As defined in section 3.8.2.6, 3.8.3.5, or 3.8.4.1 of
this Appendix. DEF = Nominal energy required for a clothes dryer to
remove moisture from clothes = 0.5 kWh/lb (1.1 kWh/kg). DUF = Dryer
usage factor, percentage of washer loads dried in a clothes dryer =
0.91.
4.4 Per-cycle combined low-power mode energy consumption.
Calculate the per-cycle combined low-power mode energy consumption,
ETLP, expressed in kilowatt-hours per cycle and defined as:
Pdefault = Default inactive/off mode power, in watts, as
measured in section 3.9.3 of this appendix.
Plowest = Lowest-power inactive/off mode power, in watts, as
measured in section 3.9.4 of this appendix for clothes washers with
a switch, dial, or button that can be optionally selected by the
end user to achieve a lower-power inactive/off mode than the
default inactive/off mode; otherwise, Plowest=0. Sdefault= Annual
hours in default inactive/off mode, defined as 8,465 if no optional
lowest-power inactive/off mode is available; otherwise 4,232.5.
Slowest= Annual hours in lowest-power inactive/off mode, defined as
0 if no optional lowest-power inactive/off mode is available;
otherwise 4,232.5. Kp = Conversion factor of watt-hours to
kilowatt-hours = 0.001. 295 = Representative average number of
clothes washer cycles in a year. 8,465 = Combined annual hours for
inactive and off mode. 4,232.5 = One-half of the combined annual
hours for inactive and off mode.
4.5 Modified energy factor. Calculate the modified energy
factor, MEF, expressed in cubic feet per kilowatt-hour per cycle
(or liters per kilowatt-hour per cycle) and defined as:
MEF = C/(ETE + DE) where: C = As defined in section 3.1.7 of this
appendix. ETE = As defined in section 4.1.7 of this appendix. DE =
As defined in section 4.3 of this appendix.
4.6 Integrated modified energy factor. Calculate the
integrated modified energy factor, IMEF, expressed in cubic feet
per kilowatt-hour per cycle (or liters per kilowatt-hour per cycle)
and defined as:
IMEF = C/(ETE + DE + ETLP) where: C = As defined in section 3.1.7
of this appendix. ETE = As defined in section 4.1.7 of this
appendix. DE = As defined in section 4.3 of this appendix. ETLP =
As defined in section 4.4 of this appendix. 5. Test Loads
Table 5.1 - Test Load Sizes
Container
volume
Minimum load
Maximum load
Average load
cu. ft.
liter
lb
kg
lb
kg
lb
kg
≥ <
≥ <
0.00-0.80
0.00-22.7
3.00
1.36
3.00
1.36
3.00
1.36
0.80-0.90
22.7-25.5
3.00
1.36
3.50
1.59
3.25
1.47
0.90-1.00
25.5-28.3
3.00
1.36
3.90
1.77
3.45
1.56
1.00-1.10
28.3-31.1
3.00
1.36
4.30
1.95
3.65
1.66
1.10-1.20
31.1-34.0
3.00
1.36
4.70
2.13
3.85
1.75
1.20-1.30
34.0-36.8
3.00
1.36
5.10
2.31
4.05
1.84
1.30-1.40
36.8-39.6
3.00
1.36
5.50
2.49
4.25
1.93
1.40-1.50
39.6-42.5
3.00
1.36
5.90
2.68
4.45
2.02
1.50-1.60
42.5-45.3
3.00
1.36
6.40
2.90
4.70
2.13
1.60-1.70
45.3-48.1
3.00
1.36
6.80
3.08
4.90
2.22
1.70-1.80
48.1-51.0
3.00
1.36
7.20
3.27
5.10
2.31
1.80-1.90
51.0-53.8
3.00
1.36
7.60
3.45
5.30
2.40
1.90-2.00
53.8-56.6
3.00
1.36
8.00
3.63
5.50
2.49
2.00-2.10
56.6-59.5
3.00
1.36
8.40
3.81
5.70
2.59
2.10-2.20
59.5-62.3
3.00
1.36
8.80
3.99
5.90
2.68
2.20-2.30
62.3-65.1
3.00
1.36
9.20
4.17
6.10
2.77
2.30-2.40
65.1-68.0
3.00
1.36
9.60
4.35
6.30
2.86
2.40-2.50
68.0-70.8
3.00
1.36
10.00
4.54
6.50
2.95
2.50-2.60
70.8-73.6
3.00
1.36
10.50
4.76
6.75
3.06
2.60-2.70
73.6-76.5
3.00
1.36
10.90
4.94
6.95
3.15
2.70-2.80
76.5-79.3
3.00
1.36
11.30
5.13
7.15
3.24
2.80-2.90
79.3-82.1
3.00
1.36
11.70
5.31
7.35
3.33
2.90-3.00
82.1-85.0
3.00
1.36
12.10
5.49
7.55
3.42
3.00-3.10
85.0-87.8
3.00
1.36
12.50
5.67
7.75
3.52
3.10-3.20
87.8-90.6
3.00
1.36
12.90
5.85
7.95
3.61
3.20-3.30
90.6-93.4
3.00
1.36
13.30
6.03
8.15
3.70
3.30-3.40
93.4-96.3
3.00
1.36
13.70
6.21
8.35
3.79
3.40-3.50
96.3-99.1
3.00
1.36
14.10
6.40
8.55
3.88
3.50-3.60
99.1-101.9
3.00
1.36
14.60
6.62
8.80
3.99
3.60-3.70
101.9-104.8
3.00
1.36
15.00
6.80
9.00
4.08
3.70-3.80
104.8-107.6
3.00
1.36
15.40
6.99
9.20
4.17
3.80-3.90
107.6-110.4
3.00
1.36
15.80
7.16
9.40
4.26
3.90-4.00
110.4-113.3
3.00
1.36
16.20
7.34
9.60
4.35
4.00-4.10
113.3-116.1
3.00
1.36
16.60
7.53
9.80
4.45
4.10-4.20
116.1-118.9
3.00
1.36
17.00
7.72
10.00
4.54
4.20-4.30
118.9-121.8
3.00
1.36
17.40
7.90
10.20
4.63
4.30-4.40
121.8-124.6
3.00
1.36
17.80
8.09
10.40
4.72
4.40-4.50
124.6-127.4
3.00
1.36
18.20
8.27
10.60
4.82
4.50-4.60
127.4-130.3
3.00
1.36
18.70
8.46
10.85
4.91
4.60-4.70
130.3-133.1
3.00
1.36
19.10
8.65
11.05
5.00
4.70-4.80
133.1-135.9
3.00
1.36
19.50
8.83
11.25
5.10
4.80-4.90
135.9-138.8
3.00
1.36
19.90
9.02
11.45
5.19
4.90-5.00
138.8-141.6
3.00
1.36
20.30
9.20
11.65
5.28
5.00-5.10
141.6-144.4
3.00
1.36
20.70
9.39
11.85
5.38
5.10-5.20
144.4-147.2
3.00
1.36
21.10
9.58
12.05
5.47
5.20-5.30
147.2-150.1
3.00
1.36
21.50
9.76
12.25
5.56
5.30-5.40
150.1-152.9
3.00
1.36
21.90
9.95
12.45
5.65
5.40-5.50
152.9-155.7
3.00
1.36
22.30
10.13
12.65
5.75
5.50-5.60
155.7-158.6
3.00
1.36
22.80
10.32
12.90
5.84
5.60-5.70
158.6-161.4
3.00
1.36
23.20
10.51
13.10
5.93
5.70-5.80
161.4-164.2
3.00
1.36
23.60
10.69
13.30
6.03
5.80-5.90
164.2-167.1
3.00
1.36
24.00
10.88
13.50
6.12
5.90-6.00
167.1-169.9
3.00
1.36
24.40
11.06
13.70
6.21
Notes: (1) All test load weights are bone
dry weights.
(2) Allowable tolerance on the test load
weights is ±0.10 lbs (0.05 kg).
6. Waivers and Field Testing
6.1 Waivers and Field Testing for Nonconventional Clothes
Washers. Manufacturers of nonconventional clothes washers, such
as clothes washers with adaptive control systems, must submit a
petition for waiver pursuant to 10 CFR 430.27 to establish an
acceptable test procedure for that clothes washer if the washer
cannot be tested pursuant to the DOE test procedure or the DOE test
procedure yields results that are so unrepresentative of the
clothes washer's true energy consumption characteristics as to
provide materially inaccurate comparative data. In such cases,
field testing may be appropriate for establishing an acceptable
test procedure. The following are guidelines for field testing that
may be used by manufacturers in support of petitions for waiver.
These guidelines are not mandatory and the Department may determine
that they do not apply to a particular model. Depending upon a
manufacturer's approach for conducting field testing, additional
data may be required. Manufacturers are encouraged to communicate
with the Department prior to the commencement of field tests that
may be used to support a petition for waiver. Section 6.3 of this
appendix provides an example of field testing for a clothes washer
with an adaptive water fill control system. Other features, such as
the use of various spin speed selections, could be the subject of
field tests.
6.2 Nonconventional Wash System Energy Consumption Test.
The field test may consist of a minimum of 10 of the
nonconventional clothes washers (“test clothes washers”) and 10
clothes washers already being distributed in commerce (“base
clothes washers”). The tests should include a minimum of 50 wash
cycles per clothes washer. The test clothes washers and base
clothes washers should be identical in construction except for the
controls or systems being tested. Equal numbers of both the test
clothes washer and the base clothes washer should be tested
simultaneously in comparable settings to minimize seasonal or
end-user laundering conditions or variations. The clothes washers
should be monitored in such a way as to accurately record the
average total energy and water consumption per cycle, including
water heating energy when electrically heated water is used, and
the energy required to remove the remaining moisture of the test
load. Standby and off mode energy consumption should be measured
according to section 4.4 of this test procedure. The field test
results should be used to determine the best method to correlate
the rating of the test clothes washer to the rating of the base
clothes washer.
6.3 Adaptive water fill control system field test. (1)
Section 3.2.6.3 of this appendix defines the test method for
measuring energy consumption for clothes washers that incorporate
both adaptive (automatic) and alternate manual water fill control
systems. Energy consumption calculated by the method defined in
section 3.2.6.3 of this appendix assumes the adaptive cycle will be
used 50 percent of the time. This section can be used to develop
field test data in support of a petition for waiver when it is
believed that the adaptive cycle will be used more than 50 percent
of the time. The field test sample size should be a minimum of 10
test clothes washers. The test clothes washers should be
representative of the design, construction, and control system that
will be placed in commerce. The duration of field testing in the
user's house should be a minimum of 50 wash cycles, for each unit.
No special instructions as to cycle selection or product usage
should be given to the field test participants, other than
inclusion of the product literature pack that would be shipped with
all units, and instructions regarding filling out data collection
forms, use of data collection equipment, or basic procedural
methods. Prior to the test clothes washers being installed in the
field test locations, baseline data should be developed for all
field test units by conducting laboratory tests as defined by
section 1 through section 5 of this appendix to determine the
energy consumption, water consumption, and remaining moisture
content values. The following data should be measured and recorded
for each wash load during the test period: wash cycle selected, the
mode of the clothes washer (adaptive or manual), clothes load dry
weight (measured after the clothes washer and clothes dryer cycles
are completed) in pounds, and type of articles in the clothes load
(e.g., cottons, linens, permanent press). The wash cycles
used in calculating the in-home percentage split between adaptive
and manual cycle usage should be only those wash cycles that
conform to the definition of the energy test cycle.
Calculate:
T = The total number of wash cycles run during the field test. Ta =
The total number of adaptive control wash cycles. Tm = The total
number of manual control wash cycles.
The percentage weighting factors:
Pa = (Ta/T) × 100% (the percentage weighting for adaptive control
selection) Pm = (Tm/T) × 100% (the percentage weighting for manual
control selection)
(2) Energy consumption (HET, MET, and DE) and water consumption
(QT) values calculated in section 4 of this appendix for the manual
and adaptive modes should be combined using Pa and Pm as the
weighting factors.
[80 FR 46767, Aug. 5, 2015; 80 FR 50757, Aug. 21, 2015, as amended
at 80 FR 62443, Oct. 16, 2015]