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

Appendix B to Subpart B of Part 430 - Uniform Test Method for Measuring the Energy Consumption of Freezers
Note:

Prior to April 11, 2022, any representations of volume and energy use of freezers must be based on the results of testing pursuant to either this appendix or the procedures in appendix B as it appeared at 10 CFR part 430, subpart B, appendix B, in the 10 CFR parts 200 to 499 edition revised as of January 1, 2019. Any representations of volume and energy use must be in accordance with whichever version is selected. On or after April 11, 2022, any representations of volume and energy use must be based on the results of testing pursuant to this appendix.

For freezers, the rounding requirements specified in sections 4 and 5 of this appendix are not required for use until the compliance date of any amendment of energy conservation standards for these products published after October 12, 2021.

1. Referenced Materials

DOE incorporated by reference HRF-1-2019, Energy and Internal Volume of Consumer Refrigeration Products (“HRF-1-2019”) in its entirety in § 430.3; however, only enumerated provisions of this document are applicable to this appendix. If there is any conflict between HRF-1-2019 and this appendix, follow the language of the test procedure in this appendix, disregarding the conflicting industry standard language.

(a) AHAM HRF-1-2019, (“HRF-1-2019”), Energy and Internal Volume of Consumer Refrigeration Products:

(i) Section 3 - Definitions, as specified in section 3 of this appendix;

(ii) Section 4 - Method for Determining the Refrigerated Volume of Consumer Refrigeration Products, as specified in section 4.1 of this appendix;

(iii) Section 5 - Method for Determining the Energy Consumption of Consumer Refrigeration Products (excluding Table 5-1 and sections 5.5.6.5, 5.8.2.1.2, 5.8.2.1.3, 5.8.2.1.4, 5.8.2.1.5, and 5.8.2.1.6), as specified in section 5 of this appendix; and

(iv) Section 6 - Method for Determining the Adjusted Volume of Consumer Refrigeration Products, as specified in section 4.2 of this appendix.

(b) Reserved.

If there is any conflict between HRF-1 - 2019 and this appendix, follow the language of the test procedure in this appendix, disregarding the conflicting industry standard language.

2. Scope

This appendix provides the test procedure for measuring the annual energy use in kilowatt-hours per year (kWh/yr), the total refrigerated volume in cubic feet (ft 3), and the total adjusted volume in cubic feet (ft 3) of freezers.

3. Definitions

Section 3, Definitions, of HRF-1-2019 applies to this test procedure. In case of conflicting terms between HRF-1-2019 and DOE's definitions in this appendix or in § 430.2, DOE's definitions take priority.

Through-the-door ice/water dispenser means a device incorporated within the cabinet, but outside the boundary of the refrigerated space, that delivers to the user on demand ice and may also deliver water from within the refrigerated space without opening an exterior door. This definition includes dispensers that are capable of dispensing ice and water or ice only.

4. Volume

Determine the refrigerated volume and adjusted volume for freezers in accordance with the following sections of HRF-1-2019, respectively:

4.1. Section 4, Method for Determining the Refrigerated Volume of Consumer Refrigeration Products; and

4.2. Section 6, Method for Determining the Adjusted Volume of Consumer Refrigeration Products.

5. Energy Consumption

Determine the annual energy use (“AEU”) in kilowatt-hours per year (kWh/yr), for freezers in accordance with section 5, Method for Determining the Energy Consumption of Consumer Refrigeration Products, of HRF-1-2019, except as follows.

5.1. Test Setup and Test Conditions

(a) In section 5.3.1 of HRF-1-2019, the top of the unit shall be determined by the refrigerated cabinet height, excluding any accessories or protruding components on the top of the unit.

(b) The ambient temperature and vertical ambient temperature gradient requirements specified in section 5.3.1 of HRF-1-2019 shall be maintained during both the stabilization period and the test period.

(c) The power supply requirements as specified in section 5.5.1 of HRF-1-2019 shall be maintained based on measurement intervals not to exceed one minute.

(d) The ice storage compartment temperature requirement as specified in section 5.5.6.5 in HRF-1-2019 is not required.

(e) For cases in which setup is not clearly defined by this test procedure, manufacturers must submit a petition for a waiver (See section 6 of this appendix).

(f) If the interior arrangements of the unit under test do not conform with those shown in Figure 5-2 of HRF-1-2019, as appropriate, the unit must be tested by relocating the temperature sensors from the locations specified in the figures to avoid interference with hardware or components within the unit, in which case the specific locations used for the temperature sensors shall be noted in the test data records maintained by the manufacturer in accordance with 10 CFR 429.71, and the certification report shall indicate that non-standard sensor locations were used. If any temperature sensor is relocated by any amount from the location prescribed in Figure 5-2 of HRF-1- 2019 in order to maintain a minimum 1-inch air space from adjustable shelves or other components that could be relocated by the consumer, except in cases in which the Figure prescribes a temperature sensor location within 1 inch of a shelf or similar feature, this constitutes a relocation of temperature sensors that must be recorded in the test data and reported in the certification report as described in this paragraph.

5.2. Test Conduct

(a) For the purposes of comparing compartment temperatures with standardized temperatures, as described in section 5.6 of HRF-1-2019, the freezer compartment temperature shall be as specified in section 5.8.1.2.5 of HRF-1-2019.

(b) In place of Table 5-1 in HRF-1-2019, refer to Table 1 of this section.

Table 1 - Temperature Settings for Freezers

First test Second test Energy calculation based on:
Setting Results Setting Results
Mid Below standard reference temperature Warmest Below standard reference temperature Second Test Only.
Above standard reference temperature First and Second Test.
Above standard reference temperature Coldest Below standard reference temperature First and Second Test.
Above standard reference temperature Model may not be certified as compliant with energy conservation standards based on testing of this unit. Confirm that unit meets product definition. If so, see section 6 of this appendix.
5.3. Test Cycle Energy Calculations

Section 5.8.2, Energy Consumption, of HRF-1-2019 applies to this test procedure, except as follows:

(a) For freezers: To demonstrate compliance with the energy conservation standards at 10 CFR 430.32(a) applicable to products manufactured on or after September 15, 2014, IET, expressed in kilowatt-hours per cycle, equals 0.23 for a product with one or more automatic icemakers and otherwise equals 0 (zero).

(b) In place of section 5.8.2.1.2 of HRF-1-2019, use the calculations provided in this section. For units with long-time automatic defrost control using the two-part test period, the test cycle energy shall be calculated as:

Where:
ET = test cycle energy expended in kilowatt-hours per day;
1440 = conversion factor to adjust to a 24-hour average use cycle in minutes per day;
K = dimensionless correction factor of 0.7 for chest freezers and 0.85 for upright freezers.
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;
T1 and T2 = length of time in minutes of the first and second test parts, respectively;
CT = defrost timer run time or compressor run time between defrosts in hours required to go through a complete cycle, rounded to the nearest tenth of an hour;
12 = factor to adjust for a 50-percent run time of the compressor in hours per day.

(c) In place of sections 5.8.2.1.3 and 5.8.2.1.4 of HRF-1-2019, use the calculations provided in this section. For units with variable defrost control, the test cycle energy shall be calculated as set forth in section 5.3(a) of this appendix with the following addition:

CT shall be calculated equivalent to:

Where:
CTL = the least or shortest compressor run time between defrosts used in the variable defrost control algorithm (greater than or equal to 6 but less than or equal to 12 hours), or the shortest compressor run time between defrosts observed for the test (if it is shorter than the shortest run time used in the control algorithm and is greater than 6 hours), or 6 hours (if the shortest observed run time is less than 6 hours), in hours rounded to the nearest tenth of an hour;
CTM = the maximum compressor run time between defrosts in hours rounded to the nearest tenth of an hour (greater than CTL but not more than 96 hours);
For variable defrost models with no values of CTL and CTM in the algorithm, the default values of 6 and 96 shall be used, respectively.
F = ratio of per day energy consumption in excess of the least energy and the maximum difference in per-day energy consumption and is equal to 0.20.
6. Test Procedure Waivers

To the extent that the procedures contained in this appendix do not provide a means for determining the energy consumption of a basic model, a manufacturer must obtain a waiver under § 430.27 to establish an acceptable test procedure for each such basic model. Such instances could, for example, include situations where the test setup for a particular basic model is not clearly defined by the provisions of this appendix. For details regarding the criteria and procedures for obtaining a waiver, please refer to § 430.27.

[86 FR 56824, Oct. 12, 2021]