Federal Register / Vol. 88, No. 224 / Wednesday, November 22, 2023 / Notices 81385 

financial and progress reports that are 

cumulative over the entire award period 

and consistent with close-out 

requirements. The final reports are due 

120 days after the performance period 

ends. 

Once the grant is awarded, recipients 

will be expected to have in place data 

collection and data management 

policies, processes, and practices that 

provide assurance they are reporting 

high quality performance measure data. 

Failure to submit accurate, complete, 

and timely required reports may affect 

the recipient’s ability to secure future 

EAC funding. 

G. Federal Awarding Agency Contact 

For general questions about this 

announcement, please contact the EAC 

Office of Grants Management at 

HAVCP@eac.gov or 202–734–0639. The 

program website also provides up to 

date contact information at https://

www.eac.gov/grants/help-america-votecollege-program. 

H. Other Information 

1. Paperwork Reduction Act. In 

accordance with the Paperwork 

Reduction Act of 1995 (44 U.S.C. 

chapter 35), the information collection 

requirements associated with the 

programs, as covered in this Notice, 

have been approved by the Office of 

Management and Budget (OMB) under 

OMB Control Number 3265–0025. 

Public burden reporting for this 

collection of information is estimated to 

average 17 hours per response for 

individuals completing all parts of this 

form, including time for reviewing 

instructions, searching existing data 

sources, gathering, and maintaining the 

data needed, and completing and 

reviewing the collection of information. 

You are not required to respond to these 

questions unless this number is 

displayed. Send comments regarding 

the burden estimate or any other aspect 

of this collection of information, 

including suggestions for reducing this 

burden, U.S. Election Assistance 

Commission, 633 3rd Street NW, Suite 

200, Washington, DC 20001. 

2. Federal Funding Accountability 

and Transparency Act. All applicants, 

in accordance with 2 CFR part 25, must 

be registered in SAM and have a UEI 

number as stated in Section D.3. of this 

Notice. All recipients of federal 

financial assistance are required to 

report information about first-tier subawards and executive total 

compensation in accordance with 2 CFR 

part 170, Reporting subaward and 

executive compensation information. 

3. Issuance of Federal Awards. The 

Election Assistance Commission is not 

obligated to make any federal awards as 

a result of this announcement. 

4. EAC Terms and Conditions. All 

awards made under this Notice will be 

subject to the EAC’s General Terms and 

Conditions and the Program-Specific 

Terms and Conditions for the program 

(where applicable). These Terms and 

Conditions contain detailed, mandatory 

compliance and reporting requirements. 

5. Effects of Nondisclosure. The 

information requested is voluntary; 

however, to be a recipient of this grant 

program, disclosure of personal or 

sensitive information is required to 

receive federal benefits. 

6. Use of Material. To ensure that 

materials generated with HAVA funding 

are available to the public and readily 

accessible to recipients and nonrecipients, the EAC reserves a royaltyfree, nonexclusive, and irrevocable right 

to obtain, use, modify, reproduce, 

publish, or disseminate publications 

and materials produced under the 

award, including data, and to authorize 

others to do so (2 CFR 200.315). 

7. Uniform Guidance. All awards 

made under this Notice will be subject 

to the Uniform Administrative 

Requirements, Cost Principles, and 

Audit Requirements for Federal Awards 

(Uniform Guidance), in 2 CFR part 200. 

8. Federal Funding Accountability 

and Transparency Act. Grant recipients 

will be required to report at 

www.FSRS.gov on all subawards over 

$30,000 and may be required to report 

on executive compensation for 

recipients and subrecipients. Recipients 

must have the necessary systems in 

place to collect and report this 

information. See 2 CFR part 170 for 

more information and to determine how 

these requirements apply. 

Camden Kelliher, 

Deputy General Counsel, U.S. Election 

Assistance Commission. 

[FR Doc. 2023–25820 Filed 11–21–23; 8:45 am] 

BILLING CODE 4810–71–P 

DEPARTMENT OF ENERGY 

[Case Number 2022–004; EERE–2022–BT– 

WAV–0010] 

Energy Conservation Program: 

Decision and Order Granting a Waiver 

to Norlake, Inc., dba Refrigerated 

Solutions Group, 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. 

SUMMARY: The U.S. Department of 

Energy (‘‘DOE’’) gives notification of a 

Decision and Order (Case Number 

2022–004) that grants to Norlake, Inc., 

dba Refrigerated Solutions Group 

(‘‘RSG’’) a waiver from specified 

portions of the DOE test procedure for 

determining the energy efficiency of 

specified walk-in cooler refrigeration 

systems. Under the Decision and Order, 

RSG is required to test and rate the 

specified basic models of its equipment 

in accordance with the alternate test 

procedure set forth in the Decision and 

Order. 

DATES: The Decision and Order is 

effective on November 22, 2023. The 

Decision and Order will terminate upon 

the date on which use of the test 

procedure for walk-in coolers and walkin freezers located at title 10 of the Code 

of Federal Regulations (‘‘CFR’’), part 

431, subpart R, appendix C1 is required 

to determine compliance with energy 

conservation standards. At such time, 

RSG must use the relevant test 

procedure for this equipment for any 

testing to demonstrate compliance with 

the applicable standards, and any other 

representations of energy use. 

FOR FURTHER INFORMATION CONTACT:

Ms. Julia Hegarty, U.S. Department of 

Energy, Office of Energy Efficiency and 

Renewable Energy, Building 

Technologies Office, Mailstop EE–5B, 

1000 Independence Avenue SW, 

Washington, DC 20585–0121. Email: 

AS_Waiver_Request@ee.doe.gov. 

Mr. Matthew Schneider, U.S. 

Department of Energy, Office of the 

General Counsel, GC–33, 1000 

Independence Avenue SW, Washington, 

DC 20585–0121. Telephone: (240) 597– 

6265. Email: matthew.schneider@

hq.doe.gov. 

SUPPLEMENTARY INFORMATION: In 

accordance with 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 

RSG a waiver from the applicable test 

procedure at 10 CFR part 431, subpart 

R, appendix C for the specified basic 

models for which RSG petitioned for 

waiver and provides that RSG must test 

and rate such equipment using the 

alternate test procedure specified in the 

Decision and Order. RSG’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 


khammond on DSKJM1Z7X2PROD with NOTICES
81386 Federal Register / Vol. 88, No. 224 / Wednesday, November 22, 2023 / Notices 

1All 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), which 

reflect the last statutory amendments that impact 

Parts A and A–1 of EPCA. 

2For editorial reasons, upon codification in the 

U.S. Code, Part C was redesignated as Part A–1. 

3Appendix C is the test procedure currently 

required for walk-in refrigeration systems to 

demonstrate compliance with energy conservation 

standards. Use of appendix C1 will be required 

beginning on the compliance date of any amended 

energy conservation standards for walk-ins 

published after January 1, 2022. DOE has 

established separate test procedures for walk-in 

envelope components at 10 CFR part 431, subpart 

R, appendices A and B. Appendix A is used for 

testing the energy use of walk-in display panels, 

display doors, and non-display doors; appendix B 

is used for testing insulation R-value of non-display 

panels and non-display doors. 

4A notation in this form provides a reference for 

information that is in the docket for this test 

procedure waiver (Docket No. EERE–2022–BT– 

WAV–0010) (available at www.regulations.gov/ 

document/EERE-2022-BT-WAV-0010). This 

notation indicates that the statement preceding the 

reference is from document number 1 in the docket 

and appears at pages 1–3 of attachment 1 of that 

document. There are two attachments to document 

1 of this docket. Attachment 1 is titled ‘‘DOE 

Waiver 021722’’. Attachment 2 is titled ‘‘RSG DOE 

Single Package System Alternate Test Procedure 

021522’’. 

representations regarding the energy 

efficiency of this equipment. (42 U.S.C. 

6314(d)) 

Any manufacturer of a basic model 

employing a technology or characteristic 

for which a waiver was granted for 

another basic model and that results in 

the need for a waiver (as specified by 

DOE in a published decision and order 

in the Federal Register) must petition 

and be granted a waiver for that basic 

model. (10 CFR 431.401(j)) 

Manufacturers may also submit a 

request for interim waiver pursuant to 

the requirements of 10 CFR 431.401. 

Case #2022–004 

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 C2 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)) 

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), energy conservation standards 

(42 U.S.C. 6313), test procedures (42 

U.S.C. 6314), labeling provisions (42 

U.S.C. 6315), 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 

equipment. 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 

covered equipment 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 procedures 

for walk-in refrigeration systems are set 

forth 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’’) and appendix C1, 

Uniform Test Method for the 

Measurement of Net Capacity and 

AWEF2 of Walk-In Cooler and Walk-In 

Freezer Refrigeration Systems 

(‘‘appendix C1’’).3

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). 

In granting a waiver or interim waiver, 

DOE will not change the energy use or 

efficiency metric that the manufacturer 

must use to certify compliance with the 

applicable energy conservation standard 

and to make representations about the 

energy use or efficiency of the covered 

equipment. 10 CFR 431.401(a). DOE 

may grant the waiver subject to 

conditions, including adherence to 

alternate test procedures. 10 CFR 

431.401(f). 

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). 

II. RSG’s Petition for Waiver: 

Assertions and Determinations 

On February 17, 2022, DOE received 

from RSG a petition for waiver and 

interim waiver from the DOE test 

procedure for walk-in refrigeration 

systems set forth at 10 CFR part 431, 

subpart R, appendix C. (RSG, No. 1, 

attachment 1, at pp. 1–3 4) Pursuant to 

10 CFR 431.401(e)(i), DOE posted the 

petition on the DOE website. The 

petition did not identify any of the 

information contained therein as 

confidential business information. 

DOE’s currently applicable test 

procedure for walk-in refrigeration 

systems (i.e., appendix C) incorporates 

by reference Air-Conditioning, Heating, 

and Refrigeration Institute (‘‘AHRI’’) 

Standard 1250–2009, 2009 Standard for 

Performance Rating of Walk-In Coolers 

and Freezers (‘‘AHRI 1250–2009’’); 

AHRI Standard 420–2008, Performance 

Rating of Forced-Circulation FreeDelivery Unit Coolers for Refrigeration 

(‘‘AHRI 420–2008’’); and American 

Society of Heating, Refrigerating, and 

Air-Conditioning Engineers 

(‘‘ASHRAE’’) Standard 23.1–2010, 

Methods of Testing for Rating the 

Performance of Positive Displacement 

Refrigerant Compressors and 

Condensing Units that Operate at 

Subcritical Temperatures of the 

Refrigerant (‘‘ASHRAE 23.1–2010’’). 

AHRI 1250–2009 is the industry test 

standard for refrigeration systems for 


khammond on DSKJM1Z7X2PROD with NOTICES
Federal Register / Vol. 88, No. 224 / Wednesday, November 22, 2023 / Notices 81387 

5AHRI 1250–2009 does not explain why Method 

1 requires 25 feet of refrigeration line and Method 

2 requires 26 feet of refrigeration line during test set 

up. 

6See Waiver Decision and Orders for Air 

Innovations (86 FR 23702 (May 4, 2021)), CellarPro 

(86 FR 26496 (May 14, 2021)), Vinotheque (86 FR 

26504 (May 14, 2021)), and Vinotemp (86 FR 36732 

(Jul. 13, 2021)). 

7Subsequent to DOE’s grant of waiver to Store It 

Cold, AHRI published an updated version of AHRI 

1250 (i.e., AHRI 1250–2020) that provides testing 

provisions for single-packaged dedicated systems 

that incorporate by reference the approach used in 

ASHRAE 37 with some modification. 

8Test condition tolerance is the maximum 

allowed deviation of the average of the 

measurements of a parameter made during a test 

period as compared with its target value. The 

Continued 

walk-in coolers and freezers, including 

unit coolers and dedicated condensing 

units sold separately, as well as 

matched pairs. The procedure describes 

the method for measuring the 

refrigeration capacity and the electrical 

energy consumption for walk-in 

refrigeration systems. Using the 

refrigeration capacity and electrical 

energy consumption, AHRI 1250–2009 

provides a calculation methodology to 

compute AWEF, the applicable energyperformance metric for refrigeration 

systems. 

In its petition for waiver and interim 

waiver, RSG presented several ways in 

which the currently prescribed test 

procedure would evaluate the specified 

basic models in a manner so 

unrepresentative of their true energy 

consumption as to provide materially 

inaccurate comparative data. These 

issues are summarized below. 

First, as presented in RSG’s petition, 

the specified basic models of walk-in 

refrigeration systems are singlepackaged dedicated systems that 

contain multiple refrigeration circuits 

that operate using a single power feed. 

(RSG, No. 1, attachment 1, at p. 1) RSG 

claimed that the specified basic models 

meet the definition of a single-packaged 

dedicated system. Id. DOE defines a 

single-packaged dedicated system as ‘‘a 

single-package assembly that includes 

one or more compressors, a condenser, 

a means for forced circulation of 

refrigerated air, and elements by which 

heat is transferred from air to 

refrigerant, without any element 

external to the system imposing 

resistance to flow of the refrigerated 

air’’. See 10 CFR 431.302. As described 

by RSG, each refrigeration circuit in the 

specified basic models is made up of a 

compressor, expansion, device, 

condenser, and evaporator. (RSG, No. 1, 

attachment 1, at p. 1) The separate 

refrigeration circuits may share 

condenser fans, evaporator fans and a 

control system. Id. In its request for 

waiver and interim waiver, RSG stated 

that neither appendix C nor AHRI 1250– 

2009 provide a method for testing a 

single-packaged dedicated system with 

multiple refrigeration circuits. Id. 

Second, RSG stated that the current 

test procedure requires that the unit 

under test be set up using a 25-foot lineset. Id. Section 3.3 of appendix C 

provides the test method for matched 

systems, single-packaged dedicated 

systems, and unit coolers tested alone, 

which references AHRI 1250–2009. 

Section C5 (Methods of Testing for 

Walk-In Cooler and Freezer Systems 

that Have Matched Unit Coolers and 

Condensing Units) of AHRI 1250–2009 

references test setup requirements that 

include the addition of a line-set that 

includes either one or two mass flow 

meters. Under section C5 of AHRI 1250– 

2009, the gross refrigeration capacity 

must be determined either by the dual 

instrumentation refrigerant enthalpy 

method (section C5.1.1 of AHRI 1250– 

2009, Method 1) or by the calibrated box 

method (section C5.1.2 of AHRI 1250– 

2009, Method 2). Both methods require 

installation of a refrigerant mass flow 

meter in the system’s liquid line to 

determine the cooling capacity. Section 

C8.3 and Figure C1 of AHRI 1250–2009 

specify the setup and measurements to 

be conducted for Method 1, for which 

25-feet of additional refrigerant line is 

added to connect the condenser to the 

evaporator (unit cooler). Within this 25- 

foot line, two mass flow meters are 

incorporated, and the heat balance 

calculated from the two flow 

measurements must be within ±5 

percent. Section C9.2 and Figure C2 of 

AHRI 1250–2009 specify the setup and 

measurements for Method 2, in which 

26-feet of additional refrigerant line is 

added to connect the condenser to the 

unit cooler (as for Method 1), 

incorporating one mass flow meter. Airside gross refrigeration capacity and 

refrigerant-side gross refrigeration 

capacity are determined and must be 

equal to within ±5 percent for the test 

to be considered valid. The 25 feet and 

26 feet 5 of additional liquid line and 

suction line piping used to set up the 

test is termed a ‘‘line-set’’. In its petition 

for waiver and interim waiver, RSG 

stated that single-packaged dedicated 

systems are not intended to be remotely 

split via a line-set. (RSG, No. 1, 

attachment 1, at p. 1) 

In its request for waiver and interim 

waiver, RSG noted that DOE has issued 

test procedure waivers for singlepackaged dedicated refrigeration 

systems using air enthalpy test methods. 

(RSG, No. 1, attachment 1, at p. 2) DOE 

granted a waiver to Store It Cold for 

basic models of single-packaged 

dedicated systems on August 9, 2019. 84 

FR 39286. Store It Cold petitioned for a 

waiver after determining that the dual 

instrumentation refrigerant enthalpy 

method specified in AHRI 1250–2009 

was not providing consistent capacity 

measurements for its single-packaged 

dedicated systems. 84 FR 39286, 39287. 

The alternate test procedure associated 

with this prior waiver required that the 

specified single-packaged dedicated 

system basic models shall be tested 

using the Indoor Air Enthalpy Method 

and the Outdoor Air Enthalpy Method 

in accordance with ASHRAE 37–2009, 

Methods of Testing for Rating 

Electrically Driven Unitary AirConditioning and Heat-Pump 

Equipment (‘‘ASHRAE 37’’). 84 FR 

39286, 39292. DOE also granted waivers 

to Air Innovations, CellarPro, Vinotemp, 

and Vinotheque for walk-in refrigeration 

systems used in wine cellar 

applications, for which some of the 

basic models included in these waivers 

were single-packaged dedicated 

systems.6 The alternate test methods 

included in these waivers require the 

specified basic models to be tested in 

accordance with AHRI Standard 1250– 

2020 (2020 Standard for Performance 

Rating of Walk-In Coolers and Freezers, 

‘‘AHRI 1250–2020’’), which references 

the air enthalpy methods in ASHRAE 37 

for testing single-packaged dedicated 

systems.7 Use of air enthalpy methods 

for testing a single-packaged dedicated 

system capture the impact of thermal 

loss and the infiltration of warm air into 

the evaporator portion of these systems, 

which increases the refrigerant load on 

the system. In its petition for waiver and 

interim waiver, RSG stated that its 

laboratory is not set up to conduct air 

enthalpy testing, and that it would 

require substantial time and expense to 

set up its laboratory to conduct air 

enthalpy testing. (RSG, No. 1, 

attachment 1, at p. 2) Additionally, RSG 

explained that it contacted third-party 

labs to inquire about testing singlepackaged dedicated systems using the 

air enthalpy method, but these labs 

responded that they are not currently 

able to conduct air enthalpy testing. Id. 

Third, in its request for waiver and 

interim waiver from the DOE test 

procedure, RSG stated that the current 

tolerance requirement of 0.5 °F for the 

on-coil temperature in section C3.3.3 of 

AHRI 1250–2009 is unrealistic. Id. RSG 

stated that indoor air temperature 

tolerances impact the on-coil 

temperatures, and that the test 

procedure currently prescribes a 1 °F 

indoor air temperature test condition 

tolerance.8 Id. RSG therefore suggested 


khammond on DSKJM1Z7X2PROD with NOTICES
81388 Federal Register / Vol. 88, No. 224 / Wednesday, November 22, 2023 / Notices 

indoor air dry-bulb test condition tolerance is 

specified as 1 °F in Table 2 of AHRI 1250–2009. 

9A secondary test method’s results are used to 

ensure the capacity tolerance is met when 

compared to the capacity determined by a primary 

test method, but are not used for rating 

performance. 

10 DOE notes a typographical error in Table III.8 

of the May 2023 Final Rule. 88 FR 28780, 28827. 

In that table, the interim waiver granted to RSG was 

indicated as being addressed by amendments to 

appendix C, with compliance beginning October 31, 

2023. Id. The table should have indicated the RSG 

interim waiver as being addressed by appendix C1, 

with a compliance date corresponding to 

‘‘Compliance date of updated standards.’’ 

11 DOE notes that while the test provisions of this 

Decision and Order are identical to those presented 

in the Interim Waiver Order, the section numbering 

of the test provisions specified in this Decision and 

Order are slightly different than those sections 

specified in the Interim Waiver Order due to other 

section numbering changes made to appendix C by 

the May 2023 Final Rule. 

that the on-coil temperature tolerance 

should also be 1 °F. Id. RSG noted 

further that it can be difficult to 

repeatedly achieve an on-coil 

temperature tolerance of 0.5 °F when 

units are shut down, re-plumbed, and 

recharged for testing. Id. 

RSG also requested an interim waiver 

from the existing DOE test procedure, 

explaining that if DOE were to deny its 

application for waiver and interim 

waiver, it would experience economic 

hardship in the form of lost sales and/ 

or a significant delay in the distribution 

into commerce of the specified basic 

models. Id. 

On July 22, 2022, DOE published a 

notification announcing its receipt of 

the petition for waiver and interim 

waiver and granted RSG an interim 

waiver. 87 FR 43808 (‘‘Interim Waiver 

Order’’). In the Interim Waiver Order, 

DOE initially determined that the 

alternate test procedure—with certain 

minor modifications as discussed in the 

Interim Waiver Order—appears to allow 

for the accurate measurement of the 

energy efficiency of the specified basic 

models, while alleviating the testing 

problems cited by RSG in its attempts to 

implement the DOE test procedure for 

these basic models. Id. at 87 FR 43814. 

The alternate test procedure established 

in the Interim Waiver Order is based on 

the calibrated box method (i.e., Method 

2 of AHRI 1250–2009) with 

modifications to the refrigerant enthalpy 

test provisions of this method. Id. at 87 

FR 43813. Using the calibrated box 

method, the measured capacity includes 

the thermal loss through the evaporator 

of the single-packaged dedicated system 

under test. Id. The calibrated box 

method serves as the primary test 

method. A modified version of the 

single-packaged refrigerant enthalpy 

method is specified in the alternate test 

procedure for use as a secondary test 

method.9 Id. Under the modified 

refrigerant enthalpy method, the 

refrigerant liquid line length is reduced 

from 25 feet (as prescribed in AHRI 

1250–2009) to a maximum of 5 feet, 

allows for the capacity measurements of 

multiple refrigerant circuits, and adds a 

calculation to estimate the singlepackaged thermal loss of the unit under 

test. Id. The capacity as measured by the 

primary and secondary test methods 

must be within 6 percent of one another 

for a valid test. Id. at 87 FR 43814. 

The alternate test procedure 

established in the Interim Waiver Order 

differed from the alternate test 

procedure proposed by RSG with regard 

to the condenser air entering wet-bulb 

temperature test condition. Id. RSG 

proposed that the condenser air entering 

wet-bulb temperature test condition be 

68 °F for single-packaged dedicated 

systems that do not use evaporative 

dedicated condensing units, for which 

all or part of the equipment is located 

in the outdoor room. Id. Whereas, the 

alternate test procedure established in 

the Interim Waiver Order specifies the 

condensing air entering wet-bulb 

temperature as 65 °F, which maintains 

consistency with the requirements in 

Table 8 of AHRI 1250–2020. Id. 

In the Interim Waiver Order, DOE 

solicited comments from interested 

parties on all aspects of the petition and 

the specified alternate test procedure. 87 

FR 43808, 43809. DOE did not receive 

any comments in response to the 

Interim Waiver Order. 

On May 4, 2023, DOE published a test 

procedure final rule (‘‘May 2023 Final 

Rule’’) that established a new test 

procedure for walk-in coolers and walkin freezers at appendix C1, in addition 

to specifying minor amendments to 

appendix C. 88 FR 28780, 28810. 

Appendix C1 includes test provisions 

for multi-circuit single-package 

dedicated systems that are substantively 

the same as the methodology granted in 

the Interim Waiver Order. Use of 

appendix C1 is not required until the 

compliance date of any amended energy 

conservation standards based on the test 

procedure in appendix C1. Until such 

time, use of appendix C is required to 

demonstrate compliance with current 

standards. As discussed in the May 

2023 Final Rule, the amendments to 

appendix C did not include provisions 

for multi-circuit single-package 

dedicated systems.10 As such, for the 

basic models subject to the Interim 

Waiver Order, the need for the waiver 

from appendix C will continue until 

such time as use of appendix C1 is 

required. 

For the reasons explained here and in 

the Interim Waiver Order, absent a 

waiver the basic models identified by 

RSG in its petition cannot be tested and 

rated for energy consumption on a basis 

representative of their true energy 

consumption characteristics. Therefore, 

DOE has determined that the current 

test procedure for walk-in cooler 

refrigeration systems would evaluate the 

subject basic models in a manner so 

unrepresentative of its true energy 

consumption characteristics as to 

provide materially inaccurate 

comparative data. DOE has reviewed the 

recommended procedure suggested by 

RSG and concludes that, with minor 

modification to the condenser air 

entering wet bulb temperature as 

discussed previously, it will allow for 

the accurate measurement of the energy 

use of the equipment, while alleviating 

the testing problems associated with 

RSG’s implementation of DOE’s 

applicable walk-in test procedure for the 

specified basic models. 

Thus, DOE is requiring that RSG test 

and rate specified walk-in basic models 

according to the alternate test procedure 

specified in this Decision and Order, 

which is identical to the alternate test 

procedure specified in the Interim 

Waiver Order.11

This Decision and Order is applicable 

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. RSG 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). 

RSG 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, RSG 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 


khammond on DSKJM1Z7X2PROD with NOTICES
Federal Register / Vol. 88, No. 224 / Wednesday, November 22, 2023 / Notices 81389 

appropriate reasons. 10 CFR 

431.401(k)(2). 

III. Order 

After careful consideration of all the 

material that was submitted by RSG, in 

this matter, it is ordered that: 

(1) RSG must test and rate the 

following Norlake- and Masterbiltbranded basic models with the test 

procedure set forth in paragraph (2). 

Cooler basic models Freezer basic models 

CPB050PC–S–0 ....... CPF050PC–S–0 

CPB075PC–S–0 ....... CPF075PC–S–0 

CPB100PC–S–0 ....... CPF100PC–S–0 

CPF150PC–S–4 

CPF200PC–S–4 

(2) The alternate test procedure for the 

RSG basic models identified in 

paragraph (1) of this Order is the test 

procedure for walk-in refrigeration 

systems prescribed by DOE at 10 CFR 

part 431, subpart R, appendix C 

(‘‘appendix C’’) as amended by the May 

2023 Final Rule, except that multiplecircuit single-packaged dedicated 

systems shall use: (1) either the 

calibrated box method or an indoor air 

enthalpy test as the primary test 

method, as detailed below; (2) the 

modified refrigerant enthalpy method as 

the secondary test method, as detailed 

below; (3) the net capacity from the 

primary and secondary test methods 

must agree within ± 6 percent, as 

detailed below; and (4) reported values 

for the overall system shall be the 

summation of the gross capacities 

obtained from the modified refrigerant 

enthalpy method conducted for each 

refrigeration circuit included in the unit 

under test, as detailed below. All other 

requirements of appendix C as amended 

by the May 2023 Final Rule and DOE’s 

regulations remain applicable. 

In appendix C: 

Revise section 3.1.1 to read as follows: 

3.1.1. In Table 1 of AHRI 1250–2009, 

Instrumentation Accuracy, refrigerant 

temperature measurements shall have a 

tolerance of ±0.5 °F for unit cooler in/ 

out. Temperature measurements used to 

determine water vapor content of the air 

shall be accurate to within ±0.4 °F. All 

other temperature measurements shall 

be accurate to ±1.0 °F. 

Revise section 3.1.4 to read as follows: 

3.1.4. In Tables 2 through 14 of 

AHRI 1250–2009, the Test Condition 

Outdoor Wet Bulb Temperature 

requirement and its associated tolerance 

apply only to units with evaporative 

cooling and single-packaged dedicated 

systems. 

Insert new section 3.1.8 as follows: 

3.1.8 Tables 3, 4, 7 and 8 of AHRI 

1250–2009 shall be modified to read as 

follows: 

TABLE 3—FIXED CAPACITY MATCHED REFRIGERATOR SYSTEM, CONDENSING UNIT LOCATED INDOOR

Test description 

Unit 

cooler air 

entering 

dry-bulb, °F 

Unit 

cooler air 

entering 

relative 

humidity, 

(%) 

Condenser 

air 

entering 

dry-bulb, 

(°F) 

Condenser 

air 

entering 

wet-bulb, °F 

Compressor 

capacity Test objective 

Off Cycle Fan 

Power.

35 <50 .................... ............................... Compressor Off ......... Measure fan input wattage during compressor off cycle. 

Refrigeration 

Capacity.

35 <50 90 75 1 or 65 2 ........... Compressor On ......... Determine Net Refrigeration Capacity of Unit Cooler, 

input power, and EER at Rating Condition. 

1 Required only for evaporative Dedicated Condensing Units 

2 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. 

TABLE 4—FIXED CAPACITY MATCHED REFRIGERATOR SYSTEM, CONDENSING UNIT LOCATED OUTDOOR

Test description 

Unit 

cooler air 

entering 

dry-bulb, °F 

Unit 

cooler air 

entering 

relative 

humidity, 

(%) 

Condenser 

air 

entering 

dry-bulb, 

(°F) 

Condenser 

air 

entering 

wet-bulb, °F 

Compressor 

capacity Test objective 

Off Cycle Fan 

Power.

35 <50 .................... ............................... Compressor Off ......... Measure fan input wattage during compressor off cycle. 

Refrigeration 

Capacity A.

35 <50 95 75 1 or 68 2 ........... Compressor On ......... Determine Net Refrigeration Capacity of Unit Cooler, 

input power, and EER at Rating Condition. 

Refrigeration 

Capacity B.

35 <50 59 54 1 or 46 2 ........... Compressor On ......... Determine Net Refrigeration Capacity of Unit Cooler, and 

system input power at moderate condition. 

Refrigeration 

Capacity C.

35 <50 35 34 1 or 29 2 ........... Compressor On ......... Determine Net Refrigeration Capacity of Unit Cooler, and 

system input power at cold condition. 

1 Required only for evaporative Dedicated Condensing Units. 

2 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. 

TABLE 7—FIXED CAPACITY MATCHED FREEZER SYSTEM, CONDENSING UNIT LOCATED INDOOR

Test description 

Unit 

cooler air 

entering 

dry-bulb, °F 

Unit 

cooler air 

entering 

relative 

humidity, 

(%) 

Condenser 

air 

entering 

dry-bulb, 

(°F) 

Condenser 

air 

entering 

wet-bulb, °F 

Compressor 

capacity Test objective 

Off Cycle Fan 

Power.

¥10 <50 .................... ............................... Compressor Off ......... Measure fan input wattage during compressor off cycle. 

Refrigeration 

Capacity.

¥10 <50 90 75 1 or 65 2 ........... Compressor On ......... Determine Net Refrigeration Capacity of Unit Cooler, 

input power, and EER at Rating Condition. 

Defrost Frost 

Load.

¥10 Various 90 75 1 or 65 2 ........... System Dependent .... Test according to section C11 of AHRI 1250–2009. 

1 Required only for evaporative Dedicated Condensing Units. 


khammond on DSKJM1Z7X2PROD with NOTICES
81390 Federal Register / Vol. 88, No. 224 / Wednesday, November 22, 2023 / Notices 

2 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. 

TABLE 8—FIXED CAPACITY MATCHED FREEZER SYSTEM, CONDENSING UNIT LOCATED OUTDOOR

Test description 

Unit 

cooler air 

entering 

dry-bulb, 

°F 

Unit 

cooler air 

entering 

relative 

humidity, 

(%) 

Condenser 

air 

entering 

dry-bulb, 

(°F) 

Condenser 

air 

entering 

wet-bulb, 

°F 

Compressor 

capacity Test objective 

Off Cycle Fan 

Power.

¥10 <50 .................... ............................... Compressor Off ......... Measure fan input wattage during compressor off cycle. 

Refrigeration 

Capacity A.

¥10 <50 95 75 1 or 68 2 ........... Compressor On ......... Determine Net Refrigeration Capacity of Unit Cooler, 

input power, and EER at Rating Condition. 

Refrigeration 

Capacity B.

¥10 <50 59 54 1 or 46 2 ........... Compressor On ......... Determine Net Refrigeration Capacity of Unit Cooler, 

input power, and EER at Rating Condition. 

Refrigeration 

Capacity C.

¥10 <50 35 34 1 or 29 2 ........... Compressor On ......... Determine Net Refrigeration Capacity of Unit Cooler, 

input power, and EER at Rating Condition. 

Defrost Frost 

Load.

¥10 Various 95 75 1 or 68 2 ........... System Dependent .... Test according to section C11 of AHRI 1250–2009. 

1 Required only for evaporative Dedicated Condensing Units. 

2 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. 

Remove section 3.2.5. 

Add a new section 4, following 

section 3.5 Hot Gas Defrost 

Refrigeration Systems 

4.0 Multiple-Circuit Single-Packaged 

Dedicated Systems 

When conducting testing in 

accordance with AHRI 1250–2009 

(incorporated by reference; see 10 CFR 

431.303), the following modifications 

must be made. 

4.1 Specific Modifications: Test 

Conditions and Tolerance 

4.1.1 Replace section C3.1.2 of AHRI 

1250–2009 with the following: Air wetbulb and dry-bulb temperatures entering 

the Single-Packaged Dedicated System 

at its evaporator return and condenser 

air inlet shall be measured based on the 

airflow area at the point of 

measurement. One measuring station is 

required for each 2.0 ft2 of the first 10.0 

ft2 of airflow area and one additional 

measuring station is required for each 

4.0 ft2 of airflow area above 10.0 ft2. A 

minimum of two stations shall be used 

and the number of measuring stations 

shall be rounded up to the next whole 

number. 

4.1.2 Replace section C3.1.5 of AHRI 

1250–2009 with the following: If 

sampling tubes are used, each tube 

opening may be considered a 

temperature measuring station provided 

the openings are uniformly spaced along 

the tube, the airflow rates entering each 

port are relatively uniform (±15%) and 

the arrangement of tubes complies with 

the location requirements of section 

C3.1.2 of AHRI 1250–2009. 

Additionally, a one-time temperature 

traverse shall be made over the 

measurement surface, prior to the tests 

to assess the temperature variation and 

ensure it complies with the allowable 

deviation specified in section C3.1.4 of 

AHRI 1250–2009. (Refer to ANSI/ 

ASHRAE Standard 41.1 for more 

information and diagrams). If sampling 

tubes are not used for single-packaged 

dedicated systems that do not use 

evaporative dedicated condensing units, 

a single air wet-bulb or RH sensor may 

be used. When used, this sensor shall be 

located at the geometric center of the 

largest condenser coil face and 6–12 

inches from the condenser coil. 

4.1.3 Replace section 3.1.6 of AHRI 

1250–2009 with the following: 

Refrigerant temperatures entering and 

leaving the evaporator section of the 

Single-Packaged Dedicated System shall 

be measured by a temperature 

measuring instrument placed in a 

thermometer well and inserted into the 

refrigerant stream. These wells shall be 

filled with non-solidifying, thermal 

conducting liquid or paste to ensure the 

temperature sensing instrument is 

exposed to a representative temperature. 

The entering temperature of the 

refrigerant shall be measured within six 

pipe diameters upstream of the 

expansion device. If the refrigerant tube 

outer diameter is less than 1⁄2-inch, the 

refrigerant temperature may be 

measured using the average of two 

temperature measuring instruments 

with a minimum accuracy of ±0.5 °F 

placed on opposite sides of the 

refrigerant tube surface. In this case, the 

refrigerant tube shall be insulated with 

1-inch-thick insulation from a point 6 

inches upstream of the measurement 

location to a point 6 inches downstream 

of the measurement location. Also, the 

entering measurement location may be 

moved to a location 6 inches upstream 

of the expansion device. 

4.2 Refrigerant Properties 

Measurement 

4.2.1 Replace section C3.3.1 of AHRI 

1250–2009 with the following: With the 

equipment operating at the desired test 

conditions, the temperature and 

pressure of the refrigerant leaving the 

unit cooler, entering the expansion 

device, and entering and leaving the 

compressor shall be measured. For cases 

where the calibrated box method or 

indoor air enthalpy method is also 

conducted, data used to calculate 

capacity according to the single-package 

refrigerant enthalpy method and the 

additional method shall be collected 

over the same intervals. 

4.2.2 Replace section C3.3.3 of AHRI 

1250–2009 with the following: For 

Single-Packaged Dedicated Systems 

tested using either the calibrated box 

method or the indoor air enthalpy 

method as the primary measurement 

and the single-package refrigerant 

enthalpy method as the secondary 

method, a preliminary test for Rating 

Condition A using the primary method 

is required prior to setting up the 

refrigerant enthalpy method 

measurements. In preparation for this 

preliminary test, temperature sensors 

shall be attached to the equipment’s 

evaporator and condenser coils. The 

sensors shall be located at points that 

are not affected by vapor superheat or 

liquid subcooling. Placement near the 

midpoint of the coil, at a return bend, 

is recommended. The preliminary test 

shall be conducted with the requirement 

that the temperatures of the on-coil 

sensors be included with the regularly 

recorded data. After the preliminary test 

is completed, the refrigerant shall be 

removed from the equipment, and the 

refrigerant enthalpy measurement setup 

shall be completed. The equipment 


khammond on DSKJM1Z7X2PROD with NOTICES
Federal Register / Vol. 88, No. 224 / Wednesday, November 22, 2023 / Notices 81391 

shall be evacuated and recharged with 

refrigerant. The test shall then be 

repeated. Once steady-state operation is 

achieved, refrigerant shall be added or 

removed until, as compared to the 

average values from the preliminary 

test, the following conditions are 

achieved: (1) each on-coil temperature 

sensor indicates a reading that is within 

±1.0 °F, (2) the temperatures of the 

refrigerant entering and leaving the 

compressor are within ±4 °F, and (3) the 

refrigerant temperature entering the 

expansion device is within ±1 °F. Once 

these conditions have been achieved 

over an interval of at least ten minutes, 

refrigerant charging equipment shall be 

removed, and the remaining tests shall 

be conducted. 

4.2.3 When conducting the 

refrigerant enthalpy method for a 

Single-Packaged Dedicated System, the 

length of the added liquid line 

conducting refrigerant out of the system, 

to the flow meter, and back into the 

system shall be no more than 5 feet. No 

such modification to the suction line 

shall be made. 

4.3 Methods for Testing for Walk-In 

Cooler and Freezer Systems That Have 

Matched Unit Coolers and Condensing 

Units 

Disregard section C5 of AHRI 1250– 

2009 and instead test according to the 

following method: 

4.3.1 The Refrigeration Capacity for 

Single-Packaged Dedicated Systems 

shall be determined using either the 

Calibrated Box method or the Indoor Air 

Enthalpy method as a primary test 

method and the Single-Package 

Refrigerant Enthalpy method as the 

secondary test method. 

4.3.1.1 Single-Package Refrigerant 

Enthalpy method shall determine gross 

refrigeration capacity by measuring the 

enthalpy change and the mass flow rate 

of the refrigerant using a single set of 

measurements. 

4.3.1.2 Calibrated Box method shall 

determine net refrigeration capacity by 

measuring the heat input to the 

calibrated box, including thermal 

transfer through the calibrated box 

walls. 

4.3.2 Indoor Air Enthalpy method 

shall determine net refrigeration 

capacity of Single-Packaged Dedicated 

System and input power in accordance 

with ASHRAE 37–2009, Figure C4 of 

AHRI 1250–2020, and the following 

modifications. 

4.3.2.1 Net refrigeration capacity is 

determined by measuring airflow rate 

and the dry-bub temperature and water 

vapor content of the air that enters and 

leaves the coil. 

4.3.2.2 Air enthalpies shall be 

determined in accordance with ANSI/ 

ASHRAE 41.6. Entering air is to be 

sufficiently dry as to not produce frost 

on the evaporator coil. Therefore, only 

sensible capacity measured by dry bulb 

change shall be used to calculate 

capacity. 

4.3.3 Testing Sequence. The primary 

test method shall be used to measure the 

capacity for Rating Condition A prior to 

set-up of the Single-Package Refrigerant 

Enthalpy Measurement. After set-up of 

the Refrigerant Enthalpy method, the 

Net Capacity shall be measured using 

both the primary test method and the 

Refrigerant Enthalpy method. The Net 

Capacity measurement using the 

Refrigerant Enthalpy method shall be 

within 6 percent of the net capacity 

measurement using the primary method. 

If a capacity balance within tolerance 

is not initially achieved, take steps to 

reduce the thermal losses of the SinglePackaged Dedicated System evaporator 

compartment by sealing air gaps and 

potentially adding more external 

insulation. If using the Calibrated Box 

method as the primary method, 

achieving a capacity balance may 

require conducting the calibration with 

calibrated box insulation material at the 

same average temperature as during 

capacity measurement, or using 

multiple calibrations conducted at 

different average insulation material 

temperatures and using these data to 

construct a correlation for the 

calibration coefficient, Kcb, as a function 

of average insulation temperature. The 

official performance measurements are 

based on the primary method testing 

without any air gap sealing and 

additional external insulation used to 

achieve the 6 percent energy balance in 

place. 

4.3.4 The refrigerant enthalpy 

method Net Capacity shall be calculated 

from the Gross Capacity Measurement 

as follows. 

q ̇ ss,2 = Q ̇ ref ¥ 3.412 × E ̇ Fcomp,on¥Q ̇ sploss

Where Q ̇ sploss represents the SinglePackaged Dedicated System thermal 

losses through the walls of the 

evaporator side of the Single-Packaged 

Dedicated System to the condenser side 

and to the exterior ambient, and shall be 

calculated as follows. 

Q ̇ sploss = UAcond × (Tcondside¥Tevapside) + 

UAamb × (Tamb¥Tevapside) 

Where: 

UAcond and UAamb are, for the condenser/ 

evaporator partition and the evaporator 

compartment walls exposed to ambient 

air, respectively, the product of the 

overall heat transfer coefficient and 

surface area of the unit as manufactured, 

i.e., without external insulation that 

might have been added during the test; 

Tevapside is the air temperature in the 

evaporator compartment; 

Tcondside is the air temperature in the 

condenser compartment; and 

Tamb is the air temperature outside the SinglePackaged Dedicated System. 

The Net Capacity to be used in AWEF 

calculations shall be the net capacity 

measured using the primary method. 

4.3.5 Upon the completion of the 

Rating Condition A steady state test, an 

off-cycle evaporator fan power test shall 

be conducted to measure the evaporator 

fan power consumption during a 

compressor-off period in accordance 

with section C10 of AHRI 1250–2009. 

4.3.6 Upon the completion of the 

Rating Condition A steady state test for 

walk-in freezer systems, a mandatory 

defrost test shall be conducted to 

establish the energy input for a defrost 

cycle. 

4.3.7 Upon the completion of the 

Rating Condition A steady state test, offcycle evaporator fan power test, and 

defrost test (for walk-in freezer systems), 

the Rating Condition B and C steady 

state tests shall be conducted. Capacity 

balance as described in section C9.2 of 

AHRI 1250–2020 for Rating Condition A 

is not required for Rating Conditions B 

and C. 

4.4 Test Chamber Requirements 

Disregard section C6 of AHRI 1250– 

2009 and instead test according to the 

following method: 

4.4.1 For single-packaged dedicated 

systems, test chamber requirements 

shall be as follows: 

a. For the calibrated box method, 

follow ASHRAE 16–2016 Section 6.1 for 

calibrated type calorimeters excluding 

water and water energy inputs for the 

indoor-side compartment. 

b. For the indoor air enthalpy method, 

follow ASHRAE 37–2009. 

4.5 Single-Packaged Dedicated System 

Refrigerant Enthalpy Method 

4.5.1 General Description. In this 

method, capacity is determined from the 

refrigerant enthalpy change and flow 

rate. Enthalpy changes are determined 

from measurements of entering and 

leaving pressures and temperatures of 

the refrigerant, and the flow rate is 

determined by a suitable flow meter in 

the liquid line. This method shall not be 

used for tests in which the refrigerant 

liquid leaving the flow meter is 

subcooled less than 3 °F or for tests in 

which any instantaneous measurement 

of the superheat of the vapor leaving the 

evaporator coil is less than 5 °F. 

Supplementary cooling may be 

artificially provided for the liquid line 

to ensure enough subcooling when 


khammond on DSKJM1Z7X2PROD with NOTICES
81392 Federal Register / Vol. 88, No. 224 / Wednesday, November 22, 2023 / Notices 

making measurements to establish the 

capacity balance for Rating Condition A, 

however, no official measurements used 

to calculate AWEF may be made while 

providing such supplementary cooling. 

4.5.2 Measurements. Refer to 

Section 4.1 of this appendix and section 

C3 of AHRI 1250–2009 for requirements 

of air-side and refrigerant-side 

measurements. 

4.5.3 Test Setup and Procedure. 

Refer to Section 4.4 of this appendix, 

section C7 of AHRI 1250–2009, and 

Figure C3 of this section for specific test 

setup. The length of the added liquid 

line shall be 5 feet, maximum. 

BILLING CODE 6450–01–P 

4.5.4 Data to be Measured and 

Recorded. Refer to ‘‘Refrigerant 

Enthalpy Method’’ in Table C2 in 

section C7.2 of AHRI 1250–2009 for the 

required data that need to measured and 

recorded, except as follows. 

4.5.4.1 Water vapor content of air 

entering the unit cooler (evaporator) and 

condensing unit may be measured using 

a wet bulb temperature measurement or 

a relative humidity sensor, but both are 

not required. 

4.5.4.2 Wet bulb temperature of air 

leaving the unit cooler (evaporator) and 

condensing unit need not be measured. 

4.5.4.3 Required refrigerant pressure 

measurement includes only subcooled 

liquid entering the expansion valve and 

superheated vapor exiting the unit 

cooler (evaporator). 

4.5.4.4 Only one refrigerant mass 

flow measurement is required. 

4.5.4.5 Measurement of Refrigerant 

oil flow rate and oil/refrigerant mass 

ratio are not required. 

4.5.5 Refrigeration Capacity 

Calculation. 


khammond on DSKJM1Z7X2PROD with NOTICESEN22NO23.258</GPH>
Federal Register / Vol. 88, No. 224 / Wednesday, November 22, 2023 / Notices 81393 

4.5.5.1 The refrigerant-side gross 

capacity is calculated by 

Q ̇ ref = m ̇ ref(hout¥hin) 

4.5.5.2 Measurement of Capacity for 

a Single-Packaged Dedicated System 

with Multiple Refrigeration Circuits. 

For a Single-Packaged Dedicated 

System with multiple refrigeration 

circuits, apply the refrigerant enthalpy 

method separately for each circuit and 

sum the separately-measured gross 

refrigeration capacities. 

4.6 Calibrated Box Test Procedure 

4.6.1 Measurements. Refer to section 

4.1 of this section and section C3 of 

AHRI 1250–2009 for requirements of 

air-side and refrigerant-side 

measurements. 

4.6.2 Apparatus setup for Calibrated 

Box Calibration and Test. Refer to 

section 4.4 of this section, section C7 of 

AHRI 1250–2009, and Figure C4 of this 

section for specific test setup. 

BILLING CODE 6510–01–C 

4.6.2.1 The calibrated box shall be 

installed in a temperature-controlled 

enclosure in which the temperature can 

be maintained at a constant level. When 

using the calibrated box method for 

Single-Packaged Dedicated Systems, the 

enclosure air temperature shall be 

maintained such that the condenser air 

entering conditions are as specified for 

the test. 

4.6.2.2 The temperature-controlled 

enclosure shall be of a size that will 

provide clearances of not less than 18 in 

at all sides, top and bottom, except that 

clearance of any one surface may be 

reduced to not less than 5.5 inches. 

4.6.2.3 The heat leakage of the 

calibrated box shall be noted in the test 

report. 

4.6.2.4 Refrigerant lines within the 

calibrated box shall be well insulated to 

avoid appreciable heat loss or gain. 

4.6.2.5 Instruments for measuring 

the temperature around the outside of 

the calibrated box to represent the 

enclosure temperature Ten shall be 

located at the center of each wall, 

ceiling, and floor. 

Exception: in the case where a 

clearance around the outside of the 

calibrated box, as indicated above, is 

reduced to less than 18 inches, the 

number of temperature-measuring 

devices on the outside of that surface 

shall be increased to six, which shall be 

treated as a single temperature to be 

averaged with the temperature of each 

of the other five surfaces. There will be 

six rectangular sections of equal area, 

and each of these six sections will have 

a temperature-measuring instrument 

located at its center. If the refrigeration 

system is mounted at the location that 

would cover the center of the face on 

which it is mounted, up to four 

temperature measurements shall be 

used on that face to represent its 

temperature. Each sensor shall be 

aligned with the center of the face’s 

nearest outer edge and centered on the 

distance between that edge and the 

single-packaged unit (this is illustrated 

in Figure C5 when using surface 

temperature sensors), and they shall be 

treated as a single temperature to be 

averaged with the temperature of each 

of the other five surfaces. However, any 

of these sensors shall be omitted if 

either (a) the distance between the outer 


khammond on DSKJM1Z7X2PROD with NOTICESEN22NO23.259</GPH>
81394 Federal Register / Vol. 88, No. 224 / Wednesday, November 22, 2023 / Notices 

edge and the single-packaged unit is less 

than one foot or (b) if the sensor location 

would be within two feet of any of the 

foot-square surfaces discussed below 

representing a warm discharge air 

impingement area. In this case, the 

remaining sensors shall be used to 

represent the average temperature for 

the surface. 

One of the following two approaches 

shall be used for the box external 

temperature measurement. Box 

calibration and system capacity 

measurement shall both be done using 

the same one of these approaches. 

4.6.2.5.1 Air temperature sensors. 

Each temperature sensor shall be at a 

distance of 6 inches from the calibrated 

box. If the clearance from a surface of 

the box (allowed for one surface only) 

is less than 12 inches, the temperature 

measuring instruments shall be located 

midway between the outer wall of the 

calibrated box and the adjacent surface. 

4.6.2.5.2 Surface temperature 

sensors. Surface temperature sensors 

shall be mounted on the calibrated box 

surfaces to represent the enclosure 

temperature, Ten. 

Additional surface temperature 

sensors may be used to measure external 

hot spots during refrigeration system 

testing. If this is done, two temperature 

sensors shall be used to measure the 

average temperature of the calibrated 

box surface covered by the condensing 

section—they shall be centered on 

equal-area rectangles comprising the 

covered calibrated box surface whose 

common sides span the short dimension 

of this surface. Additional surface 

temperature sensors may be used to 

measure box surfaces on which warm 

condenser discharge air impinges. A 

pattern of square surfaces measuring 

one foot square shall be mapped out to 

represent the hot spot upon which the 

warm condenser air impinges. One 

temperature sensor shall be used to 

measure surface temperature at the 

center of each square (see Figure C5 of 

this section). A drawing showing this 

pattern and identifying the surface 

temperature sensors shall be provided 

in the test report. The average surface 

temperature of the overall calibrated box 

outer surface during testing shall be 

calculated as follows. 

Where: 

Ai is the surface area of the ith of the six 

calibrated box surfaces; 

Ti is the average temperature measured for 

the ith surface; 

Aj is half of the surface area of the calibrated 

box covered by the condensing section; 

T’j is the jth of the two temperature 

measurements underneath the 

condensing section; 

T1 is the average temperature of the four or 

fewer measurements representing the 

temperature of the face on which the 

single-packaged system is mounted, 

prior to adjustments associated with hot 

spots based on measurements Tj and/or 

Tk; 

Ak is the area of the kth of n 1-square-foot 

surfaces used to measure the condenser 

discharge impingement area hot spot; 

and, 

T’’k is the kth of the n temperature 

measurements of the condenser 

discharge impingement area hot spot. 

BILLING CODE 6450–01–P 


khammond on DSKJM1Z7X2PROD with NOTICESEN22NO23.260</GPH>
Federal Register / Vol. 88, No. 224 / Wednesday, November 22, 2023 / Notices 81395 

BILLING CODE 6450–01–C 

4.6.2.6 Heating means inside the 

calibrated box shall be shielded or 

installed in a manner to avoid radiation 

to the Single-Packaged Dedicated 

System, the temperature measuring 

instruments, and to the walls of the box. 

The heating means shall be constructed 

to avoid stratification of temperature, 

and suitable means shall be provided for 

distributing the temperature uniformly. 

4.6.2.7 The average air dry-bulb 

temperature in the calibrated box during 

Single-Packaged Dedicated System tests 

and calibrated box heat leakage tests 

shall be the average of eight 

temperatures measured at the corners of 

the box at a distance of 2 inches to 4 

inches from the walls. The instruments 

shall be shielded from any cold or warm 

surfaces except that they shall not be 

shielded from the adjacent walls of the 

box. The Single-Packaged Dedicated 

System under test shall be mounted 

such that the temperature instruments 

are not in the direct air stream from the 

discharge of the Single-Packaged 

Dedicated System. 

4.6.3 Calibration of the Calibrated 

Box. Calibration of the Calibrated Box 

shall occur prior to installation of the 

Single-Packaged Dedicated System. This 

shall be done either (a) prior to cutting 

the opening needed to install the SinglePackaged Dedicated System, or (b) with 

an insulating panel with the same 

thickness and thermal resistance as the 

box wall installed in the opening 

intended for the Single-Packaged 

Dedicated System installation. Care 

shall be taken to avoid thermal shorts in 

the location of the opening either during 

calibration or during subsequent 

installation of the Single-Packaged 

Dedicated System. A calibration test 

shall be made for air movements 

comparable to those expected for SinglePackaged Dedicated System capacity 

measurement, i.e., with air volume flow 

rate within 10 percent of the air volume 

flow rate of the Single-Packaged 

Dedicated System evaporator. 

4.6.3.1 The heat input shall be 

adjusted to maintain an average box 

temperature not less than 25.0 °F above 

the test enclosure temperature. 

4.6.3.2 The average dry-bulb 

temperature inside the calibrated box 

shall not vary more than 1.0 °F over the 

course of the calibration test. 

4.6.3.3 A calibration test shall be the 

average of eleven consecutive hourly 

readings when the box has reached a 

steady-state temperature condition. 

4.6.3.4 The box temperature shall be 

the average of all readings after a steadystate temperature condition has been 

reached. 

4.6.3.5 The calibrated box has 

reached a steady-state temperature 

condition when: 


khammond on DSKJM1Z7X2PROD with NOTICESEN22NO23.261</GPH>
81396 Federal Register / Vol. 88, No. 224 / Wednesday, November 22, 2023 / Notices 

4.6.3.5.1 The average box 

temperature is not less than 25 °F above 

the test enclosure temperature. 

4.6.3.5.2 Temperature variations do 

not exceed 5.0 °F between temperaturemeasuring stations. 

4.6.3.5.3 Temperatures do not vary 

by more than 2 °F at any one 

temperature-measuring station. 

4.6.4 Data to be Measured and 

Recorded. Refer to Table C2 in section 

C7.2 of AHRI 1250–2020 for the 

required data that need to measured and 

recorded. 

4.6.5 Refrigeration Capacity 

Calculation. 

4.6.5.1 The heat leakage coefficient 

of the calibrated box is calculated by 

4.6.5.2 For each Dry Rating 

Condition, calculate the Net Capacity: 

q ̇ ss = Kcb (Ten¥Tcb) + 3.412 x E ̇ c

(3) Representations. RSG 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 that basic model has 

been tested in accordance with the 

provisions set forth in this alternate test 

procedure and such representations 

fairly disclose the results of such 

testing. 

(4) This Order shall remain in effect 

until the date upon which use of 

appendix C1 is required to demonstrate 

compliance with any amended energy 

conservation standards based on the test 

procedure in appendix C1. 

(5) This Order is issued on the 

condition that the statements and 

representations provided by RSG are 

valid. If RSG makes any modifications 

to the controls or configurations of any 

basic model subject to this Order, such 

modifications will render the waiver 

invalid with respect to that basic model, 

and RSG 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 the waiver is incorrect, 

upon a determination that the results 

from the alternate test procedure are 

unrepresentative of a basic model’s true 

energy consumption characteristics, or 

for other appropriate reasons. 10 CFR 

431.401(k)(1). Likewise, RSG may 

request that DOE rescind or modify the 

waiver if RSG 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) Issuance of this Order does not 

release RSG from the 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. RSG 

may submit a new or amended petition 

for waiver and request for grant of 

interim waiver, as appropriate, for 

additional basic models of singlepackaged dedicated systems with 

multiple refrigeration circuits. 

Alternatively, if appropriate, RSG 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 models 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 November 17, 

2023, by Jeffrey Marootian, Principal 

Deputy Assistant Secretary for Energy 

Efficiency and Renewable, 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. 

Signed in Washington, DC, on November 

17, 2023. 

Treena V. Garrett, 

Federal Register Liaison Officer, U.S. 

Department of Energy. 

[FR Doc. 2023–25873 Filed 11–21–23; 8:45 am] 

BILLING CODE 6450–01–P 

DEPARTMENT OF ENERGY 

[Case Number 2023–004; EERE–2023–BT– 

WAV–0016] 

Energy Conservation Program: 

Notification of Petition for Waiver of 

United CoolAir Corporation From the 

Department of Energy Commercial Air 

Conditioners and Heat Pumps Test 

Procedure and Notification of Denial of 

Interim Waiver 

AGENCY: Office of Energy Efficiency and 

Renewable Energy, Department of 

Energy. 

ACTION: Notification of petition for 

waiver and denial of application for 

interim waiver; request for comments. 

SUMMARY: This notification announces 

receipt of and publishes a petition for 

waiver and interim waiver from United 

CoolAir Corporation (‘‘UCA’’), which 

seeks a waiver for specified basic 

models of double-duct air conditioners 

and heat pumps from the U.S. 

Department of Energy (‘‘DOE’’) test 

procedure used for determining the 

efficiency of double-duct air 

conditioners and heat pumps. This 

notification also announces that DOE is 

declining to grant the request for an 

interim waiver for the reasons described 

in this notification. DOE solicits 

comments, data, and information 

concerning UCA’s petition and its 

suggested alternate test procedure so as 

to inform DOE’s final decision on UCA’s 

waiver request. 

DATES: Written comments and 

information are requested and will be 

accepted on or before December 22, 

2023. 

ADDRESSES: Interested persons are 

encouraged to submit comments using 

the Federal eRulemaking Portal at 

www.regulations.gov under docket 

number EERE–2023–BT–WAV–0016. 

Follow the instructions for submitting 

comments. Alternatively, interested 

persons may submit comments, 

identified by docket number EERE– 

2023–BT–WAV–0016, by any of the 

following methods: 

(1) Email: 

UnitedCoolAirACHP2023WAV0016@

ee.doe.gov. Include the case number 

[Case No. 2023–004] in the subject line 

of the message. 

(2) Postal Mail: Appliance and 

Equipment Standards Program, U.S. 

Department of Energy, Building 

Technologies Office, Mailstop EE–5B, 

Petition for Waiver [Case No. 2023–004], 

1000 Independence Avenue SW, 

Washington, DC 20585–0121. If 

possible, please submit all items on a 

compact disc (‘‘CD’’), in which case it is 

not necessary to include printed copies. 


khammond on DSKJM1Z7X2PROD with NOTICESEN22NO23.262</GPH>