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Electronic Code of Federal Regulations

e-CFR Data is current as of April 17, 2014

Title 10: Energy
PART 431—ENERGY EFFICIENCY PROGRAM FOR CERTAIN COMMERCIAL AND INDUSTRIAL EQUIPMENT
Subpart C—Commercial Refrigerators, Freezers and Refrigerator-Freezers


§431.64   Uniform test method for the measurement of energy consumption of commercial refrigerators, freezers, and refrigerator-freezers.

(a) Scope. This section provides the test procedures for measuring, pursuant to EPCA, the daily energy consumption in kilowatt hours per day (kWh/day) for a given product category and volume or total display area of commercial refrigerators, freezers, and refrigerator-freezers.

(b) Testing and calculations. Manufacturers shall use this paragraph (b) for the purposes of certifying compliance with the applicable energy conservation standards and for all representations of energy efficiency/energy use. For equipment manufactured prior to January 1, 2016, determine the daily energy consumption of each covered commercial refrigerator, freezer, or refrigerator-freezer by conducting the test procedure set forth in the Air-Conditioning and Refrigeration Institute (ARI) Standard 1200-2006, “Performance Rating of Commercial Refrigerated Display Merchandisers and Storage Cabinets,” section 3, “Definitions,” section 4, “Test Requirements,” and section 7, “Symbols and Subscripts” (incorporated by reference, see §431.63). For each commercial refrigerator, freezer, or refrigerator-freezer with a self-contained condensing unit, also use ARI Standard 1200-2006, section 6, “Rating Requirements for Self-contained Commercial Refrigerated Display Merchandisers and Storage Cabinets.” For each commercial refrigerator, freezer, or refrigerator-freezer with a remote condensing unit, also use ARI Standard 1200-2006, section 5, “Rating Requirements for Remote Commercial Refrigerated Display Merchandisers and Storage Cabinets.” For equipment manufactured on or after January 1, 2016, determine the daily energy consumption of each covered commercial refrigerator, freezer, refrigerator-freezer or ice-cream freezer by conducting the test procedure set forth in the AHRI Standard 1200 (I-P)-2010, section 3, “Definitions,” section 4, “Test Requirements,” and section 7, “Symbols and Subscripts” (incorporated by reference, see §431.63). For each commercial refrigerator, freezer, or refrigerator-freezer with a self-contained condensing unit, also use AHRI Standard 1200 (I-P)-2010, section 6, “Rating Requirements for Self-contained Commercial Refrigerated Display Merchandisers and Storage Cabinets.” For each commercial refrigerator, freezer, or refrigerator-freezer with a remote condensing unit, also use AHRI Standard 1200 (I-P)-2010, section 5, “Rating Requirements for Remote Commercial Refrigerated Display Merchandisers and Storage Cabinets.”

(1) For display cases manufactured after January 1, 2016 and sold with night curtains installed, the night curtain shall be employed for 6 hours; 3 hours after the start of the first defrost period. Upon the completion of the 6-hour period, the night curtain shall be raised until the completion of the 24-hour test period.

(2) For commercial refrigerators, freezers, and refrigerator-freezers manufactured after January 1, 2016 and sold with lighting occupancy sensors, scheduled lighting controls, or lighting occupancy sensors and scheduled lighting controls installed on the unit, the effect on daily energy consumption will be determined by either a physical test or a calculation method and using the variables that are defined as:

CECA is the Alternate Compressor Energy Consumption (kilowatt-hours);

LECsc is the lighting energy consumption of internal case lights with lighting occupancy sensors and controls deployed (kilowatt-hours);

Pli is the rated power of lights when they are fully on (watts);

Pli(off) is the power of lights when they are off (watts);

Pli(dim) is the power of lights when they are dimmed (watts);

TDECo is the total daily energy consumption with lights fully on, as measured by AHRI Standard 1200 (I-P)-2010 (kilowatt-hours);

tdim is the time period which the lights are dimmed due to the use of lighting occupancy sensors or scheduled lighting controls (hours);

tdim,controls is the time case lighting is dimmed due to the use of lighting controls (hours);

tdim,sensors is the time case lighting is dimmed due to the use of lighting occupancy sensors (hours);

tl is the time period when lights would be on without lighting occupancy sensors and/or scheduled lighting controls (24 hours);

toff is the time period which the lights are off due to the use of lighting occupancy sensors and/or scheduled lighting controls (hours);

toff,controls is the time case lighting is off due to the use of scheduled lighting controls (hours);

toff,sensors is the time case lighting is off due to the use of lighting occupancy sensors (hours); and

tsc is the time period when lighting is fully on with lighting occupancy sensors and scheduled lighting controls enabled (hours).

(i) For both a physical test and a calculation method, determine the estimated time off or dimmed, toff or tdim, as the sum of contributions from lighting occupancy sensors and scheduled lighting controls which dim or turn off lighting, respectively, as shown in the following equation:

eCFR graphic er21fe12.001.gif

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The sum of tsc, toff, and tdim should equal 24 hours and the total time period during which the lights are off or dimmed shall not exceed 10.8 hours. For cases with scheduled lighting controls, the time the case lighting is off and/or dimmed due to scheduled lighting controls (toff,controls and/or tdim,controls, as applicable) shall not exceed 8 hours. For cases with lighting occupancy sensors installed, the time the case lighting is off and/or dimmed due to lighting occupancy sensors (toff,sensors and/or tdim,sensors, as applicable) shall not exceed 10.8 hours. For cases with lighting occupancy sensors and scheduled lighting controls installed, the time the case lighting is off and/or dimmed due to lighting occupancy sensors (toff,sensors and/or tdim,sensors, as applicable) shall not exceed 2.8 hours and the time the case lighting is off and/or dimmed due to scheduled lighting controls (toff,controls and/or tdim,controls, as applicable) shall not exceed 8 hours.

(ii) If using a physical test to determine the daily energy consumption of a commercial refrigerator, freezer, or refrigerator-freezer sold with lighting occupancy sensors, scheduled lighting controls, or lighting occupancy sensors and scheduled lighting controls installed on the unit, turn off the lights for a time period equivalent to toff and dim the lights for a time period equal to tdim. If night curtains are also being tested on the case, the period of lights off and/or dimmed shall begin at the same time that the night curtain is being deployed and shall continue consecutively, in that order, for the appropriate number of hours.

(iii) If using a calculation method to determine the daily energy consumption of a commercial refrigerator, freezer, or refrigerator-freezer sold with lighting occupancy sensors, scheduled lighting controls, or lighting occupancy sensors and scheduled lighting controls installed on the unit—

(A) Calculate the LECsc using the following equation:

eCFR graphic er21fe12.002.gif

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(B) Calculate the CECA using the following equation:

eCFR graphic er21fe12.003.gif

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Where EER represents the energy efficiency ratio from Table 1 in AHRI Standard 1200 (I-P)-2010 (incorporated by reference, see §431.63) for remote condensing equipment or the values shown in the following table for self-contained equipment:

EER for Self-Contained Commercial Refrigerated Display Merchandisers and Storage Cabinets

Operating temperature classEER
Btu/W
Medium11
Low7
Ice Cream5

(C) For remote condensing commercial refrigerators, freezers, and refrigerator-freezers with lighting occupancy sensors, scheduled lighting controls, or lighting occupancy sensors and scheduled lighting controls installed, the revised compressor energy consumption (CECR) shall be the CECA added to the compressor energy consumption (CEC) measured in AHRI Standard 1200 (I-P)-2010 (incorporated by reference, see §431.63). The CDEC for the entire case shall be the sum of the CECR and LECsc (as calculated above) and the fan energy consumption (FEC), anti-condensate energy consumption (AEC), defrost energy consumption (DEC), and condensate evaporator pan energy consumption (PEC) (as measured in AHRI Standard 1200 (I-P)-2010).

(D) For self-contained commercial refrigerators, freezers, and refrigerator-freezers with lighting occupancy sensors, scheduled lighting controls, or lighting occupancy sensors and scheduled lighting controls installed, the TDEC for the entire case shall be the sum of total daily energy consumption as measured by the AHRI Standard 1200 (I-P)-2010 (incorporated by reference, see §431.63) test with the lights fully on (TDECo) and CECA, less the decrease in lighting energy use due to lighting occupancy sensors and scheduled lighting controls, as shown in following equation.

eCFR graphic er21fe12.004.gif

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(3) Conduct the testing required in paragraphs (b) introductory text, (b)(1), and (2) of this section, and determine the daily energy consumption, at the applicable integrated average temperature in the following table. The integrated average temperature is determined using the required test method.

CategoryTest procedure prior to January 1, 2016Test procedure on or after January 1, 2016Integrated average temperatures
(i) Refrigerator with Solid Door(s)ARI Standard 1200-2006AHRI Standard 1200
(I-P)-2010
38 °F (±2 °F).
(ii) Refrigerator with Transparent Door(s)ARI Standard 1200-2006AHRI Standard 1200
(I-P)-2010
38 °F (±2 °F).
(iii) Freezer with Solid Door(s)ARI Standard 1200-2006AHRI Standard 1200
(I-P)-2010
0 °F (±2 °F).
(iv) Freezer with Transparent Door(s)ARI Standard 1200-2006AHRI Standard 1200
(I-P)-2010
0 °F (±2 °F).
(v) Refrigerator-Freezer with Solid Door(s)ARI Standard 1200-2006AHRI Standard 1200
(I-P)-2010
38 °F (±2 °F) for refrigerator compartment.
0 °F (±2 °F) for freezer compartment.
(vi) Commercial Refrigerator with a Self-Contained Condensing Unit Designed for Pull-Down Temperature Applications and Transparent DoorsARI Standard 1200-2006AHRI Standard 1200
(I-P)-2010
38 °F (±2 °F).
(vii) Ice-Cream FreezerARI Standard 1200-2006AHRI Standard 1200
(I-P)-2010
−15.0 °F (±2 °F).
(viii) Commercial Refrigerator, Freezer, and Refrigerator-Freezer with a Self-Contained Condensing Unit and without DoorsARI Standard 1200-2006AHRI Standard 1200
(I-P)-2010
(A) 0 °F (±2 °F) for low temperature applications.
(B) 38.0 °F (±2 °F) for medium temperature applications.
(ix) Commercial Refrigerator, Freezer, and Refrigerator-Freezer with a Remote Condensing UnitARI Standard 1200-2006AHRI Standard 1200
(I-P)-2010
(A) 0 °F (±2 °F) for low temperature applications.
(B) 38.0 °F (±2 °F) for medium temperature applications.

(A) If a piece of commercial refrigeration equipment is not able to be tested at the specified integrated average temperatures of 38 °F (±2 °F), 0 °F (±2 °F), or −15 °F (±2 °F) for refrigerators, freezers, and ice-cream freezers, respectively, the unit may be tested at the lowest application product temperature, as defined in §431.62. For many pieces of equipment, this will be the lowest thermostat setting. For remote condensing equipment without a thermostat or other means of controlling temperature at the case, the lowest application product temperature shall be that achieved with the adjusted dew point temperature (as defined in AHRI 1200 (I-P)-2010) set to 5 degrees colder than that required to maintain the manufacturer's lowest specified application temperature.

(B) For commercial refrigeration equipment that is also tested in accordance with NSF test procedures (Type I and Type II), integrated average temperatures and ambient conditions used for NSF testing may be used in place of DOE prescribed integrated average temperatures and ambient conditions provided they result in a more stringent test. That is, the measured daily energy consumption of the same unit, when tested at the rating temperatures and/or ambient conditions specified in the DOE test procedure, will be lower than or equal to the measured daily energy consumption of the unit when tested with the rating temperatures or ambient conditions used for NSF testing. The integrated average temperature measured during the test may be lower than the range specified by the DOE rating temperature specifications, provided in paragraph (b)(3) of this section, but may not exceed the upper value of the specified range. Ambient temperatures and/or humidity values may be higher than those specified in the DOE test procedure.

(4) For equipment manufactured prior to January 1, 2016, determine the volume of each covered commercial refrigerator, freezer, or refrigerator-freezer using the methodology set forth in the ANSI/AHAM HRF-1-2004, “Energy, Performance and Capacity of Household Refrigerators, Refrigerator-Freezers and Freezers” (incorporated by reference, see §431.63), section 3.21, “Volume,” sections 4.1 through 4.3, “Method for Computing Total Refrigerated Volume and Total Shelf Area of Household Refrigerators and Household Wine Chillers,” and sections 5.1 through 5.3, “Method for Computing Total Refrigerated Volume and Total Shelf Area of Household Freezers.” For equipment manufactured on or after January 1, 2016, determine the volume of any covered commercial refrigerator, freezer, refrigerator-freezer, or ice-cream freezer using the method set forth in the HRF-1-2008 (incorporated by reference, see §431.63), section 3.30, “Volume,” and sections 4.1 through 4.3, “Method for Computing Refrigerated Volume of Refrigerators, Refrigerator-Freezers, Wine Chillers and Freezers.”

[70 FR 60414, Oct. 18, 2005, as amended at 77 FR 10318, Feb. 21, 2012]



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