Energy Conservation Program: Test Procedures for Central Air Conditioners and Heat Pumps; Correction, 68389-68395 [2021-25539]

Agencies

• DEPARTMENT OF ENERGY

[Federal Register Volume 86, Number 229 (Thursday, December 2, 2021)]
[Rules and Regulations]
[Pages 68389-68395]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2021-25539]



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Federal Register / Vol. 86, No. 229 / Thursday, December 2, 2021 / 
Rules and Regulations

[[Page 68389]]



DEPARTMENT OF ENERGY

10 CFR Parts 429 and 430

[EERE-2016-BT-TP-0029]
RIN 1904-AD71


Energy Conservation Program: Test Procedures for Central Air 
Conditioners and Heat Pumps; Correction

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

ACTION: Final rule; correcting amendments.

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

SUMMARY: On January 5, 2017, the U.S. Department of Energy (``DOE'') 
published a final rule that made two sets of amendments to the test 
procedure for central air conditioners and heat pumps (``CAC/HPs''): 
amendments to the existing test procedure required for determining 
compliance with the current energy conservation standards; and 
establishment of a new test procedure that would be the basis for 
making efficiency representations as of the compliance date for any 
amended energy conservation standards. This document corrects 
typographical errors, omissions, and incorrect cross-references in the 
Code of Federal Regulations that resulted from the January 2017 final 
rule. Neither the errors nor the corrections in this document affect 
the substance of the rulemaking or any conclusions reached in support 
of the final rule.

DATES: Effective December 2, 2021.

FOR FURTHER INFORMATION CONTACT: Ms. Catherine Rivest, 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: (202) 586-7335. Email: 
[email protected].
    Mr. Peter Cochran, U.S. Department of Energy, Office of the General 
Counsel, GC-33, 1000 Independence Avenue SW, Washington, DC 20585-0121. 
Telephone: (202) 586-9496. Email: [email protected].

SUPPLEMENTARY INFORMATION:

I. Background

    On January 5, 2017, DOE published a final rule regarding the 
Federal test procedure for central air conditioner and heat pumps. 82 
FR 1426 (``January 2017 final rule''). The January 2017 final rule 
amended the test procedure for central air conditioners and heat pumps 
at title 10 of the Code of Federal Regulations (``CFR'') part 430 
subpart B appendix M (``Appendix M'') and established a new test 
procedure at 10 CFR part 430 subpart B appendix M1 (``Appendix M1''). 
82 FR 1426. Appendix M provides for the measurement of the cooling and 
heating performance of central air conditioners and heat pumps using 
the seasonal energy efficiency ratio (``SEER'') metric and heating 
seasonal performance factor (``HSPF'') metric, respectively. Appendix 
M1 specifies a revised SEER metric (``SEER2'') and a revised HSPF 
metric (``HSPF2''). The test procedures as amended and established in 
the January 2107 final rule for central air conditioners and heat pumps 
include a number of typographical errors, omissions, and incorrect 
cross-references, which may result in confusion in executing the test 
procedures. The errors and corrections are summarized in the Table I.1.

              Table 1.1--Summary of Errors and Corrections
------------------------------------------------------------------------
                              Description of error
       CFR section(s)            and correction           Rationale
------------------------------------------------------------------------
10 CFR 429.16(a)(1).........  Corrects cross-       Cross-references did
                               references            not get updated
                               regarding             when the January
                               represented values    2017 final rule
                               related to multi-     added 10 CFR
                               split systems,        429.16(c)(3)(i).
                               multi-circuit
                               systems, and multi-
                               head mini-split
                               systems by:
                              (1) Replacing
                               ``(c)(3)(ii)'' with
                               ``(c)(3)(iii)''..
                              (2) Replacing
                               ``Additional
                               representations are
                               allowed, as
                               described in
                               paragraph (c)(3)(i)
                               of this section.''
                               with ``Additional
                               representations are
                               allowed, as
                               described in
                               paragraphs
                               (c)(3)(i) and
                               (c)(3)(ii) of this
                               section.''..
10 CFR 429.16(f)(1)(i)(B),    Removes the language  Transcription error--
 10 CFR 429.16(f)(2)(ii)(A),   ``(b)(3)(i)(C)''      cross-references
 and 10 CFR                    and ``(b)(3)(i)(B)    not properly
 429.16(f)(4)(i)(B).           and replaces with     updated.
                               ``(b)(3)(iii)'' and
                               ``(b)(3)(ii)'',
                               respectively.
Paragraph a of Section 3.6.4  Corrects the          Instructions for
 of Appendix M and Paragraph   instruction           compressor speed
 a of Section 3.6.4 of         regarding             limitations for H1N
 appendix M1.                  compressor speed      test incorrectly
                               for the H1N heating   incorporated.
                               mode test.
Paragraphs b and c of         Corrects incorrect    Reference
 Section 3.6.6 of appendix M.  references to HSPF2   inadvertently made
                               in appendix M.        to HSPF2 rather
                               HSPF2 is associated   than HSPF.
                               with appendix M1.
                               The revision
                               corrects the
                               reference to
                               ``HSPF''.
Section 4.1.3.2 and Section   Inserts missing       Inequalities
 4.1.4.2 of appendix M.        inequalities in the   inadvertently
                               titles, revising      omitted from the
                               ``Qc\k=1\(Tj)         January 2017 final
                               BL(Tj)                rule.
                               Qc\k=2\(Tj),'' to
                               read ``Qc\k=1\(Tj)
                               < BL(Tj) <
                               Qc\k=2\(Tj).''.

[[Page 68390]]

 
Sections 4.2.5.1, 4.2.5.2,    Replaces cross-       Cross-references
 and 4.2.5.3 of appendix M;    references to         inadvertently not
 Sections 4.2.5.1, 4.2.5.2,    section ``3.1.9''     updated.
 and 4.2.5.3 of appendix M1;.  with ``3.1.10''.
Section 4.2.5.1 of Appendix   Changes subscript on  Transcription error.
 M; Section 4.2.5.1 of         left side of
 appendix M1.                  equation for energy
                               E from ``hp'' to
                               ``h'' by replacing
                               ``Ehp(Tj) =
                               Qhp(Tj)'' with
                               ``Eh(Tj) =
                               Ehp(Tj)''.
Sections 4.2.5.1 of Appendix  Changes inequality    Transcription error.
 M; Section 4.2.5.1 of         for Case 2 of
 appendix M1.                  Section 4.2.5.1 to
                               reflect intent
                               consistent with
                               Sections 4.2.5.2
                               and 4.2.5.3 by
                               changing ``To(Tj) >
                               Tcc'' to ``To(Tj) <
                               Tcc''.
Section 4.2.6.c of appendix   Changes designation   Transcription error.
 M; Section 4.2.6.c of         of booster stage      Booster capacity
 Appendix M1.                  capacity to use the   denoted as k=3 in
                               correct superscript   all other locations
                               ``k=3'' by            throughout test
                               replacing             procedure.
                               ``Q;h\k=2\(5)''
                               with ``Qh\k=3\(5)''
                               where the text
                               describes what test
                               is used to obtain
                               the booster stage 5
                               [deg]F capacity.
Section 4.2.6.2 of appendix   Changes the           Incorrect
 M; Section 4.2.6.2 of         inequality in the     inequality.
 appendix M1.                  equation of the
                               title of Section
                               4.2.6.2 to be
                               consistent with the
                               text, ``Capacity Is
                               Greater Than or
                               Equal to the
                               Building Heating
                               Load.'' Replaces
                               ``<'' with ``<=''.
Section 4.2.6.3 of appendix   Changes the title to  Transcription error.
 M; Section 4.2.6.3 of         specify the correct   Booster capacity
 appendix M1.                  compressor stage      denoted as k=3 in
                               for the case,         all other locations
                               revising ``High''     throughout test
                               to ``Booster,''       procedure.
                               which is the k=3
                               compressor stage.
Section 1.2 of appendix M1..  Inserts the word      Transcription error--
                               ``minimum'' missing   missing word
                               in the definition     ``minimum.''
                               for ``minimum-speed-
                               limiting variable-
                               speed heat pump''
                               to indicate which
                               speed is higher
                               than its value for
                               operation in a 47
                               [deg]F ambient
                               temperature.
Section 3.1.4.7 of appendix   Replaces incorrect    Transcription error.
 M1.                           cross-reference to
                               Section ``3.14.6''
                               with ``3.1.4.6''.
Paragraph d to section 3.6.4  Adds explicit         Inadvertent omission
 Table 14 of appendix M1.      description of the    of footnote.
                               compressor speed to
                               be used for the H42
                               5 [deg]F full-
                               capacity heating
                               mode test,
                               consistent with the
                               intent as described
                               in the July 2016
                               SNOPR and January
                               2017 Final Rule
                               preamble
                               discussions.
Section 4.1.4.2 of appendix   Replaces the single   Transcription error.
 M1.                           instance of
                               ``EER2'' in the
                               section with
                               ``EER''.
Section 4.1.3.2 of appendix   Removes extraneous    Transcription error.
 M1.                           ``('' in the title
                               line of the section.
------------------------------------------------------------------------

    This document identifies and corrects these errors. Neither the 
errors nor the corrections in this document affect the substance of the 
rulemaking or any conclusions reached in support of the final rule.

II. Need for Correction

    As published, the regulatory text in the January 2017 final rule 
may result in confusion due to incorrect symbols in the test procedure 
equations, typographical errors, incorrect cross-references, and 
missing footnotes. The following sections provide the rationale for 
each correction. Because this final rule would correct errors in the 
text and provide additional detail without making substantive changes 
in the January 2017 final rule, the changes addressed in this document 
are technical in nature.

A. Cross-References at 10 CFR 429.16(a)(1)

    The January 2017 Final Rule added provisions for determining 
represented values for split systems in 10 CFR 429.16(c)(3)(i) but did 
not make corresponding edits to the cross-references contained within 
10 CFR 429.16(a)(1), which describes the additional representations 
that are allowed for such systems (i.e., in addition to the required 
representations). This document corrects this error by updating these 
cross-references.

B. Transcription Errors at 10 CFR 429.16(f)

    In the January 2017 Final Rule, DOE established provisions for 
represented values required by the Federal Trade Commission--among them 
the annual operating cost in cooling mode. These sections rely on the 
calculated quantities for cooling capacity and SEER in order to 
determine operating costs but contain incorrect cross-references to the 
sections where these quantities are calculated. This document corrects 
the cross-references to refer to the correct sections for represented 
values of cooling capacity and SEER as adopted by the January 2017 
Final Rule.

C. Reference to H1N Test in Section 3.6.4 of Appendix M and Appendix M1

    In the January 2017 Final rule, DOE revised the requirement 
regarding compressor speed for the H1N heating mode test to 
``allow the compressor speed used for the H1N test to be 
lower than used for the A2 test, provided that the H1N 
capacity is no lower than the A2 cooling capacity.'' 82 FR 1426, 1445. 
However, in codifying this revision in section 3.6.4 of appendix M and 
section 3.6.4 of appendix M1, DOE did not properly incorporate the 
changes. In appendix M, DOE inadvertently referred to the 
H12 capacity instead of the H1N

[[Page 68391]]

capacity when making the comparison to the A2 cooling capacity. In 
appendix M1, DOE omitted the language entirely that allowed the 
H1N compressor speed to be lower than the speed used for the 
A2 test provided that the H1N capacity is no lower than the 
A2 cooling capacity. This document corrects these errors to reflect the 
appropriate compressor speed limitations for the H1N test 
that were adopted in the January 2017 Final Rule in both appendix M and 
appendix M1.

D. Reference to HSPF in Section 3.6.6 of Appendix M

    The January 2017 Final Rule established the HSPF2 metric as 
measured per the newly created appendix M1. The HSPF2 metric is not 
defined for appendix M and does not apply in any section of that 
appendix. Rather, the applicable heating metric for appendix M is 
Heating Seasonal Performance Factor (``HSPF''). This document replaces 
two erroneous instances of HSPF2 with HSPF in paragraphs b and c of 
section 3.6.6 of appendix M.

E. Inequality Symbols in Sections 4.1.3.2 and 4.1.4.2 of Appendix M

    The January 2017 Final Rule retained testing provisions in appendix 
M to calculate the electrical power consumption of CAC/HPs when 
building load is between minimum and maximum capacity in order to 
satisfy the building cooling demand. For two-stage CAC/HPs, section 
4.1.3.2 details the case where the system operates between low (k=1) 
compressor stage and high (k=2) compressor stage in order to satisfy 
demand. For variable-speed CAC/HPs, section 4.1.4.2 details the case 
where the system operates at an intermediate compressor speed ``i'' 
that is between the low and high compressor speeds. In both cases, the 
title text for these sections reflects the intent of establishing a 
range of operation. However, in the following inequalities (which 
restate the title text), the inequality symbols were inadvertently 
omitted. This document adds the missing inequalities to reflect what 
was intended in the January 2017 Final Rule.

F. Cross-References in Sections 4.2.5.1, 4.2.5.2, and 4.2.5.3 of 
Appendix M and Appendix M1

    The January 2017 Final Rule retained provisions in sections 
4.2.5.1, 4.2.5.2, and 4.2.5.3 of appendices M and M1 for additional 
steps to calculate HSPF (or HSPF2 in the case of appendix M1) for heat 
pumps having heat comfort controllers. These sections each contain a 
case where outdoor bin temperatures are greater than the maximum supply 
temperature, TCC, and reference section 3.1.9 of the 
respective appendix for calculating TCC. However, section 
3.1.10 is the correct cross-reference for calculating TCC. 
This document corrects the cross-reference from 3.1.9 to 3.1.10 in 
accordance with the January 2017 Final Rule.

G. Symbol Subscripts in Section 4.2.5.1 of Appendix M and Appendix M1

    Section 4.2.5.1 of both appendix M and appendix M1 specify 
calculating the space heating capacity and electrical power of the heat 
pump, and to denote these capacities and electrical power by using the 
subscript ``hp'' instead of ``h''. Case 1 of section 4.2.5.1 of both 
appendices specifies determining total electrical power consumption 
Eh(Tj) as specified in section 4.2.1 of the same 
appendix, and provides an id est (``i.e.'') statement to illustrate the 
replacement of subscript ``h'' with ``hp''. Rather than state 
Eh(Tj) = Ehp(Tj) as 
intended, the subscript ``h'' was inadvertently replaced with ``hp'' on 
both sides of the equation. This document corrects the errors in these 
sections.

H. Inequality Symbol in Section 4.2.5.1 of Appendix M and Appendix M1

    In sections 4.2.5.1, 4.2.5.2, and 4.2.5.3 of both appendix M and 
appendix M1, Case 1 of each section covers instances where supply air 
temperature is greater than or equal to the comfort controller maximum 
supply temperature (i.e., To(Tj) >= 
Tcc). Case 2 covers the complimentary scenario where supply 
air temperature is less than the comfort controller maximum supply 
temperature (i.e., To(Tj) < Tcc), such 
that collectively the two Cases cover the full range of possible supply 
air temperatures in comparison to the comfort controller maximum supply 
temperature. In section 4.2.5.1 of both appendices, the ``less than'' 
symbol in Case 2 was inadvertently codified as a ``greater than'' 
symbol. This document corrects this symbol to ``less than.''.

I. Symbol Superscript in Section 4.2.6.c of Appendix M and Appendix M1

    The January 2017 Final Rule established provisions for testing of 
triple-capacity northern heat pumps, which utilize a third distinct 
stage of heating capacity--denoted as ``boost'' or ``booster''--that is 
higher than both the ``high'' and ``low'' stages. Section 4.2.6 of both 
appendix M and appendix M1 describes additional steps for HSPF 
calculation for triple-capacity northern heat pumps, referring to boost 
capacity with the superscript notation ``k=3'' in all but one instance: 
In section 4.2.6.c, the boost capacity is erroneously referred using 
the superscript notation ``k=2''. (Elsewhere in the test procedure, the 
notation ``k=2'' is used to refer to the ``high'' stage.) This document 
corrects that error by updating the superscript to ``k=3'' to be 
consistent with the intent established by the January 2017 final rule.

J. Inequality Symbol in Section 4.2.6.2 of Appendix M and Appendix M1

    The January 2017 Final rule amended provisions for HSPF calculation 
of triple-capacity northern heat pumps in section 4.2.6. The title of 
section 4.2.6.2 describes cases where the heat pump operates at high 
(k=2) compressor capacity at temperature Tj and its capacity 
is greater than or equal to the building load (i.e., building load is 
less than or equal to the compressor capacity). In the inequality 
immediately following, the building load is listed first, and a ``less 
than'' symbol ``<'' is erroneously used rather than a ``less than or 
equal to'' symbol (``<=''). This document corrects the symbol using 
``<='' to indicate a building load less than or equal to capacity, to 
be consistent with the intent of the section title as established by 
the January 2017 Final Rule.

K. Reference To Booster Capacity in Section 4.2.6.3 of Appendix M and 
Appendix M1

    As discussed in paragraph I, the January 2017 Final rule 
established provisions for HSPF calculation of triple-capacity northern 
heat pumps in section 4.2.6. Section 4.2.6.3 describes cases where the 
heat pump operates at the (k=3) compressor capacity (i.e., boost 
capacity) at temperature Tj and its capacity is greater than 
or equal to the building load. The title of this section erroneously 
refers to the (k=3) compressor capacity as ``high.'' Instead, the (k=3) 
compressor capacity should be referred to as the ``booster'' capacity 
(the ``high'' (k=2) capacity is covered by section 4.2.6.2). This 
document corrects the title of section 4.2.6.3 to be consistent with 
the intent established by the January 2017 Final Rule.

L. Missing Word ``Minimum'' in Section 1.2 of Appendix M1

    In the January 2017 Final rule, DOE proposed a definition for 
``minimum-speed-limiting variable-speed heat pump'' to refer to heat 
pumps that vary the minimum compressor speed when operating in outdoor 
temperatures that are in the range for which the minimum speed 
performance factors into the HSPF calculation (i.e., between 35 [deg]F 
and 62 [deg]F). 82 FR 1426, 1458. However,

[[Page 68392]]

in codifying this definition in section 1.2 of appendix M1, DOE 
inadvertently omitted the word ``minimum'' when referring to compressor 
speed at 47 [deg]F. This document adds the word ``minimum'' to the 
definition of minimum-speed-limiting variable-speed heat pump to 
reflect the intent established by the January 2017 Final Rule.

M. Cross-Reference in Section 3.1.4.7 of Appendix M1

    The January 2017 Final Rule established provisions in section 
3.1.4.7 of appendix M1 for determining the heating nominal air volume 
rate to be used in HSPF2 testing. This section omitted a period and 
erroneously cross-references section 3.14.6 for adjusting airflow--
section 3.1.4.6 is the proper cross-reference. This document corrects 
these errors.

N. Missing Footnote in Table 14 of Appendix M1

    Compressor speeds for variable-speed compressor systems are 
specified in Table 14 in section 3.6.4 of appendices M and M1. These 
sections are supposed to include footnotes that specify the ``Heating 
Full'' compressor speed at different outdoor temperature test 
conditions for systems containing a variable-speed compressor. However, 
at the optional H42 heating test condition (5 [deg]F outdoor 
temperature) in appendix M1, the footnote is missing. (There is no 
H42 test condition for variable-speed heat pumps in appendix 
M so no footnote is required.) For all other test conditions that 
utilize a ``full'' compressor speed, Table 14 to appendix M1 includes 
footnotes describing the meaning of ``full'' compressor speed in the 
context of each test condition. To specify the H42 
compressor speed for variable-speed heat pumps, a footnote is being 
added to Table 14 in appendix M1 to specify that the ``Heating Full'' 
speed refers to the maximum speed that the system's controls would 
operate the compressor in normal operation at 5 [deg]F ambient 
temperature.
    This correction is consistent with the discussion provided in the 
August 24, 2016 supplemental notice of proposed rulemaking (``SNOPR''), 
in which DOE stated that the full-speed compressor operation for 
variable-speed heat pumps could be very different at 5 [deg]F than it 
is at 17 [deg]F, thus an extrapolation of performance below 5 [deg]F 
using the [17 [deg]F compressor speed] trend between 17 [deg]F and 5 
[deg]F is not appropriate. 81 FR 58164, 58193 (``August 2016 SNOPR''). 
The regulatory text in the August 2016 SNOPR provided instructional 
footnotes as to the appropriate ``Heating Full'' compressor speed for 
the heating test conditions except for the optional H42 
heating test condition. 82 FR 58164, 58238. Comment was not received on 
the appropriate compressor speed at the 5 [deg]F condition, and the 
erroneous omission of the footnote was carried over into the final 
rule, which adopted the proposal in the August 2016 SNOPR. 82 FR 1426, 
1459, 1560. This correction also aligns with current industry test 
procedures for CAC/HPs (AHRI 210/240 2023) which includes a footnote in 
the test conditions table for variable-speed heat pumps specifying that 
the full compressor speed to be used at the 5 [deg]F heating test 
condition is the maximum speed the system controls would operate the 
compressor at 5 [deg]F ambient temperature.

O. Reference to EER in Section 4.1.4.2 of Appendix M1

    Section 4.1.4.2 of appendix M1 specifies several equations in which 
variations of the EER metric are used. One of these equations contains 
the term EER\k=2\. In the ``where'' statement following the equation, 
which defines each symbol used in the equation, EER\k=2\ is erroneously 
referred to as EER2\k=2\. This document corrects this error by 
referring instead to EER\k=2\.

P. Extraneous Symbols in Section 4.1.3.2 of Appendix M1

    The title of section 4.1.3.2 of appendix M1 contains extraneous 
``('' symbols preceding the terms BL(Tj) and 
Qc\k=2\(Tj). This document removes these 
extraneous symbols, consistent with the analogous terms in section 
4.1.3.2 of appendix M.

III. Procedural Issues and Regulatory Review

    Pursuant to the Administrative Procedure Act, 5 U.S.C. 553(b), DOE 
has determined there is good cause to find that prior notice and 
opportunity for public comment on the changes contained in this 
document are impracticable, unnecessary, or contrary to the public 
interest. Neither the errors nor the corrections in this document 
affect the substance of the January 2017 Final Rule or any of the 
conclusions reached in support of the final rule. Providing prior 
notice and an opportunity for public comment on correcting objective, 
typographical errors and omissions that do not change the substance of 
the test procedure serves no useful purpose. As such, this rule is 
similarly 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.
    DOE has also concluded that the determinations made pursuant to the 
various regulatory review requirements applicable to the January 2017 
final rule remain unchanged for this final rule technical correction. 
These determinations are set forth in the January 2017 final rule. 84 
FR 1426, 1463-1468.

List of Subjects

10 CFR Part 429

    Administrative practice and procedure, Confidential business 
information, Energy conservation, Household appliances, Reporting and 
recordkeeping requirements.

10 CFR Part 430

    Administrative practice and procedure, Confidential business 
information, Energy conservation, Household appliances, Imports, 
Incorporation by reference, Intergovernmental relations, Small 
businesses.

Signing Authority

    This document of the Department of Energy was signed on November 
17, 2021, by Kelly Speakes-Backman, Principal Deputy Assistant 
Secretary for Energy Efficiency and Renewable Energy, pursuant to 
delegated authority from the Secretary of Energy. That document with 
the original signature and date is maintained by DOE. For 
administrative purposes only, and in compliance with requirements of 
the Office of the Federal Register, the undersigned DOE Federal 
Register Liaison Officer has been authorized to sign and submit the 
document in electronic format for publication, as an official document 
of the Department of Energy. This administrative process in no way 
alters the legal effect of this document upon publication in the 
Federal Register.

    Signed in Washington, DC, on November 18, 2021.
Treena V. Garrett,
Federal Register Liaison Officer, U.S. Department of Energy.

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

[[Page 68393]]

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. Section 429.16 is amended:
0
a. By revising the table in paragraph (a)(1);
0
b. In paragraph (f)(1)(i)(B) by removing ``(b)(3)(i)(C)'' and 
``(b)(3)(i)(B)'' and adding in their place ``(b)(3)(iii)'' and 
``(b)(3)(ii)'', respectively;
0
c. In paragraph (f)(2)(ii)(A) by removing ``(b)(3)(i)(C)'' and 
``(b)(3)(i)(B)'' and adding in their place ``(b)(3)(iii)'' and 
``(b)(3)(ii)'', respectively;
0
d. In paragraph (f)(4)(i)(B) by removing ``(b)(3)(i)(C)'' and 
``(b)(3)(i)(B)'' and adding in their place ``(b)(3)(iii)'' and 
``(b)(3)(ii)'', respectively.
    The revision reads as follows:


Sec.  429.16  Central air conditioners and central air conditioning 
heat pumps

    (a) * * *
    (1) * * *

                       Table 1 to Paragraph (a)(1)
------------------------------------------------------------------------
                                    Equipment       Required represented
          Category                 subcategory             values
------------------------------------------------------------------------
Single-Package Unit.........  Single-Package AC     Every individual
                               (including Space-     model distributed
                               Constrained).         in commerce.
                              Single-Package HP
                               (including Space-
                               Constrained).
Outdoor Unit and Indoor Unit  Single-Split-System   Every individual
 (Distributed in Commerce by   AC with Single-       combination
 OUM).                         Stage or Two-Stage    distributed in
                               Compressor            commerce must be
                               (including Space-     rated as a coil-
                               Constrained and       only combination.
                               Small-Duct, High      For each model of
                               Velocity Systems      outdoor unit, this
                               (SDHV)).              must include at
                                                     least one coil-only
                                                     value that is
                                                     representative of
                                                     the least efficient
                                                     combination
                                                     distributed in
                                                     commerce with that
                                                     particular model of
                                                     outdoor unit.
                                                     Additional blower-
                                                     coil
                                                     representations are
                                                     allowed for any
                                                     applicable
                                                     individual
                                                     combinations, if
                                                     distributed in
                                                     commerce.
                              Single-Split-System   Every individual
                               AC with Other Than    combination
                               Single-Stage or Two-  distributed in
                               Stage Compressor      commerce, including
                               (including Space-     all coil-only and
                               Constrained and       blower coil
                               SDHV).                combinations.
                              Single-Split-System   Every individual
                               HP (including Space-  combination
                               Constrained and       distributed in
                               SDHV).                commerce.
                              Multi-Split, Multi-   For each model of
                               Circuit, or Multi-    outdoor unit, at a
                               Head Mini-Split       minimum, a non-
                               Split System--non-    ducted ``tested
                               SDHV (including       combination.'' For
                               Space-Constrained).   any model of
                                                     outdoor unit also
                                                     sold with models of
                                                     ducted indoor
                                                     units, a ducted
                                                     ``tested
                                                     combination.'' When
                                                     determining
                                                     represented values
                                                     on or after January
                                                     1, 2023, the ducted
                                                     ``tested
                                                     combination'' must
                                                     comprise the
                                                     highest static
                                                     variety of ducted
                                                     indoor unit
                                                     distributed in
                                                     commerce (i.e.,
                                                     conventional, mid-
                                                     static, or low-
                                                     static). Additional
                                                     representations are
                                                     allowed, as
                                                     described in
                                                     paragraphs
                                                     (c)(3)(i) and
                                                     (c)(3)(ii) of this
                                                     section,
                                                     respectively.
                              Multi-Split, Multi-   For each model of
                               Circuit, or Multi-    outdoor unit, an
                               Head Mini-Split       SDHV ``tested
                               Split System--SDHV.   combination.''
                                                     Additional
                                                     representations are
                                                     allowed, as
                                                     described in
                                                     paragraph
                                                     (c)(3)(iii) of this
                                                     section.
Indoor Unit Only Distributed  Single-Split-System   Every individual
 in Commerce by ICM).          Air Conditioner       combination
                               (including Space-     distributed in
                               Constrained and       commerce.
                               SDHV).
                              Single-Split-System
                               Heat Pump
                               (including Space-
                               Constrained and
                               SDHV).
                              Multi-Split, Multi-   For a model of
                               Circuit, or Multi-    indoor unit within
                               Head Mini-Split       each basic model,
                               Split System--SDHV.   an SDHV ``tested
                                                     combination.''
                                                     Additional
                                                     representations are
                                                     allowed, as
                                                     described in
                                                     section (c)(3)(iii)
                                                     of this section.
---------------------------------------------------
Outdoor Unit with no Match........................  Every model of
                                                     outdoor unit
                                                     distributed in
                                                     commerce (tested
                                                     with a model of
                                                     coil-only indoor
                                                     unit as specified
                                                     in paragraph
                                                     (b)(2)(i) of this
                                                     section).
------------------------------------------------------------------------

* * * * *

PART 430--ENERGY CONSERVATION PROGRAM FOR CONSUMER PRODUCTS

0
3. The authority citation for part 430 continues to read as follows:

    Authority: 42 U.S.C. 6291-6309; 28 U.S.C. 2461 note.

0
4. Appendix M to subpart B of part 430 is amended:
0
a. In paragraph a. of section 3.6.4, by revising the fifth sentence;
0
b. In the last sentence of paragraph b., section 3.6.6, by removing 
``HSPF2'' and adding in its place ``HSPF'';
0
c. In paragraph c., section 3.6.6, footnote 5, Table 15, by removing 
``HSPF2'' and adding in its place ``HSPF'';
0
d. By revising the heading for section 4.1.3.2;
0
e. By revising the heading for section 4.1.4.2;
0
f. In section 4.2.5.1, in the ``Case 1'' paragraph, by removing 
``3.1.9'', ``Ehp(Tj) = 
Ehp(Tj)'' and adding in its place, ``3.1.10'', 
``Eh(Tj) = Ehp(Tj)'', and 
in the ``Case 2'' paragraph, by removing ``where 
To(Tj) >TCC,'' and adding in its place 
``where To(Tj) < TCC,'', respectively;
0
g. In section 4.2.5.2, in the ``Case 1'' paragraph, by removing 
``3.1.9'' and adding in its place ``3.1.10'' and in the ``Case 2'' 
paragraph, by removing ``For outdoor bin temperatures where 
To(Tj) TCC, determine Qh(Tj) and 
Eh(Tj) using'' and adding in its place '' For outdoor bin 
temperatures where To(Tj) < TCC, determine 
Qh(Tj) and Eh(Tj) using'';

[[Page 68394]]

0
h. In section 4.2.5.3, by removing ``3.1.9'' and adding in its place 
``3.1.10'' and in the ``Case 2'' paragraph, by removing ``For outdoor 
bin temperatures where To\k=1\(Tj) 
TCC, determine Qh\k=1\(Tj) and 
Eh\k=1\(Tj) using'' and adding in its place ``For 
outdoor bin temperatures where To\k=1\(Tj) < 
TCC, determine Qh\k=1\(Tj) and 
Eh\k=1\(Tj) using'';
0
i. In paragraph c. of section 4.2.6, by removing 
``Qh\k=2\(5)'' and adding in its place 
``Qh\k=3\(5)'';
0
j. In section 4.2.6.2, in the heading, by removing ``BL(Tj) 
h\k=2\(Tj)'' and adding in its place ``BL(Tj) <= 
Qh\k=2\(Tj)''; and
0
k. By revising the heading for section 4.2.6.3.
    The revisions read as follows:

Appendix M to Subpart B of Part 430--Uniform Test Method for Measuring 
the Energy Consumption of Central Air Conditioners and Heat Pumps

* * * * *
    3. * * *
    3.6 * * *
    3.6.4 * * *
    a. * * * For a cooling/heating heat pump, the compressor shall 
operate for the H1N test at a speed, measured by RPM or 
power input frequency (Hz), no lower than the speed used in the A2 
test if the tested H1N heating capacity is less than the 
tested A2 cooling capacity. * * *
* * * * *
    4. * * *
    4.1.3 * * *
    4.1.3.2 Unit Alternates Between High (k=2) and Low (k=1) 
Compressor Capacity to Satisfy the Building Cooling Load at 
Temperature Tj, Qc\k=1\(Tj) j) 
c\k=2\(Tj)
* * * * *
    4.1.4.2 Unit Operates at an Intermediate Compressor Speed (k=i) 
In Order To Match the Building Cooling Load at Temperature 
Qc\k=1\(Tj) < BL(Tj) < 
Qc\k=2\(Tj)
* * * * *
    4.2 * * *
    4.2.6 * * *
    4.2.6.3 Heat Pump Only Operates at Booster (k=3) Compressor 
Capacity at Temperature Tj, and its Capacity Is Greater 
Than or Equal to the Building Heating Load, BL(Tj) <= 
Qh\k=3\(Tj).
* * * * *

0
5. Appendix M1 to subpart B of part 430 is amended:
0
a. In section 1.2, by revising the definition of ``Minimum-speed-
limiting variable-speed heat pump'';
0
b. In section 3.1.4.7, by removing ``3.14.6'' and adding in its place 
``3.1.4.6'';
0
c. By revising paragraph a. of section 3.6.4;
0
d. In paragraph d., section 3.6.4, by revising Table 14;
0
e. In section 4.1.3.2, in the heading, by removing ``Tj, 
Qc\k=1\(Tj) < (BL(Tj) < 
(Qck=2(Tj)'', and adding in its place 
``Tj, Qc\k=1\(Tj) < BL(Tj) 
< Qck=2(Tj)'';
0
f. In section 4.1.4.2, by removing ``EER2\k=2\(Tj)'' and 
adding in its place ``EER\k=2\(Tj)'';
0
g. In section 4.2.5.1, in the ``Case 1'' paragraph by removing 
``3.1.9'' and adding in its place ``3.1.10'' and removing 
``Ehp(Tj) = Ehp(Tj)'' and 
adding in its place ``Eh(Tj) = 
Ehp(Tj)'', and in the ``Case 2'' paragraph by 
removing ``To(Tj) >TCC,'' and adding 
in its place '' To(Tj) CC,'';
0
h. In section 4.2.5.2, in the ``Case 1'' paragraph, by removing 
``3.1.9'' and adding in its place ``3.1.10'';
0
i. In section 4.2.5.3, in the ``Case 1'' paragraph, by removing 
``3.1.9'' and adding in its place ``3.1.10'' and in the ``Case 2'' 
paragraph by removing ``For outdoor bin temperatures where 
To\k=1\(Tj) TCC, determine 
Qh\k=1\(Tj) and Eh\k=1\(Tj) using'' and adding in 
its place and ``For outdoor bin temperatures where 
To\k=1\(Tj) < TCC, determine 
Qh\k=1\(Tj) and Eh\k=1\(Tj) using'';
0
j. In paragraph c. of section 4.2.6, by removing ``Qh\k=2\(5)'' and 
adding in its place ``Qh\k=3\(5)'';
0
k. In section 4.2.6.2, in the heading, by removing ``BL(Tj) < 
Qh\k=2\(Tj)'' and adding in its place ``BL(Tj) <= 
Qh\k=2\(Tj)''; and
0
l. In section 4.2.6.3, in the heading, by removing ``Heat Pump Only 
Operates at High (k=3)'' and adding in its place ``Heat Pump Only 
Operates at Booster (k=3)''.
    The revisions read as follows:

Appendix M1 to Subpart B of Part 430--Uniform Test Method for Measuring 
the Energy Consumption of Central Air Conditioners and Heat Pumps

* * * * *
    1. * * *
    1.2 * * *
    Minimum-speed-limiting variable-speed heat pump means a heat 
pump for which the compressor minimum speed (represented by 
revolutions per minute or motor power input frequency) is higher 
than its minimum value for operation in a 47 [deg]F ambient 
temperature for any bin temperature Tj for which the 
calculated heating load is less than the calculated intermediate-
speed capacity.
* * * * *
    3. * * *
    3.6 * * *
    3.6.4 Tests for a Heat Pump Having a Variable-Speed Compressor
    a. Conduct one maximum temperature test (H01), two 
high temperature tests (H1N and H11), one 
frost accumulation test (H2V), and one low temperature 
test (H32). Conducting one or more of the following tests 
is optional: An additional high temperature test (H12), 
an additional frost accumulation test (H22), and a very 
low temperature test (H42). Conduct the optional high 
temperature cyclic (H1C1) test to determine the heating 
mode cyclic-degradation coefficient, CD\h\. If this 
optional test is conducted but yields a tested CD\h\ that 
exceeds the default CD\h\ or if the optional test is not 
conducted, assign CD\h\ the default value of 0.25. Test 
conditions for the nine tests are specified in Table 14. The 
compressor shall operate at the same heating full speed, measured by 
RPM or power input frequency (Hz), as the maximum speed at which the 
system controls would operate the compressor in normal operation in 
17 [deg]F ambient temperature, for the H12, 
H22 and H32 Tests. The compressor shall 
operate for the H1N test at the maximum speed at which 
the system controls would operate the compressor in normal operation 
in 47 [deg]F ambient temperature. Additionally, for a cooling/
heating heat pump, the compressor shall operate for the 
H1N test at a speed, measured by RPM or power input 
frequency (Hz), no lower than the speed used in the A2 test if the 
tested H1N heating capacity is less than the tested A2 
cooling capacity.
* * * * *
    d. * * *

                                   Table 14--Heating Mode Test Conditions for Units Having a Variable-Speed Compressor
--------------------------------------------------------------------------------------------------------------------------------------------------------
                                    Air entering indoor unit          Air entering outdoor unit
                                     temperature  ([deg]F)              temperature  ([deg]F)
       Test description       ---------------------------------------------------------------------- Compressor speed       Heating air volume rate
                                  Dry bulb          Wet bulb         Dry bulb          Wet bulb
--------------------------------------------------------------------------------------------------------------------------------------------------------
H01 test (required, steady)..              70  60\(max)\........              62  56.5.............  Heating Minimum.  Heating Minimum.\1\
H12 test (optional, steady)..              70  60\(max)\........              47  43...............  Heating Full \4\  Heating Full-Load.\3\
H11 test (required, steady)..              70  60\(max)\........              47  43...............  Heating Minimum.  Heating Minimum.\1\

[[Page 68395]]

 
H1N test (required, steady)..              70  60\(max)\........              47  43...............  Heating Full \5\  Heating Full-Load.\3\
H1C1 test (optional, cyclic).              70  60\(max)\........              47  43...............  Heating Minimum.  (\2\).
H22 test (optional)..........              70  60\(max)\........              35  33...............  Heating Full \4\  Heating Full-Load.\3\
H2V test (required)..........              70  60\(max)\........              35  33...............  Heating           Heating Intermediate.\6\
                                                                                                      Intermediate.
H32 test (required, steady)..              70  60\(max)\........              17  15...............  Heating Full \4\  Heating Full-Load.\3\
H42 test (optional, steady)..              70  60\(max)\........               5  3\(max)\.........  Heating Full \7\  Heating Full-Load.\3\
--------------------------------------------------------------------------------------------------------------------------------------------------------
\1\ Defined in section 3.1.4.5 of this appendix.
\2\ Maintain the airflow nozzle(s) static pressure difference or velocity pressure during an ON period at the same pressure or velocity as measured
  during the H11 test.
\3\ Defined in section 3.1.4.4 of this appendix.
\4\ Maximum speed that the system controls would operate the compressor in normal operation in 17 [deg]F ambient temperature. The H12 test is not needed
  if the H1N test uses this same compressor speed.
\5\ Maximum speed that the system controls would operate the compressor in normal operation in 47 [deg]F ambient temperature.
\6\ Defined in section 3.1.4.6 of this appendix.
\7\ Maximum speed that the system controls would operate the compressor in normal operation at 5 [deg]F ambient temperature.

* * * * *
[FR Doc. 2021-25539 Filed 12-1-21; 8:45 am]
BILLING CODE 6450-01-P