Appendix C - Fan Performance - Carrier 50JC04-06 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 fil-
ters, unit casing and wet coils.
4. Factory options and accessories may effect static pressure
losses. Selection software is available, through your
salesperson, to help you select the best motor/drive com-
bination for your application.
5. The Fan Performance tables offer motor/drive recommenda-
tions. In cases when two motor/drive combinations would
work, the lower horsepower option is recommended.
APPENDIX C — FAN PERFORMANCE
GENERAL FAN PERFORMANCE NOTES
40
6. 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 (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.