Bryant 581A/B User Manual
Page 237
237
PERFORMANCE DATA (cont)
FAN PERFORMANCE — HORIZONTAL DISCHARGE UNITS (cont)
LEGEND
*Motor drive ranges:
Low Range: 805-1007
High Range: 941-1176
All other rpms require field-supplied drive.
Refer to page 230 for general Fan Performance Data notes.
NOTE: Maximum continuous bhp is:
Low Range: 5.75
High Range: 8.63
581A300 (25 TONS) (Low Heat Units)*
Airflow
(Cfm)
External Static Pressure (in. wg)
0.2
0.4
0.6
0.8
1.0
Rpm
Bhp
Watts
Rpm
Bhp
Watts
Rpm
Bhp
Watts
Rpm
Bhp
Watts
Rpm
Bhp
Watts
6,500
786
2,658
3.06
819
2,835
3.26
857
3,052
3.51
899
3,304
3.80
943
3,586
4.12
7,000
842
3,208
3.69
871
3,386
3.89
905
3,599
4.14
943
3,847
4.42
983
4,123
4.74
7,500
898
3,827
4.40
925
4,006
4.61
955
4,217
4.85
989
4,460
5.13
1026
4,733
5.44
8,000
955
4,518
5.20
979
4,699
5.40
1007
4,908
5.65
1037
5,148
5.92
1070
5,416
6.23
8,500
1012
5,284
6.08
1034
5,466
6.29
1059
5,675
6.53
1087
5,912
6.80
1117
6,176
7.10
9,000
1069
6,127
7.05
1090
6,312
7.26
1113
6,521
7.50
1138
6,757
7.77
1165
7,017
8.07
9,500
1127
7,050
8.11
1146
7,238
8.32
1167
7,448
8.57
1190
7,682
8.84
1215
7,940
9.13
10,000
1184
8,057
9.27
1202
8,247
9.49
1221
8,460
9.73
1243
8,693
10.00
1266
8,948
10.29
10,500
1242
9,149
10.52
1258
9,344
10.75
1276
9,557
10.99
1296
9,791
11.26
1318
10,046
11.55
11,000
1299
10,331
11.88
1315
10,529
12.11
1332
10,745
12.36
1350
10,979
12.63
1370
11,232
12.92
11,500
1357
11,604
13.35
1372
11,806
13.58
—
—
—
—
—
—
—
—
—
12,000
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
12,500
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
581A300 (25 TONS) (Low Heat Units)* (cont)
Airflow
(Cfm)
External Static Pressure (in. wg)
1.2
1.4
1.6
1.8
2.0
Rpm
Bhp
Watts
Rpm
Bhp
Watts
Rpm
Bhp
Watts
Rpm
Bhp
Watts
Rpm
Bhp
Watts
6,500
988
3,900
4.49
1035
4,248
4.89
1082
4,632
5.33
1129
5,050
5.81
1177
5,499
6.32
7,000
1024
4,428
5.09
1066
4,760
5.48
1109
5,124
5.89
1153
5,521
6.35
1197
5,950
6.84
7,500
1063
5,031
5.79
1102
5,354
6.16
1141
5,703
6.56
1181
6,081
6.99
1221
6,487
7.46
8,000
1105
5,709
6.57
1140
6,025
6.93
1176
6,364
7.32
1213
6,729
7.74
1250
7,116
8.18
8,500
1149
6,465
7.44
1181
6,777
7.79
1215
7,109
8.18
1249
7,463
8.58
1283
7,838
9.02
9,000
1194
7,302
8.40
1225
7,608
8.75
1256
7,935
9.13
1287
8,282
9.53
1319
8,649
9.95
9,500
1242
8,222
9.46
1270
8,524
9.80
1298
8,847
10.17
1328
9,189
10.57
1358
9,548
10.98
10,000
1290
9,227
10.61
1316
9,525
10.96
1343
9,845
11.32
1370
10,181
11.71
1399
10,536
12.12
10,500
1340
10,321
11.87
1364
10,617
12.21
1389
10,932
12.57
—
—
—
—
—
—
11,000
1391
11,505
13.23
—
—
—
—
—
—
—
—
—
—
—
—
11,500
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
12,000
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
12,500
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
Bhp
— Brake Horsepower Input to Fan
Watts — Input Watts to Motor
5
81A1
55-
30
0