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Federal Register / Vol. 86, No. 127 / Wednesday, July 7, 2021 / Proposed Rules
TABLE 1 TO PARAGRAPH bTEST PROCEDURES FOR COMMERCIAL AIR CONDITIONERS AND HEAT PUMPSContinued
Equipment type
Dehumidifying Direct Expansion-Dedicated Outdoor Air Systems.

Cooling capacity or moisture removal capacity
Energy efficiency descriptor <324 lbs. of moisture removal/hr.

ISMRE2 and ISCOP2

Category
All

Use tests, conditions, and procedures 1 in
Appendix B of this subpart.

Additional test procedure provisions as indicated in the listed paragraphs of this section None.

1 Incorporated 2 Moisture
by reference; see 431.95.
removal capacity is determined according to appendix B of this subpart.

9. Add Appendix B to subpart F of part 431 to read as follows:

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Appendix B to Subpart F of Part 431
Uniform Test Method for Measuring the Energy Consumption of Dehumidifying Direct Expansion-Dedicated Outdoor Air Systems Note: Beginning date 360 days after publication of a test procedure final rule, representations with respect to energy use or efficiency of dehumidifying direct expansion-dedicated outdoor air systems must be based on testing conducted in accordance with this appendix.
Manufacturers may elect to use this appendix early.
1. Referenced materials.
1.1. Incorporation by reference.
DOE incorporated by reference in 431.95, the entire standard for AHRI 9202020, ANSI/AHRI 10602018; ANSI/ASHRAE 37
2009, ANSI/ASHRAE 41.12013, ANSI/
ASHRAE 41.62014, and ANSI/ASHRAE
1982013. However, only enumerated provisions of AHRI 9202020, ANSI/
ASHRAE 372009, ANSI/ASHRAE 41.6
2014, and ANSI/ASHRAE 1982013, as set forth in paragraphs a through d of this section are applicable. To the extent there is a conflict between the terms or provisions of a referenced industry standard and the CFR, the CFR provisions control.
a AHRI 9202020:
i Section 3Definitions, as specified in section 2.2.1a of this appendix;
ii Section 5Test Requirements, as specified in section 2.2.1b of this appendix;
iii Section 6Rating Requirements, as specified in section 2.2.1c of this appendix, omitting section 6.1.2 but retaining sections 6.1.2.16.1.2.8 and 6.6.1;
iv Section 11Symbols and Subscripts, as specified in section 2.2.1d of this appendix;
v Appendix AReferencesNormative, as specified in section 2.2.1e of this appendix;
vi Appendix CANSI/ASHRAE Standard 198 and ANSI/ASHRAE Standard 37
Additions, Clarifications and Exceptions Normative, as specified in section 2.2.1f of this appendix, and vii Appendix FUnit Configuration for Standard Efficiency Determination Normative, as specified in section 2.2.1g of this appendix.
b ANSI/ASHRAE 372009:

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i Section 5.1Temperature Measuring Instruments excluding sections 5.1.1 and 5.1.2, as specified in sections 2.2.1b and f of this appendix;
ii Section 5.2Refrigerant, Liquid, and Barometric Pressure Measuring Instruments, as specified in section 2.2.1b of this appendix;
iii Sections 5.3Air Differential Pressure and Airflow Measurements, as specified in section 2.2.1b of this appendix;
iv Sections 5.5bVolatile Refrigerant Measurement, as specified in section 2.2.1b of this appendix;
v Section 6.1Enthalpy Apparatus excluding 6.1.1 and 6.1.3 through 6.1.6, as specified in section 2.2.1b of this appendix;
vi Section 6.2Nozzle Airflow Measuring Apparatus, as specified in section 2.2.1b of this appendix;
vii Section 6.3Nozzles, as specified in section 2.2.1b of this appendix;
viii Section 6.4External Static Pressure Measurements, as specified in section 2.2.1b of this appendix;
ix Section 6.5Recommended Practices for Static Pressure Measurements, as specified in section 2.2.1f of this appendix;
x Section 7.3Indoor and Outdoor Air Enthalpy Methods, as specified in section 2.2.1f of this appendix;
xi Section 7.4Compressor Calibration Method, as specified in section 2.2.1f of this appendix;
xii Section 7.5Refrigerant Enthalpy Method, as specified in section 2.2.1f of this appendix;
xiii Section 7.6Outdoor Liquid Coil Method, as specified in section 2.2.1f of this appendix;
xiv Section 7.7Airflow Rate Measurement excluding sections 7.7.1.2, 7.7.3, and 7.7.4, as specified in section 2.2.1b of this appendix;
xv Table 1Applicable Test Methods, as specified in section 2.2.1f of this appendix;
xvi Section 8.6Additional Requirements for the Outdoor Air Enthalpy Method, as specified in section 2.2.1f of this appendix;
xvii Table 2bTest Tolerances IP
Units, as specified in sections 2.2.1c and 2.2f of this appendix; and xviii Errata sheet issued on October 3, 2016, as specified in section 2.2.1f of this appendix.
c ANSI/ASHRAE 41.62014:
i Section 4Classifications, as specified in section 2.2.1f of this appendix;

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ii Section 5Requirements, as specified in section 2.2.1f of this appendix;
iii Section 6Instruments and Calibration, as specified in section 2.2.1f of this appendix;
iv Section 7.1Standard Method Using the Cooled-Surface Condensation Hygrometer as specified in section 2.2.1f of this appendix; and v Section 7.4Electronic and Other Humidity Instruments. as specified in section 2.2.1f of this appendix.
d ANSI/ASHRAE 1982013:
i Section 4.4Temperature Measuring Instrument, as specified in section 2.2.1b of this appendix;
ii Section 4.5Electrical Instruments, as specified in section 2.2.1b of this appendix;
iii Section 4.6Liquid Flow Measurement, as specified in section 2.2.1b of this appendix;
iv Section 4.7Time and Mass Measurements, as specified in section 2.2.1b of this appendix;
v Section 6.1Test Room Requirements, as specified in section 2.2.1b of this appendix;
vi Section 6.6Unit Preparation, as specified in section 2.2.1b of this appendix;
vii Section 7.1Preparation of the Test Rooms, as specified in section 2.2.1b of this appendix;
viii Section 7.2Equipment Installation, as specified in section 2.2.1b of this appendix;
ix Section 8.2Equilibrium, as specified in section 2.2.1b of this appendix, and x Section 8.4Test Duration and Measurement Frequency, as specified in section 2.2.1b of this appendix.
1.2. Informational materials.
DOE refers to the following provision of AHRI 9202020, for informational purposes only:
a Appendix ETypical Test Unit InstallationsInformative, as specified in section 2.2.1g of this appendix.
b Reserved.
2. Test Method.
2.1. Capacity.
Moisture removal capacity in pounds per hour and supply airflow rate in standard cubic feet per minute are determined according to AHRI 9202020 incorporated by reference; see 431.95 as specified in section 2.2 of this appendix.
2.2. Efficiency.
2.2.1. Determine the ISMRE2 for all DDX
DOASes and the ISCOP2 for all heat pump
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