Bryant 581A - Manual (Page 17)

AIR DELIVERY (cont)
581A240 (20 TON)
Airflow
(Cfm)
Standard Belt-Drive Motor
External Static Pressure (in. wg)
0.2 0.4 0.6 0.8 1.0
Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp
6000 800 1732 1.88 891 2047 2.22 975 2376 2.58 1055 2728 2.96 1133 3104 3.37
6500 853 2134 2.32 939 2471 2.68 1018 2819 3.06 1094 3185 3.46 1167 3573 3.88
7000 907 2596 2.82 989 2957 3.21 1064 3324 3.61 1136 3707 4.02 1205 4107 4.46
7500 962 3123 3.39 1039 3507 3.81 1111 3895 4.23 1179 4295 4.66 1245 4710 5.11
8000 1017 3717 4.04 1091 4126 4.48 1160 4536 4.93 1225 4954 5.38 1287 5386 5.85
8500 1072 4385 4.76 1143 4818 5.23 1209 5250 5.70 1271 5688 6.18 1332 6137 6.66
9000 1128 5129 5.57 1196 5587 6.07 1260 6042 6.56 1323 6501 7.06 1377 6968 7.57
9500 1185 5955 6.47 1250 6437 6.99 1311 6915 7.51 1369 7395 8.03 1424 7881 8.56
10000 1241 6865 7.45 1304 7372 8.00 1363 7873 8.65 1419 8376 9.09 1472 8882 9.64
581A240 (20 TON) (cont)
Airflow
(Cfm)
Standard Belt-Drive Motor
External Static Pressure (in. wg)
1.2 1.4 1.6 1.8 2.0
Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp
6000 1208 3504 3.80 1282 3926 4.26 1353 4368 4.74 1421 4826 5.24 1488 5299 5.75
6500 1239 3983 4.32 1308 4415 4.79 1376 4866 5.28 1442 5337 5.79 1507 5823 6.32
7000 1273 4529 4.92 1339 4970 5.40 1403 5432 5.90 1467 5911 6.42 1520 6339 6.88
7500 1309 5143 5.58 1372 5597 6.08 1434 6067 6.59 1494 6558 7.12 1548 7014 7.62
8000 1349 5833 6.33 1409 6297 6.84 1467 6779 7.36 1529 7313 7.94 — — —
8500 1390 6600 7.17 1447 7077 7.68 1504 7571 8.22 — — — — — —
9000 1433 7446 8.08 1488 7938 8.62 — — — — — — — — —
9500 1478 8378 9.10 — — — — — — — — — — — —
10000 1524 9396 10.20 — — — — — — — — — — — —
LEGEND
Bhp — Brake Horsepower Input to Fan
FIOP — Factory-Installed Option
Watts — Input Watts to Motor
NOTES:
1. Boldface indicates standard operating range.
2. All other numbers indicate field-supplied drive required.
3.
indicates maximum bhp/watts of standard motor and drive.
4. Factory shipped motor drive range is 1323 to 1579 rpm. Other rpms
require a field-supplied drive.
5. Static pressure losses (i.e., economizer) must be added to external
static pressure before entering Air Delivery table. See page 18 for
accessory/FIOP static pressure information.
6. Interpolation is permissible. Do not extrapolate.
7. Maximum continuous bhp is 10.2 for 208/230-v units and 11.8 for
460-v units. The maximum continuous watts are 9510 for the 208/
230-v units and 11,000 for the 460-v unit. Extensive motor and drive
testing on these units ensures that the full horsepower range of the
motor can be utilized with confidence. Using your fan motors up to
the wattage ratings shown will not result in nuisance tripping or pre-
mature motor failure. Unit warranty will not be affected.
NOTE: The 389210-201, 389211-201 high static regain
adapter accessories may be used to provide horizontal
supply/return. NOTE: The 389210-201, 389211-201 horizontal supply/
return adapter accessories improve 581A fan perfor-
mance by increasing external static pressure by amount
shown above.
Horizontal Supply/Return Fan Performance
With 389210-201 or 389211-201 High Static Regain Adapter
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