Pmin power consumption, in watts, measured with the television set power switch off and the vacation switch and remote control defeat switch in the lowest energy consuming position. 3.0 Average Annual Energy Consumption E=(Poto/1,000)+(Psts/1,000)=2.2P,+6.56P where E total average energy consumed by the television set (kilowatt-hour per year) P.=operating power consumption as computed in 2.3.3 to = operating time, 2,200 h/yr P1 = standby power consumption computed in 2.4 ts standby time, 6,560 h/yr [42 FR 46154, Sept. 14, 1977. Redesignated and amended at 44 FR 37938, June 29, 1979] APPENDIX I TO SUBPART B OF PART MICROWAVE/CONVEN 1. DEFINITIONS 1.1 "Built-in" means the product is supported by surrounding cabinetry, walls, or other similar structures. 1.2 "Drop-in" means the product is supported by horizontal surface cabinetry. 1.3 "Forced convection" means a mode of conventional oven operation in which a fan is used to circulate the heated air within the oven compartment during cooking. 1.4 "Freestanding" means the product is not supported by surrounding cabinetry, walls, or other similar structures. 1.5 "Normal nonoperating temperature" means the temperature of all areas of an of an appliance to be tested that is within 5 degrees of the temperature that the identical areas of the same basic model of the appliance would attain if it remained in the test room for 24 hours while not operating with all oven doors closed and with any gas pilot lights on and adjusted in accordance with manufacturer's instructions. 1.6 "Primary energy consumption" means either the electrical energy consumption of a conventional electric oven or the gas energy consumption of a conventional gas oven. 1.7 "Secondary energy consumption" means any electrical energy consumption, other than clock energy consumption, of a conventional gas oven. 1.8 "Standard cubic foot of gas" means that quantity of gas that occupies 1 cubic foot when saturated with water vapor at a temperature of 60° F and a pressure of 30 inches of mercury (density of mercury equals 13.595 grams per cubic centimeter). 1.9 "Thermocouple" means a device consisting of two dissimilar metals which are joined together and, with their associated wires, are used to measure temperature by means of electromotive force. 2. TEST CONDITIONS 2.1 Installation. A free standing applicance shall be installed with the back directly against, or as near as possible to, a vertical wall which extends at least 1 foot above and on either side of the appliance. There shall be no side walls. A drop-in, built-in or wall-mounted applicance shall be installed in an enclosure in accordance with the manufacturer's instructions. These appliances are to be completely assembled with all handles, knobs, guards and the like mounted in place. Any electric resistance heaters, gas burners, baking racks, and baffles shall be in place in accordance with the manufacturer's instructions; however, broiler pans are to be removed from the oven's baking compartment. Disconnect any electrical clock which uses energy continuously. Do not disconnect or modify the circuit to any other electrical devices or features, except as indicated in 2.1.3. 2.1.1 Conventional electric ranges, ovens and cooking tops and microwave/conventional electric ranges. These products shall be connected to an electrical supply curcuit with voltage as specified in 2.2.1 with a watt-hour meter installed in the circuit. The watt-hour meter shall be as described in 2.9.1.1. 2.1.2 Conventional gas ranges, ovens, and cooking tops and gas microwave/conventional gas ranges. These products shall be connected to a gas supply line with a gas meter installed between the supply line and the appliance being tested, according to manufacturer's specifications. The gas meter shall be as described in 2.9.2. Conventional gas ranges, ovens and cooking tops and microwave/conventional gas ranges with electrical ignition devices or other electrical components shall be connected to an electrical supply circuit of nameplate voltage with a watt-hour meter installed in the circuit. The watt-hour meter shall be as described in 2.9.1.1. 2.1.3 Microwave ovens. Install the microwave oven in accordance with the manufacturer's instructions and connect to an electrical supply circuit with voltage as specified in section 2.2.1. Disconnect all electrical devices or features, including clocks, which draw power when the microwave oven is turned off and which are not required for the operation of the oven. A watt-hour meter shall be installed in the circuit and shall be as described in 2.9.1.1. 2.2 Energy supply. 2.2.1 Electrical supply. Maintain the electrical supply to the conventional range, conventional cooking top, conventional oven, and microwave/conventional range being tested at 240/120 volts except that basic models rated only at 208/120 volts shall be tested at that rating. Maintain the electrical supply to a microwave oven at 120 volts and at 60 hertz. In every case, maintain the voltage within 2 percent of the voltage at which the appliance is tested. 2.2.2 Gas supply. 2.2.2.1 Gas burner adjustments. Conventional gas ranges, ovens, and cooking tops and microwave/conventional gas ranges shall be tested with all of the gas burners adjusted in accordance with the installation or operation instructions provided by the manufacturer. In every case, the burner must be adjusted with sufficient air flow to prevent a yellow flame or a flame with yellow tips. 2.2.2.2 Natural gas. For testing convertible cooking appliances or appliances which are designed to operate using only natural gas, maintain the natural gas pressure immediately ahead of all controls of the unit under test at 7 to 10 inches of water column. The regulator outlet pressure shall be approximately that recommended by the manufacturer. The natural gas supplied should have a heating value of approximately 1,025 Btu's per standard cubic foot. The actual gross heating value, H., in Btu's per standard cubic foot, for the natural gas to be used in the test shall be obtained either from measurements made by the manufacturer conducting the test using a standard continuous flow calorimeter as described in 2.9.4 or by the use of bottled natural gas whose gross heating value is certified to be at least as accurate a value as could be obtained from measurements taken with a standard continuous flow calorimeter as described in 2.9.4. 2.2.2.3 Propane. For testing convertible cooking appliances with propane or for testing appliances which are designed to operate using only LP-gas, maintain the propane pressure immediately ahead of all controls of the unit under test at 11 to 13 inches of water column. The regulator outlet pressure shall be approximately that recommended by the manufacturer. The propane supplied should have a heating value of approximately 2,500 Btu's per standard cubic foot. The actual gross heating value, H,, in Btu's per standard cubic foot, for the propane to be used in the test shall be obtained either from measurements made by the manufacturer conducting the test using a standard continuous flow calorimeter as described in 2.9.4 or by the use of bottled propane whose gross heating value is certified to be at least as accurate a value as could be obtained from measurements taken with a standard continuous flow calorimeter as described in 2.9.4. 2.2.2.4 Test gas. A basic model of a convertible cooking appliance shall be tested with natural gas, but may also be tested with propane. Any basic model of a conventional range, conventional cooking top, or conventional oven which is designed to operate using only natural gas as the energy source must be tested with natural gas. Any basic model of a conventional range, conventional cooking top, or conventional oven which is designed to operate using only LP gas as the gas energy source must be tested with propane gas. 2.3 Air circulation. Maintain air circulation in the room sufficient to secure reasonably uniform temperature distribution, but do not cause a direct draft on the unit under test. 2.4 Setting the conventional oven thermostat. 2.4.1 Conventional electric oven. Install a thermocouple approximately in the center of the usable baking space. Provide a temperature indicator system for measuring the oven's temperature with an accuracy as indicated in 2.9.3.2. If the oven thermostat does not cycle on and off, adjust or determine the conventional electric oven thermostat setting to provide an average internal temperature which is 325° ±5° F higher than the room ambient air temperature. If the oven thermostat operates by cycling on and off, adjust or determine the conventional electric oven thermostat setting to provide an average internal temperature which is 325° 5° F higher than the room ambient air temperature. This shall be done by measuring the maximum and minimum temperatures in any three consecutive cut-off/cuton actions of the electric resistance heaters, excluding the initial cut-off/cut-on action, by the thermostat after the temperature rise of 325° ±5° F has been attained by the conventional electric oven. Remove the thermocouple after the thermostat has been set. 2.4.2 Conventional gas oven. Install five parallel-connected weighted thermocouples, one located at the center of the conventional gas oven's usable baking space and the other four equally spaced between the center and the corners of the conventional gas oven on the diagonals of a horizontal plane through the center of the conventional gas oven. Each weighted thermocouple shall be constructed of a copper disc that is 1-inch in diameter and %-inch thick. The two thermocouple wires shall be located in two holes in the disc spaced 2-inch apart, with each hole being located 4-inch from the center of the disc. Both thermocouple wires shall be silver-soldered to the copper disc. Provide a temperature indicator system for measuring the oven's temperature with an accuracy as indicated in 2.9.3.2. If the oven thermostat does not cycle on or off, adjust or determine the conventional gas oven thermostat setting to provide an average internal temperature which is 325° ±5° F higher than the room ambient air temperature. If the oven thermostat operates by cycling on and off, adjust or determine the conventional electric oven thermostat setting to provide an average internal temperature which is 325° ±5° F higher than the room ambient air temperature. This shall be done by measuring the maximum and minimum temperatures in any three consecutive cut-off/cut-on actions of the gas burners, excluding the initial cut-off/cut-on action, by the thermostat after the temperature rise of 325° ±5° F has been attained by the conventional gas oven. Remove the thermocouples after the thermostat has been set. 2.5 Ambient room air temperature. During the test, maintain an ambient room air temperature, TR, of 77° ±9° F as measured at least 5 feet and not more than 8 feet from the nearest surface of the unit under test and approximately 3 feet above the floor. The temperature shall be measured with a thermometer or temperature indicating system with an accuracy as indicated in 2.9.3.1. 2.6 Normal nonoperating temperature. All areas of the appliance to be tested shall attain the normal nonoperating temperature, as defined in 1.5, before any testing begins. The equipment for measuring the applicable normal nonoperating temperature shall be as described in 2.9.3.1, 2.9.3.2, 2.9.3.4, and 2.9.3.5, as applicable. 2.7 Test blocks for conventional oven and cooking top. The test blocks shall be made of aluminum alloy No. 6061, with a specific heat of 0.23 Btu's/lb-°F and with any temper that will give a coefficient of thermal conductivity of 0.37 to 0.41 cal/cm-°Csec. Each block shall have a hole at its top. The hole shall be 0.08 inch in diameter and 0.80 inch deep. The manufacturer conducting the test may provide other means which will ensure that the thermocouple junction is installed at this same position and depth. The bottom of each block shall be flat to within 0.002 inch TIR (total indicator reading). Determine the actual weight of each test block with a scale with an accuracy as indicated in 2.9.5. 2.7.1 Conventional oven test block. The test block for the conventional oven, W1, shall be 6.25±0.05 inch in diameter, approximately 2.8 inches high and shall weigh 8.5±0.1 lbs. The block shall be finished with an anodic black coating which has a minimum thickness of 0.001 inch or with a finish having the equivalent absorptivity. 2.7.2 Small test block for conventional cooking top. The small test block, W2, shall be 6.25 0.05 inches in diameter, approximately 2.8 inches high and shall weigh 8.5±0.1 lbs. 2.7.3 Large test block for conventional cooking top. The large test block for the conventional cooking top, W., shall be 9±0.05 inches in diameter, approximately 3.0 inches high and shall weigh 19±0.1 lbs. 2.7.4 Thermocouple installation. Install the thermocouple such that the thermocouple junction (where the thermocouple contacts the test block) is at the bottom of the hole provided in the test block and that the thermocouple junction makes good thermal contact with the aluminum block. If the test blocks are to be water cooled between tests the thermocouple hole should be sealed, or other steps taken, to insure that the thermocouple hole is completely dry at the start of the next test. Provide a temperature indicator system for measuring the test block temperature with an accuracy as indicated in 2.9.3.3. 2.7.5 Initial test block temperature. Maintain the initial temperature of the test blocks, T1, within +4° F of the ambient room air temperature as specified in 2.5. If the test block has been cooled (or heated) to bring it to room temperature, allow the block to stabilize for at least 2 minutes after removal from the cooling (or heating) source, before measuring its initial temperature. 2.8 Test beakers. 2.8.1 Test beaker description. The five test beakers shall be made of a thin walled borosilicate glass. Two of the test beakers shall have an inside diameter of approximately 85 millimeters (mm). Three of the test beakers shall have an inside diameter of approximately 110 mm. 2.8.2 Test beaker load. Fill one of the 85 mm diameter test beakers with 275 milliliters (ml)±2.75 ml of distilled water containing 1 percent sodium chloride (NaCl) by weight. Fill one of the 85 mm diameter test beakers with 500 ml±5.0 ml of distilled water containing 1 percent NaCl by weight. Fill each of the 110 mm diameter test beakers with 1,000 ml±10.0 ml of distilled water containing 1 percent NaCl by weight. 2.8.2.1 Test beaker water load temperature. Maintain the initial temperature of the test beaker water load within the range of 68° F to 77° F. The temperature shall be measured with a thermometer or other equipment with an accuracy as indicated in 2.9.3.4. 2.9 Instrumentation. Perform all test measurements using the following instruments, as appropriate: least 1 watt-hour and a maximum error no greater than 1.5 percent of the measured value for any demand greater than 100 watts. The watt-hour meter for measuring the energy consumption of microwave ovens shall have a resolution of at least 0.1 watthour and a maximum error no greater than 1.5 percent of the measured value. 2.9.1.2 Wattmeter. The wattmeter shall have a resolution of at least 0.2 watt and a maximum error no greater than 5 percent of the measured value over the range of 0 to 10 watts. 2.9.2 Gas Measurements. 2.9.2.1 Positive displacement meters. The gas meter to be used for measuring the gas consumed by the gas burners of the oven or cooking top shall have a resolution of at least 0.01 cubic foot and a maximum error no greater than 1 percent of the measured value for any demand greater than 2.2 cubic feet per hour. If a positive displacement gas meter is used for measuring the gas consumed by the pilot lights, it shall have a resolution of at least 0.01 cubic foot and have a maximum error no greater than 2 percent of the measured value. 2.9.2.2 Flow meter. If a gas flow meter is used for measuring the gas consumed by the pilot lights, it shall be calibrated to have a maximum error no greater than 1.5 percent of the measured value and a resolution of at least 1 percent of the measured value. 2.9.3 Temperature measurement equipment. 2.9.3.1 Room temperature indicating system. The room temperature indicating system shall have an error no greater than +1°F over the range 65° to 90° F. 2.9.3.2 Temperature indicator system for measuring conventional oven temperature. The equipment for measuring the conventional oven temperature shall have an error no greater than ±4° F over the range of 65° to 500° F. 2.9.3.3 Temperature indicator system for measuring test block temperature. The system shall have an error no greater than 2° F when measuring specific temperatures over the range of 65° to 330° F. It shall also have an error no greater than 2° F when measuring any temperature difference up to 240° F within the above range. 2.9.3.4 Microwave oven and test load temperatures. The thermometer or other equipment used to measure the microwave oven temperature and its test load temperature shall have an error no greater than 1° F over the range of 65° to 140° F. 2.9.3.5 Temperature indicator system for measuring surface temperatures. The temperatures of an external surface of an appliance shall be measured by means of a thermocouple in firm contact with the surface. The temperature indicating system shall have an error no greater than ±1° F over the range 65° to 90° F. 2.9.4 Standard continuous flow calorimeter. The calorimeter shall have an operating range of 750 to 3,500 Btu's per cubic foot. The maximum error of the basic calorimeter shall be no greater than 0.2 percent of the gross heating value of the gas used in the test. The indicator readout shall have a maximum error no greater than 0.5 percent of the measured value within the above operating range and a resolution of 0.2 percent or less of the full scale reading of the indicator instrument. 2.9.5 Scale. The scale used for weighing the test blocks shall have a maximum error no greater than one ounce. 3. TEST METHODS AND MEASUREMENTS 3.1 Test methods. 3.1.1 Conventional oven. Perform a test by establishing the testing conditions set forth in 2 of this appendix, and adjust any pilot lights of a conventional gas oven in accordance with the manufacturer's instructions and turn off the gas flow to the conventional cooking top, if so equipped. Before beginning the test, the conventional oven shall be at its normal nonoperating temperature as defined in 1.5 and described in 2.6. Set the conventional oven test block W. approximately in the center of the usable baking space. If there is a selector switch for selecting the mode of operation of the oven, set for normal baking. If an oven permits baking by either forced convention using a fan, or without forced convection, the oven is to be tested in each of those two modes. If the oven thermostat does not cycle on and off, adjust or determine the conventional electric oven thermostat setting to provide an average internal temperature which is 325° ±5° F higher than the room ambient air temperature. If the oven thermostat operates by cycling on and off, adjust or determine the conventional electric oven thermostat setting to provide an average internal temperature which is 325° 5° of higher than the room ambient air temperature. If the oven thermostat operates by cycling on and off, the oven shall remain on for at least one complete thermostat "cut-off/cut-on" of the electrical resistance heaters or gas burners after the test block temperature has increased 234° F above its initial temperature. 3.1.1.1 Self-cleaning operation of a conventional oven. Perform a test by establishing the test conditions set forth in 2 of this appendix. Adjust any pilot lights of a conventional gas oven in accordance with the manufacturer's instructions and turn off the gas flow to the conventional cooking top. The temperature of the conventional oven shall be its normal nonoperating temperature as defined in 1.5 and described in 2.6. Then set the conventional oven's selfcleaning process in accordance with the manufacturer's instructions. If the selfcleaning process is adjustable, use the average time recommended by the manufacturer for a moderately soiled oven. 3.1.1.2 Continuously burning pilot lights of a conventional gas oven. Perform a test by establishing the test conditions set forth in 2 of this appendix. Adjust any pilot lights of a conventional gas oven in accordance with the manufacturer's instructions and turn off the gas flow to the conventional cooking top. If a positive displacement gas meter is used the test duration shall be sufficient to measure a gas consumption which is at least 200 times the resolution of the gas meter. 3.1.2 Conventional cooking top. Perform a test by establishing the test conditions set forth in 2 of this Appendix. Adjust any pilot lights of a conventional gas cooking top in accordance with the manufacturer's instructions and turn off the gas flow to the conventional oven(s), if so equipped. The temperature of the conventional cooking top shall be its normal nonoperating temperature as defined in 1.5 and described in 2.6. Set the test block in the center of the surface unit under test. The small test block, W2, shall be used on electric surface units of 7 inches or less in diameter. The large test block, W., shall be used on electric surface units over 7 inches in diameter and on all gas surface units. Turn on the surface unit under test and set its energy input rate to the maximum setting (100 percent). When the test block reaches 144°F above its initial test block temperature, immediately reduce the energy input rate to 25±5 percent of the maximum energy input rate. After 15±0.1 minutes at the reduced energy setting, turn off the surface unit under test. 3.1.2.1 Continuously burning pilot lights of a conventional gas cooking top. Perform a test by establishing the test conditions set forth in 2 of this Appendix. Adjust any pilot lights of a conventional gas cooking top in accordance with the manufacturer's instructions and turn off the gas flow to the conventional oven(s). If a positive displacement gas meter is used the test duration shall be sufficient to measure a gas consumption which is at least 200 times the resolution of the gas meter. 3.1.3 Microwave oven. Perform the tests by establishing the testing conditions set forth in 2 of this Appendix. Four tests are to be conducted with the water test loads in the following sequence: 2,000 ml, 1,000 ml, 500 ml and 275 ml. For each test, place the appropriate test beaker(s) containing the water load specified in 2.8.2 in approximately the center of the load carrying surface of the oven, and operate the microwave oven at its maximum microwave power setting until the temperature of the water load has been raised 45±9° F. Allow one minute for changing the test load beakers between each of the tests. For the 2,000 ml test, set the two test beakers, each containing 1,000 ml of the specified water load, side by side, in the approximate center of the oven. 3.2 Test measurements. 3.2.1 Conventional oven test energy consumption. If the oven thermostat is a type which controls the oven temperature without cycling on and off, measure the energy consumed, E., when the temperature of the block reaches T. (T. is 234° F above the initial block temperature, T1). If the oven thermostat operates by cycling on and off, make the following series of measurements: Measure the block temperature, TA, and the energy consumed, EA, at the end of the last "ON" period of the conventional oven before the block reaches T.. Measure the block temperature, TB, and the energy consumed, EB, at the beginning of the next "ON" period. Measure the block temperature, Te, and the energy consumed, Ec, at the end of that "ON" period. Measure the block temperature, TD, and the energy consumed, ED, at the beginning of the following "ON" period. Energy measurements for EA, EB, Ec and ED should be expressed in watthours for conventional electric ovens or standard cubic feet of gas for conventional gas ovens. For a gas oven measure in watthours any electrical energy, Elo, consumed by an ignition device or other electrical components required for the operation of a conventional gas oven while heating the test block to To 3.2.1.1 Energy consumption of self-cleaning operation. Measure the self-cleaning conventional electric or gas oven energy consumption, Es, specified as the number of watt-hours of electrical energy or standard cubic feet of gas, respectively, consumed during the self-cleaning test set forth in 3.1.1.1. For a gas oven also measure in watthours any electrical energy, Eis, consumed by an ignition device or other electrical components required during the self-cleaning test. 3.2.1.2 Gas consumption of continuously burning pilot lights. Measure the gas consumption of the pilot lights, P., in standard cubic feet of gas and the test duration, L., in hours for the test set forth in 3.1.1.2. If a gas flow meter is used, measure the flow rate, PR, in standard cubic feet per hour. 3.2.1.3 Clock power. If the conventional oven, conventional range, or microwave/ conventional range includes an electric clock which is on continuously, and the power rating in watts of this feature is not know, measure the clock power, PC, in watts. 3.2.2 Conventional surface unit test energy consumption. For the surface unit under test, measure the energy consump |