during the operation of the automatic defrost system.

1.8 "Long-time Automatic Defrost" means an automatic defrost system where successive defrost cycles are separated by 14 hours or more of compressor-operating time.

1.9 "Stabilization Period" means the total period of time during which steadystate conditions are being attained or evaluated.

2. Test Conditions.

2.1 Ambient temperature. The ambient temperature shall be 90.0±1.0° F. (32.2±0.6° C.) during the stabilization period and during the test period.

2.2 Operational conditions. The freezer shall be installed and its operating conditions maintained in accordance with HRF1-1979, section 7.2 through section 7.4.3.3, except that the vertical ambient gradient at locations 10 inches (25.4 cm) out from the the centers of the two sides of the unit being tested is to be maintained during the test. Unless the area is obstructed by shields or baffles, the gradient is to be maintained from 2 inches (5.1 cm) above the floor or supporting platform to a height one foot (30.5 cm) above the unit under test. Defrost controls are to be operative and the antisweat heater switch is to be "on" during one test and "off" during a second test.

2.3 Steady State Condition. Steady state conditions exist if the temperature measurements taken at four minute intervals or less during a stabilization period are not changing at a rate greater than 0.042° F. (0.023° C.) per hour as determined by the applicable condition of A or B.

A-The average of the measurements

during a two hour period if no cycling occurs or during a number of complete repetitive compressor cycles through a period of no less than two hours is compared to the average over an equivalent time period with three hours elapsed between the two measurement periods. B-If A above cannot be used, the average

of the measurements during a number of complete repetitive compressor cycles through period of no less than two hours and including the last complete cycle prior to a defrost period, or if no cycling occurs, the average of the measurements during the last two hours prior to a defrost period; are compared to the same averaging period prior to the following defrost period.

3. Test Control Settings.

3.1 Model with no user operable temperature control. A test shall be performed during which the compartment temperature and energy use shall be measured. A second test shall be performed with the tempera

ture control electrically short circuited to cause the compressor to run continuously.

3.2 Model with user operable temperature control. Testing shall be performed in accordance with one of the following sections using the standardized temperature of 0.0° F. (-17.8° C.).

3.2.1 A first test shall be performed with all temperature controls set at their median position midway between their warmest and coldest settings. Knob detents shall be mechanically defeated if necessary to attain a median setting. A second test shall be performed with all controls set at either their warmest or their coldest setting (not electrically or mechanically bypassed), whichever is appropriate, to attempt to achieve compartment temperatures measured during the two tests which bound (i.e., one is above and one is below) the standardized temperature. If the compartment temperatures measured during these two tests bound the standardized temperature, then these test results shall be used to determine energy consumption. If the compartment temperature measured with all controls set at their coldest setting is above the standardized temperature, a third test shall be performed with all controls set at their warmest setting and the result of this test shall be used with the result of the test performed with all controls set at their coldest setting to determine energy consumption. If the compartment temperature measured with all controls set at their warmest setting is below the standardized temperature; then the result of this test alone will be used to determine energy consumption.

3.2.2 Alternatively, a first test may be performed with all temperature controls set at their warmest setting. If the compartment temperature is below the standardized temperature, then the result of this test alone will be used to determine energy consumption. If the above condition is not met, then the unit shall be tested in accordance with 3.2.1 above.

3.2.3 Alternatively, a first test may be performed with all temperature controls set at their coldest setting. If the compartment temperature is above the standardized temperature, a second test shall be performed with all controls set at their warmest setting and the results of these two tests shall be used to determine energy consumption. If the above condition is not met, then the unit shall be tested in accordance with 3.2.1 above.

4. Test Period.

4.1 Test Period. Tests shall be performed by establishing the conditions set forth in Section 2 and using control settings as set forth in Section 3 above.

4.1.1 Nonautomatic Defrost. If the model being tested has no automatic defrost

system, the test time period shall start after steady state conditions have been achieved, and be of not less than three hours' duration. During the test period the compressor motor shall complete two or more whole cycles (a compressor cycle is a complete "on" and a complete "off" period of the motor). If no "off" cycling will occur, as determined during the stabilization period, the test period shall be three hours. If incomplete cycling (less than two compressor cycles) occurs during a 24 hour period, the results of the 24 hour period shall be used. 4.1.2 Automatic Defrost. If the model being tested has an automatic defrost system, the test time period shall start after steady state conditions have been achieved and be from one point during a defrost period to the same point during the next defrost period. If the model being tested has a long-time automatic defrost system, the alternate provisions of 4.1.2.1 may be used.

4.1.2.1 Long-time Automatic Defrost. If the model being tested has a long-time automatic defrost system, the test time period may consist of two parts. A first part would be the same as the test for a unit having no defrost provisions (section 4.1.1). The second part would start when a defrost period is initiated during a compressor "on" cycle and terminate at the second turn "on" of the compressor motor or after four hours, whichever comes first.

5. Test Measurements.

5.1 Temperature Measurements. Temperature measurements shall be made at the locations prescribed in Figure 7-2 of HRF-11979 and shall be accurate to within ±0.5° F. (0.3° C.) of true value.

5.1.1 Measured Temperature. The measured temperature is to be the average of all sensor temperature readings taken at a particular time. Measurements shall be taken at regular intervals not to exceed four minutes.

5.1.2 Compartment Temperature. The compartment temperature for each test period shall be an average of the measured temperatures taken during a complete cycle or several complete cycles of the compressor motor (one compressor cycle is one complete motor "on" and one complete motor "off" period). For long-time automatic defrost models, compartment temperature shall be that measured in the first part of the test period specified in 4.1.1.

5.1.2.1 The number of complete compressor motor cycles over which the measured temperatures in a compartment are to be averaged to determine compartment temperature shall be equal to the number of minutes between measured temperature readings rounded up to the next whole minute or a number of complete cycles over a time period exceeding one hour. One of

the cycles shall be the last complete compressor motor cycles during the test period.

5.1.2.2 If no compressor motor cycling occurs, the compartment temperature shall be the average of the measured temperatures taken during the last thirty-two minutes of the test period.

5.1.2.3 If incomplete cycling occurs (less than one cycle) the compartment temperature shall be the average of all readings taken during the last three hours of the last complete "on" period.

5.2 Energy Measurements:

5.2.1 Per-day Energy Consumption. The energy consumption in kilowatt-hours per day for each test period shall be the energy expended during the test period as specified in section 4.1 adjusted to a 24 hour period. The adjustment shall be determined as follows:

5.2.1.1 Nonautomatic and automatic defrost models. The energy consumption in kilowatt-hours per day shall be calculated equivalent to:

ET=(EP×1440×K)/T where

ET, 1440, and K are defined in 5.2.1.1 EP1-energy expended in kilowatt-hours during the first part of the test. EP2 energy expended in kilowatt-hours during the second part of the test, CT Defrost timer run time in hours required to cause it to go through a complete cycle, to the nearest tenth hour per cycle,

12 conversion factor to adjust for a 50% run time of the compressor in hours per day, and

T1 and T2 length of time in minutes of the first and second test parts respectively.

5.3 Volume measurements. The total refrigerated volume, VT, shall be measured in accordance with HRF-1-1979, section 3.20 and section 5.1 through 5.3.

1.2 "Cycle type" means any complete sequence of operations capable of being preset on the dishwasher prior to the initiation of machine operation.

1.3 "Normal cycle" means the cycle type recommended by the manufacturer for completely washing a full load of normally soiled dishes including the power-dry feature.

1.4 "Power-dry feature" means that function in a cycle in which electrically generated heat is introduced into the washing chamber for the purpose of improving the drying performance of the dishwasher.

1.5 "Truncated normal cycle" means the normal cycle interrupted to eliminate the power-dry feature after the termination of the last rinse operation.

1.6 "Water Heating Dishwasher" means a dishwasher which is designed for hearing cold inlet water (nominal 50° F) or a dishwasher for which the manufacturer recommends operation with a nominal inlet water temperature of 120 °F, and may operate at either of these inlet water temperatures by providing internal water heating to above 120 °F in at least one wash phase of the normal cycle.

2. Testing conditions: 2.1 Installation. Install the dishwasher in accordance with the manufacturer's instruction, except that undercounter dishwashers need not be installed under a counter.

2.2 Electrical supply.

2.2.1 Dishwashers that operate with an electrical supply of 115 volts. Maintain the electrical supply to the dishwasher within two percent of 115 volts and within one percent of the nameplate frequency as specified by the manufacturer.

2.2.2 Dishwashers that operate with an electricial supply of 240 volts. Maintain the electrical supply to the dishwasher within two percent of 240 volts and within one percent of its nameplate frequency as specified by the manufacturer.

2.3 Water temperature.

2.3.1 Dishwashers to be tested at a nominal 140°F inlet water temperature. Maintain the water supply temperature between 135°F and 145°F.

2.3.2 Dishwashers to be tested at a nominal 120°F inlet water temperature. Maintain the water supply temperature between 118°F and 122°F.

2.3.3 Dishwashers to be tested at a nominal 50°F inlet water temperature. Maintain the water supply temperature between 48°F and 52° F.

2.4 Water pressure. Maintain the pressure of the water supply between 32.5 and 37.5 pounds per square inch.

2.5 Ambient and machine temperature. Maintain the room ambient air temperature between 70°F and 85°F, and assure that the dishwasher and the test load are at room

30-032 0-89-3

ambient temperature at the start of each test cycle.

2.6 Load.

2.6.1 Dishwashers to be tested at a nominal 140° F inlet water temperature. The dishwasher shall be tested on the normal cycle and the truncated normal cycle without a test load.

2.6.2 Dishwashers to be tested at a nominal inlet water temperature of 50°F or 120°F. The dishwasher shall be tested or normal cycle and the truncated normal cycle with a test load of eight place settings plus six serving pieces as specified in section 6.1.1 of AHAM Standard DW-1. If the capacity of the dishwasher, as stated by the manufacturer, is less than eight place setting then the test load shall be that capacity.

2.7 Testing requirements. Provisions in this Appendix pertaining to dishwashers which operate with a nominal inlet temperature of 50° F or 120° F shall apply only to water heating dishwashers.

3. Test cycle and measurements.

3.1 Test cycle. Perform a test cycle by establishing the testing conditions set forth in 2 of this Appendix, setting the dishwasher to the cycle type to be tested, initiating the cycle and allowing the cycle to proceed to completion.

3.2 tion.

Machine electrical energy consump

3.2.1 Dishwashers that operate with a nominal 140°F inlet water temperature, only. Measure the machine electrical energy consumption, M, specified as the number of kilowatt-hours of electrical energy consumed during the entire test cycle using a water supply temperature as set forth in 2.3.1 of this Appendix. Use a kilowatt-hour meter having a resolution no larger than 0.001 kilowatt hours and a maximum error no greater than one percent.

3.2.2 Dishwashers that operate with a nominal inlet water temperature of 120°F. Measure the machine electrical energy consumption, M, specified as the number of kilowatt-hours of electrical energy consumed during the entire test cycle using a water supply temperature as set forth in 2.3.2 of this Appendix. Use a kilowatt-hour meter having a resolution no larger than 0.001 kilowatt-hours and a maximum error no greater than one percent.

3.3 Water consumption. Measure the water consumption specified as the number of gallons delivered to the dishwasher during the entire test cycle, using a water meter having a resolution no larger than 0.1 gallon and a maximum error no greater than 1.5 percent for all water flow rates from one to five gallons per minute and for all water temperatures encountered in the test cycle.

3.4 Report values. State the reported values of machine electrical energy consumption and water consumption as measured.

4. Calculation of derived results from test measurements: 4.1 Per-cycle water energy consumption using electrically heated water.

4.1.1 Dishwashers that operate with a nominal 140 F inlet water temperature, only. Calculate for the cycle type under test the per-cycle water energy consumption using electrically heated water, We, expressed in kilowatt-hours per cycle and defined as:

W. VXTXK,

where

V reported water consumption in gallons per cycle for the cycle type under test. T=nominal water heater temperature

rise 90°F.

K specific heat of water in kilowatt-hours per gallon per degree Fahrenheit 0.00240.

4.1.2 Dishwashers that operate with a nominal inlet water temperature of 120°F. Calculate for the cycle type under test the per cycle water energy consumption using electrically heated water, We, expressed in kilowatt-hours per cycle and defined as:

We VXT'>K

where

V and K are defined in 4.1.1 of this Appendix and T'-nominal water heated temperature rise = 70°F.

4.2 Per cycle water energy consumption using gas-heated or oil-heated water.

4.2.1 Dishwashers that operate with a nominal 140°F inlet water temperature, only. Calculate for the cycle type under test the per cycle water energy consumption using gas-heated or oil-heated water, We, expressed in Btu's per cycle and defined as: Wg=VXTXC/e.

where

V and T are defined in 4.1.1 of this Appendix, and

C-specific heat of water in Btu's per gallon per degree fahrenheit = 8.20

e=nominal gas or oil water heater recovery efficiency = 0.75.

4.2.2 Dishwashers that operate with a nominal inlet water temperature of 120° F. Calculate for the cycle type under test the per cycle water energy consumption using gas-heated or oil-heated water, Wg, expressed in Btu's per cycle and defined as:

W=V T' × C/e

where

V and T' are defined in 4.1.2 of this Appendix, and C and e are defined in 4.2.1 of this Appendix.

4.3 Per-cycle machine electrical energy consumption.

4.3.1 Dishwashers that operate with a nominal 140 F inlet water temperature, only. Use the measured value recorded in 3.2.1 as the per-cycle machine electrical energy consumption, M, expressed in kilowatt-hours per cycle.

4.3.2 Dishwashers that operate with a nominal inlet water temperature of 120° F. Use the measured value recorded in 3.2.2 as the per-cycle machine electrical energy consumption, M, expressed in kilowatt-hours per cycle.

a

4.3.3 Dishwashers that operate with nominal inlet water temperature of 50°F. Use the measured value recorded at 3.2.3 as the per-cycle machine electrical consumption, M, expressed in kilowatt-hours percycle.

4.4 Total per-cycle energy consumption. Calculate for the cycle type under test the total per-cycle energy consumption, E, expressed in kilowatt-hours per cycle, and defined as the sum of the per-cycle machine electrical energy consumption, M, plus the per-cycle water energy consumption of electrically-heated water, W, calculated for the cycle type, determined according to 4.3 and 4.1 respectively.

[48 FR 9206, Mar. 3, 1983, as amended at 49 FR 46536, Nov. 27, 1984; 49 FR 47479, Dec. 5, 1984; 52 FR 47551, Dec. 15, 1987]

APPENDIX D TO SUBPART B OF PART 430-UNIFORM TEST METHOD FOR MEASURING THE ENERGY CONSUMPTION OF CLOTHES DRYERS

1. DEFINITIONS

1.1 "AHAM" means the Association of Home Appliance Manufacturers.

1.2 "Bone dry" means a condition of a load of test clothes which 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.

1.3 "Compact" or compact size" means a clothes dryer with a drum capacity of less than 4.4 cubic feet.

1.4 "Cool down" means that portion of the clothes drying cycle when the added gas or electric heat is terminated and the clothes continue to tumble and dry within the drum.

1.5 "Cycle" means a sequence of operation of a clothes dryer which performs a clothes drying operation, and may include variations or combinations of the functions of heating, tumbling and drying.

1.6 "Drum capacity" means the volume of the drying drum in cubic feet.

1.7 "HLD-1" means the test standard promulgated by AHAM and titled "AHAM Performance Evaluation Procedure for Household Tumble Type Clothes Dryers", June 1974, and designated as HLD-1.

1.8 "HLD-2EC" means the test standard promulgated by AHAM and titled "Test Method for Measuring Energy Consumption of Household Tumble Туре Clothes Dryers," December 1975, and designated as HLD-2EC.

1.9 "Standard size" means a clothes dryer with a drum capacity of 4.4 cubic feet or greater.

1.10 "Moisture content" means the ratio of the weight of water contained by the test load to the bone-dry weight of the test load, expressed as a percent.

1.11 "Automatic termination control" means a dryer control system with a sensor which monitors either the dryer load temperature or its moisture content and with a controller which automatically terminates the drying process. A mark or detent which indicates a preferred automatic termination control setting must be present if the dryer is to be classified as having an "automatic termination control." A mark is a visible single control setting on one or more dryer controls.

1.12 "Temperature sensing control" means a system which monitors dryer exhaust air temperature and automatically terminates the dryer cycle.

1.13 "Moisture sensing control" means a system which utilizes a moisture sensing element within the dryer drum that monitors the amount of moisture in the clothes and automatically terminates the dryer cycle.

2. TESTING CONDITIONS

2.1 Installation. Install the clothes dryer in accordance with manufacturer's instructions. The dryer exhaust shall be restricted by adding the AHAM exhaust simulator described in 3.3.5 of HLD-1. All external joints should be taped to avoid air leakage. Disconnect all console light or other lighting systems on the clothes dryer which do not consume more than 10 watts during the clothes dryer test cycle.

2.2 Ambient temperature and humidity. Maintain the room ambient air temperature