Carrier 38AUZ Spécifications télécharger pdf (Page 46)

Acoustic Summary For CU-1,2

Project: ~Untitled65 05/30/2014

Prepared By: 03:47PM

Outdoor Unit Parameters:

Tag Name:

CU-1,2

Unit Model:

38AUD

Unit Size:

20 Tons

System Type:

Dx Cooling Only

Refrigerant Type:

PURON

Compressor Quantity:

Compressor Type:

Scroll

Advanced Accoustics Parameters

1. Unit height above ground:

1.0

2. Horizontal distance from unit to receiver:

20.0

3. Receiver height above ground:

5.7

4. Height of obstruction:

0.0

5. Horizontal distance from obstruction to receiver:

0.0

6. Horizontal distance from unit to obstruction:

0.0

Detailed Acoustics Information

Octave Band Center Frequency, Hz 63 125 250 500 1k 2k 4k 8k Overall

Sound Power Levels at Unit's Acoustic Center (Lw), dB 91.0 85.0 80.0 86.0 79.0 73.0 68.0 63.0 93.4

A-Wgted Sound Power Levels at Unit's Acoustic Center (LwA), dBA 64.8 68.9 71.4 82.8 79.0 74.2 69.0 61.9 85.2

Sound Press. Levels at Dist. Specified above (Lp), dB 66.3 60.3 55.3 61.3 54.3 48.3 43.3 38.3 68.7

A-Wgted Sound Press. Levels at Dist. Specified above (LpA), dBA 40.1 44.2 46.7 58.1 54.3 49.5 44.3 37.2 60.5

Calculation methods used in this program are patterned after the ASHRAE Guide; other ASHRAE Publications and the AHRI

Acoustical Standards. While a very significant effort has been made to insure the technical accuracy of this program, it is assumed

that the user is knowledgeable in the art of system sound estimation and is aware of the tolerances involved in real world acoustical

estimation. This program makes certain assumptions as to the dominant sound sources and sound paths which may not always be

appropriate to the real system being estimated. Because of this, no assurances can be offered that this software will always generate

an accurate sound prediction from user supplied input data. If in doubt about the estimation of expected sound levels in a space, an

Acoustical Engineer or a person with sound prediction expertise should be consulted.

Acoustic Note:

1. 38ARZ, 38ARS and 38ARD012 sound power data is tested in accordance with ARI270-95 Sound Rating of Unitary Equipment.

2. 38ARD014-024 and 38AKS data is estimated sound power levels. It is based upon a limited amount of actual testing with the

estimated sound power data being generated from this data in accordance with ARI Standard 370 for large outdoor refrigerating and

air-conditioning equipment.

3. The indoor duct sound power data is estimated based on the ASHRAE calculation approach from the ASHRAE handbook 1987

HVAC Systems & Applications, Chapter 52.

4. The acoustic center of the unit is located at the geometric center of the unit.

5. All estimated sound power levels, dB re 1 Picowatt should not be guaranteed or certified as being the actual sound power levels.

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Carrier 38AUZ Spécifications Page 46

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