CAS-RM-79-102 COMMENT 04

I 

t 

Office of Conservation and 

Renewable Energy 

[Case No. CAC-001l 

5587 

Energy Conservation Program for 

Consumer Products; Petition for 

Waiver of Central AIr Conditioner Tesl 

Procedures Ff9Jn Carrier Corporation 

AQENCY: Conservation and Renewable 

Energy Office, DOE. 

sUlDlAJn'i Today's notiie publishes a 

"Petition for Waiver" from Carrier 

Corporation (Carrier) of Syracuse. New 

York. requesting a waiver fromthe 

existiIts Department of Energy (DOE) 

test procedures for central air 

conditioners. Carrier manufactures 

residential and commercial air 

conditioning appliances. The petition 

requests DOE to grant relief from the 

test procedure relating to the 

compressor speed specification for 

Carrier's 38EV j38QV model series 

central air conditioners (heat pumps). 

Carrier seeks to test using intermediate 

compressor speeds instead of the single 

. speed specified. Carrier requests the test 

and calculation methods of Appendix B 

to the Air Conditioning and 

Refrigeration Institute Standard 210/ 

24G--84. with modifications. be 

substituted for the DOE test procedures 

for central air conditioners. DOE is 

soliciting comments. data. and 

information respecting the petition. 

DATE: DOE will accept comments. data 

and information not later than ~ch 17. 

1986. 

ADDRESSES: Written comments and 

statements shall be sent to Michael 

McCabe at the address indicated in the 

next section. Please label both the 

envetope and the comment with the 

following; Case No. CAC-001. 

FOR FURTHER INFORMATION CONTACT: 

Michael J. McCabe. U.s. Department of 

Energy, Office of Conservation and 

Renewable Energy, Mail Station. CE132, Forrestal Building, 1000 

Independence Avenue. Washington. 

DC 20585. (202) 252-9127 

Eugene Margolis. Esq .• U.S. Department 

of Energy. Office of General Counsel. 

Mail Station, GC-12. Forrestal 

Building. 1000 Independence Avenue. 

SW., Washington, DC 20585. {202} 

252-9513. 

Background 

The Energy Conservation Program for 

Consumer Products {other than 

automobiles) was established pursuant 

to the Energy Policy and Conservation 

Act {EPCA). Pub. L. 94-163. 89 Stat. 917. as amended by the National Energy 

Conservation Policy Act [NECPA). Pub. 
CAS-RM-79-102 COMMENT 04

5588 Federal Register I Vol. 51, No. 31 I Friday, February'14, 1988:/ Notices 

• 95-619, 92 Stat. 3266. which requires 

JE to prescribe standardized test -

procedures to measure the energy 

consumption of certain consumer 

products. including central air 

conditioners. The intent of the test 

procedures is to provide a comparable 

measure of energy consumption that will 

assist consumers in making purchasing 

decisions. These test procedures appear 

at 10 CFR Part 430, Subpart B. 

DOE has amended the prescribed test 

procedures by adding 10 CFR 430.27, 

Petitions for Waiver, to allow the 

Assistant Secretary for Conservation: 

and Renewable Energy temporarily to 

waive test procedures for a particular 

basic model. 45 FR 64108 (September 26, 

1980). Waivers may be granted when 

one or more design characteristics of a 

. basic model either prevent testing of the 

basic model according to the prescribed 

test procedures, or lead to results so 

unrepresentative of the model's true 

energy consumption as to provide 

materially inaccurate comparative data. 

Waivers generally remain in effect until 

final test procedure amendments 

become effective, resolving the pl'oblem 

that is the subject of the waiver. 

Carrier's petition seeks a waiver from 

the DOE test provisions that require . 

·~'1ting at a single compressor speed. 

tead. Carrier requests the allowance 

01 test and calculation procedures which 

incorporate test data for system 

operation at intermediate speeds. 

Specifically. Carrier requests allowance 

to use Appendix B of the Air 

Conditioning and Refrigeration Institute 

(ARl) Standard 210/240-&4 with 

amendments. The amendments to ARI 

Standard 210/240-&4 requested by 

Carrier include revisions to cycling 

per-iod. intermediate steady state test 

points. demand defrost credit and 

indoor air flow rate. 

Pursuant to paragraph (b) of 10 CFR 

430.27, DOE is hereby publishing the 

"Petition for Waiver" in its entirety. The 

petition contains no confidential 

information. DOE solicits comments. 

data, and information respecting the 

petition. 

Issued in Washing(on, DC, January 31. 

1986. 

Donna R. Fitzpatrick. 

Assistant Secretary. Conservation and 

Renewable Energy. 

December 4. 1985. 

Assistance Secretary for Conservation and 

Renewable Energy, 

United States Department of Energy. 1()()(} 

Independence Avenue. Sw., Washington. 

DC 20585 

.letition for Waiver ~entleman: This is a petition for waiver 

which is being submitted pursuant to Title 10 

CFR 430.27 .. Waiver is requested from Test 

• 

PIvcedures for Central Air Conditioners. . Including Heat Pumps found in Appendix M 

to Subpart B of Part 430. Waiver is requested 

for variable speed pl'Qduct model heat pumps 

and cooling units.. .. Models in the variable speed product line 

employ variable speed motors to drive the 

compressor and the indoor blower. The ' 

motors are controlled by a microprocessor 

and can be operated over a wide range of 

incremental values of speed. An "intelligent" room thermostat is linked to the 

microprocessor controller in the equipment 

The cycling of the compressor is controlled 

from within the unit rather than directly by 

the thermostat. which leads to significantly 

different cyclic patterns when compared to 

conventional single or two speed equipment 

seasonal efficiency ratings by 3% for cooling 

and '2% for heating. Test data are available to 

support these efficiency rating improvements. 

This change in the cyclic test pattem is 

reqUired to correctly acco~t for the ' . 

improved cyclic performance of the variable 

speed equipment. _ ' ' 

York demonstrated in the Application for 

Exception for their ENMOD system (Case 

8EE-1338, January 13, 1981) that the test, 

procedures for two speed systems in 430.24 

do not properly represent the seasonal 

performance of variable capacity systems. 

York was allowed· to make use of a modified 

test and rating procedure which incorPorated' 

test data for system operation at intermediate 

speeds. Since then, ARI has published a 

rating procedure for air conditinners with 

variable speed compressors in Appendix B of 

ARI Standard 12O/240-84._The ARI rating, 

procedure is very similar to the method york 

was allowed to use in rating the ENMOD 

system, and a high level of consistency is 

maintained between ARI 210/240-&1 and 

430.24. 

This petition is a'request for authorizatipn 

to substitute the test and calculation methods. 

in Appendix 8 of Standard 210/240-84 for the 

test and calculation methods in Appendix M 

to Subpart of Part 43(}; In addition, it is 

requested that several modifications to 

Appendix B of 210/240-84 be included in the 

waiver to allow fair and proper . 

representation of the unique operating 

characteristics of the equipment. The 

requested amendments are modifications are as follows: 

1. It is requested that.the cyclic test pattern 

of 6 minutes "on" and 24 minutes "off" for . 

compressor operation during the cyclic 

heating and cyclic cooling tests be replaced 

by a test pattern of 12 minutes "on" and 48. 

minutes "ofr' for compressor operation (ARI 

Standard 210/240-84, AppendixB. Table 81; 

page 15. footnote 4). 

It is further requested that the capacity 

integration period be changed from 8 minu~es 

to 14 minutes (ARI Standard 210/240-84; . 

Section 5.1.3.1). The microprpcessor control,' 

of the equipment has a minimumrnn time.of . 12 minutes at the minimum speed, and Rbi:·'· 

not possible for an "on" perio'd of·leslt.thq'.,.. 

minutes to occur in normal operation of tlllie'-

equipment Since the capacity of the "ariab\t.: 

speed equipment at minimum speed is ..... ' .. 

approximately half that of a conventional. ; 

single speed-unit, a minimUm rnn-time ~U 

minutes has theeffeet ofmamlaining;the;·;; 

same magnitude of interior temp~wre .. ,('lr' ; . 

fluctuations during cyclic operatioll aS~'.tc~ 

which occur with a single speed unit With .. "" 

minimum rnn time ot 6 minutes. The'effe~lJJ 

changing the cyclic test pattern froni JI ..•• <- ..•. \ 

minutes "on", 24 minutes "ofr·:tol.a.~~:!.[ "on", 48 minutes "ofr'ls to imphWetJiiil ;./~,. 

2. -The Intermediate speed steady state test 

point for cooling is speCified by temperature 

conditions and equipment capacity (ARI 

Standard 210/240-84. Appendix 8, Table 81. 

page 15). This requires an iterative test to 

determine the correct speed for the .,. 

equipment in order to achieve the spe¢ied 

capacity. No tolerances 'are provided, and 

given the discrete nature of speed settings for 

the equipment, it may be impossible to 

exactly match the required capacity. This test 

is nnnecessariiy burdensome. 

It is requested that the test be specified by 

temperature conditions and speed, with the 

temperature conditions nnchanged and the 

speed speCified only as a value between the 

minimum and maximum values for the 

equipment. The capacity and power for this 

intermediate speed point can then be 

corrected with respect to outdoor dry bulb 

temperature using the minimum speed and 

maximUm speed test points to find the 

outdoor temperature at which the equipment 

capacity matches the load line. The 

temperature. capacity and power values for 

this intersection are then used in the ARI 

interpolation equations for determining SEER;: 

The means for correcting the intermediate . 

speed point to de,termine the inttmlection 

with the load line is included lQ! Appendix A 

to this w£!.iver request. . , 

3. Thereis currently no intermediate speed 

test pointfor evaluation of the heating 

seasonal performance factor, As a result. the 

ARI method has been found to underpredict 

the HSPF by as much as 2% when compared 

to more detailed bin calculations 

incorporating intermediate speed data. The 

frost accumulation testpo'int, which-is rnn at 

maximU!l1 speed is not wen matched to the 

load line and as a result has almost no 

influence on the HSPF value fARI Standard 

210{210-84. Appendix B, Table 81, page 15}. 

It is prop.osed that the frost accumulation 

test point be an intermediate speed point. 

The temperature conditions will remain the 

same,but the speed will be specified as a 

value between the minimum and maximum 

speeds for lb. equipment. Thli capacity and 

power fortl¥a lnterme~ate speed point will 

be corrected withre8pectto tem~i'~ture in . tJte same fil!UIDer as the Intermediate speed 

coolins point to find lheinterseC?tion with the~ 

heating ll)ad line. The interpolation procedure 

. for lteilting,will be modifiedlO a~()w the ~8 . 

of an intermediate ap.a polJ),t,in the,.. 

ntilnnerasit is in the.C::00lin8 ~on 

. c41.cula~~. ~ the.t:J:9§til¢CUJIuulltioil 

. tesfpOiptt~an'iJltem'le'dia~~will P~GIJ:._ 

tbeP ... " tnw~·~te'tpoin~~~!.. Will. .. ..a . talive~.··· maa8W-e:of int' ate"'em - .i;:e •. - . •• F •.. · 1lJ.!;... ..I?". unller hi8b fl'Qst Be' . .·~_Standard . 

~tIQf' vide Il iys~J,»'O· .•. :".aruf~ .. ~;sm~, . tU:ul.,tionmem~;._ 

f01lvariab1e"~~5i!, sUQIlt!JnliallY .. • ~ ,<- -.' i.> ~<_, ~~<' ':~':~::i_~;~~~,,~~;" 
CAS-RM-79-102 COMMENT 04 . ' 

", ...... ',R.egister lV1Jl"iil. Nf. 31 I Friday, February 14, 1986 I Notices 

, , .. (. 

5509 

different ~_ffo~~le1lpeed ~t,U)s. il 

is nat app1o'~1:y:lncrease the, " 

capwty.at" ,,') a~Ulaticmt"tbi1'Jb (1PpendixMtO'Su~'B,ofPart4ao. ,;,J, ',' 

section 5.2},.':, ;~,:~, , ,; .'" , " 

n ~ ,regl,leSt~,d that, ~e HSPF be increased 

by4"'direciIy arid that no adjustment be ' 

ma4e to ~frost accumulation t~sfpolnt 

data;''l'biSrequest is bas'ed on comments 

published 1» 44 Federal Register 249 p 76703 

(12/D/zg)-wbich reads: "Although thl.!! 

improvement does vary by region. analysis 

shows that In most areas a 4 percent • 

improvement mthe seasonal performag,ce~ 

factor is the minimum which would be ' ,;;" 

expected .;' • DOE bas adjusted the , 

enhancement faclor •.• In 'order to achieve a 

resultant effect of 4 percent improvement In 

the HSPF for unitawhlch use demand ' 

defrost." 

5. ARI Standard 210/240-84 Appendix B 

references ANSI! ASHRAE Standard 116-

1983 for defInition of test conditions and test 

methods. While Section 8.3 of 116-1983 

prescribes that the Indoor air flow rate is to 

vary In accordance with the control system of 

the unit being tested. there are no instructions 

concerning modificatiOl,ls to the test 

procedures to allow for variation In Indoor 

air flow rate. It is necessary to set both the 

air flow rate and 'the fan speed for 

intermediate fan speeds. 

It is proposed that the airflow rate at fan 

speeds less than the maximum speed be 

determined using the fan laws for a fixed 

resistance system. The air flow rate is then 

given by the ratio..of fan speed to maximum 

fan speed multiplied by air flow rate at 

maximum fan speed. Minimum static 

preSl:iure requirementil~on1y appiywhen.,the 

fan is ruiming at the maximum speed. which, 

will normally occur at the capacity rating point. . , . 

Test data ~re available to support the 

changes in seasonal rating factors cited 

above and to support the use of ARl210/Z46-

84. Appendix B .as a basis for ratinS the 

variable speed equipment. These data are 

confIdential and can be provided on Ute basis 

they are not disclosed outside of the . Department of Energy. . 

It is our understanding that York i8nO ," .: 

longer manufacturing the ENMOD variable . 

speed air conditioner. We.are presently 

unaware of any order manufacturer{s) who 

offer for sale in the United States air 

conditioners which incorporate variable 

speed compressors and blowers in th~lr 

design. 

Sincerely. 

Edward Po. Baily. 

Director Industry Relations. 

Appendix A 

Modifications to ARI210/240-84 AppendixB 

Interpolation Methods .' 

1. Section 2.1. Cooling Seas'on Performance 

Factor. 

Intermediate Speed Performance Point. 

It is necessary to :determlne capacity and 

power as a function of outdoor dry bulb 

temperature for the Intermediate spee~. ' 

These relationships can be written as:. 

QV(T=QV(87}+QSLP'{T-87}, , . \ 

whe~ QV(T) is the capacity at the chosen 

intermediate speed as a function of outdoor . 

dry lll!lb-temperature (T). QV(87) is the 

, i~diate speed capacity point (tested at 

-87,.QVtdE!Cll' ciry,.bulb). and QSLP·is .the 

.?JI{lC;i~t·~rsuiltemperatulJ:l slope given by: 

QSLP:=1-:9wi')'QL(82)-(QL(ll7»)/(82- . 

, .. ' ,87}}+QWT'UQH{95}-QH(82»/(95-82)J 

QWr~{(QV{87}-QL(87»)/QH(87}-QL(87ll 

where Ql:I(9S1 and QH(82) are the .maximum 

iipee'dteilfjroiilt capacities, QL(82) and 

QL(I)7},iire the minimum speed test point 

capacitlell. and QH(87) and QL(87) are the 

maximum and minimum speed capacities 

estimated at 87 outdoor ciry bulb using the 

test.point capacity data. I 

Once (QY(T) has been determined. the 

temp.erature ~here QV{T) and the load line 

intersect can be determined. This 

temperllture. designated TVC. replaces 87 in 

the interpolation equations for Case II in ARl 

210/210-84 Appendix B. The intermediate 

speed point power. EV(87). is replaced by the 

intermediate speed power equation evaluated 

at TVC. The equation for EV(T) is determined 

in the same manner as the equation for 

QV(T) by replacing capacity values with the 

corresponding power values. 

2. Section 2.2. Heating Season Performance 

Factor. 

Intermediate Speed Performance Point. 

It is necessary to determine QV I(T) and 

EV(T) for the intermediate speed in heating. 

These equations are found in the same 

manner as is described above for cooling 

points, but the heating test conditions and 

temperature values are for the heating test 

points. Similarly. the temperature where 

QV(T) and the heating load line intersect, 

TVH; must be determined. The interpolation 

, procedure 'for Case II m.heating must be 

expimded to pennit the use of the 

intermediate speed temperature and power 

value. The form of the exp~ded 

interpolation procedure for .heating is the 

same as Case II in cooling when the 

intermediate speed heating point is used. 

December 13. 1985. 

Assistant Secretary for Conservation and 

Renewable Energy. 

U.S. Deparfment of Energy. 1000 

. Independence A venue • .sw. Washington. ~DC~ . ,- Re: AMENDMENT ']'(j CARRIER 

CORPORATION'S DECEMBER 4. 1985 

PETlTIONFOR WAIVER 

Gentlemen: Carrier Corporation amends its 

Petition for Waiver from DOE Test 

Procedures for ita variable speed air 

cc;mditioners and heat pumps as follows for 

. clarification and specificity:' 

(a) Substitute the following sentence for the 

last sentence in the first paragraph of our 

December 4, 1985 Petition: 

Waiver is requested for Carrier 

. Corporation's 38EV /38QV variable speed 

central air conditioners/heat pumps. 

{b) Amend the fITst sentence of the second 

paragraph to read: 

, .. Models in the 38EV/38QV variaple speed 

product lines employ variable speed motors 

to drive ttIe compressor and the indoor 

blower. 

(c) Inse.rtthe following paragraph between 

the second and third paragraphs of the 

Petition dated December 4,1985: 

The. 38EV/38QV -equipment can be tested 

under the Appendix M procedures but the 

results of such testing are not representative 

of the true efficiency of the equipment. 

Very truly yours, 

Edward A. Baily, 

Directar. Industry Relations. 

[FR Doc. 86-3355 Filed 2-13-86; 6:45 am] 

B1WNG CODE 6450-01 ....