[Federal Register Volume 88, Number 205 (Wednesday, October 25, 2023)]
[Rules and Regulations]
[Pages 73215-73219]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2023-18531]



========================================================================
Rules and Regulations
                                                Federal Register
________________________________________________________________________

This section of the FEDERAL REGISTER contains regulatory documents 
having general applicability and legal effect, most of which are keyed 
to and codified in the Code of Federal Regulations, which is published 
under 50 titles pursuant to 44 U.S.C. 1510.

The Code of Federal Regulations is sold by the Superintendent of Documents. 

========================================================================


Federal Register / Vol. 88, No. 205 / Wednesday, October 25, 2023 / 
Rules and Regulations

[[Page 73215]]


-----------------------------------------------------------------------

DEPARTMENT OF ENERGY

10 CFR Parts 429 and 431

[EERE-2017-BT-TP-0010]
RIN 1904-AD78


Energy Conservation Program: Test Procedure for Walk-In Coolers 
and Walk-In Freezers; Correction

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

ACTION: Final rule; correcting amendments.

-----------------------------------------------------------------------

SUMMARY: On May 4, 2023, the U.S. Department of Energy (``DOE'') 
published a final rule adopting test procedures for walk-in coolers and 
walk-in freezers. This document corrects errors and omissions in that 
final rule. Neither the errors and omissions nor the corrections affect 
the substance of the rulemaking or any conclusions reached in support 
of the final rule.

DATES: Effective October 25, 2023.

FOR FURTHER INFORMATION CONTACT: 
    Mr. Troy Watson, 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. Telephone: 
(240) 449-9387. Email: <a href="/cdn-cgi/l/email-protection#8acbfafae6e3ebe4e9efd9feebe4eeebf8eef9dbffeff9fee3e5e4f9caefefa4eee5efa4ede5fc"><span class="__cf_email__" data-cfemail="3f7e4f4f53565e515c5a6c4b5e515b5e4d5b4c6e4a5a4c4b5650514c7f5a5a115b505a11585049">[email protected]</span></a>.
    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: 
<a href="/cdn-cgi/l/email-protection#c0ada1b4b4a8a5b7eeb3a3a8aea5a9a4a5b280a8b1eea4afa5eea7afb6"><span class="__cf_email__" data-cfemail="f39e9287879b9684dd80909b9d969a979681b39b82dd979c96dd949c85">[email protected]</span></a>.

SUPPLEMENTARY INFORMATION:

I. Background

    On May 4, 2023, DOE published a final rule (``May 2023 Final 
Rule'') amending the test procedures for walk-in coolers and freezers 
(``walk-ins'') at title 10 of the Code of Federal Regulations (``CFR'') 
part 431, subpart R, appendices A, B, C, and C1 (hereafter referred to 
as ``appendix A'', ``appendix B'', ``appendix C'', and ``appendix C1'', 
respectively). 88 FR 28780. Since publication of the May 2023 Final 
Rule, DOE has identified errors and omissions in the regulatory text 
established by that final rule. DOE is issuing this rule to correct 
certain errors and omissions in the May 2023 Final Rule, specifically 
in 10 CFR 429.70 and appendices A, B, C, and C1, and to assist 
regulated entities with compliance efforts. The corrections are 
described in the following paragraphs.
    In 10 CFR 429.70(f)(5)(vi), Table 7 of the regulatory text in the 
May 2023 Final Rule was erroneously labeled as ``Table 7 to Paragraph 
(f)(5)(iv),'' whereas it should have been labeled as ``Table 7 to 
Paragraph (f)(5)(vi)''. 88 FR 28780, 28837. This document corrects the 
typographical error.
    Section 5.2.1 of appendix A as finalized by the May 2023 Final Rule 
erroneously instructs the reader to determine standardized thermal 
transmittance per section 5.1.1 of appendix A. 88 FR 28780, 28840. 
However, there is no section 5.1.1 of appendix A; this should instead 
reference section 5.1 of appendix A. This document corrects this 
typographical error.
    In the May 2023 Final Rule preamble text, DOE states that it is 
maintaining the current requirement that testing be completed within 24 
hours of cutting a test specimen from the envelope components. 88 FR 
28780, 28800. However, this requirement was erroneously omitted from 
the regulatory text in appendix B. Section 5.3 of appendix B should 
instruct the reader that ``Testing must be completed within 24 hours of 
samples being cut for testing per section 5.2.5 of this appendix''. 
This document corrects this inadvertent omission.
    Section 5.2.5.7 of appendix B as finalized by May 2023 Final Rule 
erroneously instructs the reader ``To determine the parallelism of the 
specimen for side 2, repeat section'' while omitting which section to 
repeat. 88 FR 28780, 28845. Section 5.2.5.7 should state ``To determine 
the parallelism of the specimen for side 2, repeat section 5.2.5.6 of 
this appendix''. This document corrects this inadvertent omission.
    In the May 2023 Final Rule regulatory text, the seventh column of 
table 17 in appendix C and table 5 in appendix C1 erroneously specify 
that the compressor capacity or operating mode of the ``Off-Cycle 
Power'' test shall be ``Compressor On'' and that the compressor 
capacity or operating mode of ``Refrigeration Capacity, Ambient 
Condition A'' test shall be ``Compressor Off''. 88 FR 28780, 28846, 
28851-28852. These labels in the seventh column should be switched such 
that the ``Off-Cycle Power'' test is labeled as ``Compressor Off'' and 
the ``Refrigeration Capacity, Ambient Condition A'' test is labeled as 
``Compressor On''. This document corrects these typographical errors.
    In the May 2023 Final Rule regulatory text, the table for Test 
Operating Conditions for Medium-Temperature CO<INF>2</INF> Unit Coolers 
in appendix C is erroneously labeled as Table 17. 88 FR 28780, 28846. 
In appendix C, Table 15 and Table 16 provide modifications to Table 15 
and Table 16 included in the referenced industry standard, AHRI 1250-
2009 ``Standard for Performance Rating of Walk-in Coolers and 
Freezers.'' Because these tables do not represent table numbering 
within appendix C, subsequent tables only included in appendix C (i.e., 
Tables 17 through 19 and the final Table 1, discussed in the following 
paragraphs) should not continue with the AHRI 1250-2009 table numbering 
approach and should provide distinct table labels. To address this 
error and to avoid confusion with the table numbering referencing AHRI 
1250-2009, Table 17 as well as the references thereto should instead be 
labeled as Table C.1. This document corrects this typographical error.
    Similarly, in the May 2023 Final Rule regulatory text, the table 
for Test Operating Conditions for Low-Temperature CO<INF>2</INF> Unit 
Coolers in appendix C is erroneously labeled as Table 18. Id. This 
table as well as the references thereto should instead be labeled as 
Table C.2. This document corrects this typographical error.
    In the May 2023 Final Rule regulatory text, the table for Test 
Operating Conditions for High-Temperature Unit Coolers in appendix C is 
erroneously labeled as Table 19. Id. This table as well as the 
references thereto should

[[Page 73216]]

instead be labeled as Table C.3. This document corrects this 
typographical error.
    In the May 2023 Final Rule regulatory text, the table for Test 
Condition Tolerances and Hierarchy for Refrigerant Charging and Setting 
of Refrigerant Conditions is erroneously labeled as Table 1. 88 FR 
28780, 28847-28848. This table should instead be labeled as Table C.4. 
This document corrects this typographical error.
    In the May 2023 Final Rule regulatory text, in the first column 
from the left of table 3 to appendix C1, rows three, five, and seven 
erroneously included a table note numbered five at the end of each 
``Test description''. 88 FR 28780, 28851. There is no table note that 
corresponds to note five in this table, however. This document corrects 
this error.
    In the May 2023 Final Rule regulatory text, in the sixth column 
from the left of table 9 to appendix C1, row nine has ``Compressor 
operating mode'' erroneously specified as ``Maximum Capacity, k=2''. 88 
FR 28780, 28853. This label should instead read ``High Capacity, k=2''. 
This document corrects this error.
    In the May 2023 Final Rule regulatory text, in the sixth column 
from the left of table 13 to appendix C1, rows three, seven, and eleven 
have ``Compressor operating mode'' erroneously specified as ``Minimum 
Capacity, k=i''. 88 FR 28780, 28854. These labels should instead read 
``Intermediate Capacity, k=i''. This document corrects this error.
    In the May 2023 Final Rule regulatory text, in the sixth column of 
table 14 to appendix C1, row 2 has ``Compressor operating mode'' 
erroneously specified as ``Minimum Capacity, k=i''. Id. This label 
should instead read ``Intermediate Capacity, k=i''. This document 
corrects this error.

II. Need for Correction

    As published, the regulatory text in May 2023 Final Rule may lead 
to confusion in the execution of the DOE test procedure for walk-ins 
due to incorrect table labeling, omitted section references, and 
extraneous footnotes. Because this final rule would simply correct 
errors and omissions in the text without making substantive changes to 
test procedures adopted in the May 2023 Final Rule, the changes 
addressed in this document are technical in nature.

III. Procedural Issues and Regulatory Review

    DOE has concluded that the determinations made pursuant to the 
various procedural requirements applicable to the May 2023 Final Rule 
remain unchanged for these final rule technical corrections. These 
determinations are set forth in the May 2023 Final Rule. 88 FR 28780, 
28827-28834.
    Pursuant to the Administrative Procedure Act, 5 U.S.C. 553(b), DOE 
finds that there is good cause to not issue a separate notice to 
solicit public comment on those technical corrections contained in this 
document. Issuing a separate notice to solicit public comment would be 
impracticable, unnecessary, and contrary to the public interest. As 
explained previously, the corrections in this document do not affect 
the substance of or any of the conclusions reached in support of the 
May 2023 Final Rule. Additionally, given the May 2023 Final Rule is a 
product of an extensive administrative record with numerous 
opportunities for public comment, DOE finds additional comment on the 
technical corrections is unnecessary. Therefore, providing prior notice 
and an opportunity for public comment on correcting objective errors 
and omissions that do not change the substance of the test procedure 
serves no useful purpose.
    Further, this rule correcting errors and omissions makes non-
substantive changes to the test procedure in the May 2023 Final Rule. 
As such, this rule is not subject to the 30-day delay in effective date 
requirement of 5 U.S.C. 553(d) otherwise applicable to rules that make 
substantive changes.

List of Subjects

10 CFR Part 429

    Administrative practice and procedure, Confidential business 
information, Energy conservation, Household appliances, Imports, 
Intergovernmental relations, Reporting and recordkeeping requirements, 
Small businesses.

10 CFR Part 431

    Administrative practice and procedure, Confidential business 
information, Energy conservation test procedures, Incorporation by 
reference, and Reporting and recordkeeping requirements.

Signing Authority

    This document of the Department of Energy was signed on August 23, 
2023, by Francisco Alejandro Moreno, Acting Assistant Secretary for 
Energy Efficiency and Renewable Energy, U.S. Department of 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.

    Signed in Washington, DC, on August 23, 2023.
Treena V. Garrett,
Federal Register Liaison Officer, U.S. Department of Energy.

    For the reasons stated in the preamble, DOE corrects part 429 and 
431 of chapter II of title 10 of the Code of Federal Regulations by 
making the following correcting amendments:

PART 429--CERTIFICATION, COMPLIANCE, AND ENFORCEMENT FOR CONSUMER 
PRODUCTS AND COMMERCIAL AND INDUSTRIAL EQUIPMENT

0
1. The authority citation for part 429 continues to read as follows:

    Authority:  42 U.S.C. 6291-6317; 28 U.S.C. 2461 note.


0
2. Amend Sec.  429.70 by revising the heading for the table in 
paragraph (f)(5)(vi) to read as follows:


Sec.  429.70  Alternative methods for determining energy efficiency and 
energy use.

* * * * *
    (f) * * *
    (5) * * *
    (vi) * * *

Table 7 to Paragraph (f)(5)(vi)

* * * * *

PART 431--ENERGY EFFICIENCY PROGRAM FOR CERTAIN COMMERCIAL AND 
INDUSTRIAL EQUIPMENT

0
3. The authority citation for part 431 continues to read as follows:

    Authority: 42 U.S.C. 6291-6317; 28 U.S.C. 2461 note.


0
4. Appendix A to subpart R of part 431 is amended by revising section 
5.2.1 to read as follows:

Appendix A to Subpart R of Part 431--Uniform Test Method for the 
Measurement of Energy Consumption of the Components of Envelopes of 
Walk-In Coolers and Walk-In Freezers

* * * * *

[[Page 73217]]

5. * * *

5.2 * * *

    5.2.1 For display doors and display panels, thermal 
transmittance, U<INF>dd</INF> or U<INF>dp</INF>, respectively, shall 
be the standardized thermal transmittance, U<INF>ST</INF>, 
determined per section 5.1 of this appendix.
* * * * *

0
5. Appendix B to subpart R of part 431 is amended by revising sections 
5.2.5.7 and 5.3 to read as follows:

Appendix B to Subpart R of Part 431-- Uniform Test Method for the 
Measurement of R-Value of Insulation for Envelope Components of Walk-In 
Coolers and Walk-In Freezers

* * * * *

5. * * *

5.2 * * *

    5.2.5 * * *
    5.2.5.7 To determine the parallelism of the specimen for side 2, 
repeat section 5.2.5.6 of this appendix.
* * * * *
    5.3 K-factor Test. Determine the thermal conductivity, or K-
factor, of the 1-inch-thick specimen in accordance with the 
specified sections of ASTM C518-17. Testing must be completed within 
24 hours of the specimen being cut for testing per section 5.2.5 of 
this appendix.
* * * * *

0
6. Appendix C to subpart R of part 431 is amended by:
0
a. In section 3.1.6:
0
i. Removing the words ``table 17'' and adding in its place, the words 
``table C.1'' wherever they appear;
0
ii. Revising the newly designated table C.1;
0
iii. Removing the words ``table 18'' and adding in its place, the words 
``table C.2'' wherever they appear;
0
b. In section 3.1.7, removing the words ``table 19'' and adding in its 
place, the words ``table C.3'' wherever they appear;
0
c. In section 3.2.7.1, removing the words ``table 1'' and adding in its 
place, the words ``table C.4'' wherever they appear.
    The revision reads as follows:

Appendix C to Subpart R of Part 431--Uniform Test Method for the 
Measurement of Net Capacity and AWEF of Walk-In Cooler and Walk-In 
Freezer Refrigeration Systems

* * * * *

3. * * *

3.1. * * *

3.1.6 * * *

                                      Table C.1--Test Operating Conditions for Medium-Temperature CO2 Unit Coolers
--------------------------------------------------------------------------------------------------------------------------------------------------------
                                     Unit cooler  Unit cooler
                                         air          air      Suction dew  Liquid inlet  Liquid inlet
          Test description             entering     entering   point temp,  bubble point   subcooling,     Compressor capacity         Test objective
                                      dry-bulb,     relative      [deg]F     temperature     [deg]F
                                        [deg]F    humidity, %                  [deg]F
--------------------------------------------------------------------------------------------------------------------------------------------------------
Off-Cycle Power....................           35          <50  ...........  ............  ............  Compressor Off...........  Measure fan input
                                                                                                                                    power during
                                                                                                                                    compressor off-
                                                                                                                                    cycle.
Refrigeration Capacity, Ambient               35          <50           25            38             5  Compressor On............  Determine Net
 Condition A.                                                                                                                       Refrigeration
                                                                                                                                    Capacity of Unit
                                                                                                                                    Cooler.
--------------------------------------------------------------------------------------------------------------------------------------------------------
Notes:
\1\ Superheat shall be set as indicated in the installation instructions. If no superheat specification is given a default superheat value of 6.5 [deg]F
  shall be used.


0
7. Appendix C1 to subpart R of part 431 is amended by:
0
a. In section 3.2.1, revising table 3;
0
b. In section 3.2.2, revising table 5;
0
c. In section 3.2.3, revising table 9; and
0
d. In section 3.2.4, revising tables 13 and 14.
    The revisions read as follows:

Appendix C1 to Subpart R of Part 431--Uniform Test Method for the 
Measurement of Net Capacity and AWEF2 of Walk-In Cooler and Walk-In 
Freezer Refrigeration Systems

* * * * *

3. * * *

3.2. * * *

3.2.1. * * *

          Table 3--Test Operating Conditions for Fixed-Capacity High-Temperature Outdoor Matched-Pair or Single-Packaged Refrigeration Systems
--------------------------------------------------------------------------------------------------------------------------------------------------------
                                                       Unit cooler
                                          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
--------------------------------------------------------------------------------------------------------------------------------------------------------
Refrigeration Capacity A................           55           55           95  \3\ 75, \4\  Compressor On.................  Determine Net
                                                                                          68                                   Refrigeration Capacity of
                                                                                                                               Unit Cooler, input power,
                                                                                                                               and EER at Test
                                                                                                                               Condition.
Off-Cycle Power, Capacity A.............           55           55           95  \3\ 75, \4\  Compressor Off................  Measure total input
                                                                                          68                                   wattage during compressor
                                                                                                                               off-cycle, ( Ecu,off +
                                                                                                                               EFcomp,off) \2\.
Refrigeration Capacity B................           55           55           59  \3\ 54, \4\  Compressor On.................  Determine Net
                                                                                          46                                   Refrigeration Capacity of
                                                                                                                               Unit Cooler and system
                                                                                                                               input power at moderate
                                                                                                                               condition.
Off-Cycle Power, Capacity B.............           55           55           59  \3\ 54, \4\  Compressor Off................  Measure total input
                                                                                          46                                   wattage during compressor
                                                                                                                               off-cycle, (Ecu,off +
                                                                                                                               EFcomp,off) \2\.
Refrigeration Capacity C................           55           55           35  \3\ 34, \4\  Compressor On.................  Determine Net
                                                                                          29                                   Refrigeration Capacity of
                                                                                                                               Unit Cooler and system
                                                                                                                               input power at cold
                                                                                                                               condition.
Off-Cycle Power, Capacity C.............           55           55           35  \3\ 34, \4\  Compressor Off................  Measure total input
                                                                                          29                                   wattage during compressor
                                                                                                                               off-cycle, (Ecu,off +
                                                                                                                               EFcomp,off) \2\.
--------------------------------------------------------------------------------------------------------------------------------------------------------
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 off-cycle power as described in sections C3 and C4.2 of AHRI 1250-2020.
\3\ Required only for evaporative condensing units (e.g., incorporates a slinger ring).
\4\ 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.


[[Page 73218]]

* * * * *

3.2.2 * * *

                                     Table 5--Test Operating Conditions \1\ for Medium-Temperature CO2 Unit Coolers
--------------------------------------------------------------------------------------------------------------------------------------------------------
                                    Unit cooler  Unit cooler
                                        air          air      Suction dew   Liquid inlet      Liquid
            Test title                entering     entering      point      bubble point      inlet     Compressor operating mode      Test objective
                                     dry-bulb,     relative     temp,\3\    temperature,   subcooling,
                                       [deg]F    humidity, %     [deg]F        [deg]F         [deg]F
--------------------------------------------------------------------------------------------------------------------------------------------------------
Off-Cycle Power...................           35          <50  ...........  ..............  ...........  Compressor Off...........  Measure unit cooler
                                                                                                                                    input wattage during
                                                                                                                                    compressor off-
                                                                                                                                    cycle, EF \2\.
Refrigeration Capacity, Ambient              35          <50           25              38            5  Compressor On............  Determine Net
 Condition A.                                                                                                                       Refrigeration
                                                                                                                                    Capacity of Unit
                                                                                                                                    Cooler, q
--------------------------------------------------------------------------------------------------------------------------------------------------------
Notes:
\1\ Superheat shall be set as indicated in the installation instructions. If no superheat specification is given a default superheat value of 6.5 [deg]F
  shall be used.
\2\ Measure off-cycle power as described in sections C3 and C4.2 of AHRI 1250-2020.
\3\ Suction Dew Point shall be measured at the Unit Cooler Exit conditions.

* * * * *

3.2.3 * * *

     Table 9--Test Operating Conditions for Two-Capacity Low-Temperature Outdoor Dedicated Condensing Units
----------------------------------------------------------------------------------------------------------------
                                                                                 Condenser air
                                  Suction dew     Return gas,    Condenser air   entering wet-     Compressor
          Test title             point, [deg]F      [deg]F       entering dry-   bulb, [deg]F    operating mode
                                                                 bulb, [deg]F         \1\
----------------------------------------------------------------------------------------------------------------
Capacity, Condition A, Low                 -22               5              95              75  Low Capacity,
 Capacity.                                                                                       k=1.
Capacity, Condition A, High                -22               5              95              75  High Capacity,
 Capacity.                                                                                       k=2.
Off-Cycle, Condition A........  ..............  ..............              95              75  Compressor Off.
Capacity, Condition B, Low                 -22               5              59              54  Low Capacity,
 Capacity.                                                                                       k=1.
Capacity, Condition B, High                -22               5              59              54  High Capacity,
 Capacity.                                                                                       k=2.
Off-Cycle, Condition B........  ..............  ..............              59              54  Compressor Off.
Capacity, Condition C, Low                 -22               5              35              34  Low Capacity,
 Capacity.                                                                                       k=1.
Capacity, Condition C, High                -22               5              35              34  High Capacity,
 Capacity.                                                                                       k=2.
Off-Cycle, Condition C........  ..............  ..............              35              34  Compressor Off.
----------------------------------------------------------------------------------------------------------------
Notes:
\1\ Required only for evaporative condensing units (e.g., incorporates a slinger ring).

* * * * *

3.2.4 * * *

    Table 13--Test Operating Conditions for Variable- or Multiple-Capacity Low-Temperature Outdoor Dedicated
                                                Condensing Units
----------------------------------------------------------------------------------------------------------------
                                                                                 Condenser air
                                  Suction dew     Return gas,    Condenser air   entering wet-     Compressor
          Test title             point, [deg]F      [deg]F       entering dry-   bulb, [deg]F    operating mode
                                                                 bulb, [deg]F         \1\
----------------------------------------------------------------------------------------------------------------
Capacity, Condition A, Minimum             -22               5              95              75  Minimum
 Capacity.                                                                                       Capacity, k=1.
Capacity, Condition A,                     -22               5              95              75  Intermediate
 Intermediate Capacity.                                                                          Capacity, k=i.
Capacity, Condition A, Maximum             -22               5              95              75  Maximum
 Capacity.                                                                                       Capacity, k=2.
Off-Cycle, Condition A........  ..............  ..............              95              75  Compressor Off.
Capacity, Condition B, Minimum             -22               5              59              54  Minimum
 Capacity.                                                                                       Capacity, k=1.
Capacity, Condition B,                     -22               5              59              54  Intermediate
 Intermediate Capacity.                                                                          Capacity, k=i.
Capacity, Condition B, Maximum             -22               5              59              54  Maximum
 Capacity.                                                                                       Capacity, k=2.
Off-Cycle, Condition B........  ..............  ..............              59              54  Compressor Off.
Capacity, Condition C, Minimum             -22               5              35              34  Minimum
 Capacity.                                                                                       Capacity, k=1.
Capacity, Condition C,                     -22               5              35              34  Intermediate
 Intermediate Capacity.                                                                          Capacity, k=i.
Capacity, Condition C, Maximum             -22               5              35              34  Maximum
 Capacity.                                                                                       Capacity, k=2.

[[Page 73219]]

 
Off-Cycle, Condition C........  ..............  ..............              35              34  Compressor Off.
----------------------------------------------------------------------------------------------------------------
Notes:
\1\ Required only for evaporative condensing units (e.g., incorporates a slinger ring).


     Table 14--Test Operating Conditions for Variable- or Multiple-Capacity Low-Temperature Indoor Dedicated
                                                Condensing Units
----------------------------------------------------------------------------------------------------------------
                                                                                 Condenser air
                                  Suction dew     Return gas,    Condenser air   entering wet-     Compressor
          Test title             point, [deg]F      [deg]F       entering dry-   bulb, [deg]F    operating mode
                                                                 bulb, [deg]F         \1\
----------------------------------------------------------------------------------------------------------------
Capacity, Condition A, Minimum             -22               5              90              75  Minimum
 Capacity.                                                                                       Capacity, k=1.
Capacity, Condition A,                     -22               5              90              75  Intermediate
 Intermediate Capacity.                                                                          Capacity, k=i.
Capacity, Condition A, Maximum             -22               5              90              75  Maximum
 Capacity.                                                                                       Capacity, k=2.
Off-Cycle, Condition A........  ..............  ..............              90              75  Compressor Off.
----------------------------------------------------------------------------------------------------------------
Notes:
\1\ Required only for evaporative condensing units (e.g., incorporates a slinger ring).

* * * * *
[FR Doc. 2023-18531 Filed 10-24-23; 8:45 am]
BILLING CODE 6450-01-P


</pre><script data-cfasync="false" src="/cdn-cgi/scripts/5c5dd728/cloudflare-static/email-decode.min.js"></script></body>
</html>