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ARI 340-360_2004 (0503)

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ARI 340-360_2004 (0503)

    2004

    PERFORMANCE

     STANDARD for RATING OF

     COMMERCIAL

     AND

    INDUSTRIAL

    UNITARY AIR-

    CONDITIONING

    AND HEAT PUMP

    EQUIPMENT

    Standard 340/360

    4100 N. FAIRFAX DR., SUITE 200 • ARLINGTON, VIRGINIA 22203

    IMPORTANT

    SAFETY DISCLAIMER

ARI does not set safety standards and does not certify or guarantee the safety of any products, components or systems

    designed, tested, rated, installed or operated in accordance with this standard/guideline. It is strongly recommended

    that products be designed, constructed, assembled, installed and operated in accordance with nationally recognized

    safety standards and code requirements appropriate for products covered by this standard/guideline.

    ARI uses its best efforts to develop standards/guidelines employing state-of-the-art and accepted industry practices. ARI does not certify or guarantee that any test conducted under its standards/guidelines will be non-hazardous or free from risk.

     ARI CERTIFICATION PROGRAM PROVISIONS Scope of the Certification Program The Certification Program includes all air-cooled, water-cooled and evaporatively-cooled unitary air-conditioning, air-source unitary heat pump equipment, and air-conditioning condensing units rated at or above 65,000 Btu/h [19,000 W] at ARI Standard Rating Conditions (Cooling) but below 250,000 Btu/h [73,200 W] at ARI Standard Rating Conditions (Cooling). Certified Ratings The following Certification Program ratings are verified by test: Unitary Air-Conditioners and Air-Conditioning Condensing Units Air-cooled, water-cooled and evaporatively-cooled from 65,000 Btu/h [19,000 W] to below 250,000 Btu/h [73,200 W]. 1. ARI Standard Rating Cooling Capacity, Btu/h 2. Energy Efficiency Ratio, EER, Btu/W?h 3. Integrated Part-Load Value, IPLV Air-Source Unitary Heat Pump Equipment Air-cooled from 65,000 Btu/h [19,000 W] to below 250,000 Btu/h [73,200 W]. 1. ARI Standard Rating Cooling Capacity, Btu/h

    2. Energy Efficiency Ratio, EER, Btu/W?h 3. High Temperature Heating Standard Rating Capacity, Btu/h

    4. High Temperature Coefficient of Performance (COP 47?F) 5. Low Temperature Heating Standard Rating Capacity, Btu/h

    6. Low Temperature Coefficient of Performance (COP 17?F) 7. Integrated Part-Load Value, IPLV Conformance to the requirements of the Maximum Operating Condition Test, Cooling Low Temperature Operation Test, Insulation Efficiency Test (Cooling), and Condensate Disposal Test (Cooling) are also verified by test.

    Note:

    This standard supersedes ARI Standard 340/360-2000.

     Price $15.00 (M) $30.00 (NM) ?Copyright 2004, by Air-Conditioning and Refrigeration Institute Printed in U.S.A. Registered United States Patent and Trademark Office

     TABLE OF CONTENTS SECTION PAGE

Section 1. Purpose ........................................................................................................... 1

Section 2. Scope .............................................................................................................. 1

Section 3. Definitions ...................................................................................................... 1

Section 4. Classifications ................................................................................................. 2

Section 5. Test Requirements .......................................................................................... 2

Section 6. Rating Requirements ....................................................................................... 2

Section 7. Minimum Data Requirements for Published Ratings ...................................... 10

Section 8. Operating Requirements ................................................................................ 10

Section 9. Marking and Nameplate Data ........................................................................ 12

Section 10. Conformance Conditions ............................................................................... 12

     TABLES

Table 1. Classification of Commercial and Industrial Unitary Air-Conditioning

    Equipment ...................................................................................................... 4

Table 2. Classification of Commercial and Industrial Unitary Heat Pump Equipment ..... 5

Table 3. Conditions for Standard Rating and Operating Tests ...................................... 6

Table 4. Minimum External Pressure............................................................................. 7

    FIGURES

Figure 1. Part-Load Factor Curve .................................................................................. 9

    APPENDICES

Appendix A. References - Normative ................................................................................. 13

Appendix B. References - Informative ............................................................................... 13

Appendix C. Capacity Calculation For Unitary Equipment Using an Outdoor

     Air Cooling Coil Normative ...................................................................... 14

Appendix D. Method and Example of Calculating Integrated Part-Load

     Values (IPLV) - Normative ........................................................................... 16

    TABLES FOR APPENDICES

Table D1. Example IPLV Calculation (I-P Units) .......................................................... 18

    FIGURES FOR APPENDICES

Figure C1. Test Set-Up for Units Using an Outdoor Coil ................................................ 15

Figure D1. Part-Load Factor Example ............................................................................ 17

     ARI STANDARD 340/360-2004

    PERFORMANCE RATING OF COMMERCIAL AND

    INDUSTRIAL UNITARY AIR-CONDITIONING AND HEAT

    PUMP EQUIPMENT

     Section 1. Purpose Section 3. Definitions All terms in this document shall follow the standard industry 1.1 Purpose. The purpose of this standard is to establish definitions in the current edition of ASHRAE Terminology for Commercial and Industrial Unitary Air-Conditioning of Heating, Ventilation Air-Conditioning and and Heat Pump Equipment: definitions; classifications; test Refrigeration, unless otherwise defined in this section. requirements; rating requirements; minimum data requirements for Published Ratings; operating requirements; 3.1 Coefficient of Performance. A ratio of the marking and nameplate data; and conformance conditions. cooling/heating capacity in watts [W] to the power input values in watts [W] at any given set of rating conditions 1.1.1 Intent. This standard is intended for the expressed in watts/watts [W/W]. For heating COP, guidance of the industry, including manufacturers, supplementary resistance heat shall be excluded. engineers, installers, contractors and users. 3.1.1 Standard Coefficient of Performance. A 1.1.2 Review and Amendment. This standard is ratio of the capacity to power input value obtained at subject to review and amendment as technology Standard Rating Conditions. advances. 3.2 Commercial and Industrial Unitary Air-Conditioner. One or more factory-made assemblies, which includes a

    cooling coil, an air moving device, a compressor(s) and

    condenser combination, and may include a heating function Section 2. Scope as well. Where such equipment is provided in more than one assembly, the separate assemblies shall be designed to 2.1 Scope. This standard applies to factory-made be used together, and the requirements of rating outlined in Commercial and Industrial Unitary Air-Conditioning and this standard shall be based upon the use of matched Heat Pump Equipment as defined in Section 3. assemblies. 2.1.1 Energy Source. This standard applies only 3.2.1 Functions. The functions of Commercial to electrically operated, vapor compression and Industrial Unitary Air-Conditioners, either alone refrigeration systems. or in combination with a heating plant, are to provide air-circulation, cooling, dehumidification, and may 2.2 Exclusions. This standard does not apply to the include the functions of heating, humidifying, following: outdoor air ventilation, and air cleaning. 2.2.1 Rating and testing of individual assemblies, 3.3 Commercial and Industrial Unitary Heat Pump. such as condensing units or coils, for separate use. One or more factory-made assemblies, which normally include an indoor conditioning coil, an air moving device, 2.2.2 Unitary Air-Conditioners as defined in ARI compressor(s), and an outdoor coil(s), including means to Standard 210/240, Unitary Air-Conditioning and provide a heating function and may or may not include a Air-Source Heat Pump Equipment, with capacities cooling function. When such equipment is provided in less than 65,000 Btu/h [19 000 W], or to Unitary more than one assembly, the separate assemblies shall be Heat Operated Air-Conditioning Equipment, or designed to be used together, and the requirements of rating Water-Source Heat Pumps as defined in ISO 13256-outlined in the standard shall be based upon the use of 1, Water-Source Heat Pumps Testing and Rating matched assemblies. for Performance Part I: Water-to-Air and Brine- to-Air Heat Pumps. 3.3.1 Functions. Commercial and Industrial Unitary Heat Pumps shall provide the function of 2.2.3 Rating of units equipped with heating, air circulation and may include the function desuperheater/water heating devices (as defined in of air cooling, dehumidifying or humidifying, outdoor ANSI/ASHRAE Standard 137) in operation. air ventilation, and air cleaning.

    1

    ARI STANDARD 340/360-2004 33 3.10 Standard Air. Air weighing 0.075 lb/ft [1.2 kg/m] 3.4 Cooling Capacity. The capacity associated with the which approximates dry air at 70ºF [21ºC] and at a

    change in air enthalpy which includes both the Latent and barometric pressure of 29.92 in Hg [101.1 kPa]. Sensible Capacities expressed Btu/h [W].

     Section 4. Classifications 3.4.1 Latent Capacity. Capacity associated with a change in humidity ratio. Commercial and Industrial Unitary Air-Conditioning and Heat Pumps Equipment within the scope of this standard 3.4.2 Sensible Capacity. Capacity associated shall be classified as shown in Tables 1 and 2. with a change in dry-bulb temperature.

    3.5 Energy Efficiency Ratio (EER). A ratio of the Section 5. Test Requirements Cooling Capacity in Btu/h to the power input values in watts at any given set of rating conditions expressed in Btu/W?h. 5.1 All standard ratings shall be verified by tests conducted in accordance with ASHRAE Standard 37 and 3.6 Integrated Part-Load Value (IPLV). A single with the test methods and procedures as described in this number cooling part-load efficiency figure of merit standard and its appendices. calculated per the method described in 6.2.2. 3.7 Published Rating. A statement of the assigned Section 6. Rating Requirements values of those performance characteristics, under stated Rating Conditions, by which a unit may be chosen to fit its 6.1 Standard Ratings. Standard Ratings shall be application. These values apply to all units of like nominal established at the Standard Rating Conditions specified in size and type (identification) produced by the same Table 3. Standard Ratings related to cooling or heating manufacturer. The term Published Rating includes the capacities shall be net values, including the effects of rating of all performance characteristics shown on the air-circulating fan heat, but not including supplementary heat. conditioner or heat pump or published in specifications, Standard Ratings (Cooling) shall be stated as total Cooling advertising, or other literature controlled by the Capacity. manufacturer, at stated Rating Conditions. Standard Ratings shall be based on the total power input to 3.7.1 Application Rating. A rating based on tests the compressor(s) and fan(s), plus controls and other items performed at application Rating Conditions (other required as part of the system for standard rating operation. than Standard Rating Conditions). Standard Ratings of units which do not have indoor air-3.7.2 Standard Rating. A rating based on tests circulating fans furnished as part of the model, i.e., split performed at Standard Rating Conditions. systems with indoor coil alone, shall be established by subtracting 1250 Btu/h per 1000 cfm [775 W/m3.8 Rating Conditions. Any set of operating conditions

    under which a single level of performance results and which 3/s] from causes only that level of performance to occur. the total cooling capacity, and by adding the same amount to the heating capacity. Total power input for both heating and 3.8.1 Standard Rating Conditions. Rating cooling shall be increased by 365 W per 1000 cfm [226 conditions used as the basis of comparison for 3W/m/s] of indoor air circulated. performance characteristics. Standard Ratings of water-cooled units from 65,000 to 3.9 "Shall" or "Should". "Shall" or "should" shall be below 135,000 Btu/h [19,000 to 39,600 W] shall include a interpreted as follows: total allowance for cooling tower fan motor and circulating water pump motor power inputs to be added in the amount 3.9.1 Shall. Where "shall" or "shall not" is used of 10.0 W per 1000 Btu/h [34.1 W per 1000 W] cooling for a provision specified, that provision is mandatory capacity. if compliance with the standard is claimed. 6.1.1 Values of Standard Capacity Ratings. 3.9.2 Should. “Should” is used to indicate These ratings shall be expressed in terms of Btu/h provisions which are not mandatory but which are [W] as shown. desirable as good practice.

2

    Capacity Ratings, Multiples, ARI STANDARD 340/360-2004 Btu/h [W] Btu/h [W]

    65,000 up to 135,000 1000 [300] O [0 Pa] external 2b. Equipment with indoor fans not intended [19,000 up to 39,600] pressure as specified by the manufacturer. for use with field installed duct systems (free discharge) shall be rated at the 136,000 up to 400,000 2000 [600] c. 100% recirculated air shall be used indoor-side air quantity delivered when [39,800 up to 117,000] except when the rating with outside air is operating at 0 in Habove 400,000 5000 [1,500] claimed (6.1.3.6). For units equipped for [above 117,000] multi-zone or dual duct operation, the hot deck shall be closed off using dampers supplied with the unit. 6.1.2 Values of Energy Efficiency Ratios and Coefficients of Performance. Energy Efficiency d. Equipment which does not incorporate an Ratios (EER) and Integrated Part-Load Values indoor fan, but is rated in combination (IPLV) for cooling, whenever published, shall be with a device employing a fan shall be expressed in multiples of the nearest 0.1. rated as described under 6.1.3.2a. For Coefficients of Performance (COP) for heating or equipment of this class which is rated for cooling, whenever published, shall be expressed in general use to be applied to a variety of multiples of the nearest 0.1. heating units, the indoor-coil airflow rate shall be the lesser of: (1) the 6.1.3 Standard Rating Tests. Table 3 indicates manufacturer specified Standard Ratings, the tests and test conditions which are required to not to exceed 37.5 SCFM/1000 Btu/h determine values of standard capacity ratings and [0.06 mvalues of energy efficiency. Standard cooling ratings 3/s per 1000 W] of rated capacity are not applicable for heating-only heat pumps.

    or (2) the airflow rate obtained through

    the indoor coil assembly when the 6.1.3.1 Voltage and Frequency.

    pressure drop across the indoor coil Standard Rating tests shall be performed at

    assembly and the recommended the nameplate rated voltage(s) and

    enclosures and attachment means is not frequency.

    greater than 0.30 in H O [75 Pa]. 2 For air-conditioners and heat pumps with dual nameplate voltage ratings, Standard e. Indoor-coil airflow rates and pressures as Rating tests shall be performed at both referred to herein apply to the airflow rate voltages, or at the lower of the two voltages, experienced when the unit is cooling and if only a single Standard Rating is to be dehumidifying under the conditions published. specified in this section. This airflow rate, except as noted in 6.1.3.2b and 8.3, 6.1.3.2 Indoor-Coil Airflow Rate. All shall be employed in all other tests Standard Ratings shall be determined at an prescribed herein without regard to indoor-coil airflow rate as outlined below. resulting external static pressure. All airflow rates shall be expressed in terms Heating-only units shall use the airflow of Standard Air. rate experienced when the unit is operating under the high temperature a. Equipment with indoor fans intended steady-state heating standard test at for use with field installed duct Standard Rating Conditions. systems shall be rated at the indoor- coil airflow rate (not to exceed 37.5 SCFM per 1000 Btu/h [0.06 m

     3 /s per 1000 W] of rated capacity) delivered when operating against the minimum external resistance

    specified in Table 4 or at a lower

    indoor-coil airflow rate if so

    specified by the manufacturer.

    3

    ARI STANDARD 340/360-2004 Table 1. Classification of Commercial and

     Industrial Unitary Air-Conditioning Equipment

     Types of Commercial and Industrial Unitary Air-Conditioners

     1, 2 Designation ARI TypeArrangement

     Single Package SP-A FAN COMP SP-E EVAP COND SP-W

     Year-Round SPY-A FAN Single SPY-E HEAT COMP Package SPY-W EVAP COND

     Condensing RCU-A-CB FAN COMP Unit, Coil and Blower RCU-E-CB EVAP COND RCU-W-CB

     Year-Round RCUY-A-CB FAN Condensing Unit, Coil and RCUY-E-CB COND HEAT Blower RCUY-W-CB COMP EVAP

     Remote RC-A FAN Condenser RC-E COND EVAP RC-W COMP Condensing RCU-A-C EVAP COND Unit, Coil RCU-E-C COMP Alone RCU-W-C Year-Round RCY-A FAN Remote Condenser RCY-E EVAP COND RCY-W HEAT COMP

    Note:

    1 A suffix of “-O” following any of the above classifications indicates equipment not intended

    for use with field-installed duct systems (6.1.3.2b). 2 A suffix of “-A” indicates air-cooled condenser, -E” indicates evaporatively-cooled condenser, and “-W” indicates water-cooled condenser.

    4

     ARI STANDARD 340/360-2004

     Table 2. Classification of Commercial and Industrial Unitary Heat Pump Equipment Types of Commercial and Industrial Unitary Heat Pumps 1 ARI TypeArrangement Heating and Heating Designation Cooling Only

    Single Package HSP-A HOSP-A FAN COMP

    INDOOR OUTDOOR

    COIL COIL

Remote Outdoor HRC-A-CB HORC-A-CB FAN

    Coil OUTDOOR COIL INDOOR COIL COMP

     Remote Outdoor HRC-A-C HORC-A-C INDOOR COIL OUTDOOR COIL Coil with No COMP Indoor Fan

    Split System HRCU-A-CB HORCU-A-CB FAN COMP

    INDOOR COIL OUTDOOR COIL

    Split System HRCU-A-C HORCU-A-C COMP with No Indoor INDOOR COIL OUTDOOR COIL Fan

    Note: 1 A suffix of “-O” following any of the above classifications indicates equipment not intended for use with field-installed duct systems (6.1.3.2b).

    5

    Table 3. Conditions for Standard Rating and Operating Tests ARI STANDARD 340/360-2004 INDOOR OUTDOOR SECTION

     SECTION Air Entering Air Entering Water

     Air Cooled Evaporative TEST Dry- Wet-Dry-Wet-Dry-Wet-Bulb Bulb Bulb Bulb Bulb Bulb IN OUT ºF

    ºF ºF ºF ºF ºF ºF ºF [ooooooooC] [C] C] [[C] [C] [C] [C] [C] 1 Standard Rating Conditions 95.0 75.0 85.0 95.0 80.0 67.0 95.0 75.03Cooling[23.9] [35.0] [23.9] [29.4] [35.0] [26.7] [19.4] [35.0] 12 Low Temperature Operating 67.0 57.0 -- 70.067.0 57.0 67.0 57.03Cooling[13.9] [19.4] [13.9] [19.4] [13.9] [19.4] [21.1] 314 2 Maximum Operating Conditions 80.0 67.0 115 75.0 100 80.090.0-- [26.7] [19.4] [46.1] [23.9] [37.8] [26.7] [32.2] 123Part-Load Conditions (IPLV) 80.0 67.0 75.0 -- 80.0 67.0 80.0 67.0

    [26.7] [19.4] [26.7] [19.4] [26.7] [19.4] [23.9] 31Insulation Efficiency 80.0 75.0 80.0 75.0 80.0 75.0 -- 80.0

    [26.7] [23.9] [26.7] [23.9] [26.7] [23.9] [26.7] 31Condensate Disposal 80.0 75.0 80.0 75.0 80.0 75.0 -- 80.0

    [26.7] [23.9] [26.7] [23.9] [26.7] [23.9] [26.7] Standard Rating Conditions 70.0 60.0 47 43 -- -- -- --

    (High Temperature Steady State [21.1] [15.6] [8.3] [6.1]

    Heating) (max)

     Standard Rating Conditions 70.0 60.0 17 15 -- -- -- --

    (Low Temperature Steady State [21.1] [15.6] [-8.3] [-9.4]

    Heating) (max)

     HEATING COOLING Maximum Operating Conditions 80.0 -- 75.0 65.0 -- -- -- --

    [26.7] [23.9] [18.3]

    NOTES:

     1 The wet-bulb temperature condition is not required when testing air cooled condensers which do not evaporate condensate

    except for units with optional outdoor cooling coil. 2 Water flow rate as determined from Standard Rating Conditions Test. 3 Cooling rating and operating tests are not required for heating only heat pumps. 4 Make-up water temperature shall be 90ºF [32ºC].

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