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45RT-PRC010-EN
Note:
1. Important: Maximum static pressure leaving the rooftop is 4.0” H2O positive. The static pressure drops from the supply fan to the space cannot exceed 4.0” H2O.
Performance
Data
(20, 25 Tons)
Figure PD-1— Supply Fan Performance With VARIABLE FREQUENCY DRIVE or WITHOUT INLET VANES — 20 and 25 Tons
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 14000 16000 18000 20000
CFM
STATIC PRESSURE, Inches w.c.
40% wocfm
50%
60%
S_HFC20 & 25 Ton
Dual 15 X 15 Fans
Entrance Losses
- w ithout Inlet Guide Vanes
- w ithout Evap Coil
- w ithout Filters
- w ithout Return Air Dampers
- w ithout Exhaust Fan
Fan Curve Limits
- Minimum Motor HP = 3
- Max imum Motor HP
C20 = 10 HP
C25 = 15 HP
- Maximum RPM
3 HP - 5 HP = 1100
7.5 HP - 15 HP = 1655
- Maximum CFM
C20 = 9,000
C25 = 11,000
- Maximum Static Pressure
Leaving the Unit = 4.0" w .c.
90%
80%
70%
1700 RPM
1600 RPM
1500 RPM
1400 RPM
1300 RPM
1200 RPM
1100 RPM
1000 RPM
900 RPM
800 RPM
700 RPM
600 RPM
500 RPM
15 HP
10 HP
7.5 HP
5 HP
3 HP
20 HP