AAON CN-140 - Manual (Page 27)

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2. Determine the direction of rotation
Right, R, is clockwise when facing the
discharge side of the fan and Left, L, is
counterclockwise when facing the discharge
side of the fan.
3. Determine the bushing mount location
The bushing mount is the center section of
the hub through which the fan is mounted to
the shaft, and typically contains either
setscrews or a center-tapered hole where the
bushing inserts.
Location A is with the bushing mount on air
inlet side of the fan.
Location B is with the bushing mount on air
discharge side of the fan.
Figure 10 - Bushing Mount Location
4. Determine the pin location groove
Disassemble fan on a flat surface and note in
which groove the pin is located.
Figure 11 - RET with Pin in Groove 4
5. Determine whether the pin is in the HUB
or RET
Figure 12 - Fan HUB and RET Castings
A B
Bushing
Mount
Bushing Bushing
1 2 3 4