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581A155-300
PERFORMANCE DATA (cont)
FAN PERFORMANCE — HORIZONTAL DISCHARGE UNITS (cont)
LEGEND
*Motor drive ranges:
Low Range: 896-1227 (208/230 and 460-v), 873-1108 (575-v)
High Range: 1113-1414
All other rpms require field-supplied drive.
Refer to page 261 for general Fan Performance Data notes.
NOTE: Maximum continuous bhp is:
Low Range: 4.25 (208/230 and 460-v), 5.75 (575-v)
High Range: 5.75
581A240 (20 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
3,500 642 1082 1.24 714 1296 1.49 781 1510 1.74 843 1726 1.98 901 1943 2.23
4,000 714 1426 1.64 780 1651 1.90 841 1877 2.16 898 2103 2.42 952 2330 2.68
4,500 787 1831 2.11 847 2067 2.38 904 2303 2.65 957 2540 2.92 1008 2501 2.88
5,000 862 2301 2.65 917 2547 2.93 969 2793 3.21 1019 2755 3.17 1066 3062 3.52
5,500 937 2838 3.26 988 3094 3.56 1036 3067 3.53 1083 3390 3.90 1127 3719 4.28
6,000 1013 3113 3.58 1060 3445 3.96 1105 3783 4.35 1149 4130 4.75 1191 4484 5.16
6,500 1089 3893 4.48 1133 4250 4.89 1175 4615 5.31 1216 4986 5.73 1256 5364 6.17
7,000 1166 4798 5.52 1207 5181 5.96 1247 5570 6.41 1285 5965 6.86 1323 6369 7.32
7,500 1243 5837 6.71 1282 6244 7.18 1319 6658 7.66 1355 7080 8.14 1391 7507 8.63
8,000 1320 7017 8.07 1356 7450 8.57 1392 7890 9.08 — — — — — —
8,500 1398 8350 9.60 — — — — — — — — — — — —
9,000 ———————————————
9,500 ———————————————
10,000 ———————————————
581A240 (20 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
3,500 955 2160 2.48 1007 2142 2.46 1056 2409 2.77 1104 2684 3.09 1149 2968 3.41
4,000 1004 2299 2.64 1053 2578 2.96 1100 2865 3.29 1145 3160 3.63 1189 3463 3.98
4,500 1056 2793 3.21 1103 3093 3.56 1147 3402 3.91 1191 3718 4.28 1233 4041 4.65
5,000 1112 3376 3.88 1156 3699 4.25 1199 4029 4.63 1240 4366 5.02 1280 4710 5.42
5,500 1171 4057 4.67 1212 4402 5.06 1253 4754 5.47 1292 5114 5.88 1331 5480 6.30
6,000 1232 4845 5.57 1271 5213 6.00 1310 5588 6.43 1348 5970 6.87 1384 6358 7.31
6,500 1295 5749 6.61 1333 6141 7.06 1369 6538 7.52 — — — — — —
7,000 1360 6778 7.80 1396 7193 8.27 — — — — — — — — —
7,500 ———————————————
8,000 ———————————————
8,500 ———————————————
9,000 ———————————————
9,500 ———————————————
10,000 ———————————————
Bhp — Brake Horsepower Input to Fan
Watts — Input Watts to Motor