Trident Dryspell 5, Dryspell 10 Installation, Operation & Maintenance Manual
MANUAL
INSTALLATION OPERATION MAINTENANCE
Regenerative Type Heatless Desiccant Dryer
Dryspell
Contents
1. Introduction 2
1.1 Design
1.2 Relevant Units
1.3 Statement of Conformity
1.4 Description
1.5 Adsorbant Material
1.6 Operating Principles
1.7 Safety
2. Installation 4
2.1 Caution
2.2 Storage
2.3 Installation Site and Connections
2.4 Electrical Connections
2.5 Running the Installation
3. Operation 6
3.1 Operator
3.2 Control Panel
3.3 Operating Cycles Time
3.4 How to Stop the Dryer
4. Maintenance 8
4.1 Monthly Inspections
4.2 Half-yearly Inspections
4.3 Annual Inspections
5. Changing the desiccant 9
5.1 Quantity of Desiccant in the Dryer
6. Repair work 9
6.1 LED’s not Glowing
6.2 Tower Status LED not Changing
6.3 LED’s Status Changes but Tower not Switching
6.4 No Purging
6.5 Continuous Purging at Tower 1
6.6 High Purge Loss
6.7 High Pressure Drop Across Dryer
7. Diagrams 11
7.1 Operation Diagram
7.2 Overall Dimensions 12
7.3 How to Increase your Compressed Air Quality
7.4 Typical Layout of Compressed Air System
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Reference : Manual Version 2
READ THIS MANUAL CAREFULLY
BEFORE INSTALLING OR OPERATING THE EQUIPMENT
These symbols warn you of any dangers and the measures to be taken to prevent
them.
The most important points for the correct operation of your dryer are printed in bold type.
1. Introduction
Dryspell series is a heatless adsorption air dryer range especially made for small compressed air flow treatment. Compact and easy to maintain, each dryer is equiped with
a pre-filter 0.3micron to protect the dessicant from the variety of air compressed pollutant and with After filters.
1.1 DESIGN
Dryspell heatless regenerating adsorption dryers make it possible to eliminate any water
vapour remaining in the compressed air at the outlet of the compressor + final condenser
assembly. The dryers have been designed under nominal standard conditions in order to
obtain a dew point of -40oC.
1.2 RELEVANT UNITS
This manual describes the following models :
Dryspell
Model Nominal Flow cfm
5 5
10 10
1.3 STATEMENT OF CONFORMITY
The units listed above comply with the current legislation and, in particular, with the
following European directives :
l 97/23/CE : Pressurised Equipments
l 89/392/CEE : Machine Safety
l 89/336/CEE : Electromagnetic Compatibility
l 73/23/CEE : Low Voltage
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2
INSTRUCTION MANUAL - Dryspell
This Document may be modified without notice
reproduction, even partial, forbidden without written Authentication
1.4 DESCRIPTION
The dryer consists of :
l 2 aluminium tanks filled with desiccant
l 2 solenoid valves
l 2 exhaust silencers
l 1 regeneration nozzle
l 1 electronic control panel
l 2 aluminium blocks including air seals and non return valve
l 1 pressure gauge
l 1 sub-micron pre-filter (0.3 to 0.6 micron)
l 2 After filters
1.5 ADSORBANT MATERIAL
The desiccant takes the form of highly porous particles with surfaces which are able to
retain (adsorb) the water vapour present in the compressed air (drying phase) and
restore it when the air is at atmospheric pressure (regeneration phase). The desiccant
used is activated alumina (CD067A).
1.6 OPERATING PRINCIPLES
The two columns operate alternately in the drying and regeneration phases. Regeneration in one tank results from the expansion to atmospheric pressure of part of the dry
compressed air in the other. The pressure reducer is responsible for this transfer. Under
nominal conditions (service pressure of 7 bars), 10% of the nominal flow is depressurised.
The regeneration phase is shorter than the drying phase in order to allow the regenerated
column to return to service pressure before a new cycle starts.
1.7 SAFETY
Pressurised tanks may explode if used improperly. It is therefore essential to
locate any equipment which contains one or more of such tanks in such a
way that the risks relating to incorrect use are reduced to the absolute
minimum.
The person responsible for the staff who is going to install, operate and maintain the
machines described in this manual must make sure that they have read and understood
these instructions.
In particular we draw your attention to the safety procedures which are described in this
manual and which must be scrupulously adhered to. Observing these measures will
allow you to install, operate and maintain your dryer without risk.
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Reference : Manual Version 2
!
Dryspell dryers are intended for the drying of compressed air. Under no circumstances
should they be used to dry other gases before Trident has performed a preliminary study
and provided special instructions.
The desiccants used are non toxic. However, they may cause respiratory problems if they
are inhaled in dust form. The use of a dust mask is sufficient to protect personnel. If
dispersed in the environment, desiccants may represent a source of pollution the
consequences of which are uncontrollable. By the end of its lifetime, the desiccant will
have accumulated all the pollutants present in the compressed air. Use a non-polluting
method of disposal.
2. Installation
Various risks (crushing, explosion, projection, noise,…): The installation
operations described in this chapter should be performed only by personnel
qualified in the installation of electro-pneumatic systems. Follow the procedure
described below with care in order to prevent exposing personnel to danger.
2.1 CAUTION
(i) Ensure that the compressor drain port is provided with an automatic drain valve.
(ii) If the inlet temperature is more than specified (40oC) then install an after cooler with
moisture seperator between compressor and dryer.
(iii) Ensure that a microfilter of 0.01 micron is provided after the dryer as a precautionary
instrument.
2.2 STORAGE
If your dryer is about to be stored during a long time before installation and use, take care
to the following instructions :
l if possible, let the dryer in its original packing (In particular products fitted with marine
packing with plastic film and dessicant)
l checking that air inlet and outlet are correctly blocked in order to protect the dessicant
against humidity and dust.
l check that the machine is correctly protected from atmospheric dust or water.
l check that the store is frost protected
l make sure to archive correctly the attached documents.
!
4
INSTRUCTION MANUAL - Dryspell
This Document may be modified without notice
reproduction, even partial, forbidden without written Authentication
2.3 INSTALLATION SITE AND CONNECTIONS
1. Install the dryer in a closed clean, dry room protected from frost. Access to the room
should be restricted to personnel qualified in unit maintenance and operation. The room
must be adequately ventilated. The dryer must not be directly exposed to sources of heat.
The temperature of the room should not exceed 43oC.
2. Make sure that the dryer is not near any equipment which does not comply with the
electromagnetic compatibility directives and which may degrade dryer operation. There
must be a minimum distance of 1 m between the dryer and any other equipment which
uses electricity.
3. Ensure that the dryer is installed in vertical position.
4. Fix the anchor points if it's necessary.
5. Install a system of by-pass valves between the dryer inlet and outlet so as to be able to
service the installation without having to interrupt the compressed air supply from the
network (see diagram above). The upstream and downstream valves must be closed
during installation.
6. Connect the compressed air for processing to the dryer inlet (pre-filter connection) with
strain-free ducts.
7. Connect a drain pipe to the Pre-filter lower part connection (¼''F)
8. Connect the processed compressed air to the dryer output with strain-free ducts.
9. Check that all the connectors are airtight and that the fixings are tight.
5
Reference : Manual Version 2
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