Federal Register, Volume 75, Number 226, November 24, 2010, Pages 71519-72652 Page: 71,605

Federal Register/Vol. 75, No. 226/Wednesday, November 24, 2010/Proposed Rules

TABLE I111.1. EER FOR SELF-CON-
TAINED COMMERCIAL REFRIGERATED
DISPLAY MERCHANDISERS AND
STORAGE CABINETS-Continued
Operating temperature EER
class Btu/W
Ice C ream ........................... 4.80
Note:
1 EER values for operating temperature
classes are calculated based on the average
EER value of all equipment in that class which
was analyzed as part of the previous (2009)
rulemaking. This does not include equipment
for which standards were set by Congress in
EPACT 2005 (VCT, VCS, HCT, HCS, and
SOC at M and L temperatures) or classes for
which standards were set using extension
multipliers in the 2009 rulemaking (VOP.SC.L,
SVO.SC.L, VOP.SC.I, SVO.SC.I, HZO.SC.I,
VOP.SC.I, SVO.SC.I, HZO.SC.I, HCS.SC.I,
SOC.SC.1).

2These values only represent compressor
EER and do not include condenser fan energy
use.
The CECA includes a multiplication
factor of 0.75 to account for the fact that
not all of the heat produced from the
lights will impact the compressor load.
The factor of 0.75 was suggested by
manufacturers during discussions with
the AHRI Standard 1200 engineering
committee.
For remote condensing commercial
refrigerators, freezers, and refrigerator-
freezers with lighting occupancy
sensors, controls, or both installed, the
revised compressor energy consumption
(CECR) shall be the CECA added to the
compressor energy consumption (CEC)
measured in AHRI Standard 1200-2010,
as shown in equation 5.

Eq. 5

Where:
CECR = reduced compressor energy
consumption (kilowatt-hours);
CEC= compressor energy consumption as
measured by AHRI Standard 1200
(kilowatt-hours); and
CECA = alternate compressor energy
consumption (kilowatt-hours).
The CECR and LECC value would then
be substituted for the lighting
energy consumption (LEC) and CEC
without controls or sensors in the
calculation of CDEC for remote
condensing cases as shown in
equation 6.

Eq. 6

Where:
CDEC= combined daily energy consumption
(kilowatt-hours);
CECR = reduced compressor energy
consumption (kilowatt-hours);
FEC= fan energy consumption (kilowatt-
hours);
LECsc = lighting energy consumption with
lighting sensors and controls deployed
(kilowatt-hours);

AEC= anti-condensate energy consumption
(kilowatt-hours);
DEC= defrost energy consumption (kilowatt-
hours); and
PEC =condensate evaporator pan energy
consumption (kilowatt-hours).
For self-contained equipment, the
CECA and LECC would be calculated as
above and then used directly with the

total daily energy consumption as
measured by AHRI Standard 1200-2010,
with the lights fully on to determine the
daily energy consumption used to show
compliance with the DOE energy
conservation standard for this
equipment as shown in equation 7. For
self-contained equipment:

EIlBC QT CQ4 (EEL -Cr

Where:
TDECo = total daily energy consumption with
lights fully on, as measured by AHRI
Standard 1200-2010 (kilowatt-hours);
P, = rated power of lights when they are fully
on (watts);
t = time period when lights would be on
without lighting occupancy sensors or
controls (24 hours); and
LECsc = lighting energy consumption with
lighting occupancy sensors and controls
deployed (kilowatt-hours).
The test procedure modifications to
account for lighting occupancy sensors
and controls would only apply to
commercial refrigeration equipment
sold with lighting occupancy sensors
and controls installed by the
manufacturers. However, this analytical
method would place the least additional
burden on manufacturers and would be
a standard for all commercial
refrigeration equipment sold with
lighting occupancy sensors and
controls, regardless of their anticipated
use.
DOE requests comment on the
proposed calculation method for
treatment of lighting occupancy sensors

and controls in the DOE test procedure
for commercial refrigeration equipment.
Specifically, DOE requests comment on
the values assumed for the time period
when lighting is off or reduced due to
lighting occupancy sensors or controls
and the factor used to scale the amount
of heat produced by case lighting.
4. Include Provision for Testing at
Lowest Application Product
Temperature
During the Framework public meeting
and Framework comment period of the
2009 energy conservation standard
rulemaking, DOE received comments on
the inclusion of "application
temperatures" for commercial
refrigeration equipment. Application
temperatures are rating temperatures
other than the standard rating
temperatures prescribed by DOE's test
procedures (38 OF for commercial
refrigerators, 0 OF for commercial
freezers, and - 15 OF for commercial ice-
cream freezers). Interested parties
commented that allowing for an
application temperature category is

essential because operating temperature
plays a key role in equipment energy
consumption. However, interested
parties stated that the application
temperature category should be reserved
for equipment that cannot operate at
0 OF or at 38 F; that DOE should not
regulate equipment that has few
shipments; and that appropriate Federal
standards and rating temperatures
should be developed for equipment
with large numbers of shipments.
DOE analyzed the shipments data
provided by ARI during the Framework
comment period of the 2009
rulemaking. DOE found that, excluding
equipment for which EPACT 2005
amended EPCA to set standards (self-
contained commercial refrigerators and
commercial freezers with doors), only
1.7 percent of units under the previous
rulemaking were equipment that operate
at "application temperatures," namely
45 F, 20 F, 10 OF, or -30 OF. Of these,
units that operate at 45 OF (typically
"wine chillers") had the highest
shipments, and these were
predominantly remote condensing

Eq. 7

71605

CEQR CA +cC

CDECG m Ca +tF FEC + LE, + AE + DEC D L EC