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Electronic Code of Federal Regulations

e-CFR data is current as of November 7, 2019

Title 10Chapter IISubchapter DPart 431 → Subpart C


Title 10: Energy
PART 431—ENERGY EFFICIENCY PROGRAM FOR CERTAIN COMMERCIAL AND INDUSTRIAL EQUIPMENT


Subpart C—Commercial Refrigerators, Freezers and Refrigerator-Freezers


Contents
§431.61   Purpose and scope.
§431.62   Definitions concerning commercial refrigerators, freezers and refrigerator-freezers.

Test Procedures

§431.63   Materials incorporated by reference.
§431.64   Uniform test method for the measurement of energy consumption of commercial refrigerators, freezers, and refrigerator-freezers.

Energy Conservation Standards

§431.66   Energy conservation standards and their effective dates.
Appendix A to Subpart C of Part 431—Uniform Test Method for the Measurement of Energy Consumption of Commercial Refrigerators, Freezers, and Refrigerator-Freezers
Appendix B to Subpart C of Part 431—Amended Uniform Test Method for the Measurement of Energy Consumption of Commercial Refrigerators, Freezers, and Refrigerator-Freezers

Source: 70 FR 60414, Oct. 18, 2005, unless otherwise noted.

§431.61   Purpose and scope.

This subpart contains energy conservation requirements for commercial refrigerators, freezers and refrigerator-freezers, pursuant to Part C of Title III of the Energy Policy and Conservation Act, as amended, 42 U.S.C. 6311-6317.

§431.62   Definitions concerning commercial refrigerators, freezers and refrigerator-freezers.

Air-curtain angle means:

(1) For equipment without doors and without a discharge air grille or discharge air honeycomb, the angle between a vertical line extended down from the highest point on the manufacturer's recommended load limit line and the load limit line itself, when the equipment is viewed in cross-section; and

(2) For all other equipment without doors, the angle formed between a vertical line and the straight line drawn by connecting the point at the inside edge of the discharge air opening with the point at the inside edge of the return air opening, when the equipment is viewed in cross-section.

Basic model means all commercial refrigeration equipment manufactured by one manufacturer within a single equipment class, having the same primary energy source, and that have essentially identical electrical, physical, and functional characteristics that affect energy consumption.

Chef base or griddle stand means commercial refrigeration equipment that is designed and marketed for the express purpose of having a griddle or other cooking appliance placed on top of it that is capable of reaching temperatures hot enough to cook food.

Closed solid means equipment with doors, and in which more than 75 percent of the outer surface area of all doors on a unit are not transparent.

Closed transparent means equipment with doors, and in which 25 percent or more of the outer surface area of all doors on the unit are transparent.

Commercial freezer means a unit of commercial refrigeration equipment in which all refrigerated compartments in the unit are capable of operating below 32 °F (±2 °F).

Commercial hybrid means a unit of commercial refrigeration equipment:

(1) That consists of two or more thermally separated refrigerated compartments that are in two or more different equipment families, and

(2) That is sold as a single unit.

Commercial refrigerator means a unit of commercial refrigeration equipment in which all refrigerated compartments in the unit are capable of operating at or above 32 °F (±2 °F).

Commercial refrigerator-freezer means a unit of commercial refrigeration equipment consisting of two or more refrigerated compartments where at least one refrigerated compartment is capable of operating at or above 32 °F (±2 °F) and at least one refrigerated compartment is capable of operating below 32 °F (±2 °F).

Commercial refrigerator, freezer, and refrigerator-freezer means refrigeration equipment that—

(1) Is not a consumer product (as defined in §430.2 of part 430);

(2) Is not designed and marketed exclusively for medical, scientific, or research purposes;

(3) Operates at a chilled, frozen, combination chilled and frozen, or variable temperature;

(4) Displays or stores merchandise and other perishable materials horizontally, semi-vertically, or vertically;

(5) Has transparent or solid doors, sliding or hinged doors, a combination of hinged, sliding, transparent, or solid doors, or no doors;

(6) Is designed for pull-down temperature applications or holding temperature applications; and

(7) Is connected to a self-contained condensing unit or to a remote condensing unit.

Door means a movable panel that separates the interior volume of a unit of commercial refrigeration equipment from the ambient environment and is designed to facilitate access to the refrigerated space for the purpose of loading and unloading product. This includes hinged doors, sliding doors, and drawers. This does not include night curtains.

Door angle means:

(1) For equipment with flat doors, the angle between a vertical line and the line formed by the plane of the door, when the equipment is viewed in cross-section; and

(2) For equipment with curved doors, the angle formed between a vertical line and the straight line drawn by connecting the top and bottom points where the display area glass joins the cabinet, when the equipment is viewed in cross-section.

Holding temperature application means a use of commercial refrigeration equipment other than a pull-down temperature application, except a blast chiller or freezer.

Horizontal Closed means equipment with hinged or sliding doors and a door angle greater than or equal to 45°.

Horizontal Open means equipment without doors and an air-curtain angle greater than or equal to 80° from the vertical.

Ice-cream freezer means a commercial freezer that is designed to operate at or below −5 °F (±2 °F) (−21 °C ±1.1 °C) and that the manufacturer designs, markets, or intends for the storing, displaying, or dispensing of ice cream.

Integrated average temperature means the average temperature of all test package measurements taken during the test.

Lighting occupancy sensor means a device which uses passive infrared, ultrasonic, or other motion-sensing technology to automatically turn off or dim lights within the equipment when no motion is detected in the sensor's coverage area for a certain preset period of time.

Lowest application product temperature means the lowest integrated average temperature at which a given basic model is capable of consistently operating (i.e., maintaining so as to comply with the steady-state stabilization requirements specified in ASHRAE 72-2005 (incorporated by reference, see §431.63) for the purposes of testing under the DOE test procedure).

Night curtain means a device which is temporarily deployed to decrease air exchange and heat transfer between the refrigerated case and the surrounding environment.

Operating temperature means the range of integrated average temperatures at which a self-contained commercial refrigeration unit or remote-condensing commercial refrigeration unit with a thermostat is capable of operating or, in the case of a remote-condensing commercial refrigeration unit without a thermostat, the range of integrated average temperatures at which the unit is marketed, designed, or intended to operate.

Pull-down temperature application means a commercial refrigerator with doors that, when fully loaded with 12 ounce beverage cans at 90 degrees F, can cool those beverages to an average stable temperature of 38 degrees F in 12 hours or less.

Rating temperature means the integrated average temperature a unit must maintain during testing (i.e., either as listed in the table at §431.66(d)(1) or the lowest application product temperature).

Remote condensing unit means a factory-made assembly of refrigerating components designed to compress and liquefy a specific refrigerant that is remotely located from the refrigerated equipment and consists of 1 or more refrigerant compressors, refrigerant condensers, condenser fans and motors, and factory supplied accessories.

Scheduled lighting control means a device which automatically shuts off or dims the lighting in a display case at scheduled times throughout the day.

Self-contained condensing unit means a factory-made assembly of refrigerating components designed to compress and liquefy a specific refrigerant that is an integral part of the refrigerated equipment and consists of 1 or more refrigerant compressors, refrigerant condensers, condenser fans and motors, and factory supplied accessories.

Semivertical Open means equipment without doors and an air-curtain angle greater than or equal to 10° and less than 80° from the vertical.

Service over counter means equipment that has sliding or hinged doors in the back intended for use by sales personnel, with glass or other transparent material in the front for displaying merchandise, and that has a height not greater than 66 inches and is intended to serve as a counter for transactions between sales personnel and customers. “Service over the counter, self-contained, medium temperature commercial refrigerator”, also defined in this section, is one specific equipment class within the service over counter equipment family.

Service over the counter, self-contained, medium temperature commercial refrigerator or SOC-SC-M means a commercial refrigerator—

(1) That operates at temperatures at or above 32 °F;

(2) With a self-contained condensing unit;

(3) Equipped with sliding or hinged doors in the back intended for use by sales personnel, and with glass or other transparent material in the front for displaying merchandise; and

(4) That has a height not greater than 66 inches and is intended to serve as a counter for transactions between sales personnel and customers.

Test package means a packaged material that is used as a standard product temperature-measuring device.

Transparent means greater than or equal to 45 percent light transmittance, as determined in accordance with the ASTM Standard E 1084-86 (Reapproved 2009), (incorporated by reference, see §431.63) at normal incidence and in the intended direction of viewing.

Vertical Closed means equipment with hinged or sliding doors and a door angle less than 45°.

Vertical Open means equipment without doors and an air-curtain angle greater than or equal to 0° and less than 10° from the vertical.

Wedge case means a commercial refrigerator, freezer, or refrigerator-freezer that forms the transition between two regularly shaped display cases.

[70 FR 60414, Oct. 18, 2005, as amended at 71 FR 71369, Dec. 8, 2006; 74 FR 1139, Jan. 9, 2009; 76 FR 12503, Mar. 7, 2011; 77 FR 10318, Feb. 21, 2012; 78 FR 62993, Oct. 23, 2013; 78 FR 79598, Dec. 31, 2013; 79 FR 22307, Apr. 21, 2014; 79 FR 17816, Mar. 28, 2014]

Test Procedures

§431.63   Materials incorporated by reference.

(a) General. We incorporate by reference the following standards into subpart C of part 431. The material listed has been approved for incorporation by reference by the Director of the Federal Register in accordance with 5 U.S.C. 552(a) and 1 CFR 51. Any subsequent amendment to a standard by the standard-setting organization will not affect the DOE regulations unless and until amended by DOE. Material is incorporated as it exists on the date of the approval and a notice of any change in the material will be published in the Federal Register. All approved material is available for inspection at the National Archives and Records Administration (NARA). For information on the availability of this material at NARA, call 202-741-6030 or go to http://www.archives.gov/federal__register/code__of__federal__regulations/ibr__locations.html. Also, this material is available for inspection at U.S. Department of Energy, Office of Energy Efficiency and Renewable Energy, Building Technologies Program, 6th Floor, 950 L'Enfant Plaza, SW., Washington, DC 20024, 202-586-2945, or go to: http://www1.eere.energy.gov/buildings/appliance__standards/. Standards can be obtained from the sources listed below.

(b) ANSI. American National Standards Institute, 25 W. 43rd Street, 4th Floor, New York, NY 10036, 212-642-4900, or go to http://www.ansi.org:

(1) ANSI /AHAM HRF-1-2004, Energy, Performance and Capacity of Household Refrigerators, Refrigerator-Freezers and Freezers, approved July 7, 2004, IBR approved for §431.64 and appendices A and B to subpart C to part 431.

(2) AHAM HRF-1-2008 (“HRF-1-2008”), Association of Home Appliance Manufacturers, Energy and Internal Volume of Refrigerating Appliances (2008) including Errata to Energy and Internal Volume of Refrigerating Appliances, Correction Sheet issued November 17, 2009, IBR approved for §431.64 and appendices A and B to subpart C to part 431.

(c) AHRI. Air-Conditioning, Heating, and Refrigeration Institute, 2111 Wilson Blvd., Suite 500, Arlington, VA 22201, (703) 524-8800, ahri@ahrinet.org, or http://www.ahrinet.org/Content/StandardsProgram__20.aspx.

(1) ARI Standard 1200-2006, Performance Rating of Commercial Refrigerated Display Merchandisers and Storage Cabinets, 2006, IBR approved for §§431.64 and 431.66, and appendices A and B to subpart C of part 431.

(2) AHRI Standard 1200 (I-P)-2010 (“AHRI Standard 1200 (I-P)-2010”), 2010 Standard for Performance Rating of Commercial Refrigerated Display Merchandisers and Storage Cabinets, 2010, IBR approved for §§431.64 and 431.66, and appendices A and B to subpart C of part 431.

(d) ASHRAE. The American Society of Heating, Refrigerating, and Air-Conditioning Engineers, Inc., 1971 Tullie Circle NE., Atlanta, GA 30329, or http://www.ashrae.org/.

(1) ANSI/ASHRAE Standard 72-2005, (ASHRAE 72-2005), “Method of Testing Commercial Refrigerators and Freezers,” Copyright 2005, IBR approved for §431.62, and appendices A and B to subpart C of part 431.

(2) [Reserved]

(e) ASTM. ASTM International, 100 Barr Harbor Drive, P.O. Box C700, West Conshohocken, PA 19428, (877) 909-2786, or go to http://www.astm.org/.

(1) ASTM E 1084 (Reapproved 2009), “Standard Test Method for Solar Transmittance (Terrestrial) of Sheet Materials Using Sunlight,” approved April 1, 2009, IBR approved for §431.62.

(2) [Reserved]

[74 FR 1139, Jan. 9, 2009, as amended at 77 FR 10318, Feb. 21, 2012; 78 FR 62993, Oct. 23, 2013; 79 FR 22308, Apr. 21, 2014]

§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. Determine the daily energy consumption of each covered commercial refrigerator, freezer, or refrigerator-freezer by conducting the appropriate test procedure set forth below, in appendix A or B to this subpart. The daily energy consumption of commercial refrigeration equipment shall be calculated using raw measured values and the final test results shall be reported in increments of 0.01 kWh/day.

[70 FR 60414, Oct. 18, 2005, as amended at 77 FR 10318, Feb. 21, 2012; 79 FR 22308, Apr. 21, 2014]

Energy Conservation Standards

§431.66   Energy conservation standards and their effective dates.

(a) In this section—

(1) The term “AV” means the adjusted volume (ft3) (defined as 1.63 × frozen temperature compartment volume (ft3) + chilled temperature compartment volume (ft3)) with compartment volumes measured in accordance with the Association of Home Appliance Manufacturers Standard HRF1-1979.

(2) The term “V” means the chilled or frozen compartment volume (ft3) (as defined in the Association of Home Appliance Manufacturers Standard HRF1-1979).

(3) For the purpose of paragraph (d) of this section, the term “TDA” means the total display area (ft2) of the case, as defined in ARI Standard 1200-2006, appendix D (incorporated by reference, see §431.63). For the purpose of paragraph (e) of this section, the term “TDA” means the total display area (ft2) of the case, as defined in AHRI Standard 1200 (I-P)-2010, appendix D (incorporated by reference, see §431.63).

(b)(1) Each commercial refrigerator, freezer, and refrigerator-freezer with a self-contained condensing unit designed for holding temperature applications manufactured on or after January 1, 2010 and before March 27, 2017 shall have a daily energy consumption (in kilowatt-hours per day) that does not exceed the following:

Category Maximum daily energy consumption
(kilowatt hours per day)
Refrigerators with solid doors0.10V + 2.04.
Refrigerators with transparent doors0.12V + 3.34.
Freezers with solid doors0.40V + 1.38.
Freezers with transparent doors0.75V + 4.10.
Refrigerator/freezers with solid doorsthe greater of 0.27AV-0.71 or 0.70.

(2) Each service over the counter, self-contained, medium temperature commercial refrigerator (SOC-SC-M) manufactured on or after January 1, 2012, shall have a total daily energy consumption (in kilowatt hours per day) of not more than 0.6 × TDA + 1.0. As used in the preceding sentence, “TDA” means the total display area (ft2) of the case, as defined in the AHRI Standard 1200 (I-P)-2010, appendix D (incorporated by reference, see §431.63).

(c) Each commercial refrigerator with a self-contained condensing unit designed for pull-down temperature applications and transparent doors manufactured on or after January 1, 2010 and before March 27, 2017 shall have a daily energy consumption (in kilowatt-hours per day) of not more than 0.126V + 3.51.

(d) Each commercial refrigerator, freezer, and refrigerator-freezer with a self-contained condensing unit and without doors; commercial refrigerator, freezer, and refrigerator-freezer with a remote condensing unit; and commercial ice-cream freezer manufactured on or after January 1, 2012 and before March 27, 2017 shall have a daily energy consumption (in kilowatt-hours per day) that does not exceed the levels specified:

(1) For equipment other than hybrid equipment, refrigerator-freezers or wedge cases:

Equipment categoryCondensing unit
configuration
Equipment
family
Rating
temp.
(°F)
Operating
temp.
(°F)
Equipment class
designation*
Maximum daily energy consumption
(kWh/day)
Remote Condensing Commercial Refrigerators and Commercial FreezersRemote (RC)Vertical Open (VOP)38 (M)
0 (L)
≥32±2
<32±2
VOP.RC.M
VOP.RC.L
0.82 × TDA + 4.07
2.27 × TDA + 6.85
   Semivertical Open (SVO)38 (M)
0 (L)
≥32±2
<32±2
SVO.RC.M
SVO.RC.L
0.83 × TDA + 3.18
2.27 × TDA + 6.85
   Horizontal Open (HZO)38 (M)
0 (L)
≥32±2
<32±2
HZO.RC.M
HZO.RC.L
0.35 × TDA + 2.88
0.57 × TDA + 6.88
   Vertical Closed Transparent (VCT)38 (M)
0 (L)
≥32±2
<32±2
VCT.RC.M
VCT.RC.L
0.22 × TDA + 1.95
0.56 × TDA + 2.61
   Horizontal Closed Transparent (HCT)38 (M)
0 (L)
≥32±2
<32±2
HCT.RC.M
HCT.RC.L
0.16 × TDA + 0.13
0.34 × TDA + 0.26
   Vertical Closed Solid (VCS)38 (M)
0 (L)
≥32±2
<32±2
VCS.RC.M
VCS.RC.L
0.11 × V + 0.26
0.23 × V + 0.54
   Horizontal Closed Solid (HCS)38 (M)
0 (L)
≥32±2
<32±2
HCS.RC.M
HCS.RC.L
0.11 × V + 0.26
0.23 × V + 0.54
   Service Over Counter (SOC)38 (M)
0 (L)
≥32±2
<32±2
SOC.RC.M
SOC.RC.L
0.51 × TDA + 0.11
1.08 × TDA + 0.22
Self-Contained Commercial Refrigerators and Commercial Freezers without DoorsSelf-Contained (SC)Vertical Open (VOP)38 (M)
0 (L)
≥32±2
<32±2
VOP.SC.M
VOP.SC.L
1.74 × TDA + 4.71
4.37 × TDA + 11.82
   Semivertical Open (SVO)38 (M)
0 (L)
≥32±2
<32±2
SVO.SC.M
SVO.SC.L
1.73 × TDA + 4.59
4.34 × TDA + 11.51
   Horizontal Open38 (M)
0 (L)
≥32±2
<32±2
HZO.SC.M
HZO.SC.L
0.77 × TDA + 5.55
1.92 × TDA + 7.08
Commercial Ice-Cream FreezersRemote (RC)Vertical Open (VOP)−15 (I)≤−5±2****VOP.RC.I2.89 × TDA + 8.7
   Semivertical Open (SVO)      SVO.RC.I2.89 × TDA + 8.7
   Horizontal Open (HZO)      HZO.RC.I0.72 × TDA + 8.74
   Vertical Closed Transparent (VCT)      VCT.RC.I0.66 × TDA + 3.05
   Horizontal Closed Transparent (HCT)      HCT.RC.I0.4 × TDA + 0.31
   Vertical Closed Solid (VCS)      VCS.RC.I0.27 × V + 0.63
   Horizontal Closed Solid (HCS)      HCS.RC.I0.27 × V + 0.63
   Service Over Counter (SVO)      SOC.RC.I1.26 × TDA + 0.26
   Self-Contained (SC)Vertical Open (VOP)      VOP.SC.I5.55 × TDA + 15.02
   Semivertical Open (SVO)      SVO.SC.I5.52 × TDA + 14.63
   Horizontal Open (HZO)      HZO.SC.I2.44 × TDA + 9
   Vertical Closed Transparent (VCT)      VCT.SC.I0.67 × TDA + 3.29
   Horizontal Closed Transparent (HCT)      HCT.SC.I0.56 × TDA + 0.43
   Vertical Closed Solid (VCS)      VCS.SC.I0.38 × V + 0.88
   Horizontal Closed Solid (HCS)      HCS.SC.I0.38 × V + 0.88
   Service Over Counter (SVO)      SOC.SC.I1.76 × TDA + 0.36

*The meaning of the letters in this column is indicated in the three columns to the left.

**Ice-cream freezer is defined in 10 CFR 431.62 as a commercial freezer that is designed to operate at or below −5 °F (−21 °C) and that the manufacturer designs, markets, or intends for the storing, displaying, or dispensing of ice cream.

(2) For commercial refrigeration equipment with two or more compartments (i.e., hybrid refrigerators, hybrid freezers, hybrid refrigerator-freezers, and non-hybrid refrigerator-freezers), the maximum daily energy consumption (MDEC) for each model shall be the sum of the MDEC values for all of its compartments. For each compartment, measure the TDA or volume of that compartment, and determine the appropriate equipment class based on that compartment's equipment family, condensing unit configuration, and designed operating temperature. The MDEC limit for each compartment shall be the calculated value obtained by entering that compartment's TDA or volume into the standard equation in paragraph (d)(1) of this section for that compartment's equipment class. Measure the calculated daily energy consumption (CDEC) or total daily energy consumption (TDEC) for the entire case:

(i) For remote condensing commercial hybrid refrigerators, hybrid freezers, hybrid refrigerator-freezers, and non-hybrid refrigerator-freezers, where two or more independent condensing units each separately cool only one compartment, measure the total refrigeration load of each compartment separately according to the ARI Standard 1200-2006 test procedure (incorporated by reference, see §431.63). Calculate compressor energy consumption (CEC) for each compartment using Table 1 in ARI Standard 1200-2006 using the saturated evaporator temperature for that compartment. The CDEC for the entire case shall be the sum of the CEC for each compartment, fan energy consumption (FEC), lighting energy consumption (LEC), anti-condensate energy consumption (AEC), defrost energy consumption (DEC), and condensate evaporator pan energy consumption (PEC) (as measured in ARI Standard 1200-2006).

(ii) For remote condensing commercial hybrid refrigerators, hybrid freezers, hybrid refrigerator-freezers, and non-hybrid refrigerator-freezers, where two or more compartments are cooled collectively by one condensing unit, measure the total refrigeration load of the entire case according to the ARI Standard 1200-2006 test procedure (incorporated by reference, see §431.63). Calculate a weighted saturated evaporator temperature for the entire case by:

(A) Multiplying the saturated evaporator temperature of each compartment by the volume of that compartment (as measured in ARI Standard 1200-2006),

(B) Summing the resulting values for all compartments, and

(C) Dividing the resulting total by the total volume of all compartments.

Calculate the CEC for the entire case using Table 1 in ARI Standard 1200-2006 (incorporated by reference, see §431.63), using the total refrigeration load and the weighted average saturated evaporator temperature. The CDEC for the entire case shall be the sum of the CEC, FEC, LEC, AEC, DEC, and PEC.

(iii) For self-contained commercial hybrid refrigerators, hybrid freezers, hybrid refrigerator-freezers, and non-hybrid refrigerator-freezers, measure the TDEC for the entire case according to the ARI Standard 1200-2006 test procedure (incorporated by reference, see §431.63).

(3) For remote-condensing and self-contained wedge cases, measure the CDEC or TDEC according to the ARI Standard 1200-2006 test procedure (incorporated by reference, see §431.63). The MDEC for each model shall be the amount derived by incorporating into the standards equation in paragraph (d)(1) of this section for the appropriate equipment class a value for the TDA that is the product of:

(i) The vertical height of the air-curtain (or glass in a transparent door) and (ii) The largest overall width of the case, when viewed from the front.

(e) Each commercial refrigerator, freezer, and refrigerator-freezer with a self-contained condensing unit designed for holding temperature applications and with solid or transparent doors; commercial refrigerator with a self-contained condensing unit designed for pull-down temperature applications and with transparent doors; commercial refrigerator, freezer, and refrigerator-freezer with a self-contained condensing unit and without doors; commercial refrigerator, freezer, and refrigerator-freezer with a remote condensing unit; and commercial ice-cream freezer manufactured on or after March 27, 2017, shall have a daily energy consumption (in kilowatt-hours per day) that does not exceed the levels specified:

(1) For equipment other than hybrid equipment, refrigerator/freezers, or wedge cases:

Equipment categoryCondensing
unit
configuration
Equipment
family
Rating
temp.
°F
Operating
temp.
°F
Equipment
class
designation*
Maximum
daily energy
consumption
kWh/day
Remote Condensing Commercial Refrigerators and Commercial FreezersRemote (RC)Vertical Open (VOP)38 (M)≥32VOP.RC.M0.64 × TDA + 4.07.
         0 (L)<32VOP.RC.L2.2 × TDA + 6.85.
   Semivertical Open (SVO)38 (M)≥32SVO.RC.M0.66 × TDA + 3.18.
         0 (L)<32SVO.RC.L2.2 × TDA + 6.85.
      Horizontal Open (HZO)38 (M)≥32HZO.RC.M0.35 × TDA + 2.88.
         0 (L)<32HZO.RC.L0.55 × TDA + 6.88.
      Vertical Closed Transparent (VCT)38 (M)≥32VCT.RC.M0.15 × TDA + 1.95.
         0 (L)<32VCT.RC.L0.49 × TDA + 2.61.
      Horizontal Closed Transparent (HCT)38 (M)≥32HCT.RC.M0.16 × TDA + 0.13.
         0 (L)<32HCT.RC.L0.34 × TDA + 0.26.
      Vertical Closed Solid (VCS)38 (M)≥32VCS.RC.M0.1 × V + 0.26.
         0 (L)<32VCS.RC.L0.21 × V + 0.54.
      Horizontal Closed Solid (HCS)38 (M)≥32HCS.RC.M0.1 × V + 0.26.
         0 (L)<32HCS.RC.L0.21 × V + 0.54.
      Service Over Counter (SOC)38 (M)≥32SOC.RC.M0.44 × TDA + 0.11.
         0 (L)<32SOC.RC.L0.93 × TDA + 0.22.
Self-Contained Commercial Refrigerators and Commercial Freezers Without DoorsSelf-Contained (SC)Vertical Open (VOP)38 (M)≥32VOP.SC.M1.69 × TDA + 4.71.
         0 (L)<32VOP.SC.L4.25 × TDA + 11.82.
      Semivertical Open (SVO)38 (M)≥32SVO.SC.M1.7 × TDA + 4.59.
         0 (L)<32SVO.SC.L4.26 × TDA + 11.51.
      Horizontal Open (HZO)38 (M)≥32HZO.SC.M0.72 × TDA + 5.55.
         0 (L)<32HZO.SC.L1.9 × TDA + 7.08.
Self-Contained Commercial Refrigerators and Commercial Freezers With DoorsSelf-Contained (SC)Vertical Closed Transparent (VCT)38 (M)≥32VCT.SC.M0.1 × V + 0.86.
         0 (L)<32VCT.SC.L0.29 × V + 2.95.
      Vertical Closed Solid (VCS)38 (M)≥32VCS.SC.M0.05 × V + 1.36.
            <32VCS.SC.L0.22 × V + 1.38.
      Horizontal Closed Transparent (HCT)38 (M)≥32HCT.SC.M0.06 × V + 0.37.
         0 (L)<32HCT.SC.L0.08 × V + 1.23.
      Horizontal Closed Solid (HCS)   ≥32HCS.SC.M0.05 × V + 0.91.
         0 (L)<32HCS.SC.L0.06 × V + 1.12.
      Service Over Counter (SOC)   ≥32SOC.SC.M0.52 × TDA + 1.
         0 (L)<32SOC.SC.L1.1 × TDA + 2.1.
Self-Contained Commercial Refrigerators with Transparent Doors for Pull-Down Temperature ApplicationsSelf-Contained (SC)Pull-Down (PD)38 (M)≥32PD.SC.M0.11 × V + 0.81.
Commercial Ice-Cream FreezersRemote (RC)Vertical Open (VOP)−15 (I)≤−5**VOP.RC.I2.79 × TDA + 8.7.
      Semivertical Open (SVO)      SVO.RC.I2.79 × TDA + 8.7.
      Horizontal Open (HZO)      HZO.RC.I0.7 × TDA + 8.74.
      Vertical Closed Transparent (VCT)      VCT.RC.I0.58 × TDA + 3.05.
      Horizontal Closed Transparent (HCT)      HCT.RC.I0.4 × TDA + 0.31.
      Vertical Closed Solid (VCS)      VCS.RC.I0.25 × V + 0.63.
      Horizontal Closed Solid (HCS)      HCS.RC.I0.25 × V + 0.63.
      Service Over Counter (SOC)      SOC.RC.I1.09 × TDA + 0.26.
   Self-Contained (SC)Vertical Open (VOP)      VOP.SC.I5.4 × TDA + 15.02.
      Semivertical Open (SVO)      SVO.SC.I5.41 × TDA + 14.63.
      Horizontal Open (HZO)      HZO.SC.I2.42 × TDA + 9.
      Vertical Closed Transparent (VCT)      VCT.SC.I0.62 × TDA + 3.29.
      Horizontal Closed Transparent (HCT)      HCT.SC.I0.56 × TDA + 0.43.
      Vertical Closed Solid (VCS)      VCS.SC.I0.34 × V + 0.88.
      Horizontal Closed Solid (HCS)      HCS.SC.I0.34 × V + 0.88.
      Service Over Counter (SOC)      SOC.SC.I1.53 × TDA + 0.36.

*The meaning of the letters in this column is indicated in the columns to the left.

**Ice-cream freezer is defined in 10 CFR 431.62 as a commercial freezer that is designed to operate at or below −5 °F *(−21 °C) and that the manufacturer designs, markets, or intends for the storing, displaying, or dispensing of ice cream.

(2) For commercial refrigeration equipment with two or more compartments (i.e., hybrid refrigerators, hybrid freezers, hybrid refrigerator-freezers, and non-hybrid refrigerator-freezers), the maximum daily energy consumption for each model shall be the sum of the MDEC values for all of its compartments. For each compartment, measure the TDA or volume of that compartment, and determine the appropriate equipment class based on that compartment's equipment family, condensing unit configuration, and designed operating temperature. The MDEC limit for each compartment shall be the calculated value obtained by entering that compartment's TDA or volume into the standard equation in paragraph (e)(1) of this section for that compartment's equipment class. Measure the CDEC or TDEC for the entire case as described in §431.66(d)(2)(i) through (iii), except that where measurements and calculations reference ARI Standard 1200-2006 (incorporated by reference, see §431.63), AHRI Standard 1200 (I-P)-2010 (incorporated by reference, see §431.63) shall be used.

(3) For remote condensing and self-contained wedge cases, measure the CDEC or TDEC according to the AHRI Standard 1200 (I-P)-2010 test procedure (incorporated by reference, see §431.63). For wedge cases in equipment classes for which a volume metric is used, the MDEC shall be the amount derived from the appropriate standards equation in paragraph (e)(1) of this section. For wedge cases of equipment classes for which a TDA metric is used, the MDEC for each model shall be the amount derived by incorporating into the standards equation in paragraph (e)(1) of this section for the equipment class a value for the TDA that is the product of:

(i) The vertical height of the air curtain (or glass in a transparent door) and

(ii) The largest overall width of the case, when viewed from the front.

(f) Exclusions. The energy conservation standards in paragraphs (b) through (e) of this section do not apply to salad bars, buffet tables, and chef bases or griddle stands.

[70 FR 60414, Oct. 18, 2005, as amended at 74 FR 1140, Jan. 9, 2009; 78 FR 62993, Oct. 23, 2013; 79 FR 22308, Apr. 21, 2014; 79 FR 17816, Mar. 28, 2014]

Appendix A to Subpart C of Part 431—Uniform Test Method for the Measurement of Energy Consumption of Commercial Refrigerators, Freezers, and Refrigerator-Freezers

Note: After October 20, 2014 but before March 28, 2017, any representations made with respect to the energy use or efficiency of commercial refrigeration equipment must be made in accordance with the results of testing pursuant to this appendix.

Manufacturers conducting tests of commercial refrigeration equipment after May 21, 2014 and prior to October 20, 2014, must conduct such test in accordance with either this appendix or §431.64 as it appeared at 10 CFR part 430, subpart B, in the 10 CFR parts 200 to 499 edition revised as of January 1, 2014. Any representations made with respect to the energy use or efficiency of such commercial refrigeration equipment must be in accordance with whichever version is selected. Given that after October 20, 2014 representations with respect to the energy use or efficiency of commercial refrigeration equipment must be made in accordance with tests conducted pursuant to this appendix, manufacturers may wish to begin using this test procedure as soon as possible.

1. Test Procedure

1.1. Determination of Daily Energy Consumption. 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 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.”

1.2. Methodology for Determining Applicability of Transparent Door Equipment Families. To determine if a door for a given model of commercial refrigeration equipment is transparent: (1) Calculate the outer door surface area including frames and mullions; (2) calculate the transparent surface area within the outer door surface area excluding frames and mullions; (3) calculate the ratio of (2) to (1) for each of the outer doors; and (4) the ratio for the transparent surface area of all outer doors must be greater than 0.25 to qualify as a transparent equipment family.

1.3. Additional Specifications for Testing of Components and Accessories. Subject to the provisions regarding specific components and accessories listed below, all standard components that would be used during normal operation of the basic model in the field shall be installed and in operation during testing as recommended by the manufacturer and representative of their typical operation in the field unless such installation and operation is inconsistent with any requirement of the test procedure. The specific components and accessories listed in the subsequent sections shall be operated as stated during the test.

1.3.1. Energy Management Systems. Applicable energy management systems may be activated during the test procedure provided they are permanently installed on the case, configured as sold and in such a manner so as to operate automatically without the intervention of the operator, and do not conflict with any of other requirements for a valid test as specified in this appendix.

1.3.2. Lighting. Energize all lighting, except customer display signs/lights as described in section 1.3.3 and UV lighting as described in section 1.3.6 of this appendix, to the maximum illumination level for the duration of testing. However, if a closed solid unit of commercial refrigeration equipment includes an automatic lighting control system that can turn off internal case lighting when the door is closed, and the manufacturer recommends the use of this system in writing in the product literature delivered with the unit, then the lighting control should be operated in the automatic setting, even if the model has a manual switch that disables the automatic lighting control.

1.3.3. Customer display signs/lights. Do not energize supplemental lighting that exists solely for the purposes of advertising or drawing attention to the case and is not integral to the operation of the case.

1.3.4. Condensate pan heaters and pumps. For self-contained equipment only, all electric resistance condensate heaters and condensate pumps must be installed and operational during the test. This includes the stabilization period (including pull-down), steady-state, and performance testing periods. Prior to the start of the stabilization period as defined by ASHRAE 72-2005 (incorporated by reference, see §431.63), the condensate pan must be dry. Following the start of the stabilization period, allow any condensate moisture generated to accumulate in the pan. Do not manually add or remove water from the condensate pan at any time during the test.

1.3.5. Anti-sweat door heaters. Anti-sweat door heaters must be in operation during the entirety of the test procedure. Models with a user-selectable setting must have the heaters energized and set to the maximum usage position. Models featuring an automatic, non-user-adjustable controller that turns on or off based on environmental conditions must be operating in the automatic state. If a unit is not shipped with a controller from the point of manufacture and is intended to be used with an automatic, non-user-adjustable controller, test the unit with a manufacturer-recommended controller that turns on or off based on environmental conditions.

1.3.6. Ultraviolet lights. Do not energize ultraviolet lights during the test.

1.3.7. Illuminated temperature displays and alarms. All illuminated temperature displays and alarms shall be energized and operated during the test as they would be during normal field operation.

1.3.8. Condenser filters. Remove any nonpermanent filters that are provided to prevent particulates from blocking a model's condenser coil.

1.3.9. Refrigeration system security covers. Remove any devices used to secure the condensing unit against unwanted removal.

1.3.10. Night curtains and covers. Do not deploy night curtains or covers.

1.3.11. Grill options. Remove any optional, non-standard grills used to direct airflow.

1.3.12. Misting or humidification systems. Misting or humidification systems must be inactive during the test.

1.3.13. Air purifiers. Air purifiers must be inactive during the test.

1.3.14. General purpose outlets. During the test, do not connect any external load to any general purpose outlets contained within a unit.

1.3.15. Crankcase heaters. Crankcase heaters must be operational during the test. If a control system, such as a thermostat or electronic controller, is used to modulate the operation of the crankcase heater, it must be activated during the test.

1.3.16. Drawers. Drawers are to be treated as identical to doors when conducting the DOE test procedure. Commercial refrigeration equipment with drawers should be configured with the drawer pans that allow for the maximum packing of test simulators and filler packages without the filler packages and test simulators exceeding 90 percent of the refrigerated volume. Packing of test simulators and filler packages shall be in accordance with the requirements for commercial refrigerators without shelves, as specified in section 6.2.3 of ASHRAE 72-2005 (incorporated by reference, see §431.63).

2. Test Conditions

2.1. Integrated Average Temperatures. Conduct the testing required in section 1 and 2 of this appendix A, and determine the daily energy consumption at the applicable integrated average temperature as found in the following table.

CategoryTest procedureIntegrated average temperature
(i) Refrigerator with Solid Door(s)ARI Standard
1200-20061
38 °F (±2 °F).
(ii) Refrigerator with Transparent Door(s)ARI Standard
1200-20061
38 °F (±2 °F).
(iii) Freezer with Solid Door(s)ARI Standard
1200-20061
0 °F (±2 °F).
(iv) Freezer with Transparent Door(s)ARI Standard
1200-20061
0 °F (±2 °F).
(v) Refrigerator-Freezer with Solid Door(s)ARI Standard
1200-20061
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
1200-20061
38 °F (±2 °F).
(vii) Ice-Cream FreezerARI Standard
1200-20061
−15.0 °F (±2 °F).
(viii) Commercial Refrigerator, Freezer, and Refrigerator-Freezer with a Self-Contained Condensing Unit and without DoorsARI Standard
1200-20061
(A) 0 °F (±2 °F) for low temperature applications.
(B) 38 °F (±2 °F) for medium temperature applications.
(ix) Commercial Refrigerator, Freezer, and Refrigerator-Freezer with a Remote Condensing UnitARI Standard
1200-20061
(A) 0 °F (±2 °F) for low temperature applications.
(B) 38 °F (±2 °F) for medium temperature applications.

1Incorporated by reference, see §431.63.

2.2. Lowest Application Product Temperature. If a unit of commercial refrigeration equipment is not able to be operated at the integrated average temperature specified in the table in paragraph 2.1, test the unit at the lowest application product temperature (LAPT), as defined in §431.62. For units equipped with a thermostat, LAPT is 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 is the temperature achieved with the dew point temperature (as defined in AHRI Standard 1200 (I-P)-2010 (incorporated by reference see §431.63)) set to 5 degrees colder than that required to maintain the manufacturer's lowest specified operating temperature.

2.3. Testing at NSF Test Conditions. 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 the 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, must 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 applicable temperature specification provided in paragraph 2.1 of this appendix, 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.

3. Volume and Total Display Area

3.1. Determination of Volume. Determine the volume of a commercial refrigerator, freezer, refrigerator-freezer, or ice-cream freezer using the method 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.”

3.2. Determination of Total Display Area. Determine the total display area of a commercial refrigerator, freezer, refrigerator-freezer, or ice-cream freezer using the method set forth in ARI Standard 1200-2006 (incorporated by reference, see §431.63), but disregarding the specification that “transparent material (≥65% light transmittance) in Appendix D. Specifically, total display area shall be the sum of the projected area(s) of visible product, expressed in ft2 (i.e., portions through which product can be viewed from an angle normal, or perpendicular, to the transparent area). Determine L as the interior length of the CRE model, provided no more than 10 percent of that length consists of non-transparent material. For those cases with greater than 10 percent of non-transparent area, L shall be determined as the projected linear dimension(s) of visible product plus 10 percent of non-transparent area.

See Figures A3.1, A3.2, A3.3, A3.4, and A3.5 as examples of how to calculate the dimensions associated with calculation of total display area. In the diagrams, Dh and L represent the dimensions of the projected visible product.

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[79 FR 22308, Apr. 21, 2014]

Appendix B to Subpart C of Part 431—Amended Uniform Test Method for the Measurement of Energy Consumption of Commercial Refrigerators, Freezers, and Refrigerator-Freezers

Note: Any representations made on or after March 28, 2017, with respect to the energy use or efficiency of commercial refrigeration equipment must be made in accordance with the results of testing pursuant to this appendix.

1. Test Procedure

1.1. Determination of Daily Energy Consumption. 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.”

1.2. Methodology for Determining Applicability of Transparent Door Equipment Families

To determine if a door for a given model of commercial refrigeration equipment is transparent: (1) Calculate the outer door surface area including frames and mullions; (2) calculate the transparent surface area within the outer door surface area excluding frames and mullions; (3) calculate the ratio of (2) to (1) for each of the outer doors; and (4) the ratio for the transparent surface area of all outer doors must be greater than 0.25 to qualify as a transparent equipment family.

1.3. Additional Specifications for Testing of Components and Accessories. All standard components that would be used during normal operation of the basic model in the field shall be installed and used during testing as recommended by the manufacturer and representative of their typical operation in the field unless such installation and operation is inconsistent with any requirement of the test procedure. The specific components and accessories listed in the subsequent sections shall be operated as stated during the test.

1.3.1. Energy Management Systems. Applicable energy management systems may be activated during the test procedure provided they are permanently installed on the case, configured and sold in such a manner so as to operate automatically without the intervention of the operator, and do not conflict with any of other requirements for a valid test as specified in this appendix.

1.3.2. Lighting. All lighting except for customer display signs/lights as described in section 1.3.3 and UV lighting as described in section 1.3.6 of this appendix shall be energized to the maximum illumination level for the duration of testing for commercial refrigeration equipment with lighting except when the unit is equipped with lighting occupancy sensors and controls. If the unit includes an automatic lighting control system, it should be enabled during test. If the unit is equipped with lighting occupancy sensors and controls in should be tested in accordance with section 1.3.2.1 of this appendix.

1.3.2.1. Lighting Occupancy Sensors and Controls. For units with lighting occupancy sensors and/or scheduled lighting controls installed on the unit, determine the effect of the controls/sensors on daily energy consumption 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 during 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 during 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).

1.3.2.1.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 that dim or turn off lighting, respectively, as shown in the following equation:

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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.

1.3.2.1.ii. If using a physical test to determine the daily energy consumption, 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.

1.3.2.1.iii. If using a calculation method to determine the daily energy consumption—

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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

1.3.2.1.iii.C. For remote condensing units, calculate the revised compressor energy consumption (CECR) by adding the CECA 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 is 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).

1.3.2.1.iii.D. For self-contained units, the TDEC for the entire case is 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.

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1.3.3. Customer display signs/lights. Do not energize supplemental lighting that exists solely for the purposes of advertising or drawing attention to the case and is not integral to the operation of the case.

1.3.4. Condensate pan heaters and pumps. For self-contained equipment only, all electric resistance condensate heaters and condensate pumps must be installed and in operation during the test. This includes the stabilization period (including pull-down), steady-state, and performance testing periods. Prior to the start of the stabilization period as defined by ASHRAE 72-2005 (incorporated by reference, see §431.63), the condensate pan must be dry. Following the start of the stabilization period, allow any condensate moisture generated to accumulate in the pan. Do not manually add or remove water to or from the condensate pan at any time during the test.

1.3.5. Anti-sweat door heaters. Anti-sweat door heaters must be operational during the entirety of the test procedure. Models with a user-selectable setting must have the heaters energized and set to the maximum usage position. Models featuring an automatic, non-user-adjustable controller that turns on or off based on environmental conditions must be operating in the automatic state. If a unit is not shipped with a controller from the point of manufacture and is intended to be used with an automatic, non-user-adjustable controller, test the unit with a manufacturer-recommended controller that turns on or off based on environmental conditions.

1.3.6. Ultraviolet lights. Do not energize ultraviolet lights during the test.

1.3.7. Illuminated temperature displays and alarms. All illuminated temperature displays and alarms shall be energized and operated during the test as they would be during normal field operation.

1.3.8. Condenser filters. Remove any nonpermanent filters that are provided to prevent particulates from blocking a model's condenser coil.

1.3.9. Refrigeration system security covers. Remove any devices used to secure the condensing unit against unwanted removal.

1.3.10. Night curtains and covers. For display cases sold with night curtains installed, the night curtain shall be employed for 6 hours; beginning 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.

1.3.11. Grill options. Remove any optional non-standard grills used to direct airflow.

1.3.12. Misting or humidification systems. Misting or humidification systems must be inactive during the test.

1.3.13. Air purifiers. Air purifiers must be inactive during the test.

1.3.14. General purpose outlets. During the test, do not connect any external load to any general purpose outlets contained within a unit.

1.3.15. Crankcase heaters. Crankcase heaters must be operational during the test. If a control system, such as a thermostat or electronic controller, is used to modulate the operation of the crankcase heater, it must be utilized during the test.

1.3.16. Drawers. Drawers are to be treated as identical to doors when conducting the DOE test procedure. Commercial refrigeration equipment with drawers should be configured with the drawer pans that allow for the maximum packing of test simulators and filler packages without the filler packages and test simulators exceeding 90 percent of the refrigerated volume. Packing of test simulators and filler packages shall be in accordance with the requirements for commercial refrigerators without shelves, as specified in section 6.2.3 of ASHRAE 72-2005 (incorporated by reference, see §431.63).

2. Test Conditions

2.1. Integrated Average Temperatures. Conduct the testing required in section 1 of this appendix B, and determine the daily energy consumption at the applicable integrated average temperature in the following table.

CategoryTest procedureIntegrated average temperature
(i) Refrigerator with Solid Door(s)AHRI Standard 1200 (I-P)-2010138 °F (±2 °F).
(ii) Refrigerator with Transparent Door(s)AHRI Standard 1200 (I-P)-2010138 °F (±2 °F).
(iii) Freezer with Solid Door(s)AHRI Standard 1200 (I-P)-201010 °F (±2 °F).
(iv) Freezer with Transparent Door(s)AHRI Standard 1200 (I-P)-201010 °F (±2 °F).
(v) Refrigerator-Freezer with Solid Door(s)AHRI Standard 1200 (I-P)-2010138 °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 DoorsAHRI Standard 1200 (I-P)-2010138 °F (±2 °F).
(vii) Ice-Cream FreezerAHRI Standard 1200 (I-P)-20101−15.0 °F (±2 °F).
(viii) Commercial Refrigerator, Freezer, and Refrigerator-Freezer with a Self-Contained Condensing Unit and without DoorsAHRI Standard 1200 (I-P)-20101(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 UnitAHRI Standard 1200 (I-P)-20101(A) 0 °F (±2 °F) for low temperature applications.
(B) 38.0 °F (±2 °F) for medium temperature applications.

1Incorporated by reference, see §431.63.

2.2. Lowest Application Product Temperature. If a unit of commercial refrigeration equipment is not able to be operated at the integrated average temperature specified in the table in paragraph 2.1 of this appendix, test the unit at the lowest application product temperature (LAPT), as defined in §431.62. For units equipped with a thermostat, LAPT is 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 is the temperature achieved with the dew point temperature (as defined in AHRI Standard 1200 (I-P)-2010 (incorporated by reference, see §431.63)) set to 5 degrees colder than that required to maintain the manufacturer's lowest specified application temperature.

2.3. Testing at NSF Test Conditions. 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 the 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, must 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 applicable temperature specification provided in paragraph 2.1 of this appendix, 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.

3. Volume and Total Display Area

3.1. Determination of Volume. Determine the volume of a 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.”

3.2. Determination of Total Display Area. Determine the total display area of a commercial refrigerator, freezer, refrigerator-freezer, or ice-cream freezer using the method set forth in ARI Standard 1200-2006 (incorporated by reference, see §431.63), but disregarding the specification that “transparent material (≥65% light transmittance) in Appendix D. Specifically, total display area shall be the sum of the projected area(s) of visible product, expressed in ft2 (i.e., portions through which product can be viewed from an angle normal, or perpendicular, to the transparent area). Determine L as the interior length of the CRE model, provided no more than 5 inches of that length consists of non-transparent material. For those cases with greater than 5 inches of non-transparent area, L shall be determined as the projected linear dimension(s) of visible product plus 5 inches of non-transparent area.

See Figures A3.1, A3.2, and A3.3 as examples of how to calculate the dimensions associated with calculation of total display area. In the diagrams, Dh and L represent the dimensions of the projected visible product.

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[79 FR 22308, Apr. 21, 2014]

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