Maguire Products VBD-1000, Installation Operation & Maintenance

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Maguire Products, Inc.
Rev. March 5, 2018 – VBD-1000 Touchscreen
45
VBD
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- Vacuum Dryer
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LTC Loader Throughput Cutoff – weight/minute – 00005
When loader 2 (downstream loader) mode is set to “THRUPUT”, and the amount of
material in the Retention Hopper is at or below the LTP parameter, and the
throughput is below this parameter (LTC), turn the loader 2 output off.
HHV Heating Hopper Volume – 10ths of cubic feet or 10ths of liter.
The amount of material that the heating hopper can hold taking into account dead
space at the top and how far the loader hangs into the heating hopper. This
parameter is used to calculate the beginning of an auto shutdown when loader #1 is
set to auto. Installation of an optional heating hopper extension would necessitate
changing this parameter.
HHU Heating Hopper High Level (%) – 00095
The level, expressed as a percentage, that the heating hopper will be filled to when
Loader #1 is set to AUTO (and the heating hopper loader signal cable is wired in
series to the Loader #1 control relay). Note that the deadband is is 5%.
HLA Heating Hopper Level Alarm (%) – 00050
The level, expressed as a percentage, that the Heating Hopper Level Alarm will
trigger if enabled in the Alarm Setup menu. Any heating hopper level at or below
this level will trigger the alarm.
Heater Parameters
PTS Heat1 Temperature Set-Point (Temperature) – 00150
Heating hopper air inlet temperature setting in F° or C°
PHT
Preheat Time – Time in Minutes – 00030
Time in Minutes that the material in the heating hopper is heated following a cold
start before normal Run Dryer sequence starts.
PTD
Preheat Target Delta – Degrees – 00030
When preheat mode is set to AUTO (not time), the preheat cycle will end when the
temperature of the air exiting the heating hopper (T2) is within PTD degrees of the
air entering the heating hopper (T1).
RTS Run Temperature Setting – Degrees – 00150
The heating hopper air inlet temperature setting in °F or °C. This is the
temperature that the resin is heated to before the vacuum cycle, and is shown as
“T1a” on the status screen.
PT1
Heat1 Proportional – Term – 00040
This parameter is used to make adjustments to the heating hopper heat output.
Changes to this parameter should not be made unless directed by a Maguire
Technician. The proportional term (or “gain”) makes a change to the heating
hopper heater output that is proportional to the current error value difference
between set-point and actual temperature.