Indoor Sound Power Levels (Horizontal Ducted Discharge) - York ZT SERIES Technical Manual

5167821-YTG-K-1118
Unit description/model
Test configuration
External static pressure (IWG)
Nominal airflow (CFM)
Octave band center frequency
(Hz)
63
125
250
500
1000
2000
4000
8000
1. These values have been accessed using a model of sound propagation from a point source into the hemispheric/free field. The dBA values
provided are to be used for reference only. Calculation of dBA values cover matters of system design and the fan manufacture has no way
of knowing the details of each system. This constitutes an exception to any specification or guarantee requiring a dBA value of sound data
in any other form than sound power level ratings

Indoor sound power levels (horizontal ducted discharge)

Unit description/model
Test configuration
External static pressure (IWG)
Nominal airflow (CFM)
Octave band center frequency
(Hz)
63
125
250
500
1000
2000
4000
8000
1. These values have been accessed using a model of sound propagation from a point source into the hemispheric/free field. The dBA values
provided are to be used for reference only. Calculation of dBA values cover matters of system design and the fan manufacture has no way
of knowing the details of each system. This constitutes an exception to any specification or guarantee requiring a dBA value of sound data
in any other form than sound power level ratings
100
0.4
4600
Full stage cooling operation Full stage cooling operation
1
(dB)
87
85
76
72
66
63
63
56
0.4
2600
Full stage cooling operation Full stage cooling operation
1
(dB)
84
76
70
66
62
60
58
52
ZT150
Vertical (bottom supply) ducted discharge
1.0
4400
Full stage cooling operation
1
(dB)
86
86
76
73
67
64
64
57
ZT078
Horizontal (side supply) ducted discharge
1.0
2400
Full stage cooling operation
1
(dB)
88
80
73
67
65
63
61
54
1.6
4200 4000
Full stage cooling operation
1
(dB) (dB)
86
88
78
74
69
66
65
58
1.6
2200 2000
Full stage cooling operation
1
(dB) (dB)
91
86
80
74
73
70
69
63
Johnson Controls Ducted Systems
2.0
1
87
89
78
74
69
66
66
59
2.0
1
93
90
85
79
80
75
75
69