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Federal Register / Vol. 86, No. 87 / Friday, May 7, 2021 / Proposed Rules
p.inreduced
=L
w-lreduced P-m,ireduced .

i
9 Where:
Pin_reduced = weighted average input power at reduced speeds of the circulator hp;
wi_reduced = 0.3333;
Pin,i_reduced = power input to the driver at reduced rotating speed of the circulator at each test point i hp; and i = test points, defined as 25, 50, and 75
percent of the flow at BEP of max speed and head values at or above the reference curve.

Docket No. EERE2016BTSTD0004, No. 58 Recommendations 6B and 7 at pp. 56
The CPWG recommended the speed factors of 0.30 at maximum speed and 0.70 at reduced speed in order to produce a rating on an equivalent basis as that of a circulator pump with a
PERcIRc
typical differential pressure control.
Docket No. EERE2016BTSTD0004, No. 58 at p. 6. In addition, these speed factors would represent the likelihood that a circulator pump with an external input signal control is selected to operate with that external input signal control, and whether the signal it receives results in the circulator pump reducing speed.
DOE requests comment on the CPWGrecommended test method for circulator pumps distributed in commerce with only external input signal controls, as well as for those distributed in commerce with external input signal controls in addition to other control varieties. Specifically, DOE requests comment on whether the technology or
=

market for such controls has changed sufficiently since the term sheet to warrant a different approach.
g. No Controls For circulator pumps with no controls, the CPWG recommended testing the pump along the maximum speed circulator pump curve to achieve the test point flow rates of 25, 50, 75, and 100 percent of BEP flow. Docket No. EERE2016BTSTD0004, No. 58
Recommendation 9 at p. 7 The CPWG
also recommended that for circulator pumps distributed in commerce with no controls, PERCIRC should be calculated with the unique weights and test points as shown in equation 10:

L

WtPtn,J

i
Where:
PERCIRC = circulator pump energy rating hp;
wi = 0.25;
Pin,i = power input to the driver at each test point i hp; and i = test points, defined as 25, 50, 75, and 100 percent of the flow at BEP.

Docket No. EERE2016BTSTD0004, No. 58 Recommendation 6A at pp. 4
5 The CPWG recommended the 0.25
weights at each test point i.e., 25, 50, 75, and 100 percent of the flow at BEP
in order to account for the variety of systems and operating points a singlespeed circulator may encounter. Docket No. EERE2016BTSTD0004, No. 70
at pp. 172173
DOE requests comment on the CPWGrecommended test methods, test points, and weights for circulator pumps with no controls.
2. Updates to Industry Standards As part of the September 2016 CPWG
recommendations, the CPWG
recommended that all test points be tested on a wire-to-water basis, in accordance with HI 40.62014, with minor modifications. The CPWG also recommended that if an updated version
VerDate Sep<11>2014

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of HI 40.6 is published prior to publication of the test procedure final rule, DOE should review and incorporate the updated version.
Docket No. EERE2016BTSTD0004, No. 58, Recommendation 10 at p. 89
In 2016, HI published an updated industry standard, HI 40.62016, Methods for Rotodynamic Pump Efficiency Testing HI 40.62016.
This update aligned the definitions and procedures described in HI Standard 40.6 with the DOE test procedure for pumps published in the January 2016
TP final rule. Appendix A to subpart Y
to 10 CFR part 431. In the September 2020 Early Assessment RFI for pumps, DOE requested comment on the potential effect of incorporating HI
40.62016 by reference as the DOE test procedure for pumps. 85 FR 60734, 60737. Grundfos, NEEA, and HI
commented that HI expects to publish another standard update in 2021 HI
40.62021 and urged DOE to incorporate by reference HI 40.62021
rather than HI 40.62016 Grundfos, Docket No. EERE2020BTTP0032, No. 07 at p. 2; NEEA, Docket No. EERE
2020BTTP0032, No. 08 at p. 6; HI, Docket No. EERE2020BTTP0032,
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No. 06 at pp. 1, 3. HI specified that HI
40.62016 included updates to match DOEs test procedure for pumps, and that HI 40.62021 will further include editorial revisions and added circulator pump testing, and also would not impact measured values, burden, or representativeness. HI, Docket No.
EERE2020BTTP0032, No.06 at p. 3
At the time of this RFI publication, HI
40.62021 was not yet available. DOE
expects to review and consider this updated industry standard when available.
DOE seeks comment and feedback on whether HI 40.62016 or HI 40.62021
is an appropriate test method for conducting wire-to-water testing of circulator pumps, as recommended by the CPWG. In addition, DOE seeks comment on whether the modifications in HI 40.62016 and/or HI 40.62021
adequately capture the CPWG
recommended modifications in Recommendation 10.
Additionally, CPWG recommended several specifications for the circulator pump test procedure that are not included in either HI 40.62014 or HI
40.62016, including test arrangements for twin-head circulator pumps and circulators-less-volute:

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