5167821-YTG-J-0518
Johnson Controls Ducted Systems
43
Indoor Sound Power Levels (Vertical Ducted Inlet, High Static Belt Drive)
UNIT DESCRIPTION / MODEL
ZT037 / 3 Ton / High Static Belt Drive
TEST CONFIGURATION
Vertical (Bottom Return) Ducted Inlet
Indoor Blower Speed (RPM)
927 - 3 Turns Open Equivalent
1,085 - 1/2 Turn Open Equivalent
1,190 - 2.5 Turns Open Equivalent
1
1. Requires driven pulley #AK-56, normal high static pulley is an #AK-69.
External Static Pressure (IWG)
1.0
1.6
2.0
1
Nominal Airflow (CFM)
1,200
1,100
1,000
Blower Motor BHP
0.68
0.93
1.09
Octave Center Freq. Hz
ID Blower
Only (dB)
Cooling
Operation
2
(dB)
2. 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
2
(dB)
ID Blower
Only (dB)
Cooling
Operation
2
(dB)
63
77
79
82
83
79
81
125
68
69
70
71
72
73
250
60
67
62
69
64
67
500
58
58
63
63
62
63
1000
54
55
60
60
60
60
2000
48
49
56
56
55
55
4000
43
44
48
49
51
51
8000
44
44
45
46
47
47
UNIT DESCRIPTION / MODEL
ZT049 / 4 Ton / High Static Belt Drive
TEST CONFIGURATION
Vertical (Bottom Return) Ducted Inlet
Indoor Blower Speed (RPM)
968 - 5.5 Turns Open Equivalent
1,120 - 3.5 Turns Open Equivalent
1,218 - 2.0 Turns Open Equivalent
External Static Pressure (IWG)
1.0
1.6
2.0
Nominal Airflow (CFM)
1,600
1,400
1,200
Blower Motor BHP
0.86
1.03
1.13
Octave Center Freq. Hz
ID Blower
Only (dB)
Cooling
Operation
1
(dB)
ID Blower
Only (dB)
Cooling
Operation
1
(dB)
ID Blower
Only (dB)
Cooling
Operation
1
(dB)
63
77
79
78
78
81
81
125
69
73
71
73
73
74
250
63
63
63
64
66
66
500
63
64
62
63
64
64
1000
59
59
59
59
61
61
2000
54
54
53
54
56
56
4000
49
49
48
48
50
51
8000
45
46
45
46
47
47
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.
