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2000 Fire Door-Fan Manual updated 2002-05-28 Page 22 of 58
Flow Range Diagram
Always start in the Flow Away position.
Adjust speed till room pressure is reached. Fan must be running at least at half speed and flow pressure must be
greater than room pressure. If not, insert the Range A plate and keep changing to lower ranges till motor is at
least half speed and flow pressure must be greater than room pressure.
Range 22 - Flow Away Range A - Flow Away
Range B - Flow Away Range C8 - Flow Away
Range C4 - Flow Away Range C2 - Flow Away