EKOM AD2250, User Manual

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PRODUCT DESCRIPTION
NP_AD500-2250-1_01_2020 -12- 01/2020
8.2. AD500-2250 S
“S” versions represent the standard dryer version without pressure dew point sensor and purge
control. The control unit in
the “S” dryer versions performs the following tasks:

evaluation of the control signal from the compressor;

chamber switching - controlling the inlet and regeneration solenoid valves;

counting RUN hours when the dryer is active;

counting STANDBY hours;

monitoring service intervals and indicating upcoming service;

counting the cycles of solenoid valves (note: the Inlet_A inlet valve is monitored);

displaying information according to the user interface specifications (see Chapter 20).
8.3. AD500-2250 C
“C” dryer versions are equipped with a pressure dew point sensor and support purge control. The
control unit in
the “C” dryer versions performs the following functions above and beyond the “S”
versions:

monitoring and evaluation of pressure dew point (PDP) values;

indication of a high dew point level;

purge control - pause chamber regeneration
(“ECONOMY” mode);

counting ECONOMY mode hours.
8.4. Operating modes
“RUN” mode
The dryer is in “RUN” mode when the control signal from the compressor is active. The cooling fans
are running and the valves cyclically switch the chambers based on the diagram specified below. T
represents the chamber switching period, while dT is the phase of pressure equalisation in the
chambers before switching.