Unit Start Up
106 RT-SVX36K-EN
Fan Performance Tables
Figure 60. Supply fan performance with or without variable frequency drive - 20 and 25 ton air-cooled, 24 and 29 ton
evaporative condensing - 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
Stac Pressure, Inches w.c.
Airflow, CFM
S_HL*20 & 25, 24 & 29 Ton
Dual 15 X 15 FC Fans
Entrance Losses
- without Evap Coil
- without Filters
- without Return Air Dampers
- without Exhaust Fan
Fan Curve Limits
- Minimum Motor HP = 3
- Maximum Motor HP = 20
- Maximum Fan RPM = 1750
- Maximum CFM
20/24 = 9,000
25/29 = 11,000
- Maximum Static Pressure
Leaving the Unit = 4.0" w.c.
Figure 61. Supply fan performance with variable frequency drive - 20 and 25 ton air-cooled, 24 and 29 ton evaporative
condensing - direct drive plenum, 80% width
2400 RPM
2300 RPM
2200 RPM
2100 RPM
2000 RPM
1900 RPM
1800 RPM
1700 RPM
1600 RPM
1500 RPM
1400 RPM
1300 RPM
1200 RPM
1100 RPM
1000 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 1000 2000 3000 4000 5000 6000 7000 8000 9000 10000 11000 12000
Stac Pressure, Inches w.c.
Airflow, CFM
S_HL*20 & 25, 24 & 29
Single 22.25” 80% Width DDP Fan
Entrance Losses
- without Evap Coil
- without Filters
- without Return Air Dampers
- without Exhaust Fan
Fan Curve Limits
- Minimum Motor HP = 3
- Maximum Motor HP = 20
- Maximum Fan RPM = 2400
- Maximum CFM:
20/24 = 9,000
25/29 = 11,000
Maximum Static Pressure
Leaving the unit = 4.0” w.c.