Section 8
Maintenance
Warning: Only experienced and licensed electricians who are trained to handle compressed air systems should service
or repair Trident products.
Adsorption dryers are robust, reliable machines. To ensure uninterrupted, problem-free operation, perform the inspections
described in the following sections at the specified intervals.
In this section, the item codes of the various parts of the dryer are marked on the respective illustrations. Refer to the
list of spares (Section 11. Recommended parts and consumables) in this manual for details. Cite the item codes when
obtaining spares.
Before starting up or performing any maintenance on any Trident air dryer, filter, drain system or other equipment, you must
first turn off and disconnect the electrical power supply to the equipment at the main switch. Also, be sure to bypass and
depressurise the dryer to 0 psi g.
8.1 Monthly inspections
l Verify that the drying-and-regeneration cycle is normal (as described in the section 'Running' in the chapter 'Operation'.
If it is found that the operating cycle is not normal, use the troubleshooting section of this manual (Section 10.
Troubleshooting) to address the problem
l Verify that the silencers are not clogged. There will be no air flow through a silencer that is clogged. A clogged silencer
must be replaced with a new silencer. The silencer may be removed by unscrewing it. Fit the new silencer on the exhaust
valve and tighten it
8.2 Semi-annual inspections
l Verify that the dryer is cycling normally
l Verify that the silencers are not clogged.
l Replace clogged silencers with new silencers as described under 'Monthly inspections'Replace the filter elements of
the filters
8.3 Annual inspections
l Verify that the dryer is cycling normally as described in this manual.
l Verify that the silencers are not clogged. If any silencer is clogged, replace it with a new silencer.
l Replace the filter elements of the filters.
l nspect and determine the state of the desiccant. If the desiccant is brown (this indicates oil pollution) or if there is a
lot of dust in the desiccant (this condition is caused by disintegration of the desiccant), then change the desiccant (see
following section).
l Replace the O-rings of the top and bottom blocks.
Note: The compressor and the dryer must be shut down when the state of the desiccant and the state of the O-rings are
inspected. It is recommended that all personnel present wear dust masks when desiccant is replaced.
INSTRUCTION MANUAL - Dryspell Plus
Reference : Manual Version
16
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