Parker CDAS HL 050 - Dryer Start Up and Shut Down Procedures

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Medium Flow Compressed Air Dryers - IOMI.
Display - Start Up
When applying power to the dryer, the controller
display will show the software version number for
10 seconds.
Important Notes:
Start up column
At rst start-up from commissioning, the dryer will automatically start drying on column 1. If the dryer has been operated previously,
the controller will remember its last known position from power o and resume from where it left o in the cycle.
Dewpoint Display
When the dryer is operating, the outlet dewpoint will be shown in real time in the upper left corner of the display.
CDAS HL and OFAS HL -20°C / -40°C PDP dryers are supplied as standard with the Parker Dewpoint Sensor (PDS).
e accuracy range of the PDS is -50°C PDP to 0°C PDP. When the outlet dewpoint is better than -50°C, the display
will only show <-50°C.
For example, if the actual outlet dewpoint is -55°C, the display will show <-50°C.
CDAS HL -70°C PDP variants / OFAS HL -70°C PDP variants / FBP HL all variants are tted with a dewpoint
hygrometer with an accuracy range of -100°C to +20°C.
e dewpoint display on these models will always be in real time.
For example, if the outlet dewpoint is -75°C, the display will show -75°C.
Dryer Start Up & Shut Down Procedures
Dryer Start Up
1. Ensure that the isolation valves on the inlet and the outlet of the dryer are closed.
2. Switch on the dryer electrical supply and verify that the display illuminates.
3. Slowly open the isolation valve on the inlet of the dryer and verify that there are no leaks.
4. Test the condensate drains of the lters by manually opening and closing the oat drain (warning -
pressurised air or condensate will be present) and ensure they are discharging correctly into a suitable
collection vessel.
Important Note: e pressure gauges on the dryer will not indicate pressure until the dryer begins to cycle.
5. Slowly open the outlet isolation valve to allow the system to pressurise. Do not open the valve fully until the down stream system
has reached the correct operating pressure.
e dryer is designed for continuous use and, once running, requires no further operator intervention.
Dryer Shut Down
To shut down and depressurise the dryer:
1. Turn OFF the dryer electrical supply at the isolator.
2. Close the isolation valve on the outlet followed by the isolation valve on the inlet.
3. Slowly open the drain ball valve on the outlet lter to depressurise the dryer.
Important Note: A small amount of air may be trapped between the inlet isolation valve and the dryer inlet. is
can be removed by manually opening and closing the inlet lter oat drain.
6N/m
6N/m