Installation, Operation and Maintenance Manual
15
4. PRE‐START‐UPCHECKLIST
Make sure all connections to both air and electrical supplies are in the correct position
(when not pre-mounted).
Recheck all the electrical and air connections for tightness.
Verify that all electrical systems have been properly grounded.
Verify if the motor protection switch setting matches the motor full load current.
Check the star/delta change over delay setting. Factory default is at 5 seconds, but it can
be adjusted in the setting mode (see chapter 7.7).
For a multi-module system ensure all interconnecting cables are in place and mode and
address switches are set correctly.
After the electrical connections are in place ensure that the door is correctly closed and
secured. The enclosure is designed so the main switch needs to be turned off before the front
panel can be opened.
5. OPERATION
5.1. Single Fan Afterfilter Systems
The TCB control board provides the output signals to the diaphragm valves mounted on the Afterfilter
and also controls the fan motor start-up procedure (and can controls other auxiliary equipment if fitted –
e.g. rotary valve, screw conveyor etc). The differential pressure measured gives a clear indication of the
pressure loss over the filter elements.
By default the unit will start pulsing when the threshold value of 80 daPa is exceeded. A cleaning cycle
normally pulses all valves of the unit in sequence with an interval of 10 seconds between every pulse.
As soon as the differential pressure drops below 40 daPa, the controller will stop the cleaning when a
full cycle is completed; this is called ‘Stop & End’ cleaning.
The LCD display will indicate the status of the unit during operation e.g. SYSTEM ON, CLEANING ON
etc. as well as indicating the current filter differential pressure.
When the differential pressure rises above 150 daPa, an alarm message will be displayed and the
alarm LED will illuminate.
The off-line clean function allows the cleaning cycle to continue for a number of cycles after the fan has
been switched off. This function is switched off by default but can be initiated by altering parameter
P06.
These factory default values can be altered when needed using the guidelines detailed in the following
chapters.
5.2. Multiple Fan Units e.g. ECB Units
The TCB control board provides the output signals to the diaphragm valves mounted inside the
Afterfilter and also controls the fan motor start-up sequence. The differential pressure measured gives a
clear indication of the pressure loss over the filter elements.
For standard units handling non-explosive powders the cleaning will, by default, start pulsing when the
threshold value of 80 daPa is exceeded. A cleaning cycle normally pulses all valves of the unit in
sequence with an interval of 10 seconds between every pulse. As soon as the differential pressure
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