NovaTec NovaWheel NWB- DC+ Series, Руководство пользователя

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18.0 DRYING MATERIAL
18.1 Quick Op Screen
NOTE: Assure voltage, connection and phasing are
correct, cooling water is supplied (for drying over 225°F)
and thermocouple is inserted in hopper. Connect material
source to Hopper Receiver. Turn Main Disconnect Switch
to “ON” position.
Process Temperature is factory set at 160°F.
Press temperature button
to change temperature or
to access RESIN MENU and choose one of the
pre-set resins.
Press Green “ON”
switch to start the Process Heater
and Blowers. Note that Process Heater can be turned
OFF or ON using buttons on the Quick Op screen.
NOTE: Do not turn the process heater and blowers
on until the hopper is at least half full.
Press Hopper Receiver icon to access Hopper Loading
screen shown below.
18.2 Hopper Loader Setup
Press each function and enter value on numeric screen.
Press after each entry. Press
on Hopper Loader
screen or on Quick Op screen to access Machine
Mount Receiver screen (below).
NOTE: Values in Hopper and Machine Receiver screens
should be adjusted to optimal values after processing begins.
Blowback must be specified when order placed.
Fill Time - the overall time, in seconds,
that material enters the convey air
stream. It is the time the station T vacuum valve, and if
equipped, the material purge valve, are open, allowing
material flow. This setting is relative to the size of the
receiver and the flow characteristics of the material.
Default time is 10 seconds. Note that on receivers
equipped with a proportioning valve this is the overall
virgin and regrind loading time.
Purge Time – (if equipped) is the time in
seconds that the station T valve remains
open while the material purge valve is closed to material
flow. It allows for the purging of material from the
conveying line after the Load Time has expired. This time
is relative to the distance from the material purge valve
to the receiver and how smoothly the material flows.
Default time is 10 sec.
Dump Time - this is the time that the
material takes to fall from the receiver
into the drying hopper, bin or machine after loading is
completed. This time is determined by how smoothly or
slowly the material flows by gravity from the receiver.
Default is 10 seconds. NOTE: Dump Time should be set
for 10 seconds or more.
Pulses – For receivers equipped with
filter cleaning blowback capability, this
setting defines how many bursts of compressed air are
released into the receiver during the dump cycle, to clean
the filter. Requires password level 3 to make changes.
Regrind Pct (Regrind Percent) – defines
what proportion of vacuum time will
dedicated to loading regrind into the hopper. This value
is a percentage of the FILL time. For example, if the FILL
time was 10 seconds and the Regrind Percent was 40%,
then the proportioning valve will dedicate 4 seconds to
filling regrind material. The proportioning valve will then
allow virgin material to be loaded for the remaining 6
seconds.
Regrind Layer - works in conjunction with
the Regrind Percent. It tells the propor-
tioning valve how many times to switch between loading
regrind material and virgin material within a single fill
cycle. A layer consists of both a regrind material part and
a virgin material part. CAUTION: The calculated load
time per layer should be 2 seconds or greater to move
material consistently. Proportioning repeatability im-
proves as each layer’s load time increases.