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Electronic Code of Federal Regulations

e-CFR data is current as of December 9, 2019

Title 10Chapter IISubchapter DPart 431 → Subpart Y


Title 10: Energy
PART 431—ENERGY EFFICIENCY PROGRAM FOR CERTAIN COMMERCIAL AND INDUSTRIAL EQUIPMENT


Subpart Y—Pumps


Contents
§431.461   Purpose and scope.
§431.462   Definitions.
§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.
§431.466   Pumps labeling requirements.
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.

§431.461   Purpose and scope.

This subpart contains definitions, test procedures, and energy conservation requirements for pumps, pursuant to Part A-1 of Title III of the Energy Policy and Conservation Act, as amended, 42 U.S.C. 6311-6317.

§431.462   Definitions.

The following definitions are applicable to this subpart, including appendices A and B. In cases where there is a conflict, the language of the definitions adopted in this section takes precedence over any descriptions or definitions found in the 2014 version of ANSI/HI Standard 1.1-1.2, “Rotodynamic (Centrifugal) Pumps For Nomenclature And Definitions” (ANSI/HI 1.1-1.2-2014; incorporated by reference, see §431.463), or the 2014 version of ANSI/HI Standard 2.1-2.2, “Rotodynamic (Vertical) Pumps For Nomenclature And Definitions” (ANSI/HI 2.1-2.2-2014; incorporated by reference, see §431.463). In cases where definitions reference design intent, DOE will consider marketing materials, labels and certifications, and equipment design to determine design intent.

Bare pump means a pump excluding mechanical equipment, driver, and controls.

Basic model means all units of a given class of pump manufactured by one manufacturer, having the same primary energy source, and having essentially identical electrical, physical, and functional (or hydraulic) characteristics that affect energy consumption, energy efficiency, water consumption, or water efficiency; and, in addition, for pumps that are subject to the standards specified in §431.465(b), the following provisions also apply:

(1) All variations in numbers of stages of bare RSV and ST pumps must be considered a single basic model;

(2) Pump models for which the bare pump differs in impeller diameter, or impeller trim, may be considered a single basic model; and

(3) Pump models for which the bare pump differs in number of stages or impeller diameter and which are sold with motors (or motors and controls) of varying horsepower may only be considered a single basic model if:

(i) For ESCC, ESFM, IL, and RSV pumps, each motor offered in the basic model has a nominal full load motor efficiency rated at the Federal minimum (see the current table for NEMA Design B motors at §431.25) or the same number of bands above the Federal minimum for each respective motor horsepower (see Table 3 of appendix A to subpart Y of this part); or

(ii) For ST pumps, each motor offered in the basic model has a full load motor efficiency at the default nominal full load submersible motor efficiency shown in Table 2 of appendix A to subpart Y of this part or the same number of bands above the default nominal full load submersible motor efficiency for each respective motor horsepower (see Table 3 of appendix A to subpart Y of this part).

Basket strainer means a perforated or otherwise porous receptacle, mounted within a housing on the suction side of a pump, that prevents solid debris from entering a pump. The basket strainer receptacle is capable of passing spherical solids of 1 mm in diameter, and can be removed by hand or using only simple tools (e.g., screwdriver, pliers, open-ended wrench).

Best efficiency point (BEP) means the pump hydraulic power operating point (consisting of both flow and head conditions) that results in the maximum efficiency.

Bowl diameter means the maximum dimension of an imaginary straight line passing through and in the plane of the circular shape of the intermediate bowl of the bare pump that is perpendicular to the pump shaft and that intersects the outermost circular shape of the intermediate bowl of the bare pump at both of its ends, where the intermediate bowl is as defined in ANSI/HI 2.1-2.2-2014.

Clean water pump means a pump that is designed for use in pumping water with a maximum non-absorbent free solid content of 0.016 pounds per cubic foot, and with a maximum dissolved solid content of 3.1 pounds per cubic foot, provided that the total gas content of the water does not exceed the saturation volume, and disregarding any additives necessary to prevent the water from freezing at a minimum of 14 °F.

Close-coupled pump means a pump in which the motor shaft also serves as the impeller shaft for the bare pump.

Continuous control means a control that adjusts the speed of the pump driver continuously over the driver operating speed range in response to incremental changes in the required pump flow, head, or power output.

Control means any device that can be used to operate the driver. Examples include, but are not limited to, continuous or non-continuous controls, schedule-based controls, on/off switches, and float switches.

Dedicated-purpose pool pump comprises self-priming pool filter pumps, non-self-priming pool filter pumps, waterfall pumps, pressure cleaner booster pumps, integral sand-filter pool pumps, integral-cartridge filter pool pumps, storable electric spa pumps, and rigid electric spa pumps.

Dedicated-purpose pool pump motor total horsepower means the product of the dedicated-purpose pool pump nominal motor horsepower and the dedicated-purpose pool pump service factor of a motor used on a dedicated-purpose pool pump based on the maximum continuous duty motor power output rating allowable for the motor's nameplate ambient rating and insulation class. (Dedicated-purpose pool pump motor total horsepower is also referred to in the industry as service factor horsepower or motor capacity.)

Dedicated-purpose pool pump service factor means a multiplier applied to the rated horsepower of a pump motor to indicate the percent above nameplate horsepower at which the motor can operate continuously without exceeding its allowable insulation class temperature limit.

Designed and marketed means that the equipment is designed to fulfill the indicated application and, when distributed in commerce, is designated and marketed for that application, with the designation on the packaging and any publicly available documents (e.g., product literature, catalogs, and packaging labels).

Driver means the machine providing mechanical input to drive a bare pump directly or through the use of mechanical equipment. Examples include, but are not limited to, an electric motor, internal combustion engine, or gas/steam turbine.

Dry rotor pump means a pump in which the motor rotor is not immersed in the pumped fluid.

End suction close-coupled (ESCC) pump means a close-coupled, dry rotor, end suction pump that has a shaft input power greater than or equal to 1 hp and less than or equal to 200 hp at BEP and full impeller diameter and that is not a dedicated-purpose pool pump. Examples include, but are not limited to, pumps within the specified horsepower range that comply with ANSI/HI nomenclature OH7, as described in ANSI/HI 1.1-1.2-2014.

End suction frame mounted/own bearings (ESFM) pump means a mechanically-coupled, dry rotor, end suction pump that has a shaft input power greater than or equal to 1 hp and less than or equal to 200 hp at BEP and full impeller diameter and that is not a dedicated-purpose pool pump. Examples include, but are not limited to, pumps within the specified horsepower range that comply with ANSI/HI nomenclature OH0 and OH1, as described in ANSI/HI 1.1-1.2-2014.

End suction pump means a single-stage, rotodynamic pump in which the liquid enters the bare pump in a direction parallel to the impeller shaft and on the side opposite the bare pump's driver-end. The liquid is discharged through a volute in a plane perpendicular to the shaft.

Fire pump means a pump that is compliant with NFPA 20-2016 (incorporated by reference, see §431.463), “Standard for the Installation of Stationary Pumps for Fire Protection,” and is either:

(1) UL listed under ANSI/UL 448-2013 (incorporated by reference, see §431.463), “Standard for Safety Centrifugal Stationary Pumps for Fire-Protection Service,” or

(2) FM Global (FM) approved under the January 2015 edition of FM Class Number 1319, “Approval Standard for Centrifugal Fire Pumps (Horizontal, End Suction Type),” (incorporated by reference, see §431.463).

Freeze protection control means a pool pump control that, at a certain ambient temperature, turns on the dedicated-purpose pool pump to circulate water for a period of time to prevent the pool and water in plumbing from freezing.

Full impeller diameter means the maximum diameter impeller with which a given pump basic model is distributed in commerce.

Horizontal motor means a motor that requires the motor shaft to be in a horizontal position to function as designed, as specified in the manufacturer literature.

In-line (IL) pump means a pump that is either a twin-head pump or a single-stage, single-axis flow, dry rotor, rotodynamic pump that has a shaft input power greater than or equal to 1 hp and less than or equal to 200 hp at BEP and full impeller diameter, in which liquid is discharged through a volute in a plane perpendicular to the shaft. Such pumps do not include pumps that are mechanically coupled or close-coupled, have a pump power output that is less than or equal to 5 hp at BEP at full impeller diameter, and are distributed in commerce with a horizontal motor. Examples of in-line pumps include, but are not limited to, pumps within the specified horsepower range that comply with ANSI/HI nomenclature OH3, OH4, or OH5, as described in ANSI/HI 1.1-1.2-2014.

Integral means a part of the device that cannot be removed without compromising the device's function or destroying the physical integrity of the unit.

Integral cartridge-filter pool pump means a pump that requires a removable cartridge filter, installed on the suction side of the pump, for operation; and the cartridge filter cannot be bypassed.

Integral sand-filter pool pump means a pump distributed in commerce with a sand filter that cannot be bypassed.

Magnet driven pump means a pump in which the bare pump is isolated from the motor via a containment shell and torque is transmitted from the motor to the bare pump via magnetic force. The motor shaft is not physically coupled to the impeller or impeller shaft.

Mechanical equipment means any component of a pump that transfers energy from the driver to the bare pump.

Mechanically-coupled pump means a pump in which the bare pump has its own impeller shaft and bearings and so does not rely on the motor shaft to serve as the impeller shaft.

Multi-speed dedicated-purpose pool pump means a dedicated-purpose pool pump that is capable of operating at more than two discrete, pre-determined operating speeds separated by speed increments greater than 100 rpm, where the lowest speed is less than or equal to half of the maximum operating speed and greater than zero, and must be distributed in commerce with an on-board pool pump control (i.e., variable speed drive and user interface or programmable 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.

Non-continuous control means a control that adjusts the speed of a driver to one of a discrete number of non-continuous preset operating speeds, and does not respond to incremental reductions in the required pump flow, head, or power output.

Non-self-priming pool filter pump means a pool filter pump that is not certified under NSF/ANSI 50-2015 (incorporated by reference, see §431.463) to be self-priming and is not capable of re-priming to a vertical lift of at least 5.0 feet with a true priming time less than or equal to 10.0 minutes, when tested in accordance with section F of appendix B or C of this subpart, and is not a waterfall pump.

Pool filter pump means an end suction pump that:

(1) Either:

(i) Includes an integrated basket strainer; or

(ii) Does not include an integrated basket strainer, but requires a basket strainer for operation, as stated in manufacturer literature provided with the pump; and

(2) May be distributed in commerce connected to, or packaged with, a sand filter, removable cartridge filter, or other filtration accessory, so long as the filtration accessory are connected with consumer-removable connections that allow the filtration accessory to be bypassed.

Pool pump timer means a pool pump control that automatically turns off a dedicated-purpose pool pump after a run-time of no longer than 10 hours.

Pressure cleaner booster pump means an end suction, dry rotor pump designed and marketed for pressure-side pool cleaner applications, and which may be UL listed under ANSI/UL 1081-2016 (incorporated by reference, see §431.463).

Prime-assist pump means a pump that:

(1) Is designed to lift liquid that originates below the centerline of the pump inlet;

(2) Requires no manual intervention to prime or re-prime from a dry-start condition; and

(3) Includes a device, such as a vacuum pump or air compressor and venturi eductor, to remove air from the suction line in order to automatically perform the prime or re-prime function at any point during the pump's operating cycle.

Pump means equipment designed to move liquids (which may include entrained gases, free solids, and totally dissolved solids) by physical or mechanical action and includes a bare pump and, if included by the manufacturer at the time of sale, mechanical equipment, driver, and controls.

Radially split, multi-stage, vertical, in-line diffuser casing (RSV) pump means a vertically suspended, multi-stage, single axis flow, dry rotor, rotodynamic pump:

(1) That has a shaft input power greater than or equal to 1 hp and less than or equal to 200 hp at BEP and full impeller diameter and at the number of stages required for testing and

(2) In which liquid is discharged in a place perpendicular to the impeller shaft; and

(3) For which each stage (or bowl) consists of an impeller and diffuser;

(4) For which no external part of such a pump is designed to be submerged in the pumped liquid; and

(5) Examples include, but are not limited to, pumps complying with ANSI/HI nomenclature VS8, as described in ANSI/HI 2.1-2.2-2014.

Removable cartridge filter means a filter component with fixed dimensions that captures and removes suspended particles from water flowing through the unit. The removable cartridge filter is not capable of passing spherical solids of 1 mm in diameter or greater, and can be removed from the filter housing by hand or using only simple tools (e.g., screwdrivers, pliers, open-ended wrench).

Rigid electric spa pump means an end suction pump that does not contain an integrated basket strainer or require a basket strainer for operation as stated in manufacturer literature provided with the pump and that meets the following three criteria:

(1) Is assembled with four through bolts that hold the motor rear endplate, rear bearing, rotor, front bearing, front endplate, and the bare pump together as an integral unit;

(2) Is constructed with buttress threads at the inlet and discharge of the bare pump; and

(3) Uses a casing or volute and connections constructed of a non-metallic material.

Rotodynamic pump means a pump in which energy is continuously imparted to the pumped fluid by means of a rotating impeller, propeller, or rotor.

Sand filter means a device designed to filter water through sand or an alternate sand-type media.

Self-priming pool filter pump means a pool filter pump that is certified under NSF/ANSI 50-2015 (incorporated by reference, see §431.463) to be self-priming or is capable of re-priming to a vertical lift of at least 5.0 feet with a true priming time less than or equal to 10.0 minutes, when tested in accordance with section F of appendix B or C of this subpart, and is not a waterfall pump.

Self-priming pump means a pump that either is a self-priming pool filter pump or a pump that:

(1) Is designed to lift liquid that originates below the centerline of the pump inlet;

(2) Contains at least one internal recirculation passage; and

(3) Requires a manual filling of the pump casing prior to initial start-up, but is able to re-prime after the initial start-up without the use of external vacuum sources, manual filling, or a foot valve.

Single axis flow pump means a pump in which the liquid inlet of the bare pump is on the same axis as the liquid discharge of the bare pump.

Single-speed dedicated-purpose pool pump means a dedicated-purpose pool pump that is capable of operating at only one speed.

Storable electric spa pump means a pump that is distributed in commerce with one or more of the following:

(1) An integral heater; and

(2) An integral air pump.

Submersible pump means a pump that is designed to be operated with the motor and bare pump fully submerged in the pumped liquid.

Submersible turbine (ST) pump means a single-stage or multi-stage, dry rotor, rotodynamic pump that is designed to be operated with the motor and stage(s) fully submerged in the pumped liquid; that has a shaft input power greater than or equal to 1 hp and less than or equal to 200 hp at BEP and full impeller diameter and at the number of stages required for testing; and in which each stage of this pump consists of an impeller and diffuser, and liquid enters and exits each stage of the bare pump in a direction parallel to the impeller shaft. Examples include, but are not limited to, pumps within the specified horsepower range that comply with ANSI/HI nomenclature VS0, as described in ANSI/HI 2.1-2.2-2014.

Twin head pump means a dry rotor, single-axis flow, rotodynamic pump that contains two impeller assemblies, which both share a common casing, inlet, and discharge, and each of which

(1) Contains an impeller, impeller shaft (or motor shaft in the case of close-coupled pumps), shaft seal or packing, driver (if present), and mechanical equipment (if present);

(2) Has a shaft input power that is greater than or equal to 1 hp and less than or equal to 200 hp at best efficiency point (BEP) and full impeller diameter;

(3) Has the same primary energy source (if sold with a driver) and the same electrical, physical, and functional characteristics that affect energy consumption or energy efficiency;

(4) Is mounted in its own volute; and

(5) Discharges liquid through its volute and the common discharge in a plane perpendicular to the impeller shaft.

Two-speed dedicated-purpose pool pump means a dedicated-purpose pool pump that is capable of operating at only two different pre-determined operating speeds, where the low operating speed is less than or equal to half of the maximum operating speed and greater than zero, and must be distributed in commerce either:

(1) With a pool pump control (e.g., variable speed drive and user interface or switch) that is capable of changing the speed in response to user preferences; or

(2) Without a pool pump control that has the capability to change speed in response to user preferences, but is unable to operate without the presence of such a pool pump control.

Variable-speed dedicated-purpose pool pump means a dedicated-purpose pool pump that is capable of operating at a variety of user-determined speeds, where all the speeds are separated by at most 100 rpm increments over the operating range and the lowest operating speed is less than or equal to one-third of the maximum operating speed and greater than zero. Such a pump must include a variable speed drive and be distributed in commerce either:

(1) With a user interface 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 user interface 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, but is unable to operate without the presence of a user interface.

Variable speed drive means equipment capable of varying the speed of the motor.

Waterfall pump means a pool filter pump with a certified maximum head less than or equal to 30.0 feet, and a maximum speed less than or equal to 1,800 rpm.

[81 FR 4145, Jan. 25, 2016, as amended at 82 FR 5742, Jan. 18, 2017; 82 FR 36920, Aug. 7, 2017]

§431.463   Materials incorporated by reference.

(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.”

(2) [Reserved]

(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.

(2) [Reserved]

(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.

(2) [Reserved]

(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.

(2) [Reserved]

(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]

§431.464   Test procedure for the measurement of energy efficiency, energy consumption, and other performance factors of pumps.

(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.

[82 FR 36923, Aug. 7, 2017]

§431.465   Pumps energy conservation standards and their compliance dates.

(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 class1Maximum PEI2C-value3
ESCC.1800.CL1.00128.47
ESCC.3600.CL1.00130.42
ESCC.1800.VL1.00128.47
ESCC.3600.VL1.00130.42
ESFM.1800.CL1.00128.85
ESFM.3600.CL1.00130.99
ESFM.1800.VL1.00128.85
ESFM.3600.VL1.00130.99
IL.1800.CL1.00129.30
IL.3600.CL1.00133.84
IL.1800.VL1.00129.30
IL.3600.VL1.00133.84
RSV.1800.CL1.00129.63
RSV.3600.CL1.00133.20
RSV.1800.VL1.00129.63
RSV.3600.VL1.00133.20
ST.1800.CL1.00138.78
ST.3600.CL1.00134.85
ST.1800.VL1.00138.78
ST.3600.VL1.00134.85

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:

Equipment classMinimum
allowable WEF score
[kgal/kWh]
Minimum allowable WEF score
[kgal/kWh]
Dedicated-purpose pool pump
variety
hhp ApplicabilityMotor phase   
Self-priming pool filter pumps0.711 hp ≤hhp <2.5 hpSingleWEF = −2.30 * ln (hhp) + 6.59.
Self-priming pool filter pumpshhp <0.711 hpSingleWEF = 5.55, for hhp ≤0.13 hp −1.30 * ln (hhp) + 2.90, for hhp >0.13 hp.
Non-self-priming pool filter pumpshhp <2.5 hpAnyWEF = 4.60, for hhp ≤0.13 hp −0.85 * ln (hhp) + 2.87, for hhp >0.13 hp.
Pressure cleaner booster pumpsAnyAnyWEF = 0.42.

(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 12 of the maximum available speed.

[81 FR 4431, Jan. 26, 2016, as amended at 82 FR 5742, Jan. 18, 2017]

§431.466   Pumps labeling requirements.

(a) General pumps. For the pumps described in §431.464(a), the following requirements apply to units manufactured on the same date that compliance is required with any applicable standards prescribed in §431.465.

(1) Pump nameplate—(i) Required information. The permanent nameplate must be marked clearly with the following information:

(A) For bare pumps and pumps sold with electric motors but not continuous or non-continuous controls, the rated pump energy index—constant load (PEICL), and for pumps sold with motors and continuous or non-continuous controls, the rated pump energy index—variable load (PEIVL);

(B) The bare pump model number; and

(C) If transferred directly to an end-user, the unit's impeller diameter, as distributed in commerce. Otherwise, a space must be provided for the impeller diameter to be filled in.

(ii) Display of required information. All orientation, spacing, type sizes, typefaces, and line widths to display this required information must be the same as or similar to the display of the other performance data on the pump's permanent nameplate. The PEICL or PEIVL, as appropriate to a given pump model, must be identified in the form “PEICL ____” or “PEIVL ____.” The model number must be in one of the following forms: “Model ____” or “Model number ____” or “Model No. ____.” The unit's impeller diameter must be in the form “Imp. Dia. ____(in.).”

(2) Disclosure of efficiency information in marketing materials. (i) The same information that must appear on a pump's permanent nameplate pursuant to paragraph (a)(1)(i) of this section, must also be prominently displayed:

(A) On each page of a catalog that lists the pump; and

(B) In other materials used to market the pump.

(ii) [Reserved]

(b) Dedicated-purpose pool pumps. For the pumps described in §431.464(b), the following requirements apply on the same date that compliance is required with any applicable standards prescribed in §431.465.

(1) Pump nameplate—(i) Required information. The permanent nameplate must be marked clearly with the following information:

(A) The weighted energy factor (WEF); and

(B) The dedicated-purpose pool pump motor total horsepower.

(ii) Display of required information. All orientation, spacing, type sizes, typefaces, and line widths to display this required information must be the same as or similar to the display of the other performance data on the pump's permanent nameplate.

(A) The WEF must be identified in the form “WEF ____.”

(B) The dedicated-purpose pool pump motor total horsepower must be identified in one of the following forms: “Dedicated-purpose pool pump motor total horsepower _____,” “DPPP motor total horsepower _____,” “motor total horsepower _____,” “motor THP _____,” or “THP _____.”

(2) [Reserved]

[82 FR 36923, Aug. 7, 2017]

Appendix A to Subpart Y of Part 431—Uniform Test Method for the Measurement of Energy Consumption of Pumps

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
configuration
Pump sub-configurationApplicable test methods
Bare PumpBare Pump
OR
Pump + Single-Phase Induction Motor
OR
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**
OR
Pump + Submersible Motor
Section IV: Testing-Based Approach for Pumps Sold with Motors
OR
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
OR
Pump + Motor + Non-Continuous Controls
Pump + Polyphase Motor Covered by DOE's Electric Motor Energy Conservation Standards** + Continuous Control
OR
Pump + Submersible Motor + Continuous Control
Section VI: Testing-Based Approach for Pumps Sold with Motors and Controls
OR
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
OR
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 ControlsSection 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. Data Collection and Analysis

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:

eCFR graphic er25ja16.029.gif

View or download PDF

Where:

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:

eCFR graphic er25ja16.030.gif

View or download PDF

Where:

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

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.

B. Determine the pump energy rating for the minimally compliant reference pump (PERSTD), according to the following equation:

eCFR graphic er25ja16.031.gif

View or download PDF

Where:

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:

eCFR graphic er25ja16.032.gif

View or download PDF

Where:

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

i = load point corresponding to 75, 100, or 110 percent of the BEP flow rate.

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:

eCFR graphic er25ja16.033.gif

View or download PDF

Where:

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

i = load point corresponding to 75, 100, or 110 percent of the BEP flow rate.

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

Where:

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:

eCFR graphic er25ja16.034.gif

View or download PDF

Where:

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:

eCFR graphic er25ja16.035.gif

View or download PDF

Where:

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

i = load point corresponding to 75, 100, or 110 percent of the BEP flow rate.

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

Where:

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

i = load point corresponding to 75, 100, or 110 percent of the BEP flow rate.

B.1.2.1   Determine the full load motor losses using the appropriate motor efficiency value and horsepower as shown in the following equation:

eCFR graphic er25ja16.036.gif

View or download PDF

Where:

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:

eCFR graphic er25ja16.037.gif

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Where:

yi = the part load loss factor at load point i,

Pi = pump power input to the bare pump at load point i (hp),

MotorHP = the motor horsepower (hp), as determined in accordance with section II.B.1.2.1.1 of this appendix,

eCFR graphic er25ja16.038.gif

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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:

eCFR graphic er25ja16.039.gif

View or download PDF

Where:

PERCL = the pump energy rating for a constant load (hp),

ωi = 0.3333,

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

i = load point corresponding to 75, 100, or 110 percent of the BEP flow rate.

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:

eCFR graphic er25ja16.040.gif

View or download PDF

Where:

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), 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

i = load point corresponding to 75, 100, or 110 percent of the BEP flow rate.

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 = Lfull × yi

Where:

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

i = load point corresponding to 75, 100, or 110 percent of the BEP flow rate.

E.1.2.1   Determine the full load motor losses using the appropriate motor efficiency value and horsepower as shown in the following equation:

eCFR graphic er25ja16.041.gif

View or download PDF

Where:

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.

  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.

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:

eCFR graphic er25ja16.042.gif

View or download PDF

Where:

yi = the part load loss factor at load point i,

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),

eCFR graphic er25ja16.043.gif

View or download PDF

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:

(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

(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.

E. Calculating the Constant Load Pump Energy Rating. Determine the PERCL of each tested pump using the following equation:

eCFR graphic er25ja16.044.gif

View or download PDF

Where:

PERCL = the pump energy rating for a constant load (hp),

ωi = 0.3333,

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

i = load point corresponding to 75, 100, or 110 percent of the BEP flow rate.

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:

(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 V. 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

(4) Maintain total harmonic distortion below 12 percent throughout the test.

D. Testing BEP for the Bare 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 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 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.

E. Calculating the Constant Load Pump Energy Rating. Determine the PERCL of each tested pump using the following equation:

eCFR graphic er25ja16.045.gif

View or download PDF

Where:

PERCL = the pump energy rating for a constant load (hp),

ωi = 0.3333,

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

i = load point corresponding to 75, 100, or 110 percent of the BEP flow rate.

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:

eCFR graphic er25ja16.046.gif

View or download PDF

Where:

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, 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

i = load point corresponding to 75, 100, or 110 percent of the BEP flow rate.

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 = Lfull × Yi

Where:

Li = motor losses at load point i (hp),

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

i = load point corresponding to 75, 100, or 110 percent of the BEP flow rate.

E.1.2.1   Determine the full load motor losses using the appropriate motor efficiency value and horsepower as shown in the following equation:

eCFR graphic er25ja16.047.gif

View or download PDF

Where:

Lfull = motor losses at full load (hp),

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.

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:

eCFR graphic er25ja16.048.gif

View or download PDF

Where:

yi = the part load loss factor at load point i,

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

eCFR graphic er25ja16.049.gif

View or download PDF

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:

(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 VI. The following conditions also apply to the mains power supplied to the continuous or non-continuous control:

(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

(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 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:

eCFR graphic er25ja16.050.gif

View or download PDF

Where:

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:

eCFR graphic er25ja16.051.gif

View or download PDF

Where:

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:

eCFR graphic er25ja16.052.gif

View or download PDF

Where:

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:

(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 VII. 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

(4) Maintain total harmonic distortion below 12 percent throughout the test.

D. Testing BEP for the Bare 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 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.

E. Calculating the Variable Load Pump Energy Rating. Determine the PERVL of each tested pump using the following equation:

eCFR graphic er25ja16.053.gif

View or download PDF

Where:

PERVL = the pump energy rating for a variable load (hp);

ωi = 0.25;

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:

eCFR graphic er25ja16.054.gif

View or download PDF

Where:

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

i = load point corresponding to 25, 50, 75, or 100 percent of the BEP flow rate.

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:

eCFR graphic er25ja16.055.gif

View or download PDF

Where:

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

i = load point corresponding to 25, 50, or 75 percent of the measured BEP flow rate of the tested pump.

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

Where:

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

i = load point corresponding to 25, 50, 75, or 100 percent of the BEP flow rate.

E.1.2.1   Determine the full load motor losses using the appropriate motor efficiency value and horsepower as shown in the following equation:

eCFR graphic er25ja16.056.gif

View or download PDF

Where:

Lfull = motor losses at full load (hp),

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 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:

eCFR graphic er25ja16.057.gif

View or download PDF

Where:

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),

eCFR graphic er25ja16.058.gif

View or download PDF

Table 2—Default Nominal Full Load Submersible Motor Efficiency by Motor Horsepower and Pole

Motor horsepower
(hp)
Default nominal full load
submersible motor efficiency
2 poles4 poles
15568
1.56670
26870
37075.5
57475.5
7.56874
107074
157275.5
207277
257478.5
307780
4078.581.5
508082.5
6081.584
7581.585.5
10081.584
1258484
1508485.5
20085.586.5
25086.586.5

Table 3—Nominal Full Load Motor Efficiency Values

Nominal full load motor efficiency*
50.5
52.5
55.0
57.5
59.5
62.0
64.0
66.0
68.0
70.0
72.0
74.0
75.5
77.0
78.5
80.0
81.5
82.5
84.0
85.5
86.5
87.5
88.5
89.5
90.2
91.0
91.7
92.4
93.0
93.6
94.1
94.5
95.0
95.4
95.8
96.2
96.5
96.8
97.1
97.4
97.6
97.8
98.0
98.2
98.4
98.5
98.6
98.7
98.8
98.9
99.0

*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

Motor horsepower
(hp)
Coefficients for Motor and Control Part Load Loss
Factor (zi)
abc
≤5− 0.46581.49650.5303
>5 and ≤20− 1.31982.95510.1052
>20 and ≤50− 1.51223.07770.1847
>50− 0.89142.88460.2625

[81 FR 4145, Jan. 25, 2016, as amended at 82 FR 36924, Aug. 7, 2017]

Appendix B to Subpart Y of Part 431—Uniform Test Method for the Measurement of Energy Efficiency of Dedicated-Purpose Pool Pumps

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. General

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:

(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 value with which the motor was rated, and

(4) Maintain total harmonic distortion below 12 percent throughout the test.

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 varietiesSpeed configuration(s)Number of load points
(n)
Load point
(i)
Test points
Flow rate
(Q) (GPM)
Head
(H) (ft)
Speed
(rpm)
Self-Priming Pool Filter Pumps And Non-Self-Priming Pool Filter PumpsSingle-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 pump1HighQhigh (gpm) = Qmax_speed@C**H = 0.0082 × Qhigh2Maximum speed
   Two-speed dedicated-purpose pool pumps*2LowQlow (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 × Qlow2Lowest speed capable of meeting the specified flow and head values, if any***.
   HighQhigh (gpm) = Qmax_speed@C**H = 0.0082 × Qhigh2Maximum speed.
   Multi-speed and variable-speed dedicated-purpose pool pumps2LowQlow (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 × Qlow2Lowest speed capable of meeting the specified flow and head values.
   HighQhigh (gpm) ≥0.8 × Qmax_speed@C**H = 0.0082 × Qhigh2Lowest speed capable of meeting the specified flow and head values.
Waterfall PumpsSingle-speed dedicated-purpose pool pumps1HighQlow (gpm) = Flow corresponding to specified head17.0 ftMaximum speed.
Pressure Cleaner Booster PumpsAny1High10.0 gpm≥60.0 ftLowest 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. Calculations

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:

eCFR graphic er07au17.010.gif

View or download PDF

Where:

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)

DPPP varietiesSpeed configuration(s)Load point(s) i
Low flowHigh flow
Self-Priming Pool Filter Pumps and Non-Self-Priming Pool Filter PumpsSingle-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 pump1.0
   Two-speed dedicated-purpose pool pumps*0.800.20
   Multi-speed and variable-speed dedicated-purpose pool pumps0.800.20
Waterfall PumpsSingle-speed dedicated-purpose pool pumps1.0
Pressure Cleaner Booster PumpAny1.0

*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.

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:

eCFR graphic er07au17.011.gif

View or download PDF

Where:

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:

eCFR graphic er07au17.012.gif

View or download PDF

Where:

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:

eCFR graphic er07au17.013.gif

View or download PDF

Where:

PFi = true power factor at each load point i, dimensionless;

Pi = driver power input to the motor (or controls, if present) at each load point i, in watts;

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:

eCFR graphic er07au17.014.gif

View or download PDF

Where:

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:

eCFR graphic er07au17.015.gif

View or download PDF

Where:

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 curveSystem curve equation*
AH = 0.0167 × Q2
BH = 0.0500 × Q2
CH = 0.0082 × Q2
DH = 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]

Appendix C to Subpart Y of Part 431—Uniform Test Method for the Measurement of Energy Efficiency of Dedicated-Purpose Pool Pumps

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.

I. Test Procedure for Dedicated-Purpose Pool Pumps

A. General

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. 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 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.

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:

(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 value with which the motor was rated, and

(4) Maintain total harmonic distortion below 12 percent throughout the test.

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 varietiesSpeed configuration(s)Number of load points
(n)
Load point
(i)
Test points
Flow rate
(Q) (GPM)
Head
(H) (ft)
Speed
(rpm)
Self-Priming Pool Filter Pumps And Non-Self-Priming Pool Filter PumpsSingle-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 pump1HighQhigh (gpm) = Qmax_speed@C**H = 0.0082 × Qhigh2Maximum speed.
   Two-speed dedicated-purpose pool pumps*2LowQlow (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 × Qlow2Lowest speed capable of meeting the specified flow and head values, if any.***
   HighQhigh (gpm) = Qmax_speed@C**H = 0.0082 × Qlow2Maximum speed.
   Multi-speed and variable-speed dedicated-purpose pool pumps2LowQlow (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 × Qlow2Lowest speed capable of meeting the specified flow and head values.
   HighQhigh (gpm) ≥0.8 × Qmax_speed@C**H = 0.0082 × Qhigh2Lowest speed capable of meeting the specified flow and head values.
Waterfall PumpsSingle-speed dedicated-purpose pool pumps1HighQlow (gpm) = Flow corresponding to specified head17.0 ftMaximum speed.
Pressure Cleaner Booster PumpsAny1High10.0 gpm≥60.0 ftLowest 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. Calculations

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:

eCFR graphic er07au17.016.gif

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Where:

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)

DPPP varietiesSpeed configuration(s)Load point(s)
i
Low flowHigh flow
Self-Priming Pool Filter Pumps and Non-Self-Priming Pool Filter PumpsSingle-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 pump1.0
   Two-speed dedicated-purpose pool pumps*0.800.20
   Multi-speed and variable-speed dedicated-purpose pool pumps0.800.20
Waterfall PumpsSingle-speed dedicated-purpose pool pumps1.0
Pressure Cleaner Booster PumpAny1.0

*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.

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:

eCFR graphic er07au17.017.gif

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Where:

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:

eCFR graphic er07au17.018.gif

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Where:

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:

eCFR graphic er07au17.019.gif

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Where:

PFi = true power factor at each load point i, dimensionless;

Pi = driver power input to the motor (or controls, if present) at each load point i, in watts;

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:

(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.

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:

eCFR graphic er07au17.020.gif

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Where:

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   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]

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