"Larry W" wrote in message
...
In article ,
Leon wrote:

If it sucks it is wired correctly, if it blows it is not wired correctly.
Typically it is correctly wired if it sucks into the center and blows from
the perimeter.



The centrifugal blowers used on dust collectors will not "blow" from
the inlet (center of the fan enclosure) no matter which way the motor
is turning. The low pressure area will always be created at the center
of the impeller and high pressure at the circumference. If the impeller is
directional, incorrect rotation will cause a decrease in efficiency, but
it will never reverse direction of flow.


OH!