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53RT-PRC010-EN
Figure PD-5 — Supply Fan Performance With VARIABLE FREQUENCY DRIVE or WITHOUT INLET VANES — 40, 50 and 55 Tons
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
(40, 50, 55 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 22000 24000 26000 28000 30000
CFM
STATIC PRESSURE, Inches w.c.
40 HP
7.5 HP
10 HP
15 HP
20 HP
25 HP
30 HP
1200 RPM
600 RPM
700 RPM
800 RPM
900 RPM
1000 RPM
1100 RPM
500 RPM
5 HP
40% wocfm
50%
60%
70%
SQHFC40, C50, C55
Dual 20 X 20 Fans
Entrance Losses
- w ithout Inlet Guide Vanes
- w ithout Evap Coil
- w ithout Filters
- w ithout Return Air Dampers
- w ithout Exhaust
Fan Curve Limits
- Minimum Motor HP = 7.5
- Max imum Motor HP
C40 = 25 HP
C50 & C55 = 30 HP
- Max imum RPM
7.5 - 15 HP = 1141
20 - 30 HP = 1170
- Max imum CFM
C40 = 18,000
C50 = 22,500
C55 = 24,000
- Max imum Static Pressure
Leaving the Unit = 4.0" w .c.
90%
80%