Cotes C105 User manual

COTES C105 OPERATING AND SERVICE HANDBOOK page 1/67
COTES ALL ROUND
C105
How to install, set up, operate and service your
Cotes dehumidifier
Cotes dehumidifier C105E/C105D
Manual number: 140739
Revision: D

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COTES.COM

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CONTENTS
SECTION 1 / GENERAL BACKGROUND 5
ABOUT THIS HANDBOOK 5
ABOUT COTES 7
SECTION 2 / THE DEHUMIDIFIER 8
ABOUT THE COTES C105 RANGE OF DEHUMIDIFIERS 8
HOW IT WORKS 12
FEATURES AND BENEFITS 14
SECTION 3 / TECHNICAL DETAILS 16
SERIAL NUMBER/IDENTIFICATION 16
SPECIFICATIONS 17
ASSEMBLIES AND COMPONENTS 18
SPARE PARTS 23
SOUND LEVELS 26
SECTION 4 / INSTALLATION 27
HOW TO INSTALL A C105E/C105D DEHUMIDIFIER 27
HOW TO COMMISSION THIS DEHUMIDIFIER 35
SECTION 5 / OPERATION 40
HOW TO OPERATE WITH BASIC-PLR BASED DEHUMIDIFIER 40
HOW TO OPERATE WITH PLC BASED DEHUMIDIFIER 44
SECTION 6 / SERVICE AND REPAIR 48
HOW TO SERVICE AND REPAIR THIS DEHUMIDIFIER 48
TROUBLESHOOTING 61
SECTION 7 / FORMALITIES AND GENERAL/LEGAL INFO 63
WARRANTIES 63
LEGAL NOTICES 64
EU DECLARATION OF CONFORMITY 65
HOW TO UPDATE AND IMPROVE THIS COTES DEHUMIDIFIER 66
WHOM TO CONTACT 67

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ELECTRICAL DIAGRAMS APPENDIX
CASCADE HEAT CONTROLLER APPENDIX
ALTERNATIVE HEATING SOURCES (if applicable) APPENDIX
ALTERNATIVE HEATING SOURCES APPENDIX C

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SECTION 1 / GENERAL BACKGROUND
ABOUT THIS HANDBOOK
This is the installation and service handbook for your Cotes 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 Cotes
dehumidifier unit, who carry out preventive maintenance and who replace defective parts.
Anyone using Cotes 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 service handbook is 140739.
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.

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ABOUT COTES
Cotes 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.
Cotes 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.
World leader
Cotes 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
Cotes 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 COTES C105 RANGE OF DEHUMIDIFIERS
The Cotes C105 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.
C105E units are specifically configured to minimize the overall energy consumption of the
dehumidification process, whereas C105D units are configured to make sure the air flow is as dry as
possible.
Dehumidifiers in the Cotes C105 range are designed for high serviceability and easy cleaning, with
add-on configuration options that include cooling/heating coils and/or a heat recovery module.
Design priorities
The Cotes C105 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 Cotes C105 range currently features models with air volumes of between 4000 m3/hour and
8800 m3/hour.
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 25 kg/hour and 51 kg/hour.

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Configuration priorities
The Cotes C105 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 PLR
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 Cotes)
•Over-heating alarm
•Remote start/stop option
•External fault signal and operation signal
•Manually adjustable process and regeneration air fans, making installation easier
Configuration-B
In addition to the Configuration-A features, the Configuration-B provides:
•Attachment of one external humidity sensor
•5.7-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 from the PLC menu, 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 Cotes service centre (optional)

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Configuration-C
In addition to the Configuration-B features, the Configuration-C provides:
•Automatic adjustment of process and regeneration air fans based on the selected program
•Monitoring and control of air flows [m3/hour]
•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-C 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
Configuration combinations with optional modules
The table below shows the possible combinations of optional modules with C105, depending on
configuration.
The “Alternative Heating” modules are built into the C105 dehumidifier and thus cannot be retrofitted
or changed after purchase.
The Pre-module, Post-module and HR-modules are all external modules and can be purchased
together with the C105 dehumidifier or can be retrofitted to an existing C105 installation.
In case you would like to add an external module to you C105 dehumidifier, please contact your local
COTES dealer, or contact COTES directly, for more information.
Module
Type
BASIC
PLC B
PLC C
PLC D
Alternative Heating
Steam
X
X
Alternative Heating
EW (Electric + Water)
X
X
PRE –module
Cooling
X
X
X
PRE –module
Heating
X
X
X
PRE –module
Cooling/Heating
X
X
X
POST - module
Cooling
X
X
X
POST –module
Heating
X
X
X
POST –module
Cooling/Heating
X
X
X
HR –Module
HR module (Only HR)
X
X
X
HR –Module
HR module w. Pre-cooling
X
X
X
HR –Module
HR module w. Pre-heating
X
X
X
HR –Module
HR module w. Pre-
cooling/heating
X
X
X

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Intended use of dehumidifier
The dehumidifier is designed for dehumidifying/conditioning atmospheric air only –filtered with at
least a G4 filter. Unless specifically stated in the manual or in a separate agreement with Cotes or a
Cotes dealer, this dehumidifier must not be used for the following purposes:
•Conditioning of gases other than atmospheric air at ambient pressure
•Conditioning of air contaminated with any chemical or other aggressive/corrosive elements
including salt (sodium chloride)
•Conditioning of explosive or flammable air –including using the dehumidifier in ATEX-
classified zones.
The unit is intended to be installed in industrial environments and conforms with the EMC emission
limits for environments of this kind. Please take appropriate remedial measures to ensure compliance
with the requirements that apply in your specific residential, commercial or light industry environment.
Operating conditions –standard models (E and D)
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.
Depending on configuration the actual sensor range may be limited to 5-100 %.
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 Cotes 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 process air is controlled by the process fan (C) which builds up
a pressure difference and forces the air through the dehumidifier. The air passes through a slowly
turning rotor (D) 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 (E) leaves the rotor containing less moisture
(humidity) than when it entered. And because the adsorption process releases energy to the air, the
temperature increases during the process.
The regeneration process (F to K)
The second air flow (the regeneration air) (F) is filtered by a regeneration air filter (G), and heated by
heating elements (H) to reduce its relative humidity. On its way through the rotor (I), the energy from
the hot air 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 (K). The
regeneration air is controlled by a regeneration air fan (J).

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Fans
All units in the C105 range of adsorption dehumidifiers are fitted with two fans as standard.
Configuration-B: With this configuration, the speed of the regeneration air fan can be controlled.
Configuration-C and Configuration-D: With these configurations, the flow of process air and
regeneration air can be controlled manually or automatically (standard). See “Extended PLC manual”
for details.
Cotes 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 dehumidifier, see page 24.
Filters
All models of Cotes 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 Cotes C105 units as standard in order to filter the incoming
process air.
For details about the filters fitted to this dehumidifier, see page 24.
Heating units
Cotes C105 dehumidifiers are fitted with electrical heating units, as standard, to control the
temperature of the regeneration air entering the unit.
Cotes C105 dehumidifiers can be fitted with steam heating units or hot water + electrical heating
units, on request. In such cases, certain characteristics of the dehumidifier will change.
If your Cotes dehumidifier is fitted with these heating units, see “Appendix – Alternative heating
sources” to find out which points differ from standard.
For details about Cotes dehumidifiers fitted with alternative heating units, please contact your Cotes
dealer, or Cotes.
For details about heating units fitted to this dehumidifier, see page 24.

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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.
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.
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.
Highly durable rotor bushings.
Savings on maintenance and service work.
Greater operating efficiency.
Air flow
Available with frequency-controlled ventilator.
Savings on energy costs.
Less noise

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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 common electrical voltages
and frequencies
•400V
•50Hz
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 Cotes dehumidifier.
The serial number/identification code for your specific model is located on the right side of the
dehumidifier (see drawing below).
V HZ SUPPLY
KG
ITEM NO.
TYPE
NO
KW HEAT KW TOTAL
Cotes A/S
Ndr. Ringgade 70C
DK 4000 Slagelse
105111E-XX
C105E-25.7 3x400V/50Hz PLC-B
YY.XXXXXX
730
400
50
3PH+PE
33.6
41.1
Serial number example:
19.12345
12345 = Serial number
19 = 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 C105E/C105D
Type
C105E
C105D
Model
25
31
39
46
51
32
44
Dry air, nominal**
[m3/hour]
4100
6100
8800
8800
8800
4000
6000
Regen. air, nominal*
[m3/hour]
1100
1350
1650
1900
1900
1350
1900
External pressure, dry
air [Pa]
(at nominal air flow)
400
400
400
400
400
400
400
External pressure,
regen. air [Pa]
(at nominal air flow)
400
400
400
400
400
400
400
Capacity at 20ºC, 60%
relative humidity
[kg/hour]
25.1
31
39.1
45.8
50.5
31.7
43.5
Electric heater, max.
[kW]
33.6
42
50.4
58.8
67.2
42
58.8
Maximum Fuse [A]
(3x400V)
125
125
125
125
125
125
125
Minimum Fuse [A]
60
75
90
100
110
70
95
Max nominal power
consumption
[kW]
38
49
59
67
75
47
66
Voltage [V]
400
Frequency[Hz]
50 / 60
Ground
3PH+PE
Preliminary Sound level
with ducts [dB(A)] ***
<60
<66
<75
<75
<75
<60
<66

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* Adjustable in Configuration-B and fully controlled in Configuration-C and Configuration-D.
Also adjustable in Configuration-A with Reg. Air Fan Kit installed.
** Fully controlled in Configuration-C and Configuration-D.
*** The dB values for noise levels are guidelines only and not exact values, because these depend
on the specifics of each installation. If exact values are needed, professional noise measurements
must be carried out at the actual site and installation.
Table 2 Measurements
Type
C105E
C105D
Model
25
31
39
46
51
32
44
L x W x H
cabinet
mm
1985 x 1320 x 2152
L x W x H
total
mm
2090 x 1320 x 2152
Weight
kg
710
710
745
745
745
710
745
Regeneration
air outlet
mm
Ø315
Regeneration
air inlet
mm
647x420 (Ø315)
Process air
inlet
mm
998x695
Process air
outlet
mm
998x695 (Ø630)
Power cable
size *
mm
Cable glands: 2xM63 –Cable size / sealing range: 36-48
* Power cables are not part of the Cotes delivery.
If the selected cable is smaller than sealing range, install a suitable cable gland.
NOTE
Due to the noise levels during normal operation, any personnel continuously exposed to this
noise must wear hearing protection.

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ASSEMBLIES AND COMPONENTS
Customised to meet your needs
Cotes dehumidifier units are based on a modular design that enables our customers to select from a
broad range of carefully selected components and assemblies, to meet specific installation and
operating requirements.
If purchased through Cotes or an official Cotes dealer, the Cotes C105 dehumidifier can be
configured to meet the specific requirements of your installation.
Dimensions and duct connections
The C105 dehumidifier can be purchased with a connection kit for either rectangular or round ducts.
The rectangular duct connection kit has been designed to fit with standard rectangular air ducts and
connected using standard 20 mm “C”-shaped drive cleats. (Note: the 20 mm is measured over the
back of the drive cleat, so that the width of the drive cleat is 20 mm). The length of the “C”-shaped
drive cleat should be matched to the full length of the connected section on the air ducts. For details
about the rectangular duct connection kit, see detail “AB” in the lower left corner of the illustration
below.
Please see the following illustrations with the dimensions of the dehumidifier and the duct
connections:

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