82
NOTE: Do not adjust pulley further than 5 turns open.
GENERAL FAN PERFORMANCE NOTES
1. Interpolation is permissible. Do not extrapolate.
2. External static pressure is the static pressure difference between the return duct and the supply duct plus the static pressure
caused by any FIOPs or accessories.
3. Tabular data accounts for pressure loss due to clean filters, unit casing, wet coils, and highest gas heat exchanger (when gas heat
unit).
4. Factory options and accessories may effect static pressure losses. Gas heat unit fan tables assume highest gas heat models; for
fan selections with low or medium heat models, the user must deduct low and medium heat static pressures. Selection software
is available, through your salesperson, to help you select the best motor/drive combination for your application.
5. The fan performance tables offer motor/drive recommendations. In cases when two motor/drive combinations would work,
Bryant recommends the lower horsepower option.
6. For information on the electrical properties of Bryant motors, please see the Electrical information section of this book.
7. For more information on the performance limits of Bryant motors, see the application data section of this book.
8. The EPACT (Energy Policy Act of 1992) regulates energy requirements for specific types of indoor fan motors. Motors regu-
lated by EPACT include any general purpose, T-frame (three-digit, 143 and larger), single-speed, foot mounted, polyphase,
squirrel cage induction motors of NEMA (National Electrical Manufacturers Association) design A and B, manufactured for use
in the United States. Ranging from 1 to 200 Hp, these continuous-duty motors operate on 230 and 460 volt, 60 Hz power. If a
motor does not fit into these specifications, the motor does not have to be replaced by an EPACT compliant energy-efficient
motor. Variable-speed motors are exempt from EPACT compliance requirements.
Table L — Pulley Adjustment (Horizontal) - Fan RPM at Motor Pulley Settings
MODEL SIZE
MOTOR/DRIVE
COMBO
MOTOR PULLEY TURNS OPEN
0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
17
3-phase
Standard Static 680 663 647 630 614 597
580 564 547 531 514
Medium Static 780 763 747 730 714 697
680 664 647 631 614
High Static 912 895 879 862 846 829
812 796 779 763 746
20
3-phase
Standard Static 822 802 782 762 742 722
702 682 662 642 622
Medium Static 879 862 846 829 813 796
779 763 746 730 713
High Static 1021 1002 984 965 947 928
909 891 872 854 835
24
3-phase
Standard Static 863 846 828 811 794 777
759 742 725 707 690
Medium Static 1021 1002 984 965 947 928
909 891 872 854 835
High Static 1176 1153 1129 1106 1082 1059
1035 1012 988 965 941
28
3-phase
Standard Static 791 777 762 748 733 719
705 690 676 661 647
Medium Static 923 906 889 873 856 839
822 805 789 772 755
High Static 1107 1087 1067 1047 1027 1007
986 966 946 926 906
Factory settings
APPENDIX C — FAN PERFORMANCE
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