AAON RN Series Installation Operation & Maintenance page 86

Frame
A
Wheel
Bearing
beams
(2)
Flat surf ace
B
Avoid Racking of Cassette Frame
To verify, make certain that the distance
between wheel rim and bearing beam is the
same at each end of the bearing beam, to
within 1/4 of an inch (dimension A & B).
This amount of racking can be compensated
for by adjusting the diameter seals.
If greater than 1/4 inch (dimension C),
racking must be corrected to ensure that drive
belt will not disengage from wheel.
Polymer Wheel Startup Procedure
CAUTION
Keep hands away from rotating wheel!
Contact with rotating wheel can cause
physical injury.
1. By hand, turn wheel clockwise (as
viewed from the pulley side), to verify
wheel turns freely through 360º rotation.
2. Before applying power to drive motor,
confirm wheel segments are fully
engaged in wheel frame and segment
retainers are completely fastened. (See
Segment Installation Diagram).
3. With hands and objects away from
moving parts, activate unit and confirm
86
Bearing beams shown
racked
C
wheel rotation. Wheel rotates clockwise
(as viewed from the pulley side).
4. If wheel has difficulty starting, turn
power off and inspect for excessive
interference between the wheel surface
and each of the four (4) diameter seals.
To correct, loosen
adjusting screws and back adjustable
diameter seals away from surface of
wheel, apply power to confirm wheel is
free to rotate, then re-adjust and tighten
hub and diameter seals, as shown in hub
seal adjustment diagram.
5. Start and stop wheel several times to
confirm seal adjustment and to confirm
belt is tracking properly on wheel rim
(approximately 1/4" from outer edge of
rim).
Diameter Seal Adjustment
Hub Seal Adjustment
diameter seal