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Federal Register / Vol. 86, No. 235 / Friday, December 10, 2021 / Proposed Rules set forth in 429.11 and paragraph a1
of this section if the represented values are determined through testing, or in accordance with the provisions for applying an AEDM set forth in paragraph a2 of this section and 429.70.
2 If a basic model includes more than one type of indoor unit combination i.e., ducted, non-ducted, and/or SDHV, a manufacturer must determine separate represented values for each type of indoor unit combination. If the represented values are determined through testing, a manufacturer must test, at a minimum, a single tested combination for each type of indoor unit combination included in that basic model. A
manufacturer may alternatively determine separate represented values
through application of an AEDM as set forth in paragraph a2 of this section and 429.70. A manufacturer may also determine optional mixed representations by calculating the mean value across any two required representations described in this paragraph i.e., a representation for mixed ducted/non-ducted would be determined by averaging the ducted representation and the non-ducted representation, a representation for mixed ducted/SDHV would be determined by averaging the ducted representation and the SDHV
representation, and a representation for mixed non-ducted/SDHV would be determined by averaging the non-ducted representation and the SDHV
representation.

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4 Determination of represented values for individual models with specific components for VRF multi-split systems.
i If a manufacturer distributes in commerce indoor unit models in a tested combination within a basic model with one of the components listed in the following table, determination of represented values is dependent on the selected grouping of individual indoor unit models into a tested combination within a basic model, as indicated in paragraphs a4ii through v of this section. For the purposes of this paragraph, otherwise identical means differing only in the presence of specific components listed in table 1 to paragraph a4i.

TABLE 1 TO PARAGRAPH a4i Component
Description
Air economizers

An automatic system that enables a cooling system to supply and use outdoor air to reduce or eliminate the need for mechanical cooling during mild or cold weather.
An assembly that reduced the moisture content of the supply air through moisture transfer with solid or liquid desiccants.

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Dehumidification Components

ii If the indoor unit models in a tested combination within a basic model include only individual indoor unit models distributed in commerce without a specific component listed in paragraph a4i of this section, the manufacturer must determine represented values for the tested combination based on performance of individual indoor unit models distributed in commerce without the component.
iii If the indoor unit models in a tested combination within a basic model include only individual indoor unit models distributed in commerce with a specific component listed in paragraph a4i of this section, the manufacturer must determine represented values for the tested combination based on performance of individual indoor unit models with the component present and consistent with any componentspecific test provisions specified in section 6 of appendix D1 to subpart F
of part 431.
iv If the indoor unit models in a tested combination within a basic model A Include both individual indoor unit models distributed in commerce with a specific component listed in paragraph a4i of this section and individual indoor unit models distributed in commerce without that specific component, and
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B None of the individual indoor unit models distributed in commerce without the specific component are otherwise identical to any individual indoor unit model distributed in commerce with that specific component, the manufacturer must consider the performance of individual indoor unit models with the component present when determining represented values for the tested combination within a basic model and consistent with any component-specific test provisions specified in section 6 of appendix D1 to subpart F of part 431.
v If the indoor unit models in a tested combination within a basic model A Include both individual indoor unit models distributed in commerce with a specific component listed in paragraph a4i of this section and individual indoor unit models distributed in commerce without that specific component, and B At least one of the individual indoor unit models distributed in commerce without the specific component is otherwise identical to any given individual indoor unit model distributed in commerce with the specific component, the manufacturer may determine represented values for the tested combination within a basic model either:
1 Based on performance of individual indoor unit models
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distributed in commerce without the specific component, or 2 Based on performance of individual indoor unit models with the specific component present and consistent with any component-specific test provisions specified in section 6 of appendix D1 to subpart F of part 431.
vi In any of the cases specified in paragraphs a4ii through v of this section, the represented values for a tested combination within a basic model must be determined in accordance with paragraph a3 of this section, through either testing or an AEDM.
5 Heat Recovery. For basic models of VRF multi-split systems distributed in commerce with heat recovery components, the manufacturer must determine represented values for the basic model based on performance of an individual model distributed in commerce with heat recovery components.
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xi Variable refrigerant flow multisplit air-cooled air conditioners except those with rated cooling capacity less than 65,000 Btu/h:
A When certifying compliance with an EER standard: The energy efficiency ratio EER in British thermal units per Watt-hour Btu/Wh, rated cooling capacity in British thermal units per hour Btu/h, and the types of heating
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