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Federal Register / Vol. 86, No. 163 / Thursday, August 26, 2021 / Notices
symmetrically restricting the outlet duct.22
The alternate test procedure also describes the requirements for measurement of ESP consistent with provisions provided in section C9.1.1.2
of AHRI 12502020 when using the indoor air enthalpy method with unit coolers.
DOE notes that, despite the request from LRC Coil, it is not including a 0.55
correction factor in the alternate test procedure required by the Interim Waiver Order. The company sought to include a 0.55 correction factor to adjust for average use, stating that wine cellars do not experience highand low-load conditions, but rather operate at steady state conditions in a predominately airconditioned environment, but did not provide any additional support for this recommendation. While not specifically addressed in the request for waiver submitted by LRC Coil, waivers submitted by other manufacturers have stated that the suggested 0.55 correction factor addresses the differences in run time and compressor inefficiency of wine cellar walk-in cooler refrigeration systems as compared to walk-in cooler refrigeration systems more generally and have suggested that the run time for wine cellar walk-in cooler refrigeration systems ranges from 50 to 75 percent.23
AHRI 12502009 accounts for percent
run time in the AWEF calculation by setting walk-in box load equal to specific fractions of refrigeration system net capacitythe fractions are defined based on whether the refrigeration system is for cooler or freezer applications, and whether it is designed for indoor or outdoor installation see sections 6.2 applicable to coolers and 6.3 applicable to freezers of AHRI
12502009. The alternate test procedure provided by this interim waiver requires calculating AWEF based on setting the walk-in box load equal to half of the refrigeration system net capacity, without variation according to highand low-load periods and without variation with outdoor air temperature for outdoor refrigeration systems.
Setting the walk-in box load equal to half the refrigeration system net capacity results in a refrigeration system run time fraction slightly above 50
percent, which is within the range suggested by other manufacturers of wine cellar walk-in cooler refrigeration systems as being representative for the specified basic models. As previously discussed, DOE regulates walk-in energy consumption at the component level, with separate test procedures for walkin refrigeration systems, doors, and panels. Section 6 of AHRI 12502009
provides equations for determining refrigeration box load as a function of
refrigeration system capacity. Using these equations with an assumed load factor of 50 percent maintains consistency with Appendix C while providing an appropriate load fraction for wine cellar walk-in cooler refrigeration systems. Accordingly, DOE
has declined to adopt a correction factor for the equipment at issue.
Based on DOEs review of LRC Coils petition, the required alternate test procedure specified in the Interim Waiver Order appears to allow for the accurate measurement of energy efficiency of the specified basic models, while alleviating the testing issues associated with LRC Coils implementation of wine cellar walk-in unit cooler testing for these basic models. Consequently, DOE has determined that LRC Coils petition for waiver will likely be granted.
Furthermore, DOE has determined that it is desirable for public policy reasons to grant LRC Coil immediate relief pending a determination of the petition for waiver.
For the reasons stated, it is ordered that:
LRC Coil must test and rate the following LRC branded wine cellar walk-in unit cooler basic models with the alternate test procedure set forth in paragraph 2.

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BASIC MODELS

22 This approach is used for testing of furnace fans, as described in section 8.6.1.1 of 10 CFR part 430, appendix AA to subpart B.

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SLA1854Q
SLA28108Q
SLA38163Q
SLA48217Q
SLA58270Q
SLA68322Q

SLPA2662Q
SLPA3695Q
SLPA46128Q
SLPA56162Q
SLPA66200Q

LPA1710Q
LPA1713Q
LPA2718Q
LPA2723Q
LPA3732Q
LPA4742Q
LPA5755Q
HS25CLEC
HS31CLEC
HS47CLEC
HS66CLEC
HS87CLEC
HS120CLEC
HS25EC
HS31EC
HS47EC
HS66EC
HS87EC
HS120EC
HS180EC
VAH25EC
VAH31EC

Q500W
Q750W
Q1000W
Q1350W
Q1640W
Q2000W
Q2600W
RM25EC
RM35EC
RM50EC
RM65EC
RM80EC

VRM25EC
VRM35EC

DQ207
DQ207C
DQ275
DQ275C
DQ345
DQ345C
DQ432
DQ541
DQ650
CE128Q
CE289Q
CD3129Q

RMD25EC
RMD35EC
RMD50EC
RMD65EC
RMD80EC

BK1740
BK2760

23 This runtime range was suggested by two other wine cellar walk-in refrigeration system manufacturers: Air Innovations and CellarPro. See
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86 FR 2403, 2408 Jan. 12, 2021 and 86 FR 11972, 11977 Mar. 1, 2021, respectively.

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