belfab NBM-OP Manuel D'instruction Et De Maintenance page 10

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7
INITIAL START-UP
With the ducting installed and connected, an amperage reading should
immediately be taken upon start up to insure that the motor is not being
overloaded. Make sure forty-five (45) gal. drums are sealed.
On initial start up with clean filters and a minimum of ducting on fan inlet,
motor overload may trip. Should this occur, you must restrict the air flow on
the air inlet opening by installing a blast gate complete with locking device.
This is usually a temporary measure until filters build up a dust cake and
create the required resistance.
WARNING
Fan wheel is designed for light material loading (sanding dust, sawdust, etc.).
Severe damage may be caused to the fan by allowing blocks of wood or other
foreign objects to enter the fan.