OMEGA AIR A-DRY Series, Инструкция по установке и эксплуатации

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14.5.1 Underdiemnsioned adsorption dryer
If the dryer is underdiemnsioned and the volumetric flow through the dryer is much higher
than the dryer rating the ammount of molecular sieve for adsorption and the quantitiy of the
air that passes through the molecular sieve during regeneration will be too small.
Consequently the pressure dew-point could continue to rise towards the point where
molecular sieve is saturated and the inlet and outlet dew-point are equal.
See chapter Technical data for more dimensioning information and correction factors.
14.5.2 Liquid water in the towers
If there is no cyclone separetar upstrem from the dryer or there is a malfunction of drain on
prefilter liquid water could start to gather in the towers. DRY has a bed of water resistant
silica gel for protection in such cases but if the ammount of liquid water is too great and it
passes this bed the molecular sieve will be destroyed and it will not adsorb the water vapor
anymore. The result is a higher pressure dew-point.
Replace the adsorbent and service and/or improve pre-filtration.
For more information on proper air preparation see the chapter Installation Layout .
14.5.3 Oil in the towers
If the compressor produces too much oil in the outlet air and this air reaches the adsorption
dryer it will destroy the molecular sieve and pressure dew-point will get higher. In this case
however the protective bed of water-resistant silica gel will get destroyed also and the
pressure dew-point will rise faster.
Check-up procedure:
1. Check pre-filter and after-filter for signs of oil and/or other contamination!
2. Change the filter catridges if needed!
3. If there is oil on the after-filter, change the adsorbent on both towers!
4. Service and/or improve pre-filtration!
5. Service the compressor!
Compressed air at the dryer inlet should be free of solid particles, oil particles and liquid
water. For more information on proper air preparation see the chapter
Installation Layout !