Sound data, Measurement of sound data, Storemaster ™ comfort – Airedale StoreMaster 50kW - 77kW User Manual
Page 36
STOREMASTER
™
Comfort
36
Comfort Range
Technical Manual : 6678403 V1.3.0_ 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.
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 hemispherical method
according to BS EN ISO11203 : 1996.
SOUND DATA
Split System - Evaporator Section Only - DX (Mechanical) Cooling - Case Breakout
Sound
Measurement
Overall
dB(A)
Frequency (Hz) dB
63
125
250
500
1000
2000
4000
8000
STM50
Power
72
54
71
73
69
69
62
54
47
Pressure
@ 10m
44
26
43
45
41
41
34
26
19
STM77
Power
74
55
73
74
72
70
63
55
51
Pressure
@ 10m
46
27
45
46
44
42
35
27
23
Split System- Condenser Section Only - DX (Mechanical) Cooling - Case Breakout
Sound
Measurement
Overall
dB(A)
Frequency (Hz) dB
63
125
250
500
1000
2000
4000
8000
STM50
Power
78
52
65
68
71
73
73
66
55
Pressure
@ 10m
50
24
37
40
43
45
45
38
27
STM77
Power
78
52
65
68
71
73
73
66
55
Pressure
@ 10m
50
24
37
40
43
45
45
38
27
Packaged System - DX (Mechanical) Cooling - Case Breakout
Sound
Measurement
Overall
dB(A)
Frequency (Hz) dB
63
125
250
500
1000
2000
4000
8000
STM50
Power
79
56
72
74
73
74
73
66
56
Pressure
@ 10m
51
28
44
46
45
46
45
38
28
STM77
Power
79
57
74
75
75
75
73
66
56
Pressure
@ 10m
51
29
46
47
47
47
45
38
28
In-Duct Sound Data
Sound
Measurement
Overall
dB(A)
Frequency (Hz) dB
63
125
250
500
1000
2000
4000
8000
STM50
Return air power
83
77
77
80
77
78
78
74
67
Supply air power
78
72
85
83
74
71
68
64
60
STM77
Return air power
79
75
77
79
77
73
70
66
61
Supply air power
83
76
87
84
77
77
74
70
70
1
dB(A) is the overall sound level, measured on the A scale.
2
Above sound levels are with the condenser fan running at full speed.
3
Return air sound levels are based on nominal design air volume with maximum external static pressure 75Pa
2
Supply air sound levels are based on nominal design air volume with maximum external static pressure 250Pa
The Sound Pressure data quoted is only valid in free field conditions, where the unit is installed on a reflective base. If
the equipment is placed adjacent to a reflective wall, values may vary to those stated, typically increasing by 3dB for
each side added.