[Federal Register Volume 86, Number 92 (Friday, May 14, 2021)]
[Notices]
[Pages 26496-26504]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2021-10246]


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DEPARTMENT OF ENERGY

[Case Number 2019-009; EERE-2019-BT-WAV-0028]


Energy Conservation Program: Decision and Order Granting a Waiver 
to CellarPro From the Department of Energy Walk-in Coolers and Walk-in 
Freezers Test Procedure

AGENCY: Office of Energy Efficiency and Renewable Energy, Department of 
Energy.

ACTION: Notification of decision and order.

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[[Page 26497]]

SUMMARY: The U.S. Department of Energy (``DOE'') gives notification of 
a Decision and Order (Case Number 2019-009) that grants to CellarPro 
Cooling Systems (``CellarPro'') a waiver from specified portions of the 
DOE test procedure for determining the energy efficiency of specified 
walk-in wine cellar refrigeration systems. Due to the design of 
CellarPro's specific basic models of walk-in wine cellar refrigeration 
systems, the current test procedure evaluates such models in a manner 
that is unrepresentative of their energy use. Under the Decision and 
Order, CellarPro is required to test and rate the specified basic 
models of its walk-in cellar refrigeration systems in accordance with 
the alternate test procedure set forth in the Decision and Order.

DATES: The Decision and Order is effective on May 14, 2021. The 
Decision and Order will terminate upon the compliance date of any 
future amendment to the test procedure for walk-in coolers and walk-in 
freezers located at title 10 of the Code of Federal Regulations 
(``CFR''), part 431, subpart R, appendix C that addresses the issues 
presented in this waiver. At such time, CellarPro must use the relevant 
test procedure for this product for any testing to demonstrate 
compliance with the applicable standards, and any other representations 
of energy use.

FOR FURTHER INFORMATION CONTACT: 
    Ms. Lucy deButts, U.S. Department of Energy, Office of Energy 
Efficiency and Renewable Energy, Building Technologies Office, EE-5B, 
1000 Independence Avenue SW, Washington, DC, 20585-0121. Email: 
[email protected].
    Mr. Michael Kido, U.S. Department of Energy, Office of the General 
Counsel, Mail Stop GC-33, Forrestal Building, 1000 Independence Avenue 
SW, Washington, DC 20585-0103. Telephone: (202) 586-8145. Email: 
[email protected].

SUPPLEMENTARY INFORMATION: In accordance with section 431.401(f)(2) of 
Title 10 of the Code of Federal Regulations (``CFR'') (10 CFR 
431.401(f)(2)), DOE gives notification of the issuance of its Decision 
and Order as set forth below. The Decision and Order grants CellarPro a 
waiver from the applicable test procedure at 10 CFR part 431, subpart 
R, appendix C for specified basic models of walk-in cooler 
refrigeration systems, and provides that CellarPro must test and rate 
such walk-in cooler refrigeration systems using the alternate test 
procedure specified in the Decision and Order. CellarPro's 
representations concerning the energy efficiency of the specified basic 
models must be based on testing according to the provisions and 
restrictions in the alternate test procedure set forth in the Decision 
and Order, and the representations must fairly disclose the test 
results. Distributors, retailers, and private labelers are held to the 
same requirements when making representations regarding the energy 
efficiency of these products. (42 U.S.C. 6314(d))
    Manufacturers not currently distributing equipment in commerce in 
the United States that employ a technology or characteristic that 
results in the same need for a waiver from the applicable test 
procedure must petition for and be granted a waiver prior to the 
distribution in commerce of that equipment in the United States. 
Manufacturers may also submit a request for interim waiver pursuant to 
the requirements of 10 CFR 431.401. (10 CFR 431.401(j))

Case #2019-009

Decision and Order

I. Background and Authority

    The Energy Policy and Conservation Act, as amended (``EPCA''),\1\ 
authorizes the U.S. Department of Energy (``DOE'') to regulate the 
energy efficiency of a number of consumer products and certain 
industrial equipment. (42 U.S.C. 6291-6317) Title III, Part C \2\ of 
EPCA established the Energy Conservation Program for Certain Industrial 
Equipment, which sets forth a variety of provisions designed to improve 
the energy efficiency for certain types of industrial equipment. This 
equipment includes walk-in coolers and walk-in freezers (collectively, 
``walk-ins''), the focus of this document. (42 U.S.C. 6311(1)(G))
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    \1\ All references to EPCA in this document refer to the statute 
as amended through the Energy Act of 2020, Public Law 116-260 (Dec. 
27, 2020).
    \2\ For editorial reasons, upon codification in the U.S. Code, 
Part C was redesignated as Part A-1.
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    The energy conservation program under EPCA consists essentially of 
four parts: (1) Testing, (2) labeling, (3) Federal energy conservation 
standards, and (4) certification and enforcement procedures. Relevant 
provisions of EPCA include definitions (42 U.S.C. 6311), test 
procedures (42 U.S.C. 6314), labeling provisions (42 U.S.C. 6315), 
energy conservation standards (42 U.S.C. 6313), and the authority to 
require information and reports from manufacturers (42 U.S.C. 6316; 42 
U.S.C. 6299).
    The Federal testing requirements consist of test procedures that 
manufacturers of covered equipment must use as the basis for: (1) 
Certifying to DOE that their equipment complies with the applicable 
energy conservation standards adopted pursuant to EPCA (42 U.S.C. 
6316(a); 42 U.S.C. 6295(s)), and (2) making representations about the 
efficiency of that equipment (42 U.S.C. 6314(d)). Similarly, DOE must 
use these test procedures to determine whether the equipment complies 
with relevant standards promulgated under EPCA. (42 U.S.C. 6316(a); 42 
U.S.C. 6295(s))
    Under 42 U.S.C. 6314, EPCA sets forth the criteria and procedures 
DOE is required to follow when prescribing or amending test procedures 
for covered walk-ins. EPCA requires that any test procedures prescribed 
or amended under this section must be reasonably designed to produce 
test results which reflect energy efficiency, energy use or estimated 
annual operating cost of walk-ins during a representative average use 
cycle and requires that test procedures not be unduly burdensome to 
conduct. (42 U.S.C.6314(a)(2)) The test procedure for walk-ins is set 
forth in the Code of Federal Regulations (``CFR'') at 10 CFR part 431, 
subpart R, appendix C, Uniform Test Method for the Measurement of Net 
Capacity and AWEF of Walk-in Cooler and Walk-in Freezer Refrigeration 
Systems (``Appendix C'').
    Any interested person may submit a petition for waiver from DOE's 
test procedure requirements. 10 CFR 431.401(a)(1). DOE will grant a 
waiver from the test procedure requirements if DOE determines either 
that the basic model for which the waiver was requested contains a 
design characteristic that prevents testing of the basic model 
according to the prescribed test procedures, or that the prescribed 
test procedures evaluate the basic model in a manner so 
unrepresentative of its true energy consumption characteristics as to 
provide materially inaccurate comparative data. 10 CFR 431.401(f)(2). 
DOE may grant the waiver subject to conditions, including adherence to 
alternate test procedures. Id.
    As soon as practicable after the granting of any waiver, DOE will 
publish in the Federal Register a notice of proposed rulemaking to 
amend its regulations so as to eliminate any need for the continuation 
of such waiver. 10 CFR 431.401(l). As soon thereafter as practicable, 
DOE will publish in the Federal Register a final rule to that effect. 
Id. When DOE amends the test procedure to address the issues presented 
in a waiver, the waiver will automatically terminate on the date on 
which use of that test procedure is required to demonstrate compliance. 
10 CFR 431.401(h)(3).

[[Page 26498]]

II. CellarPro's Petition for Waiver: Assertions and Determinations

    On September 13, 2019, CellarPro submitted a petition for an 
interim waiver from the DOE test procedure applicable to walk-ins set 
forth in Appendix C. (CellarPro, No. 1 at p. 1 \3\) The waiver process 
under 10 CFR 431.401 requires that a petition for interim waiver must 
reference the related petition for waiver. (10 CFR 431.401(b)(2)) 
CellarPro confirmed in a May 29, 2020 email that the petition should 
also be considered as a petition for waiver. (CellarPro, No. 4) 
CellarPro stated that the specified basic models of walk-in cooler 
refrigeration systems are intended to operate at a temperature range of 
45 [deg]F to 65 [deg]F and 50 to 70 percent relative humidity (``RH''), 
rather than the 35 [deg]F with less than 50 percent RH test conditions 
prescribed by the test procedure for walk-in cooler applications. 
CellarPro stated that the units operate at temperature and relative 
humidity ranges optimized for long-term storage of wine and that they 
are usually located in air-conditioned spaces. CellarPro asserted that 
testing at 35 [deg]F would be unrepresentative of the true energy 
consumption characteristics of the specified units and that operation 
at this temperature may damage the specified units. On October 2, 2020, 
CellarPro submitted an updated petition for waiver and interim waiver 
stating that all basic models listed in the petition for waiver and 
interim waiver cannot be operated at a temperature less than 45 [deg]F 
and provided DOE with maximum external static pressure values for the 
specified basic models, which are all capable of being installed with a 
duct.\4\ (CellarPro, No. 6)
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    \3\ A notation in the form ``CellarPro, No. 1'' identifies a 
written submission: (1) Made by CellarPro; and (2) recorded in 
document number 1 that is filed in the docket of this petition for 
waiver (Docket No. EERE-2019-BT-WAV-0028) and available at http://www.regulations.gov.
    \4\ The October 2, 2020 update was consistent with a letter from 
the Air-Conditioning, Heating, and Refrigeration Institute 
(``AHRI'') recommending that a 45 [deg]F minimum temperature be used 
for testing wine cellar cooling systems, and that testing be 
conducted at an external static pressure (``ESP'') value equal to 50 
percent of the maximum ESP to be specified by manufacturers for each 
basic model. The AHRI letter is available at Docket No. EERE-2019-
BT-WAV-0028-0005.
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    On March 1, 2021, DOE published a notification announcing its 
receipt of the petition for waiver and granted CellarPro an interim 
waiver. 86 FR 11972 (``Notification of Petition for Waiver''). In the 
Notification of Petition for Waiver, DOE noted that a number of the 
basic models of walk-in refrigeration systems identified by CellarPro 
in its petition are single-package systems. CellarPro noted that it is 
difficult to install mass flow meters for testing these small footprint 
systems. DOE agreed that because of their single-package design, these 
basic models have insufficient space within the units and insufficient 
lengths of liquid line and evaporator outlet line for the dual mass 
flow meters (two independent meters) and the dual temperature and 
pressure measurements (two independent sets of measurement equipment) 
required by the test procedure's refrigerant enthalpy method. 86 FR 
11972, 11974. AHRI 1250-2009 (``Standard for Performance Rating of 
Walk-in Coolers and Freezers'' \5\)--the industry testing standard on 
which DOE's test procedure is based--does not include specific 
provisions for testing single-package systems, and testing these basic 
models using the refrigerant enthalpy method as required by Appendix C 
would require extensive additional piping to route the pipes out of the 
system--where the components could be installed--and then back in. This 
additional piping would impact unit performance, would likely be 
inconsistent between test labs, and would result in unrepresentative 
test values for the unit under test. AHRI has published a revised 
version of the test standard that provides provisions for single-
package systems without requiring extensive additional piping (AHRI 
1250-2020, 2020 Standard for Performance Rating of Walk-in Coolers and 
Freezers).
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    \5\ This also includes the related Errata sheet published by 
AHRI, dated December 2015.
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    In the Notification of Petition for Waiver, DOE established an 
alternate test procedure that was a modified version of the alternate 
test procedure suggested by CellarPro. 86 FR 11972, 11975-11980. 
Specifically, the required alternate test procedure establishes unit 
cooler air inlet conditions of 55 [deg]F and 55 percent RH, specifies 
primary and secondary capacity measurement methods for single-package 
systems, requires testing at 50 percent of maximum external static 
pressure for ducted units, and defines wine cellar box load and 
evaporator cycle periods for calculation of Annual Walk-in Energy 
Factor (``AWEF'') for the specified basic models of walk-in cooler 
refrigeration systems. Id. DOE solicited comments from interested 
parties on all aspects of the petition and the modified alternate test 
procedure. Id.
    DOE received one comment, which was submitted by the Pacific Gas 
and Electric Company, San Diego Gas and Electric, and Southern 
California Edison (collectively, ``the CA IOUs'').\6\ The CA IOUs 
recommended that DOE consider changes to the walk-in cooler and walk-in 
freezer labeling requirements and to the definitions applicable to 
walk-in cooler refrigeration systems in order to differentiate between 
walk-in cooler refrigeration systems and walk-in cooler refrigeration 
systems that are wine cooler systems. The CA IOUs stated that the 
current labeling requirements would classify a wine cellar walk-in 
cooler as a standard walk-in cooler, despite the difference in testing 
requirements. The CA IOUs suggested that manufacturer materials should 
be required to report use of an alternate test procedure. The CA IOUs 
stated that otherwise, there may be confusion in the market. (CA IOUs, 
No 15 at pp. 1-2)
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    \6\ Comments available in Docket No. EERE-2019-BT-WAV-0028-0015 
at http://www.regulations.gov.
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    The current definition and labeling requirements for walk-in 
coolers do not distinguish between walk-in cooler refrigeration systems 
generally and walk-in cooler refrigeration systems for wine cellars. As 
discussed, CellarPro stated that the subject units are unable to 
operate at a temperature less than 45 [deg]F. Because of the inability 
to operate at lower temperatures and the specific application to wine 
cellars, there is unlikely to be confusion in the market between the 
subject units and other walk-in cooler refrigeration systems.
    In addition, the CA IOUs reiterated comments that they submitted in 
response to a notice of proposed rulemaking regarding testing 
provisions for hot gas defrost in the walk-in cooler test procedure (85 
FR 60724; September 28, 2020).\7\ Specifically, the CA IOUs recommended 
that DOE address several open test procedure waivers (including those 
for walk-in wine cellars) and recommendations from the 2015 Appliance 
Standards and Rulemaking Federal Advisory Committee working group 
related to improving the representativeness of the test procedure.
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    \7\ Comments available in Docket No. EERE-2020-BT-TP-0016-0004 
at https://www.regulations.gov.
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    In accordance with 10 CFR 431.401, this Decision and Order 
addresses the petition for waiver submitted by CellarPro and is limited 
to the basic models specified in the Order. As stated, as soon as 
practicable after the granting of this and any waiver, DOE will publish 
in the Federal Register a notice of proposed rulemaking to amend its 
regulations so as to eliminate any need for the continuation of such 
waiver. 10 CFR 431.401(l).
    For the reasons explained here and in the Notification of Petition 
for Waiver,

[[Page 26499]]

absent a waiver the basic models identified by CellarPro in its 
petition cannot be tested and rated for energy consumption on a basis 
representative of their true energy consumption characteristics. As 
noted above, the alternate test procedure prescribed in the Interim 
Waiver modified CellarPro's suggested alternate test procedure by 
including ESP provisions for certain systems that can be installed with 
(1) ducted evaporator air, (2) with or without ducted evaporator air, 
(3) ducted condenser air, or (4) with or without ducted condenser air. 
For such systems, testing is conducted at 50 percent of the maximum ESP 
specified by the manufacturer, subject to a tolerance of -0.00/+0.05 
inches of water column (``in. wc.''). (CellarPro, No. 14)
    Selection of a representative ESP equal to half the maximum ESP is 
based on the expectation that most installations will require less than 
the maximum allowable duct length. In the absence of field data, DOE 
expects that a range of duct lengths from the minimal length to the 
maximum allowable length would be used; thus, half of the maximum ESP 
would be representative of most installations.
    Additionally, if the basic model provides multiple condenser or 
unit cooler fan speed settings, the speed setting used is as instructed 
in the unit's installation instructions. However, if the installation 
instructions do not specify a fan speed setting for ducted 
installation, systems that can be installed with ducts would be tested 
with the highest available fan speed. The ESP is set for testing either 
by symmetrically restricting the outlet duct or, if using the indoor 
air enthalpy method, by adjusting the airflow measurement apparatus 
blower.
    The alternate test procedure also describes the requirements for 
measuring ESP consistent with the provisions provided in AHRI 1250-2020 
when using the indoor air enthalpy method with unit coolers.
    Additionally, the alternate test procedure requires that specified 
basic models that are split systems must be tested as matched pairs. 
According to CellarPro's petition, the walk-in refrigeration system 
basic models that are split-systems are sold as full systems (i.e., 
matched pairs) rather than as individual unit cooler and condensing 
unit components. This Order provides no direction regarding refrigerant 
line connection operating conditions, and as such is inapplicable to 
testing the basic models as individual components. Consequently, this 
Order addresses only matched-pair testing of the specified basic models 
that are split-systems.
    For the reasons explained in the Notification of Petition for 
Waiver, the Order does not include a 0.55 correction factor in the 
alternate test procedure as suggested by CellarPro. 86 FR 11972, 11976-
11977. The company had observed that the test procedure in appendix A 
to subpart B of 10 CFR part 430 (``Appendix A''), which applies to 
miscellaneous refrigeration products, includes such a factor to account 
for the difference in use and loading patterns of coolers (e.g., self-
contained wine chiller cabinets) as compared to other residential 
refrigeration products in terms of use and loading patterns, compressor 
efficiency, and required fan power, and sought to include such a factor 
as part of its petition. As explained in the Notice of Petition for 
Waiver, the closed-door conditions on which the miscellaneous 
refrigeration correction factor is based are not present in the test 
procedure for walk-in cooler refrigeration systems, and the referenced 
AHRI 1250-2009 provisions assume a load factor of 50 percent, 
consistent with Appendix C. Id. As a result, applying the 0.55 
correction factor as suggested by CellarPro is not appropriate for the 
specified basic models.
    DOE is requiring that CellarPro test and rate specified walk-in 
wine cellar refrigeration system basic models according to the 
alternate test procedure specified in this Decision and Order. This 
alternate procedure is a modified version of the one suggested by 
CellarPro. The alternate test procedure required under this Order is 
the same alternate test procedure prescribed in the Interim Waiver 
Order.
    This Decision and Order applies only to the basic models listed and 
does not extend to any other basic models. DOE evaluates and grants 
waivers for only those basic models specifically set out in the 
petition, not future models that may be manufactured by the petitioner. 
CellarPro may request that DOE extend the scope of this waiver to 
include additional basic models that employ the same technology as 
those listed in this waiver. 10 CFR 431.401(g). CellarPro may also 
submit another petition for waiver from the test procedure for 
additional basic models that employ a different technology and meet the 
criteria for test procedure waivers. 10 CFR 431.401(a)(1).
    DOE notes that it may modify or rescind the waiver at any time upon 
DOE's determination that the factual basis underlying the petition for 
waiver is incorrect, or upon a determination that the results from the 
alternate test procedure are unrepresentative of the basic models' true 
energy consumption characteristics. 10 CFR 431.401(k)(1). Likewise, 
CellarPro may request that DOE rescind or modify the waiver if the 
company discovers an error in the information provided to DOE as part 
of its petition, determines that the waiver is no longer needed, or for 
other appropriate reasons. 10 CFR 431.401(k)(2).
    As set forth previously, the test procedure specified in this 
Decision and Order is not the same as the test procedure offered by 
CellarPro. If CellarPro believes that the alternate test method it 
suggested provides representative results and is less burdensome than 
the test method required by this Decision and Order, CellarPro may 
submit a request for modification under 10 CFR 431.401(k)(2) that 
addresses the concerns that DOE has specified with that procedure. 
CellarPro may also submit another less burdensome alternative test 
procedure not expressly considered in this notification under the same 
provision.

III. Order

    After careful consideration of all the material that was submitted 
by CellarPro, the various public-facing materials (e.g., marketing 
materials, product specification sheets, and installation manuals) for 
the units identified in the petition, information provided by CellarPro 
and other wine cellar walk-in refrigeration system manufacturers in 
meetings with DOE, and the comment received, in this matter, it is 
Ordered that:
    (1) CellarPro must, as of the date of publication of this Order in 
the Federal Register, test and rate the following CellarPro-branded 
wine cellar walk-in cooler refrigeration system basic models with the 
alternate test procedure as set forth in paragraph (2):

[[Page 26500]]



                                             CellarPro Basic Models
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                                                                                          Maximum      Maximum
                                                                                         evaporator   condenser
                                                                Minimum      Maximum        fan          fan
             Basic model               Catalog models under    operating    operating     external     external
                                         basic model group    temperature  temperature     static       static
                                                                ([deg]F)     ([deg]F)     pressure     pressure
                                                                                           (inwg)       (inwg)
----------------------------------------------------------------------------------------------------------------
1800QTL.............................  1800QTL, 1800QTL-L....           45           65         0.00         0.00
1800QT..............................  1800QT................           45           65         0.00         0.00
1800XT..............................  1800XT................           45           65         0.00         0.00
1800XTS.............................  1800XTS, 1800XTS-B....           45           65         0.00         0.00
1800XTSx............................  1800XTSx..............           45           65         0.00         0.00
1800XT 220V.........................  1800XT 220V...........           45           65         0.00         0.00
1800XTS 220V........................  1800XTS 220V..........           45           65         0.00         0.00
1800XTx 220V........................  1800XTx 220V..........           45           65         0.00         0.00
1800H...............................  1800H.................           51           65         0.09         0.09
1800H 220V..........................  1800H 220V............           51           65         0.09         0.09
2000VS..............................  2000VSi, 2000VSx......           45           65         0.19         0.19
2000VS 220V.........................  2000VSi 220V,.........           45           65         0.19         0.19
                                      2000VSx 220V..........
3200VS..............................  3200VSi, 3200VSx......           45           65         0.25         0.25
4200VS..............................  4200VSi, 4200VSx,.....           45           65         0.25         0.25
                                      4200VSi-B, 4200VSi-L..
4200VS 220V.........................  4200VSi 220V,.........           45           65         0.25         0.25
                                      4200VSx 220V..........
6200VS..............................  6200VSi, 6200VSx......           45           65         0.25         0.25
8200VS..............................  8200VSi, 8200VSx......           45           65         0.25         0.25
3000S...............................  3000S, 3000Sqc........           45           65         0.25         0.00
3000Scm.............................  3000Scm...............           47           65         0.00         0.00
3000Scmr............................  3000Scmr..............           45           65         0.25         0.00
3000Sh..............................  3000Sh, 3000Shqc......           45           65         0.25         0.00
4000S...............................  4000S, 4000Sqc........           45           65         0.25         0.00
4000S 220V..........................  4000S 220V............           45           65         0.25         0.00
4000Scm.............................  4000Scm...............           47           65         0.00         0.00
4000Scmr............................  4000Scmr..............           45           65         0.25         0.00
4000Sh..............................  4000Sh, 4000Shqc......           45           65         0.25         0.00
4000Shwc............................  4000Shwc..............           45           65         0.25         0.00
4000Swc.............................  4000Swc...............           45           65         0.25         0.00
6000S...............................  6000S.................           45           65         0.25         0.00
6000S 220V..........................  6000S 220V............           45           65         0.25         0.00
6000Scm.............................  6000Scm...............           47           65         0.00         0.00
6000Scmr............................  6000Scmr..............           45           65         0.25         0.00
8000S...............................  8000S.................           45           65         0.25         0.00
8000Scm.............................  8000Scm...............           47           65         0.00         0.00
8000Scmr............................  8000Scmr..............           45           65         0.25         0.00
8000Swc.............................  8000Swc...............           45           65         0.25         0.00
AH6500S.............................  AH6500SCv, AH6500SCh,            45           65         0.25         0.25
                                       AH6500Si, AH6500Sx.
AH8500S.............................  AH8500SCv, AH8500SCh,            45           65         0.25         0.25
                                       AH8500Si, AH8500Sx.
AH12Sx..............................  AH12Sx................           45           65         0.30         0.00
AH18Sx..............................  AH18Sx................           45           65         0.30         0.00
AH24Sx..............................  AH24Sx................           45           65         0.30         0.00
----------------------------------------------------------------------------------------------------------------

    (2) The alternate test procedure for the CellarPro basic models 
listed in paragraph (1) of this Order is the test procedure for Walk-in 
Cooler Refrigeration Systems prescribed by DOE at 10 CFR part 431, 
subpart R, appendix C, (``Appendix C to Subpart R'') with the 
modifications provided below. All other requirements of Appendix C and 
DOE's other relevant regulations remain applicable.
    In Appendix C to Subpart R, revise section 3.1.1 (which specifies 
modifications to AHRI 1250-2009 (incorporated by reference; see Sec.  
431.303)) to read:
    3.1.1. In Table 1, Instrumentation Accuracy, refrigerant 
temperature measurements shall have an accuracy of 0.5 
[deg]F for unit cooler in/out. Measurements used to determine 
temperature or water vapor content of the air (i.e. wet bulb or dew 
point) shall be accurate to within 0.25 [deg]F; all other 
temperature measurements shall be accurate to within 1.0 
[deg]F.
    In Appendix C to Subpart R, revise section 3.1.4 (which specifies 
modifications to AHRI 1250-2009) and add modifications of AHRI 1250-
2009 Tables 3 and 4 to read:
    3.1.4. In Tables 3 and 4 of AHRI 1250-2009, Section 5, the 
Condenser Air Entering Wet-Bulb Temperature requirement applies only to 
single-packaged dedicated systems. Tables 3 and 4 shall be modified to 
read:

[[Page 26501]]



                Table 3--Fixed Capacity Matched Refrigerator System and Single-Packaged Dedicated System, Condensing Unit Located Indoor
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                                                      Unit cooler                 Maximum
                                         Unit cooler      air       Condenser    condenser
                                             air        entering       air          air
            Test description               entering     relative     entering     entering           Compressor status               Test objective
                                          dry-bulb,   humidity, %   dry-bulb,    wet-bulb,
                                            [deg]F        \1\         [deg]F       [deg]F
--------------------------------------------------------------------------------------------------------------------------------------------------------
Evaporator Fan Power...................           55           55  ...........  ...........  ................................  Measure fan input wattage
                                                                                                                                \2\
Refrigeration Capacity.................           55           55           90       \3\ 65  Compressor On...................  Determine Net
                                                                                                                                Refrigeration Capacity
                                                                                                                                of Unit Cooler, input
                                                                                                                                power, and EER at Rating
                                                                                                                                Condition
--------------------------------------------------------------------------------------------------------------------------------------------------------
Notes:
1. The test condition tolerance (maximum permissible variation of the average value of the measurement from the specified test condition) for relative
  humidity is 3%.
2. Measure fan input wattage either by measuring total system power when the compressor and condenser are turned off or by separately submetering the
  evaporator fan.
3. Maximum allowable value for Single-Packaged Systems that do not use evaporative Dedicated Condensing Units, where all or part of the equipment is
  located in the outdoor room.


                Table 4--Fixed Capacity Matched Refrigerator System and Single-Packaged Dedicated System, Condensing Unit Located Outdoor
--------------------------------------------------------------------------------------------------------------------------------------------------------
                                                      Unit cooler                 Maximum
                                         Unit cooler      air       Condenser    condenser
                                             air        entering       air          air
            Test description               entering     relative     entering     entering           Compressor status               Test objective
                                          dry-bulb,   humidity, %   dry-bulb,    wet-bulb,
                                            [deg]F        \1\         [deg]F       [deg]F
--------------------------------------------------------------------------------------------------------------------------------------------------------
Evaporator Fan Power...................           55           55  ...........  ...........  ................................  Measure fan input wattage
                                                                                                                                \2\
Refrigeration Capacity A...............           55           55           95       \3\ 68  Compressor On...................  Determine Net
                                                                                                                                Refrigeration Capacity
                                                                                                                                of Unit Cooler, input
                                                                                                                                power, and EER at Rating
                                                                                                                                Condition
Refrigeration Capacity B...............           55           55           59       \3\ 46  Compressor On...................  Determine Net
                                                                                                                                Refrigeration Capacity
                                                                                                                                of Unit Cooler and
                                                                                                                                system input power at
                                                                                                                                moderate condition
Refrigeration Capacity C...............           55           55           35       \3\ 29  Compressor On...................  Determine Net
                                                                                                                                Refrigeration Capacity
                                                                                                                                of Unit Cooler and
                                                                                                                                system input power at
                                                                                                                                cold condition
--------------------------------------------------------------------------------------------------------------------------------------------------------
Notes:
1. The test condition tolerance (maximum permissible variation of the average value of the measurement from the specified test condition) for relative
  humidity is 3%.
2. Measure fan input wattage either by measuring total system power when the compressor and condenser are turned off or by separately submetering the
  evaporator fan.
3. Maximum allowable value for Single-Packaged Dedicated Systems that do not use evaporative Dedicated Condensing Units, where all or part of the
  equipment is located in the outdoor room.

    In Appendix C to Subpart R, following section 3.2.5 (instructions 
regarding modifications to AHRI 1250-2009), add sections 3.2.6 and 
3.2.7 to read:
    3.2.6. The purpose in section C1 of appendix C is modified by 
extending it to include Single-Packaged Dedicated Systems.
    3.2.7. For general test conditions and data recording (appendix C, 
section C7), the test acceptance criteria in Table 2 and the data to be 
recorded in Table C2 apply to the Dual Instrumentation and Calibrated 
Box methods of test.
    In Appendix C to Subpart R, revise section 3.3 to read:
    3.3. Matched systems, single-packaged dedicated systems, and unit 
coolers tested alone: Test any split system wine cellar walk-in 
refrigeration system as a matched pair. Any condensing unit or unit 
cooler component must be matched with a corresponding counterpart for 
testing. Use the test method in AHRI 1250-2009 (incorporated by 
reference; see Sec.  431.303), appendix C as the method of test for 
matched refrigeration systems, single-packaged dedicated systems, or 
unit coolers tested alone, with the following modifications:
* * * * *
    In Appendix C to Subpart R, revise sections 3.3.3 through 3.3.3.2 
to read:
    3.3.3. Evaporator fan power.
    3.3.3.1. The unit cooler fan power consumption shall be measured in 
accordance with the requirements in Section C3.5 of AHRI 1250-2009. 
This measurement shall be made with the fan operating at full speed, 
either measuring unit cooler or total system power input upon the 
completion of the steady state test when the compressors and condenser 
fan of the walk-in system is turned off, or by submetered measurement 
of the evaporator fan power during the steady state test.
    Section C3.5 of AHRI 1250-2009 is revised to read:
    Unit Cooler Fan Power Measurement. The following shall be measured 
and recorded during a fan power test.

EFcomp,on Total electrical power input to fan motor(s) of 
Unit Cooler, W
FS Fan speed (s), rpm
N Number of motors
Pb Barometric pressure, in. Hg
Tdb Dry-bulb temperature of air at inlet, [deg]F
Twb Wet-bulb temperature of air at inlet, [deg]F
V Voltage of each phase, V


[[Page 26502]]


    For a given motor winding configuration, the total power input 
shall be measured at the highest nameplated voltage. For three-phase 
power, voltage imbalance shall be no more than 2%.
    3.3.3.2. Evaporator fan power for the off-cycle is equal to the on-
cycle evaporator fan power with a run time of ten percent of the off-
cycle time.

EFcomp,off = 0.1 x EFcomp,on

    In Appendix C to Subpart R, following section 3.3.7.2, add new 
sections 3.3.8, 3.3.9, and 3.3.10 to read:
    3.3.8. Measure power and capacity of single-packaged dedicated 
systems as described in sections C4.1.2 and C9 of AHRI 1250-2020. The 
third and fourth sentences of Section C9.1.1.1 of AHRI 1250-2020 
(``Entering air is to be sufficiently dry as to not produce frost on 
the Unit Cooler coil. Therefore, only sensible capacity measured by dry 
bulb change shall be used to calculate capacity.'') shall not apply.
    3.3.9. For systems with ducted evaporator air, or that can be 
installed with or without ducted evaporator air: Connect ductwork on 
both the inlet and outlet connections and determine external static 
pressure as described in ASHRAE 37-2009, sections 6.4 and 6.5. Use 
pressure measurement instrumentation as described in ASHRAE 37-2009 
section 5.3.2. Test at the fan speed specified in manufacturer 
installation instructions--if there is more than one fan speed setting 
and the installation instructions do not specify which speed to use, 
test at the highest speed. Conduct tests with the external static 
pressure equal to 50 percent of the maximum external static pressure 
allowed by the manufacturer for system installation within a tolerance 
of -0.00/+0.05 in. wc. If testing with the indoor air enthalpy method, 
adjust the airflow measurement apparatus fan to set the external static 
pressure--otherwise, set the external static pressure by symmetrically 
restricting the outlet of the test duct. In case of conflict, these 
requirements for setting evaporator airflow take precedence over 
airflow values specified in manufacturer installation instructions or 
product literature.
    3.3.10. For systems with ducted condenser air, or that can be 
installed with or without ducted condenser air: Connect ductwork on 
both the inlet and outlet connections and determine external static 
pressure as described in ASHRAE 37-2009, sections 6.4 and 6.5. Use 
pressure measurement instrumentation as described in ASHRAE 37-2009 
section 5.3.2. Test at the fan speed specified in manufacturer 
installation instructions--if there is more than one fan speed setting 
and the installation instructions do not specify which speed to use, 
test at the highest speed. Conduct tests with the external static 
pressure equal to 50 percent of the maximum external static pressure 
allowed by the manufacturer for system installation within a tolerance 
of -0.00/+0.05 in. wc. If testing with the outdoor enthalpy method, 
adjust the airflow measurement apparatus fan to set the external static 
pressure--otherwise, set the external static pressure by symmetrically 
restricting the outlet of the test duct. In case of conflict, these 
requirements for setting condenser airflow take precedence over airflow 
values specified in manufacturer installation instructions or product 
literature. If testing using the outdoor air enthalpy method, the 
requirements of section 8.6 of ASHRAE 37-2009 are not applicable.
    In Appendix C to Subpart R, revise section 3.3.6 (which specifies 
modifications to AHRI 1250-2009) to read:
    3.3.6. AWEF is calculated on the basis that walk-in box load is 
equal to half of the system net capacity, without variation according 
to high and low load periods and without variation with outdoor air 
temperature for outdoor refrigeration systems, and the test must be 
done as a matched or single-package refrigeration system, as follows:

[[Page 26503]]

[GRAPHIC] [TIFF OMITTED] TN14MY21.001

Where:

BL is the non-equipment-related box load
LF is the load factor
And other symbols are as defined in AHRI 1250-2009.

    (3) Representations. CellarPro may not make representations about 
the efficiency of a basic model listed in paragraph (1) of this Order 
for compliance, marketing, or other purposes unless the basic model has 
been tested in accordance with the provisions set forth above and such 
representations fairly disclose the results of such testing.
    (4) This waiver shall remain in effect according to the provisions 
of 10 CFR 431.401.
    (5) This Order is issued on the condition that the statements, 
representations, and information provided by CellarPro are valid. If 
CellarPro makes any modifications to the controls or configurations of 
a basic model subject to this Order, such modifications will render the 
waiver invalid with respect to that basic model, and CellarPro will 
either be required to use the current Federal test method or submit a 
new application for a test procedure waiver. DOE may rescind or modify 
this waiver at any time if it determines the factual basis underlying 
the petition for waiver is incorrect, or the results from the alternate 
test procedure are unrepresentative of a basic model's true energy 
consumption characteristics. 10 CFR 431.401(k)(1). Likewise, CellarPro 
may request that DOE rescind or modify the waiver if CellarPro 
discovers an error in the information provided to DOE as part of its 
petition, determines that the waiver is no longer needed, or for other 
appropriate reasons. 10 CFR 431.401(k)(2).
    (6) CellarPro remains obligated to fulfill any applicable 
requirements set forth at 10 CFR part 429.
    DOE makes decisions on waivers and interim waivers for only those 
basic models specifically set out in the petition, not future models 
that may be manufactured by the petitioner. CellarPro may submit a new 
or amended petition for waiver and request for grant of interim waiver, 
as appropriate, for additional basic models of Walk-in Cooler 
Refrigeration Systems. Alternatively, if appropriate, CellarPro may 
request that DOE extend the scope of a waiver or an interim waiver to 
include additional basic models employing the same technology as the 
basic model(s) set forth in the original petition consistent with 10 
CFR 431.401(g).

Signing Authority

    This document of the Department of Energy was signed on May 10, 
2021, by Kelly Speakes-Backman, Principal Deputy Assistant Secretary 
and Acting Assistant Secretary for Energy Efficiency and Renewable 
Energy, pursuant to delegated authority from the Secretary of Energy. 
That document with the original signature and date is maintained by 
DOE. For administrative purposes only, and in compliance with 
requirements of the Office of the Federal Register, the undersigned DOE 
Federal Register Liaison Officer has been authorized to sign and submit 
the document in electronic format for publication, as an official 
document of the Department of Energy. This administrative process in no 
way alters the legal effect of this document upon publication in the 
Federal Register.


[[Page 26504]]


    Signed in Washington, DC, on May 11, 2021.
Treena V. Garrett,
Federal Register Liaison Officer, U.S. Department of Energy.
[FR Doc. 2021-10246 Filed 5-13-21; 8:45 am]
BILLING CODE 6450-01-P