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Federal Register / Vol. 86, No. 193 / Friday, October 8, 2021 / Rules and Regulations optional cycle settings that do not affect the program, temperature or dryness settings shall be tested in the as-shipped position, except that if the clothes dryer has network capabilities, the network settings must be disabled throughout testing if such settings can be disabled by the end-user and the products user manual provides instructions on how to do so. If the network settings cannot be disabled by the end-user, or the products user manual does not provide instruction for disabling network settings, then the unit must be tested with the network settings in the factory default configuration for the test cycle.
Operate the clothes dryer until the completion of the programmed cycle, including the cool down period. The cycle shall be considered complete when the dryer indicates to the user that the cycle has finished by means of a display, indicator light, audible signal, or other signal and the heater and drum/fan motor shuts off for the final time. If the clothes dryer is equipped with a wrinkle prevention mode i.e., that continuously or intermittently tumbles the clothes dryer drum after the clothes dryer indicates to the user that the cycle has finished that is activated by default in the as-shipped position or if manufacturers instructions specify that the feature is recommended to be activated for normal use, the cycle shall be considered complete after the end of the wrinkle prevention mode.
After the completion of the test cycle, remove and weigh the test load within 5 minutes following termination of the test cycle.
Record the data specified in section 3.4 of this appendix. If the final moisture content is greater than 2 percent, the results from the test are invalid and a second run must be conducted. Conduct the second run of the test on the unit using the highest dryness level setting. If, on this second run, the dryer does not achieve a final moisture content of 2 percent or lower, the dryer has not sufficiently dried the clothes and the test results may not be used for certification of compliance with energy conservation standards. If the dryer automatically stops during a cycle because the condensation box is full of water, the test is stopped, and the test run is invalid, in which case the condensation box shall be emptied and the test re-run from the beginning. For ventless clothes dryers, during the time between two cycles, the door of the dryer shall be closed except for loading and unloading.

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3.4.1 Bone-dry weight of the test load, Wbonedry, as described in section 2.7.1 of this appendix.
3.4.2 Moisture content of the wet test load before the test, IMC, as described in section 2.7.2 of this appendix.
3.4.3 Moisture content of the dry test load obtained after the test, FMC, as described in section 3.3 of this appendix.

3.5 Standby mode and off mode power.
Connect the clothes dryer to a watt meter as specified in section 2.4.7 of this appendix.
Establish the testing conditions set forth in section 2 of this appendix.
3.5.1 Perform standby mode and off mode testing after completion of an active mode
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drying cycle included as part of the test cycle; after removing the test load; without changing the control panel settings used for the active mode drying cycle; with the door closed; and without disconnecting the electrical energy supply to the clothes dryer between completion of the active mode drying cycle and the start of standby mode and off mode testing.
3.5.2 For clothes dryers that take 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, allow sufficient time for the clothes dryer 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 dryer with a switch or other means 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 or other means 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 lowest inactive/off mode power, Plowest, in watts.
4.
4.1 Total per-cycle electric dryer energy consumption. Calculate the total per-cycle electric dryer energy consumption required to achieve a final moisture content of 2
percent or less, Ece, expressed in kilowatthours per cycle and defined as:
Ece = Et, for automatic termination control dryers, and, Ece = 55.5/IMCFMC Et field use, for timer dryers Where:
55.5 = an experimentally established value for the percent reduction in the moisture content of the test load during a laboratory test cycle expressed as a percent.
Et = the energy recorded in section 3.4.5 of this appendix.
field use = 1.18, the field use factor for clothes dryers with time termination control systems only without any automatic termination control functions.
IMC = the moisture content of the wet test load as recorded in section 3.4.2 of this appendix.
FMC = the moisture content of the dry test load as recorded in section 3.4.3 of this appendix.
4.2 Per-cycle gas dryer electrical energy consumption. Calculate the per-cycle gas dryer electrical energy consumption required to achieve a final moisture content of 2
percent or less, Ege, expressed in kilowatthours per cycle and defined as:
Ege = Ete,
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for automatic termination control dryers, and, Ege = 55.5/IMCFMC Ete field use, for timer dryers Where:
Ete = the energy recorded in section 3.4.6.1
of this appendix.
field use, 55.5, IMC, and FMC as defined in section 4.1 of this appendix.
4.3 Per-cycle gas dryer gas energy consumption. Calculate the per-cycle gas dryer gas energy consumption required to achieve a final moisture content of 2 percent or less, Egg, expressed in Btus per cycle and defined as:
Egg = Etg GEF
for automatic termination control dryers, and, Egg = 55.5/IMCFMC Etg field use
GEF
for timer dryers Where:
Etg = the energy recorded in section 3.4.6.2
of this appendix.
GEF = corrected gas heat value Btu per cubic foot as defined in section 3.4.6.3 of this appendix, field use, 55.5, IMC, and FMC as defined in section 4.1 of this appendix.
4.4 Total per-cycle gas dryer energy consumption expressed in kilowatt-hours.
Calculate the total per-cycle gas dryer energy consumption required to achieve a final moisture content of 2 percent or less, Ecg, expressed in kilowatt-hours per cycle and defined as:
Ecg = Ege + Egg/3412 Btu/kWh Where:
Ege = the energy calculated in section 4.2 of this appendix Egg = the energy calculated in section 4.3 of this appendix 4.5 Per-cycle standby mode and off mode energy consumption. Calculate the clothes dryer per-cycle standby mode and off mode energy consumption, ETSO, expressed in kilowatt-hours per cycle and defined as:
ETSO = Pdefault Sdefault + Plowest Slowest K/Cannual Where:
Pdefault = Default inactive/off mode power, in watts, as measured in section 3.5.3 of this appendix.
Plowest = Lowest inactive/off mode power, in watts, as measured in section 3.5.4 of this appendix for clothes dryer with a switch or other means 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 8,620 if no optional lowest-power inactive/off mode is available; otherwise 4,310.
Slowest = Annual hours in lowest-power inactive/off mode, defined as 0 if no optional lowest-power inactive/off mode is available; otherwise 4,310.
K = Conversion factor of watt-hours to kilowatt-hours = 0.001.
Cannual = Representative average number of clothes dryer cycles in a year as specified in section 4.5.1.

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