20
cycling refrigerated air dryer
R
1
Changing condensate drains parameters
General
•
The condensate drain energizes automatically opens every one minutes (parameter p2) for a duration of
two seconds (parameter p1). The factory setting matches the standard operating conditions of the dryer.
However , you may have to:
•
increase the duration and possibly the frequency of purging if the temperature of the air to be treated is
higher than the rated value and if there is water in liquid condensate downstream of the dryer.
•
decrease the duration and possibly the frequency of the condensate drain if the temperature of the air to
be treated is lesser than the rated value (in the case of a water after cooler after the air compressor) or if
the compressed air to be treated is not saturated with humidity (pre-drying or partial expansion).
•
The objective of properly adjusting the purge duration is simply to limit the loss compressed air to the
absolute minimum required for this operation. A properly adjusted purging operation is characterized by:
the expulsion of condensates (water/oil emulsion) for the majority of the purge time.
a short jet of dry compressed air without condensates at the end of the purge.
Functioning of manual purge
Short cycle:
•
Press the purge icon and hold for 1 second.
•
The screen displays “Sho” for the first three seconds.
•
Release the button to start the short purge cycle (refer to P3 parameter).
Long cycle:
•
Press the purge icon and hold for several seconds.
•
The screen displays “Sho” for the first three seconds and then displays “Lon”.
•
When the screen displays “Lon”, release the button to start the long purge cycle (refer to P4 parameter).
Purge Test
General
The purge needs to be tested during:
•
the first commissioning,
•
routine inspections,
•
the depressurization of the dryer for maintenance operations.
Summary of Contents for NXC 0020
Page 1: ...NXC series cycling refrigerated air dryer user guide...
Page 61: ...notes...
Page 62: ...notes...
