Normal start
If the dryer has not been used for more than 3 months, refer to section Initial start-up. In all other cases,
proceed as follows:
1. Cut off the air supply from the compressor towards the dryer by closing the external
inlet valve.
2. Close the air supply towards the PDP sensor (dryers with PDP sensor).
3. Close the external outlet valve (if installed) between the dryer and the dry air consumer.
4. Start the compressor and slowly open the external inlet valve.
5. Switch the dryer on by pushing the Start button (14) on the Purelogic™ controller.
6. Gradually open the air outlet valve.
7. If applicable, close the bypass valves of the dryer.
8. Open the air supply towards the PDP sensor (dryers with PDP sensor).
Close the external inlet valve in case the compressor needs to be restarted. The high
air speed in the start-up phase of the compressor may damage the desiccant.
To prevent this, a sonic nozzle (available as option) can be installed
Sonic nozzles
8092 2617 37 Sonic nozzle for PH 230 HE
8092 2617 45 Sonic nozzle for PH 320 HE
8092 2617 52 Sonic nozzle for PH 390 HE
8092 2617 60 Sonic nozzle for PH 530 HE
8092 2617 78 Sonic nozzle for PH 635 HE
During operation
At regular intervals, check the status of the LED’s on the control panel. Refer to section Problem solving.
If the PDP Warning LED is lit and the application allows only dry air, shut down the application and let the
dryer regenerate first. Check the PDP temperature regularly. If the PDP temperature is too high, let the
dryer regenerate by closing the outlet valve.
The LED’s for PDP warning and PDP alarm are only functional if the dryer is equipped
with a PDP sensor!
Stopping
To stop the dryer, proceed as follows:
1. If installed and if necessary, open the bypass valves of the dryer so that the application will still
receive compressed air.
2. Close the external inlet valve between the compressor and the dryer and the external outlet valve
between the dryer and the dry air consumer.
3. Let the dryer operate for a period without consumption, to depressurize the vessels.
4. Stop the dryer by pushing the Stop button (13) on the Purelogic™ controller.
Instruction book
52 2920 1891 00
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