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5. Regional factors for adjusting the humidity loads of the respective regions.

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(Energy Policy and Conservation Act, Pub. L. 94-163, as amended by Pub. L. 94-384; Federal Energy Administration Act of 1974, Pub. L. 93-275, as amended by Pub. L. 94-385; Department of Energy Organization Act, Pub. L. 95-91; E.O. 11790, 39 FR 23185)

[42 FR 55604, Oct. 18, 1977. Redesignated and amended at 44 FR 37938, June 29, 1979]

APPENDIX L TO SUBPART B OF PART 430-UNIFORM TEST METHOD FOR MEASURING THE ENERGY CONSUMPTION OF DEHUMIDIFIERS

1. DEFINITIONS

1.1 "ANSI" means the American National Standard Institute.

1.2 "ANS B149.1-1972" means the test standard published by the ANSI, titled "American National Standard B149.1, Dehumidifiers", and designated as ANS B149.11972.

1.3 "Capacity" means a measure of the ability of a dehumidifier to remove moisture from its surrounding atmosphere.

1.4 "Rated capacity" means the amount of water, stated in pints, collected per 24 hours of continuous operation when tested in accordance with this Appendix.

2. TESTING CONDITIONS

2.1 Installation and Operational Conditions. Install the dehumidifier, and maintain the operating conditions, according to ANS B149.1-1972 as amended by section 3.1 of this Appendix. Install a watt-hour meter with an error not greater than 0.5 percent of the indicated value. The smallest scale graduation of the watt-hour meter shall not exceed one watt-hour.

3. TESTING AND MEASUREMENTS

3.1 Test. Perform a test by establishing the testing conditions set forth in section

2.1 of this Appendix, testing the dehumidifier in accordance with ANS B149.1-1972 sections 3, 4, 5, 6, and 7, except that paragraphs 5.1 and 6.3 of ANS B149.1-1972 shall be deleted.

3.2 Test Measurements. Measure the energy consumption (E), in kilowatt-hours (kWh) during the test performed according to section 3.1 and perform the measurements specified in section 7 of ANS B149.11972.

3.3 Recorded Values. Record both the energy consumption as measured according to section 3.2 of this Appendix and the data specified in section 7 of ANS B149.1-1972.

4. CALCULATION OF DERIVED RESULTS FROM TEST MEASUREMENTS

4.1 Rated Capacity. Calculate the rated capacity, C., expressed in pints of condensate collected per 24 hours, in accordance with section 7.5 of ANS B149.1-1972, the resulting quotient then being rounded off to the nearest 0.1 pints/day.

4.2 Hourly Energy Consumption. Calculate the hourly energy consumption (EH), expressed in kWh per hour and defined as:

EH=Cr/24× Es

C, the rated capacity as calculated in section 4.1 of this Appendix

E=the energy factor as calculated in section 430.22(1)(3).

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(Energy Policy and Conservation Act, Pub. L. 94-163, as amended by Pub. L. 94-384; Federal Energy Administration Act of 1974, Pub. L. 93-275, as amended by Pub. L. 94-385; Department of Energy Organization Act, Pub. L. 95-91; E.O. 11790, 39 FR 23185) [42 FR 55610, Oct. 18, 1977. Redesignated at 44 FR 37938, June 29, 1979]

APPENDIX M TO SUBPART B-UNIFORM TEST METHOD FOR MEASURING THE ENERGY CONSUMPTION OF CENTRAL AIR CONDITIONERS

1. DEFINITIONS

1.1 "Annual performance factor" means the total heating and cooling done by a heat pump in a particular region in one year divided by the total electric power used in one year.

1.2 "ARI" means Air-Conditioning and Refrigeration Institute.

1.3 "ARI Standard 210-79" means the test standard published in 1979 by the ARI and titled "Standard for Unitary Air-Conditioning Equipment".

1.4 "ARI Standard 240-77" means the test standard published in 1977 by the ARI and titled "Standard for Air-Source Unitary Heat Pump Equipment".

1.5 "ARI Standard 320-76" means the test standard published in 1976 by the ARI and titled "Standard for Water-Source Heat Pumps".

1.6 "ASHRAE" means the American Society of Heating, Refrigeration and Air-Conditioning Engineers, Inc.

1.7 "ASHRAE Standard 37-78" means the test standard published by ASHRAE in 1978 and titled "Methods of Testing for Rating Unitary Air-Conditioning and Heat Pump Equipment."

means a

1.8 "Continuously recorded" method of recording measurements in intervals no greater than 5 seconds.

1.9 "Cooling load factor (CLF)" means the ratio of the total cooling done in a complete cycle of a specified time period, consisting of an "on" time and "off" time, to the steady-state cooling done over the same period at constant ambient conditions.

1.10 "Cyclic Test" means a test where the indoor and outdoor conditions are held constant, but the unit is manually turned "on" and "off" for specific time periods to simulate part-load operation.

1.11 "Degradation coefficient (CD)" means the measure of the efficiency loss due to the cycling of the unit.

1.12 "Demand-defrost control system" means a system which is designed to perform the defrost function on the outdoor coil of the heat pump only when a predetermined degradation of performance is measured.

1.13 "Design heating requirement (DHR)" is the amount of heating required to maintain a given indoor temperature at a particular outdoor design temperature.

1.14 "Dry-coil test" means a test conducted at a wet-bulb temperature and a dry-bulb temperature such that moisture will not condense on the evaporator coil of the unit.

1.15 "Heating seasonal performance factor (HSPF)" means the total heating output of a heat pump during its normal annual usage period for heating divided by the total electric power input during the same period.

1.16 "Heating load factor (HLF)" means the ratio of the total heating done in a complete cycle of a specified time period, consisting of an "on" time "off" time, to the steady state heating done over the same period at constant ambient conditions.

1.17 "Latent cooling" means the amount of cooling in Btu's necessary to remove water vapor from the air passing over the indoor coil by condensation during a period of time.

1.18 "Part-load factor (PLF)" means the ratio of the cyclic energy efficiency ratio to the steady-state energy efficiency ratio at identical ambient conditions.

1.19 "Seasonal energy efficiency ratio (SEER)" means the total cooling of a central air conditioner in Btu's during its normal annual usage period for cooling divided by the total electric power input in watt-hours during the same period.

1.20 "Sensible cooling" means the amount of cooling in Btu's performed by a unit over a period of time, excluding latent cooling.

1.21 "Single package unit" means any central air conditioner in which all the major assemblies are enclosed in one cabinet.

1.22 "Split system" means any central air conditioner in which one or more of the major assemblies are separate from the others.

1.23 "Steady-state test" means a test in which all indoor and outdoor conditions are held constant and the unit is in non-changing operating mode.

1.24 "Temperature bin" means a 5° F increment over a dry-bulb temperature range of 65° F through 104° F for the cooling cycle and -25° F through 64° F for the heating cycle.

1.25 "Time-temperature defrost control system" means a system which automatically provides the defrost function at a predetermined time interval whenever the outdoor temperature drops below a level where frosting will occur.

1.26 "Test condition tolerance" means the maximum permissible variation of the average of the test observations from the standard or desired test condition as provided in 6.1.1, 6.2.1, 6.2.2, and 6.2.3 of this Appendix.

1.27 "Test operating tolerance" means the maximum permissible difference between the maximum and the minimum instrument observation during a test as provided in 6.1.1, 6.2.1, 6.2.2, and 6.2.3 of this Appendix.

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1.28 "Wet-coil test" means a test conducted at a wet-bulb temperature and a drybulb temperature such that moisture will condense on the test unit evaporator coil.

2. TESTING REQUIRED

2.1 Testing required for air source cooling only units with single speed compressors, two-speed compressors, two compressors, or cylinder unloading. Two steady state wet coil tests required to be performed, test A and test B. Test A is to be conducted as an outdoor dry bulb temperature of 95° F and test B at 82° F. Test C and D are optional tests to be conducted when cyclic performance parameters are to be measured in order to determine the degradation coefficient, CD Test C is a steady state dry coil test conducted at an outdoor dry bulb temperature of 82° F. Test D is a cyclic test also conducted at an outdoor dry bulb temperature of 82° F. In lieu of conducting tests C and D, an assigned value of 0.25 may be used for the degradation coefficient, CD.

2.1.1 Testing required for units with single speed compressors and single speed condenser fans. Test A and test B shall be performed according to the test procedures outlined in 4.1 of this Appendix. In addition, the cyclic performance shall be evaluated by conducting test C and D according to the requirements outlined in 4.1 of this Appendix. 2.1.2 Testing required for units with single speed compressors and multiple-speed condenser fans. The test requirements for multiple-speed condenser fan units shall be the same as described in section 2.1.1 for single speed condensor fan units.

2.1.3 Testing required for units with twospeed compressors, two compressors, or cylinder unloading. The test requirements for two-speed compressor units, two compressor units, or units with cylinder unloading are the same as described in 2.1.1 of this Appendix except that test A and test B shall be performed at each compressor speed or at each compressor capacity.

2.1.4 Testing required for units with twospeed compressors, two compressors, or cylinder unloading capable of varying the sensible to total (S/T) capacity ratio. When a unit employing a two-speed compressor, two compressors, or cylinder unloading provides a method of varying the ratio of the sensible cooling capacity to the total cooling capacity, (S/T), the test requirements are the same as for two-speed compressor units as described in 2.1.3 of this Appendix.

2.2 Testing required for air source heating only units with single speed compressors, two-speed compressors, two compressors, or cylinder unloading. Four types of tests are required to be performed: High Temperature, Cyclic, Frost Accumulation, and Low Temperature. In lieu of conducting the Cyclic Test an assigned value of 0.25

may be used for the degradation coefficient, CD.

2.2.1 Testing required for units with single speed compressors. Units with single speed compressors shall be subjected respectively to the High Temperature Test at 47° F described in section 3.2.1.1, the Cyclic Test as described in section 3.2.1.2, the Frost Accumulation Test as described in section 3.2.1.3, and the Low Temperature Test as described in section 3.2.1.4.

2.2.2 Testing required for units with twospeed compressors, two compressors, or cylinder unloading. With the unit operating: at high compressors speed (two-speed compressor), with both compressors in operation (two-compressors), or at the maximum capacity (cylinder unloading); the following tests are required to be performed on all units; the High Temperature Test at 47° F, the Frost Accumulation Test, and the Low Temperature Test. An additional test (cyclic at 47° F) is required, with the unit operating at the high compressor speed (two-speed compressor), with both compressors in operation (two compressors), or at the maximum capacity (cylinder unloading); if the normal mode of operation requires cycling "on" and "off" of the compressor(s) at high speed or maximum capacity.

With the unit operating: at the low compressor speed (two-speed compressor), with the single compressor which normally operates at low loads (two compressors), or at the low compressor capacity (cylinder unloading); the following tests are required to be performed on all units: the High Temperature Test at 47° F, the High Temperature Test at 62° F, and the Cyclic Test. Additional tests, (Frost Accumulation Test and Low Temperature Test) are required, with the unit operating: on low compressor speed (two-speed compressor), with the single compressor which normally operates at low loads (two compressors) or at the low compressor capacity (cylinder unloading), if the unit's low speed, one compressor or low capacity performance at and below 40° F is needed to calculate its seasonal performance.

2.3 Testing required for air source units which provide both heating and cooling. The requirements for units which provide both heating and cooling shall be the same as the requirements in Section 2.1. and 2.2 of this Appendix.

2.4 Testing required for water source units which provide both heating and cooling. (Reserved)

3. TESTING CONDITIONS

3.1 Testing conditions for air source cooling only units with single speed compressors, two-speed compressors, two compressors or cylinder unloading. The test room requirement and equipment installation

procedures are the same as those specified in sections 11.1 and 11.2 of ASHRAE Standard 37-78. Units designed for both horizontal and vertical installation shall be tested in the orientation in which they are most frequently installed. All tests shall be performed at the normal residential voltage and frequency for which the equipment is designed (either 115 or 230 volts and 60 hertz), the test installation shall be designed such that there will be no air flow through the cooling coil due to natural or forced convection while the indoor fan is "off". This shall be accomplished by installing dampers upstream and downstream of the test unit to block the off period air flow. Values of capacity for rating purposes are to be rounded off to the nearest 100 Btu/hour for capacities less than 20,000 Btu/hour; to the nearest 200 Btu/hour for capacities between 20,000 and 37,999 Btu/hour; and to the nearest 500 Btu/hour for capacities between 38,000 and 64,999 Btu/hour.

The following conditions listed in ARI Standard 210.79 shall apply to all tests performed in Section 3.1 of this Appendix: 5.1.3.4 Cooling Coil Air Quantity. 5.1.3.6 Requirements for Separated Assemblies.

3.1.1 Testing conditions for units with single speed compressors and single speed condenser fans.

3.1.1.1 Steady state wet-coil performance tests (Test A and Test B). Test A and test B shall be performed with the air entering the indoor side of the unit having a dry-bulb temperature of 80° F and a wet-bulb temperature of 87° F. The dry-bulb temperature of the air entering the outdoor side of the unit shall be 95° F in test A and 82° F in test B. The temperature of the air surrounding the outdoor side of the unit in each test shall be the same as the outdoor entering air temperature except for units or sections thereof intended to be installed only indoors, in which case the dry-bulb temperature surrounding that indoor side of the unit shall be 80° F. For those units which reject condensate to the condenser, located in the outdoor side of the unit, the outdoor wet-bulb temperature surrounding the outdoor side of the unit shall be 75° F in test A and 65° F in test B.

3.1.1.2 Steady state dry coil performance test (Test C) and cyclic dry coil performance test (Test D). Test C and test D shall be performed with the air entering the indoor side of the unit having a dry-bulb temperature of 80° F and a wet-bulb temperature which does not result in formation of condensate on the indoor coil. (It is recommended that an indoor wet-bulb temperature of 57° F or less be used.) The dry-bulb temperature of the air entering the outdoor portion of the unit shall be 82° F. The outdoor portion of the unit shall be subject to the same condi

tions as the requirements for conducting test B as stated previously in section 3.1.1.1. Test C shall be conducted with the unit operating steadily. Test D shall be conducted by cycling the unit "on" and "off" by manual or automatic operation of the normal control circuit of the unit. The unit shall cycle with the compressor "on" for 6 minutes and "off" for 24 minutes. The indoor fan shall also cycle "on" and “off”, the duration of the indoor fan "on" and "off" periods being governed by the automatic controls which the manufacturer normally supplies with the unit. The results of tests C and D shall be used to calculate a degradation coefficient, CD by the procedures outlined in 5.1 of this Appendix.

3.1.2 Testing conditions for units with single speed compressors and multiple-speed condenser fans. The condenser fan speed to be used in test A shall be that speed which normally occurs at an outdoor dry-bulb temperature of 95° F, and for test B, the fan speed shall be that which normally occurs at an outdoor dry-bulb temperature of 82° F. If elected to be performed, tests C and D shall be conducted at the same condenser fan speed as in test B.

3.1.3 Testing conditions for units with two-speed compressors, two compressors, or cylinder unloading. The condenser fan speed used in conducting test A at each compressor speed shall be that which normally occurs at an outdoor dry-bulb temperature of 95° F. For test B, the condenser fan speed at each compressor speed shall be that which normally occurs at an outdoor dry-bulb temperature of 82° F. If elected to be performed, tests C and D shall be conducted at the low compressor speed with the same condenser fan speed as used in test B. For those two-speed units in which the normal mode of operation involves cycling the compressor "on" and "off" at high speed, tests C and D shall also be performed with the compressor operating at high speed and at a condenser fan speed that normally occurs at test A ambient conditions. Units consisting of two compressors are subject to the same requirements as those units containing two-speed compressors, except that when operated at high speed, both compressors shall be operating and when operating at low speed, only the compressor which normally operates at an outdoor dry-bulb temperature of 82° F shall be operating.

In lieu of conducting tests C and D, an assigned value of 0.25 may be used for the degradation coefficient, Cp, at each compressor speed. If the assigned degradation coefficient is used for one compressor speed it must also be used for the other compressor speed.

In the case of units with cylinder unloading, the loaded and the unloaded conditions

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