28
Table 13—581B Outdoor Sound Power (Total Unit)
UNIT
ARI
RATING
OCTAVE BANDS
UNIT
RATING
(decibels)
63
125
250
500
1000
2000
4000
8000
036, 048
76
55.9
66.0
64.0
66.2
68.4
64.5
61.7
57.3
060, 072
80
59.1
68.9
68.7
71.9
74.0
68.9
65.7
59.0
LEGEND
ARI
--- Air Conditioning and Refrigeration Institute
Table 14—581C Outdoor Sound Power (Total Unit)
UNIT
ARI
RATING
A---
WEIGHTED
OCTAVEBANDS
UNIT
RATING
(decibels)
WEIGHTED
(db)
63
125
250
500
1000
2000
4000
8000
024---048
76
76
55.9
66.0
64.0
66.2
68.4
64.5
61.7
57.3
060
80
80
59.1
68.9
68.7
71.9
74.0
68.9
65.7
59.0
GENERAL FAN PERFORMANCE NOTES
1. Values include losses for filters, unit casing, and wet coils. See Table 11 and Fig. 38 for accessory/FIOP static pressure information.
2. Extensive motor and electrical testing on these units ensures that the full range of the motor can be utilized with confidence. Using the
fan motors up to the ratings shown will not result in nuisance tripping or premature motor failure. Unit warranty will not be affected.
See Tables 8 and 9 for additional information.
3. Use of a field-supplied motor may affect wire sizing. Contact your Bryant representative to verify.
4. Interpolation is permissible. Do not extrapolate.
Table 15—Fan Performance 581C 024 — Vertical Discharge Units; Standard Motor (Belt Drive)**
AIRFLOW
EXTERNAL STATIC PRESSURE (in. wg)
AIRFLOW
(Cfm)
0.1
0.2
0.4
0.6
0.8
1.0
(Cfm)
Rpm
Bhp
Rpm
Bhp
Rpm
Bhp
Rpm
Bhp
Rpm
Bhp
Rpm
Bhp
600
500
0.08
531
0.08
607
0.14
713
0.21
788
0.29
878
0.37
700
529
0.09
567
0.09
633
0.16
739
0.24
816
0.32
902
0.41
800
547
0.10
592
0.12
660
0.19
761
0.27
845
0.37
937
0.47
900
570
0.13
620
0.14
691
0.22
793
0.32
870
0.42
957
0.53
1000
599
0.15
650
0.16
717
0.26
818
0.36
894
0.47
981
0.58
581B
,C
