55
0
1000
2000
3000
4000
5000
6000
0 0.1 0.2 0.3 0.4
RETURN DUCT STATIC PRESSURE DROP (in. wg)
Vertical Economizers
C101123
Fig. 22 -- Return Air Pressure Drop--Vertical 15 To ns
0
500
1000
1500
2000
2500
0 0.1 0.2 0.3 0.4 0.5
STATIC PRESSURE (in. wg)
FLOW (cfm)
3-15 Ton
C101124
Fig. 23 -- Horizontal Power Exhaust Performance
General fan performance notes:
1. Interpolation is permi ssible. Do not extrapolate.
2. External static pressure is the static pressure difference bet ween the return duct and the supply duct plus t he sta tic
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 the tables above. Sele ction software i s available, t hrough your salesperson,
to help you select the best motor/drive combination for your applic ation.
4. The Fan Performance tables offer motor/drive recommendati ons. In cases when two motor/drive c ombinations would
work, Bryant recom mended 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 t he performance limits of Brya nt motors, see the application data section of this book.
7. The EPACT (Energy Policy Act of 1992) regulates energy requirements for specific type s of indoor fan motors. Motors
regulated by EPACT include any ge neral purpose, T--frame (three--digit, 143 and larger), single--speed, foot mounted,
polyphase, squirrel cage induct ion motors of NEMA (National Electrical Manufac turers Association) design A and B,
manufa ctured 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. T herefore, the indoor fan motors for Bryant 580J04--16 units are exempt from these requirements.
580J
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