77
Boldface indicates an alternated standard static drive package is
required.
BLACK indicates an operation point covered by high static. Confirm
max BHP coverage based on the unit voltage.
NOTE: Fan tables include highest gas heat.
Table F — 581J 20 Vertical Supply (17.5 Tons)
CFM
AVAILABLE EXTERNAL STATIC PRESSURE (IN. WG)
0.2 0.4 0.6 0.8 1.0
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
5250 547 1.10
626 1.45 700 1.84 766 2.24 828 2.67
5700 581 1.35
655 1.72 724 2.12 789 2.55 849 3.00
6150 615 1.63
684 2.02 750 2.44 812 2.90 871 3.37
6550
646 1.92 711 2.32 774 2.77 834 3.24 891 3.73
7000
682 2.28 743 2.71 803 3.17 860 3.66 915 4.17
7450
718 2.70 775 3.14 832 3.62 887 4.13 940 4.67
7900
755 3.16 809 3.62 863 4.12 915 4.65 966 5.21
8300
787 3.62 839 4.09 891 4.61 941 5.16 990 5.73
8750
825 4.18 874 4.68 923 5.22 971 5.78 1018 6.38
CFM
AVAILABLE EXTERNAL STATIC PRESSURE (IN. WG)
1.2 1.4 1.6 1.8 2.0
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
5250
885 3.11 939 3.57 990 4.05 1038 4.54 1084 5.04
5700
905 3.47 958 3.95 1008 4.45 1055 4.96 1100 5.48
6150
925 3.86 977 4.36 1026 4.88 1073 5.42 1118 5.96
6550
945 4.24 995 4.76 1043 5.30 1090 5.86 1134 6.42
7000
967 4.71 1017 5.26 1064 5.82 1109 6.39 ——
7450
991 5.22 1039 5.79 1085 6.38 ————
7900
1015 5.78 1062 6.38 ——————
8300
1038 6.33 ————————
8750 ——————————
Standard static 622-822 RPM, 3.7 BHP max
Medium static 713-879 RPM, 4.9 BHP max
High static 882-1078 RPM
Voltage 208v / 230v / 460v / 575v
Max BHP 6.5 / 6.9 / 7.0 / 8.3
APPENDIX C — FAN PERFORMANCE
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