EN
Installation and operating manual
DRYPOINT
®
AC 410 – 495 | DRYPOINT
®
AC 410 – 495 MS
17
2.3.2.3. Pressure build-up
At the end of the regeneration process, the 2/2-way solenoid valve (5) at the regeneration gas outlet is closed.
The pressure in the regenerating adsorber is built up through the bypass line in the upper piping.
Until the switch-over is started, the regenerated adsorber remains at operating pressure in stand-by mode.
2.3.2.4. Switching over of plant
Depending on the operating mode selected at the text display of the electronic control unit, the switch-over is time-
controlled or load-controlled (see “2.3.3. Control and display elements”).
2.3.2.5. Intermittent operation
If the compressor is operated in discontinuous (intermittent) mode, the plant control can be linked to the
compressor control. This ensures that the plant regeneration is not interrupted.
After completion of the pressure build-up and no compressed air is consumed, the plant remains in stand-by mode.
To couple the plant control to the compressor control, connect the floating NO contact of the compressor to the
clamping strips X12 (digital input) of the control PCB. The contact must be closed when the compressor is not
running.
Stand-by state is indicated on the standard control unit by an LED. In the version with dew point control, it is
indicated in plain text.
This operating mode is only available, if the plant is installed directly downstream of the compressor, and there is a
storage tank downstream of the plant that is large enough to allow for the completion of the regeneration process in
the adsorption dryer without a need to start the compressor.
2.3.3. Control and display elements
2.3.4. Display (standard version)
After successful start-up, the current operating state of the plant is indicated by LEDs on the display.
The plant is controlled automatically and no further operator intervention is required.
1
2
3
4
5
6
1
Adsorber LEDs left
2
Adsorber LEDs right
3
Power LED
(flashing during intermittent operation)
4
Service LED
5
Alarm LED
6
Acknowledge button behind foil
(for service mode)
2.3.4.1. Service messages (standard version)
There are two sets of service indicators: the service LED in running mode and the adsorber LEDs.
The various signals are indicated by 3 different symbols:
Indication by service LED in
running mode
(flashing):
Service A = short-long / service B = short-long-long-long.
Indication by service LED in
service mode
:
3 seconds on, or 3x flashing briefly
Indication by adsorber LED in
service mode
(flashing):
The service message is active, i.e. the time for a service
has been reached.
Indication by adsorber LED in
service mode
(continuously lit):
