Parker CDAS HL 050 Series, Инструкции по установке, эксплуатации и обслуживанию

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Medium Flow Compressed Air Dryers - IOMI.
Purge Economy Operation
Compressor On Load
As the compressor is operating, the relay connection is open and the
dryer will be operating normally, drying the compressed air.
Compressor Off Load
When the air compressor reaches its set operating pressure and goes
off load, the relay in the compressor will close.
This completes the circuit, supplying 24VDC to the P/E (Purge Economy) terminal, activating the purge economy mode.
When purge economy is activated:
If the dryer purge economy mode has been set up as mode 1 (see page 40), the dryer continues until the end of the regeneration cycle,
closes the exhaust valve then stops the cycle after repressurisation of the off-line column.
If the dryer purge economy mode has been set up as mode 2 ( default mode ), the dryer immediately closes the exhaust valve to
repressurise the off-line column then stops the cycle.
With the exhaust valve closed, no purge air is consumed, saving energy & money.
The active inlet valve will remain energised (open). The fault relay(s) and spare output(s) will remain energised.
The purge economy icon will be visible on the display.
Once the system pressure drops due to air demand, the compressor re-starts.
The compressor relay contact will open, removing the 24V DC from the Purge Economy terminal.
The normal drying cycle will now be resumed.