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Figure 49. Supply fan performance with variable frequency drive - 40 ton cooling only, 30 ton gas heat - direct drive
plenum, 80% width
8.0
7.5
1800 RPM
7.0
6.5
1700 RPM
6.0
1600 RPM
5.5
1500 RPM
5.0
4.5
1400 RPM
4.0
1300 RPM
3.5
1200 RPM
3.0
1100 RPM
2.5
1000 RPM
2.0
1.5
1.0
0.5
0.0
0
2000
4000
Important: Maximum static pressure leaving the rooftop is
4.0" H
O positive. The static pressure drops
2
from the supply fan to the space cannot
exceed 4.0" H
RT-SVX072D-EN
2000 RPM
1900 RPM
6000
8000
10000
Airflow, CFM
O.
2
12000
14000
16000
Notes:
•
Shaded areas represent selectable area.
Contact your local Trane® representative for
more information.
•
Supply fan performance curve includes internal
resistance of rooftop. For total static pressure
determination, system external static must be
added to appropriate component static
pressure drops (evaporator coil, filters, optional
economizer, optional relief fan, optional heating
system, optional cooling only extended casing,
optional roof curb).
•
Maximum Cfm (for cULus approval) as follows:
40 ton - 18,000 Cfm.
•
Minimum motor horsepower is 3 hp. Maximum
motor horsepower is 25 hp. Maximum fan RPM
is 2,000.
Unit Start-up
18000
20000
75
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