Source: https://www.ecfr.gov/cgi-bin/text-idx?mc=true&node=sp10.3.431.y&rgn=div6
Timestamp: 2020-02-18 20:18:02
Document Index: 378387331

Matched Legal Cases: ['art 431', '§431', '§431', '§431', 'art 431', 'art 431', 'art 431', 'art 51', '§431', '§431', '§431', 'art 431', '§431', '§431', '§431', '§431', 'art 50', '§431', '§431', '§431', '§431', 'art.\n2', 'art 50', '§431', '§429', '§431', '§431', '§431', '§431', '§431', '§431', '§431', '§431', '§431', '§431', '§431', '§431', '§431', '§431', '§431', '§431', '§431', '§431', '§431', '§431', 'arts 429', '§431', '§431', '§431', '§431', '§431', 'arts 429', '§431', '§431', '§431', '§431', '§431', '§431', '§431', '§431', '§431', '§431', '§431', '§431', '§431', '§431', '§431', '§431', '§431', '§431']

Title 10 → Chapter II → Subchapter D → Part 431 → Subpart Y
§431.463 Materials incorporated by reference.
§431.464 Test procedure for the measurement of energy efficiency, energy consumption, and other performance factors of pumps.
§431.465 Pumps energy conservation standards and their compliance dates.
Appendix A to Subpart Y of Part 431—Uniform Test Method for the Measurement of Energy Consumption of Pumps
Appendix B to Subpart Y of Part 431—Uniform Test Method for the Measurement of Energy Efficiency of Dedicated-Purpose Pool Pumps
Appendix C to Subpart Y of Part 431—Uniform Test Method for the Measurement of Energy Efficiency of Dedicated-Purpose Pool Pumps
Source: 81 FR 4145, Jan. 25, 2016, unless otherwise noted.
(a) General. DOE incorporates by reference the following standards into subpart Y of this part. The material listed has been approved for incorporation by reference by the Director of the Federal Register in accordance with 5 U.S.C. 552(a) and 1 CFR part 51. Any subsequent amendment to a standard by the standard-setting organization will not affect the DOE test procedures unless and until amended by DOE. Material is incorporated as it exists on the date of the approval, and notification of any change in the material will be published in the Federal Register. All approved material can be obtained from the sources listed in this section and is available for inspection at the U.S. Department of Energy, Office of Energy Efficiency and Renewable Energy, Building Technologies Program, Sixth Floor, 950 L'Enfant Plaza SW., Washington, DC 20024, (202) 586-2945, or go to: http://www1.eere.energy.gov/buildings/appliance__standards. It is also available for inspection at the National Archives and Records Administration (NARA). For information on the availability of this material at NARA, call 202-741-6030, or go to: www.archives.gov/federal__register/code__of__federal__regulations/ibr__locations.html.
(b) CSA. Canadian Standards Association, 5060 Spectrum Way, Suite 100, Mississauga, Ontario, L4W 5N6, Canada, (800) 463-6727. www.csagroup.org.
(1) CSA C747-2009 (Reaffirmed 2014), (“CSA C747-2009 (RA 2014)”), “Energy efficiency test methods for small motors,” CSA reaffirmed 2014, IBR approved for appendices B and C to this subpart, as follows:
(i) Section 1, “Scope”;
(ii) Section 3, “Definitions”;
(iii) Section 5, “General Test Requirements”; and
(iv) Section 6, “Test Method.”
(c) FM. FM Global, 1151 Boston-Providence Turnpike, P.O. Box 9102, Norwood, MA 02062, (781) 762-4300. www.fmglobal.com.
(1) FM Class Number 1319, “Approval Standard for Centrifugal Fire Pumps (Horizontal, End Suction Type),” January 2015, IBR approved for §431.462.
(d) HI. Hydraulic Institute, 6 Campus Drive, First Floor North, Parsippany, NJ 07054-4406, 973-267-9700. www.Pumps.org.
(1) ANSI/HI 1.1-1.2-2014, (“ANSI/HI 1.1-1.2-2014”), “American National Standard for Rotodynamic Centrifugal Pumps for Nomenclature and Definitions,” approved October 30, 2014, section 1.1, “Types and nomenclature,” and section 1.2.9, “Rotodynamic pump icons,” IBR approved for §431.462.
(2) ANSI/HI 2.1-2.2-2014, (“ANSI/HI 2.1-2.2-2014”), “American National Standard for Rotodynamic Vertical Pumps of Radial, Mixed, and Axial Flow Types for Nomenclature and Definitions,” approved April 8, 2014, section 2.1, “Types and nomenclature,” IBR approved for §431.462.
(3) HI 40.6-2014, (“HI 40.6-2014”), “Methods for Rotodynamic Pump Efficiency Testing,” (except section 40.6.5.3, “Test report;” Appendix A, section A.7, “Testing at temperatures exceeding 30 °C (86 °F);” and Appendix B, “Reporting of test results (normative);”) copyright 2014, IBR approved for appendix A to subpart Y of part 431.
(4) HI 40.6-2014, (“HI 40.6-2014-B”), “Methods for Rotodynamic Pump Efficiency Testing” (except sections 40.6.4.1 “Vertically suspended pumps”, 40.6.4.2 “Submersible pumps”, 40.6.5.3 “Test report”, 40.6.5.5 “Test conditions”, 40.6.5.5.2 “Speed of rotation during test”, and 40.6.6.1 “Translation of test results to rated speed of rotation”, Appendix A “Test arrangements (normative)”: A.7 “Testing at temperatures exceeding 30 °C (86 °F)”, and Appendix B, “Reporting of test results (normative)”), copyright 2014, IBR approved for appendices B and C to this subpart.
(e) IEEE. Institute of Electrical and Electronics Engineers, Inc., 45 Hoes Lane, P.O. Box 1331, Piscataway, NJ 08855-1331, (732) 981-0060. http://www.ieee.org.
(1) IEEE Std 113-1985, (“IEEE 113-1985”), “IEEE Guide: Test Procedures for Direct-Current Machines,” copyright 1985, IBR approved for appendices B and C to this subpart, as follows:
(i) Section 3, Electrical Measurements and Power Sources for all Test Procedures:
(A) Section 3.1, “Instrument Selection Factors”;
(B) Section 3.4 “Power Measurement”; and
(C) Section 3.5 “Power Sources”;
(ii) Section 4, Preliminary Tests:
(A) Section 4.1, Reference Conditions, Section 4.1.2, “Ambient Air”; and
(B) Section 4.1, Reference Conditions, Section 4.1.4 “Direction of Rotation”; and
(iii) Section 5, Performance Determination:
(A) Section 5.4, Efficiency, Section 5.4.1, “Reference Conditions”; and
(B) Section 5.4.3, Direct Measurements of Input and Output, Section 5.4.3.2 “Dynomometer or Torquemeter Method.”
(2) IEEE Std 114-2010, (“IEEE 114-2010”), “IEEE Standard Test Procedure for Single-Phase Induction Motors,” approved September 30, 2010, IBR approved for appendices B and C to this subpart, as follows:
(i) Section 3, “General tests”, Section 3.2, “Tests with load”;
(ii) Section 4 “Testing facilities”; and
(iii) Section 5, “Measurements”:
(A) Section 5.2 “Mechanical measurements”;
(B) Section 5.3 “Temperature measurements”; and
(iv) Section 6 “Tests.”
(f) NFPA. National Fire Protection Association, 1 Batterymarch Park, Quincy, MA 02169-7471, (617) 770-3000. www.nfpa.org.
(1) NFPA 20, (“NFPA 20-2016”), “Standard for the Installation of Stationary Pumps for Fire Protection,” 2016 Edition, approved June 15, 2015, IBR approved for §431.462.
(g) NSF. NSF International. 789 N. Dixboro Road, Ann Arbor, MI 48105, (743) 769-8010. www.nsf.org.
(1) NSF/ANSI 50-2015, “Equipment for Swimming Pools, Spas, Hot Tubs and Other Recreational Water Facilities,” Annex C, “(normative Test methods for the evaluation of centrifugal pumps,” Section C.3, “Self-priming capability,” ANSI approved January 26, 2015, IBR approved for §431.462 and appendices B and C to this subpart.
(h) UL. UL, 333 Pfingsten Road, Northbrook, IL 60062, (847) 272-8800. ul.com.
(1) UL 448, (“ANSI/UL 448-2013”), “Standard for Safety Centrifugal Stationary Pumps for Fire-Protection Service,” 10th Edition, June 8, 2007, including revisions through July 12, 2013, IBR approved for §431.462.
(2) UL 1081, (“ANSI/UL 1081-2016”), “Standard for Swimming Pool Pumps, Filters, and Chlorinators,” 7th Edition, ANSI approved October 21, 2016, IBR approved for §431.462.
[81 FR 4145, Jan. 25, 2016, as amended at 82 FR 36920, Aug. 7, 2017]
(a) General pumps—(1) Scope. This paragraph (a) provides the test procedures for determining the constant and variable load pump energy index for:
(i) The following categories of clean water pumps:
(A) End suction close-coupled (ESCC);
(B) End suction frame mounted/own bearings (ESFM);
(C) In-line (IL);
(D) Radially split, multi-stage, vertical, in-line casing diffuser (RSV); and
(E) Submersible turbine (ST) pumps.
(ii) With the following characteristics:
(A) Flow rate of 25 gpm or greater at BEP and full impeller diameter;
(B) Maximum head of 459 feet at BEP and full impeller diameter and the number of stages required for testing (see section 1.2.2 of appendix A of this subpart);
(C) Design temperature range from 14 to 248 °F;
(D) Designed to operate with either:
(1) A 2- or 4-pole induction motor; or
(2) A non-induction motor with a speed of rotation operating range that includes speeds of rotation between 2,880 and 4,320 revolutions per minute (rpm) and/or 1,440 and 2,160 rpm, and in either case, the driver and impeller must rotate at the same speed;
(E) For ST pumps, a 6-inch or smaller bowl diameter; and
(F) For ESCC and ESFM pumps, a specific speed less than or equal to 5,000 when calculated using U.S. customary units.
(iii) Except for the following pumps:
(A) Fire pumps;
(B) Self-priming pumps;
(C) Prime-assist pumps;
(D) Magnet driven pumps;
(E) Pumps designed to be used in a nuclear facility subject to 10 CFR part 50, “Domestic Licensing of Production and Utilization Facilities”; and
(F) Pumps meeting the design and construction requirements set forth in Military Specifications: MIL-P-17639F, “Pumps, Centrifugal, Miscellaneous Service, Naval Shipboard Use” (as amended); MIL-P-17881D, “Pumps, Centrifugal, Boiler Feed, (Multi-Stage)” (as amended); MIL-P-17840C, “Pumps, Centrifugal, Close-Coupled, Navy Standard (For Surface Ship Application)” (as amended); MIL-P-18682D, “Pump, Centrifugal, Main Condenser Circulating, Naval Shipboard” (as amended); and MIL-P-18472G, “Pumps, Centrifugal, Condensate, Feed Booster, Waste Heat Boiler, And Distilling Plant” (as amended). Military specifications and standards are available for review at http://everyspec.com/MIL-SPECS.
(2) Testing and calculations. Determine the applicable constant load pump energy index (PEICL) or variable load pump energy index (PEIVL) using the test procedure set forth in appendix A of this subpart.
(b) Dedicated-purpose pool pumps—(1) Scope. This paragraph (b) provides the test procedures for determining the weighted energy factor (WEF), rated hydraulic horsepower, dedicated-purpose pool pump nominal motor horsepower, dedicated-purpose pool pump motor total horsepower, dedicated-purpose pool pump service factor, and other pump performance parameters for:
(i) The following varieties of dedicated-purpose pool pumps:
(A) Self-priming pool filter pumps;
(B) Non-self-priming pool filter pumps;
(C) Waterfall pumps; and
(D) Pressure cleaner booster pumps;
(ii) Served by single-phase or polyphase input power;
(iii) Except for:
(A) Submersible pumps; and
(B) Self-priming and non-self-priming pool filter pumps with hydraulic output power greater than or equal to 2.5 horsepower.
(2) Testing and calculations. Determine the weighted energy factor (WEF) using the test procedure set forth in appendix B or appendix C of this subpart, as applicable.
(a) For the purposes of paragraph (b) of this section, “PEICL” means the constant load pump energy index and “PEIVL” means the variable load pump energy index, both as determined in accordance with the test procedure in §431.464. For the purposes of paragraph (c) of this section, “BEP” means the best efficiency point as determined in accordance with the test procedure in §431.464.
(b) Each pump that is manufactured starting on January 27, 2020 and that:
(1) Is in one of the equipment classes listed in the table in paragraph (b)(4) of this section;
(2) Meets the definition of a clean water pump in §431.462;
(3) Is not listed in paragraph (c) of this section; and
(4) Conforms to the characteristics listed in paragraph (d) of this section must have a PEICL or PEIVL rating of not more than 1.00 using the appropriate C-value in the table in this paragraph (b)(4):
Equipment class1
Maximum PEI2
C-value3
ESCC.1800.CL 1.00 128.47
ESCC.3600.CL 1.00 130.42
ESCC.1800.VL 1.00 128.47
ESCC.3600.VL 1.00 130.42
ESFM.1800.CL 1.00 128.85
ESFM.3600.CL 1.00 130.99
ESFM.1800.VL 1.00 128.85
ESFM.3600.VL 1.00 130.99
IL.1800.CL 1.00 129.30
IL.3600.CL 1.00 133.84
IL.1800.VL 1.00 129.30
IL.3600.VL 1.00 133.84
RSV.1800.CL 1.00 129.63
RSV.3600.CL 1.00 133.20
RSV.1800.VL 1.00 129.63
RSV.3600.VL 1.00 133.20
ST.1800.CL 1.00 138.78
ST.3600.CL 1.00 134.85
ST.1800.VL 1.00 138.78
ST.3600.VL 1.00 134.85
1Equipment class designations consist of a combination (in sequential order separated by periods) of: (1) An equipment family (ESCC = end suction close-coupled, ESFM = end suction frame mounted/own bearing, IL = in-line, RSV = radially split, multi-stage, vertical, in-line diffuser casing, ST = submersible turbine; all as defined in §431.462); (2) nominal speed of rotation (1800 = 1800 rpm, 3600 = 3600 rpm); and (3) an operating mode (CL = constant load, VL = variable load). Determination of the operating mode is determined using the test procedure in appendix A to this subpart.
2For equipment classes ending in .CL, the relevant PEI is PEICL. For equipment classes ending in .VL, the relevant PEI is PEIVL.
3The C-values shown in this table must be used in the equation for PERSTD when calculating PEICL or PEIVL, as described in section II.B of appendix A to this subpart.
(c) The energy efficiency standards in paragraph (b) of this section do not apply to the following pumps:
(1) Fire pumps;
(2) Self-priming pumps;
(3) Prime-assist pumps;
(4) Magnet driven pumps;
(5) Pumps designed to be used in a nuclear facility subject to 10 CFR part 50, “Domestic Licensing of Production and Utilization Facilities”;
(6) Pumps meeting the design and construction requirements set forth in Military Specification MIL-P-17639F, “Pumps, Centrifugal, Miscellaneous Service, Naval Shipboard Use” (as amended); MIL-P-17881D, “Pumps, Centrifugal, Boiler Feed, (Multi-Stage)” (as amended); MIL-P-17840C, “Pumps, Centrifugal, Close-Coupled, Navy Standard (For Surface Ship Application)” (as amended); MIL-P-18682D, “Pump, Centrifugal, Main Condenser Circulating, Naval Shipboard” (as amended); MIL-P-18472G, “Pumps, Centrifugal, Condensate, Feed Booster, Waste Heat Boiler, And Distilling Plant” (as amended). Military specifications and standards are available for review at http://everyspec.com/MIL-SPECS.
(d) The energy conservation standards in paragraph (b) of this section apply only to pumps that have the following characteristics:
(1) Flow rate of 25 gpm or greater at BEP at full impeller diameter;
(2) Maximum head of 459 feet at BEP at full impeller diameter and the number of stages required for testing;
(3) Design temperature range from 14 to 248 °F;
(4) Designed to operate with either:
(i) A 2- or 4-pole induction motor; or
(ii) A non-induction motor with a speed of rotation operating range that includes speeds of rotation between 2,880 and 4,320 revolutions per minute and/or 1,440 and 2,160 revolutions per minute; and
(iii) In either case, the driver and impeller must rotate at the same speed;
(5) For ST pumps, a 6-inch or smaller bowl diameter; and
(6) For ESCC and ESFM pumps, specific speed less than or equal to 5,000 when calculated using U.S. customary units.
(e) For the purposes of paragraph (f) of this section, “WEF” means the weighted energy factor and “hhp” means the rated hydraulic horsepower, as determined in accordance with the test procedure in §431.464(b) and applicable sampling plans in §429.59 of this chapter.
(f) Each dedicated-purpose pool pump that is not a submersible pump and is manufactured starting on July 19, 2021 must have a WEF rating that is not less than the value calculated from the following table:
allowable WEF score
[kgal/kWh]
Minimum allowable WEF score
Dedicated-purpose pool pump
hhp Applicability
Self-priming pool filter pumps 0.711 hp ≤hhp <2.5 hp Single WEF = −2.30 * ln (hhp) + 6.59.
Self-priming pool filter pumps hhp <0.711 hp Single WEF = 5.55, for hhp ≤0.13 hp −1.30 * ln (hhp) + 2.90, for hhp >0.13 hp.
Non-self-priming pool filter pumps hhp <2.5 hp Any WEF = 4.60, for hhp ≤0.13 hp −0.85 * ln (hhp) + 2.87, for hhp >0.13 hp.
(g) Each integral cartridge filter pool pump and integral sand filter pool pump that is manufactured starting on July 19, 2021 must be distributed in commerce with a pool pump timer that is either integral to the pump or a separate component that is shipped with the pump.
(h) For all dedicated-purpose pool pumps distributed in commerce with freeze protection controls, the pump must be shipped with freeze protection disabled or with the following default, user-adjustable settings:
(1) The default dry-bulb air temperature setting is no greater than 40 °F;
(2) The default run time setting shall be no greater than 1 hour (before the temperature is rechecked); and
(3) The default motor speed shall not be more than 1⁄2 of the maximum available speed.
[81 FR 4431, Jan. 26, 2016, as amended at 82 FR 5742, Jan. 18, 2017]
Note: Starting on July 25, 2016, any representations made with respect to the energy use or efficiency of pumps subject to testing pursuant to 10 CFR 431.464(a) must be made in accordance with the results of testing pursuant to this appendix.
I. Test Procedure for Pumps
A. General. To determine the constant load pump energy index (PEICL) for bare pumps and pumps sold with electric motors or the variable load pump energy index (PEIVL) for pumps sold with electric motors and continuous or non-continuous controls, perform testing in accordance with HI 40.6-2014, except section 40.6.5.3, “Test report;” section A.7, “Testing at temperatures exceeding 30 °C (86 °F);” and appendix B, “Reporting of test results;” (incorporated by reference, see §431.463) with the modifications and additions as noted throughout the provisions below. Where HI 40.6-2014 refers to “pump,” the term refers to the “bare pump,” as defined in §431.462. Also, for the purposes of applying this appendix, the term “volume per unit time,” as defined in section 40.6.2, “Terms and definitions,” of HI 40.6-2014 shall be deemed to be synonymous with the term “flow rate” used throughout that standard and this appendix. In addition, the specifications of section 40.6.4.1 of HI 40.6-2014 do not apply to ST pumps and the performance of ST bare pumps considers the bowl performance only.
A.1 Scope. Section II of this appendix is applicable to all pumps and describes how to calculate the pump energy index (section II.A) based on the pump energy rating for the minimally compliant reference pump (PERSTD; section II.B) and the constant load pump energy rating (PERCL) or variable load pump energy rating (PERVL) determined in accordance with one of sections III through VII of this appendix, based on the configuration in which the pump is distributed in commerce and the applicable testing method specified in sections III through VII and as described in Table 1 of this appendix.
Table 1—Applicability of Calculation-Based and Testing-Based Test Procedure Options Based on Pump Configuration
Pump sub-configuration
Bare Pump Bare Pump
Pump + Single-Phase Induction Motor
Pump + Driver Other Than Electric Motor Section III: Test Procedure for Bare Pumps.
Pump + Motor* Pump + Polyphase Motor Covered by DOE's Electric Motor Energy Conservation Standards**
Pump + Submersible Motor Section IV: Testing-Based Approach for Pumps Sold with Motors
Section V: Calculation-Based Approach for Pumps Sold with Motors.
Pump + Motor Not Covered by DOE's Electric Motor Energy Conservation Standards (Except Submersible Motors)***** Section IV: Testing-Based Approach for Pumps Sold with Motors.
Pump + Motor + Continuous Controls
Pump + Motor + Non-Continuous Controls Pump + Polyphase Motor Covered by DOE's Electric Motor Energy Conservation Standards** + Continuous Control
Pump + Submersible Motor + Continuous Control Section VI: Testing-Based Approach for Pumps Sold with Motors and Controls
Section VII: Calculation-Based Approach for Pumps Sold with Motors Controls.
Pump + Polyphase Motor Covered by DOE's Electric Motor Energy Conservation Standards** + Non-Continuous Control
Pump + Submersible Motor + Non-Continuous Control Section VI: Testing-Based Approach for Pumps Sold with Motors and Controls.
Pump + Motor Not Covered by DOE's Electric Motor Energy Conservation Standards (Except Submersible Motors)***** + Continuous or Non-Continuous Controls Section VI: Testing-Based Approach for Pumps Sold with Motors and Controls.
*Also applies if unit is sold with controls other than continuous or non-continuous controls (e.g., ON/OFF switches).
**All references to “Motors Covered by DOE's Electric Motor Energy Conservation Standards” refer to those listed at §431.25(g) of this chapter.
***Includes pumps sold with single-phase induction motors.
A.2 Section III of this appendix addresses the test procedure applicable to bare pumps. This test procedure also applies to pumps sold with drivers other than motors and pumps sold with single-phase induction motors.
A.3 Section IV of this appendix addresses the testing-based approach for pumps sold with motors, which is applicable to all pumps sold with electric motors, including single-phase induction motors. This test procedure also applies to pumps sold with controls other than continuous or non-continuous controls (e.g., on/off switches).
A.4 Section V of this appendix addresses the calculation-based approach for pumps sold with motors, which applies to:
(1) Pumps sold with polyphase electric motors regulated by DOE's energy conservation standards for electric motors at §431.25(g), and
(2) Pumps sold with submersible motors.
A.5 Section VI of this appendix addresses the testing-based approach for pumps sold with motors and controls, which is applicable to all pumps sold with electric motors (including single-phase induction motors) and continuous or non-continuous controls.
A.6 Section VII of this appendix discusses the calculation-based approach for pumps sold with motors and controls, which applies to:
(1) Pumps sold with polyphase electric motors regulated by DOE's energy conservation standards for electric motors at §431.25(g) and continuous controls and
(2) Pumps sold with submersible motors and continuous controls.
B. Measurement Equipment. For the purposes of measuring pump power input, driver power input to the motor or controls, and pump power output, the equipment specified in HI 40.6-2014 Appendix C (incorporated by reference, see §431.463) necessary to measure head, speed of rotation, flow rate, temperature, torque, and electrical power must be used and must comply with the stated accuracy requirements in HI 40.6-2014 Table 40.6.3.2.3 except as noted in sections III.B, IV.B, V.B, VI.B, and VII.B of this appendix. When more than one instrument is used to measure a given parameter, the combined accuracy, calculated as the root sum of squares of individual instrument accuracies, must meet the specified accuracy requirements.
C. Test Conditions. Conduct testing at full impeller diameter in accordance with the test conditions, stabilization requirements, and specifications of HI 40.6-2014 (incorporated by reference, see §431.463) section 40.6.3, “Pump efficiency testing;” section 40.6.4, “Considerations when determining the efficiency of a pump;” section 40.6.5.4 (including appendix A), “Test arrangements;” and section 40.6.5.5, “Test conditions.”. For ST pumps, head measurements must be based on the bowl assembly total head as described in section A.5 of 40.6-2014 and the pump power input or driver power input, as applicable, must be based on the measured input power to the driver or bare pump, respectively; section 40.6.4.1, “vertically suspended pumps,” does not apply to ST pumps.
C.1 Nominal Speed of Rotation. Determine the nominal speed of rotation based on the range of speeds of rotation at which the pump is designed to operate, in accordance with sections I.C.1.1, I.C.1.2, I.C.1.3, I.C.1.4, or I.C.1.5 of this appendix, as applicable. When determining the range of speeds at which the pump is designed to operate, DOE will refer to published data, marketing literature, and other publically-available information about the pump model and motor, as applicable.
C.1.1 For pumps sold without motors, select the nominal speed of rotation based on the speed for which the pump is designed. For bare pumps designed for speeds of rotation including 2,880 to 4,320 revolutions per minute (rpm), the nominal speed of rotation shall be 3,600 rpm. For bare pumps designed for speeds of rotation including 1,440 to 2,160 rpm, the nominal speed of rotation shall be 1,800 rpm.
C.1.2 For pumps sold with 4-pole induction motors, the nominal speed of rotation shall be 1,800 rpm.
C.1.3 For pumps sold with 2-pole induction motors, the nominal speed of rotation shall be 3,600 rpm.
C.1.4 For pumps sold with non-induction motors where the operating range of the pump and motor includes speeds of rotation between 2,880 and 4,320 rpm, the nominal speed of rotation shall be 3,600 rpm.
C.1.5 For pumps sold with non-induction motors where the operating range of the pump and motor includes speeds of rotation between 1,440 and 2,160 rpm, the nominal speed of rotation shall be 1,800 rpm.
C.2 Multi-stage Pumps. For RSV and ST pumps, perform testing on the pump with three stages for RSV pumps and nine stages for ST pumps. If the basic model of pump being tested is only available with fewer than the required number of stages, test the pump with the maximum number of stages with which the basic model is distributed in commerce in the United States. If the basic model of pump being tested is only available with greater than the required number of stages, test the pump with the lowest number of stages with which the basic model is distributed in commerce in the United States. If the basic model of pump being tested is available with both fewer and greater than the required number of stages, but not the required number of stages, test the pump with the number of stages closest to the required number of stages. If both the next lower and next higher number of stages are equivalently close to the required number of stages, test the pump with the next higher number of stages.
C.3 Twin Head Pumps. For twin head pumps, perform testing on an equivalent single impeller IL pump, constructed by incorporating one of the driver and impeller assemblies of the twin head pump being rated into an adequate, IL style, single impeller volute and casing. An adequate, IL style, single impeller volute and casing means a volute and casing for which any physical and functional characteristics that affect energy consumption and energy efficiency are the same to their corresponding characteristics for a single impeller in the twin head pump volute and casing.
D.1 Damping Devices. Use of damping devices, as described in section 40.6.3.2.2 of HI 40.6−2014 (incorporated by reference, see §431.463), are only permitted to integrate up to the data collection interval used during testing.
D.2 Stabilization. Record data at any tested load point only under stabilized conditions, as defined in HI 40.6-2014 section 40.6.5.5.1 (incorporated by reference, see §431.463), where a minimum of two measurements are used to determine stabilization.
D.3 Calculations and Rounding. Normalize all measured data to the nominal speed of rotation of 3,600 or 1,800 rpm based on the nominal speed of rotation selected for the pump in section I.C.1 of this appendix, in accordance with the procedures specified in section 40.6.6.1.1 of HI 40.6-2014 (incorporated by reference, see §431.463). Except for the “expected BEP flow rate,” all terms and quantities refer to values determined in accordance with the procedures set forth in this appendix for the rated pump. Perform all calculations using raw measured values without rounding. Round PERCL and PERVL to three significant digits, and round PEICL, and PEIVL values, as applicable, to the hundredths place (i.e., 0.01).
D.4 Pumps with BEP at Run Out.
Test pumps for which the expected BEP corresponds to a volume rate of flow that is within 20 percent of the expected maximum flow rate at which the pump is designed to operate continuously or safely (i.e., pumps with BEP at run-out) in accordance with the test procedure specified in this appendix, but with the following exceptions:
(1) Use the following seven flow points for determination of BEP in sections III.D, IV.D, V.D, VI.D, and VII.D of this appendix instead of those specified in those sections: 40, 50, 60, 70, 80, 90, and 100 percent of the expected.
(2) Use flow points of 60, 70, 80, 90, and 100 percent of the expected maximum flow rate of the pump to determine pump power input or driver power input at the specified load points in section III.E.1.1, IV.E.1, V.E.1.1, VI.E.1, and VII.E.1.1 of this appendix instead of those specified in those sections.
(3) To determine of PERCL and PERSTD, use load points of 65, 90, and 100 percent of the BEP flow rate determined with the modified flow points specified in this section I.D.4 of this appendix instead of 75, 100, and 110 percent of BEP flow.
II. Calculation of the Pump Energy Index
A. Determine the PEI of each tested pump based on the configuration in which it is sold, as follows:
A.1. For pumps rated as bare pumps or pumps sold with motors, determine the PEICL using the following equation:
PEICL = the pump energy index for a constant load (hp),
PERCL = the pump energy rating for a constant load (hp), determined in accordance with either section III (for bare pumps, pumps sold with single-phase induction motors, and pumps sold with drivers other than electric motors), section IV (for pumps sold with motors and rated using the testing-based approach), or section V (for pumps sold with motors and rated using the calculation-based approach) of this appendix, and
PERSTD = the PERCL for a pump that is minimally compliant with DOE's energy conservation standards with the same flow and specific speed characteristics as the tested pump (hp), as determined in accordance with section II.B of this appendix.
A.2 For pumps rated as pumps sold with motors and continuous controls or non-continuous controls, determine the PEIVL using the following equation:
PEIVL = the pump energy index for a variable load,
PERVL = the pump energy rating for a variable load (hp) determined in accordance with section VI (for pumps sold with motors and continuous or non-continuous controls rated using the testing-based approach) or section VII of this appendix (for pumps sold with motors and continuous controls rated using the calculation-based approach), and
B. Determine the pump energy rating for the minimally compliant reference pump (PERSTD), according to the following equation:
PERSTD = the PERCL for a pump that is minimally compliant with DOE's energy conservation standards with the same flow and specific speed characteristics as the tested pump (hp),
ωi = 0.3333,
Piin,m = calculated driver power input to the motor at load point i for the minimally compliant pump (hp), calculated in accordance with section II.B.1of this appendix, and
i = load point corresponding to 75, 100, or 110 percent of the BEP flow rate.
B.1. Determine the driver power input at each load point corresponding to 75, 100, or 110 percent of the BEP flow rate as follows:
Piin,m = driver power input to the motor at load point i (hp),
Pi = pump power input to the bare pump at load point i (hp), calculated in accordance with section II.B.1.1 of this appendix,
Li = the part load motor losses at load point i (hp), calculated in accordance with section II.B.1.2 of this appendix, and
B.1.1. Determine the pump power input to the minimally compliant pump at each load point corresponding to 75, 100, or 110 percent of the BEP flow rate as follows:
Pi = pump power input to the bare pump at load point i (hp),
αi = 0.947 for 75 percent of the BEP flow rate, 1.000 for 100 percent of the BEP flow rate, and 0.985 for 110 percent of the BEP flow rate;
Pu,i = the pump power output at load point i of the tested pump (hp), as determined in accordance with section II.B.1.1.2 of this appendix;
ηpump,STD = the minimally compliant pump efficiency (%), calculated in accordance with section II.B.1.1.1 of this appendix; and
B.1.1.1 Calculate the minimally compliant pump efficiency based on the following equation:
ηpump,STD = −0.8500 × ln(Q100%)2 −0.3800 × ln(Ns) × ln(Q100%) − 11.480 × ln(Ns)2 + 17.800 × ln(Q100%) + 179.80 × ln(Ns) − (C + 555.60
ηpump,STD = minimally compliant pump efficiency (%),
Q100% = the BEP flow rate of the tested pump at full impeller and nominal speed of rotation (gpm),
Ns = specific speed of the tested pump determined in accordance with section II.B.1.1.1.1 of this appendix, and
C = the appropriate C-value for the category and nominal speed of rotation of the tested pump, as listed at §431.466.
B.1.1.1.1 Determine the specific speed of the rated pump using the following equation:
Ns = specific speed,
nsp = the nominal speed of rotation (rpm),
Q100% = the measured BEP flow rate of the tested pump at full impeller and nominal speed of rotation (gpm),
H100% = pump total head at 100 percent of the BEP flow rate of the tested pump at full impeller and nominal speed of rotation (ft), and
S = the number of stages with which the pump is being rated.
B.1.1.2 Determine the pump power output at each load point corresponding to 75, 100, or 110 percent of the BEP flow rate using the following equation:
Pu,i = the measured pump power output at load point i of the tested pump (hp),
Qi = the measured flow rate at load point i of the tested pump (gpm),
Hi = pump total head at load point i of the tested pump (ft),
SG = the specific gravity of water at specified test conditions, which is equivalent to 1.00, and
B.1.2 Determine the motor part load losses at each load point corresponding to 75, 100, or 110 percent of the BEP flow rate as follows:
Li = Lfull × yi
Li = part load motor losses at load point i (hp),
Lfull = motor losses at full load (hp), as determined in accordance with section II.B.1.2.1 of this appendix,
yi = part load loss factor at load point i determined in accordance with section II.B.1.2.2 of this appendix, and
B.1.2.1 Determine the full load motor losses using the appropriate motor efficiency value and horsepower as shown in the following equation:
Lfull = motor losses at full load (hp),
MotorHP = the motor horsepower as determined in accordance with section II.B.1.2.1.1 of this appendix (hp), and
ηmotor,full = the default nominal full load motor efficiency as determined in accordance with section II.B.1.2.1.2 of this appendix (%).
B.1.2.1.1 Determine the motor horsepower as follows:
• For bare pumps other than ST pumps, the motor horsepower is determined as the horsepower rating listed in Table 2 of this appendix that is either equivalent to, or the next highest horsepower greater than, the pump power input to the bare pump at 120 percent of the BEP flow rate of the tested pump.
• For ST bare pumps, the motor horsepower is determined as the horsepower rating listed in Table 2 of this appendix that, is either equivalent to, or the next highest horsepower greater than, the pump power input to the bare pump at 120 percent of the BEP flow rate of the tested pump divided by a service factor of 1.15.
• For pumps sold with motors, pumps sold with motors and continuous controls, or pumps sold with motors and non-continuous controls, the motor horsepower is the rated horsepower of the motor with which the pump is being tested.
B.1.2.1.2 Determine the default nominal full load motor efficiency as described in section II.B.1.2.1.2.1 of this appendix for pumps other than ST pumps or II.B.1.2.1.2.2 of this appendix for ST pumps.
B.1.2.1.2.1. For pumps other than ST pumps, the default nominal full load motor efficiency is the minimum of the nominal full load motor efficiency standards (open or enclosed) from the table containing the current energy conservation standards for NEMA Design B motors at §431.25, with the number of poles relevant to the speed at which the pump is being tested (see section I.C.1 of this appendix) and the motor horsepower determined in section II.B.1.2.1.1 of this appendix.
B.1.2.1.2.2. For ST pumps, the default nominal full load motor efficiency is the default nominal full load submersible motor efficiency listed in Table 2 of this appendix, with the number of poles relevant to the speed at which the pump is being tested (see section I.C.1 of this appendix) and the motor horsepower determined in section II.B.1.2.1.1 of this appendix.
B.1.2.2 Determine the part load loss factor at each load point corresponding to 75, 100, or 110 percent of the BEP flow rate as follows:
yi = the part load loss factor at load point i,
MotorHP = the motor horsepower (hp), as determined in accordance with section II.B.1.2.1.1 of this appendix,
III. Test Procedure for Bare Pumps
A. Scope. This section III applies only to:
(1) Bare pumps,
(2) Pumps sold with drivers other than electric motors, and
(3) Pumps sold with single-phase induction motors.
B. Measurement Equipment. The requirements regarding measurement equipment presented in section I.B of this appendix apply to this section III, and in addition, when testing pumps using a calibrated motor:
(1) Electrical measurement equipment must be capable of measuring true RMS current, true RMS voltage, and real power up to the 40th harmonic of fundamental supply source frequency, and
(2) Any instruments used to measure a particular parameter specified in paragraph (1) must have a combined accuracy of ±2.0 percent of the measured value at the fundamental supply source frequency, where combined accuracy is the root sum of squares of individual instrument accuracies.
C. Test Conditions. The requirements regarding test conditions presented in section I.C of this appendix apply to this section III. When testing pumps using a calibrated motor the following conditions also apply to the mains power supplied to the motor:
(1) Maintain the voltage within ±5 percent of the rated value of the motor,
(2) Maintain the frequency within ±1 percent of the rated value of the motor,
(3) Maintain the voltage unbalance of the power supply within ±3 percent of the rated values of the motor, and
(2) Maintain total harmonic distortion below 12 percent throughout the test.
D. Testing BEP for the Pump. Determine the best efficiency point (BEP) of the pump as follows:
D.1. Adjust the flow by throttling the pump without changing the speed of rotation of the pump and conduct the test at a minimum of the following seven flow points: 40, 60, 75, 90, 100, 110, and 120 percent of the expected BEP flow rate of the pump at the nominal speed of rotation, as specified in HI 40.6-2014, except section 40.6.5.3, section A.7, and appendix B (incorporated by reference, see §431.463).
D.2. Determine the BEP flow rate as the flow rate at the operating point of maximum pump efficiency on the pump efficiency curve, as determined in accordance with section 40.6.6.3 of HI 40.6-2014 (incorporated by reference, see §431.463), where the pump efficiency is the ratio of the pump power output divided by the pump power input, as specified in Table 40.6.2.1 of HI 40.6-2014, disregarding the calculations provided in section 40.6.6.2.
E. Calculating the Constant Load Pump Energy Rating. Determine the PERCL of each tested pump using the following equation:
PERCL = the pump energy rating for a constant load (hp),
Piin,m = calculated driver power input to the motor at load point i (hp), as determined in accordance with section III.E.1 of this appendix, and
E.1 Determine the driver power input at each load point corresponding to 75, 100, or 110 percent of the BEP flow rate as follows:
Pi = pump power input to the bare pump at load point i (hp), as determined in section III.E.1.1 of this appendix,
Li = the part load motor losses at load point i (hp), as determined in accordance with section III.E.1.2 of this appendix, and
E.1.1 Determine the pump power input at 75, 100, 110, and 120 percent of the BEP flow rate by employing a least squares regression to determine a linear relationship between the pump power input at the nominal speed of rotation of the pump and the measured flow rate at the following load points: 60, 75, 90, 100, 110, and 120 percent of the expected BEP flow rate. Use the linear relationship to determine the pump power input at the nominal speed of rotation for the load points of 75, 100, 110, and 120 percent of the BEP flow rate.
E.1.2 Determine the motor part load losses at each load point corresponding to 75, 100, or 110 percent of the BEP flow rate as follows:
Li = motor losses at load point i (hp),
Lfull = motor losses at full load (hp), as determined in accordance with section III.E.1.2.1 of this appendix,
yi = loss factor at load point i as determined in accordance with section III.E.1.2.2 of this appendix, and
E.1.2.1 Determine the full load motor losses using the appropriate motor efficiency value and horsepower as shown in the following equation:
Lfull = motor losses at full load (hp);
MotorHP = the motor horsepower (hp), as determined in accordance with section II.E.1.2.1.1 of this appendix, and
ηmotor,full = the default nominal full load motor efficiency (%), as determined in accordance with section III.E.1.2.1.2 of this appendix.
E.1.2.1.1 Determine the motor horsepower as follows:
• For bare pumps other than ST pumps, determine the motor horsepower by selecting the horsepower rating listed in Table 2 of this appendix that is either equivalent to, or the next highest horsepower greater than, the pump power input to the bare pump at 120 percent of the BEP flow rate of the tested pump.
• For ST bare pumps, determine the motor horsepower by selecting the horsepower rating listed in Table 2 of this appendix that, is either equivalent to, or the next highest horsepower greater than, the pump power input to the bare pump at 120 percent of the BEP flow rate of the tested pump divided by a service factor of 1.15.
E.1.2.1.2 Determine the default nominal full load motor efficiency as described in section III.E.1.2.1.2.1 of this appendix for pumps other than ST pumps or III.E.1.2.1.2.2. of this appendix for ST pumps.
E.1.2.1.2.1. For pumps other than ST pumps, the default nominal full load motor efficiency is the minimum of the nominal full load motor efficiency standards (open or enclosed) from the table containing the current energy conservation standards for NEMA Design B motors at §431.25, with the number of poles relevant to the speed at which the pump is being tested (see section I.C.1 of this appendix) and the motor horsepower determined in section III.E.1.2.1.1 of this appendix.
E.1.2.1.2.2. For ST pumps, the default nominal full load motor efficiency is the default nominal full load submersible motor efficiency listed in Table 2 of this appendix, with the number of poles relevant to the speed at which the pump is being tested (see section I.C.1 of this appendix) and the motor horsepower determined in section III.E.1.2.1.1 of this appendix;
E.1.2.2 Determine the loss factor at each load point corresponding to 75, 100, or 110 percent of the BEP flow rate as follows:
Pi = pump power input to the bare pump at load point i (hp), as determined in accordance with section III.E.1.1 of this appendix,
MotorHP = as determined in accordance with section III.E.1.2.1 of this appendix (hp),
IV. Testing-Based Approach for Pumps Sold With Motors
A. Scope. This section IV applies only to pumps sold with electric motors, including single-phase induction motors.
B. Measurement Equipment. The requirements regarding measurement equipment presented in section I.B of this appendix apply to this section IV, and in addition, the electrical measurement equipment must:
(1) Be capable of measuring true RMS current, true RMS voltage, and real power up to the 40th harmonic of fundamental supply source frequency, and
(2) For all instruments used to measure a given parameter, have a combined accuracy of ±2.0 percent of the measured value at the fundamental supply source frequency, where combined accuracy is the root sum of squares of individual instrument accuracies.
C. Test Conditions. The requirements regarding test conditions presented in section I.C of this appendix apply to this section IV. The following conditions also apply to the mains power supplied to the motor:
(4) Maintain total harmonic distortion below 12 percent throughout the test.
D. Testing BEP for the Pump. Determine the BEP of the pump as follows:
D.1 Adjust the flow by throttling the pump without changing the speed of rotation of the pump to a minimum of seven flow points: 40, 60, 75, 90, 100, 110, and 120 percent of the expected BEP flow rate of the pump at the nominal speed of rotation, as specified in HI 40.6-2014, except section 40.6.5.3, section A.7, and appendix B (incorporated by reference, see §431.463).
D.2. Determine the BEP flow rate as the flow rate at the operating point of maximum overall efficiency on the pump efficiency curve, as determined in accordance with section 40.6.6.3 of HI 40.6-2014 (incorporated by reference, see §431.463), where the overall efficiency is the ratio of the pump power output divided by the driver power input, as specified in Table 40.6.2.1 of HI 40.6-2014, disregarding the calculations provided in section 40.6.6.2.
Piin = measured driver power input to the motor at load point i (hp) for the tested pump as determined in accordance with section IV.E.1 of this appendix, and
E.1 Determine the driver power input at 75, 100, and 110 percent of the BEP flow rate by employing a least squares regression to determine a linear relationship between the driver power input at the nominal speed of rotation of the pump and the measured flow rate at the following load points: 60, 75, 90, 100, 110, and 120 percent of the expected BEP flow rate. Use the linear relationship to determine the driver power input at the nominal speed of rotation for the load points of 75, 100, and 110 percent of the BEP flow rate.
V. Calculation-Based Approach for Pumps Sold With Motors
A. Scope. This section V can only be used in lieu of the test method in section IV of this appendix to calculate the index for pumps sold with motors listed in section V.A.1 or V.A.2 of this appendix.
A.1 Pumps sold with motors subject to DOE's energy conservation standards for polyphase electric motors at §431.25(g), and
A.2. Pumps sold with submersible motors.
A.3. Pumps sold with motors not listed in sections V.A.1 or V.A.2 of this appendix cannot use this section V and must apply the test method in section IV of this appendix.
B. Measurement Equipment. The requirements regarding measurement equipment presented in section I.B of this appendix apply to this section V, and in addition, when testing pumps using a calibrated motor electrical measurement equipment must:
C. Test Conditions. The requirements regarding test conditions presented in section I.C of this appendix apply to this section V. When testing pumps using a calibrated motor the following conditions also apply to the mains power supplied to the motor:
D. Testing BEP for the Bare Pump. Determine the best efficiency point (BEP) of the pump as follows:
D.2. Determine the BEP flow rate as the flow rate at the operating point of maximum pump efficiency on the pump efficiency curve, as determined in accordance with section 40.6.6.3 of HI 40.6-2014 (incorporated by reference, see §431.463), where pump efficiency is the ratio of the pump power output divided by the pump power input, as specified in Table 40.6.2.1 of HI 40.6-2014 and the calculations provided in section 40.6.6.2 are to be disregarded.
Piin,m = calculated driver power input to the motor at load point i for the tested pump as determined in accordance with section V.E.1 of this appendix (hp), and
Pi = pump power input to the bare pump at load point i, as determined in section V.E.1.1 of this appendix (hp),
Li = the part load motor losses at load point i as determined in accordance with section V.E.1.2 of this appendix (hp), and
Lfull = motor losses at full load as determined in accordance with section V.E.1.2.1 of this appendix (hp),
yi = part load loss factor at load point i as determined in accordance with section V.E.1.2.2 of this appendix, and
MotorHP = the horsepower of the motor with which the pump model is being tested (hp), and
ηmotor,full = the represented nominal full load motor efficiency (i.e., nameplate/DOE-certified value) or default nominal full load submersible motor efficiency as determined in accordance with section V.E.1.2.1.1 of this appendix (%).
E.1.2.1.1 For pumps sold with motors other than submersible motors, determine the represented nominal full load motor efficiency as described in section V.E.1.2.1.1.1 of this appendix. For pumps sold with submersible motors determine the default nominal full load submersible motor efficiency as described in section V.E.1.2.1.1.2 of this appendix.
E.1.2.1.1.1. For pumps sold with motors other than submersible motors, the represented nominal full load motor efficiency is that of the motor with which the given pump model is being tested, as determined in accordance with the DOE test procedure for electric motors at §431.16 and applicable representation procedures in parts 429 and 430.
E.1.2.1.1.2. For pumps sold with submersible motors, the default nominal full load submersible motor efficiency is that listed in Table 2 of this appendix, with the number of poles relevant to the speed at which the pump is being tested (see section I.C.1 of this appendix) and the motor horsepower of the pump being tested.
Pi = the pump power input to the bare pump at load point i as determined in accordance with section V.E.1.1 of this appendix (hp),
MotorHP = the horsepower of the motor with which the pump model is being tested (hp),
i = load point corresponding to 75, 100, or 110 percent of the BEP flow rate, and
in the equation in this section V.E.1.2.2. of this appendix to calculate the part load loss factor at each load point
VI. Testing-Based Approach for Pumps Sold with Motors and Controls
A. Scope. This section VI applies only to pumps sold with electric motors, including single-phase induction motors, and continuous or non-continuous controls. For the purposes of this section VI, all references to “driver input power” in this section VI or HI 40.6-2014 (incorporated by reference, see §431.463) refer to the input power to the continuous or non-continuous controls.
B. Measurement Equipment. The requirements regarding measurement equipment presented in section I.B of this appendix apply to this section VI, and in addition electrical measurement equipment must:
C. Test Conditions. The requirements regarding test conditions presented in section I.C of this appendix apply to this section VI. The following conditions also apply to the mains power supplied to the continuous or non-continuous control:
D.1. Adjust the flow by throttling the pump without changing the speed of rotation of the pump to a minimum of seven flow points: 40, 60, 75, 90, 100, 110, and 120 percent of the expected BEP flow rate of the pump at the nominal speed of rotation, as specified in HI 40.6-2014, except section 40.6.5.3, section A.7, and appendix B (incorporated by reference, see §431.463).
D.2. Determine the BEP flow rate as the flow rate at the operating point of maximum overall efficiency on the pump efficiency curve, as determined in accordance with section 40.6.6.3 of HI 40.6-2014 (incorporated by reference, see §431.463), where overall efficiency is the ratio of the pump power output divided by the driver power input, as specified in Table 40.6.2.1 of HI 40.6-2014 and the calculations provided in section 40.6.6.2 are to be disregarded.
E. Calculating the Variable Load Pump Energy Rating. Determine the PERVL of each tested pump using the following equation:
PERVL = the pump energy rating for a variable load (hp);
ωi = 0.25;
Piin,c = the normalized driver power input to continuous or non-continuous controls at load point i for the tested pump as determined in accordance with section VI.E.1 of this appendix; and
i = load point corresponding 25, 50, 75, or 100 percent of the BEP flow rate.
E.1. Determine the driver power input at 100 percent of the measured BEP flow rate of the tested pump by employing a least squares regression to determine a linear relationship between the measured driver power input at the nominal speed of rotation of the pump and the measured flow rate, using the following load points: 60, 75, 90, 100, 110, and 120 percent of the expected BEP flow rate. Use the linear relationship to determine the driver power input at the nominal speed of rotation for the load point of 100 percent of the measured BEP flow rate of the tested pump.
E.2 Determine the driver power input at 25, 50, and 75 percent of the BEP flow rate by measuring the driver power input at the load points defined by:
(1) Those flow rates, and
(2) The associated head points calculated according to the following reference system curve equation:
Hi = pump total head at load point i (ft),
H100% = pump total head at 100 percent of the BEP flow rate and nominal speed of rotation (ft),
Qi = flow rate at load point i (gpm),
Q100% = flow rate at 100 percent of the BEP flow rate and nominal speed of rotation (gpm), and
i = load point corresponding to 25, 50, or 75 percent of the measured BEP flow rate of the tested pump.
E.2.1. For pumps sold with motors and continuous controls, the specific head and flow points must be achieved within 10 percent of the calculated values and the measured driver power input must be corrected to the exact intended head and flow conditions using the following equation:
Piin,c = the corrected driver power input to the continuous or non-continuous controls at load point i (hp),
Hsp,i = the specified total system head at load point i based on the reference system curve (ft),
HM,j = the measured total system head at load point j (ft),
Qsp,i = the specified total system flow rate at load point i based on the reference system curve (gpm),
QM,j = the measured total system flow rate at load point j (gpm),
PM,jin,c = the measured normalized driver power input to the continuous or non-continuous controls at load point j (hp),
i = specified load point at 25, 50, 75, or 100 percent of BEP flow, and
j = measured load point corresponding to specified load point i.
E.2.2. For pumps sold with motors and non-continuous controls, the head associated with each of the specified flow points shall be no lower than 10 percent below that defined by the reference system curve equation in section VI.E.2 of this appendix. Only the measured flow points must be achieved within 10 percent of the calculated values. Correct for flow and head as described in section VI.E.2.1, except do not correct measured head values that are higher than the reference system curve at the same flow rate; only correct flow rate and head values lower than the reference system curve at the same flow rate. For head values higher than the system curve, use the measured head points directly to calculate PEIVL.
VII. Calculation-Based Approach for Pumps Sold With Motors and Controls
A. Scope. This section VII can only be used in lieu of the test method in section VI of this appendix to calculate the index for pumps listed in section VII.A.1 or VII.A.2 of this appendix.
A.1. Pumps sold with motors regulated by DOE's energy conservation standards for polyphase NEMA Design B electric motors at §431.25(g) and continuous controls, and
A.2. Pumps sold with submersible motors and continuous controls.
A.3. Pumps sold with motors not listed in VII.A.1 or VII.A.2 of this appendix and pumps sold without continuous controls, including pumps sold with non-continuous controls, cannot use this section and must apply the test method in section VI of this appendix.
B. Measurement Equipment. The requirements regarding measurement equipment presented in section I.B of this appendix apply to this section VII, and in addition, when testing pumps using a calibrated motor electrical measurement equipment must:
C. Test Conditions. The requirements regarding test conditions presented in section I.C of this appendix apply to this section VII. When testing pumps using a calibrated motor the following conditions also apply to the mains power supplied to the motor:
D. Testing BEP for the Bare Pump. Determine the BEP of the pump as follows:
Piin,c = the calculated driver power input to the continuous or non-continuous controls at load point i for the tested pump as determined in accordance with section VII.E.1 of this appendix; and
i = load point corresponding to 25, 50, 75, or 100 percent of the BEP flow rate.
E.1 Determine the driver power input at each load point corresponding to 25, 50, 75, or 100 percent of the BEP flow rate as follows:
Piin,c = driver power input at to the continuous or non-continuous controls at load point i (hp),
Pi = pump power input to the bare pump at load point i as determined in accordance with section VII.E.1.1 of this appendix (hp),
Li = the part load motor and control losses at load point i as determined in accordance with section VII.E.1.2 of this appendix (hp), and
E.1.1 Determine the pump power input at 100 percent of the measured BEP flow rate of the tested pump by employing a least squares regression to determine a linear relationship between the measured pump power input at the nominal speed of rotation and the measured flow rate at the following load points: 60, 75, 90, 100, 110, and 120 percent of the expected BEP flow rate. Use the linear relationship to determine the pump power input at the nominal speed of rotation for the load point of 100 percent of the BEP flow rate.
E.1.1.1 Determine the pump power input at 25, 50, and 75 percent of the BEP flow rate based on the measured pump power input at 100 percent of the BEP flow rate and using with the following equation:
Pi = pump power input at load point i (hp);
P100% = pump power input at 100 percent of the BEP flow rate and nominal speed of rotation (hp);
Qi = flow rate at load point i (gpm);
Q100% = flow rate at 100 percent of the BEP flow rate and nominal speed of rotation (gpm); and
E.1.2 Calculate the motor and control part load losses at each load point corresponding to 25, 50, 75, and 100 percent of the BEP flow rate as follows:
Li = Lfull × zi
Li = motor and control losses at load point i (hp),
Lfull = motor losses at full load as determined in accordance with section VII.E.1.2.1 of this appendix (hp),
zi = part load loss factor at load point i as determined in accordance with section VII.E.1.2.2 of this appendix, and
ηmotor,full = the represented nominal full load motor efficiency (i.e., nameplate/DOE-certified value) or default nominal full load submersible motor efficiency as determined in accordance with section VII.E.1.2.1.1 of this appendix (%).
E.1.2.1.1 For pumps sold with motors other than submersible motors, determine the represented nominal full load motor efficiency as described in section VII.E.1.2.1.1.1 of this appendix. For pumps sold with submersible motors, determine the default nominal full load submersible motor efficiency as described in section VII.E.1.2.1.1.2 of this appendix.
E.1.2.1.1.1 For pumps sold with motors other than submersible motors, the represented nominal full load motor efficiency is that of the motor with which the given pump model is being tested, as determined in accordance with the DOE test procedure for electric motors at §431.16 and applicable representation procedures in parts 429 and 430.
E.1.2.1.1.2 For pumps sold with submersible motors, the default nominal full load submersible motor efficiency is that listed in Table 2 of this appendix, with the number of poles relevant to the speed at which the pump is being tested (see section I.C.1 of this appendix) and the motor horsepower of the pump being tested.
E.1.2.2 For load points corresponding to 25, 50, 75, and 100 percent of the BEP flow rate, determine the part load loss factor at each load point as follows:
zi = the motor and control part load loss factor at load point i,
a,b,c = coefficients listed in Table 4 of this appendix based on the horsepower of the motor with which the pump is being tested,
Pi = the pump power input to the bare pump at load point i, as determined in accordance with section VII.E.1.1 of this appendix (hp),
MotorHP = the horsepower of the motor with which the pump is being tested (hp),
Table 2—Default Nominal Full Load Submersible Motor Efficiency by Motor Horsepower and Pole
Default nominal full load
submersible motor efficiency
1.5 66 70
2 68 70
3 70 75.5
5 74 75.5
7.5 68 74
10 70 74
15 72 75.5
20 72 77
25 74 78.5
40 78.5 81.5
50 80 82.5
60 81.5 84
75 81.5 85.5
100 81.5 84
125 84 84
150 84 85.5
200 85.5 86.5
250 86.5 86.5
Table 3—Nominal Full Load Motor Efficiency Values
Nominal full load motor efficiency*
*Note: Each consecutive incremental value of nominal efficiency represents one band.
Table 4—Motor and Control Part Load Loss Factor Equation Coefficients for Section VII.E.1.2.2 of This Appendix A
Coefficients for Motor and Control Part Load Loss
Factor (zi)
≤5 − 0.4658 1.4965 0.5303
>5 and ≤20 − 1.3198 2.9551 0.1052
>20 and ≤50 − 1.5122 3.0777 0.1847
>50 − 0.8914 2.8846 0.2625
[81 FR 4145, Jan. 25, 2016, as amended at 82 FR 36924, Aug. 7, 2017]
Note: On February 5, 2018 but before July 19, 2021, any representations made with respect to the energy use or efficiency of dedicated-purpose pool pumps subject to testing pursuant to 10 CFR 431.464(b) must be made in accordance with the results of testing pursuant to this appendix. Any optional representations of energy factor (EF) must be accompanied by a representation of weighted energy factor (WEF).
I. Test Procedure for Dedicated-Purpose Pool Pumps
A.1 Test Method. To determine the weighted energy factor (WEF) for dedicated-purpose pool pumps, perform “wire-to-water” testing in accordance with HI 40.6-2014-B, except section 40.6.4.1, “Vertically suspended pumps”; section 40.6.4.2, “Submersible pumps”; section 40.6.5.3, “Test report”; section 40.6.5.5, “Test conditions”; section 40.6.5.5.2, “Speed of rotation during testing”; section 40.6.6.1, “Translation of test results to rated speed of rotation”; section 40.6.6.2, “Pump efficiency”; section 40.6.6.3, “Performance curve”; section A.7, “Testing at temperatures exceeding 30 °C (86 °F)”; and appendix B, “Reporting of test results”; (incorporated by reference, see §431.463) with the modifications and additions as noted throughout the provisions below. Do not use the test points specified in section 40.6.5.5.1, “Test procedure” of HI 40.6-2014-B and instead use those test points specified in section D.3 of this appendix for the applicable dedicated-purpose pool pump variety and speed configuration. When determining overall efficiency, best efficiency point, or other applicable pump energy performance information, section 40.6.5.5.1, “Test procedure”; section 40.6.6.2, “Pump efficiency”; and section 40.6.6.3, “Performance curve” must be used, as applicable. For the purposes of applying this appendix, the term “volume per unit time,” as defined in section 40.6.2, “Terms and definitions,” of HI 40.6-2014-B shall be deemed to be synonymous with the term “flow rate” used throughout that standard and this appendix.
A.2. Calculations and Rounding. All terms and quantities refer to values determined in accordance with the procedures set forth in this appendix for the rated pump. Perform all calculations using raw measured values without rounding. Round WEF, EF, maximum head, vertical lift, and true priming time values to the tenths place (i.e., 0.1) and rated hydraulic horsepower to the thousandths place (i.e., 0.001). Round all other reported values to the hundredths place unless otherwise specified.
B. Measurement Equipment
B.1 For the purposes of measuring flow rate, speed of rotation, temperature, and pump power output, the equipment specified in HI 40.6-2014-B Appendix C (incorporated by reference, see §431.463) necessary to measure head, speed of rotation, flow rate, and temperature must be used and must comply with the stated accuracy requirements in HI 40.6-2014-B Table 40.6.3.2.3, except as specified in section B.1.1 and B.1.2 of this appendix. When more than one instrument is used to measure a given parameter, the combined accuracy, calculated as the root sum of squares of individual instrument accuracies, must meet the specified accuracy requirements.
B.1.1 Electrical measurement equipment for determining the driver power input to the motor or controls must be capable of measuring true root mean squared (RMS) current, true RMS voltage, and real power up to the 40th harmonic of fundamental supply source frequency, and have a combined accuracy of ±2.0 percent of the measured value at the fundamental supply source frequency.
B.1.2 Instruments for measuring distance (e.g., height above the reference plane or water level) must be accurate to and have a resolution of at least ±0.1 inch.
B.2 Calibration. Calibration requirements for instrumentation are specified in appendix D of HI 40.6-2014-B (incorporated by reference, see §431.463). Historical calibration data may be used to justify time periods up to three times longer than those specified in table D.1 of HI 40.6-2014-B provided the supporting historical data shows maintenance of calibration of the given instrument up to the selected extended calibration interval on at least two unique occasions, based on the interval specified in HI 40.6-2014-B.
C. Test Conditions and Tolerances
C.1 Pump Specifications. Conduct testing at full impeller diameter in accordance with the test conditions, stabilization requirements, and specifications of HI 40.6-2014-B section 40.6.3, “Pump efficiency testing”; section 40.6.4, “Considerations when determining the efficiency of a pump”; section 40.6.5.4 (including appendix A), “Test arrangements”; and section 40.6.5.5, “Test conditions” (incorporated by reference, see §431.463).
C.2 Power Supply Requirements. The following conditions also apply to the mains power supplied to the DPPP motor or controls, if any:
(3) Maintain the voltage unbalance of the power supply within ±3 percent of the value with which the motor was rated, and
C.3 Test Conditions. Testing must be carried out with water that is between 50 and 107 °F with less than or equal to 15 nephelometric turbidity units (NTU).
C.4 Tolerances. For waterfall pumps, multi-speed self-priming and non-self-priming pool filter pumps, and variable-speed self-priming and non-self-priming pool filter pumps all measured load points must be within ±2.5 percent of the specified head value and comply with any specified flow values or thresholds. For all other dedicated-purpose pool pumps, all measured load points must be within the greater of ±2.5 percent of the specified flow rate values or ±0.5 gpm and comply with any specified head values or thresholds.
D. Data Collection and Stabilization
D.1 Damping Devices. Use of damping devices, as described in section 40.6.3.2.2 of HI 40.6-2014-B (incorporated by reference, see §431.463), are only permitted to integrate up to the data collection interval used during testing.
D.2 Stabilization. Record data at any tested load point only under stabilized conditions, as defined in HI 40.6-2014-B section 40.6.5.5.1 (incorporated by reference, see §431.463), where a minimum of two measurements are used to determine stabilization.
D.3 Test Points. Measure the flow rate in gpm, pump total head in ft, the driver power input in W, and the speed of rotation in rpm at each load point specified in Table 1 of this appendix for each DPPP variety and speed configuration:
Table 1—Load Points (i) and Weights (wi) for Each DPPP Variety and Speed Configuration
DPPP varieties
Speed configuration(s)
(Q) (GPM)
(H) (ft)
Self-Priming Pool Filter Pumps And Non-Self-Priming Pool Filter Pumps Single-speed dedicated-purpose pool pumps and all self-priming and non-self-priming pool filter pumps not meeting the definition of two-*, multi-, or variable-speed dedicated-purpose pool pump 1 High Qhigh (gpm) = Qmax_speed@C** H = 0.0082 × Qhigh2 Maximum speed
Two-speed dedicated-purpose pool pumps* 2 Low Qlow (gpm) = Flow rate associated with specified head and speed that is not below:
• 31.1 gpm if rated hydraulic horsepower is >0.75 or
• 24.7 gpm if rated hydraulic horsepower is ≤0.75 H = 0.0082 × Qlow2 Lowest speed capable of meeting the specified flow and head values, if any***.
High Qhigh (gpm) = Qmax_speed@C** H = 0.0082 × Qhigh2 Maximum speed.
Multi-speed and variable-speed dedicated-purpose pool pumps 2 Low Qlow (gpm) =
• If rated hydraulic horsepower is >0.75, then Qlow ≥ 31.1 gpm
• If rated hydraulic horsepower is ≤0.75, then Qlow ≥24.7 gpm H = 0.0082 × Qlow2 Lowest speed capable of meeting the specified flow and head values.
High Qhigh (gpm) ≥0.8 × Qmax_speed@C** H = 0.0082 × Qhigh2 Lowest speed capable of meeting the specified flow and head values.
Waterfall Pumps Single-speed dedicated-purpose pool pumps 1 High Qlow (gpm) = Flow corresponding to specified head 17.0 ft Maximum speed.
Pressure Cleaner Booster Pumps Any 1 High 10.0 gpm ≥60.0 ft Lowest speed capable of meeting the specified flow and head values.
*In order to apply the test points for two-speed self-priming and non-self-priming pool filter pumps, self-priming pool filter pumps that are greater than or equal to 0.711 rated hydraulic horsepower that are two-speed dedicated-purpose pool pumps must also be distributed in commerce either: (1) With a pool pump control (variable speed drive and user interface or switch) that changes the speed in response to pre-programmed user preferences and allows the user to select the duration of each speed and/or the on/off times or (2) without a pool pump control that has such capability, but without which the pump is unable to operate. Two-speed self-priming pool filter pumps greater than or equal to 0.711 rated hydraulic horsepower that do not meet these requirements must be tested using the load point for single-speed self-priming or non-self-priming pool filter pumps, as appropriate.
**Qmax_speed@C = Flow at max speed on curve C (gpm)
***If a two-speed pump has a low speed that results in a flow rate below the specified values, the low speed of that pump shall not be tested.
E.1 Determination of Weighted Energy Factor. Determine the WEF as a ratio of the measured flow and driver power input to the dedicated-purpose pool pump in accordance with the following equation:
WEF = Weighted Energy Factor in kgal/kWh;
wi = weighting factor at each load point i, as specified in section E.2 of this appendix;
Qi = flow at each load point i, in gpm;
Pi = driver power input to the motor (or controls, if present) at each load point i, in watts;
i = load point(s), defined uniquely for each DPPP variety and speed configuration as specified in section D.3 of this appendix; and
n = number of load point(s), defined uniquely for each DPPP variety and speed configuration as specified in section D.3 of this appendix.
E.2 Weights. When determining WEF, apply the weights specified in Table 2 of this appendix for the applicable load points, DPPP varieties, and speed configurations:
Table 2—Load Point Weights (wi)
Load point(s) i
Self-Priming Pool Filter Pumps and Non-Self-Priming Pool Filter Pumps Single-speed dedicated-purpose pool pumps and all self-priming and non-self-priming pool filter pumps not meeting the definition of two-,* multi-, or variable-speed dedicated-purpose pool pump 1.0
Two-speed dedicated-purpose pool pumps* 0.80 0.20
Multi-speed and variable-speed dedicated-purpose pool pumps 0.80 0.20
Waterfall Pumps Single-speed dedicated-purpose pool pumps 1.0
Pressure Cleaner Booster Pump Any 1.0
E.3 Determination of Horsepower and True Power Factor Metrics
E.3.1 Determine the pump power output at any load point i using the following equation:
Pu,i = the measured pump power output at load point i of the tested pump, in hp;
Qi = the measured flow rate at load point i of the tested pump, in gpm;
Hi = pump total head at load point i of the tested pump, in ft; and
SG = the specific gravity of water at specified test conditions, which is equivalent to 1.00.
E.3.1.1 Determine the rated hydraulic horsepower as the pump power output measured on the reference curve at maximum rotating speed and full impeller diameter for the rated pump.
E.3.2 For dedicated-purpose pool pumps with single-phase AC motors or DC motors, determine the dedicated-purpose pool pump nominal motor horsepower as the product of the measured full load speed and torque, adjusted to the appropriate units, as shown in the following equation:
Pnm = the dedicated-purpose pool pump nominal total horsepower at full load, in hp;
T = output torque at full load, in lb-ft; and
n = the motor speed at full load, in rpm.
Full-load speed and torque shall be determined based on the maximum continuous duty motor power output rating allowable for the motor's nameplate ambient rating and insulation class.
E.3.2.1 For single-phase AC motors, determine the measured speed and torque at full load according to either section E.3.2.1.1 or E.3.2.1.2 of this appendix.
E.3.2.1.1 Use the procedures in section 3.2, “Tests with load”; section 4 “Testing facilities”; section 5.2 “Mechanical measurements”; section 5.3 “Temperature measurements”; and section 6 “Tests” of IEEE 114-2010 (incorporated by reference, see §431.463), or
E.3.2.1.2 Use the applicable procedures in section 5, “General test requirements” and section 6, “Tests” of CSA C747-2009 (RA 2014); except in section 6.4(b) the conversion factor shall be 5252, only measurements at full load are required in section 6.5, and section 6.6 shall be disregarded (incorporated by reference, see §431.463).
E.3.2.2 For DC motors, determine the measured speed and torque at full load according to either section E.3.2.2.1 or E.3.2.2.2 of this appendix.
E.3.2.2.1 Use the procedures in section 3.1, “Instrument Selection Factors”; section 3.4 “Power Measurement”: Section 3.5 “Power Sources”; section 4.1.2 “Ambient Air”; section 4.1.4 “Direction of Rotation”; section 5.4.1 “Reference Conditions”; and section 5.4.3.2 “Dynomometer or Torquemeter Method” of IEEE 113-1985 (incorporated by reference, see §431.463), or
E.3.2.2.2 Use the applicable procedures in section 5, “General test requirements” and section 6, “Tests” of CSA C747-2009 (RA 2014); except in section 6.4(b) the conversion factor shall be 5252, only measurements at full load are required in section 6.5, and section 6.6 shall be disregarded (incorporated by reference, see §431.463).
E.3.3 For dedicated-purpose pool pumps with single-phase AC motors or DC motors, the dedicated-purpose pool pump service factor is equal to 1.0.
E.3.4 Determine the dedicated-purpose pool pump motor total horsepower according to section E.3.4.1 of this appendix for dedicated-purpose pool pumps with single-phase AC motors or DC motors and section E.3.4.2 of this appendix for dedicated-purpose pool pumps with polyphase AC motors.
E.3.4.1 For dedicated-purpose pool pumps with single-phase AC motors or DC motors, determine the dedicated-purpose pool pump motor total horsepower as the product of the dedicated-purpose pool pump nominal motor horsepower, determined in accordance with section E.3.2 of this appendix, and the dedicated-purpose pool pump service factor, determined in accordance with section E.3.3 of this appendix.
E.3.4.2 For dedicated-purpose pool pumps with polyphase AC induction motors, determine the dedicated-purpose pool pump motor total horsepower as the product of the rated nominal motor horsepower and the rated service factor of the motor.
E.3.5 Determine the true power factor at each applicable load point specified in Table 1 of this appendix for each DPPP variety and speed configuration as a ratio of driver power input to the motor (or controls, if present) (Pi), in watts, divided by the product of the voltage in volts and the current in amps at each load point i, as shown in the following equation:
PFi = true power factor at each load point i, dimensionless;
Vi = voltage at each load point i, in volts;
Ii = current at each load point i, in amps; and
i = load point(s), defined uniquely for each DPPP variety and speed configuration as specified in section D.3 of this appendix.
E.4 Determination of Maximum Head. Determine the maximum head for self-priming pool filter pumps, non-self-priming pool filter pumps, and waterfall pumps by measuring the head at maximum speed and the minimum flow rate at which the pump is designed to operate continuously or safely, where the minimum flow rate is assumed to be zero unless stated otherwise in the manufacturer literature.
F. Determination of Self-Priming Capability
F.1 Test Method. Determine the vertical lift and true priming time of non-self-priming pool filter pumps and self-priming pool filter pumps that are not already certified as self-priming under NSF/ANSI 50-2015 (incorporated by reference, see §431.463) by testing such pumps pursuant to section C.3 of appendix C of NSF/ANSI 50-2015, except for the modifications and exceptions listed in the following sections F.1.1 through F.1.5 of this appendix:
F.1.1 Where section C.3.2, “Apparatus,” and section C.3.4, “Self-priming capability test method,” of NSF/ANSI 50-2015 (incorporated by reference, see §431.463) state that the “suction line must be essentially as shown in annex C, figure C.1;” the phrase “essentially as shown in Annex C, figure C.1” means:
• The centerline of the pump impeller shaft is situated a vertical distance equivalent to the specified vertical lift (VL), calculated in accordance with section F.1.1.1. of this appendix, above the water level of a water tank of sufficient volume as to maintain a constant water surface level for the duration of the test;
• The pump draws water from the water tank with a riser pipe that extends below the water level a distance of at least 3 times the riser pipe diameter (i.e., 3 pipe diameters);
• The suction inlet of the pump is at least 5 pipe diameters from any obstructions, 90° bends, valves, or fittings; and
• The riser pipe is of the same pipe diameter as the pump suction inlet.
F.1.1.1 The vertical lift (VL) must be normalized to 5.0 feet at an atmospheric pressure of 14.7 psia and a water density of 62.4 lb/ft3 in accordance with the following equation:
VL = vertical lift of the test apparatus from the waterline to the centerline of the pump impeller shaft, in ft;
ρtest = density of test fluid, in lb/ft3; and
Pabs,test = absolute barometric pressure of test apparatus location at centerline of pump impeller shaft, in psia.
F.1.2 The equipment accuracy requirements specified in section B, “Measurement Equipment,” of this appendix also apply to this section F, as applicable.
F.1.2.1 All measurements of head (gauge pressure), flow, and water temperature must be taken at the pump suction inlet and all head measurements must be normalized back to the centerline of the pump impeller shaft in accordance with section A.3.1.3.1 of HI 40.6-2014-B (incorporated by reference, see §431.463).
F.1.3 All tests must be conducted with clear water that meets the requirements adopted in section C.3 of this appendix.
F.1.4 In section C.3.4, “Self-priming capability test method,” of NSF/ANSI 50-2015 (incorporated by reference, see §431.463), “the elapsed time to steady discharge gauge reading or full discharge flow” is determined when the changes in head and flow, respectively, are within the tolerance values specified in table 40.6.3.2.2, “Permissible amplitude of fluctuation as a percentage of mean value of quantity being measured at any test point,” of HI 40.6-2014-B (incorporated by reference, see §431.463). The measured priming time (MPT) is determined as the point in time when the stabilized load point is first achieved, not when stabilization is determined. In addition, the true priming time (TPT) is equivalent to the MPT.
F.1.5 The maximum true priming time for each test run must not exceed 10.0 minutes. Disregard section C.3.5 of NSF/ANSI 50-2015 (incorporated by reference, see §431.463).
G. Optional Testing and Calculations
G.1 Energy Factor. When making representations regarding the EF of dedicated-purpose pool pumps, determine EF on one of four system curves (A, B, C, or D) and at any given speed (s) according to the following equation:
EFX,s = the energy factor on system curve X at speed s in gal/Wh;
X = one of four possible system curves (A, B, C, or D), as defined in section G.1.1 of this appendix;
s = the tested speed, in rpm;
QX,s = flow rate measured on system curve X at speed s in gpm; and
PX,s = driver power input to the motor (or controls, if present) on system curve X at speed s in watts.
G.1.1 System Curves. The energy factor may be determined at any speed (s) and on any of the four system curves A, B, C, and/or D specified in the Table 3:
Table 3—Systems Curves for Optional EF Test Procedure
System curve equation*
A H = 0.0167 × Q2
B H = 0.0500 × Q2
C H = 0.0082 × Q2
D H = 0.0044 × Q2
*In the above table, Q refers to the flow rate in gpm and H refers to head in ft.
G.2 Replacement Dedicated-Purpose Pool Pump Motors. To determine the WEF for replacement DPPP motors, test each replacement DPPP motor paired with each dedicated-purpose pool pump bare pump for which the replacement DPPP motor is advertised to be paired, as stated in the manufacturer's literature for that replacement DPPP motor model, according to the testing and calculations described in sections A, B, C, D, and E of this appendix. Alternatively, each replacement DPPP motor may be tested with the most consumptive dedicated-purpose pool pump bare pump for which it is advertised to be paired, as stated in the manufacturer's literature for that replacement DPPP motor model. If a replacement DPPP motor is not advertised to be paired with any specific dedicated-purpose pool pump bare pumps, test with the most consumptive dedicated-purpose pool pump bare pump available.
[82 FR 36924, Aug. 7, 2017]
Note: Any representations made on or after July 19, 2021, with respect to the energy use or efficiency of dedicated-purpose pool pumps subject to testing pursuant to 10 CFR 431.464(b) must be made in accordance with the results of testing pursuant to this appendix.
A.1 Test Method. To determine the weighted energy factor (WEF) for dedicated-purpose pool pumps, perform “wire-to-water” testing in accordance with HI 40.6-2014-B, except section 40.6.4.1, “Vertically suspended pumps”; section 40.6.4.2, “Submersible pumps”; section 40.6.5.3, “Test report”; section 40.6.5.5, “Test conditions”; section 40.6.5.5.2, “Speed of rotation during testing”; section 40.6.6.1, “Translation of test results to rated speed of rotation”; section 40.6.6.2, “Pump efficiency”; section 40.6.6.3, “Performance curve”; section A.7, “Testing at temperatures exceeding 30 °C (86 °F)”; and appendix B, “Reporting of test results”; (incorporated by reference, see §431.463) with the modifications and additions as noted throughout the provisions below. Do not use the test points specified in section 40.6.5.5.1, “Test procedure” of HI 40.6-2014-B and instead use those test points specified in section D.3 of this appendix for the applicable dedicated-purpose pool pump variety and speed configuration. When determining overall efficiency, best efficiency point, or other applicable pump energy performance information, section 40.6.5.5.1, “Test procedure”; section 40.6.6.2, “Pump efficiency”; and section 40.6.6.3, “Performance curve” must be used, as applicable. For the purposes of applying this appendix, the term “volume per unit time,” as defined in section 40.6.2, “Terms and definitions,” of HI 40.6-2014-B shall be deemed to be synonymous with the term “flow rate” used throughout that standard and this appendix .
A.2 Calculations and Rounding. All terms and quantities refer to values determined in accordance with the procedures set forth in this appendix for the rated pump. Perform all calculations using raw measured values without rounding. Round WEF, maximum head, vertical lift, and true priming time values to the tenths place (i.e., 0.1) and rated hydraulic horsepower to the thousandths place (i.e., 0.001). Round all other reported values to the hundredths place unless otherwise specified.
B.1 For the purposes of measuring flow rate, speed of rotation, temperature, and pump power output, the equipment specified in HI 40.6-2014-B Appendix C (incorporated by reference, see §431.463) necessary to measure head, speed of rotation, flow rate, and temperature must be used and must comply with the stated accuracy requirements in HI 40.6-2014-B Table 40.6.3.2.3, except as specified in sections B.1.1 and B.1.2 of this appendix. When more than one instrument is used to measure a given parameter, the combined accuracy, calculated as the root sum of squares of individual instrument accuracies, must meet the specified accuracy requirements.
Self-Priming Pool Filter Pumps And Non-Self-Priming Pool Filter Pumps Single-speed dedicated-purpose pool pumps and all self-priming and non-self-priming pool filter pumps not meeting the definition of two-*, multi-, or variable-speed dedicated-purpose pool pump 1 High Qhigh (gpm) = Qmax_speed@C** H = 0.0082 × Qhigh2 Maximum speed.
• 24.7 gpm if rated hydraulic horsepower is ≤0.75 H = 0.0082 × Qlow2 Lowest speed capable of meeting the specified flow and head values, if any.***
High Qhigh (gpm) = Qmax_speed@C** H = 0.0082 × Qlow2 Maximum speed.
• If rated hydraulic horsepower is >0.75, then Qlow ≥31.1 gpm
**Qmax_speed@C = Flow at max speed on curve C (gpm).
Load point(s)
Self-Priming Pool Filter Pumps and Non-Self-Priming Pool Filter Pumps Single-speed dedicated-purpose pool pumps and all self-priming and non-self-priming pool filter pumps not meeting the definition of two-*, multi-, or variable-speed dedicated-purpose pool pump 1.0
(1) The centerline of the pump impeller shaft is situated a vertical distance equivalent to the specified vertical lift (VL), calculated in accordance with section F.1.1.1. of this appendix, above the water level of a water tank of sufficient volume as to maintain a constant water surface level for the duration of the test;
(2) The pump draws water from the water tank with a riser pipe that extends below the water level a distance of at least 3 times the riser pipe diameter (i.e., 3 pipe diameters);
(3) The suction inlet of the pump is at least 5 pipe diameters from any obstructions, 90° bends, valves, or fittings; and
(4) The riser pipe is of the same pipe diameter as the pump suction inlet.
G.1 Replacement Dedicated-Purpose Pool Pump Motors. To determine the WEF for replacement DPPP motors, test each replacement DPPP motor paired with each dedicated-purpose pool pump bare pump for which the replacement DPPP motor is advertised to be paired, as stated in the manufacturer's literature for that replacement DPPP motor model, according to the testing and calculations described in sections A, B, C, D, and E of this appendix. Alternatively, each replacement DPPP motor may be tested with the most consumptive dedicated-purpose pool pump bare pump for which it is advertised to be paired, as stated in the manufacturer's literature for that replacement DPPP motor model. If a replacement DPPP motor is not advertised to be paired with any specific dedicated-purpose pool pump bare pumps, test with the most consumptive dedicated-purpose pool pump bare pump available.