(a) In this section--
(1) The term ``AV'' means the adjusted volume (ft\3\) (defined as 1.63 x frozen temperature compartment volume (ft\3\) + chilled temperature compartment volume (ft\3\)) 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 (ft\3\) (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 (ft\2\) of the case, as defined in ARI Standard 1200-2006, appendix D (incorporated by reference, see Sec. 431.63). For the purpose of paragraph (e) of this section, the term ``TDA'' means the total display area (ft\2\) of the case, as defined in AHRI Standard 1200 (I-P)-2010, appendix D (incorporated by reference, see Sec. 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: ------------------------------------------------------------------------
(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: ------------------------------------------------------------------------
Maximum daily energy
Category consumption (kilowatt hours
per day)------------------------------------------------------------------------Refrigerators with solid doors............ 0.10V + 2.04.Refrigerators with transparent doors...... 0.12V + 3.34.Freezers with solid doors................. 0.40V + 1.38.Freezers with transparent doors........... 0.75V + 4.10.Refrigerator/freezers with solid doors.... the 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 x TDA + 1.0. As used in the preceding sentence, ``TDA'' means the total display area (ft\2\) of the case, as defined in the AHRI Standard 1200 (I-P)-2010, appendix D (incorporated by reference, see Sec. 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: --------------------------------------------------------------------------------------------------------------------------------------------------------
Rating Operating
Equipment category Condensing unit Equipment family temp. temp. Equipment class Maximum daily energy
configuration ([deg]F) ([deg]F) designation \*\ consumption (kWh/day)--------------------------------------------------------------------------------------------------------------------------------------------------------Remote Condensing Commercial Remote (RC)........... Vertical Open (VOP)... 38 (M) =32=32=32=32=32=32=32=32=32=32=32=32
Freezers.
0 (L) <32 VOP.RC.L.......... 2.2 x TDA + 6.85.
Semivertical Open 38 (M) =32
0 (L) <32 SVO.RC.L.......... 2.2 x TDA + 6.85.
Horizontal Open (HZO). 38 (M) =32
0 (L) <32 HZO.RC.L.......... 0.55 x TDA + 6.88.
Vertical Closed 38 (M) =32
0 (L) <32 VCT.RC.L.......... 0.49 x TDA + 2.61.
Horizontal Closed 38 (M) =32
0 (L) <32 HCT.RC.L.......... 0.34 x TDA + 0.26.
Vertical Closed Solid 38 (M) =32
0 (L) <32 VCS.RC.L.......... 0.21 x V + 0.54.
Horizontal Closed 38 (M) =32
0 (L) <32 HCS.RC.L.......... 0.21 x V + 0.54.
Service Over Counter 38 (M) =32
0 (L) <32 SOC.RC.L.......... 0.93 x TDA + 0.22.Self-Contained Commercial Self-Contained (SC)... Vertical Open (VOP)... 38 (M) =32
Freezers Without Doors.
0 (L) <32 VOP.SC.L.......... 4.25 x TDA + 11.82.
Semivertical Open 38 (M) =32
0 (L) <32 SVO.SC.L.......... 4.26 x TDA + 11.51.
Horizontal Open (HZO). 38 (M) =32
0 (L) <32 HZO.SC.L.......... 1.9 x TDA + 7.08.Self-Contained Commercial Self-Contained (SC)... Vertical Closed 38 (M) =32
Freezers With Doors.
0 (L) <32 VCT.SC.L.......... 0.29 x V + 2.95.
Vertical Closed Solid 38 (M) =32
........ <32 VCS.SC.L.......... 0.22 x V + 1.38.
Horizontal Closed 38 (M) =32
0 (L) <32 HCT.SC.L.......... 0.08 x V + 1.23.
Horizontal Closed ........ =32
0 (L) <32 HCS.SC.L.......... 0.06 x V + 1.12.
Service Over Counter ........ =32
0 (L) <32 SOC.SC.L.......... 1.1 x TDA + 2.1.Self-Contained Commercial Self-Contained (SC)... Pull-Down (PD)........ 38 (M) =32
Doors for Pull-Down Temperature
Applications.
Commercial Ice-Cream Freezers...... Remote (RC)........... Vertical Open (VOP)... -15 (I) <=-5** VOP.RC.I.......... 2.79 x TDA + 8.7.
Semivertical Open ........ .......... SVO.RC.I.......... 2.79 x TDA + 8.7.
(SVO).
Horizontal Open (HZO). ........ .......... HZO.RC.I.......... 0.7 x TDA + 8.74.
Vertical Closed ........ .......... VCT.RC.I.......... 0.58 x TDA + 3.05.
Transparent (VCT).
Horizontal Closed ........ .......... HCT.RC.I.......... 0.4 x TDA + 0.31.
Transparent (HCT).
Vertical Closed Solid ........ .......... VCS.RC.I.......... 0.25 x V + 0.63.
(VCS).
Horizontal Closed ........ .......... HCS.RC.I.......... 0.25 x V + 0.63.
Solid (HCS).
Service Over Counter ........ .......... SOC.RC.I.......... 1.09 x TDA + 0.26.
(SOC).
Self-Contained (SC)... Vertical Open (VOP)... ........ .......... VOP.SC.I.......... 5.4 x TDA + 15.02.
Semivertical Open ........ .......... SVO.SC.I.......... 5.41 x TDA + 14.63.
(SVO).
Horizontal Open (HZO). ........ .......... HZO.SC.I.......... 2.42 x TDA + 9.
Vertical Closed ........ .......... VCT.SC.I.......... 0.62 x TDA + 3.29.
Transparent (VCT).
Horizontal Closed ........ .......... HCT.SC.I.......... 0.56 x TDA + 0.43.
Transparent (HCT).
Vertical Closed Solid ........ .......... VCS.SC.I.......... 0.34 x V + 0.88.
(VCS).
Horizontal Closed ........ .......... HCS.SC.I.......... 0.34 x V + 0.88.
Solid (HCS).
Service Over Counter ........ .......... SOC.SC.I.......... 1.53 x TDA + 0.36.
(SOC).--------------------------------------------------------------------------------------------------------------------------------------------------------* 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 [deg]F *(-21 [deg]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 Sec. 431.66(d)(2)(i) through (iii), except that where measurements and calculations reference ARI Standard 1200-2006 (incorporated by reference, see Sec. 431.63), AHRI Standard 1200 (I-P)-2010 (incorporated by reference, see Sec. 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 Sec. 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]
Sec. 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 Sec. 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 Sec. 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 Sec. 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 Sec. 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. ------------------------------------------------------------------------
Integrated average
(i) Refrigerator with Solid ARI Standard...... 38 [deg]F (2
[deg]F).(ii) Refrigerator with ARI Standard...... 38 [deg]F (2
[deg]F).(iii) Freezer with Solid ARI Standard...... 0 [deg]F (2
[deg]F).(iv) Freezer with Transparent ARI Standard...... 0 [deg]F (2
[deg]F).(v) Refrigerator-Freezer with ARI Standard...... 38 [deg]F (2
[deg]F) for
refrigerator
compartment. 0
[deg]F (2
[deg]F) for
freezer
compartment.(vi) Commercial Refrigerator ARI Standard...... 38 [deg]F (2
Condensing Unit Designed for [deg]F).
Pull-Down Temperature
Applications and Transparent
Doors.(vii) Ice-Cream Freezer........ ARI Standard...... -15.0 [deg]F (2
(A) 0 [deg]F (2
Freezer with a Self-Contained [deg]F) for low
Condensing Unit and without temperature
Doors. applications.
(B) 38 [deg]F
(2 [deg]F)
for medium
temperature
(A) 0 [deg]F (2
Freezer with a Remote [deg]F) for low
Condensing Unit. temperature
applications.
(B) 38 [deg]F
(2 [deg]F)
for medium
temperature
applications.------------------------------------------------------------------------\1\ Incorporated by reference, see Sec. 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 Sec. 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 Sec. 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 Sec. 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 Sec. 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 ft \2\ (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. [GRAPHIC] [TIFF OMITTED] TR21AP14.000 [GRAPHIC] [TIFF OMITTED] TR21AP14.001 [GRAPHIC] [TIFF OMITTED] TR21AP14.002 [79 FR 22308, Apr. 21, 2014]
Sec. 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 Sec. 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:[GRAPHIC] [TIFF OMITTED] TR21AP14.003 [GRAPHIC] [TIFF OMITTED] TR21AP14.004
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--[GRAPHIC] [TIFF OMITTED] TR21AP14.005
Where EER represents the energy efficiency ratio from Table 1 in AHRI Standard 1200 (I-P)-2010 (incorporated by reference, see Sec. 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 class EER Btu/W------------------------------------------------------------------------Medium..................................................... 11Low........................................................ 7Ice Cream.................................................. 5------------------------------------------------------------------------
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 Sec. 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 Sec. 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.[GRAPHIC] [TIFF OMITTED] TR21AP14.006
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 Sec. 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 Sec. 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. ------------------------------------------------------------------------
Integrated average
(i) Refrigerator with Solid AHRI Standard 1200 38 [deg]F (2
[deg]F).(ii) Refrigerator with AHRI Standard 1200 38 [deg]F (2
[deg]F).(iii) Freezer with Solid AHRI Standard 1200 0 [deg]F (2
[deg]F).(iv) Freezer with Transparent AHRI Standard 1200 0 [deg]F (2
[deg]F).(v) Refrigerator-Freezer with AHRI Standard 1200 38 [deg]F (2
[deg]F) for
refrigerator
compartment.
0 [deg]F (2
[deg]F) for
freezer
compartment.(vi) Commercial Refrigerator AHRI Standard 1200 38 [deg]F (2
Condensing Unit Designed for [deg]F).
Pull-Down Temperature
Applications and Transparent
Doors.(vii) Ice-Cream Freezer........ AHRI Standard 1200 -15.0 [deg]F (2
[deg]F).(viii) Commercial Refrigerator, AHRI Standard 1200 (A) 0 [deg]F (2
Freezer with a Self-Contained [deg]F) for low
Condensing Unit and without temperature
Doors. applications.
(B) 38.0 [deg]F
(2 [deg]F)
for medium
temperature
applications.(ix) Commercial Refrigerator, AHRI Standard 1200 (A) 0 [deg]F (2
Freezer with a Remote [deg]F) for low
Condensing Unit. temperature
applications.
(B) 38.0 [deg]F
(2 [deg]F)
for medium
temperature
applications.------------------------------------------------------------------------\1\ Incorporated by reference, see Sec. 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 Sec. 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 Sec. 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 Sec. 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 Sec. 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 ft\2\ (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.[GRAPHIC] [TIFF OMITTED] TR21AP14.007 [GRAPHIC] [TIFF OMITTED] TR21AP14.008 [GRAPHIC] [TIFF OMITTED] TR21AP14.009 [79 FR 22308, Apr. 21, 2014]