Operating instructions

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SOUND POWER AND SOUND PRESSURE LEVELS
AIR FL
OWS
MODEL m³/s MODEL m³/s
CXE 40
0.61
CKC 20
0.81
CXE 50
0.66
CKC 40
0.72
CXE 70
0.58
CKC 60
0.78
INDOOR UNIT
MAXIMUM SOUND POWER LEVELS
SPEED Frequency Hz
SOUND PRESSURE
LEVELS
125 250 500 1K 2K 4K dB
(
A
)
NC
CXE 40
69.1 67.7 67.6 65.6 62.2 56.0 55 48
CXE 50
71.7 69.2 69.1 67.1 63.2 58.5 56 50
CXE 70
70.1 68.2 68.6 66.1 63.2 57.5 56 49
Sound Power Levels were obtained in full accordance with the direct method of BS EN ISO3174:2000. Levels are shown in dB
with a standard reference of 1 pW.
Sound Pressure Levels in dB(A) refer to semi-hemispherical radiation (wall or ceiling mounted) at a distance of 1.5m from the
front of the unit, with the fan operating at full speed.
OUTDOOR UNIT
MAXIMUM SOUND POWER LEVELS
SPEED Frequency Hz
SOUND PRESSURE
LEVELS
125 250 500 1K 2K 4K dB
(
A
)
NC
CKC 20
77 67 69 65 60 54 49 44
CKC 40
77 67 69 65 61 54 49 44
CKC 60
73 68 68 66 62 54 50 45
Sound Power Levels were obtained in full accordance with the direct method of ISO 3741: 1988. Levels are shown in dB with a
standard reference of 1 pW.
Sound Pressure Levels in dB(A) refer to semi-hemispherical radiation (wall or floor mounted) at a distance of 3m from
the front of the unit, with the fan operating at full speed; (add 3dBA or 3NC for units at an intersection of a wall, add 1dBA
or 1NC for high level wall mounted units).