Product Manual

If the microcontroller registers a malfunction, the automatic drain valve will automatically change
to alarm mode. This alarm signal can be relayed via a potential-free contact.
The electronic drain is available for 3 operating voltages: 220 V, 115 V and 24 V (50/60 Hz). An
extra electric wiring can be foreseen to connect the potential free contacts and an external test
button.
Always remove the manual drain or the automatic drain of the filter before installing the
electronic drain.
Activated Carbon Tower QDT
QDT filters are designed for the removal of oil vapours and odours from compressed air.
The air flows through the activated carbon which is contained in the QDT filter element and which
adsorbs oil vapours and odours. The QDT has to be preceded by a DD+ and PD+ filter or an UD
+ filter. A DDp+ or a DDp+-PDp+ filter can be installed downstream a QDT to improve air purity.
QDT filters adsorb all oil and most of the organic volatile compounds in the air.
Some volatile organic substances are more difficult to remove. As an example, this filter does not
remove methane, carbon monoxide, carbon dioxide and some other toxic gases and fumes.
Therefore air from the QDT can not always directly be used for breathing purposes.
For more information on QDT 20-310, refer to Instruction book 29xx 7090 72.
Instruction book
2920 7199 41 15