[Code of Federal Regulations]
[Title 10, Volume 3]
[Revised as of January 1, 2006]
From the U.S. Government Printing Office via GPO Access
[CITE: 10CFR431.86]
[Page 419-421]
TITLE 10--ENERGY
CHAPTER II--DEPARTMENT OF ENERGY
PART 431_ENERGY EFFICIENCY PROGRAM FOR CERTAIN COMMERCIAL AND INDUSTRIAL
EQUIPMENT--Table of Contents
Subpart E_Commercial Packaged Boilers
Sec. 431.86 Uniform test method for the measurement of energy efficiency
of commercial packaged boilers.
(a) Scope. This section provides test procedures that must be
followed for measuring, pursuant to EPCA, the steady state combustion
efficiency of a gas-fired or oil-fired commercial packaged boiler. These
test procedures apply to packaged low pressure boilers that have rated
input capacities of 300,000 Btu/hr or more and are ``commercial packaged
boilers, but do not apply under EPCA to ``packaged high pressure
boilers.''
(b) Definitions. For purposes of this section, the Department
incorporates by reference the definitions specified in Section 3.0 of
the HI BTS-2000 (Incorporated by reference, see Sec. 431.85), with the
exception of the definition for the terms ``packaged boiler'',
``condensing boilers'', and ``packaged low pressure steam'' and ``hot
water boiler''.
(c) Test Method for Commercial Packaged Boilers--General. After
October 23, 2006, follow the provisions in this paragraph (c) for all
testing of packaged low pressure boilers that are commercial packaged
boilers. Prior to that date, follow either the provisions of this
paragraph (c) or of paragraph (d) of this section to test steel boilers,
but follow the provisions of this paragraph for all other commercial
packaged boilers.
(1) Test Setup--(i) Classifications: If employing boiler
classification, you must classify boilers as given in Section 4.0 of the
HI BTS-2000 (Incorporated by reference, see Sec. 431.85).
(ii) Requirements: Conduct the combustion efficiency test as given
in Section 5.2 (Combustion Efficiency Test) of the HI BTS-2000
(Incorporated by reference, see Sec. 431.85).
(iii) Instruments and Apparatus:
(A) Follow the requirements for instruments and apparatus in
sections 6 (Instruments) and 7 (Apparatus), of the HI BTS-2000
(Incorporated by reference, see Sec. 431.85), with the exception of
section 7.2.5 (flue connection for outdoor boilers) which is replaced
with paragraph (c)(1)(iii)(B) of this section:
(B) Flue Connection for Outdoor Boilers: For oil-fired and power gas
outdoor boilers, the integral venting means may have to be revised to
permit connecting the test flue apparatus described in section 7.2.1 of
BTS-2000. A gas-fired boiler for outdoor installation with a venting
system provided as part of the boiler must be tested with the venting
system in place.
(iv) Test Conditions: Use test conditions from Section 8.0
(excluding 8.5.2, 8.5.3, and 8.6.2) of HI BTS-2000 (Incorporated by
reference, see Sec. 431.85) for the combustion efficiency testing, and
use paragraph (c)(1)(iv)(A) of this section when testing a condensing
boiler:
(A) Water Temperatures for Condensing Boilers--For condensing
boilers the outlet temperature shall be 180 [deg]F2 [deg]F and the inlet temperature shall be 80
[deg]F5 [deg]F at all times during the test. (See
also paragraphs (c)(2)(i) and (ii) of this section for condensing
boilers.).
(B) [Reserved]
(2) Test Measurements. (i) Measure for combustion efficiency
according to sections 9.1 (excluding sections 9.1.1.2.3 and 9.1.2.2.3),
9.2 and 10.2 of the HI BTS-2000 (Incorporated by reference, see Sec.
431.85), except that for condensing boilers, replace the boiler water
inlet temperature in section 9.1.2.1.4 of the HI BTS-2000 standard with
the inlet
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temperature specified in paragraph (c)(1)(iv)(A) of this section.
(ii) Procedure for the Measurement of Condensate for a Condensing
Boiler. Collect flue condensate as specified in Section 9.2.2 of HI BTS-
2000 (Incorporated by reference, see Sec. 431.85). Measure the
condensate from the flue gas under steady state operation for the 30
minute collection period during the 30 minute steady state combustion
efficiency test. Flue condensate mass shall be measured immediately at
the end of the 30 minute collection period to prevent evaporation loss
from the sample. The humidity of the room shall at no time exceed 80
percent. Determine the mass of flue condensate for the steady state
period by subtracting the tare container weight from the total container
and flue condensate weight measured at the end of the test period.
(iii) A Boiler That is Capable of Supplying Either Steam or Hot
Water--(A) Testing. For purposes of EPCA, measure the combustion
efficiency of a commercial packaged boiler capable of supplying either
steam or hot water either by testing the boiler in the steam mode or by
testing it in both the steam and hot water modes.
(B) Rating. If testing the boiler only in the steam mode, use the
efficiency determined from such testing to rate the boiler for both the
steam and water modes. If testing the boiler in both modes, rate the
boiler's efficiency for each mode based on the testing in that mode.
(3) Calculation of Combustion Efficiency. Use the calculation
procedure for the combustion efficiency test specified in Section 11.2
(including the specified subsections of 11.1) of the HI BTS-2000
(Incorporated by reference, see Sec. 431.85).
(d) Steel Commercial Packaged Boilers--Alternative Test Method.
Until October 23, 2006, follow either the provisions of this paragraph
(d), or of paragraph (c) of this section, to test steel commercial
packaged boilers.
(1) Test setup. Instead of using HI BTS-2000 as specified in
paragraph (c)(1) of this section, conduct the combustion efficiency test
for steel packaged low pressure boilers that are commercial packaged
boilers using the Abbreviated Efficiency Test (Simplified Efficiency
Test or The Short Form) as specified in ASME PTC 4.1 (Incorporated by
reference, see Sec. 431.85). If selecting the ASME PTC 4.1 procedure
for conducting the required combustion efficiency test for steel
boilers, conduct the test under conditions as specified in paragraphs
(d)(1)(i) and (ii) of this section.
(i) Use the test procedure for the efficiency test from ASME PTC 4.1
(Incorporated by reference, see Sec. 431.85). Conduct the combustion
efficiency test with the Abbreviated Efficiency Test (Simplified
Efficiency Test or The Short Form) for gas and oil fuels described in
Section 1.07 of ASME PTC 4.1 (Incorporated by reference, see Sec.
431.85).
(ii) Test Conditions for the Combustion Efficiency.
(A) Steam pressure for steam boilers--Test must be made at
atmospheric pressure or at a pressure not exceeding 2 psig.
(B) Water temperature for hot water boilers--The inlet temperature
must be 35 [deg]F to 80 [deg]F, except that when a boiler is tested in
the field after installation the inlet temperature may be as recommended
by the manufacturer, but must not exceed 140 [deg]F. The outlet
temperature shall be 180 [deg]F 2 [deg]F.
(C) After steady state operation is achieved, the minimum duration
of a test run shall be 30 minutes.
(2) Test Measurements. Use the test procedure from Section 5,
Efficiency by Heat Loss Method, of ASME PTC 4.1 (Incorporated by
reference, see Sec. 431.85). Use the test conditions as specified in
paragraph (d)(1) of this section. For a boiler that is capable of
supplying either steam or hot water, follow paragraph (c)(2)(iii) of
this section.
(3) Calculation of Combustion Efficiency. Use the heat loss method
for gas or oil fuel as specified in Section 7.3 and the Test Forms for
the Abbreviated Efficiency Test, PTC 4.1-a (Summary Sheet) and PTC 4.1-b
(Calculation Sheet), of ASME PTC 4.1 to determine the combustion
efficiency, except that the following specific heat loss terms (as
listed in Section 7.3 of ASME PTC 4.1) to 0: sections 7.3.2.03 (moisture
in fuel), 7.3.2.01 (combustible in dry refuse), 7.3.2.10 (radiation to
surroundings), 7.3.2.05 through 7.3.2.09 and 7.3.2.11 through 7.3.2.14
(unmeasured
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losses) must be set. (Incorporated by reference, see Sec. 431.85)
Energy Efficiency Standards