Filters; Process And Regeneration Filters; Conveying Air Filter; Draining Plasticizer - NovaTec NovaWheel NWB- DC+ Series User Manual

21.2 Filters

The filters shipped with the dryer are cleanable. The
maintenance interval for the filters depends on the clean-
liness of the surroundings and the dust/fines in plastic
raw materials. A program should be established to ensure
the filters are cleaned.

21.3 Process and Regeneration Filters

TURN THE MAIN DISCONNECT SWITCH OFF.
On All Models:
Turn the yellow knob, lift the filter access cover, remove
the lock nut and pull cartridge filter out from housing.
Replace the filter or clean it with compressed air, reinstall
filter, re-tighten the lock nut, close filter access cover and
turn the yellow knob to the locked position. Turn the
power ON and restart dryer.
Conveying Air
Filter Canister

21.4 Conveying Air Filter

Loosen the clips on the Conveying Air Filter and remove
it from the canister. Clean it with compressed air or re-
place as necessary and re-install.

21.5 Draining Plasticizer

All models have a plasticizer drain on the *back panel.
Every 2 weeks (or more often) a pan should be placed un-
der the drain and the valve should be turned to the open
position to drain any accumulated plasticizer.
Close the valve after draining.
*-300 &-400 plasticizer drain on front.
Process Air Regen Air
Filter Access Filter Access

21.6 Chain and Sprockets

Drive
Motor

21.7 Desiccant Rotor

The state-of-the-art desiccant rotor supplied with NWB-
DC+ series dryers will last very long under ideal condi-
tions. Due to the nature of desiccant and honeycomb
matrix they make very good filters. The life of desiccant
is directly related to the air born contaminates passed
through it. Avoid exposure to acidic gases or unusual
amounts of dust. Although the desiccant rotor is consid-
ered a cleanable/washable media, the preferred method
of cleaning is to blow dust out with low pressure com-
pressed air and to reactivate the rotor at a maximum
temperature of 380°F (190°C) for 15 minutes. Washing
the rotor, although possible, is not recommended as wash
water impurities may contaminate the desiccant. Prop-
er filtration and preventing contact with chemicals will
greatly improve the life of the desiccant. Inspect the face
of the rotor to see that no surface damage has occurred.
The rotor should turn smoothly upon the shaft.
Desiccant Rotor
Drive Motor
21.8 Drive Motor Replacement
Desiccant rotor removal is accomplished as follows:
1. Remove the chain from the drive sprocket.
2. Remove the drive sprocket from the motor shaft.
3. Remove the screws of the motor from the plate.
4. Replace the drive motor.
To re-install drive motor, reverse the above procedure.
25
Chain
Tension
Assembly
Chain and sprockets
Should be lubricated
every 6 months.
Drive Sprocket