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PERFORMANCE DATA (cont)
FAN PERFORMANCE — VERTICAL DISCHARGE UNITS (cont)
LEGEND
*Motor drive ranges:
Low Range: 805-1007
High Range: 941-1176
All other rpms require field-supplied drive.
Refer to page 261 for general Fan Performance Data notes.
NOTE: Maximum continuous bhp is:
Low Range: 5.75
High Range: 8.63
581A300 (25 TONS) (Low Heat Units)*
Airflow
(Cfm)
Available 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
6,500 750 2,468 2.84 806 2,767 3.18 854 3,031 3.49 898 3,298 3.79 943 3,584 4.12
7,000 797 2,942 3.38 853 3,276 3.77 899 3,557 4.09 941 3,832 4.41 982 4,118 4.74
7,500 845 3,468 3.99 900 3,840 4.42 945 4,142 4.76 985 4,430 5.09 1024 4,721 5.43
8,000 892 4,045 4.65 948 4,462 5.13 991 4,789 5.51 1030 5,092 5.86 1067 5,391 6.20
8,500 939 4,677 5.38 995 5,141 5.91 1038 5,497 6.32 1076 5,818 6.69 1112 6,129 7.05
9,000 986 5,364 6.17 1042 5,882 6.76 1085 6,269 7.21 1122 6,611 7.60 1157 6,936 7.98
9,500 1033 6,108 7.03 1090 6,684 7.69 1132 7,105 8.17 1169 7,470 8.59 1203 7,813 8.99
10,000 1079 6,911 7.95 1137 7,550 8.68 1180 8,007 9.21 1216 8,399 9.66 1249 8,761 10.08
10,500 1126 7,773 8.94 1184 8,480 9.75 1227 8,978 10.33 1263 9,399 10.81 1296 9,782 11.25
11,000 1172 8,696 10.00 1232 9,475 10.90 1274 10,017 11.52 1310 10,468 12.04 1342 10,876 12.51
11,500 1219 9,681 11.13 1279 10,539 12.12 1322 11,127 12.80 1357 11,611 13.35 — — —
12,000 1265 10,732 12.34 1326 11,669 13.42 — — — — — — — — —
12,500 1311 11,848 13.63 — — — — — — — — — — — —
581A300 (25 TONS) (Low Heat Units)* (cont)
Airflow
(Cfm)
Available 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
6,500 988 3,900 4.49 1035 4,250 4.89 1082 4,634 5.33 1130 5,053 5.81 1177 5,499 6.32
7,000 1024 4,426 5.09 1066 4,760 5.48 1109 5,126 5.90 1153 5,524 6.35 1197 5,953 6.85
7,500 1063 5,026 5.78 1101 5,351 6.15 1141 5,702 6.56 1181 6,081 6.99 1222 6,490 7.46
8,000 1104 5,698 6.55 1140 6,020 6.92 1176 6,361 7.32 1213 6,727 7.74 1251 7,118 8.19
8,500 1146 6,443 7.41 1180 6,765 7.78 1214 7,103 8.17 1249 7,459 8.58 1283 7,837 9.01
9,000 1190 7,259 8.35 1222 7,586 8.73 1255 7,925 9.11 1287 8,276 9.52 1319 8,645 9.94
9,500 1235 8,148 9.37 1266 8,483 9.76 1296 8,824 10.15 1327 9,176 10.55 1357 9,541 10.97
10,000 1280 9,111 10.48 1310 9,456 10.88 1340 9,804 11.28 1369 10,158 11.68 1398 10,522 12.10
10,500 1326 10,147 11.67 1355 10,505 12.08 1384 10,862 12.49 — — — — — —
11,000 1372 11,259 12.95 — — — — — — — — — — — —
11,500 —— ——— ——— ——— ——— —
12,000 —— ——— ——— ——— ——— —
12,500 —— ——— ——— ——— ——— —
Bhp — Brake Horsepower Input to Fan
Watts — Input Watts to Motor
581A155-300