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Unit Start Up

108 RT-SVX36K-EN

Figure 64. Supply fan performance with variable frequency drive — 30 ton air-cooled, 36 ton evaporative condensing -

direct drive plenum, 80% width

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 13000 14000 15000

Stac Pressure, Inches w.c.

Airﬂow, CFM

S_HL*30/36 Ton

Single 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 = 2200

- Maximum CFM = 13,500

- Maximum Static Pressure

Leaving the unit = 4.0” w.c.

Figure 65. Supply fan performance with variable frequency drive — 30 ton air-cooled, 36 ton evaporative condensing -

direct drive plenum, 120% width

2100 RPM