DHL Regenerative Dryer w/SHDC-2300 touch screen controller User Manual US-EN
Subject to EAR. ECCN EAR99 and related export control restrictions.
8. Maintenance:
The DHL series of adsorption dryers requires very little maintenance. However, periodically the
Filter Elements and the Desiccant material have to be changed to ensure that the dryer provides
you with reliable and uninterrupted service.
MAINTENANCE, TROUBLESHOOTING, SPARES AND DISMANTLING
8.1 CONTROLS AND MAINTENANCE
The maintenance operations must be worked out by qualified personnel.
Before any intervention, verify that:
● No part of the machine is powered and that it cannot be connected to the main power
supply.
● No part of the machine is under pressure and that it cannot be connected to the
compressed air system.
The user that works with the machine must wear hearing protection before operating the dryer.
Each employee must select proper PPD (Personal Protection Device) hearing protector
(earmuffs, ear canal caps, and earplugs) in order to prevent any uneasiness that could cause a
dangerous situation.
● Check if the inlet filter condensate drain works regularly.
● Check the clogging state of the filters by reading the installed differential pressure
gauge.
● Check that the tower switching operation takes place correctly and in the set cycle
times.
● Check that the regenerating tower differential pressure gauge indicates 0 bar.
● Replace the inlet and outlet filter cartridge.
● Clean the silencers or if necessary replace them.
● Check if the regeneration drain solenoid valves (PVA and PVB) work regularly.
● Check if all screws of the electrical wiring are correctly tightened.
● Check and control the operation of the dryer.
Every 2 Years /
6000 Hours
In addition to the programmed maintenance, every year:
● Replace the membrane of the regeneration drain solenoid valves (PVA and PVB).
● Replace the purge exhaust valves if required.
● Check the operation of the dryer after any replacements.
Every 3 Years /
9000 Hours
● Replace the adsorption material. The estimated average life of the adsorption material is
3-5 years, with 10 minute cycle times and 3000 hours / year in any case it depends on
the quality and temperature of the inlet air and on the correct programmed maintenance.
8.2 DISMANTLING OF THE DRYER
● If the dryer is to be dismantled, it has to be split into homogenous groups of materials.
PART AND MATERIALS TABLE
Activated alumina or molecular sieve optional
Carbon steel, stainless steel
Stainless steel / carbon steel
Filtering material, PVC, oil
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