Test Procedures for Clothes Dryers

Notice of Proposed Rulemaking Public Meeting

Stephen WitDepartment of EnergyEnergy Efficiency & R

1 | Test Procedure for Clothes Dryers 

Public Meeting

Email: wes.anderson@

February 6, 2013
Introduction

Steps in the Test Procedure Rulemaking

Fi l na

Rule NOPR

• NOPR published on January 2, 2013• NOPR Public Meeting today, February 6, 2013• Comments on NOPR from interested parties

– Transcript records oral comments from today’s public mee– Written comments (comment period closes March 18, 201

• DOE reviews and considers all comments DOE reviews and considers all comments• Final Rule Publication

2 | Test Procedure for Clothes Dryers 
Introduction

C

Test Procedure Overview and Issues

1. Products overed by the Proposed Amendments

2. Automatic Cycle Termination3. Incorporation by Reference of IEC Standard 62301 (Seco

Edition) for Measuring Standby Mode and Off Mode PoweConsumption

4. Technical Correction to Per-Cycle Combined Total Energ

Consumption Calculation

5. Clarifications to Test Conditions6. Effects of Proposed Test Procedure Revisions on Compl

Standards

7. Compliance with Other EPCA Requirements

3 | Test Procedure for Clothes Dryers 
Introduction

• Test Procedure Final Rule. 42 FR 46145, Sept. 14, 1977.

Regulatory History

– Established clothes dryer test procedure in 10 CFR part 4

B, appendix D.

– Included p g gy ( ) rovisions for measuring the energy factor (EF).

• Test Procedure Final Rule. 76 FR 972, Jan. 6, 2011. 

– Amended clothes dryer test procedure and established ap– Incorporated provisions from IEC Standard 62301 (First E

Incorporated provisions from IEC Standard 62301 (First E

measuring standby and off mode power consumption.

– Added test provisions for ventless dryers and changes to 

usage patterns and capabilities usage patterns and capabilities.

– Established new energy use metric, combined energy fact

• Manufacturers must use the test procedures in appendix 

demonstrate compliance with the amended energy conse

4 | Test Procedure for Clothes Dryers 

demonstrate compliance with the amended energy conse

standards as of Jan. 1, 2015.
Introduction

• January 2011 TP Final Rule did not adopt amendments to 

Regulatory History - Continued

accurately measure the effects of automatic cycle termina

• Request for Information Notice. 76 FR 50145, Aug. 12, 201

– DOE requested information and comment on methods for 

accurately measuring automatic cycle termination.

5 | Test Procedure for Clothes Dryers 
C

Test Procedure Overview and Issues

1. Products overed by the Proposed Amendments

2. Automatic Cycle Termination3. Incorporation by Reference of IEC Standard 62301 (Seco

Edition) for Measuring Standby Mode and Off Mode PoweConsumption

4. Technical Correction to Per-Cycle Combined Total Energ

Consumption Calculation

5. Clarifications to Test Conditions6. Effects of Proposed Test Procedure Revisions on Compl

Standards

7. Compliance with Other EPCA Requirements

6 | Test Procedure for Clothes Dryers 
Covered Products

• 10 CFR part 430.2 provides the following product definitio

Products Covered by This Test Procedure Rulem

p p gp

– Electric clothes dryer means a cabinet-like appliance desi

fabrics in a tumble-type drum with forced air circulation. Tsource is electricity () 

 and the drum and blower(s) are driven 

electric motor(s).

– Gas clothes dryer means a cabinet-like appliance designe

fabrics in a tumble-type drum with forced air circulation. Tsource is gas and the drum and blower(s) are driven by an motor(s).

• DOE is not proposing any amendments to these product 

7 | Test Procedure for Clothes Dryers 
C

Test Procedure Overview and Issues

1. Products overed by the Proposed Amendments

2. Automatic Cycle Termination3. Incorporation by Reference of IEC Standard 62301 (Seco

Edition) for Measuring Standby Mode and Off Mode PoweConsumption

4. Technical Correction to Per-Cycle Combined Total Energ

Consumption Calculation

5. Clarifications to Test Conditions6. Effects of Proposed Test Procedure Revisions on Compl

Standards

7. Compliance with Other EPCA Requirements

8 | Test Procedure for Clothes Dryers 
Automatic Cycle Termination

• Current DOE test procedures in appendices D and D1 pro

January 2011 TP Final Rule

use factor to account for automatic cycle termination.

– Does not distinguish between type of sensors and the acc

sophistication of the control system.

• In the January 2011 TP Final Rule, DOE did not adopt ame

to more accurately measure automatic cycle termination.

– DOE testing showed that all tested dryers significantly ove

DOE test load to near bone dry.

– The measured EF values using the proposed test method 

use factor of 1.0) were significantly lower than the EF valuthe existing appendix D test procedure.

9 | Test Procedure for Clothes Dryers 
Automatic Cycle Termination

• Previously proposed amendments did not adequately me

January 2011 TP Final Rule

energy consumption for automatic termination control sy

– Automatic termination control dryers may be designed to s

cycle when a load of varying weights, composition, and sihi h RMC th th RMC bt i d i th d hi

g

her RMC than the RMC obt

aine

d using the propose

d a

cycle termination test procedure with the existing DOE tes

10 | Test Procedure for Clothes Dryers 
Automatic Cycle Termination

• August 2011 RFI sought information and comments on au

August 2011 RFI

cycle termination test methods.

– Characteristics of loads of varying weights, composition, a– Accuracy of automatic cycle termination sensors and cont– Target final RMC used by manufacturers to maintain cons

satisfaction; 

– Effects of characteristics of water for wetting load; and– Automatic termination cycle settings selected by consume

• Joint Petition stated that DOE should amend the test proc

include 

provisions to account for the effectiveness of aut

cycle termination.

– Measure full cycle, including cool-down, using a target RM

percent.

11 | Test Procedure for Clothes Dryers 

– Revise relevant energy conservation standards.
Automatic Cycle Termination

• DOE tested 20 clothes dryers to evaluate potential test pr

Product Testing

amendments.

• DOE conducted testing using both the current DOE test lo

IEC/AHAM test load.

– DOE momie test cloths are each 24” x 36” and are a blend 

cotton/polyester.

– IEC Standard 61121 and AHAM HLD–1–2009 test load co

cotton bed sheets, towels, and pillowcases.

• Test cycle settings:

– “Normal” automatic cycle termination program.– Where the temperature setting can be chosen independen

program, the highest level was selected.

– Where the dr

yness level settin

g can be chosen inde

pende

12 | Test Procedure for Clothes Dryers 

y g p

program, it was set to the “normal” or “medium” level.
Automatic Cycle Termination

• Test cycle using DOE test load:

Product Testing

– Clothes dryer allowed to run until the completion of the cy

including the cool-down period.

– If the final RMC was below 2 percent using the DOE test l

test was considered valid.

– If the final RMC was higher than 2 percent, the test was re

the highest dryness level.

– 2-percent RMC threshold based on data presented in Join

regarding RMC levels acceptable to consumers. 

• Test cycle using IEC/AHAM test load:

– Similar to test cycle with DOE test load.– Threshold value of 5 percent for the final RMC because of 

varied com

position of test load.

13 | Test Procedure for Clothes Dryers 
Automatic Cycle Termination

Automatic Cycle Termination Test Results

DOE Test 

P d Atd DOE T t L d

Autodry 

Product Class

Proce

dure 

(Appendix D1) 

– Average CEF 

(lbs/kWh)

A

uto

dry

– DOE

Test Loa

d

Average CEF 

(lbs/kWh)

Average % 

Change

Average C

(lbs/kW

Electric, Standard 3.79 3.16 -16.6 3.03 

Vented Electric, Compact (240 V) 3.54 2.79 -21.1 2.68 

Electric, Compact (120 V) 3.75 2.18 -41.9 2.42 Gas 3.39 2.92 -13.9 2.79 

V tl

Electric, Compact (240 V) 2.98 2.73 -8.4 2.63 

• DOE Test Load – Change in measured CEF ranged from -3

percent

Ventless Electric, Combination 

Washer/Dryer 2.54 2.45 -3.9 2.29 

percent.

• IEC/AHAM Test Load – Change in measured CEF ranged f

-40.3 percent.

14 | Test Procedure for Clothes Dryers 
Automatic Cycle Termination

Automatic Cycle Termination Test Results

DOE Test DOE Test DOE Test Procedure

Procedure 

(Appendix D1)

DOE Test Procedure

(Appendix D1) with 

IEC/AHAM Test Load

Autodry – DOE

Test Load

A

Range of Average Final RMC - - 0.4 – 2.0 

Test-to-Test Variation 

–

Standard Error 0.87 1.02 1.87 Lab-to-LabReproducibility

– - - 3 0 

Percentage Difference

3.0

15 | Test Procedure for Clothes Dryers 
Automatic Cycle Termination

• A number of units were tested at an independent test lab 

Automatic Cycle Termination Energy Consumption v

automatic cycle termination test method with DOE test lo

– Measured and recorded the energy consumption and esti

instantaneous RMC throughout the test cycle.

Product Class

Test 

Unit

Autodry Sensor 

Technology

Energy Consumption (kWh)

5% RMC 2% RMC

End of Cycle (M

RMC (%

1 Mit 1 945 2 070 2 624 (1 

Vented Electric Standard

1 M

oisture 1.945

2.070

2.624 (1

2 Temperature 2.068 2.233 3.119 (04 Moisture 2.160 2.318 2.405 (06 Moisture 2.091 2.280 3.141 (1

Vented Electric Compact (240V) 10 Temperature 0.823 0.875 1.418 (2Vented Gas

13 Moisture 2.375 2.569 2.905 (015 Moisture 2.347 2.532 3.161 (1

16 | Test Procedure for Clothes Dryers 

17 Moisture 2.300 2.482 2.843 (1
Automatic Cycle Termination

• Portion of dry cycle when load has initially reached 5-perc

Vented Electric Standard Automatic Termination Te

3.153.35

h)

= 2% RMC

2.752.95

sumption (kW Elec Std 

Elec Std El Std 

2.352.55

Energy ConsElec Std 

Elec Std 

1.952.15

0:20 0:27 0:34 0:41 0:48 

Time (hours:minutes)

5% RMC

17 | Test Procedure for Clothes Dryers 

( )
Automatic Cycle Termination

Vented Gas Automatic Termination Test Cyc

3.13.23.3

Wh)

Gas #13Gas #15Gas #17

= 2% RMC

2.82.9

3

sumption (kW

2.52.62.7

Energy Cons

2.32.4

0:20 0:23 0:25 0:28 0:31 0:34 0:37 0:40 

Time (hours:minutes)

5% RMC

18 | Test Procedure for Clothes Dryers 

( )
Automatic Cycle Termination

• DOE applied a field use factor to account for the measure

Automatic Cycle Termination Field Use Fact

consumption at the end of the automatic termination cyclthe DOE test load below 2-percent RMC.

– Field use factor of 0.80.

Product Class

Test 

Unit

Energy Consumption (kWh)

2% RMC

End of Test -

Measured

End of Test -

Field Adjusted

1 2.070 2.624 2.099

Vented Electric 

2 2 233 3 119 2 495

Standard

2

2.233

3.119

2.495

4 2.318 2.405 1.9246 2.280 3.141 2.513

Vented Electric Compact (240V) 10 0.875 1.418 1.134 Compact (240V)Vented Gas

13 2.569 2.905 2.32415 2.532 3.161 2.52817 2.482 2.843 2.274

19 | Test Procedure for Clothes Dryers 
Automatic Cycle Termination

• IEC Standard 61121 Fourth Edition 

IEC Water Supply Testing

– Characteristics of water used for wetting the test load may 

the results for automatic termination dryers with moisture 

Water type

Property Unit

Water type

Standard soft 

water

Standard ha

water

Total hardness mmol/l Total hardness 0 50

± 0 20 2 50

± 0 20 (Ca2+/Mg2+) 0.50

±

0.20

2.50

±

0.20

Conductivity

(at 20°C) μS/cm 150 ± 50 750 ± 150

• DOE conducted testing on a select number of dryers with 

requirements for standard soft water.

20 | Test Procedure for Clothes Dryers 
Automatic Cycle Termination

IEC Water Test Results – DOE Test Load

DOE Test Autodry Appendix D1 Autodry 

Product Class

Procedure 

(Appendix D1) 

– Average CEF 

(lbs/kWh)

Water – DOE Test Load DOE 

Average CEF 

(lbs/kWh)

Average % 

Change

Average C

(lbs/kW

Electric, Standard 3.75 3.17 -15.3 3.17 

Vented Electric, Compact (240 v) 3.54 2.79 -21.1 2.84 

Electric, Compact (120 v) 3.75 2.18 -41.9 2.27 Gas 3.39 2.97 -12.4 2.96 El t i C t (240 ) 2 98 2 73 8 4 2 85 

Ventless

Electric, 

Compact (240 v) 2.98

2.73 -8.4

2.85 

Electric, Combination Washer/Dryer 2.28 2.19 -3.9 2.19 

21 | Test Procedure for Clothes Dryers 
Automatic Cycle Termination

IEC Water Test Results – IEC/AHAM Test Loa

DOE Test Autodry Appendix D1 Water Autod

Product Class

Procedure 

(Appendix D1) 

– Average CEF 

(lbs/kWh)

– IEC/AHAM Test Load IEC/

Average CEF 

(lbs/kWh)

Average % 

Change

Aver

CE

(lbs/k

Electric, Standard 3.75 3.01 -19.5 3.0

Vented Electric, Compact (240 v) 3.54 2.68 -24.4 2.6

Electric, Compact (120 v) 3.75 2.42 -35.6 2.4Gas 3.39 2.82 -16.7 2.8El t i C t (240 ) 2 98 2 63 11 9 2 8

Th difi ti t th t l ifi d i IEC St 

Ventless

Electric, 

Compact (240 v) 2.98

2.63 -11.9

2.8

Electric, Combination Washer/Dryer 2.28 2.14 -6.1 2.1

• The modifications 

to the wa

ter supply specifi

e

d in IEC Sta

61121 did not have a definitive effect on the measured CE

22 | Test Procedure for Clothes Dryers 
Automatic Cycle Termination

IEC Water Supply Test Results

DOE Test Load IEC/AHAM T

Autodry Autodry

Appendix D1 

Water

Autodry IEC Soft 

Water 

Autodry

Appendix D1 

Water

A

Range of Average Final RMC (

%) 0.4 – 2.0 0.5 – 2.0 1.3 – 4.7 

Test-to-Test Variation –Standard Error (

%) 1.96 1.89 2.31 

Lab-to-LabReproducibility – - - 4.4 

• No definitive correlations between the average final RMC 

water supply specifications

Percentage Difference (

%)

water supply specifications.

• No significant difference in repeatability between append

IEC soft water supply tests.

Percentage difference in test res lts from lab to lab is it

23 | Test Procedure for Clothes Dryers 

• Percentage difference in test res

ults from lab to lab is wit

test-to-test variation within a lab for the IEC/AHAM test lo
Automatic Cycle Termination

• DOE is not proposing amendments to require modificatio

IEC Water Supply

water supply used for wetting the test load according to IStandard 61121.

• DOE may consider amendments if data is made available 

i d t bilit d d ibilit i th dimprove

d repea

t

ability an

d repro

ducibility using the mod

supply.

24 | Test Procedure for Clothes Dryers 
Automatic Cycle Termination

• Automatic Termination Control Dryer

Automatic Cycle Termination Proposed Amendments 

– A clothes dryer which can be preset to carry out at least o

operation to be terminated by means of a system assessinor indirectly, the moisture content of the load.

– An automatic termination control dryer with supplementary 

that may also be manually controlled shall be tested as an termination control dryer.

• Timer Dryer

– A clothes dryer that can be preset to carry out at least one 

to be terminated by a timer, but may also be manually condoes not include any automatic termination function.

25 | Test Procedure for Clothes Dryers 
Automatic Cycle Termination

• DOE is not proposing changes to the test load compositio

Automatic Cycle Termination Proposed Amendments 

• DOE proposes to change the starting RMC from 57.5% ± 3

57.5% ± 0.33%.

– Allowing a wide range, such as ± 3.5%, would result in sig

different results using the proposed test method.

Item 1 DOE seeks comment on the proposal to continue usinDOE test load. DOE welcomes additional data on the test-to-re

p y eatabilit

y and lab-to-lab re

p y roducibilit

y of both the DOE an

IEC/AHAM test load. 

26 | Test Procedure for Clothes Dryers 
Automatic Cycle Termination

• The “normal” cycle program shall be selected. 

Proposed Test Cycle for Automatic Termination Con

– For dryers that do not have a “normal” program, the cycle 

recommended by the manufacturer for drying cotton or linshall be used.

• Where the drying temperature can be chosen independen

program, it shall be set to the maximum temperature setti

• Where the dryness level setting can be chosen independe

program, it shall be set to the “normal” or “medium” drynsetting. 

– If such designation is not provided, the dryness level shall 

the mid-point between the minimum and maximum setting

• Cycle settings shall be recorded.

27 | Test Procedure for Clothes Dryers 
Automatic Cycle Termination

• Dryer allowed to run until completion of the cycle, includi

Proposed Test Cycle for Automatic Termination Con

cool-down period.

• If the RMC is higher than 2 percent, the test would be inva

must be re-run but using the highest dryness level setting

– Final RMC of 2 percent using the DOE test load would be 

representative of dryers currently on the market and reprethe maximum consumer-accepted final RMC.

• Field use factor in per-cycle energy use calculation chang

1.04 to 0.80 for automatic termination control dryers.

– Based on the energy consumption versus estimated RMC – Account for the measured energy consumption at the end 

automatic termination cycle drying the DOE test load beloRMC.

28 | Test Procedure for Clothes Dryers 
Automatic Cycle Termination

Request for Comment on Automatic Termination Te

Item 2 DOE seeks comment on the proposed amendments taccurately measure the effects of automatic cycle terminationspecifically requests comment on the proposed maximum allspecifically requests comment on the proposed maximum all

final RMC of 2 percent using the DOE test load. DOE further comment on the proposed test cycle program settings, tempesettin

g, y g q s, and dr

yness level settin

gs. DOE also re

quests com

additional test data on the proposed field use factor of 0.80 foautomatic cycle termination clothes dryers. 

29 | Test Procedure for Clothes Dryers 
Automatic Cycle Termination

• Continue to use the test method in appendix D1 with the f

Proposed Test Cycle for Timer Dryers

modifications:

– Change final RMC from 2.5 – 5.0 percent to 1.0 – 2.5 perc– Added clarification that the dryer should not be stopped in

in the middle of the test cycle for any reason.

– Normalization in the per-cycle energy consumption calcula

changed to represent the new target RMC of 2 percent.

• DOE is not proposing any changes to the field use factor • DOE is not proposing to include the cool-down period. 

– Includin

g the cool-down 

p g

eriod would add si

gnificant testin

determine and preset the appropriate time setting.

– Different combinations of timed dry cycle length and cool-

ma

y be selected to dr

y the load to the same final RMC.

30 | Test Procedure for Clothes Dryers 

y y
Automatic Cycle Termination

Request for Comment on Timed Dry Test Cyc

Item 3 DOE seeks comment on the proposed test method fodryers. In particular, DOE seeks comment on the proposed firange of 1.0 – 2.5 percent with the normalization of the per-cenergy consumption to represent the energy consumption redry the test load to 4-percent RMC changed to represent the RMC of 2 percent. DOE also seeks comment on the continueth 1 18 fi ld f t i th the 

1.18 fi

eld use 

fac

tor in the pe

r-cycl ti e energy consumption 

calculation for timer dryers. DOE welcomes comment on the determination to not measure the cool-down period for the tim

test cycle due to the associated test burden and difficulties wtest cycle due to the associated test burden and difficulties w

determining the appropriated timed dry cycle time. DOE also comment on the proposed amendment to clarify that the cloth

should not be stopped intermittently in the middle of the time

31 | Test Procedure for Clothes Dryers 

should not be stopped intermittently in the middle of the time

cycle for any reason. 
Automatic Cycle Termination

Request for Comment on Modified Water for Wetting 

Item 4 DOE welcomes comment on the determination to not amendments to include requirements for the characteristics owater supply used for wetting the test load prior to the test cywater supply used for wetting the test load prior to the test cy

welcomes additional data evaluating the repeatability and reproducibility of test results using both appendix D1 water amodified accordin

g q to the re

quirements in IEC Standard 6112

32 | Test Procedure for Clothes Dryers 
C

Test Procedure Overview and Issues

1. Products overed by the Proposed Amendments

2. Automatic Cycle Termination3. Incorporation by Reference of IEC Standard 62301 (Seco

Edition) for Measuring Standby Mode and Off Mode PoweConsumption

4. Technical Correction to Per-Cycle Combined Total Energ

Consumption Calculation

5. Clarifications to Test Conditions6. Effects of Proposed Test Procedure Revisions on Compl

Standards

7. Compliance with Other EPCA Requirements

33 | Test Procedure for Clothes Dryers 
Incorporating IEC Standard 62301 

(Second Edition)

• The January 2011 TP Final Rule incorporated relevant pro

IEC Standard 62301 (Second Edition)

from IEC Standard 62301 (First Edition) for measuring staand off mode power. 

– Additional clarifications to provide a stabilization period of 

mi t f ll d b 10 i t 

inutes followe

d

by a 10 minute energy use measuremen

– Incorporated mode definitions based on IEC Standard 623

Edition Committee Draft for Vote (CDV).

• For this NOPR, DOE decided to consider IEC Standard 62

(Second Edition), which published on January 27, 2011. 

– Internationally accepted test procedure.– Provides clarifications to certain sections as compared to 

Edition.

34 | Test Procedure for Clothes Dryers 
Incorporating IEC Standard 62301 

(Second Edition)

• DOE proposes to incorporate by reference IEC Standard 6

Power Measurement Accuracy

(Second Edition), section 4.4, “Power measuring instrume

– More comprehensive specification of the required power 

measurement accuracy.

– Requirements to measure the crest factor and power facto

input power, and to calculate the maximum current ratio (Mthe allowable uncertainty in MCR.

•

Allowable uncertainty is the same or less stringent than the a

uncertainty specified in the First Edition.

• Change in the allowable uncertainty maintains sufficient accu

measurements without placing undue demands on the instrumeasurements without placing undue demands on the instru

35 | Test Procedure for Clothes Dryers 
Incorporating IEC Standard 62301 

(Second Edition)

• IEC Standard 62301 (Second Edition) Power Supply and M

Power Supply

Instrument Requirements

– Section 4.3.2 requires that the harmonic content of the vo

be recorded during the test.

– Section 4.4.1 requires measurement of the crest factor an

current ratio.

– Section 4.4.3 requires measurement of the average powe

integrated total energy consumption. 

• Industry-standard instruments are unable to measure har

content or crest factor while measuring average power or integrated energy consumption.

– DOE proposes that it would be acceptable to measure the 

harmonic content, crest factor, and maximum current ratio i di t l b f d ft th t l tt t

36 | Test Procedure for Clothes Dryers 

immedi

ately 

b

efore an

d after the actual test measurement
Incorporating IEC Standard 62301 

(Second Edition)

• Section 5.3 of IEC Standard 62301 (Second Edition)

Test Method

– Contains more detailed techniques to evaluate the power 

consumption stability and to measure the power consumploads with different stability characteristics.

– Sampling, average reading, and direct meter reading meth

• DOE proposes to require the use of the sampling method 

5.3.2 of the Second Edition for all standby and off mode pmeasurements.

– Test duration is approximately the same or similar to the a

alternative methods.

– Does not require classification of the nature of the power 

consumption (e.g., stable or unstable, cyclic or non-cyclic) 

of the test.

37 | Test Procedure for Clothes Dryers 
Incorporating IEC Standard 62301

Request for Comment on Incorporation by Referen

Standard 62301 (Second Edition)

Item 5 DOE invites comment on the adequacy of IEC Standa(Second Edition) to measure standby mode and off mode poconsumption for clothes dryers, and the suitability of incorporDOE regulations specific provisions from IEC Standard 6230Edition). DOE also invites comment on the acceptability of mthe total harmonic content, crest factor, and maximum currenbefore and after the actual test measurement if the power mebefore and after the actual test measurement if the power me

instrument is unable to perform these measurements during test measurement.

38 | Test Procedure for Clothes Dryers 
C

Test Procedure Overview and Issues

1. Products overed by the Proposed Amendments

2. Automatic Cycle Termination3. Incorporation by Reference of IEC Standard 62301 (Seco

Edition) for Measuring Standby Mode and Off Mode PoweConsumption

4. Technical Correction to Per-Cycle Combined Total Energ

Consumption Calculation

5. Clarifications to Test Conditions6. Effects of Proposed Test Procedure Revisions on Compl

Standards

7. Compliance with Other EPCA Requirements

39 | Test Procedure for Clothes Dryers 
Technical Correction

• The calculation of the per cycle combined total energy

Technical Correction to the Per-Cycle Combined Tot

Consumption Calculation

• The calculation of the per-cycle combined total energy

consumption contains a reference to an incorrect section 

– The per-cycle standby mode and off mode energy consum

ETSO, which is contained in section 4 5 is incorrectly refer

which is contained in section 4.5, is incorrectly refer

the per-cycle combined total energy consumption as secti

• DOE proposes to correct this section number reference.

Item 6 DOE seeks comment on the proposed amendments tthe section number reference for the per the section number reference for the per-cycle standby mode 

cycle standby mode 

mode energy consumption contained in the calculation of the combined total energy consumption.

40 | Test Procedure for Clothes Dryers 
C

Test Procedure Overview and Issues

1. Products overed by the Proposed Amendments

2. Automatic Cycle Termination3. Incorporation by Reference of IEC Standard 62301 (Seco

Edition) for Measuring Standby Mode and Off Mode PoweConsumption

4. Technical Correction to Per-Cycle Combined Total Energ

Consumption Calculation

5. Clarifications to Test Conditions6. Effects of Proposed Test Procedure Revisions on Compl

Standards

7. Compliance with Other EPCA Requirements

41 | Test Procedure for Clothes Dryers 
Clarifications to Test Conditions

• Inquiry regarding how to test a clothes dryer with timed d

Cycle Settings

Inquiry regarding how to test

a clothes dryer with timed d

length settings, but no temperature settings on the contro

– Section 3.3 in appendix D specifies that the maximum tem

settin

g , q pp , and, if a tested unit is e

quipped with a timer, the m

time setting must be used for the drying test cycle. 

• DOE proposes to clarify appendices D and D1 (proposed 

dr

y ) test method

).

– If a clothes dryer does not have a separate temperature s

selection on the control panel, the maximum time setting sused for the drying test cycle.

42 | Test Procedure for Clothes Dryers 
Clarifications to Test Conditions

• Inquiry regarding how to test a dryer with an optional cyc

Cycle Settings

regarding how to test

a dryer with an optional cyc

setting, other than the temperature/time settings, that is aby default in the condition as shipped by the manufacture

•

Appendices D and D1 

( y for timer dr

yers

): 

– DOE proposes to clarify that the test procedures specify 

requirements only for the temperature setting and time sedo not s

py y p g ecif

y modifications to an

y other o

ptional settin

gs 

not affect those setting.

• Appendix D1 (for automatic termination control dryers):

– DOE proposes DOE proposes to clarify to clarify that the test procedures specify the test procedures specify

requirements only for the automatic termination cycle progtemperature setting, and dryness setting, and do not specmodifications to any other optional settings that do not affe

43 | Test Procedure for Clothes Dryers 

those settings.
Clarifications to Test Conditions

• Section 2.3.2 in appendices

D and D1:

Gas Supply Requirements

Section 2.3.2 in appendices

D and D1:

– The gas supply to the clothes dryer should be maintained 

normal inlet test pressure at 7 to 10 inches of water colum

– The hourly Btu rating of the burner shall be maintained wit

hourly Btu rating of the burner shall be maintained wit

percent of the manufacturer specified rating. 

• Inquiry noting that during testing, the dryer under test did 

meet the meet the Btu rating requirement under Btu rating requirement under the allowable rang

the allowable rang

inlet test pressure. 

– DOE proposes to clarify that if the requirement for the hou

rating of the burner rating of the burner cannot be achieved under the allowab

be achieved under the allowab

in gas inlet test pressure, the orifice of the gas burner shomodified as necessary to achieve the required Btu rating.

44 | Test Procedure for Clothes Dryers 
Clarifications to Test Conditions

• Section 2.3.2 in appendices

D and D1:

Gas Supply Requirements

Section 2.3.2 in appendices

D and D1:

– If a clothes dryer is equipped with a gas appliance pressu

regulator, the regulator outlet pressure at the normal test pshall be app y y roximatel

y that recommended b

y the manufac

• Test procedures for similar gas heating products, such as 

water heaters, specifies that the regulator outlet pressure within ± 10 

p py ercent of the value s

pecified b

y the manufact

• DOE proposes to clarify the term “approximately” by spe

that the regulator outlet pressure shall be within ± 10 percthe value specified by the manufacturer.

45 | Test Procedure for Clothes Dryers 
Clarifications to Test Conditions

• Inquiry requesting clarification on section 2.1 in appendic

Console Lights

Inquiry requesting clarification on section 2.1 in appendic

D1:

– All console lights or other lighting systems that do not con

more than 10 watts shall be disconnected durin

g 

 the cloth

active mode test cycle.

• Originally adopted in the September 1977 Final Rule.

– Applied to an older generation of to an older generation of dryers that dryers that used task ligh

used task ligh

illuminate the area of the dryer for consumers doing the lathat did not provide any function related to the drying proc

• Newer generation Newer generation dryers equipped with electronic contro

equipped with electronic contro

have fully integrated control setting indicator. 

– Indicator lights showing the cycle progression, temperatur

dr

yness settin

g

s, or other c

ycle functions.

46 | Test Procedure for Clothes Dryers 

y g, y
Clarifications to Test Conditions

• DOE proposes to clarify that:

Console Lights

DOE proposes to clarify that:

– All lights, such as task lights, that do not provide any infor

related to the drying process on the clothes dryer which dconsume more than 10 watts durin

g y the clothes dr

yer test 

shall be disconnected for the active mode test cycle.

– Control setting indicator lights that cannot be turned off du

test c

y g cle shall not be disconnected durin

g the active mod

cycle. 

47 | Test Procedure for Clothes Dryers 
Clarifications to Test Conditions

• Inquiry requesting clarification on section 3.1 in appendic

Drum Capacity Measurement

Inquiry requesting clarification on section 3.1 in appendic

D1:

– When measuring drum capacity, the drum shall be filled w

to a level determined b

y p the intersection of the door 

plane 

loading port.

– Volume should be added or subtracted as appropriate dep

on whether the 

pg p lastic ba

g used for the measurement 

prot

into the drum interior.

• DOE proposes to clarify that:

– The intersection of the door plane and the loading port ref

intersection of the door plane and the loading port ref

uppermost edge of the drum that is in contact with the doo

– Volume should be added or subtracted from the measured 

volume based on the s

pace in the drum interior occu

pied 

48 | Test Procedure for Clothes Dryers 

p p

door or the space above the uppermost edge of the drum curved door. 
Clarifications to Test Conditions

• Section 2.4.1

– Test Cloth Weighing Scale:

Weighing Scale Instrumentation

2.4.1 Test Cloth Weighing Scale:

– Range of 0 to a maximum of 30 lbs– Resolution of at least 0.2 ounces – Maximum error no greater than 0 3 percent of any measu

error no greater than

0.3 percent of any measu

within the range of 3 to 15 lbs

• Section 2.4.1.2 – Drum Capacity Weighing Scale:

–

Range of 0 t i f 500 f 0 to a maximum of 500 lb

s

– Resolution of 0.50 lb– Maximum error no greater than 0.5 percent of the measur

• DOE received an inquiry requesting clarification of these 

requirements.

49 | Test Procedure for Clothes Dryers 
Clarifications to Test Conditions

• Scales for weighing the test cloth may have maximum ca

Weighing Scale Instrumentation

for weighing the test cloth may have maximum ca

higher than 30 pounds, but still meet the requirements foresolution and maximum error within the range of 3 to 15 

• A clothes dr

y, p 

er, when filled with water for the drum ca

pac

measurement, could exceed 500 pounds. 

• DOE proposes to allow a higher maximum scale range, 60 

for wei

gg p p 

hin

g the test cloth and 600 

pounds for drum ca

pa

measurements. 

– The resolution and maximum error requirements would re

unchanged.

50 | Test Procedure for Clothes Dryers 
Clarifications to Test Conditions

• Inquiry requesting clarification of section 2.4.4 in append

Relative Humidity Measurement

Inquiry requesting clarification of section 2.4.4 in append

and D1:

– Dry and wet bulb psychrometer used for measuring the am

humidit

y g shall have an error no 

greater than ± 1 °F.

• DOE recognizes that relative humidity meters may be an 

acceptable means to measure the ambient humidity.

– Some humidity meters may express error tolerances in te

humidity meters may express error tolerances in te

dry and wet bulb temperatures, while others express error tolerances in terms of percent relative humidity.

– DOE determined, based on the allowable range in ambien

determined, based on the allowable range in ambien

temperature and humidity, that a ± 1°F tolerance for the dbulb temperatures would translate to a tolerance between percent and ± 4 percent relative humidity. 

51 | Test Procedure for Clothes Dryers 
Clarifications to Test Conditions

• DOE proposes that a relative humidity meter with a maxim

Relative Humidity Measurement

DOE proposes that

a relative humidity meter with

a maxim

error tolerance expressed in °F equivalent to the requiremdry and wet bulb psychrometer or with a maximum error tof ± 2 percent relative humidity would be acceptable for te

Item

7. DOE seeks comment on the proposed amendments 

. DOE seeks comment on the proposed amendments 

(1) the cycle settings used for the test cycle, (2) the requiremthe hourly Btu rating of the burner and the regulator outlet preclothes dr

y g g 

ers equipped with a 

gas appliance pressure re

gul

the installation conditions for console lights, (4) the method fomeasuring the drum capacity, (5) the maximum allowable scaand (6) the allowable use of a relative humidity meter.

52 | Test Procedure for Clothes Dryers 
C

Test Procedure Overview and Issues

1. Products overed by the Proposed Amendments

2. Automatic Cycle Termination3. Incorporation by Reference of IEC Standard 62301 (Seco

Edition) for Measuring Standby Mode and Off Mode PoweConsumption

4. Technical Correction to Per-Cycle Combined Total Energ

Consumption Calculation

5. Clarifications to Test Conditions6. Effects of Proposed Test Procedure Revisions on Compl

Standards

7. Compliance with Other EPCA Requirements

53 | Test Procedure for Clothes Dryers 
Effects of Proposed Amendments

• DOE must determine to what extent, if any, the proposed 

Effects of Proposed Amendments on Energy Cons

Standards

DOE must determine to what extent, if any, the proposed 

procedure would alter the measured energy efficiency of covered product as determined under the existing test pr

– If DOE determines that the amended test 

procedure would 

measured efficiency of a covered product, DOE must ameapplicable energy conservation standard accordingly. (42 6293(e))

• DOE is only proposing to amendment to appendix D to cl

testing conditions.

– The proposed amendments would not alter the measured 

according to appendix D.

– Would not affect a manufacturer’s ability to demonstrate 

compliance with the current energy conservation standard

54 | Test Procedure for Clothes Dryers 

CFR 430.32(h)(2)).
Effects of Proposed Amendments

• January 1, 2015 standards are based on CEF as measured

Effects of Proposed Amendments on Energy Cons

Standards

January 1, 2015 standards are based on CEF as measured

according to the test procedure in appendix D1.

• DOE investigated how the proposed amendments for auto

c

ycle termination would affect the measured CE

F.

– DOE conducted testing on 20 clothes dryers according to 

proposed test method. 

– Results showed Results showed that specific models resulted in either a h

that specific models resulted in either

a h

lower measured CEF as compared to the current test proranging from a 27.4 percent decrease to a 20.4 percent inCEF with an average of a 3.8 percent increase.

• DOE concludes that the proposed active mode amendme

on average not impact the measured efficiency as compathe current test procedure for models currently available 

55 | Test Procedure for Clothes Dryers 

market.
Effects of Proposed Amendments

• DOE conducted testing to determine how the proposed

Effects of Proposed Amendments on Energy Cons

Standards

DOE conducted testing to determine how the proposed

amendments to appendix D1 for standby mode and off mowould affect the measured CEF.

Average Standby Power (

W)

Test Unit

Average Standby Power (W)

Existing Appendix D1 Proposed Appendix D1

1 0.97 0.973 0.16 0.16

14 0.38 0.3816 0.70 0.70

• DOE believes that the proposed standby and off mode tes

procedure amendments would not alter the measured CE

• DOE is not considering amendments to the January 1, 20

ti t d d

56 | Test Procedure for Clothes Dryers 

energy conservation s

tan

dar

ds.
Effects of Proposed Amendments

Request for Comment on Effects of Proposed Amen

Energy Conservation Standards

Item 8 DOE welcomes comments and additional data on the the proposed test procedure amendments on the current eneconservation standards in both 10 CFR 430 32(h)(2) and (3) conservation standards in both 10 CFR 430.32(h)(2) and (3). 

particular, DOE seeks comment on the proposed determinatiamend the energy conservation standards based on the prop

procedure amendments for automatic cycle procedure amendments for automatic cycle termination termination. DOE 

DOE 

welcomes comment on the determination and testing results that the proposed standby mode and off mode test procedure amendments would not measurabl

y 

 affect the measured effic

compared to the existing DOE test procedure in 10 CFR 430B, appendix D1.

57 | Test Procedure for Clothes Dryers 
C

Test Procedure Overview and Issues

1. Products overed by the Proposed Amendments

2. Automatic Cycle Termination3. Incorporation by Reference of IEC Standard 62301 (Seco

Edition) for Measuring Standby Mode and Off Mode PoweConsumption

4. Technical Correction to Per-Cycle Combined Total Energ

Consumption Calculation

5. Clarifications to Test Conditions6. Effects of Proposed Test Procedure Revisions on Compl

Standards

7. Compliance with Other EPCA Requirements

58 | Test Procedure for Clothes Dryers 
Other EPCA Requirements

• Automatic Cycle Termination:

Test Burden – Active Mode

Automatic Cycle Termination:

– Proposed test method would require the measurement of 

programmed automatic termination cycle, including cool-d

– Less burdensome than current test procedure Less burdensome than current test procedure, which requ

which requ

tester to monitor or make estimates about the RMC of the determine when to stop the test to achieve the desired fin

• Timed Dry:

– Proposed test method would use same basic test method 

in appendix D1, except the test cycle would be stopped at percent rather then 2.5 percent rather then 2.5

– 5.0 percent. 5.0 percent.

– Slightly longer cycle time, but the additional time would be 

compared to the overall time to set up and conduct the tes

• For these reasons DOE believes that the proposed active 

59 | Test Procedure for Clothes Dryers 

For these reasons, DOE believes that the proposed active 

amendments would not be unduly burdensome to conduc
Other EPCA Requirements

• Standby mode and off mode proposed provisions from IE

Test Burden – Standby and Off Mode

Standby mode and off mode proposed provisions from IE

Standard 62301 (Second Edition)

– Provide a means to measure power consumption with gre

accurac

yp y and re

peatabilit

y than the First Edition.

– Interested parties commented that the test methods would 

unduly burdensome to conduct.

– The potential for increased test burden for certain power The potential for increased test burden for certain power

consumption measurements is offset by more reasonable requirements for testing equipment.

• DOE tentatively concludes that the proposed test DOE tentatively concludes that the proposed test procedu

procedu

would not be unduly burdensome to conduct.

60 | Test Procedure for Clothes Dryers 
Other EPCA Requirements

Request for Comment on Test Burden

Item 9 DOE seeks comment on any added test burden assocthe 

pp q 

ro

posed amendments. DOE re

quests that commenters 

specific details and quantify any burdens. 

61 | Test Procedure for Clothes Dryers 
Other EPCA Requirements

• The certification requirements for residential clothes drye

Certification Requirements

The certification requirements for residential clothes drye

consist of a sampling plan for selection of units for testinrequirements for certification reports. 

• DOE 

p p p p gp ro

poses to amend the 

provisions in the sam

plin

g

p

CFR 429.21(a)(2) to include CEF.

• DOE proposes to amend the reporting requirements in 10 

429.21

( )( b

2

).

– Require manufacturers, when using appendix D or D1, to 

an indication if the dryer has automatic termination controalso to report the hourly Btu rating of the burner for gas dr

– Require manufacturers, when using appendix D1, to list th

setting selections for the energy test cycle for each basic 

62 | Test Procedure for Clothes Dryers 
Other EPCA Requirements

• DOE issued guidance that manufacturers may voluntarily 

Compliance Date

issued guidance that manufacturers may voluntarily 

newly amended test procedures to rate and certify their pprior to the compliance date requiring the use of that ametest procedure.

• Effective 180 days after the promulgation of any final ame

to the test procedure based on this proposal:

– Manufacturers must make re

p gy 

resentations of energy effici

including certifications of compliance, using either appendappendix D1.

– Manufacturers must use a single appendix for all represen

including certifications of compliance, and may not use apfor certain representations and appendix D1 for others.

• Compliance with DOE’s amended standards for clothes d

63 | Test Procedure for Clothes Dryers 

and corresponding use of the test procedures at Appendiall representations is required as of January 1, 2015. 
Closing

In all correspondence, please refer to the Clothes Dryer Test Proce

How to Submit Written Comments

In all correspondence, please refer to the Clothes Dryer Test Proce

rulemaking by:

– Test Procedure NOPR for Residential Clothes Dryers– Docket Number EERE-2011-BT-TP-0054– Regulatory Identification Number (RIN) 1904-AC63

Email: RCDAT-2011-TP-0054@ee.doe.govPostal Mail: Ms. Brenda Jones, U.S. Department of Energy

Building Technologies Program Mailstop EE Building Technologies Program, Mailstop EE-2J1000 Independence Avenue, SWWashington, DC 20585-0121

Courier: Ms. Brenda Jones, U.S. Department of Energy

Building Technologies Program 

950 L’Enfant Plaza, SW., Suite 600Washington, DC, 20024.

Telephone: (202) 586-2945

64 | Test Procedure for Clothes Dryers 

Comment period closes March 18, 2013.