Condair DA Series User manual

2596470-C EN 2108
Dehumidication and Drying
READ AND SAVE THESE INSTRUCTIONS
INSTALLATION AND
OPERATION MANUAL
Desiccant dryer
Condair DA 210 - 450

Thank you for choosing Condair
Installation date (MM/DD/YYYY):
Commissioning date (MM/DD/YYYY):
Site:
Model:
Serial number:
Proprietary Notice
This document and the information disclosed herein are proprietary data of Condair Group AG. Neither this document,
nor the information contained herein shall be reproduced, used, or disclosed to others without the written authori-
zation of Condair Group AG, except to the extent required for installation or maintenance of recipient's equipment.
Liability Notice
Condair Group AG does not accept any liability due to incorrect installation or operation of the equipment or due
to the use of parts/components/equipment that are not authorized by Condair Group AG.
Copyright Notice
© Condair Group AG, All rights reserved.
Technical modications reserved

3Contents
Contents
1 Introduction 5
1.1 To the very beginning 5
1.2 Notes on the installation and operation manual 5
2 For your safety 7
3 Important notes 10
3.1 Inspection of the delivery 10
3.2 Storing/Transportation/Packaging 10
4 Product overview 11
4.1 Product designation 11
4.2 Applications 11
4.3 Method of operation 12
4.4 Product description 13
4.4.1 Casing 13
4.4.2 Rotor 13
4.4.3 Filters 13
4.4.4 Fans for process- and reactivation air 13
4.4.5 Heater for reactivation air 14
4.4.6 Electrical panel 14
4.4.7 Operation Options 14
5 Installation 15
5.1 Installation and service access 15
5.2 Duct connection for permanent installation 15
5.2.1 Wet air duct from the desiccant dryer 15
5.2.2 Reactivation air into the desiccant dryer 15
5.2.3 Process- and dry air with the desiccant dryer installed in the dehumidied room 15
5.2.4 Process- and dry air with the desiccant dryer installed outside the dehumidied room 16
5.2.5 Duct connection for basement installation 16
5.2.6 Temporary installation 16
5.2.7 Installation schematics 17
5.3 Electrical installation 17
6 Commissioning 18
7 Maintenance 19
7.1 Important notes on maintenance 19
7.2 Filters 20
7.3 Rotor 20
7.4 Electrical motors 20
7.5 Heater 21
7.6 Rotor drive belt 21
7.7 General summary of maintenance intervals 21

4Contents
8 Troubleshooting 22
9 Productspecication 23
9.1 Technical data 23
9.2 Dimensions Condair DA 210 24
9.3 Dimensions Condair DA 400 - 450 24
9.4 Airow diagrams Condair DA 210 25
9.5 Airow diagrams Condair DA 400 26
9.6 Airow diagrams Condair DA 450 27
10 Spare parts 28
10.1 Spare parts Condair DA 210 28
10.2 Spare parts Condair DA 400 28
10.3 Spare parts Condair DA 450 29
11 Electrical wiring diagrams 30
11.1 Electrical wiring diagram Condair DA 210 30
11.2 Electrical wiring diagram Condair DA 400 32
11.3 Electrical wiring diagram Condair DA 450 34
12 EU declaration of conformity 36

5Introduction
1 Introduction
1.1 To the very beginning
We thank you for having purchased a Condair DA 210 - 450 desiccant dryer (for short: Condair DA).
The Condair DA desiccant dryers incorporate the latest technical advances and meets all recognized
safety standards. Nevertheless, improper use of the Condair DA desiccant dryer may result in danger
to the user or third parties and/or damage to property.
To ensure a safe, proper, and economical operation of the Condair DA desiccant dryer, please observe
and comply with all information and safety instructions contained in the present documentation as well
as in the separate documentations of the components installed in the drying system.
If you have questions after reading this documentation, please contact your Condair representative.
They will be glad to assist you.
1.2 Notes on the installation and operation manual
Limitation
The subject of this installation and operation manual are the Condair DA 210 - 450 desiccant
dryers in their different versions. The various options and accessories are only described insofar as
this is necessary for proper operation of the equipment. Further information on options and accessories
can be obtained in the respective manuals.
This installation and operation manual is restricted to the installation, commissioning, operation,
maintenance and troubleshooting of the Condair DA desiccant dryer and is meant for well-trained
personnelbeingsufcientlyqualiedfortheirrespectivework.

6Introduction
Symbols used in this manual
NOTE!
The catchword "NOTE" used in conjunction with the hand symbol designates important notes in this
manual that require special attention.
CAUTION!
The catchword "CAUTION" used in conjunction with the caution symbol in the circle designates notes
in this operation manual that, if neglected, may cause damage and/or malfunction of the unit or
other material assets.
WARNING!
The catchword "WARNING" used in conjunction with the general caution symbol designates safety
and danger notes in this operation manual that, if neglected, may cause to injury to persons.
DANGER!
The catchword "DANGER" used in conjunction with the general caution symbol designates safety and
danger notes in this operation manual that, if neglected, may lead to severe injury or even death
of persons.
Safekeeping
Please safeguard this installation and operation manual in a safe place, where it can be immediately ac-
cessed. If the desiccant dryer changes hands, the documentation must be passed on to the new operator.
If the documentation gets misplaced, please contact your Condair representative.
Language versions
This installation and operation manual is available in other languages. Please contact your Condair
representative for information.

7For your safety
2 For your safety
General
Every person working with the Condair DA desiccant dryer must have read and understood this instal-
lation and operation manual before carrying out any work.
Knowing and understanding the contents of the installation and operation manual is a basic requirement
for protecting the personnel against any kind of danger, to prevent faulty operation, and to operate the
unit safely and correctly.
All ideograms, signs and markings applied to the Condair DA desiccant dryer must be observed and
kept in readable state.
Qualicationofpersonnel
All work described in this installation and operation manual may only be carried out by specialist who
arewelltrainedandadequatelyqualiedandareauthorizedbythecustomer.
For safety and warranty reasons any action beyond the scope of this manual must be carried out only
by qualied personnel authorised by the manufacturer.
It is assumed that all persons working with the Condair DA desiccant dryer are familiar and comply with
the appropriate regulations on work safety and the prevention of accidents.
The Condair DA desiccant dryer may not be used by persons (including children) with reduced physical,
sensory or mental abilities or persons with lacking experience and/or knowledge, unless they are super-
vised by a person responsible for their safety or they received instructions on how to operate the system.
Children must be supervised to make sure that they do not play with the Condair DA desiccant dryer.
Intended use
The Condair DA 210 - 450 desiccant dryers are intended exclusively for airdehumidicationatat-
mospheric pressure within the specied operating conditions (see chapter 9.1 – Technical data). Any
other type of application, without the written consent of Condair, is considered as not conforming with
the intended purpose and may lead to the Condair DA desiccant dryer becoming dangerous.
Operation of the equipment in the intended manner requires that all the information contained in this
installation and operation manual are observed (in particular the safety instructions).

8For your safety
Danger that may arise from the Condair DA desiccant dryer
DANGER!
Dangerofelectrichazard!
The Condair DA desiccant dryer is mains powered. Live parts may be exposed when the unit
is open. Touching live parts may cause severe injury or danger to life.
Prevention: Before carrying out any work set the Condair DA desiccant dryer out of operation (switch
off the unit, disconnect it from the mains) and secure the unit against inadvertent power-up.
WARNING!
Risk of injury!
Inside the Condair DA desiccant dryer there are moving parts present, which can cause seri-
ousinjurytohandsandngers.
Prevention: Before carrying out any work set the Condair DA desiccant dryer out of operation (switch
off the unit, disconnect it from the mains) and secure the unit against inadvertent power-up.
Keep hands away from moving parts.
WARNING!
Risk of burns!
Inside the Condair DA desiccant dryer are heating element present, which can cause burns if
touched.
Prevention: Before carrying out any work set the Condair DA desiccant dryer out of operation (switch
off the unit, disconnect it from the mains), secure the unit against inadvertent power-up, and wait at
least 15 minutes prior to opening any service panel, allowing the heater to cool down.
Warning signs attached to the unit
General Warning
Draws attention to a dangerous situation that can lead to injury or serious da-
mage to health.
Electric shock
Before carrying out any work set the Condair DA desiccant dryer out of operation
(switch off the unit, disconnect it from the mains) and secure the unit against
inadvertent power-up.
Hot surfaces
Hot surfaces inside the device. Before carrying out any work set the Condair DA
desiccant dryer out of operation (switch off the unit, disconnect it from the mains),
secure the unit against inadvertent power-up, and wait at least 15 minutes prior
to opening any service panel, allowing the heater to cool down.
Rotating fan blades
Before carrying out any work set the Condair DA desiccant dryer out of opera-
tion (switch off the unit, disconnect it from the mains), secure the unit against
inadvertent power-up.
Keep hands or other body parts away from moving parts.

9For your safety
Correct lifting and handling
Lifting or handling of components always carries an element of risk, and therefore must only be carried
out by trained and qualied personnel. Ensure that any lifting operations have been fully planned and risk
assessed. All equipment should be checked by a skilled and competent health & safety representative.
It is the customer’s responsibility to ensure that operators are trained in handling heavy goods and to
enforce the relevant lifting regulations.
Preventing unsafe operation
If it is suspected that safe operation is no longer possible, the Condair DA desiccant dryer should
immediately be shut down and secured against accidental power-up. This can be the case under
the following circumstances:
– if the Condair DA desiccant dryer is damaged
– if the electrical installations are damaged
– if the Condair DA desiccant dryer is no longer operating correctly
All persons working with the Condair DA desiccant dryer must report any alterations to the unit that may
affect safety to the owner without delay.
Prohibitedmodicationstotheunit
Nomodicationsmust be undertaken on the Condair DA 210 - 450 desiccant dryers without the
express written consent of Condair.
For the replacement of defective components use exclusively original accessories and spare parts
available from your Condair representative.
CAUTION!
The desiccant dryer must only be used for dehumidication of air at atmospheric pressure.
Never use the desiccant dryer without the lters as the desiccant rotor can become contaminated and
lose capacity.
The desiccant dryer must not be installed in areas where explosion proof equipment is required.
–

10 Important notes
3 Important notes
3.1 Inspection of the delivery
After receiving:
– Inspect shipping boxes for damage. Any damages of the shipping boxes must be reported to the
shipping company.
– Check packing slip to ensure all parts has been delivered. All material shortages are to be reported
to your Condair supplier within 48 hours after receipt of the goods. Condair assumes no responsibility
for any material shortages beyond this period
– Unpack the parts/components and check for any damage. If parts/components are damaged, notify
the shipping company immediately
– Check whether the components are suitable for installation on your site according to the model key
stated on the type plate
3.2 Storing/Transportation/Packaging
Storing
The Condair DA desiccant dryer must be stored in a weather-protected environment.
– Room temperature: -30°C to +40°C
– Room humidity: 0-90%RH (non condensing)
Transportation
Observe the following for transport or handling of the Condair DA desiccant dryer:
– The desiccant dryer should always stand upright on its feet.
– Never put other goods on top of the desiccant dryer.
For optimum protection always transport the unit in the original packaging and use an appropriate lifting/
transporting device.
WARNING!
It is the customer’s responsibility to ensure that operators are trained in handling heavy goods and that
the operators comply with the appropriate regulations on work safety and the prevention of accidents.
Packaging
Keep the original packaging of the components for later use. In case you wish to dispose of the packag-
ing, observe the local regulations on waste disposal. Please recycle packaging where possible.

11Product overview
4 Product overview
4.1 Product designation
The product designation and the most important unit data are found on the label. The label is xed on
the right side on the DA 210 - 450 desiccant dryer, next to the control panel (see example below).
5
10
A
Model DA 400
Serial no. 1927 1927
Manuf. 2019
Voltage 230V,50Hz
Power 2.3 kW
Weight 28.0 kg
Condair Group AG
Gwattstrasse 17
8808 Pfäfkon
Switzerland
Fig. 1: Specication label
4.2 Applications
The Condair desiccant dryers is of the solid desiccant wheel type designed to dry air of atmospheric
pressure. The desiccant dryer can be used for drying air of up to 100 % relative humidity (RH) with air
temperatures from -30°C to+40°C.
The applications are numerous and widespread. Below are some examples:
– Controlling humidity levels in production processes.
– Drying of temperature sensitive products.
– Maintaining correct humidity in storage areas.
– Protection of equipment sensitive to corrosion.
– Controlling humidity levels in museums and archives.
– Drying after water damage and drying of buildings during construction.
– Climatic improvements in damp areas.

12 Product overview
4.3 Method of operation
The desiccant dryer operates with two air streams. A larger air stream to be dehumidied, and a smaller
air stream to exhaust the moisture out of the desiccant rotor. Two fans inside the desiccant dryer create
air streams which travel through the desiccant rotor in opposite directions.
The larger air volume, the process air, passes through the slowly rotating silica gel rotor. Silica gel is a
hygroscopic material adsorbing water vapour direct from the air. When passing through the rotor the
humidity of the air is reduced, whilst the moisture content of the rotor material increases. On exiting the
rotor the dried air is introduced into the area, or the process to be dehumidied. The adsorption process
works in temperatures from -30°C to +40°C.
The smaller air volume, the reactivation air, desorbs the moisture from the silica gel rotor. This reacti-
vation air is heated by an interna lheater to a temperature of approximately+120°C. As the reactivation
air passes through the rotor, in an opposite direction to the dry air, it will decrease the moisture content
of the rotor material. The reactivation air will leave the desiccant dryer as warm, moist air, which is then
exhausted out from the building.
Wet Air
Dry Air
Reactivation Air
Process Air
Fig. 2: Operation principle DA 210
Wet Air Reactivation Air
Dry AirProcess Air
Fig. 3: Operation principle DA 400-450

13Product overview
4.4 Product description
The Condair DA desiccant dryers with applied ducting meet the requirements of IEC protective class IP23.
4.4.1 Casing
The casing is fabricated from 1.4301 (AISI 304) stainless steel. The top of the desiccant dryer has a top
panel that can be removed for service access to electrical and mechanical components. All duct con-
nections to the desiccant dryer are designed for connections to standard size spiral ducts.
4.4.2 Rotor
The desiccant dryer has a drying rotor fabricated from 82% desiccant material, 16% breglass and 2%
adhesive sealant. The rotor has a matrix of corrugated and at heat resistant sheets, which houses the
Silica Gel desiccant agent. This matrix creates a large number of axial utes through the rotor, which
together builds up an immense surface area for moisture adsorption in a small volume. The rotor is
manufactured and processed to be able to withstand moisture-saturated air without being damaged.
Furthermore, the rotor will not be damaged even if the fan or the heater for reactivation should fail during
operation. The desiccant rotor is tested according to ASTM E84-18b, and the results are Flame Spread
Index (FSI) 0 and Smoke Developed Index (SDI) 0.
Rotor drive system
An electrical gear motor and a belt drive achieve the slow rotation of the rotor. The belt sits on the outer
rim of the rotor and is driven by a pulley on the drive motor. A belt tension device keeps the belt in place
and maintains tension to prevent belt slip. Correct operation of the drive system, and direction of rotation
can be checked by opening the service panel.
The centre hub of the rotor is equipped with ball bearings. The rotor shaft is made from stainless steel.
On DA 400/450 units the complete rotor assembly can easily be removed and lifted out of the housing
as one piece.
4.4.3 Filters
The desiccant dryer has two separate air lters. One in the process air inlet and one in the reactivation
air inlet and primarily protect the internal components of the desiccant dryer.
Note: Particle emissions into the dry air cannot be ruled out and require on-site ltering of the dry air for
sensitive applications.
4.4.4 Fans for process- and reactivation air
The device is equipped with two directly driven centrifugal fans, IP54 and ISO F, installed in the device.
The exact type can be found in the respective table in chapter 10.

14 Product overview
4.4.5 Heater for reactivation air
The reactivation heater is of the PTC-type (Positive Temperature Coefcient), which can not be overheated.
4.4.6 Electrical panel
The electrical components is located inside the desiccant dryer and are accessible through the top panel.
Switches and indications for operation are mounted at the front of the electrical panel.
4.4.7 Operation Options
Using the operation switch on the front side of the desiccant dryer, different running options can be
selected:
– 0 Dehumidier not in operation.
– 1 Dehumidier in operation mode.
– MAN Dehumidier in continuous operation.
– AUTO Automatic operation by remote humidistat or other external on/off signal.

15Installation
5 Installation
5.1 Installation and service access
The Condair DA 210 - 450 desiccant dryer is designed for indoor installation. The desiccant dryer should
be installed horizontally.
All components in the desiccant dryer are accessible from the top of the unit. For inspection and service,
a space of 500 mm must be left free above the desiccant dryer to accommodate for servicing of lters,
fans and rotor.
5.2 Duct connection for permanent installation
The DA 210 - 450 desiccant dryer can be installed in the room that should to be dehumidied or in a
separate room.
To obtain the best performance the outlets from the fans should be equipped with diffusors.
5.2.1 Wet air duct from the desiccant dryer
The wet air from the desiccant dryer should be exhausted to the outside. The duct should be as short
as possible to minimize the chance of condensation of the wet air. This duct should slope down in angle
of at least >2°, to stop any condensed water from owing back into the desiccant dryer. If the wet air
duct is extremely long, or must be installed sloping upwards from the desiccant dryer, it should have a
drainage point (3-5 mm) drilled at its lowest position.
The exhaust opening should have a coarse wire net.
5.2.2 Reactivation air into the desiccant dryer
The reactivation air duct into the desiccant dryer should be as short as possible. The intake opening of
the duct should have a coarse wire net, to stop foreign objects from entering the desiccant dryer. No
insulation is needed and the duct can slope up- or downwards. In some installations, as an alternative, the
reactivation air can be taken from the installation room, for this alternative no duct connection is needed.
5.2.3 Process-anddryairwiththedesiccantdryerinstalledinthedehumidiedroom
When the desiccant dryer is installed in the dehumidied room space it would normally take the process
air direct from the room without any duct system, with only a protection net for the inlet required. The
dry air outlet would normally have a duct system designed for distribution of the dry air in the building.

16 Installation
5.2.4 Process-anddryairwiththedesiccantdryerinstalledoutsidethedehumidied
room
When the desiccant dryer is installed in a separate plant room all inlet and outlet openings are usually
ducted.
The desiccant dryer takes the process air as ambient air or as pre-treated air from an HVAC, or alterna-
tively as return air from the dehumidied room. The dry air from the desiccant dryer can be connected
for posttreatment or ducted back to the dehumidied room, e.g. post cooler or lter.
A damper should be installed in the process air duct, enabling correct commissioning of the dry air vol-
ume. For a solution with a speed-controlled fan, please contact your Condair representative.
5.2.5 Duct connection for basement installation
If the DA desiccant dryer should be installed in the basement it is sometimes desirable to achieve a
slight negative pressure in the space to prevent odours from penetrating up into the building. In these
circumstances the reactivation air is taken directly from the basement and the wet air is exhausted out
from the basement. This method of installation will create a small negative pressure. The ducts should
be installed according to ”Duct connections for permanent installation”.
5.2.6 Temporary installation
With temporary installations for water damage or building drying, exible plastic ducts would normally be
used instead of the spiral duct type. The drying method differs depending on situation and construction
to be dried. The complete room could be dehumidied, or just the damaged part. For the latter option
plastic sheet is used to cover the damaged area, and the dry air is supplied under the sheet. For both
options the wet air must be exhausted out from the building via exible duct, or alternatively connected
to the general exhaust ventilation system for the building.

17Installation
5.2.7 Installation schematics
Damper process air (1) Dry air duct (2)
Wet air duct (4) Reactivation air duct (3)
Process air In Dry air Out
Wet Air Out Reactivation air In
Fig. 4: Installation schematics
1 Damper for process air: To adjust the airow to the required value during commissioning, the air
needs to be adjusted manually with a damper, which is installed at the process air inlet. The process
inlet air damper is not required if the system tted with fan speed control option (opt. EC-fan for DA
450).
2 Dry air duct: The dry air duct should be selected to have the minimum possible pressure drop (check
available external pressure in chapter 9), also to prevent unnecessary positive pressure building up
in the dry air chamber inside the unit.
3 Reactivation air duct: The reactivation air duct should be selected to have the minimum possible
pressure drop, also to prevent unnecessary negative pressure building up in the reactivation air
section inside the unit.
4 Wet air duct: The wet air duct should be insulated and the ducts should be selected to have the
minimum possible pressure drop. In this duct, there is a risk of condensation. To prevent a collection
of condensate, this duct should slope down in angle of at least >2° or has a condensate drain on its
lowest point (e.g. drill hole). Due to the limited ext. pressure generated by the built-in fan, a booster
fan may be needed in the in the wet-air duct to meet the airow and static pressure demands. An
indicator for a too low airow is a signicantly lower current draw at the reactivation heater (see
chapter 6).
5.3 Electrical installation
See chapter 11 – Electrical wiring diagrams.

18 Commissioning
6 Commissioning
On initial start-up, the following steps should be taken in this order:
1. Ensure that the external isolation switch is isolating the unit from the mains, or that the power plug
is disconnected.
2. Select the OFF position on the main switch (orange) at the front of the desiccant dryer.
3. Open the service panel on the top of the desiccant dryer and ensure no foreign objects are left inside
the unit or in the electrical compartment.
4. Check that air lters are installed and clean.
5. Rotate the fan impellers by hand and make sure they can move freely.
6. Ensure that the air dampers are open, and that ducts are clean and free of blockages.
7. Ensure that the mains supply fuse is suitably rated and that the fuse is of a slow kind.
8. Connect the desiccant dryer to the main electrical supply by turning the isolation switch to ON, or
alternatively connect the power plug to the socket.
9. Select the MAN position on the operation switch (black) of the desiccant dryer. Switch the main
switch (orange) to the ON position for 3-4 seconds. Check that the rotor is slowly rotating, the fans
are starting, and that the orange lamp in the main switch lights up. Turn OFF the desiccant dryer.
10. Mount the service panel and ensure it seals properly to the casing.
11. The desiccant dryer is now ready for operation.
12. Start the desiccant dryer and check that the unit is operating at the correct air volumes. An indication
of correct operation is if the ammeter on the front of the desiccant dryer indicates approximately:
– DA 210: 4 - 5 A
– DA 400: 10 A
– DA 450: 14,0 - 14,5 A
13. From the factory the desiccant dryer is electrically wired in such a way that when operating in AUTO
mode, the controls operate the complete unit to start or stop. By shifting one terminal connection in
the electrical panel the operation mode can be altered to operate the process air fan continuously.
The controls will then only operate the heater on /off, depending on the signal from the humidistat
or other external signal. Details see wiring wiring diagrams of the unit.

19Maintenance
7 Maintenance
7.1 Important notes on maintenance
Qualicationofpersonnel
All maintenance work must be carried out only by well qualied and trained personnel authorised by the
owner. It is the owner’s responsibility to verify proper qualication of the personnel.
General note
The instructions and details for maintenance work must be followed and upheld.
Only the maintenance work described in this documentation may be carried out.
Only use original Condair spare parts to replace faulty parts.
Safety
Some maintenance work requires removal of the unit covers. Please note the following:
DANGER!
Dangerofelectrichazard!
The Condair DA desiccant dryer is mains powered. Live parts may be exposed when the unit
is open. Touching live parts may cause severe injury or danger to life.
Prevention: Before carrying out any work set the Condair DA desiccant dryer out of operation (switch
off the unit, disconnect it from the mains) and secure the unit against inadvertent power-up.
WARNING!
Risk of injury!
Inside the Condair DA desiccant dryer there are moving parts present, which can cause seri-
ousinjurytohandsandngers.
Prevention: Before carrying out any work set the Condair DA desiccant dryer out of operation (switch
off the unit, disconnect it from the mains) and secure the unit against inadvertent power-up.
Keep hands or other body parts away from moving parts.
WARNING!
Risk of burns!
Inside the Condair DA desiccant dryer are heating element present, which can cause burns if
touched.
Prevention: Before carrying out any work set the Condair DA desiccant dryer out of operation (switch
off the unit, disconnect it from the mains), secure the unit against inadvertent power-up, and wait at
least 15 minutes prior to opening any service panel, allowing the heater to cool down.
The maintenance intervals for the desiccant dryer depend on the surrounding environment and instal-
lation site. Recommended maintenance intervals could therefore differ from one installation to another.
Incorrect maintenance and service may result in reduced dehumidication capacity.

20 Maintenance
7.2 Filters
The desiccant dryer is equipped with two separate lter banks, one for the process air and the other
for the reactivation air. The lters are positioned at the respective inlets and will clean the air prior to
entering the desiccant dryer.
Intervals for cleaning or replacement of the lters will be determined by the amount of dust and particles
in the air at the installation site.
We recommend that the lter is checked at least once a month, at least for the rst year of a new instal-
lation.
CAUTION!
Never operate the desiccant dryer without the lters, as the rotor can be damaged by dust.
7.3 Rotor
The rotor is maintenance free. However should it be necessary to clean the rotor the rst choice should
be careful use of compressed air. With severe contamination, the rotor can be washed with water. Clean-
ing with water is no routine matter; please contact your Condair representative.
Note: Due to the heat generated by the regeneration process, the white color of the sorption rotor changes
to beige or brownish over time. This is normal and does not affect the rotor's performance.
Check the rotor bearing and the rotor surface once a year.
CAUTION!
Airborne chemical compounds, e.g. oily vapors or solvents can also be adsorbed by the rotor and
permanently reduces its capacity.
7.4 Electrical motors
The electrical motors are equipped with ball bearings. The bearings are designed to last the life of the
motor and therefore no maintenance is required.
Check the motors once a year for any abnormal sound.