Sound Power And Sound Pressure Levels - Marstair CXE Series Technical Manual

MODEL
CXE 30
CXE 50
CXE 70

SOUND POWER AND SOUND PRESSURE LEVELS

INDOOR UNIT
MAXIMUM
SPEED
CXE 30
SPEED
CXE 50
CXE 70
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
SPEED
CKC 50
CKC 80 SPEED
CKC 90
CKC 100
CKC 130
CKC 165
CKC 150
CKC 180
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).
AIR FLOWS
MODEL
m³/s
CKC 50
0.61
CKC 80
0.66
CKC 90
0.58
CKC 100
CKC 130
CKC 150
CKC 165
CKC 180
SOUND POWER LEVELS
Frequency Hz
125 250 500 1K
69.1 67.7 67.6 65.6
71.7 69.2 69.1 67.1
70.1 68.2 68.6 66.1
SOUND POWER LEVELS
Frequency Hz
125 250 500 1K
74 68 67 66
71 69 68 65
82 72 69 69
79 74 72 69
73 70 70 69
73 70 70 69
73 70 70 69
73 72 72 69
m³/s
0.97
0.97
0.97
0.97
1.85
1.85
1.85
1.85
SOUND PRESSURE
2K 4K dB(A)
62.2 56.0 55
63.2 58.5 56
63.2 57.5 56
SOUND PRESSURE
2K 4K dB(A)
61 54 49
60 54 49
63 57 52
64 58 53
65 57 52
66 58 57
66 58 57
66 58 59
5
LEVELS
NC
48
50
49
LEVELS
NC
44
43
47
47
47
51
51
53
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