Airedale OptiChill FreeCool 500kW - 1365kW - Manual (Page 37)

Chillers OPTICHILL
™
Chillers
37
Technical Manual : 6530166 V1.6.0 02_2013
Sound Data
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 ISO11203 : 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, specific directional sound power levels
can be derived from the global sound power data.
Base Correction Values
- Global dB
-9
-4
-8
-4
EXAMPLE:
OPC600HED10
Overall Sound Power
= 97 dB(A) ie:
93dB(A)
89dB(A)
93dB(A)
88dB(A)