Motor Rotation Signal; Rotor Replacement; Seal Replacement - NovaTec NovaWheel NWB- DC+ Series User Manual

21.9 Motor Rotation Signal

Check that the wheel rotor is rotating properly and each
time a signal goes to the controller, ensure that rotor
complete its cycle and the limit switch hump has reset
the limit switch provided near the rotor. If the hump
is not resetting the limit switch, reset the limit switch
toward the rotor.
21.10 Desiccant Rotor Replacement
Desiccant rotor removal is accomplished as follows:
1. Remove the hex nuts on the Top Plate Assembly.
2. Remove the washers & spring from the Tie Rod.
3. Slide the Top Plate Assembly straight & upward
gently.
4. Loosen the Supporting Tie Rod from where rotor is
to be moved.
5. Remove the driven sprocket.
6. Slide the Rotor straight & upward, make sure that
rotor does not get damaged.
7. Replace the desiccant rotor.
To re-install rotor, reverse the above procedure.
Removing top plate assembly

21.11 Seal Replacement

The top and bottom silicon PTFE coated fabric flat
seals which separates the process from the reactivation
purge compartments. Normally they do not require ser-
vice or replacement. However, should damage occur, or
if air leakage is suspected of causing poor performance,
the seal should be replaced using the following proce-
dure.
1. Remove rotor from the cassette as explained in 20.10.
2. Remove the old seal using knife. Also remove silicon
sealant.
3. Clean the plate surface.
4. Apply fresh silicon sealant.
5. Gently press the seal towards the plate, make sure
the seal's section does not get offset
6. After joining the seal to the plate, let it dry for 24 hrs.
Removing desiccant rotor
NOTE: The smooth Teflon coated side of the seal is al-
ways on the top side of the seal and there should not be
any silicon sealant remaining on that side.
Center
Bushing
Plate
Removed
Center
Bushing
Newly
Replaced
Seal
Follow same procedure for upper and lower seals.
26
Seal
To Be
Replaced
Allen
Bolt