Function Controls; Process Temperature Control; Process Temperature Control (Drying Temperature); Regeneration Temperature Control - NovaTec NovaWheel NWB- DC+ Series User Manual

13.0 FUNCTION CONTROLS

The NWB-DC+ Series dryers come complete with the
following controls:
13.1 Process Temperature Control (Drying Temperature
The Temperature Control is a part of the NovaWheel
NovaTouch PLC controller and controls the process outlet
temperature as per the set value. In addition, there is a
process high temperature limit thermostat that is provid-
ed for extra safety. (Refer to the controller section).

13.2 Regeneration Temperature Control

The regeneration temperature is controlled by the Nova-
Touch PLC controller. In addition, there is a regeneration
high temperature limit thermostat, which provides extra
safety. The regeneration temperature is set at about
380°F. (190°C) and should not be changed.
13.3 Process & Regeneration Air Filter Pressure
Switches (PS)
The air pressure differential across the process filter and
the regeneration filter is monitored and the NovaTouch
display will alarm and show when a filter needs to be
cleaned or replaced. These are factory set but often need
to be adjusted in the field once the customer loads resin
in the hopper.
Access pressure switches after opening the side panel of
the dryer. Remove Phillips screw that holds clear cover in
place (Fig. 1). Turn knob clockwise or counter-clockwise
to either increase or decrease.

13.4 Process Air Dew Point Monitor

It measures the process air dew point from the dryer.

13.5 Intelligent Regeneration

Intelligent Regen constantly monitors the regeneration
inlet and outlet temperatures and controls them to opti-
mize the energy and dew point performance of the dryer.

13.6 Conveying Control

Provides entry of load/dump times and number of
attempted loads before No-Load Alarm is activated plus
Blow Back control, if specified.
Process Filter Pressure Switch
Regen Filter Pressure Switch

14.0 PRE-OPERATING SYSTEM CHECK

Once material, vacuum hose, water and electrical con-
nections are made, the NWB-DC+ Series dryer should be
given a final checkout.

14.1 Starting The Dryer

Turn the main disconnect switch to "ON"
position to power the dryer.
Depress the GREEN START switch on the
front panel to start the dryer.
The blowers and heaters are now energized and the des-
iccant wheel will begin turning and start to dry the return
air. It will take several minutes and a couple revolutions
of the wheel, for the dew point to get down to the -40°
dew point.
WARNING: Always use the Green/Red switch to START
or STOP the dryer. The Power Disconnect switch should
only be used in True Emergency conditions. Repeated
use of Power Disconnect can cause dryer component
failure.

14.2 Checking Electrical Phase

Your NOVATEC NWB-DC+ Dryer includes Phase De-
tection. This is particularly important for dryers that may
be moved around the plant. When you turn the MAIN
Disconnect switch to the ON position, a Pop-Up Alarm
will appear on the screen if the connection is not correct.
You should immediately correct this condition.
WARNING: Any wiring procedure should only be done by
a qualified electrician familiar with three phase electrical
wiring.
14.3 Changing From F° to C°
The factory setting if F but degrees can be set to C or F
on the opening WELCOME screen. (See page 21)
NOTE: All dryers are set to display temperatures in de-
grees F when shipped.
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