124
PERFORMANCE DATA (cont)
FAN PERFORMANCE — HORIZONTAL DISCHARGE UNITS (cont)
LEGEND
*Motor drive range: 840 to 1085 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 2.90.
581B090 (71/2 TONS) — STANDARD 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 0.7 3 681 657 0.97 901 722 1.22 1142 782 1.50 1403
2300 513 0.55 509 592 0 .76 7 08 663 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 8 60 692 1.17 1095 754 1.45 1349 811 1.74 1623
2600 558 0.73 677 632 0 .96 8 94 698 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 831 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 870 2.46 2297 919 2.81 2616
3600 720 1.66 1543 777 1.95 1822 832 2.27 2116 883 2.60 2425 — — —
3700 736 1.78 1660 793 2.09 1944 846 2.41 2245 896 2.75 2560 — — —
3750 745 1.85 1721 801 2.15 2008 853 2.48 2312 903 2.82 2630 — — —
581B090 (71/2 TONS) — STANDARD 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 — — —
2300 842 1.84 1719 895 2.17 2019 944 2.51 2336 992 2.86 2669 — — —
2400 851 1.92 1793 903 2.25 2097 952 2.59 2416 — — — — — —
2500 860 2.01 1873 911 2.34 2180 960 2.68 2502 — — — — — —
2550 865 2.05 1914 916 2.38 2223 964 2.73 2547 — — — — — —
2600 869 2.10 1957 920 2.43 2267 968 2.78 2593 — — — — — —
2700 879 2.19 2046 929 2.53 2360 976 2.88 2689 — — — — — —
2800 889 2.29 2140 938 2.64 2458 — — — — — — — — —
2900 899 2.40 2239 948 2.75 2561 — — — — — — — — —
3000 910 2.51 2343 958 2.86 2670 — — — — — — — — —
3100 921 2.63 2453 — — — — — — — — — — — —
3200 932 2.75 2569 — — — — — — — — — — — —
3300 943 2.88 2690 — — — — — — — — — — — —
3400 ———————————————
3500 ———————————————
3600 ———————————————
3700 ———————————————
3750 ———————————————
Bhp — Brake Horsepower Input to Fan
Watts — Input Watts to Motor
581B036-150