246653-YTG-E-0108
Johnson Controls Unitary Products
79
NOTES:Basic Unit = cooling only, 10hp FC fan.
+ Econ = +235lb
+ Heat = single stage gas, 180 lb
+ Power Exhaust = modulating 7.5hp
Sound Power Ratings for Supply Air Blowers in our Millen-
nium Units with High Gas Heat, Economizer, 2: T/A Filters
and Wet DX Sound power calculations complements of Lau’s
revised “Whirlwind” application selection software for air mov-
ing components.
The sound ratings above occur at the blower wheel. To deter-
mine the sound rating at a unit’s supply and return air duct
connection, subtract the attenuation factors listed below.
NOTE:
These values have been accessed using a model of
sound propagation from a point source into the
hemispheric free field (AMCA 303-79). The dBA val-
ues provided are to be used for reference only. Cal-
culation of dBA values cover matters of system
design, and the fan manufacturer has no way of
knowing the details of each system. This constitutes
an exception to any specification or guarantee
requiring a dBA value or sound data in any other
form than sound power level ratings.
TABLE 61: UNIT CORNERWEIGHT
UNIT
DESCRIPTION
25 TON
30 TON
40 TON
A
B
C
D
A
B
C
D
A
B
C
D
B
ASIC
U
NIT
870
949
1352
1239
930
972
1360
1303
969
969
1454
1454
B
ASIC
U
NIT
W
ITH
E
CONOMIZER
1018
1111
1313
1203
1076
1124
1328
1272
1058
1058
1482
1482
B
ASIC
U
NIT
W
ITH
E
CONOMIZER
AND
G
AS
OR
E
LECTRIC
H
EAT
994
1084
1418
1300
1073
1073
1403
1403
1102
1055
1503
1570
B
ASIC
U
NIT
W
ITH
E
CONOMIZER
AND
G
AS
OR
E
LECTRIC
H
EAT
AND
P
OWER
E
XHAUST
1220
1275
1318
1262
1275
1275
1410
1410
1335
1278
1485
1551
TABLE 62: INDOOR SOUND POWER RATING
M
ODEL
N
UMBER
CFM
ESP
B
LOWER
S
OUND
P
OWER
(
D
B 10-12 W
ATTS
)
OCTAVE BAND CENTERLINE FREQUENCY (H
Z
)
DBA
IWG
RPM
BHP
63
125
250
500
1000
2000
4000
8000
Y32
10,000
1.5
750
7.5
90
88
85
85
80
78
74
68
87
Y33
12750
1.5
840
12.8
93
91
88
88
83
81
77
71
90
Y34
17500
1.3
800
20
95
92
89
89
84
83
78
72
91
TABLE 63: ATTENUATION FACTORS
L
OCATION
O
CTAVE
B
AND
C
ENTERLINE
F
REQUENCY
(H
Z
)
63
125
250
500
1000
2000
4000
8000
S
OUND
A
TTENUATION
(
D
B
12
W
ATTS
)
S
UPPLY
A
IR
11
13
18
10
21
21
23
23
R
ETURN
A
IR
13
15
22
23
25
25
29
29
TABLE 64: OUTDOOR SOUND POWER RATING
M
ODEL
O
CTAVE
B
AND
C
ENTERLINE
F
REQUENCY
(H
ERTZ
)
db(A)
65
125
250
500
1000
2000
4000
8000
S
OUND
P
OWER
L
EVEL
,
DB
(10)-12 W
ATTS
Y32
88
91
89
86
82
79
76
72
88
Y33
87
90
88
86
82
80
77
73
88
Y34
88
91
89
86
82
80
77
73
88
