Appendix C - Fan Performance - Carrier 50FC 04 Series Service And Maintenance Instructions

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 mod-
els, the user must deduct low and medium heat static pres-
sures. Selection software is available, through your
salesperson, to help you select the best motor/drive combi-
nation for your application.
5. The fan performance tables offer motor/drive recommen-
dations. In cases when 2 motor/drive combinations would
work, Carrier recommends the lower horsepower option.
APPENDIX C — FAN PERFORMANCE
GENERAL FAN PERFORMANCE NOTES
64
6. For information on the electrical properties of Carrier
motors, please see the Electrical information section of the
product data book for this model and size.
7. For more information on the performance limits of Carrier
motors, see the application data section of the product data
book for this model and size.
8. The EPACT (Energy Policy Act of 1992) regulates energy
requirements for specific types of indoor fan motors.
Motors regulated by EPACT include any general purpose,
T-frame (3-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.