Beko DRYPOINT AC Series User manual

DRYPOINT® AC 410 – 495
DRYPOINT® AC 410 – 495 MS
EN – English
06-057
Cold-regenerated adsorption dryer with dew point control
Installation and operating manual

Installation and operating manual EN
2 DRYPOINT®AC 410 – 495 | DRYPOINT®AC 410 – 495 MS

EN Installation and operating manual
DRYPOINT®AC 410 – 495 | DRYPOINT®AC 410 – 495 MS 3
Contents
1. Safety warnings and instructions.................................................................................................................. 5
1.1. Pictograms and symbols ........................................................................................................................... 5
1.2. Signal words according to ISO 3864 and ANSI Z.535............................................................................... 5
1.3. General safety instructions........................................................................................................................ 6
1.3.1. Safety precaution during plant operation ....................................................................................... 8
1.3.2. Risk of injury from electric energy .................................................................................................. 8
1.3.3. Risks from adsorbents ................................................................................................................... 9
1.3.4. Safety instructions for maintenance work .................................................................................... 10
1.4. Transport and storage ............................................................................................................................. 11
1.5. Intended use............................................................................................................................................ 13
1.5.1. Warranty and liability .................................................................................................................... 14
1.5.2. Duties of the plant operator.......................................................................................................... 14
1.5.2.1. Safety ........................................................................................................................... 14
1.5.2.2. Plant operation ............................................................................................................. 14
1.5.3. Duties of personnel ...................................................................................................................... 14
2. Product information ...................................................................................................................................... 14
2.1. Scope of delivery..................................................................................................................................... 14
2.2. Type plate................................................................................................................................................ 15
2.3. Product overview and description ........................................................................................................... 15
2.3.1. Operating principle of adsorption dryer ........................................................................................ 15
2.3.1.1. Prelter with condensate drain ..................................................................................... 15
2.3.1.2. Afterlter ....................................................................................................................... 15
2.3.2. Function of DRYPOINT®AC 410 – 495 ...................................................................................... 16
2.3.2.1. Adsorption..................................................................................................................... 16
2.3.2.2. Regeneration................................................................................................................ 16
2.3.2.3. Pressure build-up ........................................................................................................ 17
2.3.2.4. Switching over of plant ................................................................................................. 17
2.3.2.5. Intermittent operation ................................................................................................... 17
2.3.3. Control and display elements....................................................................................................... 17
2.3.4. Display (standard version) ........................................................................................................... 17
2.3.4.1. Service messages (standard version) .......................................................................... 17
2.3.4.2. Acknowledging service messages (standard version).................................................. 19
2.3.5. Text display (dew point control version) ....................................................................................... 21
2.3.5.1. Button functions............................................................................................................ 21
2.3.5.2. Display layout ............................................................................................................... 21
2.3.5.3. Second level (with SET button) .................................................................................... 23
2.4. Parts and components ............................................................................................................................ 24
2.5. Dimensions.............................................................................................................................................. 25
2.6. Technical data ......................................................................................................................................... 26
3. Installation...................................................................................................................................................... 27
3.1. Warning ................................................................................................................................................... 28
3.2. Installation area ....................................................................................................................................... 28
3.3. Bypass line (optional) .............................................................................................................................. 29
3.4. Connection to compressed air system .................................................................................................... 29
3.4.1. Compressed air quality ................................................................................................................ 29
3.5. Intermittent operation .............................................................................................................................. 29
4. Electrical installation..................................................................................................................................... 30
4.1. Warning ................................................................................................................................................... 30
4.2. Connection PCBs .................................................................................................................................... 31
4.2.1. Basic control PCB ........................................................................................................................ 31
4.3. Connection to power supply .................................................................................................................... 32
4.4. Function of electrical control.................................................................................................................... 32

Installation and operating manual EN
4 DRYPOINT®AC 410 – 495 | DRYPOINT®AC 410 – 495 MS
4.4.1. Standard control........................................................................................................................... 32
4.4.2. Load-dependent control (dew point control)................................................................................. 32
4.4.3. Time control.................................................................................................................................. 33
4.4.4. Dew point control (optional) ......................................................................................................... 33
4.5. Alarm states............................................................................................................................................. 33
4.6. Alarm inputs............................................................................................................................................. 34
4.7. Software-generated alarms (with dew point control only) ....................................................................... 34
4.8. Intermittent operation .............................................................................................................................. 34
4.9. Behaviour in the event of a power failure ................................................................................................ 34
5. Start-up........................................................................................................................................................... 34
5.1. Commissioning........................................................................................................................................ 34
6. Operation........................................................................................................................................................ 35
6.1. Operating mode....................................................................................................................................... 35
6.2. Service mode .......................................................................................................................................... 35
7. Maintenance and servicing........................................................................................................................... 36
7.1. Maintenance intervals ............................................................................................................................. 36
7.1.1. Filter elements.............................................................................................................................. 36
7.1.2. Adsorbent ..................................................................................................................................... 36
7.1.3. Service inspection tasks .............................................................................................................. 36
7.1.4. Service intervals........................................................................................................................... 36
7.1.5. Service tasks................................................................................................................................ 36
7.2. Maintenance schedule ............................................................................................................................ 37
7.3. Replacing lter elements ......................................................................................................................... 37
7.4. Maintenance of BEKOMAT®20 FM condensate drain............................................................................ 39
7.5. Maintenance of 2/2-way solenoid valve .................................................................................................. 40
7.5.1. Installation .................................................................................................................................... 40
7.5.2. Electrical connection .................................................................................................................... 40
7.5.3. NC function .................................................................................................................................. 41
7.5.4. Troubleshooting............................................................................................................................ 41
7.5.4.1. Replacing solenoid ....................................................................................................... 41
7.5.4.2. Replacing diaphragm ................................................................................................... 41
7.5.4.3. Replacing magnet armature (NC function)................................................................... 42
7.5.4.4. Replacing manual assisted actuation device ............................................................... 42
7.5.4.5. Figure: Spare parts ...................................................................................................... 42
7.6. Maintenance of shuttle valves ................................................................................................................ 43
7.7. Replacing adsorbent ............................................................................................................................... 45
7.8. Spare parts.............................................................................................................................................. 46
8. Troubleshooting and repair .......................................................................................................................... 47
8.1. Possible causes of faults......................................................................................................................... 47
8.2. Troubleshooting of BEKOMAT®20 FM ................................................................................................... 49
9. Shutting down plant...................................................................................................................................... 49
9.1. Depressurising plant................................................................................................................................ 50
10. Dismantling and disposal........................................................................................................................... 50
11. Declaration of Conformity........................................................................................................................... 51

EN Installation and operating manual
DRYPOINT®AC 410 – 495 | DRYPOINT®AC 410 – 495 MS 5
1. Safety warnings and instructions
1.1. Pictograms and symbols
In this documentation
General instructions
Observe installation and operating instructions
General hazard symbol (danger, warning, caution)
Warning: electric voltage
Wear respiratory protection mask
Wear hearing protection
Wear safety goggles
About the plant
Observe installation and operating instructions
(on type plate)
1.2. Signal words according to ISO 3864 and ANSI Z.535
DANGER Imminent danger
Consequences of non-compliance: serious or even fatal injury
WARNING Potential danger
Consequences of non-compliance: possible serious or fatal injury
CAUTION Imminent danger
Consequences of non-compliance: injury and/or damage to property
NOTE Additional notes, tips and hints
Consequences of non-compliance: ine󰀩cient operation, extra maintenance work.
No risk to persons.

Installation and operating manual EN
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1.3. General safety instructions
NOTE Installation and operating manual
Before reading this manual, make sure that it refers to your plant model. This document
contains important information and instructions for the safe operation of the plant. Before
carrying out any work with or on the plant, all specialist technical personnel ¹ must have read
this manual.
A copy of this operating manual must be kept near the plant where it is at all times accessible
to sta󰀨.
In addition to the instructions in this document, always comply with the statutory regulations
for machine operation, accident prevention and safety. This also applies to the use of
accessories and spare parts.
DANGER Insu󰀩cient qualication
Improper handling and operation of the plant might result in serious or even fatal injury, and/
or damage to property.
• All tasks described in this installation and operating manual must be performed by
specialist technical personnel1who meet the following criteria:
• Before carrying out any work with or on the plant, all specialist technical personnel¹ must
have read and understood the contents of this installation and operating manual. It is the
responsibility of the owner of the plant to ensure that the above requirement is complied
with.
DANGER Escaping compressed gas
Risk of serious or even fatal injury from contact with escaping compressed gas or unsecured
plant components.
• Before carrying out any installation or maintenance work, depressurise the system.
• Use only pressure-resistant installation material and suitable tool that are in proper
working order.
• Before pressurising the system, check all plant components and repair them, if necessary.
Open valves slowly to prevent pressure blows during operation.
• The feed pipes must be permanently installed. Drain pipe: short, properly secured
pressure hose attached to pressure-resistant pipe.
• Make sure that no persons can be injured or objects damaged by condensate or escaping
compressed gas.
• Prevent transmission of vibration and impacts on plant components.
• Perform a leakage test.
DANGER Use of unsuitable tools
If unsuitable tools are used, there is a risk of plant malfunction, potentially resulting in injury
and/or damage to property.
• When serving and repairing the plant, use only tools that are in proper working order and
have been approved for the respective task.
• If you require special tools for certain tasks, contact the manufacturer.
DANGER Modications to the plant
Structural modications to the plant might result in serious injury and/or damage to property.
• Any modications to the plant must be made by the manufacturer, or after consultation
with the manufacturer.
• Work on pressure vessels and pipelines such as welding, structural modications,
assembly work, etc. is prohibited, unless you have obtained the prior consent of the
manufacturer and, if required, of the notied body. Such modications shall void the
Declaration of Conformity.
1 Specialist technical personnel
Specialist technical personnel are persons who, due to their professional qualication and knowledge in the eld of measuring,
control and pneumatic technology, and their knowledge of the applicable statutory regulations, guidelines and standards are in
a position to foresee potential dangers in relation to the use of the plant, and who are qualied to perform the tasks described
in this manual. Special operating conditions (e.g. plant operation with aggressive media) require additional knowledge.

EN Installation and operating manual
DRYPOINT®AC 410 – 495 | DRYPOINT®AC 410 – 495 MS 7
DANGER Disabling of safety devices
If safety devices are disabled or not working properly, there is a risk of serious injury, plant
malfunction and/or damage to property.
• Never disable or bridge the safety devices of the plant.
• Safety devices that prevent operation of the plant at inadmissible conditions (e.g.
excessive pressure or temperature) are not included in the standard scope of delivery.
• Should they be supplied as installed accessories, they must never be disabled
• or bridged.
DANGER Excessive pressure / temperature
Suitable measures must be taken to ensure that the pressure in the plant components does
not exceed the permissible operating pressure.
• It is the responsibility of the plant operator to protect the plant against excessive pressure
build-up.
• Take suitable measures to protect the compressor and the compressed air system
downstream of the adsorption dryer.
• Take suitable technical precautions to ensure that the temperature at operating pressure
does not exceed the maximum permissible operating temperature of the individual
components.
• The plant operator must take suitable measures to ensure that the temperature of the
incoming gas does not exceed the maximum permissible operating temperature of the
plant.
• If the plant is pressurised to operating pressure, the operator must ensure that the
maximum permissible operating temperature is not inadvertently exceeded by ambient
conditions at the site of installation.
DANGER Fire safety
A re in the plant might result in serious injury or damage to materials.
• Safety devices that prevent excessive pressure build-up as a consequence of a re are
not included in the standard scope of delivery.
• If there are potential ignition sources at the place of installation of the plant, the operator
must take suitable safety measures to ensure that the permissible operating parameters
of the plant are not exceeded.
NOTE Pressure vessel – stress from alternating loads
The alternating load rate per year depends on the plant cycle times and the type of the plant.
The plant design is based on a service life of 10 years.
• In Germany, the pressurised walls must be tested at least every 5 years (internal test),
and strength test (pressure test) must be completed at least every 10 years.
• Observe the statutory regulations that apply at the place of installation of the plant and
schedule all necessary tests with the respective notied body.

Installation and operating manual EN
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1.3.1. Safety precaution during plant operation
Compliance with the statutory safety and operating regulations is a prerequisite for trouble-free and safe operation
of the plant. Strictly adhere to all applicable internal work instructions.
• The plant must be regularly inspected for visible damage.
• Faults and defects that might impair its safety must be eliminated without delay. In the event of malfunction,
follow the instructions in “8. Troubleshooting and repair”. Should you be unable to resolve the problem, contact
the manufacturer.
• The plant, including its control system, must only be operated by suitably trained and instructed personnel.
DANGER Manual pressure relief during operation
Manual pressure relief during plant operation might result in serious injury and/or damage to
property.
• Never open the manual pressure relief ball valves while the plant is in operation.
WARNING Blow-o󰀨 noises during pressure release
When compressed gas is released, it expands, which can be result in a loud noise.
• Therefore always wear hearing protection!
1.3.2. Risk of injury from electric energy
DANGER Electric power
Incorrect connection or damaged components can cause serious or even fatal injury.
• All work on electrical connections and devices must be performed by authorised specialist
technicians and according to DIN VDE regulations (or equivalent national regulations) and
the instructions of the utility company.
• If work needs to be performed on powered parts, a second person must be deployed to
shut down the main switch, should it be required.
• Cordon o󰀨 the working area and set up warning signs.
• Use only insulated tools.
• The electrical equipment of the plant must be tested regularly.
• Use only original fuses of the correct rating.

EN Installation and operating manual
DRYPOINT®AC 410 – 495 | DRYPOINT®AC 410 – 495 MS 9
1.3.3. Risks from adsorbents
The adsorbents (desiccants) are contained in the adsorbers (see “2.4. Parts and components”).
The adsorbent has been chosen with reference to the processing system and drying task. Use only adsorbents
supplied by the plant manufacturer.
Adsorbents are chemicals that need to be handled with the necessary care (DIN safety data sheet). The
adsorbents used in your plant are not subject to the labelling requirements according to the German Hazardous
Substances Ordinance. All adsorbents must be stored in a room that is only accessible to trained and instructed
personnel.
WARNING Health risk from adsorbents
Risk of injury to eyes and injury from ingestion
• In the case of contact with the eyes, rinse thoroughly with plenty of water. Always consult
a doctor.
• After ingestion, immediately consult a doctor.
• Spilled adsorbent must be removed without causing airborne dust.
• When removing or adding adsorbent to the absorption dryer, wear a dust mask
(recommended protection class: P2 or FFP2) and safety goggles.
NOTE Handling of adsorbents in the event of a re
There are no restrictions regarding extinguishing agents. The adsorbent might however react
with water or foam.

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1.3.4. Safety instructions for maintenance work
All persons involved in the installation, start-up, operation or maintenance of the plant must have read and fully
understood the installation and operating instructions, and in particular the safety instructions. If you have any
queries, please contact the manufacturer.
The manufacturer shall not be liable for damage caused by incorrect installation, assembly or start-up of the plant.
The plant operator shall be solely responsible for such damage.
The responsibilities for maintenance work must be clearly assigned. Before carrying out any maintenance work,
inform the operating personnel.
All prescribed conguration, maintenance and inspection tasks must be carried out by customer service technicians
of the manufacturer and according to the schedule.
Strictly adhere to all instructions regarding the maintenance of the plant.
DANGER Maintenance work during plant operation
Carrying out maintenance work while the plant is in operation poses an increased risk to
persons.
• For certain maintenance tasks, the plant must be completely shut down, de-energized
and depressurised.
• Shut down the plant, following the relevant instructions.
• Depressurise the plant.
• Disconnect it from the electric power supply, secure it against inadvertent switching on
and attach a warning sign
• to the main switch.
• If guards need to be removed, let the plant cool down before carrying out any further
work. Before restarting the plant, mount and secure the guards and insulation.
DANGER Improper replacement of components
Incorrect replacement of components can cause serious or even fatal injury.
• We strongly recommend having damaged or wearing parts replaced by a customer
service technician of the manufacturer.
• After completion of the maintenance work, perform a leakage test.
• To replace large assemblies, use lifting gear and secure the parts properly before moving
them! Use only lifting gear lashing equipment that is in proper working order and has the
necessary load capacity!
DANGER Assembly work above head height
Assembly work above head height can cause serious or even fatal injury.
• For all such work, use safety-approved ladders and work platforms!
• Never use machine parts as climbing aids! Risk of injury from fall!
• For all maintenance work above a height of 1.80 m, wear fall arrest equipment!
NOTE Use of unsuitable or damaged components
The use of unsuitable or damaged components can cause malfunction of the plant.
• If you detect any serious damage to the pressure devices, shut them down and remove
them immediately!
• Replace damaged components with new ones.
• Replace wearing parts according to the prescribed schedule in the devices and spare
parts list or in chapter “7.2. Maintenance schedule”. This list is an integral part of these
installation and operating instructions.
• Use only original spare and accessory parts supplied by the manufacturer. Third-party
components might not meet the necessary stress and safety standards.

EN Installation and operating manual
DRYPOINT®AC 410 – 495 | DRYPOINT®AC 410 – 495 MS 11
1.4. Transport and storage
DANGER External forces and torques
The plant must be protected against external forces and torques, as these could cause
damage, leading to leakage or even malfunction of the plant.
•
• Ensure that no external forces and torques are transferred to the plant through the on-
site piping system. Otherwise, the permissible load on the system might be exceeded.
If necessary, the plant operator must carry out tests or make modications to the on-site
installations.
• The adsorption dryer must be protected against vibration caused by other units. If
necessary, the operator must take suitable measures to prevent the propagation of
vibration.
WARNING Uneven load distribution
There is a high risk of serious injury when the plant is being transported with lifting gear.
• The angle between the perpendicular and the ropes must at all times be greater than 45°.
Otherwise, the piping system might be damaged so that it is no longer tight, and there is a
risk of serious malfunction of the plant.
• Never lift the plant by the pipes. Otherwise, the piping system might be damaged so that it
is no longer tight, and there is a risk of serious malfunction of the plant.
NOTE Labels on packaging
Observe the labels on the packaging.

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NOTE Damage caused during transport or storage
Incorrect transport or storage, or the use of unsuitable lifting equipment might cause damage
to the plant.
• The plant must only be transported and stored by authorised and suitably trained
specialist technical personnel.
• If you detect any damage, do not start the plant.
• Always adhere to the specied transport and storage temperatures.
• Special care is required during transport and when loading and unloading the plant!
Never use force!
• Ensure that the permissible maximum load of the lifting gear used at the operator's
premises is not exceeded.
• When transporting the plant with a lift truck, lift the plant by its support frame or the
proled timber frame.
NOTE Transport of plant by its pipes
Never lift the plant by the pipes, as this might result in leakage or serious malfunction of the
plant.
• Lift the plant only by the lashing points provided, using suitable lifting gear.
The DRYPOINT® 410 – 495 adsorption dryers are shipped in a cardboard box and on a proled timber frame.
Despite our best e󰀨orts regarding packaging, etc., the plant might be damaged during transport. Upon receipt,
please remove all packaging material and inspect the plant for visible damage. If you detect any such damage,
immediately notify the carrier company and BEKO TECHNOLOGIES GMBH or one of its agents.
To store the plant, place it in its original packaging and
store it in an enclosed, dry and frost-free room. Ensure
that the storage temperature does not exceed the limits
specied on the type plate.
Even when packaged, take suitable measures to
protect the plant against the elements.
While in storage, secure the plant so that it cannot
topple over or fall, and protect it against vibration.
NOTE Recycling of packaging material
• The packaging material is recyclable. Dispose of the packaging material according to the
applicable statutory regulations.

EN Installation and operating manual
DRYPOINT®AC 410 – 495 | DRYPOINT®AC 410 – 495 MS 13
1.5. Intended use
DANGER Improper use
Improper use can result in serious injury and damage to property.
• Only use the plant for its intended purpose.
DANGER Operation of plant outside limit range
If the specied limits are exceeded, there is a risk of plant malfunction, potentially resulting in
injury and/or damage to property.
• The plant must only be operated for the intended use and within the permissible limits
specied on the type plate and in the technical data.
The plant must only be used for the intended purpose. The adsorption dryer has been specically designed for the
drying of compressed air or nitrogen and must not be used for any other purpose.
The manufacturer shall not be liable for damage cause by improper use of the plant.
The medium to be dried must not contain any corrosive substances that might cause damage to the materials in
the adsorption dryer. To prevent unavoidable corrosion on carbon steel components during proper plant operation,
a 1 mm corrosion allowance or suitable coating has been applied.
The manufacturer guarantees that only materials suitable for the purpose have been used for the production of the
plant. If the plant operator requests the use of certain materials for specic plant components, it is the operator's
responsibility to ensure that these materials are suitable for the intended use.
The pressure and the temperature of the medium must conform to the specications on the type plate and in this
installation and operating manual!
The plant is not designed to withstand loads from tra󰀩c, wind or earthquakes. In the event of such a load, take
suitable measures to protect the plant against the impact.
The manufacturer shall not be liable for damage and/or injury caused by non-compliance with the instructions
above or the general applicable safety rules and regulations. The manufacturer's liability shall also not apply, if the
adsorption dryer is operated without the necessary care or if best practice is not followed.
In order to ensure safe and trouble-free operation of the plant, always observe the safety instructions and other
information in this document.
Remember that the safety warnings and instructions always also refer to your personal safety!
For the operation of the adsorption dryer, strictly adhere to the relevant occupational safety and accident prevention
regulations and the instructions in this installation and operating manual. The adsorption dryer has been designed
and built according to best practice.
It conforms to the European Low Voltage Directive 73/23/EEC.
The design/development, production, assembly of this plant as well as all customer services are subject to the
certied quality assurance system of the manufacturer according to DIN ISO 9001/EN 29001.

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1.5.1. Warranty and liability
All warranty and liability for injury or damage to property shall be voided, if it is caused by:
• Improper use of the plant
• Incorrect installation, start-up, operation and maintenance of the plant
• Operation of the plant while it is obviously defective
• Non-compliance with the instructions in this document regarding transport, storage, installation, start-up and
maintenance of the plant
• Unauthorised modications to the plant
• Insu󰀩cient inspection or monitoring of plant components that are subject to wear
• Incorrectly performed repairs
• Use of third-party components
Please also observe the general warranty terms and conditions of the manufacturer.
1.5.2. Duties of the plant operator
The plant operator must ensure that the plant is commissioned by personnel who are familiar with the relevant
safety instructions and trained in the operation of the plant. The instructions include in particular:
1.5.2.1. Safety
• Accident prevent regulations
• General and plant-specic safety instructions
• Safety devices of the plant
• Emergency procedures
1.5.2.2. Plant operation
• Proper procedures for plant commissioning and start-up
• Emergency procedures
• Plant shut-down
1.5.3. Duties of personnel
All persons who are involved in the operation of the plant must
• comply with the general occupational safety and accident prevention
• regulations and must have read the installation and operating manual.
• All instructions in this document must be strictly adhered to.
2. Product information
2.1. Scope of delivery
Figure Description
DRYPOINT®AC, complete

EN Installation and operating manual
DRYPOINT®AC 410 – 495 | DRYPOINT®AC 410 – 495 MS 15
2.2. Type plate
The type plate is attached to the container of the DRYPOINT®AC.
Manufacturer:
BEKO TECHNOLOGIES GmbH
Im Taubental 7
D-41468 Neuss
Art-Nr.
Item number
N° d´article
Anlage
Plant
Installation
Betriebsdruck
Operating pressure
Pression de fonctionnement
Serien-Nr.
Serial-no.
N° de serie
Baujahr
Year of manufacture
Anne de fabrication
Spannung / Leistungsaufnahme
Voltage / Power consumption
Voltage / Consommation électrique
Betriebstemperatur
Operating temperature
Temperature de service
Vorfilterelement
Prefilter element
Element du filter amont
Umgebungstemperatur
Ambient temperatur
Temperature ambiente
Nachfilterelement
Afterfilter element
Element du filtre à poussieres
Schutzklasse / Schutzart
Protection class / Type of protection
Classe de protection / Type de protection
xxxxxxxxxx xxxxxxxxxxx
xx / 20xx
230 V - 50-60 Hz / 40 W
min. 5 °C / max. 50 °C
min. 4 °C / max. 50 °C
xxx
DP AC xxxx
1. xxx
2. N/A
3. N/A
I / IP54
min. 4 bar / max. 16 bar
NOTE Handling of type plate
Do not remove or cover the type plate, and protect it against damage.
2.3. Product overview and description
2.3.1. Operating principle of adsorption dryer
2.3.1.1. Prelter with condensate drain
The medium to be dried is pre-ltered by a high-performance submicro lter. Oil, water and dirt particles are held
back by the micro-bre eece to a rate of 99.99998% for dirt particles larger than 0.01 µm.
The micro-bre eece is encased in a coalescing lter jacket and the medium ows from the inside outwards. In the
coalescing lter, the liquid aerosols and mists form larger droplets, which then drop into the bottom part of the lter
housing from where they are removed through the condensate drain from the system.
After the preltration stage, the residual oil content is smaller than 0.01 mg/m3(at a max. infeed concentration of
3 mg/m3).
2.3.1.2. Afterlter
The downstream dust lter removes ne dust with a particle size of < 25 µm from the compressed air.

Installation and operating manual EN
16 DRYPOINT®AC 410 – 495 | DRYPOINT®AC 410 – 495 MS
2.3.2. Function of DRYPOINT®AC 410 – 495
PI
1
PDI
2
PI
2
9
6
4
8
8
Y1 Y2
3
11 77
55
22
11
Ko Ro Ro
J
O
22
MIAH 02
Atmosphäre
Atmosphere
13
14
9
MISH 01
101
101
MT
101
PDI
112
Option Taupunktsteuerung
J : Feuchtluft Eintritt / Wet Air Inlet
O : Trockenluft Austritt / Dry Air Outlet
R : Regenerationsluft Austritt / Regeneration Air Outlet
Ko : Kondensat Austritt / Condensate Outlet
2.3.2.1. Adsorption
The plant is an adsorption dryer with alternating adsorption and regeneration phases.
The two adsorbers are operating alternately. While one absorber dries the medium, the other one is regenerated.
This process ensures uninterrupted operation of the adsorption dryer.
The medium to be dried enters the prelter (3) through the wet gas inlet (J). In the prelter, condensate, oil aerosols
and dirt particles are removed by a high-performance microlter.
The medium is then fed through the lower shuttle valve (9) and the lower ow distributor (2) into the vessel of one
of the adsorbers (1) and then ows from the bottom to the top of one adsorber.
At the top of the adsorber, the dried medium ows through the upper ow distributor (2) and the upper shuttle valve
(9) into the afterlter (4).
In the afterlter, ne dust particles and any abrasion residue of the adsorbent are removed by the dust lter and the
dried and cleaned medium is fed to the dry gas outlet (O) where it enters the compressed air system.
2.3.2.2. Regeneration
The adsorbent is regenerated by means of a partial ow of the dried medium.
To start the regeneration process, the 2/2-way solenoid valve (5) at the regeneration gas outlet is opened. As a
result, the adsorber is depressurised to ambient pressure. The compressed air is released through the silencers (7)
from the system.
A partial ow of the dry medium ows from the adsorber in adsorption mode through the bypass line into the upper
piping, and from there down through the adsorber to the regenerated. At the bottom of the adsorber, the medium is
released into the atmosphere through the silencers (7).
The regeneration gas volume is limited by the orice (6).

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DRYPOINT®AC 410 – 495 | DRYPOINT®AC 410 – 495 MS 17
2.3.2.3. Pressure build-up
At the end of the regeneration process, the 2/2-way solenoid valve (5) at the regeneration gas outlet is closed.
The pressure in the regenerating adsorber is built up through the bypass line in the upper piping.
Until the switch-over is started, the regenerated adsorber remains at operating pressure in stand-by mode.
2.3.2.4. Switching over of plant
Depending on the operating mode selected at the text display of the electronic control unit, the switch-over is time-
controlled or load-controlled (see “2.3.3. Control and display elements”).
2.3.2.5. Intermittent operation
If the compressor is operated in discontinuous (intermittent) mode, the plant control can be linked to the
compressor control. This ensures that the plant regeneration is not interrupted.
After completion of the pressure build-up and no compressed air is consumed, the plant remains in stand-by mode.
To couple the plant control to the compressor control, connect the oating NO contact of the compressor to the
clamping strips X12 (digital input) of the control PCB. The contact must be closed when the compressor is not
running.
Stand-by state is indicated on the standard control unit by an LED. In the version with dew point control, it is
indicated in plain text.
This operating mode is only available, if the plant is installed directly downstream of the compressor, and there is a
storage tank downstream of the plant that is large enough to allow for the completion of the regeneration process in
the adsorption dryer without a need to start the compressor.
2.3.3. Control and display elements
2.3.4. Display (standard version)
After successful start-up, the current operating state of the plant is indicated by LEDs on the display.
The plant is controlled automatically and no further operator intervention is required.
1
2
3
4
5
6
1 Adsorber LEDs left
2 Adsorber LEDs right
3 Power LED
(ashing during intermittent operation)
4 Service LED
5 Alarm LED
6 Acknowledge button behind foil
(for service mode)
2.3.4.1. Service messages (standard version)
There are two sets of service indicators: the service LED in running mode and the adsorber LEDs.
The various signals are indicated by 3 di󰀨erent symbols:
Indication by service LED in running mode (ashing):
Service A = short-long / service B = short-long-long-long.
Indication by service LED in service mode:
3 seconds on, or 3x ashing briey
Indication by adsorber LED in service mode (ashing):
The service message is active, i.e. the time for a service
has been reached.
Indication by adsorber LED in service mode (continuously lit):

Installation and operating manual EN
18 DRYPOINT®AC 410 – 495 | DRYPOINT®AC 410 – 495 MS
The service message is not active, i.e. the time for a service is not yet reached. In running mode, the LEDs indicate
the current operating state.
Service indication in running
mode:
The service LED ashes and the
respective adsorber LEDs are
continuously lit, indicating the
current operating state.
Switching to service mode
Press and hold for 3 seconds; the
service LED is continuously lit for 3
seconds and then switched o󰀨
Note: In service mode, the adsorber
LEDs donot indicate the operating state
.
Service indication in service mode:
Service A (active) Service B (active)

EN Installation and operating manual
DRYPOINT®AC 410 – 495 | DRYPOINT®AC 410 – 495 MS 19
2.3.4.2. Acknowledging service messages (standard version)
Example: Service A (active)
Acknowledgement
Press and hold the button for 3
seconds; when the button is released
the service LED ashes briey 3x
Left adsorber LEDs are o󰀨
No button pressed Service mode is terminated
automatically after 5 seconds
Go to service messages
Service B (not active)

Installation and operating manual EN
20 DRYPOINT®AC 410 – 495 | DRYPOINT®AC 410 – 495 MS
Service B is indicated; LEDs are
continuously lit, as service B is not
yet active (time to service has not yet
elapsed).
Press the button 1x
Press the button 1x It is possible to reset a not yet active
service message*
The adsorber LEDs are o󰀨.
Indication only available again after 1
hour.
Press and hold the button for 3
seconds; the service LED ashes
briey 3x
Go to next service message by
pressing the button briey 1x
or wait for 5 seconds until service
mode is terminated automatically
* Purpose of function:
Service B might be carried out at the same time as service A, even if service B is not yet due. In this case, service
messages that have not yet been activated must be acknowledged in order to set the operating hours counter to
"0".
** Note:
Upon a start-up and after acknowledging or resetting an active/not active service in service mode, the adsorber
LEDs are only lit permanently after 1 hour has elapsed, which means that acknowledging is only possible by exiting
the service mode and calling it up again.
NOTE Exceeding service intervals A and B
As the time intervals between service A and service B might overlap, acknowledging service
A might result in an acknowledgement of service B.