Festo PDAD Series User manual

(en) Operating
instructions
8068814
1701g
[8068816]
Adsorption dryer
PDAD

2 | Festo PDAD 1701g
Original instructions
Installation and commissioning are to be
carried out only by qualified personnel in
accordance with the operating instructions.

Festo PDAD 1701g English | 3
Table of contents
1. Introduction .................................................................................................................. 4
2. Safety............................................................................................................................ 5
3. Component designation................................................................................................ 7
3.1 Overview....................................................................................................................... 7
3.2 Electronic controller 2................................................................................................ 9
3.3 Multiple distributor aJ ................................................................................................ 9
3.4 Desiccant cartridge with integrated dust filter 9........................................................ 9
3.5 Reservoir 7................................................................................................................. 9
4. Function ...................................................................................................................... 10
5. Installation.................................................................................................................. 11
5.1 Mounting the micro filter on the dryer ........................................................................ 11
5.2 Pneumatic connection................................................................................................. 13
5.3 Assembling the mounting accessories on the dryer.................................................... 14
5.4 Changing the connections for the inlet and outlet ...................................................... 15
5.5 Installation conditions ................................................................................................ 16
6. Power supply .............................................................................................................. 17
6.1 Voltage connection ..................................................................................................... 17
6.2 Power supply socket connection................................................................................. 18
6.3 Alarm connection ........................................................................................................ 19
7. Commissioning ........................................................................................................... 20
8. Maintenance and care................................................................................................. 22
8.1 LED displays................................................................................................................ 22
8.2 Decommissioning for maintenance purposes ............................................................. 24
8.3 Maintenance and service ............................................................................................ 24
8.4 Removing/installing the front or rear cover ................................................................ 25
8.5 Replacing or cleaning the air nozzle............................................................................ 26
8.6 Cleaning the silencer................................................................................................... 27
8.7 Resetting the controller .............................................................................................. 28
9. Troubleshooting.......................................................................................................... 29
9.1 General fault finding ................................................................................................... 29
9.2 Electrical troubleshooting ........................................................................................... 30
10. Accessories................................................................................................................. 31
11. Technical data............................................................................................................. 32

4 | Festo PDAD 1701g English
1. Introduction
For all available product documentation www.festo.com/pk
The product described in these operating instructions may only be installed, operated and
maintained if these operating instructions have been completely read and understood by
the employees handling the product.
These operating instructions and in particular the safety instructions are to be kept with
the product or as a print-out or copy. The operating instructions must be strictly adhered
to.
Please keep the following information available if you need to contact Festo with regard to
the product or the operating instructions.
• Part number and type designation
• Date commissioned
The part number and type designation can be found on the rating plate on the top right-
hand side of the device. Please note this information in the operating instructions as a
reminder and for future use.
The dryer is delivered in protective packaging. Use due diligence when transporting,
loading and unloading the device.
On delivery, the dryer is configured with an air nozzle for an operating pressure of 7 to 9
bar. You must ensure that the correct air nozzle is attached for the anticipated operating
pressure. For more information see the table with technical data in chapter 11.
Scope of delivery
Adsorption dryer PDAD
Micro filter
MS6-LFM
Adapter kit Power supply
socket
Tubing Operating
instructions PDAD

Festo PDAD 1701g English | 5
2. Safety
Festo expressly excludes any liability or responsibility for damages and/or injuries which
result from violation of these operating instructions.
The device may only be used for its intended purpose. The cold regenerative adsorption
dryer is only to be used according to its intended purpose for drying pressurised air under
the conditions described in chapter 11 of these operating instructions. Any other use of
the device is considered not for its intended purpose. Festo is not liable for damages which
result from misuse.
The following symbols indicate a possible hazard. Where such hazards arise, the
appropriate measures must be taken in order to reduce the risk for the user or operator of
the product.
Caution:
Source of danger
Attention:
Danger due to
electrical voltage
Attention:
Danger due to high
pressures
Note on Pressure Equipment Directive
Classification of the dryers in pressure equipment categories
Category
Type
I
PDAD-09
I
PDAD-13
I
PDAD-22
I
PDAD-51
II
PDAD-73
II
PDAD-100
Notes on commissioning and maintenance
Vibrations can cause fatigue in the material and can decrease the endurance limit of the
adsorption dryers and mounting components.
• Protect adsorption dryers and mounting components against mechanical vibrations.
Commissioning and the intervals for periodic inspections are subject to the applicable
national regulations.
When carrying out maintenance work, inspect components visually for damage. Replace
the device if necessary.

6 | Festo PDAD 1701g English
The following safety regulations need to be strictly adhered to:
• These operating instructions or a print-out or copy thereof are to be left at the place
where the product is installed.
• Repair work on the device is only to be carried out by personnel authorised by Festo.
• Operating, repair and maintenance personnel must be aware of the following
information:
– Accident prevention regulations
– Safety information (general and device specific)
– Device safety equipment
– Measures to be taken in an emergency
• It is the installer's responsibility to ensure that the cables to and from the dryer are
suitable for the task, correspond to the applicable laws and have been subjected to a
visual check and tests before commissioning. All cables must be fitted in an appropriate
manner.
• The device must be decommissioned before carrying out any maintenance or repair
work. Operators and other personnel are exposed to a risk if work is carried out on a
running device. Decommissioning the device means disconnecting it from the power
supply and compressed air supply, and ensuring the pressure is completely reduced.
• Only trained specialists who are aware of the electrical requirements of the device
as described in these operating instructions as well as the safety regulations and
conditions are permitted to carry out work on the electrical components and the power
supply of the device.
• Use suitable, correctly sized tools that are in good condition to carry out any work on
the device.
• Only use accessories and spare parts from the manufacturer. There is no guarantee that
non-original spare parts are designed and manufactured to correspond to the safety
and operating requirements of the device. Festo takes no liability for device faults which
result from the use of unapproved spare parts.
• Use suitable and safe work platforms or other secure work access options to carry out
installation work above head height.
• Do not make any design changes to the product. Changes and modifications may only
be carried out by Festo.
• All faults or defects which could impair safety must be eliminated before using the
device.
• Used objects and materials must be correctly disposed of in line with the local laws and
conditions. This applies in particular to the desiccant cartridges.

Festo PDAD 1701g English | 7
3. Component designation
On the back of
the dryer
ad
1Upper valve block
2Electronic controller
3Lower valve block
4Floor plate
5Front cover
6Mounting screw front cover
7Reservoir
8Mounting screw reservoir
9Desiccant cartridge with integrated
dust filter
aJ Multiple distributor
aA Cover plate
aB Cover plate mounting screw
aC Rear cover
aD Power supply socket
aE Reservoir seal screw
aF Seal
aG Silencer
aH Air nozzle
aB aHaJ aA
1
aC
8
7
9
3
aG
5
6
2
aF
4
aE
3.1 Overview
The figure below shows the main components of the dryer
PDAD-09/13/22/51/73.

8 | Festo PDAD 1701g English
On the
inside of the
dryer
ad
1Upper valve block
2Electronic controller
3Lower valve block
4Floor plate
5Front cover
6Mounting screw front cover
7Reservoir
8Mounting screw reservoir
9Desiccant cartridge with integrated
dust filter
aJ Multiple distributor
aA Cover plate
aB Cover plate mounting screw
aC Rear cover with cable throughfeed for
mains connection
aD Power supply socket
aE Reservoir seal screw
aF Seal
aG Silencer
aH Air nozzle
aI Multiple distributor connection
screws
bJ Seal for connecting multiple
distributor
The figure below shows the main components of the dryer
PDAD-100.
aB aH
aJ
aA
aI
1
aC
8
7
9
3
5
6
4
2
aG
aF
aE bJ

Festo PDAD 1701g English | 9
3.2 Electronic controller 2
The valve blocks (on top and below) are actuated by solenoid valves in the controller which
determine the pressure and direction of the air flow in the desiccant cartridge.
3.3 Multiple distributor aJ
The standard design of the dryer is configured in such a way that the inlet openings are
on the left and the outlet openings on the right when looking at the front of the device. By
using the opening nozzles several different opening requirements become available. See
also section 5.4.
Inlet
See the direction of the arrows
for inlet side of the dryer
Outlet
Installation in corners
3.4 Desiccant cartridge with integrated dust filter 9
The desiccant cartridges contain a drying agent which has been developed for drying
compressed air. The drying agent is contained in a transparent tube with end pieces which
allow the air to flow through at both ends. In the upper part of each cartridge is a 1 micron
filter to separate residual dust from the drying agent. The cartridge length varies with the
rated output of the dryer.
3.5 Reservoir 7
The desiccant cartridge is located in an extruded aluminium reservoir and has pressurised
end caps. The operating pressure and the flow through the individual cartridges is
controlled by the valve blocks positioned between the two reservoirs. The regenerative
air flow (purge air flow) is controlled by an external air nozzle with a small opening (front,
central) on the upper valve block, accessible by removing the cover.

10 | Festo PDAD 1701g English
4. Function
During dry operation an even, uninterrupted supply of compressed air should be provided
according to the specification.
This function is achieved with two compressed air reservoirs which operate in alternating
cycles. If air is being dried in one reservoir, the drying agent in the second reservoir can
regenerate.
In the adsorption dryer the main air flow is fed through the desiccant cartridge(s) of a
reservoir. This removes the moisture so the required pressure dew point can be achieved.
A small amount of the dry air (purge air) is fed to the other reservoir. The purge air flows
through the desiccant cartridge(s), escapes into the atmosphere through a drain valve and
thus regenerates the drying agent.
The regeneration cycle lasts 120 seconds. The corresponding drain valve is then closed.
This means the regenerated reservoir can be brought up to system pressure with the purge
air and can switch to the operating cycle. After a further 50 seconds the other reservoir
starts a new regenerative operating cycle.