115
PERFORMANCE DATA (cont)
FAN PERFORMANCE — VERTICAL DISCHARGE UNITS (cont)
LEGEND
*Motor drive range: 860 to 1080 rpm. All other rpms require field- sup-
plied drive.
Refer to page 107 for general Fan Performance Data notes.
NOTES:
1. Boldface indicates field-supplied drive is required.
2. Maximum continuous bhp is 4.20.
581B102 (81/2 TONS) — HIGH-STATIC MOTOR (BELT DRIVE)*
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
2500 541 0.50 467 624 0.66 614 701 0.8 3 771 771 1.00 936 837 1.19 1109
2600 556 0.55 513 637 0.71 665 711 0.89 827 781 1.07 996 845 1.26 1173
2700 571 0.60 562 650 0.77 720 722 0.9 5 885 790 1.14 1059 854 1.33 1241
2800 586 0.66 615 663 0.83 777 734 1.0 2 948 800 1.21 1126 863 1.41 1312
2900 601 0.72 672 676 0.90 839 745 1.0 9 1014 811 1.28 1197 872 1.49 1387
3000 616 0.79 732 689 0.97 904 757 1.1 6 1083 821 1.36 1271 882 1.57 1465
3100 632 0.85 796 703 1.04 972 769 1.2 4 1157 832 1.45 1349 892 1.66 1548
3200 648 0.93 864 717 1.12 1045 782 1.32 1235 843 1.53 1431 902 1.75 1635
3300 663 1.00 936 731 1.20 1122 795 1.41 1316 855 1.63 1517 912 1.85 1725
3400 679 1.09 1012 745 1.29 1203 808 1.50 1402 867 1.72 1608 923 1.95 1820
3500 695 1.17 1092 760 1.38 1288 821 1.60 1492 879 1.83 1703 934 2.06 1920
3600 711 1.26 1177 774 1.48 1379 834 1.70 1587 891 1.93 1802 945 2.17 2024
3700 728 1.36 1266 789 1.58 1473 848 1.81 1686 904 2.04 1906 957 2.29 2132
3800 744 1.46 1361 804 1.69 1572 861 1.92 1790 916 2.16 2015 969 2.41 2246
3900 760 1.57 1460 819 1.80 1676 875 2.04 1899 929 2.28 2128 981 2.53 2364
4000 777 1.68 1563 834 1.91 1785 889 2.16 2012 942 2.41 2247 993 2.67 2487
4100 793 1.79 1672 850 2.04 1899 904 2.29 2132 956 2.54 2371 1006 2.80 2615
4200 810 1.92 1786 865 2.16 2018 918 2.42 2255 969 2.68 2499 1018 2.95 2748
4300 826 2.04 1906 880 2.30 2142 932 2.56 2385 983 2.82 2633 1031 3.10 2888
581B102 (81/2 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
2500 900 1.38 1289 959 1.58 1476 1015 1.7 9 1669 1069 2.00 1868 1121 2.22 2073
2600 907 1.46 1357 965 1.66 1548 1021 1.8 7 1745 1074 2.09 1948 1125 2.31 2158
2700 914 1.53 1429 972 1.74 1624 1027 1.9 6 1825 1079 2.18 2032 1130 2.41 2245
2800 922 1.61 1505 979 1.83 1704 1033 2.0 5 1909 1085 2.27 2120 1135 2.51 2337
2900 931 1.70 1584 986 1.92 1787 1040 2.1 4 1996 1091 2.37 2211 1141 2.61 2432
3000 939 1.79 1667 994 2.01 1874 1047 2.2 4 2087 1098 2.47 2307 1147 2.71 2532
3100 948 1.88 1753 1002 2.11 1965 1054 2.34 2183 1105 2.58 2406 1153 2.83 2635
3200 957 1.98 1844 1011 2.21 2060 1062 2.45 2283 1112 2.69 2510 1160 2.94 2743
3300 967 2.08 1939 1020 2.32 2160 1070 2.56 2386 1119 2.81 2618 1167 3.06 2855
3400 977 2.19 2039 1029 2.43 2264 1079 2.67 2494 1127 2.93 2730 1174 3.19 2971
3500 987 2.30 2143 1038 2.54 2372 1088 2.80 2607 1135 3.05 2847 1181 3.32 3092
3600 998 2.41 2251 1048 2.66 2485 1097 2.92 2724 1144 3.18 2968 1189 3.45 3218
3700 1008 2.54 2364 1058 2.79 2602 1106 3.05 2846 1152 3.32 3094 1198 3.59 3348
3800 1019 2.66 2482 1068 2.92 2725 1116 3.19 2972 1162 3.46 3226 1206 3.74 3484
3900 1031 2.79 2605 1079 3.06 2852 1126 3.33 3104 1171 3.61 3362 1215 3.89 3624
4000 1042 2.93 2733 1090 3.20 2984 1136 3.48 3241 1180 3.76 3503 1224 4.04 3770
4100 1054 3.07 2866 1101 3.35 3122 1146 3.63 3383 1190 3.91 3649 1233 4.20 3921
4200 1066 3.22 3004 1112 3.50 3264 1157 3.79 3530 1200 4.08 3801 —— —
4300 1078 3.38 3148 1123 3.66 3413 1167 3.95 3683 —— — —— —
Bhp — Brake Horsepower Input to Fan
Watts — Input Watts to Motor
581B036-150