Appendix C1 to Subpart F of Part 431—Uniform Test Method for Measuring the Energy Consumption of Water-Source Heat Pumps

Prior to the compliance date of amended standards for water-source heat pumps that rely on integrated energy efficiency ratio (IEER) and applied coefficient of performance (ACOP) published after January 1, 2023, representations with respect to the energy use or energy efficiency of water-source heat pumps, including compliance certifications, must be based on testing according to appendix C of this subpart. Starting on November 29, 2024, voluntary representations with respect to the IEER and ACOP of water-source heat pumps must be based on testing according to this appendix. Manufacturers may also use this appendix to make voluntary representations with respect to IEER and ACOP prior to November 29, 2024. Starting on the compliance date for any amended energy conservation standards for water-source heat pumps based on IEER and ACOP, any representations, including compliance certifications, made with respect to the energy use or energy efficiency of water-source heat pumps must be based on testing according to this appendix. Manufacturers may also certify compliance with any amended energy conservation standards for water-source heat pumps based on IEER and ACOP prior to the applicable compliance date for those standards, and those compliance certifications must be based on testing according to this appendix. DOE incorporated by reference in § 431.95 the entire standards for AHRI 600-2023, ANSI/ASHRAE 37-2009 (as corrected by the Errata sheet for ANSI/ASHRAE 37-2009), and Melinder 2010. However, certain enumerated provisions of AHRI 600-2023 and ASHRAE 37-2009, as listed in this section 1, are inapplicable. 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) Section 1 Purpose is inapplicable, (b) Section 2 Scope is inapplicable, (c) The following subsections of section 3 Definitions are inapplicable: (1) 3.2.1 (Air Economizer), (2) 3.2.3 (Barometric Relief Dampers), (3) 3.2.4 (Basic Model), (4) 3.2.5 (Coated Coils), (5) 3.2.6 (Coefficients of Performance), (6) 3.2.9 (Condenser Pump/Valves/Fittings), (7) 3.2.10 (Condenser Water Reheat), (8) 3.2.13 (Desiccant Dehumidification Components), (9) 3.2.14 (Desuperheater), (10) 3.2.15.1 (Energy Efficiency Ratio), (11) 3.2.16 (Evaporative Cooling of Ventilation Air), (12) 3.2.17 (Fire/Smoke/Isolation Dampers), (13) 3.2.19 (Fresh Air Dampers), (14) 3.2.21 (Grill Options), (15) 3.2.23 (High-effectiveness Indoor Air Filtration), (16) 3.2.24 (Hot Gas Bypass), (17) 3.2.27 (Integrated Energy Efficiency Ratio), (18) 3.2.28 (Low-static Heat Pump), (19) 3.2.35 (Power Correction Capacitors), (20) 3.2.36 (Powered Exhaust Air Fan), (21) 3.2.37 (Powered Return Air Fan), (22) 3.2.38 (Process Heat Recovery/Reclaim Coils/Thermal Storage), (23) 3.2.40 (Published Rating), (24) 3.2.42 (Refrigerant Reheat Coils), (25) 3.2.43 (Single Package Heat Pumps), (26) 3.2.44 (Sound Traps/Sound Attenuators), (27) 3.2.45 (Split System Heat Pump), (28) 3.2.51 (Steam/Hydronic Heat Coils), (29) 3.2.53 (UV Lights), (30) 3.2.54 (Ventilation Energy Recovery System), (31) 3.2.55 (Water/Brine to Air Heat Pump Equipment), and (32) 3.2.56 (Waterside Economizer), (d) The following subsections of section 6 Rating Requirements are inapplicable: (1) 6.5 (Residential Cooling Capacity and Efficiency), (2) 6.6 (Residential Heating Capacity and Efficiency), (3) 6.7 (Test Data vs Computer Simulation), (4) 6.8 (Rounding and Precision), (5) 6.9 (Uncertainty), and (6) 6.10 (Verification Testing), (e) Section 7 Minimum Data Requirements for Published Ratings is inapplicable (f) Section 8 Operating Requirements is inapplicable, (g) Section 9 Marking and Nameplate Data is inapplicable, (h) Section 10 Conformance Conditions is inapplicable, (i) Appendix B References—Informative is inapplicable, (j) Sections D.1 (Purpose), D.2 (Configuration Requirements), and D.3 (Optional System Features) of Appendix D Unit Configuration For Standard Efficiency Determination—Normative are inapplicable, and (k) Appendix F Example of Determination of Fan and Motor Efficiency for Non-standard Integrated Indoor Fan and Motors—Informative is inapplicable. (a) Section 1 Purpose is inapplicable. (b) Section 2 Scope is inapplicable. (c) Section 4 Classification is inapplicable. Determine integrated energy efficiency ratio (IEER) and heating applied coefficient of performance (ACOP) in accordance with this appendix and the applicable sections of AHRI 600-2023, ANSI/ASHRAE 37-2009, and Melinder 2010. Representations of AEER, EER, and COP may optionally be made. Section 3 of this appendix provides additional instructions for testing. In cases where there is a conflict, the language of this appendix takes highest precedence, followed by AHRI 600-2023, followed by ANSI/ASHRAE 37-2009. Any subsequent amendment to a referenced document by the standard-setting organization will not affect the test procedure in this appendix, unless and until the test procedure is amended by DOE. Material is incorporated as it exists on the date of the approval, and a notification of any change in the incorporation must be published in the Federal Register. When testing a water-source heat pump that includes any of the features listed in table 1 to this appendix, test in accordance with the setup and test provisions specified in table 1 to this appendix. Table 1 to Appendix C1—Setup and Test Provisions for Specific Components