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Federal Register / Vol. 86, No. 235 / Friday, December 10, 2021 / Proposed Rules per minute gpm for water-cooled units only; rated static pressure in inches of water; compressor frequency set points;
required dip switch/control settings for step or variable components; a statement whether the model will operate at test conditions without manufacturer programming; any additional testing instructions if applicable; if a variety of motors/drive kits are offered for sale as options in the basic model to account for varying installation requirements, the model number and specifications of the motor to include efficiency, horsepower, open/closed, and number of poles and the drive kit, including settings, associated with that specific motor that were used to determine the certified rating; and which, if any, special features were included in rating the basic model. Additionally, upon DOE
request, the manufacturer must provide a layout of the system set-up for testing including charging instructions consistent with the installation manual.
B When certifying compliance with an IEER standard for requirements in this list pertaining to or affected by indoor units, the requirements must be certified for each tested combination as required under paragraph a3ivB of this section: The nominal cooling capacity in British thermal units per hour Btu/h for each indoor and outdoor unit; the nominal heating capacity Btu/h for each indoor and outdoor unit; components needed for heat recovery, if applicable;
identification of the indoor units to be thermally active for each IEER test point; the rated indoor airflow for the full-load cooling, full-load heating, and all part-load cooling tests for each indoor unit in standard cubic feet per minute scfm; the indoor airflowcontrol setting to be used in the fullload cooling test for each indoor unit;
the airflow-control setting to be used in the full-load heating test for each indoor unit; for water-cooled unitsthe rated water flow rate in gallons per minute gpm; system start-up or initialization procedures, including conditions and duration; compressor break-in period duration; the frequency of oil-recovery cycles; operational settings for all critical parameters to be controlled at each of the four IEER
cooling test conditions; operational settings for all critical parameters to be controlled for the heating test; required dip switch/control settings;
identification of any system control device required for testing; a hierarchy of instructions for adjustment of critical parameters to reduce cooling capacity during IEER cooling tests to be used if,
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using initial critical parameter settings, the measured cooling capacity is more than 3 percent above the target cooling capacity; any additional testing instructions if applicable; and if a variety of motors/drive kits are offered for sale as options in the basic model to account for varying installation requirements, the model number and specifications of the motor to include efficiency, horsepower, open/closed, and number of poles and the drive kit, including settings, associated with that specific motor that were used to determine the certified rating.
Instructions for conducting a controls verification procedure as described in Appendix C of AHRI 12302021 at each of the four IEER cooling test conditions must also be provided, including the required thermostat setpoints to ensure control for 80 F dry-bulb temperature when accounting for set point bias, the starting indoor dry-bulb temperature, and the indoor dry-bulb temperature ramp rate R2. Additionally, the manufacturer must provide a layout of the system set-up for testing including a piping diagram, a power wiring diagram, a control wiring diagram, and identification of the location of the components corresponding to each critical parameter to be adjusted, setup instructions for indoor units and outdoor units, and charging instructions consistent with the installation manual.
Also, the manufacturer must certify for which, if any, specific components as listed in paragraph a4i of this section the following provisions are applicable:
1 The indoor unit models in a tested combination within a basic model include both individual indoor unit models distributed in commerce with the specific component and individual indoor unit models distributed in commerce without the specific component;
2 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; and 3 Represented values for the tested combination are based on performance of individual indoor unit models distributed in commerce without the specific component.

5 For variable refrigerant flow multisplit air conditioners and heat pumps other than air-cooled with rated cooling capacity less than 65,000 btu/h, if a manufacturer has knowledge that any of its certified operational settings for
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critical parameters to be controlled during IEER tests per paragraphs b4viiB or b4viiiB of this section are invalid according to the results of a controls verification procedure appropriately conducted according to 429.134s3, then the manufacturer must re-certify valid operational settings for critical parameters for all affected basic models, and re-rate and re-certify all affected basic models.

4. Amend 429.70 by revising paragraph c2i to read as follows:
429.70 Alternative methods for determining energy efficiency and energy use.

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i The manufacturer must select at least the minimum number of basic models for each validation class specified in paragraph c2iv of this section to which the particular AEDM
applies. Using the AEDM, calculate the energy use or efficiency for each of the selected basic models.
A Except for variable refrigerant flow multi-split air conditioners and heat pumps other than air-cooled with rated cooling capacity less than 65,000
btu/h when certifying to standards in terms of IEER, test a single unit of each selected basic model in accordance with paragraph c2iii of this section.
Compare the results from the single unit test and the AEDM energy use or efficiency output according to paragraph c2ii of this section. The manufacturer is responsible for ensuring the accuracy and reliability of the AEDM.
B For variable refrigerant flow multisplit air conditioners and heat pumps other than air-cooled with rated cooling capacity less than 65,000 btu/h when certifying to standards in terms of IEER, the following provisions apply.
1 If a manufacturer makes representations for a single type of indoor unit combination i.e., only ducted, non-ducted, or SDHV indoor unit combinations across all the basic models for which an AEDM applies, the manufacturer must test at least a single tested combination of that type of indoor unit combination for each selected basic model in accordance with paragraph c2iii of this section.
2 If a manufacturer makes representations for two types of indoor unit combinations i.e., ducted, nonducted, and/or SDHV within or across all the basic models for which the AEDM applies, the manufacturer must test at least a single tested combination
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