263
PERFORMANCE DATA (cont)
FAN PERFORMANCE — HORIZONTAL DISCHARGE UNITS (cont)
LEGEND
*Motor drive ranges:
Low Range: 896-1227 (208/230 and 460-v), 863-1141 (575-v)
High Range: 1113-1414 (208/230 and 460-v), 1042-1285 (575-v)
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), 3.45 (575-v)
High Range: 5.75
581A210 (18 TONS) (Medium 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
3,500 645 1105 1.27 720 1329 1.53 788 1549 1.78 851 1767 2.03 910 1982 2.28
4,000 718 1454 1.67 785 1692 1.95 848 1926 2.22 906 2158 2.48 962 2388 2.75
4,500 792 1866 2.15 853 2117 2.43 911 2364 2.72 965 2609 3.00 1017 2583 2.97
5,000 867 2343 2.69 923 2605 3.00 977 2865 3.30 1027 2845 3.27 1076 3163 3.64
5,500 943 2889 3.32 995 3162 3.64 1044 3158 3.63 1092 3497 4.02 1138 3843 4.42
6,000 1019 3177 3.65 1067 3532 4.06 1113 3892 4.48 1158 4259 4.90 1201 4631 5.33
6,500 1096 3973 4.57 1141 4354 5.01 1184 4742 5.45 1226 5136 5.91 1267 5535 6.37
7,000 1173 4894 5.63 1215 5304 6.10 1256 5719 6.58 1295 6140 7.06 1334 6567 7.55
7,500 1250 5952 6.85 1290 6389 7.35 1328 6832 7.86 1366 7281 8.37 — — —
8,000 1328 7153 8.23 1365 7620 8.76 — — — — — — — — —
8,500 ———————————————
9,000 ———————————————
9,500 ———————————————
10,000 ———————————————
581A210 (18 TONS) (Medium 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
3,500 965 2195 2.53 1018 2181 2.51 1068 2442 2.81 1116 2708 3.11 1162 2979 3.43
4,000 1014 2364 2.72 1064 2644 3.04 1112 2930 3.37 1158 3221 3.70 1202 3517 4.05
4,500 1067 2882 3.31 1114 3187 3.67 1160 3498 4.02 1204 3814 4.39 1246 4135 4.76
5,000 1123 3489 4.01 1168 3820 4.39 1211 4156 4.78 1253 4497 5.17 1294 4844 5.57
5,500 1182 4194 4.82 1224 4551 5.23 1266 4913 5.65 1306 5280 6.07 1345 5652 6.50
6,000 1243 5008 5.76 1283 5391 6.20 1323 5779 6.65 1361 6172 7.10 1398 6569 7.56
6,500 1306 5939 6.83 1345 6349 7.30 1382 6763 7.78 — — — — — —
7,000 1371 6997 8.05 — — — — — — — — — — — —
7,500 ———————————————
8,000 ———————————————
8,500 ———————————————
9,000 ———————————————
9,500 ———————————————
10,000 ———————————————
Bhp — Brake Horsepower Input to Fan
Watts — Input Watts to Motor
581A155-300