INSTRUCTION BOOK

API093050
CD 100+
Atlas Copco

CD 100+
API093050

Instruction book
Original instructions

COPYRIGHT NOTICE
Any unauthorized use or copying of the contents or any part thereof is prohibited.
This applies in particular to trademarks, model denominations, part numbers and
drawings.
This instruction book is valid for CE as well as non-CE labelled machines. It meets the
requirements for instructions specified by the applicable European directives as
identified in the Declaration of Conformity.

2017 - 08

www.atlascopco.com
 Instruction book

Table of contents

1 Safety precautions..........................................................................................................4

1.1 SAFETY ICONS................................................................................................................................... 4

1.2 SAFETY PRECAUTIONS, GENERAL...........................................................................................................4

1.3 SAFETY PRECAUTIONS DURING INSTALLATION........................................................................................... 5

1.4 SAFETY PRECAUTIONS DURING OPERATION.............................................................................................. 6

1.5 SAFETY PRECAUTIONS DURING MAINTENANCE OR REPAIR........................................................................... 7

2 General description........................................................................................................ 9

2.1 GENERAL DESCRIPTION....................................................................................................................... 9

2.2 OPERATION.....................................................................................................................................10

3 Electrical diagram.........................................................................................................15

4 Installation.....................................................................................................................17

4.1 DIMENSION DRAWINGS.......................................................................................................................17

4.2 INSTALLATION PROPOSAL................................................................................................................... 17

5 Electrical connections..................................................................................................21

6 Operating instructions................................................................................................. 24

7 Maintenance.................................................................................................................. 26

7.1 MAINTENANCE................................................................................................................................. 26

7.2 RESETTING THE SERVICE TIMER.......................................................................................................... 27

7.3 DISPOSAL OF USED MATERIAL............................................................................................................. 27

8 Problem solving............................................................................................................29

9 Technical data...............................................................................................................30

9.1 REFERENCE CONDITIONS................................................................................................................... 30

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9.2 LIMITATIONS FOR OPERATION.............................................................................................................. 30

9.3 TECHNICAL SPECIFICATIONS................................................................................................................30

10 Instructions for Use......................................................................................................31

11 Guidelines for inspection.............................................................................................32

12 Pressure Equipment Directives...................................................................................33

13 Declaration of conformity............................................................................................ 34

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1 Safety precautions

1.1 Safety icons

Explanation

Danger to life

Warning

Important note

1.2 Safety precautions, general

General precautions

All responsibility for any damage or injury resulting from neglecting these precautions, or
non-observance of the normal caution and care required for installation, operation,
maintenance and repair, even if not expressly stated, will be disclaimed by the
manufacturer.

1. The dryers are designed for normal indoor use.

2. The operator must employ safe working practices and observe all related work safety
requirements and regulations.
3. If any of the following statements does not comply with the applicable legislation, the stricter
of the two shall apply.
4. Installation, operation, maintenance and repair work must only be performed by authorized,
trained, specialized personnel.
5. The dryer is not considered capable of producing air of breathing quality. To obtain air of
breathing quality, the compressed air must be adequately purified according to the
applicable legislation and standards.
6. Before any maintenance, repair work, adjustment or any other non-routine checks, stop the
dryer, press the emergency stop button, switch off the voltage and depressurize the dryer. In
addition, the power isolating switch must be opened and locked. For plug versions, remove
the plug from the wall socket and secure it.
7. Never play with compressed air. Do not apply the air to your skin or direct an air stream at
people. Never use the air to clean dirt from your clothes. When using the air to clean
equipment, do so with extreme caution and wear eye protection.
8. The owner is responsible for maintaining the dryer in safe operating condition. Parts and
accessories shall be replaced if unsuitable for safe operation.
9. It is not allowed to walk or stand on the dryer or its components.

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1.3 Safety precautions during installation

Precautions during installation

1. The dryer must only be lifted using suitable equipment and in accordance with the applicable
safety regulations. Loose or pivoting parts must be securely fastened before lifting. It is
strictly forbidden to dwell or stay in the risk zone under a lifted load. Lifting acceleration and
deceleration must be kept within safe limits. Wear a safety helmet when working in the area
of overhead or lifting equipment.
2. Place the dryer where the ambient air is as cool and clean as possible. If necessary, install a
suction duct. Never obstruct the air inlet. Care must be taken to minimize the entry of
moisture at the inlet air.
3. Any blanking flanges, plugs, caps or desiccant bags must be removed before connecting the
pipes.
4. Air hoses must be of correct size and suitable for the working pressure. Never use frayed,
damaged or worn hoses. Distribution pipes and connections must be of the correct size and
suitable for the working pressure.
5. The aspirated air must be free of flammable fumes, vapours and particles, e.g. paint
solvents, that can lead to internal fire or explosion.
6. Arrange the air intake so that loose clothing worn by people cannot be sucked in.
7. Ensure that all piping is free to expand under heat and that it is not in contact with or close to
flammable materials.
8. No external force may be exerted on the air outlet valve. The connected pipe must be free of
strain.
9. If remote control is installed, the machine must bear a clear sign stating "Danger: This
machine is remotely controlled and may start without warning".
The operator has to make sure that the machine is stopped and that the isolating switch is
open and locked before any maintenance or repair. As a further safeguard, persons
switching on remotely controlled machines shall take adequate precautions to ensure that
there is no one checking or working on the machine. To this end, a suitable notice shall be
affixed to the starting equipment.
10. Air-cooled machines must be installed in such a way that an adequate flow of cooling air is
available and that the exhausted cooling air does not recirculate to the inlet.
11. The electrical connections must correspond to the applicable codes. The machines must be
earthed and protected against short circuits by fuses in all phases. A lockable power
isolating switch must be installed near the equipment.
12. On machines with automatic start-stop system or if the automatic restart function after
voltage failure is activated, a sign stating "This machine may start without warning" must be
affixed near the instrument panel.
13. Never remove or tamper with the safety devices, guards or insulation fitted on the machine.
Every pressure vessel or auxiliary installed outside the machine to contain air above
atmospheric pressure must be protected by a pressure-relieving device or devices as
required.
14. Piping or other parts with a temperature in excess of 80˚C (176˚F) and which may be
accidentally touched by personnel during normal operation must be guarded or insulated.
Other high-temperature piping must be clearly marked.
15. For water-cooled machines, the cooling water system installed outside the machine has to
be protected by a safety device with set pressure according to the maximum cooling water
inlet pressure.
16. If no safety valve is present in the air net close to the desiccant dryer (e.g. safety valve of
compressor), full flow safety valves must be installed on the dryer vessels.

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17. If the maximum pressure of the compressor is higher than the design pressure of the dryer,
a full flow safety valve must be installed between the compressor and the dryer in order to
blow off the excessive pressure in case the safety valve of the dryer should be out of order
or blocked.
18. When unit is not permanently secured to the floor in the vertical position or mounted
horizontally, access to electrical equipment is feasible through the unit base. In this case
additional barriers must be provided during installation. Tag with "warning high voltage"
symbol

Also consult following safety precautions: Safety precautions during operation and Safety
precautions during maintenance or repair.
These precautions apply to machinery processing or consuming air or inert gas. Processing
of any other gas requires additional safety precautions typical to the application which are
not included herein.
Some precautions are general and cover several machine types and equipment; hence
some statements may not apply to your machine.

1.4 Safety precautions during operation

Precautions during operation

1. Always be careful when touching any piping or components of the dryer during operation.
On dryers using heat to regenerate the desiccant, some parts will become very hot.
2. Use only the correct type and size of hose end fittings and connections. When blowing
through a hose or air line, ensure that the open end is held securely. A free end will whip
and may cause injury. Make sure that a hose is fully depressurized before disconnecting it.
3. Persons switching on remotely controlled machines shall take adequate precautions to
ensure that there is no one checking or working on the machine. To this end, a suitable
notice shall be affixed to the remote start equipment.
4. Never operate the machine when there is a possibility of taking in flammable or toxic fumes,
vapors or particles.
5. Never operate the machine below or in excess of its limit ratings.
6. Keep all bodywork closed during operation. Bodywork should be opened for short periods
only, e.g. to carry out routine checks. Wear ear protectors when removing a panel.
7. People staying in environments or rooms where the sound pressure level reaches or
exceeds 90 dB(A) shall wear ear protectors.
8. Periodically check that:
• All guards are in place and securely fastened
• All hoses and/or pipes inside the machine are in good condition, secure and not
rubbing
• There are no leaks
• All fasteners are tight
• All electrical leads are secure and in good order
• Safety valves and other pressure relief devices are not obstructed by dirt or paint
• Air outlet valve and air net, i.e. pipes, couplings, manifolds, valves, hoses, etc. are in
good condition, free of wear or abuse
9. If warm cooling air from dryers is used in air heating systems, e.g. to warm up a working
area, take precautions against air pollution and possible contamination of the breathing air.
10. Do not remove any of, or tamper with, the sound dampening material.
11. Never remove or tamper with the safety devices, guards or insulations fitted on the machine.
Every pressure vessel or auxiliary installed outside the machine to contain air above

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atmospheric pressure shall be protected by a pressure relieving device or devices as

required.
12. Yearly inspect the air receiver. Minimum wall thickness as specified in the instruction book
must be respected. Local regulations remain applicable if they are more strict.

Also consult following safety precautions: Safety precautions during installation and Safety
precautions during maintenance or repair.
These precautions apply to machinery processing or consuming air or inert gas. Processing
of any other gas requires additional safety precautions typical to the application which are
not included herein.
Some precautions are general and cover several machine types and equipment; hence
some statements may not apply to your machine.

1.5 Safety precautions during maintenance or repair

Precautions during maintenance or repair

1. Always use the correct safety equipment (such as safety glasses, gloves, safety shoes,
etc.).
2. Use only the correct tools for maintenance and repair work.
3. Use only genuine spare parts.
4. All maintenance work shall only be undertaken when the machine has cooled down.
5. A warning sign bearing a legend such as "Work in progress - do not start" shall be attached
to the starting equipment.
6. Persons switching on remotely controlled machines shall take adequate precautions to
ensure that there is no one checking or working on the machine. To this end, a suitable
notice shall be affixed to the remote starting equipment.
7. Close the dryer air outlet valve before connecting or disconnecting a pipe.
8. Before removing any pressurized component, effectively isolate the machine from all
sources of pressure and relieve the entire system of pressure.
9. Never use flammable solvents or carbon tetrachloride for cleaning parts. Take safety
precautions against toxic vapours of cleaning liquids.
10. Scrupulously observe cleanliness during maintenance and repair. Keep dirt away by
covering the parts and exposed openings with a clean cloth, paper or tape.
11. Never weld on, or in any way modify, pressure vessels.
12. Whenever there is an indication or any suspicion that an internal part of a machine is
overheated, the machine shall be stopped but no inspection covers shall be opened before
sufficient cooling time has elapsed; this to avoid the risk of spontaneous ignition of the oil
vapor when air is admitted.
13. Never use a light source with open flame for inspecting the interior of a machine, pressure
vessel, etc.
14. Make sure that no tools, loose parts or rags are left in or on the machine.
15. All regulating and safety devices shall be maintained with due care to ensure that they
function properly. They may not be put out of action.
16. Before clearing the machine for use after maintenance or overhaul, check that operating
pressures, temperatures and time settings are correct. Check that all control and shut-down
devices are fitted and that they function correctly.
17. Protect the motor, electrical and regulating components, etc. to prevent moisture from
entering them, e.g. when steam-cleaning.

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18. Make sure that all sound-damping material and vibration dampers, e.g. damping material on
the bodywork, is in good condition. If damaged, replace it by genuine material from the
manufacturer to prevent the sound pressure level from increasing.
19. Never use caustic solvents which can damage materials of the air net, e.g. polycarbonate
bowls.
20. The following safety precautions are stressed when handling refrigerant:
• Never inhale refrigerant vapours. Check that the working area is adequately ventilated;
if required, use breathing protection.
• Always wear special gloves. In case of refrigerant contact with the skin, rinse the skin
with water. If liquid refrigerant contacts the skin through clothing, never tear off or
remove the latter; flush abundantly with fresh water over the clothing until all refrigerant
is flushed away; then seek medical first aid.
21. The following safety precautions are stressed when handling desiccant:
• Take precautions not to inhale desiccant dust.
• Check that the working area is adequately ventilated; if required, use breathing
protection.
• Do not overfill the dryer when replacing desiccant.

Also consult following safety precautions: Safety precautions during installation and Safety
precautions during operation.
These precautions apply to machinery processing or consuming air or inert gas. Processing
of any other gas requires additional safety precautions typical to the application which are
not included herein.
Some precautions are general and cover several machine types and equipment; hence
some statements may not apply to your machine.

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2 General description

2.1 General description

Introduction
The air dryers described in this book are heatless adsorption dryers, built to remove moisture
from compressed air for industrial purposes.
The standard version is intended to reach a pressure dew point of -40 ˚C (-40 ˚F). There is also a
version available for a pressure dew point of -70˚C (-94 ˚F).
All units are designed for indoor use, and altitude up to 2000 m.

CD 25+ up to CD 145+, general view

Main parts
An overview of the main parts of the dryer is given in below figures:

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Reference Description Reference Description

1 Tower A 5 Solenoid valve
2 Tower B 6 Control cubicle
3 Air inlet 7 Silencers
4 Air outlet

2.2 Operation

General
The construction of the air dryer is simple, reliable and easy to service. A dryer has basically two
towers, containing the adsorption material or desiccant. This desiccant is a very porous grain
material, able to adsorb large amounts of water vapour.

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Flow diagram CD 25+ up to CD 50+

Reference Designation Reference Designation

1 Air inlet 7 Air outlet
2 Inlet selector valve 8 Left solenoid valve
3 Left desiccant tower 9 Right solenoid valve
4 Right desiccant tower 10 Silencer
5 Purge nozzle 11 Silencer
6 Outlet selector valve PI Pressure gauge

Operation principle basic control version

The operation cycle of the dryer is repetitive and is controlled by a factory-set timer. While the
desiccant in one tower dries the compressed air, the desiccant in the second tower is being
regenerated. Regeneration of the desiccant is achieved by means of purge air from the drying
tower.
The compressed air entering the dryer is led to one of the towers by means of the bottom
selector valve. The position of the selector valve depends on the condition (activated or not) of
the solenoid valves. As the air flows upwards through the tower, the desiccant adsorbs the water
vapour and the compressed air is dried.
Once the top of the tower is reached, the air leaves the dryer via the outlet valve (= top selector
valve).
A small portion of the dried air passes a nozzle, expands to atmospheric pressure and flows
downwards through the other tower, regenerating (drying) the desiccant. A nozzle for operation of
the dryer at 7 bar is installed as standard. Alternative nozzles for use at other operating
pressures are available as sales kit, see section Technical data. The regeneration air is released
via the corresponding solenoid valve and the silencer. The solenoid valves are controlled by the
timer.

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After a pre-set period, the function of the towers is reversed. The fully regenerated tower will now
dry the air, while the desiccant in the other tower will be regenerated.
By default, the regeneration timer will restart from the beginning of the cycle in case of a power
failure during operation or in case the on/off switch was put in position 0.
However, in case the input of remote control connector X3 (old denomination: P4 - freeze
contact, see section Electric diagram) opens (by the freeze contact), the dryer will "freeze" the
drying cycle: purge air flow stops, both solenoid valves are closed. When the contact, connected
to connector X3 closes, the dryer will switch towers and will continue normal operation. This
feature can prevent loss of compressed air (purge air) when the compressor is not continuously
running loaded. On compressors with load/unload regulation, X3 can be connected to a voltage
free contact of the compressor (contact open when the compressor runs unloaded). If no free
contact is available, an additional voltage free contact should be installed on the load/unload
contactor of the compressor to use this feature. See section Electrical connections for more
details.

Do not connect X3 when an air receiver is installed before the dryer.

X3 should only be connected when the air receiver is installed downstream of the dryer.

Flow diagrams
Depending on the dryer size, the dryer can be composed of a single dryer module (flow diagram:
see above), or of two or three dryer modules in parallel (see below):

Flow diagram CD 60+ up to CD 100+

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Flow diagram CD 145+

Reference Designation Reference Designation

1 Air inlet 7 Outlet selector valve
2 Connecting tube 8 Air outlet
3 Inlet selector valve 9 Left solenoid valve
4 Left desiccant tower 10 Right solenoid valve
5 Right desiccant tower 11 Left silencer
6 Purge nozzle 12 Right silencer
PI Pressure gauge

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Control panel

Control panel with flow diagram

S1 On/Off switch 9 LED <Service warning>

1 LED <Power On> 10 LED <Service alarm>
2 LED <In Operation> 11 Timer countdown (Indication of PDP in option)
3 LED < Left tower drying> 12 Air Inlet
4 LED <Left tower regenerating> 13 Air Outlet
5 LED <Right tower drying> 14 Outlet selector valve
6 LED <Right tower regenerating> 15 Inlet selector valve
7 LED <PDP warning> see note 16 Solenoid valves
8 LED <PDP alarm> see note

Note: The LED indication of the dew point (PDP) (LED’s 7 and 8) is only operational when the
dryer is equipped with an electronic dew point indicator (available as option).

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3 Electrical diagram

Service diagram (typical)

Reference Explanation
(1) Customer's installation
(a) Maximum fuses with regard to circuit protection. Cable section may impose fuses of smaller
value
(b) Supply settings for X9

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Reference Explanation
(c) Connection for remote control (X3): to NO contact of compressor
(d) Supply connection for 115 V and 230 V
(f) Time setting solenoid valves
(g) Connection PDP sensor

Reference Designation Reference Designation

E1 Controller card E2 LED/Display card
PDP Pressure Dew Point sensor X9 Supply connections
(optional)
K01 Alarm relay K02 Warning relay
K03 Solenoid relay, left tower K04 Solenoid relay, right tower
Y1-(Y3)-(Y5) Solenoid valve(s) left tower Y2-(Y4)-(Y6) Solenoid valve(s) right tower
X1 Input PDP X2 Input On/Off contact
X3 Input Freeze contact S1 On/Off switch
X4 Input Ext 1 contact X5 Input Ext 2 contact
X8 CAN-Bus X11 Output alarm relay
X12 Output warning relay
X13 Output solenoid (left tower) X15 Output solenoid (right tower)

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4 Installation

4.1 Dimension drawings

CD 80+ and CD 100+

4.2 Installation proposal

Piping

Make sure that all pipes, filters, valves, etc. are clean and that they are installed correctly
with or without bypass system.
Make sure that the piping is installed stress-free. For more information concerning air nets,
cooling systems etc., refer to the compressor installation manual.

To ensure correct operation of the dryer, it has to be fitted properly into the compressed air
circuit. Depending from the fact if the remote control connector X3 is used or not (see section
Operation), there are two possibilities:

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X3 is not used

If the X3 connection is not used, the correct installation sequence is compressor - air
receiver - dryer.

Installation without use of the X3 connection with the compressor

COMP Compressor
AR Air receiver
D Dryer
EIV External inlet valve
To cut off the air supply towards the dryer
EOV External Outlet Valve
To cut off the air supply towards the air consumer
BV Bypass valves (not shown on the drawings)
Together with the external inlet valve and the external outlet valve, the bypass valves
allow the dryer and the filters to be serviced while non-dried air flows through the
bypass system.
WSD Water separator (optional)
To prevent free water from entering the dryer.
DD Compressed air prefilter DD: general purpose filtration, particle removal down to 1
micron, maximum oil carry-over 0.5 ppm
This filter is not included in the scope of supply, but recommended to provide extra
protection of the CD dryer and extend the lifetime of the PD filter cartridge.

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PD PD filter: high efficiency filter, particle removal down to 0.01 micron, maximum oil carry-
over 0.01 ppm
To remove remaining impurities.
DDp DDp filter: dust filter, particle removal down to 1 micron
To remove possible dust particles coming from the desiccant.
QD Filter with active carbon, capable of absorbing odour (not shown on the drawings). To
be installed downstream of the DDp filter if desired.

X3 is used

If the X3 connection is used, the correct installation sequence is compressor - dryer - air
receiver.

Installation in case the X3 connection with the compressor is used

General recommendations
Important: Keep the following in mind when installing the dryer:
• Place the dryer at a location where the temperature never exceeds the limits, see section
Limitations for operation.
• The dryer does not require extra ventilation.
• Fix the dryer as level as possible to the wall or to the floor. For certain models, a wall
mounting kit is available as option - see spare parts book for part numbers. Make sure the

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fixating screws are tightened firmly and that the wall or the floor is suitable for taking the
weight of the dryer.
• Provide enough space around the dryer to install and service the filter elements. A minimum
free space of 800 to 1000 mm is recommended.
If the filters are mounted directly onto the dryer, the dryer should eventually be positioned
higher to enable servicing of the filter elements.
• Use a DD filter and a PD filter at the inlet of the dryer. Use a DDp filter at the outlet of the
dryer. Should oil vapour and odours are undesirable, a QD carbon filter can be installed
downstream the DDp filter.
• If the compressor has no built-in water separator or if the dryer is not located near the
compressor, a water separator (WSD) has to be installed before the dryer in order to prevent
free water from entering the dryer, as free water can damage the desiccant. If the
condensate contains oil, install an oil/water separator for draining of pure condensate water
(consult your supplier).
• The drain hoses of the water separator and the filters must not dip into the sewer.
• It is recommended to install bypass pipes with ball valves over the filters in order to isolate
the filters during service operations without disturbing the compressed air delivery.
• It is required to install pressure relief valves on the dryer when ball valves are installed at the
inlet and the outlet of the dryer to isolate the dryer from the air net.
• If dryers are used in parallel make sure that all dryers can be bypassed through one of the
other dryers, as shown in below figure:

Parallel installation of CD dryers

Never overload the dryer as this will damage the desiccant. It may be recommended to
install the air dryer upstream of the air receiver to prevent overload (e.g. after extending the
dry air circuit). Consult Atlas Copco if in doubt.

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5 Electrical connections

General

The electrical wiring must comply with the local regulations. The air dryer must be
earthed and protected by fuses against short-circuiting. Consult the electric
diagram delivered with the dryer.
Before switching on the main power supply, check the voltage requirements in the
technical specifications or on the dryer’s data plate.

Timer card layout

Below figure shows the terminals of the timer card:

Timer card

• Supply connection (X9)

In most cases, the dryer only needs to be connected to the power supply. If not already
done, the power cable must be connected to terminals X9 as shown below.
Timer card 1900 0713 03 (cubicle 1900 5002 00 and 1900 5002 02) is suitable for supply
voltages 115 V and 230 V.
• For 115 V AC: connect the supply cable to terminals 2 (line) and 5 (neutral) and place a
jumper wire between terminals 2-3 and 4-5:

• X3 (freeze contact - P4)

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If you want to use the feature to “freeze” the regeneration cycle when the compressor runs
unloaded, connect pin 1 and 2 of connector X3 with the potential free contact of the
compressor (contact closed = freeze).
• CAN-Bus connection
The timer card can be interconnected in a LAN with other Elektronikon® controllers.
Addressing and CAN protocol used are the same as for the Elektronikon regulators.
Because the timer card has no programming features however, the exchanged information
is pre-configured and cannot be redefined.
Application: data communication between timer cards, MkIV Elektronikon regulators and
service PC.

Pin Function Pin Function Pin Function

1 reserved 4 reserved 7 CAN_HIGH
2 CAN_LOW 5 reserved 8 reserved
3 CAN_GND 6 CAN_GND 9 reserved

• Output alarm relay X11

These terminals are connected to a relay that switches at the same time as the alarm LED.
Pin designations:

Pin Label Description

1 NO2 Alarm contact - Normally Open
2 COM2 Alarm contact - Common
3 NC2 Alarm contact - Normally Closed

• Output warning relay - X12

These terminals are connected to a relay that switches at the same time as the warning
LED.
Pin designations:

Pin Label Description

1 NO1 Warning contact - Normally Open
2 COM1 Warning contact - Common
3 NC1 Warning contact - Normally Closed

• Configuration dip switch settings

The dip switch settings are factory set and should not be altered unless the timer card is
replaced or an option is fitted.

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Dip switch number Function

1,2 cycle time selection
Sw 1,2=Off, Off: T1=95 s, T2=25 s
3 Off=PDP sensor not configured / disabled
On=PDP sensor enabled (optional)
4 Off=PDP -40˚C version enabled
On=PDP -70˚C version enabled
Do not change the settings without change of desiccant!
5 Off=PDP temperature indication in ˚C
On=PDP temperature indication in ˚F
6,7 Control mode selection
Sw 6,7=Off,Off: local control enabled
Sw 6,7=On,Off: external input control enabled
Sw 6,7=Off,On: LAN control enabled
Sw 6,7=On,On: not valid
8 not used

• CAN Bus address dip switch

Dip switch number Function

1,2,3 (reserved) Normally Off
used for diagnostic purposes
4,5,6,7,8 Binary address selector (valid values= 1 to 31)
bit 4, bit 3, bit 2, bit 1, bit 0)
On = 1, Off = 0

Example of address selection:

For CAN Bus node address 1, the dip switch configuration is:

Before switching on the main power supply, check the voltage requirements in the technical
specifications or on the dryer’s data plate.

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6 Operating instructions

Safety

Always observe all relevant safety instructions.

Initial start-up
To start up the dryer for the first time or after a long period of standstill, proceed as follows:
1. If installed, open the bypass valves of the dryer.
2. Close off the air supply from the compressor towards the dryer by closing the external inlet
valve (if installed).
3. If installed, close the outlet valve.
4. Remove the silencers to prevent the silencers from getting clogged by the desiccant and
wear a dust mask, safety glasses and ear protection. (This is only required at initial start-up
or after the desiccant was replaced).
5. Start the compressor and wait for pressure.
6. Slowly open the inlet valve.
7. Check the connections of the dryer for air leaks and remedy if necessary.
8. Switch the dryer on by putting main switch S1 in position I.
9. Let the dryer operate for several hours with the external outlet valve closed.
10. In case the silencers were removed, refit the silencers.
11. Gradually open the external outlet valve.
12. If applicable, close the bypass valves of the dryer.

If the application allows air that is not completely dry, the valve towards the dry air
consumer may be opened even before the optimal Pressure Dew Point (PDP) is
reached. In this case however, it will take more time for the desiccant to dry the air
completely.
At initial start-up, and specially when the dryer is loaded from the beginning, it can take
a long time before the dew point is reached.
It is therefore recommended to operate the dryer for a number of days with the outlet
valve closed.

Normal start
If the dryer has not been used for more than 3 months, refer to section Initial startup. In all other
cases, proceed as follows:
1. Cut off the air supply from the compressor towards the dryer by closing the external inlet
valve.
2. If installed, close the external outlet valve between the dryer and the dry air consumer.
3. Start the compressor and slowly open the external inlet valve.
4. Switch the dryer on by putting main switch S1 in position I.
5. Gradually open the air outlet valve.
6. If applicable, close the bypass valves of the dryer.

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Close the external inlet valve in case the compressor needs to be restarted. The high
air speed in the startup phase of the compressor may damage the desiccant.

During operation
At regular intervals, check the status of the LED’s on the control panel. If the warning/alarm LED
is lit, consult the section Trouble shooting.
If the dryer is equipped with a PDP temperature display, check the PDP temperature regularly. If
the PDP temperature is too high, let the dryer regenerate by closing the outlet valve.

Stopping
To stop the dryer, proceed as follows:
1. If installed and if necessary, open the bypass valves of the dryer so that the application will
still receive compressed air.
2. Close the external inlet valve between the compressor and the dryer and the external outlet
valve between the dryer and the dry air consumer.
3. Let the dryer operate for a period without consumption, to depressurize the vessels.
4. Switch off the dryer by putting main switch S1 to position 0.

If the dryer is stopped for a longer period, keep the external inlet and outlet valve
closed to avoid moisture from entering the dryer.
Under no circumstances must compressed air be allowed to flow through the dryer
when the electrical power is switched off. This will result in terminal failure of the
desiccant material, causing regeneration will no longer be possible.

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7 Maintenance

7.1 Maintenance

General recommendations and precautions

The dryer does not need any specific maintenance. Nevertheless, before carrying out any
maintenance or corrective activity, read the following recommendations and safety precautions
and act accordingly:
• Switch off the dryer by putting main switch S1 to position 0.
• Disconnect all pressure sources and vent the internal pressure of the system before
dismantling any pressurized component.
• Use genuine Atlas Copco spare parts only. Consult the Spare Parts List for part numbers.
For preventive maintenance, dedicated Service kits are available.
• Check for correct operation after maintenance.

Filters and valves installed between the compressor, the dryer and the air consumer
may need other maintenance activities than those mentioned below (e.g. draining the
filters and replacing the filter elements). Refer to the appropriate manual for more
information.

Preventive maintenance schedule

Frequency Service plan Activity

Daily Check the display panel. Information on the pressure dew point (PDP)
and service messages can be found here.
Every 6 months or A • Check for damaged wiring or loose connections.
every 4000 hours • Check for air leaks.
of operation (1) • Replace the in- and outlet filter cartridges.
• Replace the silencers.
Every year or B • Service plan A
every 8000 hours
of operation (1)
Every five years or C • Service plan B
every 40000 hours • Replace desiccant
(1) • Replace shuttle valves
Always replace all o-rings, seals and nylon washers that come free
when executing the scheduled maintenance.

(1) whichever comes first

In normal working conditions, the lifetime of the desiccant is approximately 5 years.
It is recommended to have the desiccant replaced by a qualified Atlas Copco service technician.
After each 8000 hours service interval, the timer card needs to be reset with a magnetic key, see
section Resetting the service counter or the instruction, delivered with the service kits.
All spare parts required for scheduled maintenance are included in specific service kits. Consult
the spare parts list for part number information.

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7.2 Resetting the service timer

Timer card resetting procedure

To reset the timer card, continue as follows:

• Close off the dryer as described in the stopping procedure, see section Operating
instructions.
• Switch off the dryer by putting switch S1 to ‘Off’ position. LED (2) (dryer operating) will
extinguish. Perform the service plan as scheduled.
• If the service warning LED (9) is already alight, go directly to the next step.
If maintenance is being carried out before the service alarm appears (every 8000 hours), the
reset procedure needs to be activated before the service counter can be reset to 0. This can
be done by placing the service magnet during 3 seconds over the indicated area (A) of the
control panel, in the middle of the left tower. As an indication that the reset procedure is
activated, the service warning LED (9) will light up.
• Reset the timer card by putting the service magnet over the indicated area (A) of the control
panel during 5 s. The service alarm LED extinguishes. The service counter has now been
reset to 0.
Also the counter to switch towers will be reset to 0 (only visible in case of timer control).
• Restart the dryer by switching switch S1 to ‘On’. The service counter will restart, the dryer
operating LED (2) is alight, and the drying and regeneration LED’s indicate the status of the
dryer operating cycle.
The timer card is now reset and normal operation continues. The service counter has been reset
to 0 and will appear again after 8000 hours.

7.3 Disposal of used material

Used filters or any other used material (e.g. desiccant, lubricants, cleaning rags, machine parts,
etc.) must be disposed of in an environmentally friendly and safe manner, and in line with the
local recommendations and environmental legislation.

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Electronic components are subject to the EU Directive 2012/19/EC for Waste Electrical and
Electronic Equipment (WEEE). As such, these parts must not be disposed of at a municipal
waste collection point. Refer to local regulations for directions on how to dispose of this product in
an environmental friendly manner.

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8 Problem solving

Overview

Symptom Possible cause Corrective action

LED PDP warning/PDP The dryer has not had the time to Close the valve installed between the
alarm is alight. regenerate completely. dryer and the application (if permitted)
PDP temperature too high and have the desiccant regenerated.
The silencers are clogged. Replace the silencers.
The drain is not working correctly. Check the drain valve of the filter.
The air flow through the dryer is too Check for correct application.
high.
The outlet pressure is too low. Check whether the compressor provides
enough air for the application.
The inlet temperature is too high. Check the compressor aftercooler.
Free water in the dryer. Check the water separator (WSD) and
the drain valve of the filters upstream of
the dryer.
The dryer produces a lot Check the silencer and its fixation to Replace the silencer if necessary or
of noise. the unit. correct its fixation.
Insufficient air leaves the Too much purge air escapes. Check the condition of the solenoid valve
dryer. and replace it if necessary.
Check if the correct nozzle is installed
(standard nozzle supplied is for 7 bar,
alternative nozzles are supplied as loose
parts).
Both silencers are The shuttle valve is stuck. Dismantle the bottom, remove the nipple
blowing off. and detach the shuttle.
LED Service warning / Both LED’s are timer-controlled and Contact Atlas Copco for maintenance.
Service alarm is alight. will light up after a certain time Reset the timer after maintenance.
(orange LED (warning) after 7750
hours, red LED (alarm) after 8000
hours).

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9 Technical data

9.1 Reference conditions

Condition Unit Value
Compressed air effective inlet pressure barg 7
Compressed air ˚C 3
inlet temperature 5
Relative humidity of the air at inlet % 1
0
0

9.2 Limitations for operation

Limitation Unit Value
Maximum compressed air effective inlet pressure barg
Minimum compressed air effective inlet pressure barg 4
Maximum ambient air temperature ˚C 45
Minimum ambient air temperature ˚C 1
Maximum compressed air inlet temperature ˚C 50
Minimum compressed air inlet temperature ˚C 1

9.3 Technical specifications

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10 Instructions for Use

Instructions

Description
1 The dryers can contain pressurized air. This can be potentially dangerous if the
equipment is misused.
2 The towers of the dryer consist of an extruded profile, which must only be used as a
compressed air vessel and must be operated within the limits specified. See section
Pressure Equipment Directives, table A.
3 No alterations must be made to the vessels by welding, drilling or other mechanical
methods without the written permission of the manufacturer.
4 The design pressure and temperature of this pressure bearing part must be clearly
indicated on the data label.
5 If installed, the safety valve must correspond with pressure surges of 1.1 times the
maximum allowable operating pressure. This should guarantee that the pressure will not
permanently exceed the maximum allowable operating pressure of the vessel.
6 Original bolts have to be used after opening for inspection. The maximum torque has to
be taken into consideration (see table below).

Maximum bolt torque

Thread size Tightening torque Allowed deviation

(Nm) (Nm)
M3 1 0.3
M4 2.4 0.6
M5 5 1.2
M6 8 2.1
M8 20 5
M10 41 10
M12 73 18
M14 115 29
M16 185 46
M18 238 60
M20 335 84

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11 Guidelines for inspection

Guidelines
On the Declaration of Conformity / Declaration by the Manufacturer, the harmonized and/or other
standards that have been used for the design are shown and/or referred to.
The Declaration of Conformity / Declaration by the Manufacturer is part of the documentation that
is supplied with this air dryer.
Local legal requirements and/or use outside the limits and/or conditions as specified by Atlas
Copco may require other inspection periods as mentioned below.

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12 Pressure Equipment Directives

Components Subject to 97/23/EC (up to 19/07/2016) or 2014/68/EU (from 20/07/2016 onwards)

Pressure Equipment Directive
The category according to 97/23/EC, respectively 2014/68/EU of the pressure assembly, as well
as the volume, is indicated in Table A (see below).
Parts of article 3.3 of 97/23/EC, respectively 2014/68/EU are subject to Sound Engineering
Practice (SEP).
Parts of category I according to 97/23/EC, respectively 2014/68/EU are integrated into the
machine and fall under the exclusion of article I, section 3.6.
The following table contains the necessary information for the inspection of all pressure
equipment according to the Pressure Equipment Directive 97/23/EC, respectively 2014/68/EU.
Design criteria for pressure equipment:
Table A

Dryer Tube drawing Design Design PED Tube wall Tube Tube
type p.n. pressure tem- category thickness diameter internal
bar(e) perature mm mm volume
°C l
CD 25+, -10 to +80 I 6 150 15.7
CD 30+,
CD 60+
CD 35+, 1624 0940 00 16 -10 to +80 I 6 150 20.0
CD 70+
CD 50+, 1624 0974 00 16 -10 to +80 I 6 150 26.5
CD 80+,
CD 100+,
CD 145+

Recommendation of the manufacturer for the re-inspection time

Following actions are to be executed by authorised service personnel, unless stated differently in
the applicable legislation. The stated time interval has as reference the day of start-up of the unit.
• Every 6 months: visual check of tube (tower) material on the outside (exposed) for traces of
strong corrosion. Consult the service department of your supplier if necessary.
• Every 5 years: when replacing the desiccant, following inspections are to be carried out:
• Inspection of outside and inside of the material for excessive and local corrosion,
• Inspection of outside and inside of the material for fissures, leaks, damage.
Consult the service department of your supplier if necessary.
• Every 10 years: hydrostatic test according to the Pressure Equipment Directive 97/23/EC,
respectively 2014/68/EU. Consult the service department of your supplier if necessary.

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13 Declaration of conformity

Typical example of a Declaration of Conformity document

(1): Contact address:

Atlas Copco Airpower n.v.
P.O. Box 100
B-2610 Wilrijk (Antwerp)
Belgium
(2): Applicable directives
(3): Standards used
On the Declaration of Conformity / Declaration by the Manufacturer, the harmonized and/or other
standards that have been used for the design are shown and/or referred to.
The Declaration of Conformity / Declaration by the Manufacturer is part of the documentation that
is supplied with this device.

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 Atlas Copco Airpower NV. All rights reserved. Designs and specifications are subject to change without notice or obligation.
COMMITED TO SUSTAINABLE PRODUCTIVITY
We stand by our responsibilities towards our customers, towards the
environment and the people around us. We make performance stand
the test of time. This is what we call — Sustainable Productivity.

www.atlascopco.com