10 CFR Part 430, Subpart B, Appendix C1 to Subpart B of Part 430 - Uniform Test Method for Measuring the Energy Consumption of Dishwashers

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Appendix C1 to Subpart B of Part 430—Uniform Test Method for Measuring the Energy Consumption of Dishwashers
Note:
Prior to the compliance date for any amended energy conservation standards that incorporate standby mode and off mode energy consumption (May 30, 2013 unless the direct final rule published on May 30, 2012 is withdrawn), manufacturers may use either Appendix C or Appendix C1 to certify compliance with existing DOE energy conservation standards and to make any representations related to energy and/or water consumption of dishwashers, with the following exception. If the compliance date is after April 29, 2013, manufacturers that make representations related to standby mode and off mode energy consumption must use Appendix C1 for any representations made after April 29, 2013 of the energy and/or water consumption of these products, consistent with the requirements of 42 U.S.C. 6293(c)(2).
After the compliance date for any amended energy conservation standards that incorporate standby mode and off mode energy consumption (May 30, 2013 unless the direct final rule published on May 30, 2012 is withdrawn), all dishwashers shall be tested using the provisions of Appendix C1 to certify compliance with amended energy conservation standards and to make any representations related to energy and/or water consumption, with the following exception. If the compliance date is before April 29, 2013, manufacturers may use Appendix C for any representations until April 29, 2013 of energy and/or water consumption of these products, consistent with the requirements of 42 U.S.C. 6293(c)(2).
1. Definitions
1.1Active mode means a mode in which the dishwasher is connected to a mains power source, has been activated, and is performing one of the main functions of washing, rinsing, or drying (when a drying process is included) dishware, glassware, eating utensils, and most cooking utensils by chemical, mechanical, and/or electrical means, or is involved in functions necessary for these main functions, such as admitting water into the dishwasher, pumping water out of the dishwasher, circulating air, or regenerating an internal water softener.
1.2AHAM means the Association of Home Appliance Manufacturers.
1.3Combined low-power mode means the aggregate of available modes other than active mode.
1.4Compact dishwasher means a dishwasher that has a capacity of less than eight place settings plus six serving pieces as specified in ANSI/AHAM DW-1-2010 (incorporated by reference; see § 430.3), using the test load specified in section 2.7 of this appendix.
1.5Cycle means a sequence of operations of a dishwasher which performs a complete dishwashing function, and may include variations or combinations of washing, rinsing, and drying.
1.6Cycle finished mode means a standby mode which provides continuous status display following operation in active mode.
1.7Cycle type means any complete sequence of operations capable of being preset on the dishwasher prior to the initiation of machine operation.
1.8Fan-only mode means an active mode that is not user-selectable, and in which a fan circulates air for a finite period of time after the end of the cycle, where the end of the cycle is indicated to the consumer by means of a display, indicator light, or audible signal.
1.9IEC 62301 means the standard published by the International Electrotechnical Commission, titled “Household electrical appliances-Measurement of standby power,” Publication 62301 (Edition 2.0, 2011-01) (incorporated by reference; see § 430.3).
1.10Inactive 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.
1.11Non-soil-sensing dishwasher means a dishwasher that does not have the ability to adjust automatically any energy consuming aspect of the normal cycle based on the soil load of the dishes.
1.12Normal cycle means the cycle type, including washing and drying temperature options, recommended in the manufacturer's instructions for daily, regular, or typical use to completely wash a full load of normally soiled dishes including the power-dry feature. If no cycle or more than one cycle is recommended in the manufacturer's instructions for daily, regular, or typical use to completely wash a full load of normally soiled dishes, the most energy intensive of these cycles shall be considered the normal cycle. In the absence of a manufacturer recommendation on washing and drying temperature options, the highest energy consumption options must be selected.
1.13Off mode means a mode in which the dishwasher is connected to a mains power source and is not providing any active mode or standby mode function, and where the mode may persist for an indefinite time. An indicator that only shows the user that the product is in the off position is included within the classification of an off mode.
1.14Power-dry feature means the introduction of electrically-generated heat into the washing chamber for the purpose of improving the drying performance of the dishwasher.
1.15Preconditioning cycle means a normal cycle run with no test load to ensure that the water lines and sump area of the pump are primed.
1.16Sensor heavy response means, for standard dishwashers, the set of operations in a soil-sensing dishwasher for completely washing a load of dishes, four place settings of which are soiled according to ANSI/AHAM DW-1-2010 (incorporated by reference; see § 430.3) and as additionally specified in section 2.7 of this appendix. For compact dishwashers, this definition is the same, except that two soiled place settings are used instead of four.
1.17Sensor light response means, for both standard and compact dishwashers, the set of operations in a soil-sensing dishwasher for completely washing a load of dishes, one place setting of which is soiled with half of the gram weight of soils for each item specified in a single place setting according to ANSI/AHAM DW-1-2010 (incorporated by reference; see § 430.3) and as additionally specified in section 2.7 of this appendix.
1.18Sensor medium response means, for standard dishwashers, the set of operations in a soil-sensing dishwasher for completely washing a load of dishes, two place settings of which are soiled according to ANSI/AHAM DW-1-2010 (incorporated by reference; see § 430.3) and as additionally specified in section 2.7 of this appendix. For compact dishwashers, this definition is the same, except that one soiled place setting is used instead of two.
1.19Soil-sensing dishwasher means a dishwasher that has the ability to adjust any energy-consuming aspect of the normal cycle based on the soil load of the dishes.
1.20Standard dishwasher means a dishwasher that has a capacity equal to or greater than eight place settings plus six serving pieces as specified in ANSI/AHAM DW-1-2010 (incorporated by reference; see § 430.3), using the test load specified in section 2.7 of this appendix.
1.21Standby mode means a mode in which the dishwasher is connected to a mains power source and offers one or more of the following user-oriented or protective functions which may persist for an indefinite time: (a) To facilitate 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.
1.22Truncated normal cycle means the normal cycle interrupted to eliminate the power-dry feature after the termination of the last rinse operation.
1.23Truncated sensor heavy response means the sensor heavy response interrupted to eliminate the power-dry feature after the termination of the last rinse operation.
1.24Truncated sensor light response means the sensor light response interrupted to eliminate the power-dry feature after the termination of the last rinse operation.
1.25Truncated sensor medium response means the sensor medium response interrupted to eliminate the power-dry feature after the termination of the last rinse operation.
1.26Water-heating dishwasher means a dishwasher which, as recommended by the manufacturer, is designed for heating cold inlet water (nominal 50 °F) or designed for heating water with a nominal inlet temperature of 120 °F. Any dishwasher designated as water-heating (50 °F or 120 °F inlet water) must provide internal water heating to above 120 °F in a least one wash phase of the normal cycle.
1.27Water-softening dishwasher means a dishwasher which incorporates a water softening system that periodically consumes additional water and energy during the cycle to regenerate.
2. Testing Conditions
2.1Installation requirements. Install the dishwasher according to the manufacturer's instructions, including drain height. If the manufacture does not provide instructions for a specific drain height, the drain height shall be 20 inches. The racks shall be positioned according to the manufacturer recommendation for washing a full load of normally soiled dishes, or in the absence of a recommendation, the racks shall be maintained in the as-shipped position. The rinse aid container shall remain empty. A standard or compact under-counter or under-sink dishwasher must be tested in a rectangular enclosure constructed of nominal 0.374 inch (9.5 mm) plywood painted black. The enclosure must consist of a top, a bottom, a back, and two sides. If the dishwasher includes a counter top as part of the appliance, omit the top of the enclosure. Bring the enclosure into the closest contact with the appliance that the configuration of the dishwasher will allow. For standby mode and off mode testing, these products shall also be installed 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.
2.2Electrical energy supply.
2.2.1Dishwashers that operate with an electrical supply of 115 volts. Maintain the electrical supply to the dishwasher at 115 volts ±2 percent and within 1 percent of the nameplate frequency as specified by the manufacturer. Maintain a continuous electrical supply to the unit throughout testing, including the preconditioning cycles, specified in section 2.9 of this appendix, and in between all test cycles.
2.2.2Dishwashers that operate with an electrical supply of 240 volts. Maintain the electrical supply to the dishwasher at 240 volts ±2 percent and within 1 percent of the nameplate frequency as specified by the manufacturer. Maintain a continuous electrical supply to the unit throughout testing, including the preconditioning cycles, specified in section 2.9 of this appendix, and in between all test cycles.
2.2.3Supply voltage waveform. For the standby mode and off mode testing, maintain the electrical supply voltage waveform indicated in Section 4, Paragraph 4.3.2 of IEC 62301 (incorporated by reference; see § 430.3).
2.3Water temperature. Measure the temperature of the water supplied to the dishwasher using a temperature measuring device as specified in section 3.1 of this appendix.
2.3.1Dishwashers to be tested at a nominal 140 °F inlet water temperature. Maintain the water supply temperature at 140° ± 2 °F.
2.3.2Dishwashers to be tested at a nominal 120 °F inlet water temperature. Maintain the water supply temperature at 120° ± 2 °F.
2.3.3Dishwashers to be tested at a nominal 50 °F inlet water temperature. Maintain the water supply temperature at 50° ± 2 °F.
2.4Water pressure. Using a water pressure gauge as specified in section 3.4 of this appendix, maintain the pressure of the water supply at 35 ± 2.5 pounds per square inch gauge (psig) when the water is flowing. The pressure shall be achieved within 2 seconds of opening the water supply valve.
2.5Ambient temperature.
2.5.1Active mode ambient and machine temperature. Using a temperature measuring device as specified in section 3.1 of this appendix, maintain the room ambient air temperature at 75° ± 5 °F and ensure that the dishwasher and the test load are at room ambient temperature at the start of each test cycle.
2.5.2Standby mode and off mode ambient temperature. For standby mode and off mode testing, maintain room ambient air temperature conditions as specified in Section 4, Paragraph 4.2 of IEC 62301 (incorporated by reference; see § 430.3).
2.6Test cycle and load.
2.6.1Non-soil-sensing dishwashers to be tested at a nominal inlet temperature of 140 °F. All non-soil-sensing dishwashers to be tested according to section 4.1 of this appendix at a nominal inlet temperature of 140 °F must be tested on the normal cycle and truncated normal cycle without a test load if the dishwasher does not heat water in the normal cycle.
2.6.2Non-soil-sensing dishwashers to be tested at a nominal inlet temperature of 50 °F or 120 °F. All non-soil-sensing dishwashers to be tested according to section 4.1 of this appendix at a nominal inlet temperature of 50 °F or 120 °F must be tested on the normal cycle with a clean load of eight place settings plus six serving pieces, as specified in section 2.7 of this appendix. If the capacity of the dishwasher, as stated by the manufacturer, is less than eight place settings, then the test load must be the stated capacity.
2.6.3Soil-sensing dishwashers to be tested at a nominal inlet temperature of 50 °F, 120 °F, or 140 °F. All soil-sensing dishwashers shall be tested according to section 4.1 of this appendix on the normal cycle. The dishwasher shall be tested first for the sensor heavy response, then tested for the sensor medium response, and finally for the sensor light response with the following combinations of soiled and clean test loads.
2.6.3.1For tests of the sensor heavy response, as defined in section 1.16 of this appendix:
(A) For standard dishwashers, the test unit is to be loaded with a total of eight place settings plus six serving pieces as specified in section 2.7 of this appendix. Four of the eight place settings, except for the flatware, must be soiled according to sections 5.3 through 5.7 of ANSI/AHAM DW-1-2010 (incorporated by reference, see § 430.3) and as additionally specified in sections 2.7.4 and 2.7.5 of this appendix, while the remaining place settings, serving pieces, and all flatware are not soiled. The test load is to be loaded in the dishwasher according to section 5.8 of ANSI/AHAM DW-1-2010.
(B) For compact dishwashers, the test unit is to be loaded with four place settings plus six serving pieces as specified in section 2.7 of this appendix. Two of the four place settings, except for the flatware, must be soiled according to sections 5.3 through 5.7 of ANSI/AHAM DW-1-2010 and as additionally specified in sections 2.7.4 and 2.7.5 of this appendix, while the remaining place settings, serving pieces, and all flatware are not soiled. The test load is to be loaded in the dishwasher according to section 5.8 of ANSI/AHAM DW-1-2010.
2.6.3.2For tests of the sensor medium response, as defined in section 1.18 of this appendix:
(A) For standard dishwashers, the test unit is to be loaded with a total of eight place settings plus six serving pieces as specified in section 2.7 of this appendix. Two of the eight place settings, except for the flatware, must be soiled according to sections 5.3 through 5.7 of ANSI/AHAM DW-1-2010 (incorporated by reference, see § 430.3) and as additionally specified in sections 2.7.4 and 2.7.5 of this appendix, while the remaining place settings, serving pieces, and all flatware are not soiled. The test load is to be loaded in the dishwasher according to section 5.8 of ANSI/AHAM DW-1-2010.
(B) For compact dishwashers, the test unit is to be loaded with four place settings plus six serving pieces as specified in section 2.7 of this appendix. One of the four place settings, except for the flatware, must be soiled according to sections 5.3 through 5.7 of ANSI/AHAM DW-1-2010 and as additionally specified in sections 2.7.4 and 2.7.5 of this appendix, while the remaining place settings, serving pieces, and all flatware are not soiled. The test load is to be loaded in the dishwasher according to section 5.8 of ANSI/AHAM DW-1-2010.
2.6.3.3For tests of the sensor light response, as defined in section 1.17 of this appendix:
(A) For standard dishwashers, the test unit is to be loaded with a total of eight place settings plus six serving pieces as specified in section 2.7 of this appendix. One of the eight place settings, except for the flatware, must be soiled with half of the soil load specified for a single place setting according to sections 5.3 through 5.7 of ANSI/AHAM DW-1-2010 (incorporated by reference, see § 430.3) and as additionally specified in sections 2.7.4 and 2.7.5 of this appendix, while the remaining place settings, serving pieces, and all flatware are not soiled. The test load is to be loaded in the dishwasher according to section 5.8 of ANSI/AHAM DW-1-2010.
(B) For compact dishwashers, the test unit is to be loaded with four place settings plus six serving pieces as specified in section 2.7 of this appendix. One of the four place settings, except for the flatware, must be soiled with half of the soil load specified for a single place setting according to sections 5.3 through 5.7 of ANSI/AHAM DW-1-2010 and as additionally specified in sections 2.7.4 and 2.7.5 of this appendix, while the remaining place settings, serving pieces, and all flatware are not soiled. The test load is to be loaded in the dishwasher according to section 5.8 of ANSI/AHAM DW-1-2010.
2.7Test load.
2.7.1Test load items.
Dishware/glassware/flatware item Primary source Description Primary No. Alternate source Alternate source No.
Dinner Plate Corning Comcor®/Corelle® 10 inch Dinner Plate 6003893
Bread and Butter Plate Corning Comcor®/Corelle® 6.75 inch Bread & Butter 6003887 Arzberg 8500217100 or 2000-00001-0217-1
Fruit Bowl Corning Comcor®/Corelle® 10 oz. Dessert Bowl 6003899 Arzberg 3820513100
Cup Corning Comcor®/Corelle® 8 oz. Ceramic Cup 6014162 Arzberg 1382-00001-4732
Saucer Corning Comcor®/Corelle® 6 inch Saucer 6010972 Arzberg 1382-00001-4731
Serving Bowl Corning Comcor®/Corelle® 1 qt. Serving Bowl 6003911
Platter Corning Comcor®/Corelle® 9.5 inch Oval Platter 6011655
Glass—Iced Tea Libbey 551 HT
Flatware—Knife Oneida®—Accent 2619KPVF WMF—Gastro 0800 12.0803.6047
Flatware—Dinner Fork Oneida®—Accent 2619FRSF WMF—Signum 1900 12.1905.6040
Flatware—Salad Fork Oneida®—Accent 2619FSLF WMF—Signum 1900 12.1964.6040
Flatware—Teaspoon Oneida®—Accent 2619STSF WMF—Signum 1900 12.1910.6040
Flatware—Serving Fork Oneida®—Flight 2865FCM WMF—Signum 1900 12.1902.6040
Flatware—Serving Spoon Oneida®—Accent 2619STBF WMF—Signum 1900 12.1904.6040
2.7.2Place setting. A place setting shall consist of one cup, one saucer, one dinner plate, one bread and butter plate, one fruit bowl, one iced tea glass, one dinner fork, one salad fork, one knife, and two teaspoons.
2.7.3Serving pieces. Serving pieces shall consist of two serving bowls, one platter, one serving fork, and two serving spoons.
2.7.4Soils. The soils shall be as specified in section 5.4 of ANSI/AHAM DW-1-2010 (incorporated by reference, see § 430.3), except for the following substitutions.
2.7.4.1Margarine. The margarine shall be Fleischmann's Original stick margarine.
2.7.4.2Coffee. The coffee shall be Folgers Classic Decaf.
2.7.5Soil Preparation. Soils shall be prepared according to section 5.5 of ANSI/AHAM DW-1-2010 (incorporated by reference, see § 430.3), with the following additional specifications.
2.7.5.1Milk. The nonfat dry milk shall be reconstituted before mixing with the oatmeal and potatoes. It shall be reconstituted with water by mixing 2/3 cup of nonfat dry milk with 2 cups of water until well mixed. The reconstituted milk may be stored for use over the course of 1 day.
2.7.5.2Instant mashed potatoes. The potato mixture shall be applied within 30 minutes of preparation.
2.7.5.3Ground beef. The 1-pound packages of ground beef shall be stored frozen for no more than 6 months.
2.8Testing requirements. Provisions in this appendix pertaining to dishwashers that operate with a nominal inlet temperature of 50 °F or 120 °F apply only to water-heating dishwashers as defined in section 1.26 of this appendix.
2.9Preconditioning requirements. Precondition the dishwasher twice by establishing the testing conditions set forth in sections 2.1 through 2.5 of this appendix. For each preconditioning, set the dishwasher to the preconditioning cycle as defined in section 1.15 of this appendix, without using a test load, and initiate the cycle. During the second preconditioning, measure the prewash fill water volume, Vpw, if any, and the main wash fill water volume, Vmw.
2.10Detergent. Use half the quantity of detergent specified according to section 4.1 of ANSI/AHAM DW-1-2010 (incorporated by reference, see § 430.3), using Cascade with the Grease Fighting Power of Dawn powder as the detergent formulation. Determine the amount of detergent (in grams) to be added to the prewash compartment (if provided) or elsewhere in the dishwasher (if recommended by the manufacturer) and the main wash compartment according to sections 2.10.1 and 2.10.2 of this appendix.
2.10.1Prewash Detergent Dosing. If the cycle setting for the test cycle includes prewash, determine the quantity of dry prewash detergent, Dpw, in grams (g) that results in 0.25 percent concentration by mass in the prewash fill water as:
Dpw = Vpw × ρ × k × 0.25/100
where,
Vpw = the prewash fill volume of water in gallons,
ρ = water density = 8.343 pounds (lb)/gallon for dishwashers to be tested at a nominal inlet water temperature of 50 °F (10 °C), 8.250 lb/gallon for dishwashers to be tested at a nominal inlet water temperature of 120 °F (49 °C), and 8.205 lb/gallon for dishwashers to be tested at a nominal inlet water temperature of 140 °F (60 °C), and
k = conversion factor from lb to g = 453.6 g/lb.
2.10.2Main Wash Detergent Dosing. Determine the quantity of dry main wash detergent, Dmw, in grams (g) that results in 0.25 percent concentration by mass in the main wash fill water as:
Dmw = Vmw × ρ × k × 0.25/100
where,
Vmw = the main wash fill volume of water in gallons, and
ρ, and k are defined in section 2.10.1 of this appendix.
3. Instrumentation
Test instruments must be calibrated annually.
3.1Temperature measuring device. The device must have an error no greater than ± 1 °F over the range being measured.
3.2Timer. Time measurements for each monitoring period shall be accurate to within 2 seconds.
3.3Water meter. The water meter must have a resolution of no larger than 0.1 gallons and a maximum error no greater than ± 1.5 percent of the measured flow rate for all water temperatures encountered in the test cycle.
3.4Water pressure gauge. The water pressure gauge must have a resolution of one pound per square inch (psi) and must have an error no greater than 5 percent of any measured value over the range of 35 ± 2.5 psig.
3.5Watt-hour meter. The watt-hour meter must have a resolution of .1 watt-hour or less and a maximum error of no more than 1 percent of the measured value for any demand greater than 5 watts.
3.6Standby mode and off mode watt meter. The watt meter used to measure standby mode and off mode power consumption shall meet the requirements specified in Section 4, Paragraph 4.4 of IEC 62301 (incorporated by reference, see § 430.3).
4. Test Cycle and Measurements
4.1Active mode cycle. Perform a test cycle by establishing the testing conditions set forth in section 2 of this appendix, setting the dishwasher to the cycle type to be tested according to section 2.6.1, 2.6.2, or 2.6.3 of this appendix, initiating the cycle, and allowing the cycle to proceed to completion.
4.1.1Machine electrical energy consumption. Measure the machine electrical energy consumption, M, expressed as the number of kilowatt-hours of electricity consumed by the machine during the entire test cycle, using a water supply temperature as set forth in section 2.3 of this appendix and using a watt-hour meter as specified in section 3.5 of this appendix.
4.1.2Fan electrical energy consumption. If the dishwasher is capable of operation in fan-only mode, measure the fan electrical energy consumption, MF, expressed as the number of kilowatt-hours of electricity consumed by the machine for the duration of fan-only mode, using a watt-hour meter as specified in section 3.5 of this appendix. Alternatively, if the duration of fan-only mode is known, the watt-hours consumed may be measured for a period of 10 minutes in fan-only mode, using a watt-hour meter as specified in section 3.5 of this appendix. Multiply this value by the time in minutes that the dishwasher remains in fan-only mode, LF, and divide by 10,000 to obtain MF. The alternative approach may be used only if the resulting MF is representative of energy use during the entire fan-only mode.
4.1.3Water consumption. Measure the water consumption, V, expressed as the number of gallons of water delivered to the machine during the entire test cycle, using a water meter specified in section 3.3 of this appendix.
4.2Standby mode and off mode power. Connect the dishwasher to a standby mode and off mode watt meter as specified in section 3.6 of this appendix. Establish the testing conditions set forth in sections 2.1, 2.2, and 2.5.2 of this appendix. For dishwashers that take some time to enter a stable 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 dishwasher to reach the lower power state before proceeding with the test measurement. Follow the test procedure specified in Section 5, Paragraph 5.3.2 of IEC 62301 for testing in each possible mode as described in sections 4.2.1 and 4.2.2 of this appendix.
4.2.1If the dishwasher has an inactive mode, as defined in section 1.10 of this appendix, measure and record the average inactive mode power of the dishwasher, PIA, in watts.
4.2.2If the dishwasher has an off mode, as defined in section 1.13 of this appendix, measure and record the average off mode power, POM, in watts.
5. Calculation of Derived Results From Test Measurements
5.1Machine energy consumption.
5.1.1Machine energy consumption for non-soil-sensing electric dishwashers. Take the value recorded in section 4.1.1 of this appendix as the per-cycle machine electrical energy consumption. Express the value, M, in kilowatt-hours per cycle.
5.1.2Machine energy consumption for soil-sensing electric dishwashers. The machine energy consumption for the sensor normal cycle, M, is defined as:
M = (Mhr × Fhr) (Mmr × Fmr) (Mlr × Flr)
where,
Mhr = the value recorded in section 4.1.1 of this appendix for the test of the sensor heavy response, expressed in kilowatt-hours per cycle,
Mmr = the value recorded in section 4.1.1 of this appendix for the test of the sensor medium response, expressed in kilowatt-hours per cycle,
Mlr = the value recorded in section 4.1.1 of this appendix for the test of the sensor light response, expressed in kilowatt-hours per cycle,
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.
5.1.3Machine energy consumption during water softener regeneration for water-softening dishwashers. The machine energy consumption for water softener regeneration, MWS, is defined as:
MWS = MWScycle × NWS/N
where,
MWScycle = the reported value of the additional machine electrical energy consumption required for water softener regeneration during a cycle including water softener regeneration, expressed in kilowatt-hours,
NWS = the reported representative average number of water softener regeneration cycles per year, and
N = the representative average dishwasher use of 215 cycles per year.
5.2Fan-only mode energy consumption.
5.2.1Electrical energy consumption for fan-only mode for non-soil-sensing electric dishwashers. Take the value recorded in section 4.1.2 of this appendix as the per-cycle electrical energy consumption for fan-only mode. Express the value, EF, in kilowatt-hours per cycle. If the dishwasher is not capable of operation in fan-only mode, EF = 0.
5.2.2Electrical energy consumption for fan-only mode for soil-sensing electric dishwashers. The fan-only mode electrical energy consumption, EF, for the sensor normal cycle is defined as:
EF = (EFhr EFmr EFlr)/3
where,
EFhr = the value recorded in section 4.1.2 of this appendix for the test of the sensor heavy response, expressed in kilowatt-hours per cycle,
EFmr = the value recorded in section 4.1.2 of this appendix for the test of the sensor medium response, expressed in kilowatt-hours per cycle,
EFlr = the value recorded in section 4.1.2 of this appendix for the test of the sensor light response, expressed in kilowatt-hours per cycle,
If the dishwasher is not capable of operation in fan-only mode, EF = 0.
5.3Drying energy.
5.3.1Drying energy consumption for non-soil-sensing electric dishwashers. Calculate the amount of energy consumed using the power-dry feature after the termination of the last rinse option of the normal cycle. Express the value, ED, in kilowatt-hours per cycle.
5.3.2Drying energy consumption for soil-sensing electric dishwashers. The drying energy consumption, ED, for the sensor normal cycle is defined as:
ED = (EDhr EDmr EDlr)/3
where,
EDhr = energy consumed using the power-dry feature after the termination of the last rinse option of the sensor heavy response, expressed in kilowatt-hours per cycle,
EDmr = energy consumed using the power-dry feature after the termination of the last rinse option of the sensor medium response, expressed in kilowatt-hours per cycle,
EDlr = energy consumed using the power-dry feature after the termination of the last rinse option of the sensor light response, expressed in kilowatt-hours per cycle,
5.4Water consumption.
5.4.1Water consumption for non-soil-sensing electric dishwashers using electrically heated, gas-heated, or oil-heated water. Take the value recorded in section 4.1.3 of this appendix as the per-cycle water consumption. Express the value, V, in gallons per cycle.
5.4.2Water consumption for soil-sensing electric dishwashers using electrically heated, gas-heated, or oil-heated water. The water consumption for the sensor normal cycle, V, is defined as:
V = (Vhr × Fhr) (Vmr × Fmr) (Vlr × Flr)
where,
Vhr = the value recorded in section 4.1.3 of this appendix for the test of the sensor heavy response, expressed in gallons per cycle,
Vmr = the value recorded in section 4.1.3 of this appendix for the test of the sensor medium response, expressed in gallons per cycle,
Vlr = the value recorded in section 4.1.3 of this appendix for the test of the sensor light response, expressed in gallons per cycle,
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.
5.4.3Water consumption during water softener regeneration for water-softening dishwashers using electrically heated, gas-heated, or oil-heated water. The water consumption for water softener regeneration, VWS, is defined as:
VWS = VWScycle × NWS/N
where,
VWScycle = the reported value of the additional water consumption required for water softener regeneration during a cycle including water softener regeneration, expressed in gallons per cycle,
NWS = the reported representative average number of water softener regeneration cycles per year, and
N = the representative average dishwasher use of 215 cycles per year.
5.5Water energy consumption for non-soil-sensing or soil-sensing dishwashers using electrically heated water.
5.5.1Dishwashers that operate with a nominal 140 °F inlet water temperature, only.
5.5.1.1Calculate the water energy consumption, W, expressed in kilowatt-hours per cycle and defined as:
W = V × T × K
where,
V = water consumption in gallons per cycle, as determined in section 5.4.1 of this appendix for non-soil-sensing dishwashers and section 5.4.2 of this appendix for soil-sensing dishwashers,
T = nominal water heater temperature rise = 90 °F, and
K = specific heat of water in kilowatt-hours per gallon per degree Fahrenheit = 0.0024.
5.5.1.2For water-softening dishwashers, calculate the water softener regeneration water energy consumption, WWS, expressed in kilowatt-hours per cycle and defined as:
WWS = VWS × T × K
where,
VWS = water consumption during water softener regeneration in gallons per cycle which includes regeneration, as determined in section 5.4.3 of this appendix,
T = nominal water heater temperature rise = 90 °F, and
K = specific heat of water in kilowatt-hours per gallon per degree Fahrenheit = 0.0024.
5.5.2Dishwashers that operate with a nominal inlet water temperature of 120 °F.
5.5.2.1Calculate the water energy consumption, W, expressed in kilowatt-hours per cycle and defined as:
W = V × T × K
where,
V = water consumption in gallons per cycle, as determined in section 5.4.1 of this appendix for non-soil-sensing dishwashers and section 5.4.2 of this appendix for soil-sensing dishwashers,
T = nominal water heater temperature rise = 70 °F, and
K = specific heat of water in kilowatt-hours per gallon per degree Fahrenheit = 0.0024,
5.5.2.2For water-softening dishwashers, calculate the water softener regeneration water energy consumption, WWS, expressed in kilowatt-hours per cycle and defined as:
WWS = VWS × T × K
where,
VWS = water consumption during water softener regeneration in gallons per cycle which includes regeneration, as determined in section 5.4.3 of this appendix,
T = nominal water heater temperature rise = 70 °F, and
K = specific heat of water in kilowatt-hours per gallon per degree Fahrenheit = 0.0024.
5.6Water energy consumption per cycle using gas-heated or oil-heated water.
5.6.1Dishwashers that operate with a nominal 140 °F inlet water temperature, only.
5.6.1.1Calculate the water energy consumption using gas-heated or oil-heated water, Wg, expressed in Btu's per cycle and defined as:
Wg= V × T × C/e
where,
V = water consumption in gallons per cycle, as determined in section 5.4.1 of this appendix for non-soil-sensing dishwashers and section 5.4.2 of this appendix for soil-sensing dishwashers,
T = nominal water heater temperature rise = 90 °F,
C = specific heat of water in Btu's per gallon per degree Fahrenheit = 8.2, and
e = nominal gas or oil water heater recovery efficiency = 0.75,
5.6.1.2For water-softening dishwashers, calculate the water softener regeneration water energy consumption, WWSg, expressed in kilowatt-hours per cycle and defined as:
WWSg = VWS × T × C/e
where,
VWS = water consumption during water softener regeneration in gallons per cycle which includes regeneration, as determined in section 5.4.3 of this appendix,
T = nominal water heater temperature rise = 90 °F,
C = specific heat of water in Btu's per gallon per degree Fahrenheit = 8.2, and
e = nominal gas or oil water heater recovery efficiency = 0.75.
5.6.2Dishwashers that operate with a nominal 120 °F inlet water temperature, only.
5.6.2.1Calculate the water energy consumption using gas-heated or oil-heated water, Wg, expressed in Btu's per cycle and defined as:
Wg = V × T × C/e
where,
V = water consumption in gallons per cycle, as determined in section 5.4.1 of this appendix for non-soil-sensing dishwashers and section 5.4.2 of this appendix for soil-sensing dishwashers,
T = nominal water heater temperature rise = 70 °F,
C = specific heat of water in Btu's per gallon per degree Fahrenheit = 8.2, and
e = nominal gas or oil water heater recovery efficiency = 0.75.
5.6.2.2For water-softening dishwashers, calculate the water softener regeneration water energy consumption, WWSg, expressed in kilowatt-hours per cycle and defined as:
WWSg = VWS × T × C/e
where,
VWS = water consumption during water softener regeneration in gallons per cycle which includes regeneration, as determined in section 5.4.3 of this appendix,
T = nominal water heater temperature rise = 70 °F,
C = specific heat of water in Btu's per gallon per degree Fahrenheit = 8.2, and
e = nominal gas or oil water heater recovery efficiency = 0.75.
5.7Annual combined low-power mode energy consumption. Calculate the annual combined low-power mode energy consumption for dishwashers, ETLP, expressed in kilowatt-hours per year, according to the following:
ETLP = [(PIA × SIA) (POM × SOM)] × K
where:
PIA = dishwasher inactive mode power, in watts, as measured in section 4.2.1 of this appendix for dishwashers capable of operating in inactive mode; otherwise, PIA = 0,
POM = dishwasher off mode power, in watts, as measured in section 4.2.2 of this appendix for dishwashers capable of operating in off mode; otherwise, POM = 0,
SIA = annual hours in inactive mode as defined as SLP if no off mode is possible, [SLP/2] if both inactive mode and off mode are possible, and 0 if no inactive mode is possible,
SOM = annual hours in off mode as defined as SLP if no inactive mode is possible, [SLP/2] if both inactive mode and off mode are possible, and 0 if no off mode is possible,
SLP = combined low-power annual hours for all available modes other than active mode as defined as [H − (N × (L LF))] for dishwashers capable of operating in fan-only mode; otherwise, SLP = 8,465,
H = the total number of hours per year = 8766 hours per year,
N = the representative average dishwasher use of 215 cycles per year,
L = the average of the duration of the normal cycle and truncated normal cycle, for non-soil-sensing dishwashers with a truncated normal cycle; the duration of the normal cycle, for non-soil-sensing dishwashers without a truncated normal cycle; the average duration of the sensor light response, truncated sensor light response, sensor medium response, truncated sensor medium response, sensor heavy response, and truncated sensor heavy response, for soil-sensing dishwashers with a truncated cycle option; the average duration of the sensor light response, sensor medium response, and sensor heavy response, for soil-sensing dishwashers without a truncated cycle option,
LF = the duration of the fan-only mode for the normal cycle for non-soil-sensing dishwashers; the average duration of the fan-only mode for sensor light response, sensor medium response, and sensor heavy response for soil-sensing dishwashers, and
K = 0.001 kWh/Wh conversion factor for watt-hours to kilowatt-hours.
[77 FR 65982, Oct. 31, 2012]

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    1. 79 FR 43927 - Energy Conservation Program for Consumer Products: Energy Conservation Standards for Residential Furnaces; Energy Conservation Standards for Residential Direct Heating Equipment
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    1. 79 FR 65603 - Energy Conservation Program: Energy Conservation Standards for Residential Central Air Conditioners and Heat Pumps; Request for Information
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