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7 - POSITIONING AND INSTALLATION
7.4 Sound level
These units are designed to work with a low acoustic level. In any case, the following must be taken into account for the design
of the installation: the outdoor environment for acoustic radiation, the type of building for the noise transmitted by air, the solid
elements for the transmission of vibrations.
To reduce transmission through solid surfaces to the maximum, it is very advisable to install shock absorbers between the ground
or structure and the unit frame. If necessary, a study must be commissioned to an acoustic technician.
Note: The acoustic insulating cover for compressor (optional) achieves a sound level reduction of approximately 2 dB(A).
Sound power level (LW)
Sound pressure level (LP)
Measurement conditions: in a clear fi eld, measured at a distance of 10 meters, directivity 2 and at 1,5 meters from the ground.
Package unit
Split unit: Outdoor module
Split unit: Indoor module
Sound power level in the indoor fan supply to be taken into account for the silencer calculation:
50NC series 022 028 038 042 058 064 074 086 106 118
63 Hz
Coming soon
57 60 62 62 59 69
Coming soon
125 Hz 66 75 72 72 74 72
250 Hz 74 74 79 78 76 77
500 Hz 81 81 83 84 82 82
1000 Hz 84 84 85 85 86 86
2000 Hz 84 84 82 83 84 84
4000 Hz 77 77 78 78 77 78
8000 Hz 68 72 72 72 69 73
Total dB(A) 88 89 89 89 90 90
50NC series 022 028 038 042 058 064 074 086 106 118
63 Hz
Coming soon
54 57 59 59 56 66
Coming soon
125 Hz 63 72 69 69 71 69
250 Hz 71 71 76 75 73 74
500 Hz 78 78 80 81 79 79
1000 Hz 81 81 82 82 83 83
2000 Hz 81 81 79 80 81 81
4000 Hz 74 74 75 75 74 75
8000 Hz 65 69 69 69 66 70
Total dB(A) 83 83 86 86 87 87
50NC series 022 028 038 042 058 064 074 086 106 118
63 Hz
Coming soon
72 75 71 70 72 76
Coming soon
125 Hz 68 71 67 67 69 72
250 Hz 69 72 69 70 71 75
500 Hz 73 76 73 73 77 78
1000 Hz 73 76 73 74 75 78
2000 Hz 69 72 69 70 72 75
4000 Hz 63 66 63 64 66 69
8000 Hz 56 59 55 57 60 63
Total dB(A) 79 82 79 79 82 84
Package unit
Split unit: Outdoor module
50NC series 022 028 038 042 058 064 074 086 106 118
Total dB(A) Coming soon 55 55 56 57 57 57 Coming soon
50NC series 022 028 038 042 058 064 074 086 106 118
Total dB(A) Coming soon 53 53 55 55 55 55 Coming soon
Note: The sound pressure level depends on the installation conditions and, as such, it only indicated as a guide. Values obtained according to the
ISO 3744 standard.
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