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Federal Register / Vol. 86, No. 243 / Wednesday, December 22, 2021 / Proposed Rules
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b. If a non-soil-sensing dishwasher is not tested at a certain soil load as specified in Section 4.1.d of this appendix, use the energy and water consumption values of the preceding soil load when calculating the weighted average energy and water consumption values i.e., if the sensor medium response and sensor light response tests on the normal cycle are not conducted, use the values of the sensor heavy response test for all three soil loads; if only the sensor light response test is not conducted, use the values of the sensor medium response test for the sensor light response test.
c. For dishwashers that do not have a direct water line, water consumption is equal to the volume of water use in the test cycle, as specified by the manufacturer.
d. In Sections 5.6.1.3, 5.6.1.4, 5.6.2.3, and 5.6.2.4 of AHAM DW12020, use C/e in place of K.
5.1 Cleaning Index.
Determine the per-cycle cleaning index for each test cycle using the equation in Section 5.12.3.2 of AHAM DW22020.
5.2 Calculation for determination of the most energy-intensive cycle type.
The total cycle energy consumption for the determination of the most energy-intensive cycle specified in Section 4.1.1 of this appendix is calculated for each tested cycle type as:
EMEI = M + EF ED/2 + W
where, M = per-cycle machine electrical energy consumption, expressed in kilowatt hours per cycle, EF = fan-only mode electrical energy consumption, if available on the tested cycle type, expressed in kilowatt hours per cycle, ED = drying energy consumed using the power-dry feature after the termination of the last rinse option of the tested cycle type, if available on the tested cycle type, expressed in kilowatt hours per cycle, and
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W = water energy consumption and is defined as:
V T K, for dishwashers using electrically heated water, and V T C/e, for dishwashers using gas-heated or oil-heated water.
Additionally, V = water consumption in gallons per cycle, T = nominal water heater temperature rise and is equal to 90 F for dishwashers that operate with a nominal 140 F inlet water temperature, and 70 F for dishwashers that operate with a nominal 120 F inlet water temperature, K = specific heat of water in kilowatt-hours per gallon per degree Fahrenheit =
0.0024, C = specific heat of water in Btus per gallon per degree Fahrenheit = 8.2, and e = nominal gas or oil water heater recovery efficiency = 0.75.
5.3 Calculation of cycle duration.
The cycle duration, t, expressed in hours, is calculated as:
t = thr Fhr + tmr Fmr + tlr Flr where, thr = the duration of the sensor heavy response cycle including the power-dry feature, tmr = the duration of the sensor medium response cycle including the power-dry feature, tlr = the duration of the sensor light response cycle including the power-dry feature, Fhr = the weighting factor based on consumer use of heavy response = 0.05, Fmr = the weighting factor based on consumer use of medium response = 0.33, and Flr = the weighting factor based on consumer use of light response = 0.62.

6. Section 430.32 is amended by revising paragraph f1 to read as follows:

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f Dishwashers. 1 All dishwashers manufactured on or after May 30, 2013, shall meet the following standard i Standard size dishwashers shall not exceed 307 kwh/year and 5.0
gallons per cycle. Standard size dishwashers have a capacity equal to or greater than eight place settings plus six serving pieces as specified in AHAM
DW12020 incorporated by reference, see 430.3 using the test load specified in section 2.4 of appendix C1 or appendix C2 in subpart B of this part, as applicable.
ii Compact size dishwashers shall not exceed 222 kwh/year and 3.5
gallons per cycle. Compact size dishwashers have a capacity less than eight place settings plus six serving pieces as specified in AHAM DW1
2020 using the test load specified in section 2.4 of appendix C1 or appendix C2 in subpart B of this part, as applicable.
iii Standard size dishwashers with a normal cycle, as defined in AHAM
DW12020, of 60 minutes or less are not currently subject to energy or water conservation standards. Standard size dishwashers have a capacity equal to or greater than eight place settings plus six serving pieces as specified in AHAM
DW12020 using the test load specified in section 2.4 of appendix C1
or appendix C2 in subpart B of this part, as applicable. Normal cycle duration is determined according to section 5.3 of appendix C1 or appendix C2 in subpart B of this part, as applicable.

430.32 Energy and water conservation standards and their compliance dates.

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