Sterlco SDAP 90-225 CFM Series Drying and Conveying Systems - Manual (Page 27)

SDAP Series PD 2 to PD 4 Drying and Conveying Systems Page 27
3-14 Checking for Proper Blower Rotation
Three-Phase Models
The blower rotates properly when air flows from the delivery outlet and a vacuum is felt on the
blower inlet.
Caution!
In three-phase models, incorrect phasing of power leads
can cause backward rotation of blower motors
and CONTAMINATION OF THE DESICCANT!
Always check blower rotation before putting material in the drying hopper!
If the three-phase blower rotates improperly, reverse any two wires at the fused disconnect
outside the dryer or at the disconnect/terminal in the control enclosure. This assures that the
blower rotates in the proper direction.