Airedale DeltaChill FreeCool 110kW - 1080kW - Manual (Page 25)

Chillers DELTACHILL
™
Chillers
25
Technical Manual :7022932_V1.9_11/2013
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 ISO9614 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 ISO9614 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
-9
-4
-8
-4