RT-SVX072A-EN
69
Performance Data
Supply Fan Performance
NNoottee:: Direct Drive plenum fan applications require
minimum external static values ranging from 0.3
to 0.7 in H
2
O.
Figure 39. Supply fan performance with or without variable frequency drive - 20 and 25 tons air-cooled, - forward
curved
1700 RPM
1600 RPM
1500 RPM
90%
1400 RPM
1300 RPM
1200 RPM
1100 RPM
1000 RPM
900 RPM
800 RPM
600 RPM
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
6.5
7.0
7.5
8.0
0 2000 4000 6000 8000 10000 12000
Sta!c Pressure, Inches w.c.
Airflow, CFM
IImmppoorrttaanntt:: Maximum static pressure leaving the
rooftop is 4.0" H
2
O positive. The static
pressure drops from the supply fan to the
space cannot exceed 4.0" H
2
O.
UUnniitt SSttaarrttuupp