81 FR 36295 - Notice of Petition for Waiver of HTP, Inc. From the Department of Energy Commercial Water Heater Test Procedure
DEPARTMENT OF ENERGY
Office of Energy Efficiency and Renewable Energy Federal Register Volume 81, Issue 108 (June 6, 2016)
Office of Energy Efficiency and Renewable Energy
Federal Register Volume 81, Issue 108 (June 6, 2016)
| Page Range | 36295-36300 | |
| FR Document | 2016-13245 |
[Federal Register Volume 81, Number 108 (Monday, June 6, 2016)] [Notices] [Pages 36295-36300] From the Federal Register Online [www.thefederalregister.org] [FR Doc No: 2016-13245] ----------------------------------------------------------------------- DEPARTMENT OF ENERGY Office of Energy Efficiency and Renewable Energy [Case No. WH-002] Notice of Petition for Waiver of HTP, Inc. From the Department of Energy Commercial Water Heater Test Procedure AGENCY: Office of Energy Efficiency and Renewable Energy, Department of Energy. ACTION: Notice of petition for waiver and request for public comments. ----------------------------------------------------------------------- SUMMARY: This notice announces receipt of and publishes a petition for waiver from HTP, Inc. (HTP) seeking an exemption from specified provisions applicable to standby loss of the U.S. Department of Energy (DOE) test procedure for commercial water heating equipment. The waiver request pertains to HTP's specified models of commercial instantaneous water heaters containing 10 gallons or more of water. In its petition, HTP contends that its specified water heater models that employ tube- type heat exchangers and are designed to be flow activated cannot be accurately tested using the currently applicable DOE test procedure. Consequently, HTP seeks to use an alternate test procedure to address certain issues involved in testing the specific basic models identified in its petition. DOE solicits comments, data, and information concerning HTP's petition and its suggested alternate test procedure. DATES: DOE will accept comments, data, and information with respect to the HTP Petition until July 6, 2016. ADDRESSES: You may submit comments, identified by case number WH-002, by any of the following methods:Federal eRulemaking Portal: http://www.regulations.gov. Follow the instructions for submitting comments. Email: [email protected]. Include the case number [Case No. WH-002] in the subject line of the message. Submit electronic comments in WordPerfect, Microsoft Word, PDF, or ASCII file format, and avoid the use of special characters or any form of encryption. Postal Mail: Ms. Brenda Edwards, U.S. Department of Energy, Building Technologies Office, Mailstop EE-5B, Petition for Waiver Case No. WH-002, 1000 Independence Avenue SW., Washington, DC 20585-0121. Telephone: (202) 586-2945. If possible, please submit all items on a compact disc (CD), in which case it is not necessary to include printed copies. Hand Delivery/Courier: Ms. Brenda Edwards, U.S. Department of Energy, Building Technologies Office, 950 L'Enfant Plaza SW., Suite 600, Washington, DC 20024. If possible, please submit all items on a CD, in which case it is not necessary to include printed copies. Docket: The docket, which includes Federal Register notices, comments, and other supporting documents/materials, is available for review at www.regulations.gov. All documents in the docket are listed in the www.regulations.gov index. However, some documents listed in the index, such as those containing information that is exempt from public disclosure, may not be publicly available. For further information on how to submit a comment, or review other public comments and the docket, contact Ms. Brenda Edwards at (202) 586-2945 or by email: [email protected]. FOR FURTHER INFORMATION CONTACT: Mr. Bryan Berringer, U.S. Department of Energy, Building Technologies Office, Mail Stop EE-5B, 1000 Independence Avenue SW., Washington, DC 20585-0121. Telephone: (202) 586-0371. Email: [email protected]. Mr. Eric Stas, U.S. Department of Energy, Office of the General Counsel, GC-33, 1000 Independence Avenue SW., Washington, DC 20585- 0121. Telephone: (202) 586-9507. Email: [email protected]. For information on how to submit or review public comments, contact Ms. Brenda Edwards, U.S. Department of Energy, Office of Energy Efficiency and Renewable Energy, Building Technologies Office, Mailstop EE-5B, 1000 Independence Avenue SW., Washington, DC 20585-0121. Telephone: (202) 586-2945. Email: [email protected]. SUPPLEMENTARY INFORMATION: I. Background and Authority Title III, Part C \1\ of the Energy Policy and Conservation Act of 1975 (EPCA), Public Law 94-163 (42 U.S.C. 6311-6317, as codified), added by Public Law 95-619, established the Energy Conservation Program for Certain Industrial Equipment, which includes commercial water heaters, the focus of this notice.\2\ Part C specifically includes definitions (42 U.S.C. 6311), energy conservation standards (42 U.S.C 6313), test procedures (42 U.S.C. 6314), labeling provisions (42 U.S.C. 6315), and the authority to require information and reports from manufacturers. (42 U.S.C. 6316) With respect to test procedures, Part C authorizes the Secretary of Energy (the Secretary) to prescribe test procedures that are reasonably designed to produce results that measure energy efficiency, energy use, and estimated annual operating costs during a representative average-use cycle, and that are not unduly burdensome to conduct. (42 U.S.C. 6314(a)(2)) EPCA also directs DOE to consider amending the existing test procedure for each type of equipment listed each time the industry test procedure is amended for such equipment. (42 U.S.C. 6314(a)(4)) The test procedure for commercial water heaters is contained in the Code of Federal Regulations (CFR) at 10 CFR part 431, subpart G. --------------------------------------------------------------------------- \1\ For editorial reasons, upon codification in the U.S. Code, Part C was re-designated Part A-1. \2\ All references to EPCA in this document refer to the statute as amended through the Energy Efficiency Improvement Act of 2015 (EEIA 2015), Public Law 114-11 (April 30, 2015). --------------------------------------------------------------------------- DOE's regulations set forth at 10 CFR 431.401 contain provisions that permit a person to seek a waiver from the test procedure requirements for covered equipment if at least one of the following conditions is met: (1) The basic model contains one or more design characteristics that prevent testing according to the prescribed test procedures; or (2) the prescribed test procedures may evaluate the basic model in a manner so unrepresentative of its true energy consumption as to provide materially inaccurate comparative data. 10 CFR 431.401(a)(1). A petitioner must include in its petition any alternate test procedures known to the petitioner to evaluate the basic model in a manner representative of its energy consumption. 10 CFR 431.401(b)(1)(iii). DOE may grant a waiver subject to conditions, including adherence to alternate test procedures. 10 CFR 431.401(f)(2). As soon as practicable after the granting of any waiver, DOE will publish in the Federal Register a notice of proposed rulemaking to amend its regulations so as to eliminate any need for the continuation of such waiver. As soon thereafter as practicable, DOE will publish in the Federal Register a final rule. 10 CFR 431.401(l). II. Petition for Waiver of Test Procedure On February 17, 2015, HTP filed a petition for waiver from the DOE test [[Page 36296]] procedure at 10 CFR 431.106 to measure standby loss of commercial water heating equipment. This petition addresses HTP's specified models of commercial instantaneous water heaters containing 10 gallons or more of water. The current DOE efficiency test procedure for commercial water heaters incorporates by reference the relevant industry test standard for measuring thermal efficiency and standby loss, as specified in American National Standards Institute (ANSI) ANSI Z21.10.3-2011, Gas- Fired Water Heaters, Volume III, Storage Water Heaters, With Input Ratings Above 75,000 Btu Per Hour, Circulating and Instantaneous. In its petition, HTP contends that its identified basic models rely on flow of water through the heater to activate the burner, but because the current DOE test procedure does not take into account such units, it does not provide a proper representation of the standby loss of these models. The current standby loss test procedure is designed to test tank-type water heaters which are thermostatically operated. The models for which HTP is seeking this test procedure waiver employ tube- type heat exchangers and are designed to be flow activated. To address the apparent shortcomings of ANSI Z21.10.3-2011, HTP has submitted to DOE an alternate test procedure for measuring the standby loss of tube- type instantaneous water heaters, as addressed in sections E.1 and E.3 of ANSI Z21.10.3-2012, Gas-Fired Water Heaters, Volume III, Storage Water Heaters, With Input Ratings Above 75,000 Btu Per Hour, Circulating and Instantaneous. HTP believes this alternative provides a representative measure of the standby loss of these models. III. Alternate Test Procedure EPCA requires that manufacturers use DOE test procedures when making representations about the energy consumption and energy consumption costs of products and equipment covered by the statute. (42 U.S.C. 6293(c); 6314(d)) Consistent representations about the energy efficiency of covered products and equipment are important for consumers evaluating products when making purchasing decisions and for manufacturers to demonstrate compliance with applicable DOE energy conservation standards. Pursuant to its regulations applicable to waivers and interim waivers from applicable test procedures at 10 CFR 431.401, DOE will consider setting an alternate test procedure for HTP in a subsequent Decision and Order. HTP has submitted to DOE an alternate test procedure for measuring the standby loss of tube-type instantaneous water heaters as addressed in ANSI Z21.10.3-2012 sections E.1 and E.3. Specifically, HTP has submitted the following alternate test procedure to accurately represent the standby loss of its commercial instantaneous water heaters containing 10 gallons or more of water: Z21.10.3-2012 Exhibit E Efficiency Test Procedures E.1 Method of Test For Measuring Thermal Efficiency A water heater for installation on combustible floors shall be placed on \3/4\ in (1.9 cm) plywood platform supported by three 2 x 4 runners. If the water heater is for installation on noncombustible floors, suitable noncombustible material shall be placed on the platform. When the use of the platform for a large water heater is not practical, the water heater may be placed on any suitable flooring. A wall mounted water heater shall be mounted to a simulated wall section. Placement in the test room shall be in an area protected from drafts. Inlet and outlet piping shall be immediately turned vertically downward from the connections on a tank-type water heater so as to form heat traps. Any factory supplied heat traps shall be installed per the installation instructions. Thermocouples for measuring inlet and outlet water temperatures shall be installed before the inlet heat trap piping and after the outlet heat trap piping. Water-tube water heaters shall be installed as shown in Figure 3, Arrangement for Testing Water-tube Type Instantaneous and Circulating Water Heaters. a. Piping Insulation Insulate the water piping, including heat traps, for a length of 4 ft (1.22 m) from the connection at the appliance with material having a thermal resistance (R) value of not less than 4 [F[middot]ft [middot]hr/Btu (0.7 K[middot]m/W)]. Care should be taken so the insulation does not contact any appliance surface except at the location where the pipe connections penetrate the appliance jacket. b. Temperature and Pressure Relief Valve Insulation If the manufacturer has not provided a temperature and pressure relief valve, one shall be installed and insulated as specified above. c. Vent Requirements 1. Appliance Equipped With Draft Hoods All tests shall be conducted with the natural draft established by the following vent pipe arrangements: A vertically discharging vent connection shall have attached to and vertically above it, 5 ft (1.52 m) of vent pipe the same size as the outlet. If the vent does not discharge vertically, a suitable elbow shall be installed first. 2. Direct Vent Appliances and Mechanically Vented The appliance shall be installed with the venting arrangement specified in the manufacturer's instructions. The water heater shall be installed with the manufacturer's specified minimum venting length venting arrangement. d. Water Supply During conduct of this test, the temperature of the supply water shall be maintained at 70 2 [deg]F (21 1 [deg]C). The pressure of the water supply shall be maintained between 40 psi (275.8 kPa) and the maximum pressure specified by the manufacturer for the appliance under test. The accuracy of the pressure measuring devices shall be 1.0 psi (6.9 kPa). For a water- tube water heater, the inlet water temperature shall be maintained at the supply water temperature or as specified by the manufacturer (see 2.1.8). A tank-type water heater shall be isolated by use of a shutoff valve in the supply line with an expansion tank installed in the supply line downstream of the shutoff valve. There shall be no shutoff means between the expansion tank and the appliance inlet. e. Gas Supply The gas rate shall be adjusted as specified in 2.3.3. The outlet pressure of the gas appliance pressure regulator shall be within 10 percent of that recommended by the manufacturer. The higher heating value of the gas burned shall be obtained. f. Installation of Temperature Sensing Means For tank-type water heaters, six (6) temperature sensing means shall be installed inside the storage tank on the vertical center of each of 6 nonoverlapping sections of approximately equal volume from the top to the bottom of the tank. Each temperature sensing means is to be located as far as possible from any heat source or other irregularity, anodic protective device, or water tank or flue wall. The anodic protective device may [[Page 36297]] be removed in order to install the temperature sensing means and all testing may be carried out with the device removed. If the temperature sensing means cannot be installed as specified above, placement of the temperature sensing means shall be made at the discretion of the testing agency so comparable water temperature measurements may be obtained. A temperature sensing means, shielded against direct radiation and positioned at the vertical midpoint of the water heater at a perpendicular distance of approximately 24 in (610 mm) from the surface of the jacket, shall be installed in the test room. g. Setting Tank Thermostat Before starting testing of a tank-type water heater, the setting of the thermostat shall first be obtained by starting with the water in the system at 70 2 [deg]F (21 1 [deg]C) and noting the maximum mean temperature of the water after the thermostat reduces the gas supply to a minimum. The temperature shall be 140 5 [deg]F (60 3 [deg]C). h. Energy Consumption Instrumentation shall be installed which determines, within 1 percent: 1. The quantity and rate of gas consumed. 2. The quantity of electricity consumed by factory supplied water heater components, and of the test loop recirculating pump, if used. i. Room Ambient Temperature The ambient air temperature of the test room shall be maintained at 75 10 [deg]F (24 5.5 [deg]C), as measured by the test room temperature sensing means described in ``-f'' above. The ambient air temperatures shall be measured at 15 minute intervals during conduct of this test. The room temperature shall not vary more than 7.0 [deg]F ( 4 [deg]C) from the average during the test, temperature readings being taken by means of a recording thermometer at 15 minute intervals and averaged at the end of the test. j. Efficiency Measurement The outlet water temperature shall be adjusted by varying the rate of flow until temperature is constant at 70 2 [deg]F (21 1 [deg]C) above the supply temperature. After the outlet temperature has become constant, as indicated by no variation in excess of 2 [deg]F (1 [deg]C) over a 3 minute period, the outlet water shall be diverted from the waste line to a weighing container. A scale with an error no greater than 1 percent of the total draw shall be used. Water shall be allowed to flow into the weighing container for exactly 30 minutes. The gas consumption and electrical power consumption of factory supplied heater components and of the test loop-recirculating pump, if used, shall be measured for the 30 minute period. At this time, the outlet water shall be diverted back into the waste line, the meter readings noted, and the weight of heater water recorded. Throughout the period of test, supply and outlet water temperatures shall be recorded every minute. The temperature, pressure and heating value of the gas metered and barometric pressure shall be obtained. A water meter with an error no greater than 1 percent of the total draw may be used instead of the scale and weighing container. Thermal efficiency, Et, shall be computed by use of the following formula: E t = (KW ([thgr]2 -[thgr]1 )/[(CF x Q x H) + Ec]) x 100 Where: K = 1.004 Btu per pound mass degree F (4184 J/kg [deg]C), nominal specific heat of water at 105 [deg]F; W = total weight of water heated, lbs. (kg); [thgr]1 = average temperature of supply water, [deg]F ([deg]C); [thgr]2 = average temperature of outlet water, [deg]F ([deg]C); Q = total gas consumed as metered, cu. ft. (m\3\); Cs = correction applied to the heating value H, when it is metered at temperature and/or pressure conditions other than the standard conditions. At which the heating value of gas is specified [normally 30 inches mercury column (101.3 kPa) and 60 [deg]F (15.5 [deg]C)]; H = total heating value of gas, Btu per cu. ft. (MJ/m3 ); and Ec = electrical consumption of the water heater and, when used, the test setup recirculating pump, specified in Btu (kJ). Standby Loss for Tank Type Water Heaters Shall Be Determined Using Appendix E.2 Standby Loss for Tube Type Water Heaters That Contain 10 or More Gallons Within the Water Heater, as Determined Under 5.27, Shall Be Determined Using Appendix E.3 E.3 Method of Test for Measuring Standby Loss for Tube Type Instantaneous Water Heaters With 10 or Greater Gallons of Storage The appliance shall be installed as specified in G.1, Method of Test for Measuring Thermal Efficiency. This test may be conducted immediately following the thermal efficiency test. In this case, start the test after the main burner(s) has shut down and, if applicable, the water pump has shut down. Otherwise, the water heater shall be put into operation under the same test conditions specified in G.1, and the outlet water temperature shall be adjusted by varying the rate of flow until temperature is constant at 702 [deg]F (21 1 [deg]C) above the supply temperature. After the outlet temperatures becomes constant, as indicated by no variation in excess of 2 [deg]F (1 [deg]C) over a 3 minute period, shut down the main burner(s) and, if applicable, wait for the water pump to shut down, and then start the test. At the start of the test, record the time, ambient temperature, outlet water temperature, supply water temperature, and begin measuring the fuel and electric consumption. During the first hour, outlet water temperature, supply water temperature and the ambient air temperature shall be measured at the end of each 5 minute interval. For the remainder of the test, these measurements shall be made at the end of every 15 minute interval. The duration of this test shall be 24 hours. If the main burner is firing at 24 hours, continue the test until the main burner and the water pump, if applicable, have shut down. Immediately after the conclusion of the test, record the total fuel flow and electrical energy consumption, the final ambient air temperature, and the final outlet water temperature. Calculate the average of the ambient air temperatures and the supply water temperatures taken at the end of each time interval, including the initial and final values. The average hourly standby loss, S, rounded to the nearest Btu per hour, shall be determined by the formula: S = [(Cs(Qs)(H) + Ec)/t]-[([Delta]T4)/([Delta]T3)(t)Et ] Where: Cs = correction applied to the heating value of a gas H, when it is metered at temperature and/or pressure conditions other than the standard conditions for which the value of H is based; H = higher heating value of gas, Btu per cu. ft. (MJ/m3); Qs = total fuel flow as metered, cu. ft. (m3); [Delta]T3 = difference between the outlet temperature and the average value of the ambient air temperature, [deg]F ([deg]C); [Delta]T4 = difference between the average supply water temperature and the outlet temperature, [deg]F ([deg]C); t = duration of test, hrs.; Ec = electrical energy consumption expressed in Btu (kJ); and Et = thermal efficiency as determined under G1, Method of Test for Measuring Thermal Efficiency [[Page 36298]] If the main burner(s) does not cycle on during this test, the hourly average standby loss calculation simplifies to: S = {(K(Va)([Delta]T4)/Et) + Ec{time} /t For water heaters that will not initiate or cause actions that will initiate burner operation, the following simplified procedure may be used to measure the hourly standby loss. This test may be conducted immediately following the thermal efficiency test. In this case, start the test after the main burner(s) has shut down and, if applicable, the water pump has shut down. Otherwise provide the electrical connection as specified in G.1., Method of Test for Measuring Thermal Efficiency, and start the test. At the start of the test, record the time and begin measuring the electric consumption for one hour. Record the duration of the test and the total electrical consumption during the test. The average hourly standby loss, S, rounded to the nearest Btu per hour, shall be determined by the formula: S = [(([Delta]T5 k Va / Et)/24) + Ec] Where: [Delta]T5 = 70 [deg]F (38.9 [deg]C), difference between the supply and outlet water temperatures; k = 8.25 Btu/gallon [deg]F (4147.6331 J/l [deg]C), the nominal specific heat of water; Va = water contained in the water heater expressed in gallons (L), as determined under 5.27; Ec = electrical energy consumption expressed in Btu (kJ); and Et = thermal efficiency as determined under G1, Method of Test for Measuring Thermal Efficiency. The following basic models are included in HTP's petition: ModCon1000VWH ModCon1700VWH IV. Summary and Request for Comments Through this notice, DOE announces receipt of and is publishing HTP's petition for waiver from the DOE test procedure for commercial water heaters for its ModCon 1000VWH and ModCon 1700VWH commercial instantaneous water heater models, which contain 10 gallons or more of water. The petition contains no confidential information. The petition includes a suggested alternate test procedure to determine the thermal efficiency and standby loss of HTP's specified basic models of commercial instantaneous water heaters containing 10 gallons or more of water. DOE is considering including this alternate test procedure in its subsequent Decision and Order. DOE solicits comments from interested parties on all aspects of the petition, including the suggested alternate test procedure and calculation methodology. Pursuant to 10 CFR 431.401(d), any person submitting written comments to DOE must also send a copy of such comments to the petitioner. The contact information for the petitioner is: Mr. Aleksandr Kovalenko, Director of Engineering, HTP, Inc., P.O. Box 429, 120 Braley Road, East Freetown, MA 02717. All submissions received must include the agency name and case number for this proceeding. Submit electronic comments in WordPerfect, Microsoft Word, Portable Document Format (PDF), or text (American Standard Code for Information Interchange (ASCII)) file format and avoid the use of special characters or any form of encryption. Wherever possible, include the electronic signature of the author. DOE does not accept telefacsimiles (faxes). Pursuant to 10 CFR 1004.11, any person submitting information that he or she believes to be confidential and exempt by law from public disclosure should submit two copies: One copy of the document marked ``confidential'' with all of the information believed to be confidential included, and one copy of the document marked ``non- confidential'' with all of the information believed to be confidential deleted. DOE will make its own determination about the confidential status of the information and treat it according to its determination. Issued in Washington, DC, on May 31, 2016. Kathleen B. Hogan, Deputy Assistant Secretary for Energy Efficiency, Energy Efficiency and Renewable Energy. HTP Advanced Heating and Hot water Systems P.O. Box 429 120 Braley Road East Freetown, MA 02717 508-763-8071 FAX: 508-763-3769 February 17, 2015 U.S. Department of Energy Building Technologies Program, MS EE-2J Test Procedure Waiver 1000 Independence Avenue SW. Washington, DC 20585-0121 Re: Waiver for Test Procedure for Commercial Water Heating Equipment To Whom It May Concern: Pursuant to the provisions of 10 CFR 431.401, HTP, Inc. is hereby applying for a waiver of the standby loss test procedure of 10 CFR .431.106 for the following basic model(s) of commercial instantaneous water heaters containing 10 gallons or more of water. ModCon1000VWH ModCon1700VWH The current Department of Energy efficiency test procedure for commercial water heaters references the relevant test procedures for measuring thermal efficiency and standby loss specified in the standard, ANSI Z21.10.3-2011. The identified basic model(s) rely on flow of water through the heater to activate the burner. As will be explained below, the current test procedure does not provide a proper representation of the standby loss of these models. The current standby loss test procedure is included as Attachment A. This procedure is designed to test tank-type water heaters which are thermostatically operated. The basic steps of the procedure are to heat the water within the water heater, turn off the burner or element and then measure all the energy consumption that occurs while the water heater is ``standing by'' for approximately 24 hours with no water being withdrawn from it. The key measurement of the test procedure is the energy consumed by the burner or heating element when the thermostat senses that the water in the tank has cooled down to the point where it needs to be reheated. The current test does not address water heaters that have no means to activate the burner or heating element if no heated water is being drawn from the unit, i.e. the standby condition. The models for which HTP, Inc. is seeking this test procedure waiver employ tube type heat exchangers and are designed to be flow activated. That is, the burner does not come on until water flow through the unit is sensed. Under the current standby loss test procedure, the burner on these models will not fire at any time during the test and the resulting standby loss measurement would be nearly zero. That measurement is not representative of the standby loss characteristics of these models. HTP, Inc. believes that the current test procedure evaluates the standby loss of the identified basic model(s) in a manner so unrepresentative of the true energy consumption as to provide materially inaccurate comparative data. The manufacturers of all other basic models marketed in the United States known to HTP, Inc. do incorporate similar design characteristics is included as Attachment B. An alternative procedure for measuring the standby loss of tube type instantaneous water heater is included as Attachment C. HTP, Inc. believes this [[Page 36299]] alternative provides a representative measure of the standby loss of these models. HTP, Inc. requests that DOE grant it a waiver to use this alternative procedure in lieu of the standby loss procedure specified in the current DOE efficiency test procedures for commercial water heaters. Respectfully submitted, Aleksandr Kovalenko Director of Engineering HTP, Inc. Attachment A: [Excerpts from DOE's current commercial water heater regulations at 10 CFR 431.100-110. Not reproduced here.] Attachment B: Manufacturers of Commercial Tube Type Water Heaters containing 10 gallons or more A.O. Smith Corporation 11270 W Park Place PO Box 245008 Milwaukee, WI 53224-3623 Laars Heating Systems Company 20 Industrial Way Rochester, NH 03867-4296 Lochinvar LLC 300 Maddox Simpson Pkwy Lebanon, TN 37090-5366 Thermal Solutions Products, LLC, a Subsidiary of Burnham Holdings PO BOX 3244 Lancaster, PA 17604-3244 Attachment C AHRI Recommended Standby Loss Test Procedure for Commercial Tube- Type Instantaneous Water Heaters and Hot Water Supply Boilers That Contain At Least 10 Gallons of Water Z21.10.3-2012 Exhibit E Efficiency Test Procedures E.1 Method of Test for Measuring Thermal Efficiency A water heater for installation on combustible floors shall be placed on \3/4\ in (1.9 cm) plywood platform supported by three 2 x 4 runners. If the water heater is for installation on noncombustible floors, suitable noncombustible material shall be placed on the platform. When the use of the platform for a large water heater is not practical, the water heater may be placed on any suitable flooring. A wall mounted water heater shall be mounted to a simulated wall section. Placement in the test room shall be in an area protected from drafts. Inlet and outlet piping shall be immediately turned vertically downward from the connections on a tank-type water heater so as to form heat traps. Any factory supplied heat traps shall be installed per the installation instructions. Thermocouples for measuring inlet and outlet water temperatures shall be installed before the inlet heat trap piping and after the outlet heat trap piping. Water-tube water heaters shall be installed as shown in Figure 3, Arrangement for Testing Water-tube Type Instantaneous and Circulating Water Heaters. a. Piping Insulation Insulate the water piping, including heat traps, for a length of 4 ft (1.22 m) from the connection at the appliance with material having a thermal resistance (R) value of not less than 4 [F[middot]ft [middot]hr/Btu (0.7 K[middot]m/W)]. Care should be taken so the insulation does not contact any appliance surface except at the location where the pipe connections penetrate the appliance jacket. b. Temperature and Pressure Relief Valve Insulation If the manufacturer has not provided a temperature and pressure relief valve, one shall be installed and insulated as specified above. c. Vent Requirements 1. Appliance Equipped With Draft Hoods All tests shall be conducted with the natural draft established by the following vent pipe arrangements: A vertically discharging vent connection shall have attached to and vertically above it, 5 ft (1.52 m) of vent pipe the same size as the outlet. If the vent does not discharge vertically, a suitable elbow shall be installed first. 2. Direct Vent Appliances and Mechanically Vented The appliance shall be installed with the venting arrangement specified in the manufacturer's instructions. The water heater shall be installed with the manufacturer's specified minimum venting length venting arrangement. d. Water Supply During conduct of this test, the temperature of the supply water shall be maintained at 70 2[deg]F (21 1[deg]C). The pressure of the water supply shall be maintained between 40 psi (275.8 kPa) and the maximum pressure specified by the manufacturer for the appliance under test. The accuracy of the pressure measuring devices shall be 1.0 psi (6.9 kPa). For a water- tube water heater, the inlet water temperature shall be maintained at the supply water temperature or as specified by the manufacturer (see 2.1.8). A tank-type water heater shall be isolated by use of a shutoff valve in the supply line with an expansion tank installed in the supply line downstream of the shutoff valve. There shall be no shutoff means between the expansion tank and the appliance inlet. e. Gas Supply The gas rate shall be adjusted as specified in 2.3.3. The outlet pressure of the gas appliance pressure regulator shall be within 10 percent of that recommended by the manufacturer. The higher heating value of the gas burned shall be obtained. f. Installation of Temperature Sensing Means For tank-type water heaters, six (6) temperature sensing means shall be installed inside the storage tank on the vertical center of each of 6 nonoverlapping sections of approximately equal volume from the top to the bottom of the tank. Each temperature sensing means is to be located as far as possible from any heat source or other irregularity, anodic protective device, or water tank or flue wall. The anodic protective device may be removed in order to install the temperature sensing means and all testing may be carried out with the device removed. If the temperature sensing means cannot be installed as specified above, placement of the temperature sensing means shall be made at the discretion of the testing agency so comparable water temperature measurements may be obtained. A temperature sensing means, shielded against direct radiation and positioned at the vertical midpoint of the water heater at a perpendicular distance of approximately 24 in (610 mm) from the surface of the jacket, shall be installed in the test room. g. Setting Tank Thermostat Before starting testing of a tank-type water heater, the setting of the thermostat shall first be obtained by starting with the water in the system at 70 2[deg]F (21 1[deg]C) and noting the maximum mean temperature of the water after the thermostat reduces the gas supply to a minimum. The temperature shall be 140 5[deg]F (60 3[deg]C). h. Energy Consumption Instrumentation shall be installed which determines, within 1 percent: 1. The quantity and rate of gas consumed. 2. The quantity of electricity consumed by factory supplied water heater components, and of the test loop recirculating pump, if used. [[Page 36300]] i. Room Ambient Temperature The ambient air temperature of the test room shall be maintained at 75 10[deg]F (24 5.5[deg]C), as measured by the test room temperature sensing means described in ``-f'' above. The ambient air temperatures shall be measured at 15 minute intervals during conduct of this test. The room temperature shall not vary more than 7.0[deg]F ( 4[deg]C) from the average during the test, temperature readings being taken by means of a recording thermometer at 15 minute intervals and averaged at the end of the test. j. Efficiency Measurement The outlet water temperature shall be adjusted by varying the rate of flow until temperature is constant at 70 2[deg]F (21 1[deg]C) above the supply temperature. After the outlet temperature has become constant, as indicated by no variation in excess of 2[deg]F (1[deg]C) over a 3 minute period, the outlet water shall be diverted from the waste line to a weighing container. A scale with an error no greater than 1 percent of the total draw shall be used. Water shall be allowed to flow into the weighing container for exactly 30 minutes. The gas consumption and electrical power consumption of factory supplied heater components and of the test loop-recirculating pump, if used, shall be measured for the 30 minute period. At this time, the outlet water shall be diverted back into the waste line, the meter readings noted, and the weight of heater water recorded. Throughout the period of test, supply and outlet water temperatures shall be recorded every minute. The temperature, pressure and heating value of the gas metered and barometric pressure shall be obtained. A water meter with an error no greater than 1 percent of the total draw may be used instead of the scale and weighing container. Thermal efficiency, Et, shall be computed by use of the following formula: E t = (KW ([thgr]2 - [thgr]1 )/[(CF x Q x H) + Ec]) X 100 Where K = 1.004 Btu per pound mass degree F (4184 J/kg [deg]C), nominal specific heat of water at 105[deg]F; W = total weight of water heated, lbs. (kg); [thgr]1 = average temperature of supply water, [deg]F ([deg]C); [thgr]2 = average temperature of outlet water, [deg]F ([deg]C); Q = total gas consumed as metered, cu. ft. (m\3\); Cs = correction applied to the heating value H, when it is metered at temperature and/or pressure conditions other than the standard conditions. At which the heating value of gas is specified [normally 30 inches mercury column (101.3 kPa) and 60 [deg]F (15.5 [deg]C)]; H = total heating value of gas, Btu per cu. ft. (MJ/m3 ); and Ec = electrical consumption of the water heater and, when used, the test setup recirculating pump, specified in Btu (kJ). Standby Loss for tank type water heaters shall be determined using Appendix E.2 Standby Loss for tube type water heaters that contain 10 or more gallons within the water heater, as determined under 5.27, shall be determined using Appendix E.3 E.3 Method of Test for Measuring Standby Loss for Tube Type Instantaneous Water Heaters With 10 or Greater Gallons of Storage The appliance shall be installed as specified in E.1, Method of Test for Measuring Thermal Efficiency. This test may be conducted immediately following the thermal efficiency test. In this case, start the test after the main burner(s) has shut down and, if applicable, the water pump has shut down. Otherwise the water heater shall be put into operation under the same test conditions specified in E.1 and the outlet water temperature shall be adjusted by varying the rate of flow until temperature is constant at 702[deg]F (21 1[deg]C) above the supply temperature. After the outlet temperatures becomes constant, as indicated by no variation in excess of 2[deg]F (1[deg]C) over a 3 minute period, shut down the main burner(s) and, if applicable, wait for the water pump to shut down, and then start the test. At the start of the test record the time, ambient temperature, outlet water temperature, supply water temperature and begin measuring the fuel and electric consumption. During the first hour, outlet water temperature, supply water temperature and the ambient air temperature shall be measured at the end of each 5 minute interval. For the remainder of the test, these measurements shall be made at the end of every 15 minute interval. The duration of this test shall be 24 hours. If the main burner is firing at 24 hours, continue the test until the main burner and the water pump, if applicable, have shut down. Immediately after the conclusion of the test, record the total fuel flow and electrical energy consumption, the final ambient air temperature and the final outlet water temperature. Calculate the average of the ambient air temperatures and the supply water temperatures taken at the end of each time interval, including the initial and final values. The average hourly standby loss, S, rounded to the nearest Btu per hour, shall be determined by the formula: S = [(Cs(Qs)(H) + Ec)/t]-[([Delta]T 4 )/ ([Delta]T3 )(t)Et ] Where Cs = correction applied to the heating value of a gas H, when it is metered at temperature and/or pressure conditions other than the standard conditions for which the value of H is based; H = higher heating value of gas, Btu per cu. ft. (MJ/m3); Qs = total fuel flow as metered, cu. ft. (m3); [Delta]T3 = difference between the outlet temperature and the average value of the ambient air temperature, [deg]F ([deg]C); [Delta]T4 = difference between the average supply water temperature and the outlet temperature, [deg]F ([deg]C); t = duration of test, hrs.; Ec = electrical energy consumption expressed in Btu (kJ); and Et = thermal efficiency as determined under E.1, Method of Test for Measuring Thermal Efficiency If the main burner(s) does not cycle on during this test the hourly average standby loss calculation simplifies to: S = {(K(Va)([Delta]T4 )/Et ) + Ec {time} /t For water heaters that will not initiate or cause actions that will initiate burner operation, the following simplified procedure may be used to measure the hourly standby loss. This test may be conducted immediately following the thermal efficiency test. In this case, start the test after the main burner(s) has shut down and, if applicable, the water pump has shut down. Otherwise, provide the electrical connection as specified in E.1 Method of Test for Measuring Thermal Efficiency and start the test. At the start of the test record the time and begin measuring the electric consumption for one hour. Record the duration of the test and the total electrical consumption during the test. The average hourly standby loss, S, rounded to the nearest Btu per hour, shall be determined by the formula: S = [(([Delta]T5 k Va /Et )/24) + Ec ] Where: [Delta]T5 = 70[emsp14][deg]F (38.9 [deg]C), difference between the supply and outlet water temperatures; k= 8.25 Btu/gallon [deg]F (4147.6331 J/l[deg] C), the nominal specific heat of water; Va = water contained in the water heater expressed in gallons (L), as determined under 5.27; Ec = electrical energy consumption expressed in Btu (kJ); and Et = thermal efficiency as determined under E.1, Method of Test for Measuring Thermal Efficiency. [FR Doc. 2016-13245 Filed 6-3-16; 8:45 am] BILLING CODE 6450-01-P
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Thermal Efficiency. Washington, DC 20585–0121. this notice.2 Part C specifically includes
[FR Doc. 2016–13252 Filed 6–3–16; 8:45 am] Telephone: (202) 586–2945. If possible, definitions (42 U.S.C. 6311), energy
BILLING CODE 6450–01–P please submit all items on a compact conservation standards (42 U.S.C 6313),
disc (CD), in which case it is not test procedures (42 U.S.C. 6314),
necessary to include printed copies. labeling provisions (42 U.S.C. 6315),
DEPARTMENT OF ENERGY • Hand Delivery/Courier: Ms. Brenda and the authority to require information
Edwards, U.S. Department of Energy, and reports from manufacturers. (42
Office of Energy Efficiency and Building Technologies Office, 950 U.S.C. 6316) With respect to test
Renewable Energy L’Enfant Plaza SW., Suite 600, procedures, Part C authorizes the
[Case No. WH–002] Washington, DC 20024. If possible, Secretary of Energy (the Secretary) to
please submit all items on a CD, in prescribe test procedures that are
Notice of Petition for Waiver of HTP, which case it is not necessary to include reasonably designed to produce results
Inc. From the Department of Energy printed copies. that measure energy efficiency, energy
Commercial Water Heater Test Docket: The docket, which includes use, and estimated annual operating
Procedure Federal Register notices, comments, costs during a representative average-
and other supporting documents/ use cycle, and that are not unduly
AGENCY: Office of Energy Efficiency and
materials, is available for review at burdensome to conduct. (42 U.S.C.
Renewable Energy, Department of
www.regulations.gov. All documents in 6314(a)(2)) EPCA also directs DOE to
Energy.
the docket are listed in the consider amending the existing test
ACTION: Notice of petition for waiver and
www.regulations.gov index. However, procedure for each type of equipment
request for public comments. listed each time the industry test
some documents listed in the index,
SUMMARY: This notice announces receipt such as those containing information procedure is amended for such
of and publishes a petition for waiver that is exempt from public disclosure, equipment. (42 U.S.C. 6314(a)(4)) The
from HTP, Inc. (HTP) seeking an may not be publicly available. test procedure for commercial water
exemption from specified provisions For further information on how to heaters is contained in the Code of
applicable to standby loss of the U.S. submit a comment, or review other Federal Regulations (CFR) at 10 CFR
Department of Energy (DOE) test public comments and the docket, part 431, subpart G.
procedure for commercial water heating contact Ms. Brenda Edwards at (202) DOE’s regulations set forth at 10 CFR
equipment. The waiver request pertains 586–2945 or by email: 431.401 contain provisions that permit
to HTP’s specified models of Brenda.Edwards@ee.doe.gov. a person to seek a waiver from the test
commercial instantaneous water heaters procedure requirements for covered
FOR FURTHER INFORMATION CONTACT: Mr. equipment if at least one of the
containing 10 gallons or more of water.
Bryan Berringer, U.S. Department of following conditions is met: (1) The
In its petition, HTP contends that its
Energy, Building Technologies Office, basic model contains one or more
specified water heater models that
Mail Stop EE–5B, 1000 Independence design characteristics that prevent
employ tube-type heat exchangers and
Avenue SW., Washington, DC 20585– testing according to the prescribed test
are designed to be flow activated cannot
0121. Telephone: (202) 586–0371. procedures; or (2) the prescribed test
be accurately tested using the currently
Email: Bryan.Berringer@ee.doe.gov. procedures may evaluate the basic
applicable DOE test procedure.
Consequently, HTP seeks to use an Mr. Eric Stas, U.S. Department of model in a manner so unrepresentative
alternate test procedure to address Energy, Office of the General Counsel, of its true energy consumption as to
certain issues involved in testing the GC–33, 1000 Independence Avenue provide materially inaccurate
specific basic models identified in its SW., Washington, DC 20585–0121. comparative data. 10 CFR 431.401(a)(1).
petition. DOE solicits comments, data, Telephone: (202) 586–9507. Email: A petitioner must include in its petition
and information concerning HTP’s Eric.Stas@hq.doe.gov. any alternate test procedures known to
petition and its suggested alternate test For information on how to submit or the petitioner to evaluate the basic
procedure. review public comments, contact Ms. model in a manner representative of its
DATES: DOE will accept comments, data, Brenda Edwards, U.S. Department of energy consumption. 10 CFR
and information with respect to the HTP Energy, Office of Energy Efficiency and 431.401(b)(1)(iii). DOE may grant a
Petition until July 6, 2016. Renewable Energy, Building waiver subject to conditions, including
Technologies Office, Mailstop EE–5B, adherence to alternate test procedures.
ADDRESSES: You may submit comments,
1000 Independence Avenue SW., 10 CFR 431.401(f)(2). As soon as
identified by case number WH–002, by
Washington, DC 20585–0121. practicable after the granting of any
any of the following methods:
• Federal eRulemaking Portal: http:// Telephone: (202) 586–2945. Email: waiver, DOE will publish in the Federal
www.regulations.gov. Follow the Brenda.Edwards@ee.doe.gov. Register a notice of proposed
instructions for submitting comments. SUPPLEMENTARY INFORMATION: rulemaking to amend its regulations so
• Email: AS_Waiver_Requests@ as to eliminate any need for the
I. Background and Authority continuation of such waiver. As soon
ee.doe.gov. Include the case number
[Case No. WH–002] in the subject line Title III, Part C 1 of the Energy Policy thereafter as practicable, DOE will
of the message. Submit electronic and Conservation Act of 1975 (EPCA), publish in the Federal Register a final
comments in WordPerfect, Microsoft Public Law 94–163 (42 U.S.C. 6311– rule. 10 CFR 431.401(l).
Word, PDF, or ASCII file format, and 6317, as codified), added by Public Law
sradovich on DSK3TPTVN1PROD with NOTICES
II. Petition for Waiver of Test Procedure
avoid the use of special characters or 95–619, established the Energy
any form of encryption. Conservation Program for Certain On February 17, 2015, HTP filed a
• Postal Mail: Ms. Brenda Edwards, Industrial Equipment, which includes petition for waiver from the DOE test
U.S. Department of Energy, Building commercial water heaters, the focus of 2 All references to EPCA in this document refer
Technologies Office, Mailstop EE–5B, to the statute as amended through the Energy
Petition for Waiver Case No. WH–002, 1 For editorial reasons, upon codification in the Efficiency Improvement Act of 2015 (EEIA 2015),
1000 Independence Avenue SW., U.S. Code, Part C was re-designated Part A–1. Public Law 114–11 (April 30, 2015).
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![36296 Federal Register / Vol. 81, No. 108 / Monday, June 6, 2016 / Notices
procedure at 10 CFR 431.106 to measure HTP has submitted to DOE an c. Vent Requirements
standby loss of commercial water alternate test procedure for measuring 1. Appliance Equipped With Draft
heating equipment. This petition the standby loss of tube-type Hoods
addresses HTP’s specified models of instantaneous water heaters as
commercial instantaneous water heaters addressed in ANSI Z21.10.3–2012 All tests shall be conducted with the
containing 10 gallons or more of water. sections E.1 and E.3. Specifically, HTP natural draft established by the
The current DOE efficiency test has submitted the following alternate following vent pipe arrangements:
procedure for commercial water heaters test procedure to accurately represent A vertically discharging vent
incorporates by reference the relevant the standby loss of its commercial connection shall have attached to and
industry test standard for measuring instantaneous water heaters containing vertically above it, 5 ft (1.52 m) of vent
thermal efficiency and standby loss, as 10 gallons or more of water: pipe the same size as the outlet. If the
specified in American National vent does not discharge vertically, a
Standards Institute (ANSI) ANSI Z21.10.3–2012 Exhibit E Efficiency suitable elbow shall be installed first.
Z21.10.3–2011, Gas-Fired Water Test Procedures
2. Direct Vent Appliances and
Heaters, Volume III, Storage Water E.1 Method of Test For Measuring Mechanically Vented
Heaters, With Input Ratings Above Thermal Efficiency
75,000 Btu Per Hour, Circulating and The appliance shall be installed with
Instantaneous. In its petition, HTP A water heater for installation on the venting arrangement specified in the
contends that its identified basic models combustible floors shall be placed on manufacturer’s instructions. The water
rely on flow of water through the heater 3⁄4 in (1.9 cm) plywood platform heater shall be installed with the
to activate the burner, but because the supported by three 2 × 4 runners. If the manufacturer’s specified minimum
current DOE test procedure does not water heater is for installation on venting length venting arrangement.
take into account such units, it does not noncombustible floors, suitable d. Water Supply
provide a proper representation of the noncombustible material shall be placed
standby loss of these models. The on the platform. When the use of the During conduct of this test, the
current standby loss test procedure is platform for a large water heater is not temperature of the supply water shall be
designed to test tank-type water heaters practical, the water heater may be maintained at 70 ± 2 °F (21 ± 1 °C). The
which are thermostatically operated. placed on any suitable flooring. A wall pressure of the water supply shall be
The models for which HTP is seeking mounted water heater shall be mounted maintained between 40 psi (275.8 kPa)
this test procedure waiver employ tube- to a simulated wall section. and the maximum pressure specified by
type heat exchangers and are designed the manufacturer for the appliance
Placement in the test room shall be in under test. The accuracy of the pressure
to be flow activated. To address the an area protected from drafts.
apparent shortcomings of ANSI measuring devices shall be ±1.0 psi (6.9
Z21.10.3–2011, HTP has submitted to Inlet and outlet piping shall be kPa). For a water-tube water heater, the
DOE an alternate test procedure for immediately turned vertically inlet water temperature shall be
measuring the standby loss of tube-type downward from the connections on a maintained at the supply water
instantaneous water heaters, as tank-type water heater so as to form heat temperature or as specified by the
addressed in sections E.1 and E.3 of traps. Any factory supplied heat traps manufacturer (see 2.1.8).
ANSI Z21.10.3–2012, Gas-Fired Water shall be installed per the installation A tank-type water heater shall be
Heaters, Volume III, Storage Water instructions. Thermocouples for isolated by use of a shutoff valve in the
Heaters, With Input Ratings Above measuring inlet and outlet water supply line with an expansion tank
75,000 Btu Per Hour, Circulating and temperatures shall be installed before installed in the supply line downstream
Instantaneous. HTP believes this the inlet heat trap piping and after the of the shutoff valve. There shall be no
alternative provides a representative outlet heat trap piping. shutoff means between the expansion
measure of the standby loss of these Water-tube water heaters shall be tank and the appliance inlet.
models. installed as shown in Figure 3, e. Gas Supply
III. Alternate Test Procedure Arrangement for Testing Water-tube
Type Instantaneous and Circulating The gas rate shall be adjusted as
EPCA requires that manufacturers use Water Heaters. specified in 2.3.3. The outlet pressure of
DOE test procedures when making the gas appliance pressure regulator
representations about the energy a. Piping Insulation shall be within ± 10 percent of that
consumption and energy consumption recommended by the manufacturer. The
costs of products and equipment Insulate the water piping, including higher heating value of the gas burned
covered by the statute. (42 U.S.C. heat traps, for a length of 4 ft (1.22 m) shall be obtained.
6293(c); 6314(d)) Consistent from the connection at the appliance
with material having a thermal f. Installation of Temperature Sensing
representations about the energy
resistance (R) value of not less than 4 Means
efficiency of covered products and
equipment are important for consumers [F·ft ·hr/Btu (0.7 K·m/W)]. Care should For tank-type water heaters, six (6)
evaluating products when making be taken so the insulation does not temperature sensing means shall be
purchasing decisions and for contact any appliance surface except at installed inside the storage tank on the
manufacturers to demonstrate the location where the pipe connections vertical center of each of 6
compliance with applicable DOE energy penetrate the appliance jacket. nonoverlapping sections of
sradovich on DSK3TPTVN1PROD with NOTICES
conservation standards. Pursuant to its b. Temperature and Pressure Relief approximately equal volume from the
regulations applicable to waivers and Valve Insulation top to the bottom of the tank. Each
interim waivers from applicable test temperature sensing means is to be
procedures at 10 CFR 431.401, DOE will If the manufacturer has not provided located as far as possible from any heat
consider setting an alternate test a temperature and pressure relief valve, source or other irregularity, anodic
procedure for HTP in a subsequent one shall be installed and insulated as protective device, or water tank or flue
Decision and Order. specified above. wall. The anodic protective device may
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![Federal Register / Vol. 81, No. 108 / Monday, June 6, 2016 / Notices 36297
be removed in order to install the percent of the total draw shall be used. burner(s) has shut down and, if
temperature sensing means and all Water shall be allowed to flow into the applicable, the water pump has shut
testing may be carried out with the weighing container for exactly 30 down. Otherwise, the water heater shall
device removed. minutes. The gas consumption and be put into operation under the same
If the temperature sensing means electrical power consumption of factory test conditions specified in G.1, and the
cannot be installed as specified above, supplied heater components and of the outlet water temperature shall be
placement of the temperature sensing test loop-recirculating pump, if used, adjusted by varying the rate of flow
means shall be made at the discretion of shall be measured for the 30 minute until temperature is constant at 70 ± 2
the testing agency so comparable water period. At this time, the outlet water °F (21 ± 1 °C) above the supply
temperature measurements may be shall be diverted back into the waste temperature. After the outlet
obtained. line, the meter readings noted, and the temperatures becomes constant, as
A temperature sensing means, weight of heater water recorded. indicated by no variation in excess of 2
shielded against direct radiation and Throughout the period of test, supply °F (1 °C) over a 3 minute period, shut
positioned at the vertical midpoint of and outlet water temperatures shall be down the main burner(s) and, if
the water heater at a perpendicular recorded every minute. The applicable, wait for the water pump to
distance of approximately 24 in (610 temperature, pressure and heating value shut down, and then start the test.
mm) from the surface of the jacket, shall of the gas metered and barometric At the start of the test, record the
be installed in the test room. pressure shall be obtained. time, ambient temperature, outlet water
A water meter with an error no greater temperature, supply water temperature,
g. Setting Tank Thermostat
than 1 percent of the total draw may be and begin measuring the fuel and
Before starting testing of a tank-type used instead of the scale and weighing electric consumption.
water heater, the setting of the container. During the first hour, outlet water
thermostat shall first be obtained by Thermal efficiency, Et, shall be temperature, supply water temperature
starting with the water in the system at computed by use of the following and the ambient air temperature shall be
70 ± 2 °F (21 ± 1 °C) and noting the formula: measured at the end of each 5 minute
maximum mean temperature of the Et = (KW (q2¥q1)/[(CF × Q × H) + Ec]) interval. For the remainder of the test,
water after the thermostat reduces the × 100 these measurements shall be made at
gas supply to a minimum. The Where: the end of every 15 minute interval. The
temperature shall be 140 ± 5 °F (60 ± 3
K = 1.004 Btu per pound mass degree F (4184 duration of this test shall be 24 hours.
°C). J/kg °C), nominal specific heat of water If the main burner is firing at 24 hours,
h. Energy Consumption at 105 °F; continue the test until the main burner
W = total weight of water heated, lbs. (kg); and the water pump, if applicable, have
Instrumentation shall be installed q1 = average temperature of supply water, °F
which determines, within ± 1 percent: shut down.
(°C);
1. The quantity and rate of gas q2 = average temperature of outlet water, °F Immediately after the conclusion of
consumed. (°C); the test, record the total fuel flow and
2. The quantity of electricity Q = total gas consumed as metered, cu. ft. electrical energy consumption, the final
consumed by factory supplied water (m3); ambient air temperature, and the final
heater components, and of the test loop Cs = correction applied to the heating value outlet water temperature.
recirculating pump, if used. H, when it is metered at temperature Calculate the average of the ambient
and/or pressure conditions other than
air temperatures and the supply water
i. Room Ambient Temperature the standard conditions. At which the
heating value of gas is specified temperatures taken at the end of each
The ambient air temperature of the [normally 30 inches mercury column time interval, including the initial and
test room shall be maintained at 75 ± 10 (101.3 kPa) and 60 °F (15.5 °C)]; final values.
°F (24 ± 5.5 °C), as measured by the test H = total heating value of gas, Btu per cu. ft. The average hourly standby loss, S,
room temperature sensing means (MJ/m3); and rounded to the nearest Btu per hour,
described in ‘‘-f’’ above. Ec = electrical consumption of the water shall be determined by the formula:
The ambient air temperatures shall be heater and, when used, the test setup
measured at 15 minute intervals during recirculating pump, specified in Btu (kJ). S = [(Cs(Qs)(H) + Ec)/t]¥[(DT4)/
conduct of this test. The room (DT3)(t)Et ]
temperature shall not vary more than ± Standby Loss for Tank Type Water Where:
7.0 °F (± 4 °C) from the average during Heaters Shall Be Determined Using Cs = correction applied to the heating value
the test, temperature readings being Appendix E.2 of a gas H, when it is metered at
temperature and/or pressure conditions
taken by means of a recording Standby Loss for Tube Type Water other than the standard conditions for
thermometer at 15 minute intervals and Heaters That Contain 10 or More which the value of H is based;
averaged at the end of the test. Gallons Within the Water Heater, as H = higher heating value of gas, Btu per cu.
j. Efficiency Measurement Determined Under 5.27, Shall Be ft. (MJ/m3);
Determined Using Appendix E.3 Qs = total fuel flow as metered, cu. ft. (m3);
The outlet water temperature shall be DT3 = difference between the outlet
adjusted by varying the rate of flow E.3 Method of Test for Measuring temperature and the average value of the
until temperature is constant at 70 ± 2 Standby Loss for Tube Type ambient air temperature, °F (°C);
°F (21 ± 1 °C) above the supply Instantaneous Water Heaters With 10 or DT4 = difference between the average supply
sradovich on DSK3TPTVN1PROD with NOTICES
temperature. After the outlet Greater Gallons of Storage water temperature and the outlet
temperature has become constant, as The appliance shall be installed as temperature, °F (°C);
t = duration of test, hrs.;
indicated by no variation in excess of 2 specified in G.1, Method of Test for Ec = electrical energy consumption expressed
°F (1 °C) over a 3 minute period, the Measuring Thermal Efficiency. This test in Btu (kJ); and
outlet water shall be diverted from the may be conducted immediately Et = thermal efficiency as determined under
waste line to a weighing container. A following the thermal efficiency test. In G1, Method of Test for Measuring
scale with an error no greater than 1 this case, start the test after the main Thermal Efficiency
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If the main burner(s) does not cycle petition, including the suggested instantaneous water heaters containing
on during this test, the hourly average alternate test procedure and calculation 10 gallons or more of water.
standby loss calculation simplifies to: methodology. Pursuant to 10 CFR ModCon1000VWH
S = {(K(Va)(DT4)/Et) + Ec}/t 431.401(d), any person submitting ModCon1700VWH
For water heaters that will not initiate written comments to DOE must also The current Department of Energy
or cause actions that will initiate burner send a copy of such comments to the efficiency test procedure for commercial
operation, the following simplified petitioner. The contact information for water heaters references the relevant test
procedure may be used to measure the the petitioner is: Mr. Aleksandr procedures for measuring thermal
hourly standby loss. Kovalenko, Director of Engineering, efficiency and standby loss specified in
This test may be conducted HTP, Inc., P.O. Box 429, 120 Braley the standard, ANSI Z21.10.3–2011. The
immediately following the thermal Road, East Freetown, MA 02717. All identified basic model(s) rely on flow of
efficiency test. In this case, start the test submissions received must include the water through the heater to activate the
after the main burner(s) has shut down agency name and case number for this burner. As will be explained below, the
and, if applicable, the water pump has proceeding. Submit electronic current test procedure does not provide
shut down. Otherwise provide the comments in WordPerfect, Microsoft a proper representation of the standby
electrical connection as specified in Word, Portable Document Format (PDF), loss of these models.
G.1., Method of Test for Measuring or text (American Standard Code for The current standby loss test
Thermal Efficiency, and start the test. Information Interchange (ASCII)) file procedure is included as Attachment A.
At the start of the test, record the time format and avoid the use of special This procedure is designed to test tank-
and begin measuring the electric characters or any form of encryption. type water heaters which are
consumption for one hour. Wherever possible, include the thermostatically operated. The basic
Record the duration of the test and the electronic signature of the author. DOE steps of the procedure are to heat the
total electrical consumption during the does not accept telefacsimiles (faxes). water within the water heater, turn off
test. Pursuant to 10 CFR 1004.11, any the burner or element and then measure
The average hourly standby loss, S, person submitting information that he all the energy consumption that occurs
rounded to the nearest Btu per hour, or she believes to be confidential and while the water heater is ‘‘standing by’’
shall be determined by the formula: exempt by law from public disclosure for approximately 24 hours with no
should submit two copies: One copy of water being withdrawn from it. The key
S = [((DT5 k Va / Et)/24) + Ec] the document marked ‘‘confidential’’
Where:
measurement of the test procedure is the
with all of the information believed to energy consumed by the burner or
DT5 = 70 °F (38.9 °C), difference between the be confidential included, and one copy
supply and outlet water temperatures;
heating element when the thermostat
of the document marked ‘‘non- senses that the water in the tank has
k = 8.25 Btu/gallon °F (4147.6331 J/l °C), the confidential’’ with all of the information
nominal specific heat of water; cooled down to the point where it needs
Va = water contained in the water heater
believed to be confidential deleted. DOE to be reheated. The current test does not
expressed in gallons (L), as determined will make its own determination about address water heaters that have no
under 5.27; the confidential status of the means to activate the burner or heating
Ec = electrical energy consumption expressed information and treat it according to its element if no heated water is being
in Btu (kJ); and determination. drawn from the unit, i.e. the standby
Et = thermal efficiency as determined under Issued in Washington, DC, on May 31, condition.
G1, Method of Test for Measuring 2016. The models for which HTP, Inc. is
Thermal Efficiency.
Kathleen B. Hogan, seeking this test procedure waiver
The following basic models are Deputy Assistant Secretary for Energy employ tube type heat exchangers and
included in HTP’s petition: Efficiency, Energy Efficiency and Renewable are designed to be flow activated. That
ModCon1000VWH Energy. is, the burner does not come on until
ModCon1700VWH HTP water flow through the unit is sensed.
Advanced Heating and Hot water Under the current standby loss test
IV. Summary and Request for procedure, the burner on these models
Comments Systems
P.O. Box 429 will not fire at any time during the test
Through this notice, DOE announces 120 Braley Road and the resulting standby loss
receipt of and is publishing HTP’s East Freetown, MA 02717 measurement would be nearly zero.
petition for waiver from the DOE test 508–763–8071 That measurement is not representative
procedure for commercial water heaters FAX: 508–763–3769 of the standby loss characteristics of
for its ModCon 1000VWH and ModCon February 17, 2015 these models. HTP, Inc. believes that the
1700VWH commercial instantaneous current test procedure evaluates the
U.S. Department of Energy
water heater models, which contain 10 standby loss of the identified basic
Building Technologies Program, MS EE–
gallons or more of water. The petition model(s) in a manner so
2J
contains no confidential information. unrepresentative of the true energy
Test Procedure Waiver
The petition includes a suggested consumption as to provide materially
1000 Independence Avenue SW.
alternate test procedure to determine the inaccurate comparative data.
Washington, DC 20585–0121
thermal efficiency and standby loss of The manufacturers of all other basic
HTP’s specified basic models of Re: Waiver for Test Procedure for models marketed in the United States
sradovich on DSK3TPTVN1PROD with NOTICES
commercial instantaneous water heaters Commercial Water Heating Equipment known to HTP, Inc. do incorporate
containing 10 gallons or more of water. To Whom It May Concern: similar design characteristics is
DOE is considering including this Pursuant to the provisions of 10 CFR included as Attachment B.
alternate test procedure in its 431.401, HTP, Inc. is hereby applying An alternative procedure for
subsequent Decision and Order. for a waiver of the standby loss test measuring the standby loss of tube type
DOE solicits comments from procedure of 10 CFR .431.106 for the instantaneous water heater is included
interested parties on all aspects of the following basic model(s) of commercial as Attachment C. HTP, Inc. believes this
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![Federal Register / Vol. 81, No. 108 / Monday, June 6, 2016 / Notices 36299
alternative provides a representative instructions. Thermocouples for installed in the supply line downstream
measure of the standby loss of these measuring inlet and outlet water of the shutoff valve. There shall be no
models. HTP, Inc. requests that DOE temperatures shall be installed before shutoff means between the expansion
grant it a waiver to use this alternative the inlet heat trap piping and after the tank and the appliance inlet.
procedure in lieu of the standby loss outlet heat trap piping.
e. Gas Supply
procedure specified in the current DOE Water-tube water heaters shall be
efficiency test procedures for installed as shown in Figure 3, The gas rate shall be adjusted as
commercial water heaters. Arrangement for Testing Water-tube specified in 2.3.3. The outlet pressure of
Respectfully submitted, Type Instantaneous and Circulating the gas appliance pressure regulator
Aleksandr Kovalenko Water Heaters. shall be within ± 10 percent of that
Director of Engineering recommended by the manufacturer. The
a. Piping Insulation
HTP, Inc. higher heating value of the gas burned
Insulate the water piping, including shall be obtained.
Attachment A: [Excerpts from DOE’s heat traps, for a length of 4 ft (1.22 m)
current commercial water heater from the connection at the appliance f. Installation of Temperature Sensing
regulations at 10 CFR 431.100–110. Not with material having a thermal Means
reproduced here.] resistance (R) value of not less than 4 For tank-type water heaters, six (6)
Attachment B: [F·ft ·hr/Btu (0.7 K·m/W)]. Care should temperature sensing means shall be
Manufacturers of Commercial Tube be taken so the insulation does not installed inside the storage tank on the
Type Water Heaters containing 10 contact any appliance surface except at vertical center of each of 6
gallons or more the location where the pipe connections nonoverlapping sections of
A.O. Smith Corporation penetrate the appliance jacket. approximately equal volume from the
11270 W Park Place b. Temperature and Pressure Relief top to the bottom of the tank. Each
PO Box 245008 Valve Insulation temperature sensing means is to be
Milwaukee, WI 53224–3623 located as far as possible from any heat
If the manufacturer has not provided source or other irregularity, anodic
Laars Heating Systems Company
a temperature and pressure relief valve, protective device, or water tank or flue
20 Industrial Way
Rochester, NH 03867–4296 one shall be installed and insulated as wall. The anodic protective device may
specified above. be removed in order to install the
Lochinvar LLC
300 Maddox Simpson Pkwy c. Vent Requirements temperature sensing means and all
Lebanon, TN 37090–5366 testing may be carried out with the
1. Appliance Equipped With Draft device removed.
Thermal Solutions Products, LLC, a Hoods
Subsidiary of Burnham Holdings If the temperature sensing means
All tests shall be conducted with the
PO BOX 3244 cannot be installed as specified above,
natural draft established by the
Lancaster, PA 17604–3244 placement of the temperature sensing
following vent pipe arrangements:
A vertically discharging vent means shall be made at the discretion of
Attachment C the testing agency so comparable water
AHRI Recommended Standby Loss connection shall have attached to and
vertically above it, 5 ft (1.52 m) of vent temperature measurements may be
Test Procedure for Commercial Tube- obtained.
Type Instantaneous Water Heaters and pipe the same size as the outlet. If the
vent does not discharge vertically, a A temperature sensing means,
Hot Water Supply Boilers That Contain shielded against direct radiation and
At Least 10 Gallons of Water suitable elbow shall be installed first.
2. Direct Vent Appliances and positioned at the vertical midpoint of
Z21.10.3–2012 Exhibit E Efficiency Mechanically Vented the water heater at a perpendicular
Test Procedures The appliance shall be installed with distance of approximately 24 in (610
the venting arrangement specified in the mm) from the surface of the jacket, shall
E.1 Method of Test for Measuring be installed in the test room.
manufacturer’s instructions. The water
Thermal Efficiency
heater shall be installed with the g. Setting Tank Thermostat
A water heater for installation on manufacturer’s specified minimum
combustible floors shall be placed on 3⁄4 venting length venting arrangement. Before starting testing of a tank-type
in (1.9 cm) plywood platform supported water heater, the setting of the
by three 2 x 4 runners. If the water d. Water Supply thermostat shall first be obtained by
heater is for installation on During conduct of this test, the starting with the water in the system at
noncombustible floors, suitable temperature of the supply water shall be 70 ± 2°F (21 ± 1°C) and noting the
noncombustible material shall be placed maintained at 70 ± 2°F (21 ± 1°C). The maximum mean temperature of the
on the platform. When the use of the pressure of the water supply shall be water after the thermostat reduces the
platform for a large water heater is not maintained between 40 psi (275.8 kPa) gas supply to a minimum. The
practical, the water heater may be and the maximum pressure specified by temperature shall be 140 ± 5°F (60 ±
placed on any suitable flooring. A wall the manufacturer for the appliance 3°C).
mounted water heater shall be mounted under test. The accuracy of the pressure h. Energy Consumption
to a simulated wall section. measuring devices shall be ±1.0 psi (6.9
Placement in the test room shall be in kPa). For a water-tube water heater, the Instrumentation shall be installed
sradovich on DSK3TPTVN1PROD with NOTICES
an area protected from drafts. inlet water temperature shall be which determines, within ± 1 percent:
Inlet and outlet piping shall be maintained at the supply water 1. The quantity and rate of gas
immediately turned vertically temperature or as specified by the consumed.
downward from the connections on a manufacturer (see 2.1.8). 2. The quantity of electricity
tank-type water heater so as to form heat A tank-type water heater shall be consumed by factory supplied water
traps. Any factory supplied heat traps isolated by use of a shutoff valve in the heater components, and of the test loop
shall be installed per the installation supply line with an expansion tank recirculating pump, if used.
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![36300 Federal Register / Vol. 81, No. 108 / Monday, June 6, 2016 / Notices
i. Room Ambient Temperature heating value of gas is specified The average hourly standby loss, S,
[normally 30 inches mercury column rounded to the nearest Btu per hour,
The ambient air temperature of the (101.3 kPa) and 60 °F (15.5 °C)];
test room shall be maintained at 75 ± shall be determined by the formula:
H = total heating value of gas, Btu per cu. ft.
10°F (24 ± 5.5°C), as measured by the (MJ/m3); and S = [(Cs(Qs)(H) + Ec)/t]¥[(DT4)/
test room temperature sensing means Ec = electrical consumption of the water (DT3)(t)Et]
described in ‘‘¥f’’ above. heater and, when used, the test setup Where
The ambient air temperatures shall be recirculating pump, specified in Btu (kJ).
Cs = correction applied to the heating value
measured at 15 minute intervals during Standby Loss for tank type water heaters of a gas H, when it is metered at
conduct of this test. The room shall be determined using Appendix E.2 temperature and/or pressure conditions
temperature shall not vary more than ± other than the standard conditions for
7.0°F (± 4°C) from the average during Standby Loss for tube type water heaters which the value of H is based;
the test, temperature readings being that contain 10 or more gallons within H = higher heating value of gas, Btu per cu.
taken by means of a recording the water heater, as determined under ft. (MJ/m3);
thermometer at 15 minute intervals and 5.27, shall be determined using Qs = total fuel flow as metered, cu. ft. (m3);
Appendix E.3 DT3 = difference between the outlet
averaged at the end of the test.
temperature and the average value of the
j. Efficiency Measurement E.3 Method of Test for Measuring ambient air temperature, °F (°C);
Standby Loss for Tube Type DT4 = difference between the average supply
The outlet water temperature shall be Instantaneous Water Heaters With 10 or water temperature and the outlet
adjusted by varying the rate of flow Greater Gallons of Storage temperature, °F (°C);
until temperature is constant at 70 ± 2°F t = duration of test, hrs.;
(21 ± 1°C) above the supply The appliance shall be installed as
Ec = electrical energy consumption expressed
temperature. After the outlet specified in E.1, Method of Test for in Btu (kJ); and
temperature has become constant, as Measuring Thermal Efficiency. This test Et = thermal efficiency as determined under
indicated by no variation in excess of may be conducted immediately E.1, Method of Test for Measuring
2°F (1°C) over a 3 minute period, the following the thermal efficiency test. In Thermal Efficiency
outlet water shall be diverted from the this case, start the test after the main
burner(s) has shut down and, if If the main burner(s) does not cycle
waste line to a weighing container. A on during this test the hourly average
applicable, the water pump has shut
scale with an error no greater than 1 standby loss calculation simplifies to:
down. Otherwise the water heater shall
percent of the total draw shall be used.
Water shall be allowed to flow into the
be put into operation under the same S = {(K(Va)(DT4)/Et) + Ec}/t
test conditions specified in E.1 and the
weighing container for exactly 30 For water heaters that will not initiate
outlet water temperature shall be
minutes. The gas consumption and or cause actions that will initiate burner
adjusted by varying the rate of flow
electrical power consumption of factory operation, the following simplified
until temperature is constant at 70 ± 2°F
supplied heater components and of the procedure may be used to measure the
(21 ± 1°C) above the supply
test loop-recirculating pump, if used, hourly standby loss.
temperature. After the outlet
shall be measured for the 30 minute This test may be conducted
temperatures becomes constant, as
period. At this time, the outlet water immediately following the thermal
indicated by no variation in excess of
shall be diverted back into the waste efficiency test. In this case, start the test
2°F (1°C) over a 3 minute period, shut
line, the meter readings noted, and the after the main burner(s) has shut down
down the main burner(s) and, if
weight of heater water recorded. and, if applicable, the water pump has
applicable, wait for the water pump to
Throughout the period of test, supply shut down. Otherwise, provide the
shut down, and then start the test.
and outlet water temperatures shall be At the start of the test record the time, electrical connection as specified in E.1
recorded every minute. The ambient temperature, outlet water Method of Test for Measuring Thermal
temperature, pressure and heating value temperature, supply water temperature Efficiency and start the test.
of the gas metered and barometric and begin measuring the fuel and At the start of the test record the time
pressure shall be obtained. electric consumption. and begin measuring the electric
A water meter with an error no greater During the first hour, outlet water consumption for one hour. Record the
than 1 percent of the total draw may be temperature, supply water temperature duration of the test and the total
used instead of the scale and weighing and the ambient air temperature shall be electrical consumption during the test.
container. measured at the end of each 5 minute
Thermal efficiency, Et, shall be The average hourly standby loss, S,
interval. For the remainder of the test, rounded to the nearest Btu per hour,
computed by use of the following
these measurements shall be made at shall be determined by the formula:
formula:
the end of every 15 minute interval. The
Et = (KW (q2 ¥ q1)/[(CF x Q x H) + Ec]) duration of this test shall be 24 hours. S = [((DT5 k Va/Et)/24) + Ec]
X 100 If the main burner is firing at 24 hours, Where:
Where
continue the test until the main burner DT5 = 70 °F (38.9 °C), difference between the
K = 1.004 Btu per pound mass degree F (4184
and the water pump, if applicable, have supply and outlet water temperatures;
J/kg °C), nominal specific heat of water
shut down. k= 8.25 Btu/gallon °F (4147.6331 J/l° C), the
at 105°F;
W = total weight of water heated, lbs. (kg); Immediately after the conclusion of nominal specific heat of water;
q1 = average temperature of supply water, °F the test, record the total fuel flow and Va = water contained in the water heater
(°C); expressed in gallons (L), as determined
electrical energy consumption, the final
sradovich on DSK3TPTVN1PROD with NOTICES
q2 = average temperature of outlet water, °F under 5.27;
ambient air temperature and the final Ec = electrical energy consumption expressed
(°C); outlet water temperature.
Q = total gas consumed as metered, cu. ft. in Btu (kJ); and
Calculate the average of the ambient Et = thermal efficiency as determined under
(m3);
Cs = correction applied to the heating value air temperatures and the supply water E.1, Method of Test for Measuring
H, when it is metered at temperature temperatures taken at the end of each Thermal Efficiency.
and/or pressure conditions other than time interval, including the initial and [FR Doc. 2016–13245 Filed 6–3–16; 8:45 am]
the standard conditions. At which the final values. BILLING CODE 6450–01–P
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Document Created: 2016-06-04 00:17:06
Document Modified: 2016-06-04 00:17:06
| Category | Regulatory Information | |
| Collection | Federal Register | |
| sudoc Class | AE 2.7: GS 4.107: AE 2.106: | |
| Publisher | Office of the Federal Register, National Archives and Records Administration | |
| Section | Notices | |
| Action | Notice of petition for waiver and request for public comments. | |
| Dates | DOE will accept comments, data, and information with respect to the HTP Petition until July 6, 2016. | |
| Contact | Mr. Bryan Berringer, U.S. Department of Energy, Building Technologies Office, Mail Stop EE-5B, 1000 Independence Avenue SW., Washington, DC 20585-0121. Telephone: (202) 586-0371. Email: [email protected] | |
| FR Citation | 81 FR 36295 |
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