Sharp OVER THE RANGE MICROWAVE OVEN/HOOD SYSTEM Installation Instructions Manual page 7

C. Vertical Ventilation System
The unit is shipped assembled for recirculating.
Step 1 and 2.
A-1 Ventilation motor.
See Figure 8
Step 3.
Turn the blower unit so that the fun blade openings are facing
upward.
See Figure 14
Step 4.
Place the blower unit into the opening.
Secure the Case Blow Fan Top, the blower motor and cover to
the microwave oven with the screw(1, 2 and 3) from step 1 and
2. See Figure 15.
Carefully match the exhaust opening location of the microwave
and attach the damper to blower motor cover by sliding it into
the guides at the blower motor cover. See Figure 16, 17.
Be sure that the damper hinge is on the front and the
damper swings free into the wall outlet.
Figure 16
7
After Turning
Figure 14
Figure 15
Figure 17
Fan Blade Openings
Facing Up
Back of Oven