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Federal Register / Vol. 86, No. 58 / Monday, March 29, 2021 / Rules and Regulations
appendix. If a unit can operate on multiple operating voltages as distributed in commerce by the manufacturer, test it and rate the corresponding basic models at all nameplate operating voltages. For a variablespeed room air conditioner, test the unit following the cooling mode test a total of four times: One test at each of the test conditions listed in Table 1 of this appendix, consistent with section 4.1 of this appendix.
3.1.1 Through-the-wall installation.
Install a non-louvered room air conditioner inside a compatible wall sleeve with the provided or manufacturer-required rear grille, and with only the included trim frame and other manufacturer-provided installation materials, per manufacturer instructions provided to consumers.
3.1.2 Power measurement accuracy. All instruments used for measuring electrical inputs to the test unit, reconditioning equipment, and any other equipment that operates within the calorimeter walls must be accurate to 0.5 percent of the quantity measured.
3.1.3 Electrical supply. For cooling mode testing, test at each nameplate operating voltage, and maintain the input standard voltage within 1 percent. Test at the rated frequency, maintained within 1 percent.
3.1.4 Control settings. If the room air conditioner has network capabilities, all
network features must be disabled throughout testing.
3.1.5 Measurement resolution. Record measurements at the resolution of the test instrumentation.
3.1.6 Temperature tolerances. Maintain each of the measured chamber dry-bulb and wet-bulb temperatures within a range of 1.0 F.
3.2 Standby and off modes.
3.2.1 Install the room air conditioner in accordance with Section 5, Paragraph 5.2 of IEC 62301 and maintain the indoor test conditions and outdoor test conditions where applicable as required by Section 4, Paragraph 4.2 of IEC 62301. If testing is not conducted in a facility used for testing cooling mode performance, the test facility must comply with Section 4, Paragraph 4.2
of IEC 62301.
3.2.2 Electrical supply. For standby mode and off mode testing, maintain the electrical supply voltage and frequency according to the requirements in Section 4, Paragraph 4.3.1 of IEC 62301.
3.2.3 Supply voltage waveform. For the standby mode and off mode testing, maintain the electrical supply voltage waveform indicated in Section 4, Paragraph 4.3.2 of IEC
62301.
3.2.4 Wattmeter. The wattmeter used to measure standby mode and off mode power
consumption must meet the resolution and accuracy requirements in Section 4, Paragraph 4.4 of IEC 62301.
3.2.5 Air ventilation damper. If the unit is equipped with an outdoor air ventilation damper, close this damper during standby mode and off mode testing.
4. Test Conditions and Measurements 4.1 Cooling mode.
4.1.1 Temperature conditions. Establish the test conditions described in Sections 4
and 5 of AHAM RAC1 and in accordance with ANSI/ASHRAE 16, including the references to ANSI/ASHRAE 41.1 and ANSI/
ASHRAE 41.62014, for cooling mode testing, with the following exceptions for variable-speed room air conditioners:
Conduct the set of four cooling mode tests with the test conditions presented in Table 1 of this appendix. For test condition 1 and test condition 2, achieve the full compressor speed with user settings, as defined in section 2.12 of this appendix. For test condition 3 and test condition 4, set the required compressor speed in accordance with instructions the manufacturer provided to DOE.

TABLE 1INDOOR AND OUTDOOR INLET AIR TEST CONDITIONSVARIABLE-SPEED ROOM AIR CONDITIONERS
Evaporator inlet indoor air, F

Test condition
Dry bulb Test Test Test Test
Condition Condition Condition Condition
1 2
3 4

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Wet bulb 80
80
80
80

4.1.2 Cooling capacity and power measurements. For single-speed units, measure the cooling mode cooling capacity expressed in Btu/h, Capacity, and electrical power input expressed in watts, Pcool, in accordance with Section 6, Paragraphs 6.1
and 6.2 of AHAM RAC1, respectively, and in accordance with ANSI/ASHRAE 16, including the references to ANSI/ASHRAE
41.21987 RA 1992 and ANSI/ASHRAE
41.112014. For variable-speed room air conditioners, measure the condition-specific cooling capacity expressed in Btu/h, Capacitytc, and electrical power input expressed in watts, Ptc, for each of the four cooling mode rating test conditions tc, as required in Section 6, Paragraphs 6.1 and 6.2, respectively, of AHAM RAC1, respectively, and in accordance with ANSI/ASHRAE 16, including the references to ANSI/ASHRAE
41.21987 RA 1992 and ANSI/ASHRAE
41.112014.
4.2 Standby and off modes. Establish the testing conditions set forth in section 3.2 of this appendix, ensuring the unit does not enter any active mode during the test. For a unit that drops from a higher power state to a lower power state as discussed in Section 5, Paragraph 5.1, Note 1 of IEC 62301, allow sufficient time for the room air conditioner
Condenser inlet outdoor air, F
Dry bulb 67
67
67
67

95
92
87
82

to reach the lower power state before proceeding with the test measurement. Use the sampling method test procedure specified in Section 5, Paragraph 5.3.2 of IEC 62301 for testing all standby and off modes, with the following modifications: Allow the product to stabilize for 5 to 10 minutes and use an energy use measurement period of 5 minutes.
4.2.1 If the unit has an inactive mode, as defined in section 2.14 of this appendix, as defined in section 2.17 of this appendix, measure and record the average inactive mode power, Pia, in watts.
4.2.2 If the unit has an off mode, as defined in section 2.17 of this appendix, measure and record the average off mode power, Pom, in watts.
5. Calculations 5.1 Annual energy consumption in inactive mode and off mode. Calculate the annual energy consumption in inactive mode and off mode, AECia/om, expressed in kilowatt-hours per year kWh/year.
AECia/om = Pia tia + Pom + tom Where:
AECia/om = annual energy consumption in inactive mode and off mode, in kWh/
year.

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Compressor speed
Wet bulb 75
72.5
69
65

Full.
Full.
Intermediate.
Low.

Pia = average power in inactive mode, in watts, determined in section 4.2 of this appendix.
Pom = average power in off mode, in watts, determined in section 4.2 of this appendix.
tia = annual operating hours in inactive mode and multiplied by a 0.001 kWh/Wh conversion factor from watt-hours to kilowatt-hours. This value is 5.115 kWh/
W if the unit has inactive mode and no off mode, 2.5575 kWh/W if the unit has both inactive and off mode, and 0 kWh/
W if the unit does not have inactive mode.
tom = annual operating hours in off mode and multiplied by a 0.001 kWh/Wh conversion factor from watt-hours to kilowatt-hours. This value is 5.115 kWh/
W if the unit has off mode and no inactive mode, 2.5575 kWh/W if the unit has both inactive and off mode, and 0
kWh/W if the unit does not have off mode.
5.2 Combined energy efficiency ratio for single-speed room air conditioners. Calculate the combined energy efficiency ratio for single-speed room air conditioners as follows:

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29MRR2