5167821-YTG-K-1118
Johnson Controls Ducted Systems
89
Indoor sound power levels (vertical ducted inlet, standard static belt drive)
Unit description/model
ZT037 / 3 ton / standard static belt drive
Test configuration
Vertical (bottom return) ducted inlet
Indoor blower speed (RPM)
609 - 3 turns open equivalent
708 - 1 turn open equivalent
External static pressure (IWG)
0.4
0.4
Airflow (CFM)
850
1150
Blower motor BHP
0.32
0.38
Octave center freq. Hz
ID blower only (dB)
Cooling operation
1
(dB)
1. Differentials for cooling operation (IDB, COMP, & ODF) are logarithmically calculated from the horizontal flow sound test.
• Tested in accordance with AHRI Standard 260-2001. Refer to 2001 Standard for Sound Rating of Ducted Air Moving and Conditioning
Equipment.
• Testing datum includes effect of standard inlet air filters.
• Test duct dimension: 18 in. wide x 28 in. high x 8 ft. long, no elbows.
• Test duct termination is flush with reverberant room wall.
• Duct end (sound reflection) corrections included: (7.2, 3.4, 1.2, 0.4, 0.1, 0, 0, 0) dB at (63, 125, 250, 500, 1k, 2k, 4k, 8k) Hz respectively.
ID blower only (dB)
Cooling operation
1
(dB)
63
76
76
74
76
125
63
70
66
70
250
55
62
59
62
500
54
55
58
59
1000
48
48
53
53
2000
44
44
48
48
4000
41
44
45
46
8000
42
43
43
44
Unit description/model
ZT049 / 4 ton / standard static belt drive
Test configuration
Vertical (bottom return) ducted inlet
Indoor blower speed (RPM)
609 - 3 turns open equivalent
708 - 1 turn open equivalent
External static pressure (IWG)
0.4
0.4
Airflow (CFM)
850
1150
Blower motor BHP
0.32
0.38
Octave center freq. Hz
ID blower only (dB)
Cooling operation
1
(dB)
1. Differentials for cooling operation (IDB, COMP, & ODF) are logarithmically calculated from the horizontal flow sound test.
• Tested in accordance with AHRI Standard 260-2001. Refer to 2001 Standard for Sound Rating of Ducted Air Moving and Conditioning
Equipment.
• Testing datum includes effect of standard inlet air filters.
• Test duct dimension: 18 in. wide x 28 in. high x 8 ft. long, no elbows.
• Test duct termination is flush with reverberant room wall.
• Duct end (sound reflection) corrections included: (7.2, 3.4, 1.2, 0.4, 0.1, 0, 0, 0) dB at (63, 125, 250, 500, 1k, 2k, 4k, 8k) Hz respectively.
ID blower only (dB)
Cooling operation
1
(dB)
63
76
76
74
76
125
63
70
66
70
250
55
62
59
62
500
54
55
58
59
1000
48
48
53
53
2000
44
44
48
48
4000
41
44
45
46
8000
42
43
43
44
