112
PERFORMANCE DATA (cont)
FAN PERFORMANCE — VERTICAL DISCHARGE UNITS (cont)
LEGEND
*Motor drive range: 840 to 1085 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 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 513 0.54 505 595 0.76 713 665 1.01 940 728 1.27 1187 786 1.56 1453
2300 521 0.57 531 601 0.79 741 671 1.04 972 734 1.31 1222 791 1.60 1489
2400 535 0.63 584 615 0.86 802 684 1.11 1038 745 1.39 1293 802 1.68 1566
2500 551 0.69 642 628 0.93 866 696 1.19 1109 757 1.47 1369 813 1.77 1647
2550 558 0.72 673 635 0.97 900 702 1.23 1146 763 1.51 1409 818 1.81 1689
2600 566 0.76 705 642 1.00 935 709 1.27 1183 769 1.55 1450 824 1.86 1732
2700 582 0.83 771 656 1.08 1008 721 1.35 1263 781 1.65 1535 835 1.95 1823
2800 597 0.90 842 670 1.16 1086 734 1.44 1347 793 1.74 1625 847 2.06 1917
2900 613 0.98 918 684 1.25 1169 748 1.54 1436 805 1.84 1720 859 2.16 2019
3000 629 1.07 999 699 1.35 1256 761 1.64 1530 818 1.95 1820 871 2.28 2125
3100 645 1.16 1085 713 1.45 1349 775 1.75 1630 831 2.06 1925 883 2.40 2235
3200 662 1.26 1176 728 1.55 1448 788 1.86 1734 844 2.18 2036 895 2.52 2352
3300 678 1.36 1272 743 1.66 1551 802 1.98 1845 857 2.31 2152 908 2.65 2475
3400 694 1.47 1374 758 1.78 1660 816 2.10 1961 870 2.44 2275 920 2.79 2603
3500 711 1.59 1482 773 1.90 1775 831 2.23 2082 884 2.58 2402 — — —
3600 727 1.71 1596 789 2.03 1896 845 2.37 2210 897 2.72 2537 — — —
3700 744 1.84 1716 804 2.17 2023 860 2.51 2343 911 2.87 2677 — — —
3750 752 1.91 1778 812 2.24 2089 867 2.59 2413 — — — — — —
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 839 1.86 1735 889 2.18 2032 935 2.52 2345 980 2.87 2673 — — —
2300 844 1.90 1773 893 2.22 2073 940 2.56 2389 — — — — — —
2400 854 1.99 1855 903 2.32 2159 950 2.66 2478 — — — — — —
2500 865 2.08 1940 913 2.41 2249 959 2.76 2573 — — — — — —
2550 870 2.13 1985 918 2.46 2296 964 2.81 2622 — — — — — —
2600 875 2.18 2031 923 2.51 2344 969 2.87 2673 — — — — — —
2700 886 2.28 2126 934 2.62 2445 — — — — — — — — —
2800 897 2.39 2227 944 2.73 2550 — — — — — — — — —
2900 908 2.50 2333 955 2.85 2661 — — — — — — — — —
3000 920 2.62 2443 — — — — — — — — — — — —
3100 931 2.75 2560 — — — — — — — — — — — —
3200 943 2.88 2682 — — — — — — — — — — — —
3300 ———————————————
3400 ———————————————
3500 ———————————————
3600 ———————————————
3700 ———————————————
3750 ———————————————
Bhp — Brake Horsepower Input to Fan
Watts — Input Watts to Motor
581B036-150