Federal Register - December 20, 2021
Versione di testo Cosa è?Dateas è un sito indipendente non affiliato a entità governative. La fonte dei documenti PDF che pubblichiamo qui è l'entità governativa indicata in ciascuno di essi. Le versioni in testo sono trascrizioni che realizziamo per facilitare l'accesso e la ricerca di informazioni, ma possono contenere errori o non essere complete.
Source: Federal Register
72141
Federal Register / Vol. 86, No. 241 / Monday, December 20, 2021 / Proposed Rules
p.m,lreduced .
-QR,i QT,j pT,J.
Where:
CER = circulator energy rating hp;
wi = weight of 0.05, 0.40, 0.40, and 0.15 at test points of 25, 50, 75, and 100 percent of BEP flow, respectively;
Pin,i = driver power input at each test point i hp; and i = test points, corresponding to 25, 50, 75, and 100 percent of the flow at BEP.
C. Circulator pumps with external input signal control in addition to other control varieties, or which can be operated without an external input signal.
C.1 Determination of circulator pump driver power input.
C.1.1 Determine the driver power input at 25, 50, and 75 percent of the measured BEP
flow rate at maximum speed as determined according to section I.E.2 of this appendix of
Where:
Pin,i_reduced = the driver power input hp;
HR,i = the specified head at load point i based on the reference system curve ft;
HT,j = the tested head at load point j ft;
QR,i = the specified flow rate at load point i based on the reference system curve gpm;
QT,j = the tested flow rate at load point j gpm; and PT,i = the tested driver power input at load point j hp.
C.1.2.4 If the tested head value is below the head load point specified by the reference system curve by more than 10 percent, the test point must be retested.
C.2 Calculating the circulator energy rating. Determine the CER of each tested circulator pump using the following equation:
Where:
CER = circulator energy rating hp;
zmax = speed factor weight of 0.30;
Pin_max = weighted average input power at maximum rotating speed of the circulator pump hp, calculated in
accordance with section II.C.2.1 of this appendix;
zreduced = speed factor weight of 0.70; and
VerDate Sep<11>2014
18:33 Dec 17, 2021
Jkt 256001
CER
=
L lu/Pin,a i
PO 00000
Frm 00047
Fmt 4701
Sfmt 4702
p..
-
m,lreduced -
E:FRFM20DEP2.SGM
20DEP2
_
,l p.
H QR
H . Q . T,J
T,J
T,J
EP20DE21.026
A. Scope.
A.1 This section II applies only to circulator pumps sold with only external input signal controls and circulator pumps sold with external input signal controls in addition to other control varieties.
B. Circulator pumps with only external input signal control, and which cannot be operated without an external input signal.
B.1 Adjust the speed of the pump using a manual speed adjustment or with a simulated external signal to activate the external signal input control to achieve flow rates of 25, 50, 75, and 100 percent of the BEP flow rate as determined according to section I.E.2 of this appendix with head values that are at or above the reference system curve defined in section I.E.3 of this appendix. Measure the driver power input at those flow rates.
B.1.1 All tested flow values must be within 5 percent of the target flow load points as specified by the reference system curve.
B.1.2 For tested head values more than 10
percent above the head load points specified by the reference system curve, adjust the tested driver power input to the specified flow point using the following equation:
EP20DE21.027
Where:
Pin,i_reduced = the driver power input hp;
QR,i = the specified flow rate at load point i based on the reference system curve gpm;
QT,j = the tested flow rate at load point j gpm; and PT,j = the tested driver power input at load point j hp.
C.1.2.3 For tested head values within 10
percent of the head load points specified by the reference system curve, adjust the tested driver power input to the specified flow and head point using the following equation:
EP20DE21.025
Where:
Pin,i = the driver power input hp;
HR,i = the specified head at load point i based on the reference system curve ft;
HT,j = the tested head at load point j ft;
QR,i = the specified flow rate at load point i based on the reference system curve gpm;
QT,j = the tested flow rate at load point j gpm; and PT,j = the tested driver power input at load point j hp.
B.1.4 If the tested head value is below the head load point specified by the reference system curve by more than 10 percent, the test point must be retested.
B.2. Calculating the circulator energy rating. Determine the CER of each tested circulator pump using the following equation:
EP20DE21.024
pm,i . . = HR,i QR,i p .
H . Q . T,J
T,J T,J
EP20DE21.023
khammond on DSKJM1Z7X2PROD with PROPOSALS2
II. Testing and Calculation of CER for Circulator Pumps With External Input Signal Controls
Where:
Pin,i = the driver power input hp;
QR,i = the specified flow rate at load point i based on the reference system curve gpm;
QT,j = the tested flow rate at load point j gpm; and PT,j = the tested driver power input at load point j hp.
B.1.3 For tested head values within 10
percent of the head load points specified by the reference system curve, adjust the tested driver power input to the specified flow and head point using the following equation:
the tested circulator pump in accordance with Appendix E of HI 40.62021.
C.1.2 Determine the driver power input at 100 percent of BEP flow at maximum speed and at 25, 50, 75 percent of the BEP flow rate and reduced speed by using a manual speed adjustment or a simulated external input signal to adjust the speed of the driver to achieve those flow rates with a head value at or above the reference system curve defined in section I.E.3 of this appendix. Measure the driver power input at those flow rates.
C.1.2.1 All tested flow values must be within 5 percent of the target flow load points as specified by the reference system curve.
C.1.2.2 For tested head values more than 10 percent above the head load points specified by the reference system curve, adjust the tested driver power input to the specified flow point using the following equation:
EP20DE21.022
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 = true RMS voltage at each load point i, in volts;
Ii = true RMS current at each load point i, in amps; and i = load points, defined uniquely for each circulator pump control variety as specified in sections II, III, IV, V, or VI
of this appendix.
pin,i = QR,ip QT,j T,j
EP20DE21.021
measured at BEP and full impeller diameter for the rated pump.
G.3 Determine the true power factor at each applicable load point specified in sections II, III, IV, V, or VI of this appendix for each circulator pump control variety as a ratio of driver power input to the motor or controls, if present Pi, in watts, divided by the product of the true RMS voltage in volts and the true RMS current in amps at each load point i, as shown in the following equation:
