Airedale DeltaChill FreeCool 110kW - 1080kW - Manual (Page 52)

52 Chiller Technical Manual 7267818 V1.4.0_04_2014
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Chillers DeltaChill™ Air Cooled and FreeCool
Measurement of Sound Data
All sound data quoted has been measured in the third-octave band limited values, using a Real Time Analyser calibrated
sound intensity meter in accordance with BS EN ISO 9614 Part 1:1995. The Global sound data quoted is valid for noise
emitted in the horizontal plane in all directions.
All Sound Power Levels quoted are calculated from measured sound intensity according to BS EN ISO 9614 Part 1:
1995.
Sound Pressure Levels are calculated from sound power using the expanded parallelepiped method according to BS
EN ISO 11203: 1996.
Sound Directivity
The Global sound measurements quoted in the following tables do not incorporate any directivity or denote any sound
level heard at any given position surrounding the unit, rather they represent the total sound level radiating from the unit
in all directions in the horizontal plane from source.
Using the adjustment factors from the map below, directional sound power levels can be derived from the global sound
power data.
Base Correction Values - Global dB
-11
-4
-11
-4
Design Data