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PERFORMANCE DATA — 581C
LEGEND *Motor drive range: 1075 to 1455 rpm. All other rpms require field-
supplied drive.
Refer to page 107 for general Fan Performance Data notes.
FAN PERFORMANCE — VERTICAL DISCHARGE UNITS (cont)
LEGEND
*Motor drive range: 1035 to 1460 rpm. All other rpms require field-supplied drive.
Refer to page 107 for general Fan Performance Data notes.
NOTES:
1. Boldface indicates field-supplied drive is required.
2. Maximum continuous bhp is 1.30.
581C048 (4 TONS) — HIGH-STATIC MOTOR (BELT DRIVE)* (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
1200 1093 0.77 767 1155 0.87 861 1213 0.96 955 1268 1.05 1047 1321 1.14 1137
1300 1119 0.87 866 1181 0.98 970 1239 1.08 1073 1294 1.18 1175 1346 1.28 1275
1400 1147 0.98 972 1208 1.09 1086 1265 1.21 1199 1320 1.32 1310 1371 1.43 1419
1500 1175 1.09 1086 1235 1.22 1209 1292 1.34 1332 1346 1.46 1452 1397 1.58 1572
1600 1204 1.21 1207 1263 1.35 1340 1320 1.48 1472 1373 1.61 1603 1424 1.74 1732
1700 1233 1.34 1336 1292 1.49 1480 1348 1.63 1622 1401 1.77 1762 1451 1.91 1901
1800 1262 1.48 1473 1321 1.64 1627 1376 1.79 1779 1428 1.94 1930 1479 2.09 2078
1900 1293 1.63 1620 1350 1.79 1784 1405 1.96 1946 1457 2.12 2106 1506 2.28 2265
2000 1323 1.79 1776 1380 1.96 1950 1434 2.13 2123 1486 2.31 2293 ———
Bhp — Brake Horsepower
Watts — Input Watts to Motor
581C060 (5 TONS) — STANDARD MOTOR (BELT DRIVE)* — SINGLE-PHASE 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
1500 848 0.42 371 968 0.55 486 1069 0.68 600 1158 0.80 715 1238 0.94 831
1600 887 0.49 433 1004 0.63 556 1103 0.76 678 1190 0.90 800 1269 1.04 922
1700 927 0.57 502 1040 0.71 633 1137 0.86 763 1223 1.00 892 1302 1.15 1022
1800 967 0.65 579 1077 0.81 718 1172 0.96 856 1257 1.12 993 1334 1.27 1130
1900 1007 0.75 663 1115 0.91 811 1208 1.08 957 1291 1.24 1101 — — —
2000 10480.8575711531.0391312441.201066——————
2100 10900.9785911911.151023—————————
2200 1131 1.09 970 1230 1.29 1143 —————————
2300 11731.231091————————————
2400 ———————————————
2500 ———————————————
581C060 (5 TONS) — STANDARD MOTOR (BELT DRIVE)* — SINGLE-PHASE 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
1500 1312 1.07 948 1380 1.20 1067 —————————
1600 13421.181047————————————
1700 13741.301153————————————
1800 ———————————————
1900 ———————————————
2000 ———————————————
2100 ———————————————
2200 ———————————————
2300 ———————————————
2400 ———————————————
2500 ———————————————
Bhp — Brake Horsepower
Watts — Input Watts to Motor
581C060 (5 TONS) — STANDARD MOTOR (BELT DRIVE)* — THREE-PHASE 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
1500 848 0.42 371 968 0.55 486 1069 0.68 600 1158 0.80 715 1238 0.94 831
1600 887 0.49 433 1004 0.63 556 1103 0.76 678 1190 0.90 800 1269 1.04 922
1700 927 0.57 502 1040 0.71 633 1137 0.86 763 1223 1.00 892 1302 1.15 1022
1800 967 0.65 579 1077 0.81 718 1172 0.96 856 1257 1.12 993 1334 1.27 1130
1900 1007 0.75 663 1115 0.91 811 1208 1.08 957 1291 1.24 1101 1368 1.40 1246
2000 1048 0.85 757 1153 1.03 913 1244 1.20 1066 1326 1.37 1219 1401 1.54 1371
2100 1090 0.97 859 1191 1.15 1023 1281 1.33 1185 1361 1.51 1345 1435 1.69 1505
2200 1131 1.09 970 1230 1.29 1143 1318 1.48 1313 1397 1.67 1481 1470 1.86 1649
2300 1173 1.23 1091 1269 1.43 1273 1355 1.63 1451 1433 1.83 1627 1505 2.03 1803
2400 1215 1.38 1223 1309 1.59 1413 1393 1.80 1600 1470 2.01 1784 1540 2.21 1967
2500 1258 1.54 1365 1349 1.76 1564 1431 1.98 1759 1506 2.20 1951 ———