Source: https://www.ecfr.gov/cgi-bin/text-idx?mc=true&node=sp10.3.431.e&rgn=div6
Timestamp: 2019-12-11 01:42:07
Document Index: 459114113

Matched Legal Cases: ['art 431', '§431', '§431', '§431', '§431', '§431', '§431', '§431', '§429', '§429', '§429', '§431', '§431', '§431', '§429', '§431', '§431', '§431', '§431', '§431', '§431', '§431', '§429', '§429', '§431', '§429', '§431', '§431', '§431', '§429', '§431', '§429', '§429', '§431']

Title 10 → Chapter II → Subchapter D → Part 431 → Subpart E
§431.81 Purpose and scope.
§431.82 Definitions concerning commercial packaged boilers.
§431.87 Energy conservation standards and their effective dates.
Source: 69 FR 61960, Oct. 21, 2004, unless otherwise noted.
This subpart contains energy conservation requirements for certain commercial packaged boilers, pursuant to Part C of Title III of the Energy Policy and Conservation Act. (42 U.S.C. 6311-6317)
[69 FR 61960, Oct. 21, 2004, as amended at 70 FR 60415, Oct. 18, 2005]
Combustion efficiency for a commercial packaged boiler is a measurement of how much of the fuel input energy is converted to useful heat in combustion and is calculated as 100-percent minus percent losses due to dry flue gas, incomplete combustion, and moisture formed by combustion of hydrogen, as determined with the test procedures prescribed under §431.86 of this chapter.
Commercial packaged boiler means a packaged boiler that meets all of the following criteria:
(1) Has rated input of 300,000 Btu/h or greater;
(2) Is, to any significant extent, distributed in commerce for space conditioning and/or service water heating in buildings but does not meet the definition of “hot water supply boiler” in this part;
(3) Does not meet the definition of “field-constructed” in this section; and
(4) Is designed to:
(i) Operate at a steam pressure at or below 15 psig;
(ii) Operate at or below a water pressure of 160 psig and water temperature of 250 °F; or
(iii) Operate at the conditions specified in both paragraphs (4)(i) and (ii) of this definition.
Field-constructed means custom-designed equipment that requires welding of structural components in the field during installation. For the purposes of this definition, welding does not include attachment using mechanical fasteners or brazing; any jackets, shrouds, venting, burner, or burner mounting hardware are not structural components.
Fuel input rate for a commercial packaged boiler means the measured rate at which the commercial packaged boiler uses energy and is determined using test procedures prescribed under §431.86 of this chapter.
Packaged boiler means a boiler that is shipped complete with heating equipment, mechanical draft equipment, and automatic controls and is usually shipped in one or more sections. If the boiler is shipped in more than one section, the sections may be produced by more than one manufacturer, and may be originated or shipped at different times and from more than one location.
Rated input means the maximum rate at which the commercial packaged boiler has been rated to use energy as indicated by the nameplate and in the manual shipped with the commercial packaged boiler.
Thermal efficiency for a commercial packaged boiler is determined using test procedures prescribed under §431.86 and is the ratio of the heat absorbed by the water or the water and steam to the higher heating value in the fuel burned.
[69 FR 61960, Oct. 21, 2004, as amended at 74 FR 36354, July 22, 2009; 76 FR 12503, Mar. 7, 2011; 78 FR 79598, Dec. 31, 2013; 81 FR 89304, Dec. 9, 2016]
(a) Each commercial packaged boiler listed in Table 1 of this section and manufactured on or after the effective date listed must meet the indicated energy conservation standard.
Table 1—Commercial Packaged Boiler Energy Conservation Standards
*Where EC is combustion efficiency and ET is thermal efficiency.
(b) Each commercial packaged boiler listed in Table 2 of this section and manufactured on or after the effective date listed in Table 2 must meet the indicated energy conservation standard.
Table 2—Commercial Packaged Boiler Energy Conservation Standards
March 2, 2022*
Steam Commercial Packaged Boilers Gas-fired—natural draft ≥300,000 Btu/h and ≤2,500,000 Btu/h 79.0% ET.
Steam Commercial Packaged Boilers Gas-fired—natural draft >2,500,000 Btu/h 79.0% ET.
*Where ET is thermal efficiency.
Note: Prior to December 4, 2017, manufacturers must make any representations with respect to the energy use or efficiency of commercial packaged boilers in accordance with the results of testing pursuant to this Appendix or the test procedures as they appeared in 10 CFR 431.86 revised as of January 1, 2016. On and after December 4, 2017, manufacturers must make any representations with respect to energy use or efficiency in accordance with the results of testing pursuant to this appendix.
For purposes of this appendix, the Department of Energy incorporates by reference the definitions established in section 3 of the American National Standards Institute (ANSI) and Air-Conditioning, Heating, and Refrigeration Institute (AHRI) Standard 1500, “2015 Standard for Performance Rating of Commercial Space Heating Boilers,” beginning with 3.1 and ending with 3.35 (incorporated by reference, see §431.85; hereafter “ANSI/AHRI Standard 1500-2015”), excluding the introductory text to section 3, the introductory text to section 3.2, “Boiler”; 3.2.4, “Heating Boiler”; 3.2.7, “Packaged Boiler”; 3.6, “Combustion Efficiency”; 3.12, “Efficiency, Combustion”; 3.13, “Efficiency, Thermal”; 3.20, “Gross Output”; 3.23, “Input Rating”; 3.24, “Net Rating”; 3.26, “Published Rating”; 3.26.1, “Standard Rating”; 3.27, “Rating Conditions”; 3.27.1, “Standard Rating Conditions”; and 3.31, “Thermal Efficiency.” In cases where there is a conflict, the language of the test procedure in this appendix takes precedence over ANSI/AHRI Standard 1500-2015.
1.1. In all incorporated sections of ANSI/AHRI Standard 1500-2015, references to the manufacturer's “specifications,” “recommendations,” “directions,” or “requests” mean the manufacturer's instructions in the installation and operation manual shipped with the commercial packaged boiler being tested or in supplemental instructions provided by the manufacturer pursuant to §429.60(b)(4) of this chapter. For parameters or considerations not specified in this appendix, refer to the manual shipped with the commercial packaged boiler. Should the manual shipped with the commercial packaged boiler not provide the necessary information, refer to the supplemental instructions for the basic model pursuant to §429.60(b)(4) of this chapter. The supplemental instructions provided pursuant to §429.60(b)(4) of this chapter do not replace or alter any requirements in this appendix nor do they override the manual shipped with the commercial packaged boiler. In cases where these supplemental instructions conflict with any instructions or provisions provided in the manual shipped with the commercial packaged boiler, use the manual shipped with the commercial packaged boiler.
1.2. Unless otherwise noted, in all incorporated sections of ANSI/AHRI Standard 1500-2015, the term “boiler” means a commercial packaged boiler as defined in §431.82.
1.3. Unless otherwise noted, in all incorporated sections of ANSI/AHRI Standard 1500-2015, the term “input rating” means “rated input” as defined in §431.82.
2.1.1. Instrumentation. Use instrumentation meeting the minimum requirements found in Table C1 of Appendix C of ANSI/AHRI Standard 1500-2015 (incorporated by reference, see §431.85).
Table 2.1—Data To Be Recorded Before Testing
Oil Analysis—H, C, API Gravity, lb/gal and Btu/lb None.
Gas Heating Value, Btu/ft3* Record at start and end of test.
*Multiplied by correction factors, as applicable, in accordance with Appendix E of ANSI/AHRI Standard 1500-2015.
2.1.3. Instrument Calibration. Instruments must be calibrated at least once per year and a calibration record, containing at least the date of calibration and the method of calibration, must be kept as part of the data underlying each basic model certification, pursuant to §429.71 of this chapter.
2.1.4. Test Setup and Apparatus. Set up the commercial packaged boiler for thermal efficiency testing according to the provisions of Section C2 (except section C2.1) of Appendix C of ANSI/AHRI Standard 1500-2015 (incorporated by reference, see §431.85).
2.1.5. Additional Requirements for Outdoor Commercial Packaged Boilers. If the manufacturer provides more than one outdoor venting arrangement, the outdoor commercial packaged boiler (as defined in Section 3.2.6 of ANSI/AHRI Standard 1500-2015; incorporated by reference, see §431.85) must be tested with the shortest total venting arrangement as measured by adding the straight lengths of venting supplied with the equipment. If the manufacturer does not provide an outdoor venting arrangement, install the outdoor commercial packaged boiler venting consistent with the procedure specified in Section C2.2 of Appendix C of ANSI/AHRI Standard 1500-2015.
2.1.6. Additional Requirements for Steam Tests. In addition to the provisions of Section C2 of Appendix C of ANSI/AHRI Standard 1500-2015 (incorporated by reference, see §431.85), the following requirements apply for steam tests.
2.1.7. Additional Requirements for Water Tests. In addition to the provisions of section C2 of Appendix C of ANSI/AHRI Standard 1500-2015 (incorporated by reference, see §431.85), the following requirements apply for water tests.
2.1.7.2. Install a temperature measuring device at Point B of Figure C9 of ANSI/AHRI Standard 1500-2015 (incorporated by reference, see §431.85). Water entering the commercial packaged boiler must first enter the run of a tee and exit from the top outlet of the tee. The remaining connection of the tee must be plugged. Measure the inlet water temperature at Point B in the run of a second tee located 12 ± 2 pipe diameters downstream from the first tee and no more than the greater of 12 inches or 6 pipe diameters from the inlet of the commercial packaged boiler. The temperature measuring device shall extend into the water flow at the point of exit from the side outlet of the second tee. All inlet piping between the temperature measuring device and the inlet of the commercial packaged boilers must be wrapped with R-7 insulation.
2.1.8. Flue Gas Sampling. In section C2.5.2 of Appendix C of ANSI/AHRI Standard 1500-2015, replace the last sentence with the following: When taking flue gas samples from a rectangular plane, collect samples at 1⁄4 , 1⁄2 , and 3⁄4 the distance from one side of the rectangular plane in the longer dimension and along the centerline midway between the edges of the plane in the shorter dimension and use the average of the three samples. The tolerance in each dimension for each measurement location is ± 1 inch.
2.2.1. General. Use the test conditions from Section 5 and Section C3 of Appendix C of ANSI/AHRI Standard 1500-2015 (incorporated by reference, see §431.85) for thermal efficiency testing but do not use the following sections:
Table 2.4—Flue Gas Temperature Variation Limits During Test Period
2.3.1. General. Conduct the thermal efficiency test as prescribed in Section C4 “Test Procedure” of Appendix C of ANSI/AHRI Standard 1500-2015 (incorporated by reference, see §431.85) excluding sections:
2.3.1.1. Adjust oil or non-atmospheric gas to produce the required firebox pressure and CO2 or O2 concentration in the flue gas, as described in Section 5.3.1 of ANSI/AHRI Standard 1500-2015. Conduct steam tests with steam pressure at the pressure specified in the manufacturer literature shipped with the commercial packaged boiler or in the manufacturer's supplemental testing instructions pursuant to §429.60(b)(4) of this chapter, but not exceeding 15 psig. If no pressure is specified in the manufacturer literature shipped with the commercial packaged boiler or in the manufacturer's supplemental testing instructions (pursuant to §429.60(b)(4) of this chapter), or if a range of operating pressures is specified, conduct testing at a steam pressure equal to atmospheric pressure. If necessary to maintain steam quality as required by Section 5.3.7 of ANSI/AHRI Standard 1500-2015, increase steam pressure in 1 psig increments by throttling with a valve beyond the separator until the test is completed and the steam quality requirements have been satisfied, but do not increase the steam pressure to greater than 15 psig.
3.1.1. Instrumentation. Use instrumentation meeting the minimum requirements found in Table C1 of ANSI/AHRI Standard 1500-2015 (incorporated by reference, see §431.85).
Table 3.1—Data To Be Recorded Before Testing
3.1.3. Instrument Calibration. Instruments must be calibrated at least once per year and a calibration record, containing at least the date of calibration and the method of calibration, must be kept as part of the data underlying each basic model certification, pursuant to §429.71 of this chapter.
3.1.5. Additional Requirements for Outdoor Commercial Packaged Boilers. If the manufacturer provides more than one outdoor venting arrangement, the outdoor commercial packaged boiler (as defined in section 3.2.6 of ANSI/AHRI Standard 1500-2015 (incorporated by reference, see §431.85) must be tested with the shortest total venting arrangement as measured by adding the straight lengths of venting supplied with the equipment. If the manufacturer does not provide an outdoor venting arrangement, install the outdoor commercial packaged boiler venting consistent with the procedure specified in Section C2.2 of Appendix C of ANSI/AHRI Standard 1500-2015.
3.1.7. Additional Requirements for Water Tests. In addition to the provisions of Section C2 of Appendix C of ANSI/AHRI Standard 1500-2015 (incorporated by reference, see §431.85) the following requirements apply for water tests:
3.1.8. Flue Gas Sampling. In section C2.5.2 of Appendix C of ANSI/AHRI Standard 1500-2015, replace the last sentence with the following: When taking flue gas samples from a rectangular plane, collect samples at 1⁄4 , 1⁄2 , and 3⁄4 the distance from one side of the rectangular plane in the longer dimension and along the centerline midway between the edges of the plane in the shorter dimension and use the average of the three samples. The tolerance in each dimension for each measurement location is ± 1 inch.
3.2.1. General. Use the test conditions from Sections 5 and C3 of Appendix C of ANSI/AHRI Standard 1500-2015 (incorporated by reference; see §431.85) for combustion efficiency testing but do not use the following sections:
3.2.3.1. For field tests, the inlet temperature measured at Point A and Point B in Figure C9 and the outlet temperature measured and Point C in Figure C9 of ANSI/AHRI Standard 1500-2015 must be recorded in the data underlying that model's certification pursuant to §429.71 of this chapter, and the difference between the inlet (measured at Point B) and outlet temperature (measured at Point C) must not be less than 20 °F at any point during the “Warm-up Period” and “Test Period,” after stabilization has been achieved, as indicated by 1-minute interval data pursuant to Table 3.2 of this appendix.
Table 3.3—Flue Gas Temperature Variation Limits During Test Period
3.3.1.1. The duration of the “Test Period” for combustion efficiency outlined in sections C4.1.1.2 of Appendix C of ANSI/AHRI Standard 1500-2015 (incorporated by reference, see §431.85) and C4.1.2.2 of Appendix C of ANSI/AHRI Standard 1500-2015 is 30 minutes. For condensing commercial packaged boilers, condensate must be collected for the 30 minute Test Period.
3.3.1.2. Adjust oil or non-atmospheric gas to produce the required firebox pressure and CO2 or O2 concentration in the flue gas, as described in section 5.3.1 of ANSI/AHRI Standard 1500-2015. Conduct steam tests with steam pressure at the pressure specified in the manufacturer literature shipped with the commercial packaged boiler or in the manufacturer's supplemental testing instructions pursuant to §429.60(b)(4) of this chapter, but not exceeding 15 psig. If no pressure is specified in the manufacturer literature shipped with the commercial packaged boiler or in the manufacturer's supplemental testing instructions (pursuant to §429.60(b)(4)) of this chapter, or if a range of operating pressures is specified, conduct testing at a steam pressure equal to atmospheric pressure. If necessary to maintain steam quality as required by section 5.3.7 of ANSI/AHRI Standard 1500-2015, increase steam pressure in 1 psig increments by throttling with a valve beyond the separator until the test is completed and the steam quality requirements have been satisfied, but do not increase the steam pressure to greater than 15 psig.
3.4.1. General. To determine the combustion efficiency of commercial packaged boilers, use the variables in Section C6 and calculation procedure for the combustion efficiency test specified in Section C7.3 of Appendix C (including the specified subsections of C7.2) of ANSI/AHRI Standard 1500-2015 (incorporated by reference, see §431.85).