Bryant PREFERRED 581J - Manual (Page 32)

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TABLE 18 – STATIC PRESSURE ADDERS (FACTORY OPTIONS AND/OR ACCESSORIES)
Economizer
3 --- 5 TONS
CFM (in. wg) 600 800 1000 1250 1500 1750 2000 2250 2500 2750 3000
Vertical
Economizer
0.01 0.02 0.04 0.05 0.07 0.09 0.12 0.15 0.18 0.22 0.26
Horizontal
Economizer
0.02 0.03 0.04 0.06 0.08 0.10 0.13 0.15 0.18 0.23 0.28
6 --- 8.5 TONS
CFM (in. wg) 1800 2000 2250 2500 2750 3000 3250 3500 3750 4000 4250 4500 4750 5000 5250 5500 5750 6000
Vertical
Economizer
0.04 0.05 0.06 0.08 0.09 0.12 0.13 0.15 0.17 0.20 0.22 0.25 0.29 0.33 0.36 0.40 0.44 0.48
Horizontal
Economizer
0.07 0.07 0.08 0.10 0.13 0.15 0.18 0.21 0.25 0.28 0.30 0.34 0.39 0.43 0.47 0.51 0.56 0.60
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, and wet coils. Factory options and accessories
may add static pressure losses, as shown in Table 24. Selection software is available, through your salesperson, to help
you select the best motor/drive combination for your application.
4. The Fan Performance tables offer motor/drive recommendations. In cases when two motor/drive combinations would
work, Bryant recommended the lower horsepower option.
5. For information on the electrical properties of Bryant motors, please see the Electrical information section of this
book.
6. For more information on the performance limits of Bryant motors, see the application data section of this book.
7. 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 require-
ments. Therefore, the indoor fan motors for Bryant 581J04--09 units are exempt from these requirements.
581J