§ 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 that have the characteristics listed in paragraph (a)(1)(iii) of this section. ( 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 ) The additional following categories of clean water pumps that have the characteristics listed in paragraph (a)(1)(iii) of this section: ( A ) Radially-split, multi-stage, horizontal, end-suction diffuser casing (RSHES);
( B ) Radially-split, multi-stage, horizontal, in-line diffuser casing (RSHIL);
( C ) Small vertical in-line (SVIL); and
( D ) Vertical Turbine (VT).
( iii ) Pump 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 wholly or partially in the range of 15 to 250 °F;
( D ) Designed to operate with either: ( 1 ) A 2- or 4- or 6-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/or 960 and 1,439 revolutions per minute, and in each case, the driver and impeller must rotate at the same speed;
( E ) For ST, and VT 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.
( 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.
( c ) *Circulator pumps* — ( 1 ) *Scope.* This paragraph (c) provides the test procedures for determining the circulator energy index for circulator pumps that are also clean water pumps, including on-demand circulator pumps and circulators-less-volute, and excluding submersible pumps and header pumps.
( 2 ) *Testing and calculations.* Determine the circulator energy index (CEI) using the test procedure set forth in appendix D of this subpart Y.
[82 FR 36923, Aug. 7, 2017, as amended at 87 FR 57299, Sept. 19, 2022; 88 FR 17978, Mar. 24, 2023]