256
PERFORMANCE DATA (cont)
FAN PERFORMANCE — VERTICAL DISCHARGE UNITS (cont)
LEGEND
*Motor drive ranges:
Low Range: 949-1206
High Range: 941-1176
All other rpms require field-supplied drive.
Refer to page 262 for general Fan Performance Data notes.
NOTE: Maximum continuous bhp is:
Low Range: 5.75
High Range: 8.63
581A240 (20 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
5,000 590 1276 1.47 663 1516 1.74 727 1745 2.01 786 1968 2.26 840 2189 2.52
5,500 633 1579 1.82 703 1838 2.11 764 2084 2.40 820 2324 2.67 872 2560 2.94
6,000 677 1925 2.21 744 2203 2.53 803 2467 2.84 857 2723 3.13 907 2974 3.42
6,500 722 2317 2.67 786 2614 3.01 842 2896 3.33 894 3167 3.64 942 3434 3.95
7,000 767 2758 3.17 828 3073 3.53 883 3371 3.88 933 3660 4.21 979 3942 4.53
7,500 813 3250 3.74 871 3582 4.12 924 3897 4.48 972 4202 4.83 1017 4500 5.18
8,000 859 3795 4.36 915 4143 4.77 966 4475 5.15 1012 4797 5.52 1056 5110 5.88
8,500 906 4394 5.05 959 4759 5.47 1008 5107 5.87 1053 5445 6.26 1096 5774 6.64
9,000 952 5051 5.81 1004 5432 6.25 1051 5797 6.67 1095 6150 7.07 1136 6494 7.47
9,500 999 5767 6.63 1049 6163 7.09 1094 6544 7.53 1137 6913 7.95 1177 7272 8.36
10,000 1047 6544 7.53 1094 6956 8.00 1138 7352 8.46 1180 7736 8.90 1219 8111 9.33
581A240 (20 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
5,000 891 2408 2.77 940 2625 3.02 987 2843 3.27 1032 3060 3.52 1076 3277 3.77
5,500 921 2792 3.21 968 3024 3.48 1014 3255 3.74 1057 3485 4.01 1099 3716 4.27
6,000 954 3221 3.70 999 3467 3.99 1042 3711 4.27 1084 3955 4.55 1125 4198 4.83
6,500 988 3696 4.25 1032 3956 4.55 1073 4214 4.85 1114 4470 5.14 1153 4726 5.44
7,000 1024 4219 4.85 1066 4493 5.17 1106 4764 5.48 1145 5034 5.79 1183 5303 6.10
7,500 1060 4792 5.51 1101 5080 5.84 1140 5365 6.17 1178 5649 6.50 1215 5930 6.82
8,000 1098 5417 6.23 1138 5719 6.58 1176 6018 6.92 1213 6315 7.26 1249 6610 7.60
8,500 1137 6096 7.01 1175 6413 7.38 1212 6726 7.74 1248 7036 8.09 1283 7344 8.45
9,000 1176 6831 7.86 1214 7163 8.24 1250 7490 8.61 1285 7814 8.99 1319 8135 9.36
9,500 1216 7624 8.77 1253 7970 9.17 1288 8312 9.56 1322 8649 9.95 1355 8984 10.33
10,000 1256 8478 9.75 1292 8838 10.16 1327 9193 10.57 1360 9545 10.98 1393 9893 11.38
Bhp — Brake Horsepower Input to Fan
Watts — Input Watts to Motor