Airstream Expert Motor Curves Laboratory Conditions

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Airstream Expert Motor CurvesLaboratory
Conditions
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Motor curve recommendations for various fans from
Airstream controller
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Where to set Motor Curves on Airstream TC-5 or
Aerotech 2.4
typ
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How Does the Controller Change Voltage to Control
Variable Speed Fans?

• Theveco (AP, Aerotech, Acme)
• 10 selectable motor curves
• Phason Supra
• 5 selectable motor curves
• Hired Hand
• 3 selectable motor curves
• Varifan
• 8 selectable motor curves
• Valco Ventra and others
• ?

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Ideal Relative Humidity 50-70
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Relative Humidity Fluctuates
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Static Pressure and Airflow Resistance

• Desired static pressure
• 0.05 H2O
• No more than 0.12 H2O

Negative Pressure
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Static Pressure and Variable Speed Fans
Run 1 fan at higher minimum speed vs 2 fans at
lower speed
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10 mph 0.05 20 mph 0.20
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