Appendix G1 - Appendix G1 to Subpart F of Part 431—Uniform Test Method for Measuring the Energy Consumption of Single Package Vertical Air Conditioners and Single Package Vertical Heat Pumps
Beginning December 4, 2023, if manufacturers make voluntary representations with respect to the integrated energy efficiency ratio (IEER) of single packaged vertical air conditioners and single package vertical heat pumps, such representations must be based on testing conducted in accordance with this appendix.
Manufacturers must use the results of testing under this appendix to determine compliance with any amended standards for single packaged vertical air conditioners and single package vertical heat pumps based on IEER provided in § 431.97 that are published after January 1, 2021. Representations related to energy consumption must be made in accordance with the appropriate appendix that applies (i.e., appendix G to this subpart or this appendix) when determining compliance with the relevant standard. Manufacturers may also use this appendix to certify compliance with any amended standards prior to the applicable compliance date for those standards.
1. Incorporation by ReferenceDOE incorporated by reference in § 431.95 the entire standard for AHRI 390-2021 and ASHRAE 37-2009. However, only certain enumerated provisions of AHRI 390-2021 and ANSI/ASHRAE 37-2009 are required or excluded as listed in this section 1. To the extent there is a conflict between the terms or provisions of a referenced industry standard and this appendix, the appendix provisions control, followed by AHRI 390-2021, followed by ANSI/ASHRAE 37-2009.
1.1. Only the following provisions of AHRI 390-2021 apply:
(a) Section 3—Definitions (omitting sections 3.1, 3.2, 3.5, 3.12, and 3.15) (b) Section 5—Test Requirements (omitting section 5.8.5) c) Section 6—Rating Requirements (omitting sections 6.1.1 and 6.3 through 6.5) (d) Appendix A. “References—Normative” (e) Appendix D. “Indoor and Outdoor Air Condition Measurement—Normative” (f) Appendix E. “Method of Testing Single Package Vertical Units—Normative”1.2. All provisions of ANSI/ASHRAE 37-2009 apply except for the following provisions:
(a) Section 1—Purpose (b) Section 2—Scope (c) Section 4—Classifications2. General. Determine cooling capacity (Btu/h) and integrated energy efficiency ratio (IEER) for all single package vertical air conditioners and heat pumps and coefficient of performance (COP) for all single package vertical heat pumps, in accordance with the specified sections of AHRI 390-2021and the specified sections of ANSI/ASHRAE 37-2009. Only identified provisions of AHRI 390-2021 and ANSI/ASHRAE 37-2009 are applicable, as set forth in section 1 of this appendix. In addition, the instructions in section 4 of this appendix apply to determining IEER and COP. Any subsequent amendment to a referenced document by a standard-setting organization will not affect the test procedure in this appendix, unless and until the test procedure is amended by DOE.
3. Test Conditions. The “Part-Load Standard Rating Conditions” conditions for cooling mode tests and “Standard Rating Full Load Capacity Test, Heating” conditions for heat pump heating mode tests specified in Table 3 of section 5.8.3 of AHRI 390-2021 shall be used.
3.1. Optional Representations. Representations of COP for single package vertical heat pumps made using the “Low Temperature Operation, Heating” condition specified in Table 3 of section 5.8.3 of AHRI 390-2021 are optional and are determined according to the applicable provisions in section 1.1 of this appendix.
4. Set-Up and Test Provisions for Specific Components. When testing a single package vertical unit (SPVU) that includes any of the features listed in table 4.1 to this appendix, test in accordance with the set-up and test provisions specified in table 4.1 to this appendix.
Table 4.1—Test Provisions for Specific Components
| Component | Description | Test provisions | Desiccant Dehumidification Components | An assembly that reduces the moisture content of the supply air through moisture transfer with solid or liquid desiccants | Disable desiccant dehumidification components for testing. | Air Economizers | An automatic system that enables a cooling system to supply outdoor air to reduce or eliminate the need for mechanical cooling during mid or cold weather | For any air economizer that is factory-installed, place the economizer in the 100% return position and close and seal the outside air dampers for testing. For any modular air economizer shipped with the unit but not factory-installed, do not install the economizer for testing. | Fresh Air Dampers | An assembly with dampers and means to set the damper position in a closed and one open position to allow air to be drawn into the equipment when the indoor fan is operating | For any fresh air dampers that are factory-installed, close and seal the dampers for testing. For any modular fresh air dampers shipped with the unit but not factory-installed, do not install the dampers for testing. | Hail Guards | A grille or similar structure mounted to the outside of the unit covering the outdoor coil to protect the coil from hail, flying debris and damage from large objects | Remove hail guards for testing. | Power Correction Capacitors | A capacitor that increases the power factor measured at the line connection to the equipment | Remove power correction capacitors for testing. | Ventilation Energy Recovery System (VERS) | An assembly that preconditions outdoor air entering the equipment through direct or indirect thermal and/or moisture exchange with the exhaust air, which is defined as the building air being exhausted to the outside from the equipment | For any VERS that is factory-installed, place the VERS in the 100% return position and close and seal the outside air dampers and exhaust air dampers for testing, and do not energize any VERS subcomponents ( | Barometric Relief Dampers | An assembly with dampers and means to automatically set the damper position in a closed position and one or more open positions to allow venting directly to the outside a portion of the building air that is returning to the unit, rather than allowing it to recirculate to the indoor coil and back to the building | For any barometric relief dampers that are factory-installed, close and seal the dampers for testing. For any modular barometric relief dampers shipped with the unit but not factory-installed, do not install the dampers for testing. | UV Lights | A lighting fixture and lamp mounted so that it shines light on the indoor coil, that emits ultraviolet light to inhibit growth of organisms on the indoor coil surfaces, the condensate drip pan, and/other locations within the equipment | Turn off UV lights for testing. | Steam/Hydronic Heat Coils | Coils used to provide supplemental heating | Test with steam/hydronic heat coils in place but providing no heat. | Hot Gas Reheat | A heat exchanger located downstream of the indoor coil that heats the Supply Air during cooling operation using high pressure refrigerant in order to increase the ratio of moisture removal to Cooling Capacity provided by the equipment | De-activate refrigerant reheat coils for testing so as to provide the minimum (none if possible) reheat achievable by the system controls. | Sound Traps/Sound Attenuators | An assembly of structures through which the Supply Air passes before leaving the equipment or through which the return air from the building passes immediately after entering the equipment for which the sound insertion loss is at least 6 dB for the 125 Hz octave band frequency range | Removable sound traps/sound attenuators shall be removed for testing. Otherwise, test with sound traps/attenuators in place. | Fire/Smoke/Isolation Dampers | A damper assembly including means to open and close the damper mounted at the supply or return duct opening of the equipment | For any fire/smoke/isolation dampers that are factory-installed, set the dampers in the fully open position for testing. For any modular fire/smoke/isolation dampers shipped with the unit but not factory-installed, do not install the dampers for testing. |
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