Olivetti d-Copia 3002MF plus Service Manual page 453

(2) Direction of installing the principal fan motors
When detaching or reattaching the fan motor, take careful of the installing direction (intake or exhaust).
Eject fan motor
(Rating label: outside)
LSU fan motor
(Rating label: inside)
Exhaust
Intake
Power sorce fan motor
(Rating label: inside)
Intake
Figure 1-5-135
Y118240-1
1-5-79 Service Manual