Condair DA Series User manual

INSTALLATION AND
OPERATION MANUAL
Desiccant dryer
Condair DA 35
XXXXXXX EN 1704
Dehumidication and Drying

Thank you for choosing Condair
Installation date (MM/DD/YYYY):
Commissioning date (MM/DD/YYYY):
Site:
Model:
Serial number:
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This document and the information disclosed herein are proprietary data of Condair Group AG. Neither this docu-
ment, nor the information contained herein shall be reproduced, used, or disclosed to others without the written
authorisation 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 authorised by Condair Group AG.
Copyright Notice
© Condair Group AG, All rights reserved.
Technical modications reserved.

CONDAIR DA35E / DA 35D / DA 35C OPERATING AND SERVICE HANDBOOK page 3/128
CONTENTS
SECTION 1 / GENERAL BACKGROUND 4!
ABOUT THIS HANDBOOK 4!
ABOUT MANAGING HUMIDITY 6!
ABOUT CONDAIR 7!
SECTION 2 / THE DEHUMIDIFIER 8!
ABOUT THE CONDAIR DA35E / DA 35D / DA 35C RANGE OF DEHUMIDIFIERS 8!
HOW IT WORKS 12!
FEATURES AND BENEFITS 16!
SECTION 3 / TECHNICAL DETAILS 18!
SERIAL NUMBER/IDENTIFICATION 18!
SPECIFICATIONS 19!
ASSEMBLIES AND COMPONENTS 27!
SOUND LEVELS 34!
SECTION 4 / INSTALLATION 35!
HOW TO INSTALL THIS DEHUMIDIFIER 35!
HOW TO INSTALL A CONDENSATION UNIT OR HEAT RECOVERY UNIT 39!
HOW TO INSTALL A DA 35C (COLD STORE MODEL) 42!
HOW TO COMMISSION THIS DEHUMIDIFIER 45!
SECTION 5 / OPERATION 48!
HOW TO OPERATE THIS DEHUMIDIFIER 48!
HOW TO OPERATE THE DA 35E/ DA 35D CONFIGURATION-A 104!
SECTION 6 / SERVICE AND REPAIR 106!
HOW TO SERVICE AND REPAIR THIS DEHUMIDIFIER 106!
SECTION 7 / FORMALITIES AND GENERAL/LEGAL INFO 118!
WARRANTIES 118!
LEGAL NOTICES 119!
EU DECLARATION OF CONFORMITY 120!
HOW TO UPDATE AND IMPROVE THIS CONDAIR DEHUMIDIFIER 122!
WHO TO CONTACT 123!
ELECTRICAL DIAGRAMS APPENDIX

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SECTION 1 / GENERAL BACKGROUND
ABOUT THIS HANDBOOK
This is the installation and service handbook for your Condair dehumidifier.
You should read the whole handbook before installing and/or starting the dehumidifier unit for the first
time. It is important that you and your colleagues are familiar with the correct operating procedures
and all precautionary safety measures, in order to avoid any damage to the surroundings, materials
or installations, as well as to prevent any personal injury.
This handbook is mainly intended for use by technicians who install and operate this Condair
dehumidifier unit, who carry out preventive maintenance and who replace defective parts.
Anyone using Condair dehumidifier units, or whose responsibilities include supervising their
operation, will also benefit from reading this handbook and from consulting it as a practical help
should the need arise.
Product number for this handbook
The product number of this particular service handbook is 140712.
This is the number you need to give us if you would like to order additional copies for your staff,
colleagues or service personnel, or for technical staff from outside your company.

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SYMBOLS USED IN THIS HANDBOOK
This tells you to perform a particular action
Important to note, because items in the dehumidifier can cause injury or affect
people’s health
You need to pay special attention to this
NOTE
It is each operator’s responsibility to read and understand this manual and other information
and to employ the correct operating and maintenance procedures.

CONDAIR DA35E / DA 35D / DA 35C OPERATING AND SERVICE HANDBOOK page 6/128
ABOUT MANAGING HUMIDITY
Condair humidity management technology – cost-effective and energy-efficient
The moisture in the air all around us has surprising – and often costly – effects on the materials,
structures and processes at the heart of virtually all business processes and industrial activity.
Condair humidity management technologies enable you to control the levels of moisture in the air
inside any building, installation or facility, using only a bare minimum of energy.
And effective control of the basic parameters for your operations is good business.

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ABOUT CONDAIR
World leader
Condair is one of the world’s leading experts in the field of adsorption dehumidification, providing
technology and expertise that enable companies to achieve better control of the humidity always
present in the air.
Better management of the humidity in the air also makes it possible to improve and optimise a wide
range of industrial processes, prevent damage and corrosion in many types of structures, and reduce
energy consumption in all kinds of installations where air specifications are important.
Big benefits
Condair dehumidification units provide exceptional advantages.
• Our know-how and experience make sure each customer gets the right equipment to tackle all
the practical needs and operating priorities associated with the specific installation
• Our units are exceptionally reliable, and can withstand even harsh treatment unusually well
• They are very easy to maintain and service
• They only use a minimum of energy in order to achieve maximum effect.
We aim to provide our customers with the most technically effective and energy-efficient solution for
the best price. This ensures the best possible return on investment, as well as peace of mind about
having made the best decision.

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SECTION 2 / THE DEHUMIDIFIER
ABOUT THE CONDAIR DA35E / DA 35D / DA 35C RANGE OF
DEHUMIDIFIERS
The CONDAIR DA35E / DA 35D / DA 35C range of dehumidifiers is designed and configured for a
wide range of industrial uses. Prominent among these is humidity management in storage facilities
and basement areas, in water works and in many kinds of process industry in which stable, well-
controlled air conditions are crucial.
DA 35E units are specifically configured to minimise the overall energy consumption of the
dehumidification process, whereas DA 35D units are configured to make sure the air flow is as dry as
possible. DA 35C units are specially designed to operate inside cold storage facilities.
The dehumidifiers in the DA 35E/DA 35D/DA 35C range are designed for easy cleaning, with
configuration options that include cooling/heating coils and/or a heat recovery module and a
condensation module and additional filters, if needed.
Design priorities
The CONDAIR DA35E / DA 35D / DA 35C range features an eye-catching modern industrial design
appearance, along with exceptional reliability.
It is designed to ensure the unhindered passage of air through the unit, which reduces
• energy consumption
• pressure losses
• noise levels
All the components, ancillary equipment and features are optimised for better performance,
exceptional service life and ease of maintenance.
Capacities
The CONDAIR DA35E / DA 35D / DA 35C range currently features models with air volumes of
between 405 m3/hr and 1,000 m3/hr.
At process air inlet conditions of 20°C and 60% relative humidity (%RH), the capacities (the amount
of water which can be removed from the air) of these units are between 3.3 kg/hr and 5.6 kg/hr.

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Configuration priorities
The CONDAIR DA35E / DA 35D range is available with four different control configurations –
Configuration-A, Configuration-B, Configuration-C and Configuration-D.
Control configuration-A is stripped down to a minimum of features and is therefore not equipped with
a PLC screen interface.
Configuration-A/BASIC
The Configuration-A configuration provides:
• High dehumidification capacity
• High energy efficiency
• Stainless steel cabinet
• Easy installation
• Low-noise running
• Low maintenance costs, reducing the overall operating cost
• Easy cleaning
• Hour counter, to keep track of how long the unit has been in operation
• Attachment of external humidity sensor (external humidify control and sensors are not
included as standard, but are available for purchase from Condair)
• Mechanical hour counter, to keep track of how long the unit has been in operation
• Over-heating alarm
• Remote start/stop option
• External fault signal and operation signal

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Configuration-B
In addition to the Configuration-A features, the Configuration-B provides:
• Attachment of one external humidity sensor
• 3.5-inch touch display
• Service indication, to keep track of any need for maintenance
• Hour counter, to keep track of how long the unit and components has been in operation
• Mechanical service alarm for rotor and filters
• Control of regeneration air fan, making installation easier
• Capacity control / modulating heat control
• Measuring and controlling dew point temperature
• Data logging for keeping track of conditions in the space where the unit is installed
• Timer program
• Network connectivity (optional)
• Monitoring and control via smartphone app (optional)
• Monitoring and control by Condair service centre (optional)
Configuration-C
In addition to the Configuration-A and Configuration-B features, the Configuration-C provides:
• Control of process air fan, making installation easier
• Monitoring and control of air flows [m3/hr]
• Energy-saving program, for situations where energy consumption is the prime consideration
• Low-noise program, for situations where silence is the prime consideration
• CUSTOM program, for situation where dehumidifier parameters needs to be controlled
Configuration-D
In addition to the Configuration-A and Configuration-B features, the Configuration-D provides:
• Accurate control of humidity level, whether % relative humidity or specific humidity [g/kg]
• Continuous measurement of capacity
• Detailed energy-saving program, for situations where energy consumption is the prime
consideration

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Operating conditions
For the process and regeneration air inlet, the following operating conditions must be respected:
Relative humidity 0–100%
Temperature 0–40°C
Pressure Ambient ± 100 Pa
It is only possible to deviate from these ranges if such deviations were specifically mentioned when
the order was placed, and special considerations have been incorporated into the unit in order to deal
with this.
NOTE
Operating conditions for the air inlet flows must be respected.
Storage conditions
For storing the dehumidifier, the following conditions must be respected:
Relative humidity 0–90%
Temperature -20°C to 50°C
It is only possible to deviate from these ranges if such deviations were specifically mentioned when
the order was placed, and special considerations have been incorporated into the unit in order to deal
with this.
NOTE
Storage conditions for the dehumidifier must be respected.

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HOW IT WORKS
Two flows of air
The effect of Condair adsorption dehumidifiers basically stems from the action of two flows of air.
The drying process (A to E)
The incoming moisture-laden flow of air (process air) (A) enters one side of the cabinet and gets
filtered by a process air filter (B). The air then passes through a slowly turning rotor (C) whose inner
surfaces are coated with desiccant silica crystals that attract the water molecules passing through.
When the moist air passes through the rotor, water molecules are adsorbed and lodge in the pores
on the surface of the silica gel. This means the air leaves the rotor containing less moisture (humidity)
than when it entered (E). And because the adsorption process releases energy to the air, the
temperature increases during the process. The process air is controlled by a process air fan (D).

CONDAIR DA35E / DA 35D / DA 35C OPERATING AND SERVICE HANDBOOK page 13/128
The regeneration process (F to J)
The second air flow (the regeneration air) (J) is filtered by a regeneration air filter (K), and heated by
heating elements (I) to reduce its relative humidity. On its way through the rotor (H), this heat
evaporates the moisture previously adsorbed by the silica crystals in the rotor. The resulting water
vapour now leaves the dehumidifier in the outgoing regeneration air (F). The regeneration air is
controlled by a regeneration air fan (G).
Fans
All units in the DA 35E/DA 35D/DA 35C range of adsorption dehumidifiers are fitted with two fans as
standard.
For the Configuration-B, the speed of the regeneration air fan can be controlled.
For the Configuration-C and Configuration-D, the flows of process air and regeneration air flows can
be controlled manually or automatically (standard).
Condair adsorption dehumidifiers are always configured with a certain amount of “external pressure”
to make sure that ducting does not cause a reduction in the amount of air.
For details about the fans fitted to this particular Condair dehumidifier, see page 31.
Filters
All models of Condair adsorption dehumidifiers are fitted with filters to remove undesirable particles
or other pollutants from the incoming process and regeneration air.
Filters of the G4 class are fitted to Condair DA 35E / DA 35D units as standard in order to filter the
incoming process air.
The regeneration air filter is a high-temperature resistance filter, as an additional safety precaution
should power loss occur during operation.
For details about the filters fitted to this particular Condair dehumidifier, see page 31.
Heating units
CONDAIR DA35E / DA 35D / DA 35C dehumidifiers are fitted with electrical heating units as
standard, in order to control the temperature of the regeneration air entering the unit.
For details about heating units fitted to this particular Condair dehumidifier, see page 31.

CONDAIR DA35E / DA 35D / DA 35C OPERATING AND SERVICE HANDBOOK page 14/128
Post-heating units
Being able to control the exact specifications of the air leaving the dehumidifier enables you to extract
maximum benefit from Condair humidity management.
If it is important to keep the process air at a consistently high temperature, a post-heating unit can be
fitted after the adsorption rotor, as optional equipment.
A post-heating unit is normally in combination with a post-cooling coil, in order to ensure 100%
control of both relative humidity and temperature.
Post-heating units can be retrofitted to DA 35E / DA 35D dehumidifiers with the Configuration-B,
Configuration-C and Configuration-D.
For details about any post-heating units fitted to this particular Condair dehumidifier, please contact
your Condair dealer, or Condair.
Pre-cooling units
Being able to control the exact specifications of the air entering the dehumidifier enables you to
extract maximum benefit from Condair humidity management.
Condair DA 35E/DA 35D dehumidifiers can therefore be fitted with cooling units to reduce and/or
control the temperature of the dry air entering and leaving the dehumidifier.
A cooling unit fitted before the adsorption rotor is particularly beneficial if the incoming process air is
very warm and humid. In such cases, some of the water in the air condenses and the efficiency of the
adsorption rotor increases. A cooling unit fitted before the adsorption rotor can also be an advantage
if the outgoing process air has to be especially dry.
Pre-cooling units can be retrofitted to DA 35E / DA 35D dehumidifiers with the Configuration-B,
Configuration-C and Configuration-D.
For details about any pre-cooling units fitted to this particular Condair dehumidifier, please contact
your Condair dealer, or Condair.
Post-cooling unit
Condair DA 35E / DA 35D units can be fitted with post-cooling/heating units to maintain full control of
the temperature of the dry air leaving the dehumidifier.
Post-cooling/heating units can be retrofitted to DA 35E / DA 35D dehumidifiers with the
Configuration-B, Configuration-C and Configuration-D.
For details about any cooling units fitted to this particular Condair dehumidifier, please contact your
Condair dealer, or Condair.

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Heat recovery unit (HR module)
Condair adsorption dehumidifiers can be fitted with a heat exchanger to make sure that part of the
thermal energy from the regeneration air leaving the unit is extracted, and reused for preheating the
incoming regeneration air.
The heat exchanger is placed in an external box equipped with inlets and outlets for the incoming and
outgoing regeneration air.
The heat recovery unit can save as much as 20–25% on energy consumption, and can be fitted to all
configurations of DA 35E/DA 35D dehumidifiers.
The heat recovery unit can be fitted to DA 35E/DA 35D dehumidifiers with the Configuration-A, but
you have to install the appropriate ducting and damper for outgoing regeneration air.
For details about the heat recovery unit fitted to this particular Condair dehumidifier, please contact
your Condair dealer, or Condair.
Water condensation unit (LK module)
Condair adsorption dehumidifiers can be fitted with water condensation units in order to condense
some of the water from the regeneration air leaving the dehumidifier. This is beneficial when a
regeneration air outlet is not a good idea or cannot be fitted.
When a water condensation unit is installed, the regeneration air forms a closed circuit, using
ambient air passing through heat exchangers to cool the regeneration air to below condensation
temperature.
A water condensation unit can be fitted to all configurations of DA 35E / DA 35D dehumidifiers. In
Configuration-A, the dehumidifier must be fitted with a dedicated Reg Air Fan Kit in order to reduce
the regeneration air flow for optimal performance.
See the electrical diagram for detailed electrical connections and installation.
For details about the water condensation unit fitted to this particular Condair dehumidifier, please
contact your Condair dealer, or Condair.

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FEATURES AND BENEFITS
Highlighted features
How customers benefit
Appearance/cabinet
Eye-catching industrial design appearance.
Visually attractive units that can be mounted
in highly visible positions.
Inner surfaces made of stainless steel.
Easy cleaning saves on time and manpower.
Helps keep hygiene standards high and visual
appearance good.
Outer surfaces made of stainless steel, as
standard.
Helps keep technical installations looking
modern and attractive.
Reinforces impression of quality.
Robust structure.
Longer service life.
Better return on investment.
Equipment configurations inside the cabinet
All fans are mounted inside the cabinet.
Can be mounted in a wider range of positions
and structures, even where there is public
access, etc.
Easy to mount additional insulation and noise
suppression equipment.
Configurations individually customised to each
project/installation.
Key components are standardised units easily
available throughout the world.
Less downtime.
Savings on maintenance and service work.
Most effective rotor currently available
anywhere in the world.
Most humidity removed from the flow of air at
lowest cost.

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Highly durable rotor bushes.
Savings on maintenance and service work.
Greater operating efficiency.
Air flow
Available with frequency-controlled ventilator.
Savings on energy costs.
Less noise
Access
Large door that provide rapid, easy access.
Savings on maintenance and service work.
Less downtime means greater operating
efficiency.
Filters that are easy to get out, and quick to
change.
Savings on maintenance and service work.
Greater operating efficiency.
Connectivity
Compatible with all standard electrical
voltages and frequencies
• 230V/400V/440V
• 50Hz/60Hz.
Savings on installation costs.
More rapid commissioning.
Designed for compatibility with modern PLC
and web-based control and warning systems.
Easy to control and monitor from virtually
anywhere.
Modular design prepared for installation of
control systems, heaters, cooling systems,
hygrometers, sensors, etc.
Rational, cost-effective dehumidification
installations.
Maximum reliability.
Energy sources
Thermal recovery installations can be fitted.
Savings on energy costs
Improved environmental footprint.

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SECTION 3 / TECHNICAL DETAILS
SERIAL NUMBER/IDENTIFICATION
This is the installation and service handbook for your Condair dehumidifier.
The serial number/identification code for your particular model is located in the top of the dehumidifier
(see drawing below).
V HZ SUPPLY
KG
ITEM NO.
TYPE
NO
KW HEAT
KW TOTAL
Condair Group AG
Talstrasse 35-37
CH-8808 Pfäffikon SZ
35133E-20
DA 35E-3.3 3x400V/50Hz PLC-B
YY.XXXXXX
102.0
400
50
3PH+N+PE
4.6
5.1
Serial number:
Example:
15.12345
12345 = Serial number
15 = Year of production

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SPECIFICATIONS
Please note that specifications and controls given in this handbook are in some situations
approximate.
Table 1 Technical data DA 35E/DA 35D
Type
DA 35E
DA 35D
LK
Model
3.3
3.8
4.5
5.1
5.6
3.2
4.5
-
Dry air,
nominal**
m3/hr
750
1000
1000
1000
1000
405
617
-
Regeneration
air, nominal*
m3/hr
135
135
168
202
233
135
202
-
External
pressure, dry
air (at nominal
air flow)
Pa
210
210
210
210
210
210
210
-
External
pressure,
regeneration air
(at nominal air
flow)
Pa
300
300
300
300
250
300
300
-
Capacity at
20ºC, 60%
relative
humidity
kg/hr
3.3
3.8
4.5
5.1
5.6
3.2
4.5
-
Electric heater,
max.
kW
4.6
4.6
5.7
6.9
8.0
4.6
6.9
-
Maximum fuse
(3x230V)
A
10
(32)
10
(32)
16
(32)
16
(32)
16
(32)
10
(32)
16
(32)
-
Minimum fuse
(3x230V)
A
10
(20)
10
(20)
16
(25)
16
(25)
16
(32)
10
(20)
16
(32)
-

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Nominal power
consumption
kW
4.92
5.10
6.25
7.42
8.50
4.86
7.26
0.17
Maximum
connected load
kW
5.10
5.40
6.50
7.70
8.80
5.10
7.70
0.17
Voltage
(3x230V)
V
400
(3x230)
1x230
Frequency
Hz
50
50
Ground
(3x230V)
3PH+N+PE
(3PH+PE)
1 PH+
PE
Sound level
with duct
(ISO11201)
dB(A)
53
59
59
59
59
53
53
-