3-8
3 Installation
3
Note! The curvature of the scroll should correspond to the curvature of the rotor
blades.
The curvature of the rotor blade from inside to outside shows the forward direction
of rotation. Below shows direction of motors looking from the top of the tunnel.
3.2-2 Direction of motor
Definition of Abbreviations:
CW - Clockwise CCW - Counter Clockwise
Check rotation of the Main fans upon testing of electrical supply. If all fans rotate in
opposite direction, reverse 2 wires in the supply.
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