Danfoss DSH Series Application Guide

Sound and vibration data
Typical sounds and vibrations in systems can be broken down into the following three categories:
• Sound radiation (through air)
• Mechanical vibrations (through parts and structure)
• Gas pulsation (through refrigerant)
The following sections focus on the causes and methods of mitigation for each of the above sources.
Compressor sound radiation - Single
For sound radiating from the compressors, the emission path is air and the sound waves are travelling directly from
the machine in all directions.
Table 11: Compressor sound radiation (R410A Max. DGT 135°C)
Compressor model
50 Hz
60 Hz
Acoustic hood
code number
Sound power dB(A)
Attenuation dB(A)
(1)
Sound power dB(A)
Attenuation dB(A)
(1)
DSH090
73
6
76
6
120Z0034
DSH105
75
6
78
6
102Z0035
DSH120
75
6
78
6
120Z0035
DSH140
76
6
79
6
120Z0035
DSH161
76
6
79
6
120Z0035
DSH184
78
6
81
6
120Z0135
DSH240
82
6
85
4
120Z0022
DSH295
82
6
85
4
120Z0022
DSH381
89
6
91
4
120Z0022
120Z0579
(2)
DSH485
(3)
89
4
91
4
120Z0022
(1)
Attenuation given with acoustic hood
(2)
For DSH381code 3
(3)
No acoustic hood available for DSH485 code 3
(1)
Attenuation given with acoustic hood
(2)
For DSH381code 3
(3)
No acoustic hood available for DSH485 code 3
Table 12: Compressor sound radiation(R452B/R454B Max. DGT 150°C)
Compressor model
50 Hz
60 Hz
Acoustic hood code number
Sound power dB(A)
Attenuation dB(A)
(1)
Sound power dB(A)
Attenuation dB(A)
(1)
Body
Top
DSH090
73
4
76
4
120Z0490
120Z0493
DSH105
75
4
78
5
120Z0491
120Z0493
DSH120
75
4
78
5
120Z0491
120Z0493
DSH140
76
4
79
5
120Z0491
120Z0493
DSH161
76
4
79
5
120Z0491
120Z0493
DSH184
78
5
81
6
120Z0492
120Z0493
DSH240
82
5
85
4
120Z0768
-
DSH295
82
5
85
4
120Z0768
-
DSH381
(2)
89
4
91
4
120Z0768
-
DSH485
(2)
89
4
91
4
120Z0768
-
DSH600
91
4
93
4
120Z0851
-
(1)
Attenuation given with acoustic hood
(2)
No acoustic hood available for DSH381code 3 and DSH485 code3
(1)
Attenuation given with acoustic hood
(2)
No acoustic hood available for DSH381code 3 and DSH485 code3

NOTE:
Sound power and attenuation are given at ARI conditions, measured in free space
For compressors running simultaneously,
- The global sound level of “n” identical compressors is:
L
GLOBAL
=Li+10  Log
10
 n
Example for the trio
Scroll compressors, DSH090 to DSH600 | Sound and vibration data
© Danfoss | Climate Solutions | 2022.10 AB288965961751en-001402 | 16

Danfoss DSH Series Specifications

General

Brand	Danfoss
Model	DSH Series
Category	Air Compressor
Language	English