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PERFORMANCE DATA — 581C
LEGEND *Motor drive range: 1075 to 1455 rpm. All other rpms require field-
supplied drive. See page 107 for general fan performance notes.
NOTES:
1. Boldface indicates field-supplied drive is required.
2. Maximum continuous bhp is 2.40.
FAN PERFORMANCE — HORIZONTAL DISCHARGE UNITS (cont)
LEGEND
*Motor drive range: 1035 to 1460 rpm. All other rpms require field-
supplied drive.
See page 107 for general fan performance 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 1089 0.84 837 1153 0.98 974 1213 1.12 1115 1270 1.27 1262 1324 1.42 1413
1300 1113 0.92 915 1177 1.06 1058 1237 1.21 1205 1293 1.36 1358 1347 1.52 1514
1400 1138 1.01 1000 1201 1.15 1149 1261 1.31 1303 1317 1.47 1461 1370 1.63 1623
1500 1163 1.10 1092 1226 1.25 1247 1285 1.41 1407 1341 1.58 1571 1394 1.75 1740
1600 1189 1.20 1191 1252 1.36 1353 1310 1.53 1520 1365 1.70 1690 1418 1.87 1865
1700 1216 1.31 1299 1277 1.48 1468 1335 1.65 1640 1390 1.83 1817 1442 2.01 1998
1800 1242 1.42 1414 1303 1.60 1590 1361 1.78 1770 1415 1.96 1953 1467 2.15 2140
1900 1270 1.55 1538 1330 1.73 1721 1387 1.92 1908 1441 2.11 2098 1493 2.30 2292
2000 1297 1.68 1672 1357 1.87 1862 1414 2.07 2055 1467 2.26 2252 ———
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 800 0.39 350 904 0.49 438 999 0.60 535 1087 0.72 640 1169 0.85 753
1600 839 0.46 412 938 0.57 505 1030 0.68 605 1115 0.80 714 1195 0.93 829
1700 879 0.54 483 974 0.65 580 1062 0.77 684 1144 0.90 796 1221 1.03 914
1800 919 0.63 561 1010 0.75 663 1095 0.87 771 1174 1.00 886 1250 1.14 1008
1900 960 0.73 648 1047 0.85 754 1129 0.98 867 1206 1.11 986 1279 1.25 1111
2000 1001 0.84 744 1085 0.96 855 1163 1.09 972 1238 1.23 1095 — — —
2100 1043 0.96 850 1123 1.09 965 1199 1.22 1086 ——————
2200 1085 1.09 966 1162 1.22 1086 —————————
2300 1127 1.23 1092 — — — —————————
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 1247 0.98 873 1320 1.13 1002 1390 1.28 1137
——————
1600 1270 1.07 952 1342 1.22 1083 —————————
1700 1295 1.17 1040 — — — —————————
1800 13211.281137————————————
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 800 0.39 350 904 0.49 438 999 0.60 535 1087 0.72 640 1169 0.85 753
1600 839 0.46 412 938 0.57 505 1030 0.68 605 1115 0.80 714 1195 0.93 829
1700 879 0.54 483 974 0.65 580 1062 0.77 684 1144 0.90 796 1221 1.03 914
1800 919 0.63 561 1010 0.75 663 1095 0.87 771 1174 1.00 886 1250 1.14 1008
1900 960 0.73 648 1047 0.85 754 1129 0.98 867 1206 1.11 986 1279 1.25 1111
2000 1001 0.84 744 1085 0.96 855 1163 1.09 972 1238 1.23 1095 1309 1.38 1224
2100 1043 0.96 850 1123 1.09 965 1199 1.22 1086 1271 1.37 1213 1340 1.52 1346
2200 1085 1.09 966 1162 1.22 1086 1235 1.36 1211 1305 1.51 1342 1372 1.67 1479
2300 1127 1.23 1092 1201 1.37 1217 1272 1.52 1347 1340 1.67 1482 1405 1.83 1623
2400 1169 1.38 1229 1241 1.53 1359 1310 1.68 1493 1375 1.84 1633 1439 2.00 1778
2500 1212 1.55 1378 1281 1.70 1513 1348 1.86 1652 1412 2.02 1796 1473 2.19 1945