125
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 107 for general fan performance notes.
NOTES:
1. Boldface indicates field-supplied drive is required.
2. Maximum continuous bhp is 4.20.
581B090 (71/2 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
2250 505 0.52 484 586 0.73 681 657 0.97 901 722 1.22 1142 782 1.50 1403
2300 513 0.55 509 592 0.76 708 663 1.00 931 727 1.26 1174 787 1.54 1437
2400 527 0.60 561 605 0.82 766 674 1.07 993 738 1.33 1241 796 1.62 1508
2500 543 0.66 617 618 0.89 828 686 1.14 1060 748 1.41 1312 806 1.70 1583
2550 550 0.69 647 625 0.92 860 692 1.17 1095 754 1.45 1349 811 1.74 1623
2600 558 0.73 677 632 0.96 894 698 1.21 1131 759 1.49 1388 816 1.78 1664
2700 574 0.80 742 645 1.03 964 710 1.29 1207 770 1.58 1469 826 1.88 1749
2800 589 0.87 811 659 1.11 1039 723 1.38 1287 782 1.67 1554 837 1.97 1839
2900 605 0.95 885 673 1.20 1119 736 1.47 1372 794 1. 76 1644 848 2.07 1933
3000 621 1.03 963 688 1.29 1204 749 1.57 1463 806 1.87 1740 859 2.18 2033
3100 637 1.12 1046 702 1.39 1293 762 1.67 1558 818 1.97 1840 871 2.29 2139
3200 654 1.22 1135 717 1.49 1388 776 1.78 1658 8 31 2.09 1946 882 2.41 2249
3300 670 1.32 1228 732 1.60 1488 789 1.89 1764 843 2.21 2057 894 2.54 2365
3400 686 1.42 1328 747 1.71 1593 803 2.01 1876 856 2.33 2174 907 2.67 2488
3500 703 1.54 1433 762 1.83 1705 817 2.14 1993 8 70 2.46 2297 919 2.81 2616
3600 720 1.66 1543 777 1.95 1822 832 2.27 2116 8 83 2.60 2425 932 2.95 2750
3700 736 1.78 1660 793 2.09 1944 846 2.41 2245 8 96 2.75 2560 944 3.10 2889
3750 745 1.85 1721 801 2.15 2008 853 2.48 2312 9 03 2.82 2630 951 3.18 2962
581B090 (71/2 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
2250 838 1.81 1683 891 2.12 1981 941 2.46 2297 988 2.82 2629 1033 3.19 2976
2300 842 1.84 1719 895 2.17 2019 944 2.51 2336 992 2.86 2669 1037 3.24 3018
2400 851 1.92 1793 903 2.25 2097 952 2.59 2416 999 2.95 2752 1043 3.33 3104
2500 860 2.01 1873 911 2.34 2180 960 2.68 2502 1006 3.05 2842 1051 3.43 3196
2550 865 2.05 1914 916 2.38 2223 964 2.73 2547 1010 3.10 2888 1054 3.48 3243
2600 869 2.10 1957 920 2.43 2267 968 2.78 2593 1014 3.15 2935 1058 3.53 3292
2700 879 2.19 2046 929 2.53 2360 976 2.88 2689 1022 3.25 3035 1066 3.64 3395
2800 889 2.29 2140 938 2.64 2458 985 2.99 2791 1030 3.37 3140 1073 3.76 3503
2900 899 2.40 2239 948 2.75 2561 994 3.11 2898 1039 3.49 3250 1082 3.88 3616
3000 910 2.51 2343 958 2.86 2670 1004 3.23 3011 1048 3.61 3366 1090 4.01 3736
3100 921 2.63 2453 968 2.98 2783 1013 3.35 3128 1057 3.74 3488 1099 4.14 3861
3200 932 2.75 2569 978 3.11 2903 1023 3.49 3252 1066 3.88 3616 — — —
3300 943 2.88 2690 989 3.25 3029 1033 3.63 3382 1076 4.02 3749 — — —
3400 954 3.02 2816 1000 3.39 3159 1044 3.77 3518 1086 4.17 3889 —— —
3500 966 3.16 2950 1011 3.54 3297 1054 3.92 3660 — — — — — —
3600 978 3.31 3088 1022 3.69 3442 1065 4.08 3808 — — — — — —
3700 990 3.47 3233 1034 3.85 3591 — — — — — — — — —
3750 996 3.55 3308 1040 3.93 3669 — — — — — — — — —
Bhp — Brake Horsepower Input to Fan
Watts — Input Watts to Motor
581B036-150