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57RT-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.
Figure PD-7 — Supply Fan Performance With VARIABLE FREQUENCY DRIVE or WITHOUT INLET VANES — 60, 70 and 75 Tons
(60, 70, 75 Tons)Performance
Data
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 3000 6000 9000 12000 15000 18000 21000 24000 27000 30000 33000 36000
CFM
STATIC PRESSURE, Inches w.c
.
S_HFC60, C70, C75
Dual 22 X 22 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 = 10
- Maximum Motor HP = 40
- Max imum RPM = 1130
- Maximum CFM
C60 = 27,000
C70 & C75 = 30,000
- Maximum Static Pressure
Leaving the Unit = 4.0" w .c.
600 RPM
40% wocfm
7.5 HP
700 RPM
800 RPM
900 RPM
1000 RPM
1100 RPM
1200 RPM
50%
70%
80%
90% w ocfm
10 HP
15 HP
20 HP
25 HP
30 HP
40 HP
50 HP
500 RPM
60%