[Federal Register Volume 60, Number 152 (Tuesday, August 8, 1995)]
[Notices]
[Pages 40358-40370]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 95-19203]



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DEPARTMENT OF ENERGY

Office of Energy Efficiency and Renewable Energy


Energy Conservation Program for Consumer Products: Granting of 
NORDYNE's Application for Interim Waiver from the Department of 
Energy's Central Air Conditioner and Central Air Conditioning Heat Pump 
Test Procedure and Publication of the Petition for Waiver. (Case No. 
CAC-007)

AGENCY: Office of Energy Efficiency and Renewable Energy, Department of 
Energy.

ACTION: Notice.

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SUMMARY: Today's notice publishes a letter granting an Interim Waiver 
to NORDYNE from the existing Department of Energy central air 
conditioner and central air conditioning heat pump test procedure for 
the company's Powermiser line of heat pumps with integrated domestic 
water heating.
    Today's notice also publishes a ``Petition for Waiver'' from 
NORDYNE. The Petition for Waiver requests the Department to modify the 
heat pump test procedure for the NORDYNE Powermiser line of heat pumps 
which include special design characteristics to incorporate domestic 
water heating. The Department is soliciting comments, data, and 
information respecting the Petition for Waiver.

DATES: The Department will accept comments, data, and information not 
later than September 7, 1995.

ADDRESSES: Written comments and statements shall be sent to: Department 
of Energy, Office of Energy Efficiency and Renewable Energy, Case No. 
CAC-007, Mail Stop EE-43, Room 1J-018, Forrestal Building, 1000 
Independence Avenue, SW, Washington, DC 20585, (202) 586-7574.

FOR FURTHER INFORMATION CONTACT:

Michael G. Raymond, U.S. Department of Energy, Office of Energy 
Efficiency and Renewable Energy, Mail Station EE-431, Forrestal 
Building, 1000 Independence Avenue, SW., Washington, DC 20585, (202) 
586-9611
Eugene Margolis, Esq., U.S. Department of Energy, Office of General 
Counsel, Mail Station GC-72, Forrestal Building, 1000 Independence 
Avenue, SW., Washington, DC 20585, (202) 586-9507

SUPPLEMENTARY INFORMATION: The Energy Conservation Program for Consumer 
Products (other than automobiles) was established pursuant to the 
Energy Policy and Conservation Act (EPCA), Public Law 94-163, 89 Stat. 
917, as amended by the National Energy Conservation Policy Act (NECPA), 
Public Law 95-619, 92 Stat. 3266, the National Appliance Energy 
Conservation Act of 1987 (NAECA), Public Law 100-12, the National 
Appliance Energy Conservation Amendments of 1988 (NAECA 1988), Public 
Law 100-357, and the Energy Policy Act of 1992 (EPACT), Public Law 102-
486, 106 Stat. 2776, which requires the Department to prescribe 
standardized test procedures to measure the energy consumption of 
certain consumer products, including heat pumps. The intent of the test 
procedures is to provide a comparable measure of energy consumption 
that will assist consumers in making purchasing decisions. The test 
procedures for central air conditioners and central air conditioning 
heat pumps appear at 10 CFR Part 430, Subpart B, Appendix M.
    The Department amended the prescribed test procedures by adding 10 
CFR 430.27 on September 26, 1980, creating the waiver process. 45 FR 
64108. The Department further amended the appliance test procedure 
waiver process to allow the Assistant Secretary for Energy Efficiency 
and Renewable Energy (Assistant Secretary) to grant an Interim Waiver 
from test procedure requirements to manufacturers that have petitioned 
the Department for a waiver of such prescribed test procedures. 51 FR 
42823, November 26, 1986.
    The waiver process allows the Assistant Secretary to temporarily 
waive test procedures for a particular basic model when a petitioner 
shows that the basic model contains one or more design characteristics 
which prevent testing according to the prescribed test procedures, or 
when the prescribed test procedures may evaluate the basic model in a 
manner so unrepresentative of its true energy consumption as to provide 
materially inaccurate comparative data. Waivers generally remain in 
effect until final test procedure amendments become effective, 
resolving the problem that is the subject of the waiver.
    The Interim Waiver provisions added by the 1986 amendment allow the 
Secretary to grant an Interim Waiver when it is determined that the 
applicant will experience economic hardship if the Application for 
Interim Waiver is denied, if it appears likely that the Petition for 
Waiver will be granted, and/or the Assistant Secretary determines that 
it would be desirable for public policy reasons to grant immediate 
relief pending a determination on the Petition for Waiver. An Interim 
Waiver remains in effect for a period of 180 days, or until the 
Department issues its determination on the Petition for Waiver, 
whichever is sooner, and may be extended for an additional 180 days, if 
necessary.
    On January 24, 1995, NORDYNE filed a Petition for Waiver and an 
Application for Interim Waiver regarding the heat pump tests. NORDYNE's 
Petition seeks a Waiver from the Department's test procedure because, 
using the test procedure, the company cannot account for the energy 
savings associated with integrated water heating. NORDYNE has submitted 
a modified test procedure to be used for rating its Powermiser heat 
pumps. NORDYNE proposes to calculate, in addition to the standard SEER 
and HSPF, a Combined Cooling Performance Factor (CCPF) and a Combined 
Heating Performance Factor (CHPF). These performance factors reflect 
the energy efficiency of the heat pump when providing both space 
conditioning and domestic water heating. The heating and cooling mode 
test procedures are essentially the same as the current Department 
central air conditioner test procedures found in 10 CFR Part 430, 
Subpart B, Appendix M. The NORDYNE test procedures for the heating and 
cooling modes differ from the Department's in their use of a bin 
analysis for SEER, and the use of seasonal hours rather than fractional 
hours for HSPF. NORDYNE states in its Petition that the modified test 
procedure for SEER and HSPF ``yields a nearly identical result and 
provides a directly comparable base for use in determining 

[[Page 40359]]
energy savings associated with water heating.'' In addition, NORDYNE 
submitted tests and a rating procedure to determine the performance of 
the heat pump when it heats domestic water (whether or not space 
heating or cooling is also being provided).
    NORDYNE also applied for an Interim Waiver, stating:
     The current test procedure does not account for the total 
energy savings of the Powermiser;
     Carrier Corporation has been granted a similar waiver for 
its Hydrotech product;
     For public policy reasons, the widespread use of this type 
of integrated appliance would be in direct support of the President's 
Climate Change Action Plan, which lists heating and cooling and home 
appliances as key targets for improvement; and
     Absent a favorable determination on the Application for 
Interim Waiver, NORDYNE would experience an economic hardship, as 
discussed in the confidential statement filed simultaneously.
    The Department agrees that the current test procedure does not 
account for the total energy savings of the Powermiser. A previous 
waiver for this type of equipment was granted by the Department to 
Carrier Corporation for its HydroTech 2000, 55 FR 13607, April 11, 
1990. Thus, it appears likely that the Petition for Waiver will be 
granted.
    In those instances where the likely success of the Petition for 
Waiver has been demonstrated based upon the Department having granted a 
waiver for a similar product design, it is in the public interest to 
have similar products tested and rated for energy consumption on a 
comparable basis.
    Further, NORDYNE has supplied evidence of economic hardship if the 
Interim Waiver is not granted. NORDYNE's confidential statement claims 
a substantial investment in the Powermiser for research and 
development, tooling, production, sales and marketing. The Powermiser 
investment represents a large fraction of NORDYNE's annual income. 
Until the Interim Waiver is granted, NORDYNE is not able to realize any 
return on its investment.
    Based on the statements above, the Department is granting an 
Interim Waiver to NORDYNE for its Powermiser series integrated heat 
pumps. Pursuant to paragraph (e) of Section 430.27 of the Code of 
Federal Regulations part 430, the following letter granting the 
Application for Interim Waiver to NORDYNE was issued.
    Pursuant to paragraph (b) of 10 CFR Part 430.27, the Department is 
hereby publishing the ``Petition for Waiver.'' The Petition contains 
confidential company information; thus, the confidential attachment 
submitted by NORDYNE is not being published. Due to its length (39 
pages), NORDYNE's proposed alternate test procedure is not being 
published in the Federal Register. It is, however, available upon 
request at the address provided at the beginning of today's notice. 
NORDYNE has sent a copy of the Petition for Waiver and a copy of the 
Application for Interim Waiver to all known manufacturers of 
domestically marketed units of the same product type . A summary of the 
NORDYNE alternate test procedure is included in the letter to NORDYNE 
granting the Application for Interim Waiver, which is published with 
this Federal Register Notice.
    The Department solicits comments, data, and information respecting 
the Petition.

    Issued in Washington, DC., July 10, 1995.
Christine A. Ervin,
Assistant Secretary, Energy Efficiency and Renewable Energy.
July 10, 1995.
Mr. Wayne R. Reedy, Vice President--Engineering
NORDYNE, 1801 Park 270 Drive, P.O. Box 46911, St. Louis, MO 63146-
6911.

    Dear Mr. Reedy: This is in response to your letter of January 
24, 1995, submitting an Application for Interim Waiver and Petition 
for Waiver from the Department of Energy's central air conditioner 
and central air conditioning heat pump test procedure for NORDYNE's 
Powermiser line of heat pumps, which include special design 
characteristics to incorporate domestic water heating.
    The current test procedure does not account for the energy 
savings associated with integrated water heating. A previous waiver 
for this type of equipment has been granted to Carrier Corporation, 
55 FR 13607, April 11, 1990. Thus, it appears likely that the 
Petition for Waiver will be granted.
    In those instances where the likely success of the Petition for 
Waiver has been demonstrated based upon the Department having 
granted a waiver for a similar product design, it is in the public 
interest to have similar products tested and rated for energy 
consumption on a comparable basis.
    Further, NORDYNE's Application for Interim Waiver provides 
sufficient information to determine that NORDYNE has and will 
continue to experience a severe negative economic impact absent a 
favorable determination on its Application. NORDYNE's confidential 
statement claims a substantial investment in the Powermiser for 
research and development, tooling, production, sales and marketing. 
The Powermiser investment represents a large fraction of NORDYNE's 
annual income, and NORDYNE is not able to realize any return on this 
investment until the Interim Waiver is granted.
    Therefore, based on the above, NORDYNE's Application for an 
Interim Waiver to modify the Department's test procedure for its 
Powermiser line of heat pumps with integrated domestic water heating 
is granted.
    NORDYNE shall be required to test its Powermiser line of heat 
pumps on the basis of the test procedures specified in 10 CFR Part 
430, Subpart B, Appendix M, as modified by additional tests and 
ratings described in its proposed alternate test procedure, to 
determine the performance of the heat pump when it operates for the 
heating of domestic water, either concurrently with or separate from 
the space heating and cooling modes.
    The alternate test procedure is summarized in Attachment A, 
attached hereto.
    This Interim Waiver is based upon the presumed validity of 
statements and all allegations submitted by the company. This 
Interim Waiver may be removed or modified at any time upon a 
determination that the factual basis underlying the application is 
incorrect.
    The Interim Waiver shall remain in effect for a period of 180 
days, or until the Department acts on the Petition for Waiver, 
whichever is sooner, and may be extended for an additional 180-day 
period, if necessary.
      Best regards,
Christine A. Ervin,
Assistant Secretary, Energy Efficiency and Renewable Energy.

Attachment A

Type of Equipment To Be Covered

    The test procedure described herein applies to electrically-driven, 
single-speed compressor air-to-air heat pumps having a nominal cooling 
capacity of 65,000 BTU/Hr or less that include an integral heat 
exchanger and water pump for the heating of domestic water, either 
concurrent with or separate from the space heating and cooling modes.

Test Points and Procedures

    Standard ratings shall be established in accordance with 10 CFR 
Part 430, Subpart B, Appendix M, ``Uniform Test Method for Measuring 
the Energy Consumption of Central Air Conditioners.'' Procedures will 
also be compatible with ``Methods of Testing for Efficiency of Space-
Conditioning Water Heating Appliances that include a Desuperheater 
Water Heater'' ASHRAE Standards Project Committee 137P (under 
development).
    In addition to the standard ratings, tests and a rating procedure 
are described to determine the performance of the heat pump when it 
operates for the heating of domestic water, either concurrently with or 
separate from the space heating and cooling modes.
    Table 1 specifies the operating conditions for all of the tests 
covered by 

[[Page 40360]]
the present test plan, along with their operating and water draw 
schedules as Tables 2, 3 and 4. These tests are summarized as follows:

Space Cooling Mode, Tests 1, 5, 6 and 7

    Test 1 (required) is identical to the Department Test A, Test 5 
(required) is identical to Department Test B, Test 6 (optional) is 
identical to Department Test C, and Test 7 (optional) is identical to 
Department Test D, except for the following: The refrigerant-to-water 
heat exchanger is filled with water. In order to not have the water 
pump cycle on during tests 1 and 5, it may be necessary to disable the 
water pump. If natural convection within the water system proves 
significant, it will be necessary to close an isolation valve between 
the heat pump and the water heater tank.

Space Heating Mode, Tests 11, 12, 13 and 15

    Test 11 (required) is identical to the Department High Temperature 
Test, Test 12 (optional) is identical to the Department Cyclic Test, 
Test 13 (required) is identical to Department Frost Accumulation Test, 
and Test 15 (required) is identical to the Department Low Temperature 
Test, except for the following: the refrigerant-to-water heat exchanger 
is filled with water. In order to not have the water pump cycle on 
during tests 11, 13 and 15, it may be necessary to disable the water 
pump. If natural convection within the water system proves significant, 
it will be necessary to close an isolation valve between the heat pump 
and the water heater tank.

Space Cooling/Domestic Water Heating Mode, Tests 2 and 4

    Test 2 is the Department Test A, combined with water heating. Air 
side conditions are held constant and the system runs continuously, 
while a series of water draws are imposed as outlined in Table 2.
    Test 4 is the Department Test D, which involves cyclic operation of 
the heat pump, with a series of water draws imposed as outlined in 
Table 3.
    The system cyclic schedule is for energizing of the compressor and 
indoor blower control terminal. Actual system operation will be 
controlled by the system internal controls. Depending on internal 
controls, the compressor and one of the system fans may start or 
continue to run irrespective of the compressor terminal being 
energized. There shall be no air flow through the coil with the idle 
fan. When the indoor blower is off, the duct shall be blocked.

Space Heating/Domestic Water Heating Mode, Tests 10 and 14

    Test 10 is the Department Cyclic Test with a series of water draws 
imposed, as outlined in Table 3.
    Test 14 is the Department Low Temperature Test combined with water 
heating. Air side conditions are held constant and the system runs 
continuously, while a series of water draws are imposed, as outlined in 
Table 2.
    The system cyclic schedule is for energizing of the compressor and 
indoor blower control terminal. Actual system operation will be 
controlled by the system internal controls. Depending on internal 
controls, the compressor and one of the system fans may start or 
continue to run irrespective of the compressor terminal being 
energized. There shall be no air flow through the coil with the idle 
fan. When the indoor blower is off, the duct shall be blocked.

Domestic Water Heating Modes, Tests 3, 8 and 9

    Tests 3, 8 and 9 involve cyclic operation of the heat pump in self-
controlled response to a series of water draws, as outlined in Table 4.
    Test 3 (required) uses the same conditions as the Department Test 
D, and will result in a cooling effect on the indoor room.
    The conditions of Tests 8 and 9 (both required) are specified in 
Table 1. Their temperatures do not correspond to any Department tests, 
but, with the exception of the temperatures specified in Table 1, they 
shall follow the requirements of Department Test D.
    Tests 8 and 9 will result in a cooling effect on the outdoor room 
(``O'' terminal de-energized). When the indoor blower is off, the 
ductwork shall be blocked.
    In addition to the normal components required for indoor space 
heating and cooling, the unit shall be connected, as specified by the 
heat pump manufacturer, to a conventional electric domestic hot water 
storage tank. The hot water storage tank shall have a nominal rated 
volume of 52 gallons, with an actual internal volume of 471 
gallons. The hot water storage tank shall have an Energy Factor (EF) 
rating that is within .02 of the EF specified as the 
Federal Energy Conservation Standard for 52 gallon electric water 
heaters, (presently 0.87), as determined by the Department test and 
rating standards, contain two electric heater elements each rated at 
nominal 4500 Watts and be connected to a source of supply water having 
a temperature of 582  deg.F. The electrical voltage 
supplied to the water heater shall be adjusted such that the measured 
electrical power input is 427575W when the lower resistive 
element is heating water. The water heater instrumentation: six 
internal thermocouples plus entering and leaving water temperature 
measurements and energy use, is to be installed according to the 
standard Department test and rating procedure. The water heater 
thermostats are to be replaced with manual controls operated to turn 
off the upper element at 135  deg.F and on at 115  deg.F based on the 
internal thermocouple located closest to the upper thermostat location. 
The lower element shall be operated, as specified by the heat pump 
manufacturer, but to turn off and on at not lower than 110  deg.F and 
100  deg.F respectively (unless a new thermostat is supplied 
specifically for the purpose) based on the internal thermocouple 
located closest to the lower thermostat. The lower element shall also 
be controlled to not operate coincident with the upper element. The 
purpose of the manual controls is to simulate the normal thermostats, 
but with improved repeatability. The heat pump system shall be 
installed per the manufacturers installation instructions. Unless 
otherwise specified by the manufacturer, the water heater is to be 
installed in the indoor room, as is the compressor section, if it is 
separate from the outdoor unit. The water heater is to be connected to 
the compressor section with 15 feet of interconnecting tubing (30 feet 
total for two lines), insulated (both) with R4 insulation. The 
refrigerant sections are to be connected with a total of 25 feet of \3/
4\'' insulated vapor line and 25 feet of \3/8\'' uninsulated liquid 
line. The line lengths between the compressor section and the indoor 
coil shall be between 5 and 10 feet, with the balance of the 25 feet 
connected between the compressor section and the outdoor unit, with 10 
feet located in the outdoor room.

Calculation of Seasonal Performance Factors

    The overall performance of the integrated heat pump system shall be 
expressed in terms of seasonal performances. In addition to the 
Seasonal Energy Efficiency Ratio (SEER) and Heating Seasonal 
Performance Factor (HSPF) currently required by the Department, a 
Combined Cooling Performance Factor (CCPF) shall be calculated for the 
cooling season and a Combined Heating Performance Factor (CHPF) shall 
be calculated for the heating season. These two combined performance 
factors reflect the energy efficiency of the heat pump when providing 
both space conditioning and 

[[Page 40361]]
domestic water heating. The CCPF reflects the system's performance 
during the portion of the year that the outdoor air temperature is 
above 65  deg.F and the system will be providing space cooling and/or 
water heating. CHPF deals with the other portion of the year when the 
outdoor air temperature is below 65  deg.F and the system will be 
providing space heating and/or water heating. Both combined performance 
factors shall be calculated by means of a bin analysis as used for 
calculating the Heating Seasonal Performance Factor as described in 10 
CFR Part 430, Subpart B, Appendix M, para. 5.2. The only changes to the 
actual referenced bin analysis are to extend it to account for the 
water heating functions, and to have it reflect calendar hours in 
addition to cooling and heating load hours, so that the water heating 
load can be fully accounted for.
    The Seasonal Energy Efficiency Ratio (SEER) shall also be 
calculated by means of the bin analysis used for the Heating Seasonal 
Performance Factor, the CCPF and the CHPF. This is a slight departure 
from the referenced procedures method for calculating a SEER for units 
with single-speed compressors, but yields a nearly identical result and 
provides a directly comparable base for use in determining energy 
savings associated with water heating.
    The Heating Seasonal Performance Factor (HSPF) shall also be 
calculated in the manner referenced above, with the exception that it 
is based on seasonal hours as opposed to fractional hours.
    The Combined Cooling Performance Factor (CCPF) shall be calculated 
using the same general approach as presented in the Department/ARI/
ASHRAE standards for non-water-heating equipment. The procedure relates 
the space cooling and water heating loads and the performance of the 
heat pump to outdoor air temperature. The output of the heat pump is 
balanced against the building and water heating load at each outdoor 
temperature bin above 65  deg.F to determine: (a) The fractional heat 
pump operating time spent in each temperature bin performing space 
cooling only; (b) the fractional heat pump operating time spent in each 
temperature bin performing combined space cooling and water heating; 
(c) the fractional heat pump operating time spent in each temperature 
bin performing dedicated water heating; and (d) the heat pump energy 
consumption rate for each mode of operation for each temperature bin.
    The energy input to the domestic water is assumed to be distributed 
by temperature bin in proportion to the total hours of occurrence per 
bin. The performance of the heat pump by bin, and by mode of operation, 
is based on interpolation of test data taken at representative 
operating conditions. The total energy consumption of the heat pump 
will be increased as a result of the domestic water heating load. There 
will, however, be a net energy savings, which is expressed in terms of 
a Combined Cooling Performance Factor for space cooling and water 
heating, designated CCPF. CCPF is the sum of the total space cooling 
load and the total domestic water heating load during the cooling 
season, divided by the sum of the total energy consumption used for 
space cooling and water heating over the same period, expressed in Btu/
Wh.
    The Combined Cooling Performance Factor for space cooling and water 
heating shall be calculated similarly to the SEER:
[GRAPHIC][TIFF OMITTED]TN08AU95.000

    The terms Q(Tj) and E(Tj) are the system energy outputs and inputs 
respectively for the jth outdoor temperature bin as defined in the 
cited Department regulations, and are composed of the various building 
and water heating loads and system energy inputs as follows:
[GRAPHIC][TIFF OMITTED]TN08AU95.001

Where BL(Tj) is the building space cooling load at the jth outdoor 
bin temperature. Qhw(Tj) is the water heating load in Btu/hr 
at the jth outdoor bin temperature and is calculated from the hot 
water drawn from the water heater tank. It does not include the tank 
standby losses. The term ndwcj is the number of extra hours for 
dedicated water heating with the outdoor temperature above 65  deg.F, 
distributed among the first three outdoor temperature bins inversely 
proportional to the building load. In equation form:
[GRAPHIC][TIFF OMITTED]TN08AU95.002

where Ndwc is the number of extra hours for dedicated water 
heating with the outdoor temperature above 65  deg.F. E(Tj) is the 
total system energy input for the jth outdoor bin temperature, and 
is made up of the individual energy inputs for the applicable operating 
modes as follows:
[GRAPHIC][TIFF OMITTED]TN08AU95.003

where:


[[Page 40362]]

Ec(Tj) = Heat pump steady-state power input in the space 
cooling only mode for outdoor temperature bin j.
Eccw(Tj) = Heat pump steady-state power input in the combined 
cooling and water heating mode for outdoor temperature bin j.
Ewdc(Tj) = Heat pump steady-state power input in the 
dedicated water heating mode during the cooling season for outdoor 
temperature bin j.
Eauxw = Auxiliary energy input for water heating.
Esav = Energy saved due to cooling effect during dedicated water 
heating.
Edwehc = Energy input for water heating during the dedicated water 
heating extra hours period above 65  deg.F.
X1(Tj) = Load factor for space conditioning only mode for outdoor 
temperature bin j.
X2(Tj) = Load factor for combined space conditioning/water heating 
mode for outdoor temperature bin j.
X3(Tj) = Load factor for dedicated water heating mode for outdoor 
temperature bin j.
PLF(Tj) = 1 - Cd  x  (1-X1(Tj)  x  X2(Tj) 
- X3(Tj)) = the overall part-load factor for outdoor 
temperature bin j.
Cd = the coefficient of cyclic degradation for cooling.
nj = the number of hours in the jth outdoor temperature bin.

    The steady-state electrical power input to the heat pump in the 
space cooling only mode is determined according to:
[GRAPHIC][TIFF OMITTED]TN08AU95.004

    The steady-state heat pump space cooling capacity in the space 
cooling only mode is determined according to:
[GRAPHIC][TIFF OMITTED]TN08AU95.005

    The steady-state heat pump space cooling capacity and water heating 
capacity in the combined cooling/water heating mode is determined 
according to:
[GRAPHIC][TIFF OMITTED]TN08AU95.006

    The total steady-state electrical power input to the heat pump in 
the combined cooling/water heating mode is determined according to:
[GRAPHIC][TIFF OMITTED]TN08AU95.007

where:

[GRAPHIC][TIFF OMITTED]TN08AU95.008

with:

Cd = the cooling season coefficient of cyclic degradation.
LF(Test 4) = 0.5 = the load factor during the 82  deg.F combined 
cooling/water heating cyclic test.

    The electrical power input to the heat pump at the 82 deg.F cyclic 
test point is corrected (decreased) by the actual test part load factor 
(PLF) in order to make it consistent with the 95 deg.F test point which 
is steady-state. Later bin analysis of energy use will interpolate 
between the 82 deg.F and 95 deg.F points and have the energy use for 
each bin increased by that bins' calculated PLF. This approach of the 
95 deg.F test being continuous compressor operation and the 82 deg.F 
test being cyclic is most representative of actual field operation and 
provides the most representative water side conditions.
    The steady-state heat pump water heating capacity in the dedicated 
water heating mode during the cooling season is determined according 
to:
[GRAPHIC][TIFF OMITTED]TN08AU95.009

    The steady-state electrical power input to the heat pump in the 
dedicated water heating mode during the cooling season is determined 
according to:
[GRAPHIC][TIFF OMITTED]TN08AU95.010


[[Page 40363]]

    The performance of the heat pump in dedicated water heating during 
the cooling season is assumed constant because the heat source is the 
constant temperature indoor air. Because the test is cyclic, the actual 
test results are again corrected from the PLF of the test to the PLF of 
each temperature bin in the analysis.
[GRAPHIC][TIFF OMITTED]TN08AU95.011

with:

Cd=the cooling season coefficient of cyclic degradation.
ton82 deg.F=the total compressor on time during the 82 deg.F 
dedicated water heating cyclic test.
ttotal82 deg.F=the total time to conclusion of the 82 deg.F 
dedicated water heating cyclic test.
    The load factors for each mode of operation are determined as 
follows:
[GRAPHIC][TIFF OMITTED]TN08AU95.012

    Following determination of X2(Tj),X1(Tj) and X3(Tj) 
are determined as follows:
[GRAPHIC][TIFF OMITTED]TN08AU95.013

    The auxiliary energy input for water heating is then determined 
from:
[GRAPHIC][TIFF OMITTED]TN08AU95.014

    Because the dedicated water heating mode during the cooling season 
removes heat from the space, there is a beneficial cooling effect. The 
energy saved by this cooling is calculated as:
[GRAPHIC][TIFF OMITTED]TN08AU95.015

    Lastly, the energy input for water heating during the dedicated 
water heating extra hours period above 65 deg.F is calculated as:

[[Page 40364]]
[GRAPHIC][TIFF OMITTED]TN08AU95.016


where:
[GRAPHIC][TIFF OMITTED]TN08AU95.017

=Load factor for dedicated water heating mode for outdoor temperature 
bin j.
Ewdc(Tj)=heat pump steady-state power input in the dedicated 
water heating mode during the cooling season for outdoor temperature 
bin j.
ndwcj=the number of hours in the jth outdoor temperature bin for 
the dedicated water heating extra hours period above 65 deg.F.
PLF(Tj)=1-Cd x (1-X4(Tj))=the part-load factor for 
outdoor temperature bin j.
Cd=the coefficient of cyclic degradation for cooling.
[GRAPHIC][TIFF OMITTED]TN08AU95.018

=the auxiliary energy input for water heating during the extra hours 
period above 65 deg.F.
Qwdc(Tj)=the cyclic heat pump water heating capacity in the 
dedicated water heating mode during the cooling season.

    The Combined Heating Performance Factor (CHPF) shall be calculated 
utilizing the same approach as for the CCPF. For the CHPF the building 
and water heating loads and heat pump performance are evaluated at each 
outdoor temperature bin below 65 deg.F. CHPF is the sum of the total 
space heating load and the domestic water heating load during the 
heating season, divided by the sum of the total energy consumption used 
for space heating and water heating over the same period, expressed in 
Btu/Wh.
    The Combined Heating Performance Factor for space heating and water 
heating is calculated as follows:
[GRAPHIC][TIFF OMITTED]TN08AU95.019

    The terms Q(Tj) and E(Tj) are the system energy outputs 
and inputs, respectively, for the jth outdoor temperature bin as 
defined in the cited Department regulations and are composed of the 
various building and water heating loads and system energy inputs as 
follows:
[GRAPHIC][TIFF OMITTED]TN08AU95.020

where BL(Tj) is the building space heating load at the jth outdoor 
bin temperature and evaluated for each heating temperature bin Tj, as 
described in subsection 10.2.2 of ASHRAE Standard 116-83.

Qhw(Tj) is the water heating load for the jth outdoor bin 
temperature.
    E(Tj) is the total system energy input for the jth 
outdoor bin temperature and is made up of the individual energy inputs 
for the applicable operating modes as follows:
[GRAPHIC][TIFF OMITTED]TN08AU95.021

where:

Eh(Tj) = Heat pump steady-state power input in the space 
heating only mode for outdoor temperature bin j.
Ehcw(Tj) = Heat pump steady-state power input in the combined 
space heating and water heating mode for outdoor temperature bin j.
Ewdh(Tj) = Heat pump steady-state power input in the 
dedicated water heating mode during the heating season for outdoor 
temperature bin j.
Eauxw = Auxiliary energy input for water heating.
Eauxs = Auxiliary energy input for space heating.
Edwehh = Energy input for water heating during the dedicated water 
heating extra hours period below 65  deg.F
X1(Tj) = Load factor for space conditioning only mode for outdoor 
temperature bin j.
X2(Tj) = Load factor for combined space conditioning/water heating 
mode for outdoor temperature bin j.
X3(Tj) = Load factor for dedicated water heating mode for outdoor 
temperature bin j. 

[[Page 40365]]

PLF(Tj) = 1 - Cd  x  (1 - X1(Tj) - X2(Tj) 
- X3(Tj)) = the overall part-load factor for outdoor 
temperature bin j.
Cd = the coefficient of cyclic degradation for heating.
nj = the number of hours in the jth outdoor temperature bin.

    The steady-state heat pump space heating capacity in the space 
heating only mode is determined according to:
[GRAPHIC][TIFF OMITTED]TN08AU95.022

    The steady-state electrical power input to the heat pump in the 
space heating only mode is determined according to:
[GRAPHIC][TIFF OMITTED]TN08AU95.023

    The steady-state heat pump space heating capacity and water heating 
capacity in the combined heating/water heating mode is determined 
according to:
[GRAPHIC][TIFF OMITTED]TN08AU95.024

[GRAPHIC][TIFF OMITTED]TN08AU95.025

Where:
[GRAPHIC][TIFF OMITTED]TN08AU95.026

and:
[GRAPHIC][TIFF OMITTED]TN08AU95.027

    The total steady-state electrical power input to the heat pump in 
the combined heating/waterheating mode is determined according to:
[GRAPHIC][TIFF OMITTED]TN08AU95.028


[[Page 40366]]

where:
[GRAPHIC][TIFF OMITTED]TN08AU95.029

and:

PLF (Test10) = 1 - (Cd  x  (1 - LF (Test10)))

With:

Cd = the heating season cyclic degradation coefficient.
LF (Test 10) = 0.5 = the load factor during the 47  deg.F combined 
heating/water heating cyclic test.

    The electrical power input to the heat pump at the 47  deg.F cyclic 
test point is corrected (decreased) by the actual test part load factor 
(PLF) in order to make it consistent with the 17  deg.F test point 
which is steady-state.
    Later bin analysis of energy use will interpolate between the 17 
deg.F and 47  deg.F points and have the energy use for each bin 
increased by that bins calculated PLF. This approach of the 17  deg.F 
test being continuous compressor operation and the 47  deg.F test being 
cyclic is most representative of actual field operation and provides 
the most representative water side conditions.
    The cyclic heat pump water heating capacity in the dedicated water 
heating mode during the heating season is determined according to:
[GRAPHIC][TIFF OMITTED]TN08AU95.030

    The steady-state electrical power input to the heat pump in the 
dedicated water heating mode during the heating season is determined 
according to:
[GRAPHIC][TIFF OMITTED]TN08AU95.031

    Because the tests are cyclic, the actual test results are again 
corrected from the PLF of the specific test to the PLF of each 
temperature bin in the analysis, where:
[GRAPHIC][TIFF OMITTED]TN08AU95.032

with:

Cd = the heating season cyclic degradation coefficient.
ton47  deg.F = the total compressor on time during the 47  deg.F 
dedicated water heating cyclic test.
ttotal47  deg.F = the total time to conclusion of the 47  deg.F 
dedicated water heating cyclic test.
ton67  deg.F = the total compressor on time during the 67  deg.F 
dedicated water heating cyclic test.
ttotal67  deg.F = the total time to conclusion of the 67  deg.F 
dedicated water heating cyclic test.

    The load factors for each mode of operation are determined as 
follows:
      
    [GRAPHIC][TIFF OMITTED]TN08AU95.033
    
or

[[Page 40367]]
[GRAPHIC][TIFF OMITTED]TN08AU95.034


    Following determination of X2(Tj), X1(Tj) and 
X3(Tj) are determined as follows:
[GRAPHIC][TIFF OMITTED]TN08AU95.035

[GRAPHIC][TIFF OMITTED]TN08AU95.036

    The auxiliary energy input for water heating is then determined 
from:
[GRAPHIC][TIFF OMITTED]TN08AU95.037

    The auxiliary energy input for space heating is then determined 
from:
[GRAPHIC][TIFF OMITTED]TN08AU95.038

    Lastly, the energy input for water heating during the dedicated 
water heating extra hours period below 65  deg.F is calculated as:
[GRAPHIC][TIFF OMITTED]TN08AU95.039

where:
[GRAPHIC][TIFF OMITTED]TN08AU95.040

= Load factor for dedicated water heating mode for outdoor temperature 
bin j.
Ewdh(Tj) = heat pump steady-state power input in the 
dedicated water heating mode during the heating season for outdoor 
temperature bin j.
ndwhj = the number of hours in the jth outdoor temperature 
bin for the dedicated water heating extra hours period below 65  deg.F.
PLF(T) = 1 - Cd  x  (1 - X4(Tj)) = the part-load factor 
for outdoor temperature bin j.
Cd = the heating season cyclic degradation coefficient.
[GRAPHIC][TIFF OMITTED]TN08AU95.041


[[Page 40368]]

= the auxiliary energy input for water heating during the extra hours 
period below 65  deg.F.
Qwdh(Tj) = the cyclic heat pump water heating capacity in the 
dedicated water heating mode during the heating season.

                                                Table 1.--Test Summary--Integrated Heat Pump System Tests                                               
--------------------------------------------------------------------------------------------------------------------------------------------------------
                                                                                         Air temperatures (F)                                   Data    
  Test         Description             Test type                             --------------------------------------------    Water draw       reduction 
                                                                                 ODDB       ODWB       IDDB       IDWB                          notes   
--------------------------------------------------------------------------------------------------------------------------------------------------------
1.......  COOLING..............  STEADY-STATE.........  REQUIRED............         95  .........         80         67  ................            1 
2.......  COOLING + WH.........  STEADY-STATE.........  REQUIRED............         95  .........         80         67  TABLE 2.........      1,2,3,6 
3.......  WH (COOLING).........  CYCLIC...............  REQUIRED............         82  .........         80         67  TABLE 4.........      1,2,5,6 
4.......  COOLING + WH.........  CYCLIC...............  REQUIRED............         82  .........         80         67  TABLE 3.........      1,2,4,6 
5.......  COOLING..............  STEADY-STATE.........  REQUIRED............         82  .........         80         67  ................            1 
6.......  COOLING..............  STEADY-STATE.........  OPTIONAL............         82  .........         80         57  ................            1 
7.......  COOLING CYCLIC.......  CYCLIC...............  OPTIONAL............         82  .........         80         57  ................            1 
8.......  WH (HEATING).........  CYCLIC...............  REQUIRED............         67         61         70  .........  TABLE 4.........        1,2,7 
9.......  WH (HEATING).........  CYCLIC...............  REQUIRED............         47         43         70  .........  TABLE 4.........        1,2,7 
10......  HEATING + WH.........  CYCLIC...............  REQUIRED............         47         43         70  .........  TABLE 3.........      1,2,4,6 
11......  HEATING..............  STEADY-STATE.........  REQUIRED............         47         43         70  .........  ................            1 
12......  HEATING CYCLIC.......  CYCLIC...............  OPTIONAL............         47         43         70                                           
13......  HEATING DEFROST......  STEADY-STATE.........  REQUIRED............         35         33         70  .........  ................            1 
14......  HEATING + WH.........  STEADY-STATE.........  REQUIRED............         17         15         70  .........  TABLE 2.........      1,2,3,6 
15......  HEATING..............  STEADY-STATE.........  REQUIRED............         17         15         70  .........  ................            1 
--------------------------------------------------------------------------------------------------------------------------------------------------------

Data Reduction Notes for Table 1

    1. Data recorded per ASHRAE Standard 116-83.
    2. Water heating capacity is calculated as the net water energy 
withdrawn plus the tank standby loss during the test duration, divided 
by the length of time that the water pump and/or auxiliary water heater 
elements operate and expressed as BTU/hr. Test duration is defined as 
starting at t=0 and ending at the conclusion of water heating from all 
sources. Makeup and supply water temperatures are to be recorded every 
5 seconds during water draws.
    3. The steady-state cooling or heating capacity coincident with 
water heating is calculated as the total air side capacity delivered 
during the period of time that the water pump and/or auxiliary water 
heater elements operate, divided by the length of time that the water 
pump and/or auxiliary water heater elements operate and expressed as 
BTU/hr.
    4. The cyclic cooling or heating capacity coincident with water 
heating is calculated as the air side capacity delivered during the 
period of time that both the water pump and indoor blower and/or both 
the auxiliary water heater elements and indoor blower operate, divided 
by the length of time that both the water pump and indoor blower and/or 
both the auxiliary water heater elements and indoor blower operate and 
expressed as Btu/hr.
    5. The cyclic cooling capacity associated with dedicated water 
heating is calculated as the air side capacity delivered during the 
period of time that the indoor blower operates, divided by the length 
of time that the indoor blower operates, and expressed as Btu/hr.
    6. The power used with the cooling or heating capacity associated 
with water heating is calculated as the total energy consumed by all 
components, including the heat pump, water pump, and auxiliary water 
heater elements, etc., during the length of time that the air side 
capacity is integrated, divided by the same length of time, and 
expressed as Watts.
    7. The power used with the dedicated water heating capacity is 
calculated as the total energy consumed by all components, including 
the heat pump, water pump, and auxiliary water heater elements, etc., 
during the duration of the test, divided by the period of time used in 
determining the associated water heating capacity determination.

     Table 2.--Steady-State Combined Operation & Water Draw Schedule    
------------------------------------------------------------------------
    Sequence                                                            
------------------------------------------------------------------------
1...............  FILL WATER HEATER (or draw until both upper and lower 
                   thermostat water temperatures are below their turn on
                   points).                                             
2...............  RESISTIVE OPERATION TO CONCLUSION.                    
3...............  HEAT PUMP OPERATION TO CONCLUSION OF WATER HEATING    
                   (heat pump continues to operate in space conditioning
                   mode).                                               
4...............  CONDITION WITH 11 GALLON DRAW.                        
5...............  HEAT PUMP AND/OR RESISTIVE OPERATION TO CONCLUSION OF 
                   WATER HEATING.                                       
6...............  HEAT PUMP CONTINUES TO OPERATE IN SPACE CONDITIONING  
                   MODE FOR 10 MINUTES.                                 
7...............  t=0 , DRAW 5.4 GALLONS.                               

[[Page 40369]]
                                                                        
8...............  HEAT PUMP AND RESISTIVE OPERATE ON INTERNAL CONTROLS  
                   (heat pump continues to operate in space conditioning
                   mode).                                               
9...............  t=68 MINUTES, DRAW 16.1 GALLONS.                      
10..............  HEAT PUMP AND RESISTIVE OPERATE ON INTERNAL CONTROLS  
                   (heat pump continues to operate in space conditioning
                   mode).                                               
11..............  t=118 MINUTES, DRAW 10.7 GALLONS.                     
12..............  HEAT PUMP AND RESISTIVE OPERATE ON INTERNAL CONTROLS  
                   TO CONCLUSION OF WATER HEATING.                      
------------------------------------------------------------------------



        Table 3.--Cyclic Combined Operation & Water Draw Schedule       
------------------------------------------------------------------------
    Sequence                                                            
------------------------------------------------------------------------
1...............  FILL WATER HEATER (or draw until both upper and lower 
                   thermostat water temperatures are below their turn on
                   points).                                             
2...............  RESISTIVE OPERATION TO CONCLUSION.                    
3...............  HEAT PUMP OPERATION TO CONCLUSION OF WATER HEATING.   
4...............  CONDITION WITH 11 GALLON DRAW.                        
5...............  HEAT PUMP AND/OR RESISTIVE OPERATION TO CONCLUSION OF 
                   WATER HEATING.                                       
6...............  COMPRESSOR OFF FOR 10 MINUTES.                        
7...............  t=0 , DRAW 5.4 GALLONS.                               
8...............  t=10 MINUTES, Tstat ON; @ t=20 MINUTES, Tstat OFF.    
9...............  t=30 MINUTES, Tstat ON; @ t=40 MINUTES, Tstat OFF.    
10..............  t=50 MINUTES, Tstat ON; @ t=60 MINUTES, Tstat OFF.    
11..............  t=68 MINUTES, DRAW 16.1 GALLONS.                      
12..............  t=70 MINUTES, Tstat ON; @ t=80 MINUTES, Tstat OFF.    
13..............  t=90 MINUTES, Tstat ON; @ t=100 MINUTES, Tstat OFF.   
14..............  t=110 MINUTES, Tstat ON.                              
15..............  t=118 MINUTES, DRAW 10.7 GALLONS.                     
16..............  t=120 MINUTES, Tstat OFF.                             
17..............  t=130 MINUTES, Tstat ON; @ t=140 MINUTES, Tstat OFF.  
18..............  t=150 MINUTES, Tstat ON; @ t=160 MINUTES, Tstat OFF.  
19..............  t=170 MINUTES, Tstat ON TO CONCLUSION OF WATER        
                   HEATING.                                             
------------------------------------------------------------------------
Note: Tstat refers to indoor space thermostat.                          


    Table 4.--Dedicated Water Heating Operation & Water Draw Schedule   
------------------------------------------------------------------------
    Sequence                                                            
------------------------------------------------------------------------
1...............  FILL WATER HEATER (or draw until both upper and lower 
                   thermostat water temperatures are below their turn on
                   points).                                             
2...............  RESISTIVE OPERATION TO CONCLUSION.                    
3...............  HEAT PUMP OPERATION TO CONCLUSION OF WATER HEATING.   
4...............  CONDITION WITH 11 GALLON DRAW.                        
5...............  HEAT PUMP AND/OR RESISTIVE OPERATION TO CONCLUSION OF 
                   WATER HEATING.                                       
6...............  COMPRESSOR OFF FOR 10 MINUTES.                        
7...............  t=0 , DRAW 5.4 GALLONS.                               
8...............  HEAT PUMP AND RESISTIVE OPERATE ON INTERNAL CONTROLS. 
9...............  t=68 MINUTES, DRAW 16.1 GALLONS.                      
10..............  HEAT PUMP AND RESISTIVE OPERATE ON INTERNAL CONTROLS. 
11..............  t=118 MINUTES, DRAW 10.7 GALLONS.                     
12..............  HEAT PUMP AND RESISTIVE OPERATE ON INTERNAL CONTROLS  
                   TO CONCLUSION OF WATER HEATING.                      
------------------------------------------------------------------------

January 24, 1995.
The Assistant Secretary for Conservation and Renewable Energy,
United States Department of Energy, 1000 Independence Avenue, S.W., 
Washington, DC 20585.

Subject: Petition For Waiver and Application for Interim Waiver.

    Gentlemen: This is a Petition for Waiver and Application for 
Interim Waiver submitted pursuant to Title 10 CFR 430.27, as amended 
November 14, 1986. Waiver is requested from the existing Test Method 
for Measuring the Energy Consumption of Central Air Conditioners, 
including heat pumps as found in Appendix M to Subpart B of Part 
430.
    Under the existing Test Procedure, heat pump energy consumption 
is measured relative only to space heating and cooling. NORDYNE 
requests a waiver to the existing test procedure as detailed in the 
attached ``Requested Test and Rating Procedure Modifications for 
Electrically Driven, Single-Speed Compressor, Air-to-Air Heat Pumps 
With Integrated Water Heating'', for use in the testing and rating 
of its Powermiser line of heat pumps which include special design 
characteristics to incorporate domestic water heating.
    The current test procedure clearly cannot account for the energy 
savings associated with integrated water heating.
    NORDYNE is confident that a waiver will be granted and requests 
that an interim waiver be granted. NORDYNE's confidence is based on:
    (1) The current test procedure does not account for the total 
energy savings of the Powermiser.
    (2) Carrier Corporation has been granted a similar waiver for 
its Hydrotech product.
    (3) For public policy, the widespread use of this type of 
integrated appliance would be in direct support of the President's 
Climate Change Action Plan, which lists heating and cooling and home 
appliances as key targets for improvement.
    (4) Absent a favorable determination on the Application for 
Interim Waiver, NORDYNE would experience an economic hardship, as 
discussed in the confidential attachment.

[[Page 40370]]

    Known manufacturers of domestically marketed units of the same 
product type are being notified in writing of this Petition for 
Waiver and Application for Interim Waiver. A list of the names and 
addresses of each person to whom a notice is being sent is attached.

      Sincerely,
Wayne Reedy,
Vice President Engineering.

WRR:pdr
Enclosure

[FR Doc. 95-19203 Filed 8-7-95; 8:45 am]
BILLING CODE 6450-01-P