Operating instructions

4.1. Control system
The control system is switched on at the main switch. The control system is
operated via a ”selection window” and the keyboard of the operator panel.
The facility’s control system is factory-programmed. Nevertheless, you have to
set specific values (basic parameters) which are dependent on the processed
material, for instance.
The values entered are stored in the control system and remain so, even after the
unit is switched off or in the event of a power cut. All messages are displayed in
plain text.
In describing this start-up, we have assumed that the various sub-menus are
selected from the ”table of contents”.
This structure of the description has been selected since, in most cases, you will
only work on one item in the ”submenu”.
If you want to work on several ”submenu” items in succession, you can select the
individual items directly by means of the arrow keys.
The control system is designed for connection of one dryer, a maximum of 10
hopper heaters (optional), 10 motor flaps (optional), and one bypass flap
(optional).
Dew point is monitored continuously; dew point temperature is displayed.
Supplementary heating systems are operated directly via the dryer control
system.
All heating systems are equipped with temperature limiters which reliably prevent
overheating.
The control system is communication-capable (optional); a printer can also be
connected (optional).
The individual states of operation are indicated by means of a flow chart with
symbols and LED’s.
Dehumidified air dryer
Start-up 4-2