1、 2015 Standard for Sound Performance Rating of Non-ducted Indoor Air-conditioning and Heat Pump Equipment Approved by ANSI on July 15, 2016 ANSI/AHRI Standard 350 Price $10.00 (M) $20.00 (NM) Copyright 2015, by Air-Conditioning, Heating, and Refrigeration Institute Printed in U.S.A. Registered Unite
2、d States Patent and Trademark Office IMPORTANT SAFETY DISCLAIMER AHRI 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 recommende
3、d 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. AHRI uses its best efforts to develop standards/guidelines employing state-of-the-a
4、rt and accepted industry practices. AHRI does not certify or guarantee that any tests conducted under its standards/guidelines will be non-hazardous or free from risk. Note: This standard supersedes AHRI Standard 350-2008. Foreword This standard references the sound intensity test method defined in
5、ANSI/AHRI Standard 230, as an alternate method of test to the reverberation room test method defined in ANSI/AHRI Standard 220 for determination of sound power ratings. Provisions for addressing Concealed versus Exposed Equipment test configurations have been added. TABLE OF CONTENTS SECTION PAGE Se
6、ction 1. Purpose 1 Section 2. Scope . 1 Section 3. Definitions . 1 Section 4. Test Requirements . 2 Section 5. Rating Requirements . 5 Section 6. Minimum Data Requirements for Published Ratings 6 Section 7. Marking and Nameplate Data . 6 Section 8. Conformance Conditions. 6 TABLES Table 1. Reproduci
7、bility in the Determination of Non-ducted Equipment Sound Power Levels 5 FIGURES Figure 1. Location of Equipment in the Test Room . 3 APPENDICES Appendix A. References Normative 7 Appendix B. References Informative 8 Appendix C. Examples of Various Types of Exposed and Concealed Equipment Informativ
8、e 9 FIGURES FOR APPENDICES Figure C1. Exposed Sill Unit 9 Figure C2. Exposed Vertical Stack Unit . 9 Figure C3. Exposed Horizontal Fan Coil Unit 10 Figure C4. Concealed Sill Unit . 11 Figure C5. Concealed Vertical Stack Unit 11 Figure C6. Concealed Horizontal Fan Coil Unit . 12 Figure C7. Concealed
9、Vertical Stack Unit Test Setup 5cm x 10cm Studs Cladded with 1.3cm Thick Drywall . 13 Figure C8. Concealed Horizontal Stack Unit Test Setup Cladded with 1.3cm Thick Drywall . 13 ANSI/AHRI STANDARD 350-2015 1 SOUND PERFORMANCE RATING OF NON-DUCTED INDOOR AIR-CONDITIONING AND HEAT PUMP EQUIPMENT Secti
10、on 1. Purpose 1.1 Purpose. The purpose of this standard is to establish for Non-ducted Indoor Air-conditioning and Heat Pump Equipment definitions; test requirements; rating requirements; minimum data requirements for Published Ratings; marking and nameplate data; and conformance conditions. 1.1.1 I
11、ntent. This standard is intended for the guidance of the industry, including manufacturers, engineers, installers, contractors and users. 1.1.2 Review and Amendment. This standard is subject to review and amendment as technology advances. Section 2. Scope 2.1 Scope. This standard applies to the indo
12、or portions of factory-made Non-ducted Air-conditioning and Heat Pump Equipment as defined in ANSI/AHRI Standards 210/240, 340/360, 310/380, 440 and 1230. Products covered include but are not limited to: fan coils, air-source unitary heat pumps as well as unitary air-conditioners, water-source heat
13、pumps, packaged terminal equipment, and variable refrigerant flow (VRF) systems. Section 3. Definitions All terms in this document will follow the standard industry definitions in the ASHRAE Terminology website (https:/www.ashrae.org/resources-publications/free-resources/ashrae-terminology) unless o
14、therwise defined in this section. 3.1 Concealed Equipment. Non-ducted Indoor Air-conditioning and Heat Pump Equipment that is designed to be located outside of the occupied space such that the casing radiated noise is acoustically isolated from the inlet and discharge sound. Refer to Appendix C for
15、examples of various types of Concealed Equipment configurations. 3.2 Exposed Equipment. Non-ducted Indoor Air-conditioning and Heat Pump Equipment that is in the occupied space such that the casing radiated noise is included with the inlet and discharge sound. Refer to Appendix C for examples of var
16、ious types of Exposed Equipment configurations. 3.3 Hertz (Hz). A unit of frequency equal to one cycle per second. 3.4 Non-ducted Indoor Air-conditioning and Heat Pump Equipment. For the purposes of this standard, non-ducted equipment communicates with the occupied space by free delivery and inlet o
17、r through enclosed airways with lengths less than 1 effective duct diameter. 3.5 Octave Band. A band of sound covering a range of frequencies such that the highest is twice the lowest. The Octave Bands used in this standard are those defined in ANSI/ASA Standard S1.11. 3.6 One-third Octave Band. A b
18、and of sound covering a range of frequencies such that the highest frequency is the cube root of two times the lowest frequency. The One-third Octave Bands used in this standard are those defined in ANSI/ASA Standard S1.11. 3.7 Published Rating. A statement of the assigned values of those performanc
19、e characteristics, under stated rating conditions, by which a unit may be chosen to fit its application. These values apply to all units of like nominal size and type (identification) produced by the same manufacturer. As used herein, the term Published Rating includes the rating of all performance
20、characteristics shown on the unit or published in specifications, advertising or other literature controlled by the manufacturer, at stated rating conditions. ANSI/AHRI STANDARD 350-2015 2 3.7.1 Application Rating. A rating based on tests performed at application Rating Conditions (other than Standa
21、rd Rating Conditions). 3.7.2 Standard Rating. A rating based on tests performed at Standard Rating Conditions. 3.8 Reference Sound Source (RSS). Portable, aerodynamic sound source that produces a known stable broad band sound power output as defined in ANSI/AHRI Standard 250. 3.9 Reproducibility. De
22、viations in test results are obtained with the same method on identical test items in different laboratories with different operators using different equipment. 3.10 “Shall” or “Should”. “Shall” or “should” shall be interpreted as follows: 3.10.1 Shall. Where “shall” or “shall not” is used for a pro
23、vision specified, that provision is mandatory if compliance with the standard is claimed. 3.10.2 Should. “Should” is used to indicate provisions which are not mandatory but which are desirable as good practice. 3.11 Sound Power Level, Lw. Ten times the logarithm to the base ten of the ratio of the s
24、ound power radiated by the source to a reference sound power, expressed in decibels, dB. The reference sound power used in this standard is 1 picowatt, pW. 3.11.1 A-weighted Sound Power Level, LwA. The logarithmic summation of A-weighted, one-third octave band Sound Power Levels. 3.12 Sound Pressure
25、 Level, Lp. Twenty times the logarithm to the base ten of the ratio of a given sound pressure to a reference sound pressure of 20 Pa, expressed in decibels, dB. 3.13 Sound Quality Indicator (SQI). The calculated metric determined when following the procedure contained in ANSI/AHRI Standard 1140 for
26、quantifying sound quality whereby measured sound levels are weighted to adjust for psychoacoustic sensitivity to frequency distribution and any discrete tones which may be present and then converted to a single number Sound Quality Indicator. Section 4. Test Requirements 4.1 Test Requirements. Unit
27、Sound Power Level shall be determined by tests conducted in a reverberation room or using sound intensity. 4.1.1 If the reverberation room method is used, Sound Power Levels for the unit under test shall be determined according to ANSI/AHRI Standard 220. The reverberation room shall meet the require
28、ments of and be qualified in accordance with ANSI/AHRI Standard 220, except as noted within the body of this standard. A RSS shall be used that meets the performance requirements and is calibrated per ANSI/AHRI Standard 250 4.1.2 If the sound intensity method is used, Sound Power Levels for the unit
29、 under test shall be conducted in accordance with ANSI/AHRI Standard 230. 4.1.3 Measured sound data shall be in One-third Octave Bands (100 Hz to 10,000 Hz are required, 50 Hz to 80 Hz are optional) in accordance with the procedures specified above for the method of test being used. A record shall b
30、e made of the actual equipment thermal rating conditions under which the equipment was tested. In addition, the equipment volumetric flow rate, m3/s, and external static pressure, kPa gage, shall be recorded. 4.2 Setup of Equipment for Testing. Equipment shall be mounted in a way that is representat
31、ive of a design application of the product. 4.2.1 Position A (Figure 1) Mounted away from wall. 4.2.2 Position B (Figure 1) Mounted against or through the wall with the bottom of equipment on the floor. The equipment shall be mounted at the minimum manufacturers recommended projection into the room.
32、 ANSI/AHRI STANDARD 350-2015 3 4.2.3 Position C (Figure 1) Mounted against or through the wall but the bottom of equipment is not on the floor. The equipment shall be mounted at the minimum manufacturers recommended projection into the room. 4.2.4 Position D (Figure 1) Ceiling mounted equipment may
33、be suspended from the sound room ceiling or from a frame device or mounted on rails rigidly supported, for example, by concrete blocks. 4.2.5 All equipment shall be mounted according to the manufacturers installation instructions. If any deviations from these instructions are necessary, they shall b
34、e done in a manner that will not affect the acoustic performance of the equipment. A = Location for equipment used away from a wall B = Location for equipment used against or through the wall on the floor C = Location for equipment mounted against or through a wall D = Location for equipment suspend
35、ed or fastened to ceiling X = 1.5 m minimum to adjoining room surfaces(s) other than mounting plane Y = Manufacturers recommended minimum Figure 1. Location of Equipment in the Test Room 4.2.6 In the case of wall-mounted equipment, the mounting wall shall be a heavy masonry or equivalent constructio
36、n, or auxiliary mounting platform shall be provided, to minimize wall vibration effects. 4.2.7 Exposed, non-ducted equipment shall be setup in the test room without enclosure or ductwork. 4.2.8 Concealed Equipment shall be installed with the casing radiated noise acoustically isolated from the measu
37、red combined inlet and discharge sound and operated at free-delivery conditions. Acoustic isolation shall be achieved with either: 4.2.8.1 A stud construction enclosure with a minimum of 12 mm drywall or equivalent. The enclosure shall not be in contact with the equipment under test except at the in
38、let and outlet. Installation shall be mid-wall style (conforming to Figure 1, and as suggested in Figure C7), unless otherwise specified in the manufacturers installation, operation and maintenance (IOM) manual. 4.2.8.2 Direct attachment of 12 mm drywall to the equipment with sheet metal screws or a
39、dhesive. The laboratory shall record details of the construction enclosure, including: stud type, orientation and spacing, drywall thickness, spacing between the equipment and drywall and sound absorptive material if present. If direct attached the attachment method shall be noted. A description of
40、any grills, diffusers or acoustic panels used in the test setup shall be recorded. ANSI/AHRI STANDARD 350-2015 4 4.2.9 Concealed Equipment with either the inlet or discharge airway ducted shall be rated in accordance with ANSI/AHRI Standards 260 (I-P) and 261 (SI). For the purposes of this standard,
41、 a duct is an enclosed airway with a length greater than 1 effective diameter according to Equation 1. A4 = D 2/11 Where: A = Cross-sectional area of the duct, m2 D = Effective diameter, m 4.3 Electrical Characteristics. Tests shall be performed at the rated voltage(s), phase, and frequency specifie
42、d on the unit nameplate and measured at the unit service connection. 4.4 Air Quantity. The volumetric flow rate of both indoor and outdoor fans (if any) shall be the same as required to produce the rated capacity under the appropriate AHRI standard. 4.5 Operation. All components required to produce
43、the standard rating cooling capacity under the appropriate AHRI standard shall be operated while data is being taken. Standard Rating Conditions (cooling) for the appropriate standard shall be maintained. 4.5.1 For free-delivery air-source heat pumps rated under ANSI/AHRI Standards 210/240, 340/360,
44、 and 310/380, the heating mode shall also be used to sound rate this equipment using the following conditions: Indoor dry bulb: 21.0C Outdoor dry bulb: 18.0C Outdoor wet bulb: 13.0C 4.5.2 Room fan-coil air-conditioners rated per ANSI/AHRI Standard 440 shall be tested without water circulating throug
45、h the coil. 4.5.3 Indoor Variable Refrigerant Flow (VRF) units rated per ANSI/AHRI Standard 1230 shall be tested with refrigerant circulating through the evaporator. 4.6 Test Condition Tolerances. The allowable tolerances for sound ratings are as follows: Air temperature: 1.0 C Water temperature: 1.
46、0 C When the indoor-side loading is simulated by a method not requiring air, the following tolerances apply: Suction gas temperature at compressor: 3.0C Evaporator pressure: 14 kPa Note: Suction gas temperature at the compressor is applicable only when the suction gas superheat temperature is at lea
47、st 6.0 K in the equivalent Standard Rating test specified in the AHRI standard for the equipment being tested. 4.7 Test Method Measurement Reproducibility. Sound Power Levels obtained from either reverberant room or sound intensity methods made in conformance with this standard will result in measur
48、ement standard deviations which are equal to or less than those in Table 1. For the reverberation room method this table represents the uncertainty that would result from using ANSI/AHRI Standard 220 and a Reference Sound Source calibrated per ANSI/AHRI Standard 250. For the sound intensity method t
49、he uncertainties in this table include uncertainty in the sound intensity measurement due to the test environment, background noise levels and selection of measurement points as defined in ANSI/AHRI Standard 230. The standard deviations in Table 1 do not account for variations of sound power caused by changes in operating conditions. ANSI/AHRI STANDARD 350-2015 5 Table 1. Reproducibility in the Determination of Non-ducted Equipment Sound Power Levels Octave Band Center Frequency, Hz One-third Octave Band Center Frequency, Hz Maximum Standa
