After a preset period (or when triggered by the PDP sensor) the function of the towers is
reversed. The fully regenerated tower will now dry the air, while the desiccant in the other tower
will be regenerated.
By default, the regeneration timer will restart from the beginning of the cycle in case of a power
failure during operation or in case the dryer was switched off.
The working sequence of the controller is as follows:
Status Left tower Right tower V1 V2 V3 V4
0 Stopped Stopped 0 0 0 0
1 Adsorbing Adsorbing 0 0 0 0
2 Shifting Adsorbing 1 0 0 0
3 Depressurizing Adsorbing 1 0 1 0
4 Regenerating Adsorbing 1 0 1 1
5 Equalizing Adsorbing 1 0 0 0
6 Freeze (compressor
synchronization)
Adsorbing 1 0 0 0
7 Standby Adsorbing 1 0 0 0
8 Adsorbing Adsorbing 0 0 0 0
9 Adsorbing Shifting 0 1 0 0
10 Adsorbing Depressurizing 0 1 1 0
11 Adsorbing Regenerating 0 1 1 1
12 Adsorbing Equalizing 0 1 0 0
13 Adsorbing Freeze (compressor
synchronization)
0 1 0 0
14 Adsorbing Standby 0 1 0 0
When the ON/OFF push-button is pressed during operation, the controller jumps automatically to
status 5 or 12 (equalization phase). After that, the Stop status (0) will be reached. The following
start command will restart the sequence from the state 2 or 9. The same happens when the
power is switched off.
On dryers with a Purelogic
TM
controller, the functionPDP Extended Cycle can be activated. See
section Modifying Settings. When this function is activated, the regeneration air flow stops when
the PDP is reached.
Instruction book
14 2920 7111 23
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