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PERFORMANCE DATA (cont)
FAN PERFORMANCE — VERTICAL DISCHARGE UNITS (cont)
LEGEND
*Motor drive ranges:
Low Range: 647-886 (208/230 and 460-v), 810-1072 (575-v)
High Range: 897-1139 (208/230 and 460-v), 873-1108 (575-v)
All other rpms require field-supplied drive.
Refer to page 262 for general Fan Performance Data notes.
NOTE: Maximum continuous bhp is:
Low Range: 4.25 (208/230 and 460-v), 3.45 (575-v)
High Range: 5.75
581A210 (18 TONS) (Low Heat Units)*
Airflow
(Cfm)
Available External Static Pressure (in. wg)
0.2 0.4 0.6 0.8 1.0
Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp
3500 460 591 0.68 548 774 0.89 623 951 1.09 692 1126 1.29 755 1301 1.50
4000 499 774 0.89 581 976 1.12 653 1170 1.35 717 1361 1.56 777 1551 1.78
4500 538 990 1.14 617 1212 1.39 685 1423 1.64 746 1630 1.88 803 1835 2.11
5000 579 1243 1.43 654 1485 1.71 719 1715 1.97 778 1938 2.23 832 2158 2.48
5500 621 1536 1.77 693 1798 2.07 755 2045 2.35 811 2285 2.63 864 2520 2.90
6000 664 1871 2.15 732 2152 2.48 792 2417 2.78 846 2673 3.07 897 2925 3.36
6500 707 2250 2.59 772 2550 2.93 830 2834 3.26 883 3106 3.57 932 3373 3.88
7000 751 2676 3.08 813 2994 3.44 869 3295 3.79 920 3585 4.12 967 3868 4.45
7500 795 3150 3.62 855 3487 4.01 909 3805 4.38 958 4112 4.73 1004 4411 5.07
8000 839 3676 4.23 897 4029 4.63 949 4366 5.02 997 4689 5.39 1042 5004 5.75
8500 884 4253 4.89 940 4625 5.32 990 4978 5.73 1037 5318 6.12 1080 5649 6.50
581A210 (18 TONS) (Low Heat Units)* (cont)
Airflow
(Cfm)
Available External Static Pressure (in. wg)
1.2 1.4 1.6 1.8 2.0
Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp
3500 814 1476 1.70 871 1650 1.90 924 1825 2.10 975 1999 2.30 1023 2173 2.50
4000 834 1740 2.00 888 1930 2.22 939 2119 2.44 988 2308 2.65 1035 2497 2.87
4500 857 2039 2.35 909 2243 2.58 958 2446 2.81 1005 2650 3.05 1051 2853 3.28
5000 884 2376 2.73 933 2594 2.98 980 2811 3.23 1026 3028 3.48 1070 3244 3.73
5500 913 2753 3.17 960 2984 3.43 1006 3215 3.70 1049 3445 3.96 1092 3674 4.23
6000 945 3172 3.65 990 3417 3.93 1034 3662 4.21 1076 3905 4.49 1117 4147 4.77
6500 978 3636 4.18 1022 3895 4.48 1064 4153 4.78 1104 4409 5.07 1144 4665 5.37
7000 1012 4145 4.77 1055 4419 5.08 1095 4691 5.39 1135 4960 5.70 1173 5229 6.01
7500 1047 4703 5.41 1089 4992 5.74 1128 5277 6.07 1167 5561 6.40 1204 5842 6.72
8000 1084 5311 6.11 1124 5615 6.46 1163 5915 6.80 1200 6211 7.14 1236 6506 7.48
8500 1121 5972 6.87 1160 6290 7.23 1198 6604 7.60 1234 6914 7.95 1269 7223 8.31
Bhp — Brake Horsepower Input to Fan
Watts — Input Watts to Motor
581A155-300