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PERFORMANCE DATA (cont)
FAN PERFORMANCE — HORIZONTAL DISCHARGE UNITS (cont)
LEGEND
*Motor drive range: 860 to 1080 rpm. All other rpms require field-supplied
drive.
See page 103 for general fan performance notes.
NOTES:
1. Boldface indicates field-supplied drive is required.
2. Maximum continuous bhp is 4.20.
581B102 (8
1
/
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 513 0.45 423 603 0.62 576 682 0.78 732 753 0.96 892 817 1.13 1055
2600 526 0.50 463 614 0.67 621 692 0.84 783 761 1.02 948 825 1.20 1117
2700 539 0.54 505 625 0.72 670 702 0.90 837 770 1.08 1008 834 1.27 1182
2800 552 0.59 551 637 0.77 721 712 0.96 894 780 1.15 1070 842 1.34 1250
2900 565 0.64 599 648 0.83 775 722 1.02 954 789 1.22 1136 851 1.42 1321
3000 579 0.70 651 660 0.89 832 732 1.09 1017 799 1.29 1204 860 1.50 1395
3100 592 0.76 706 672 0.96 893 743 1.16 1083 808 1.37 1276 869 1.58 1471
3200 606 0.82 764 684 1.03 957 754 1.24 1153 818 1.45 1351 878 1.66 1552
3300 620 0.88 825 696 1.10 1024 765 1.31 1225 829 1.53 1429 888 1.75 1636
3400 634 0.95 890 709 1.17 1095 777 1.40 1302 839 1.62 1511 897 1.85 1723
3500 648 1.03 958 721 1.25 1169 788 1.48 1381 850 1.71 1597 907 1.95 1815
3600 662 1.10 1030 734 1.34 1246 800 1.57 1465 860 1.81 1686 917 2.05 1909
3700 676 1.19 1106 747 1.42 1328 811 1.66 1552 871 1.91 1779 927 2.15 2008
3800 690 1.27 1185 760 1.52 1414 823 1.76 1644 882 2.01 1876 938 2.26 2111
3900 705 1.36 1269 773 1.61 1503 835 1.86 1739 894 2.12 1977 948 2.38 2217
4000 719 1.45 1357 786 1.71 1597 848 1.97 1838 905 2.23 2082 959 2.50 2328
4100 734 1.55 1449 799 1.82 1695 860 2.08 1942 917 2.35 2192 970 2.62 2443
4200 748 1.66 1545 813 1.93 1797 872 2.20 2050 928 2.47 2305 981 2.75 2562
4300 763 1.76 1646 826 2.04 1903 885 2.32 2162 940 2.60 2423 992 2.88 2686
581B102 (8
1
/
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 877 1.31 1222 933 1.49 1392 986 1.68 1565 1037 1.87 1742 1085 2.06 1921
2600 885 1.38 1289 940 1.57 1464 993 1.76 1643 1043 1.96 1824 1091 2.15 2008
2700 892 1.46 1359 948 1.65 1540 1000 1.85 1723 1049 2.05 1909 1097 2.25 2099
2800 900 1.54 1432 955 1.74 1618 1007 1.94 1807 1056 2.14 1998 1103 2.35 2192
2900 908 1.62 1508 963 1.82 1699 1014 2.03 1893 1063 2.24 2089 1110 2.45 2289
3000 917 1.70 1587 970 1.91 1784 1021 2.13 1983 1070 2.34 2185 1117 2.56 2389
3100 925 1.79 1670 979 2.01 1872 1029 2.23 2076 1077 2.45 2283 1123 2.67 2492
3200 934 1.88 1756 987 2.10 1963 1037 2.33 2172 1085 2.56 2384 1131 2.79 2599
3300 943 1.98 1845 995 2.21 2057 1045 2.44 2272 1092 2.67 2490 1138 2.91 2710
3400 952 2.08 1939 1004 2.31 2156 1053 2.55 2376 1100 2.79 2599 1145 3.03 2824
3500 961 2.18 2035 1013 2.42 2258 1062 2.66 2483 1108 2.91 2711 1153 3.15 2942
3600 971 2.29 2135 1022 2.53 2364 1070 2.78 2595 1116 3.03 2827 1161 3.29 3063
3700 981 2.40 2240 1031 2.65 2473 1079 2.91 2709 1125 3.16 2948 1169 3.42 3189
3800 990 2.52 2348 1040 2.77 2587 1088 3.03 2828 1133 3.30 3073 1177 3.56 3319
3900 1000 2.64 2459 1050 2.90 2705 1097 3.17 2951 1142 3.43 3201 1186 3.70 3452
4000 1011 2.76 2576 1059 3.03 2826 1106 3.30 3079 1151 3.58 3334 1194 3.85 3591
4100 1021 2.89 2697 1069 3.17 2953 1116 3.44 3210 1160 3.72 3471 1203 4.00 3733
4200 1031 3.03 2822 1079 3.31 3083 1125 3.59 3347 1169 3.87 3612 1212 4.16 3880
4300 1042 3.16 2951 1089 3.45 3218 1135 3.74 3487 1179 4.03 3758 —— —
Bhp — Brake Horsepower Input to Fan
Watts — Input Watts to Motor
581B036-150