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Chapter 15.0 Sound and Power Specifications
15.1 TTS300 and TTS400 Sound Power Measurements
The sound power levels on the TTS300 and TTS400 compressors are measured in compliance with ISO 9614-1 (1993)
and are given in decibels and in A-scale dB(A).
Three series of sound power measurements were performed on the unit while in two (2) different modes:
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For TTS400:
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15.1.1 Results
The sound power measured under each operational mode is presented in Table 15-1 Sound Power Measurements
for TTS300
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These tables present the results of sound pressure calculations for various distances while the compressor is
installed on top of a building.
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Below are the results from "Sound Power Measurements"on a Turbocor TTS300 compressor.
Table 15-1 Sound Power Measurements for TTS300
Operation Mode
Sound Power (A-Scale) dBA
250 kW
81.5
315 kW
86
Table 15-2 Sound Pressure Calculation for TTS300
Distance in Relation to Compressor (Meters)
1
1.5
3
5
8
For TTS300: 250kW (70 ton) refrigeration capacity
315kW (90 ton) refrigeration capacity
420kW (120 ton) refrigeration capacity
525kW (150 ton) refrigeration capacity
Table 15-1 Sound Power Measurements for TTS300
Table 15-2 Sound Pressure Calculation for TTS300
Table 15-4 Sound Power Measurements for TTS400
Table 15-5 Sound Pressure Calculation for TTS400
The sound data below should be used as a guide only.
The following sound measurements are based on a specific physical setup, such as suction/discharge
piping, evaporator and condensers, as well as specific pressure ratios. Any OEM system design would
not necessarily match these conditions.
OEMs are responsible for their system sound level measurements and their published data.
Sound Power (Linear Scale) dB
81.5
85.5
Operational Mode of Compressor (Capacity)
250 kW (70 Ton) dBA
73.5
70.0
64
59.5
55.5
M-AP-001-EN Rev. S-9/8/2021 Page 91 of 136
Dominant Frequency
1070 Hz
1180 Hz
315 kW (90 Ton) dBA
78.0
70.0
68.5
64.0
60.0
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