68
Figure 4-2 (Continued)
40, 50 & 55 Ton Supply Fan Performance without Inlet Guide Vanes
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%
S_HF*40, *50, *55
Dual 20 X 20 Fans
Entrance Losses
- without Inlet Guide Vanes
- without Evap Coil
- without Filters
- without Return Air Dampers
- without Exhaust
Fan Curve Limits
- Minimum Motor HP = 7.5
- Maximum Motor HP
*40, *50 & *55 = 30 HP
- Maximum RPM
7.5 - 15 HP = 1141
20 - 30 HP = 1170
- Maximum CFM
*40 = 18,000
*50 = 22,500
*55 = 24,000
- Maximum Static Pressure
Leaving the Unit = 4.0" w.c.
90%
80%
60, 70 & 75 Ton Supply Fan Performance without Inlet Guide Vanes
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_HF*60, *70, *75
Dual 22 X 22 Fans
Entrance Losses
- without Inlet Guide Vanes
- without Evap Coil
- without Filters
- without Return Air Dampers
- without Exhaust
Fan Curve Limits
- Minimum Motor HP = 10
- Maximum Motor HP = 40
- Maximum RPM = 1130
- Maximum CFM
*60 = 27,000
*70 & *75 = 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% wocfm
10 HP
15 HP
20 HP
25 HP
30 HP
40 HP
50 HP
500 RPM
60%