Cotes C35 Service manual

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COTES ALL ROUND
C35
How to install, set up, operate and service your
Cotes dehumidifier
Cotes dehumidifier C35E/C35D/C35C
Manual number: 140712
Revision: O.2

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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 C35 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 26
SOUND LEVELS 30
SECTION 4 / INSTALLATION 31
HOW TO INSTALL A C35 DEHUMIDIFIER 31
ADDITIONAL INFORMATION FOR A C35C DEHUMIDIFIER (COLD STORE MODEL) 35
HOW TO COMMISSION THIS DEHUMIDIFIER 37
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
SECTION 7 / CONDENSATION OR HEAT RECOVERY UNIT 58
RECOMMENDED COMBINATIONS OF DEHUMIDIFIERS AND MODULES 58
SPECIFICATIONS, ASSEMBLIES AND COMPONENTS 59
HOW TO INSTALL A CONDENSATION UNIT OR HEAT RECOVERY UNIT 62
HOW TO ADJUST THE AIR FLOW WITH THE HR MODULE 65
SECTION 8 / FORMALITIES AND GENERAL/LEGAL INFO 67
WARRANTIES 67
LEGAL NOTICES 68

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EU DECLARATION OF CONFORMITY 69
HOW TO UPDATE AND IMPROVE THIS COTES DEHUMIDIFIER 70
WHOM TO CONTACT 71
ELECTRICAL DIAGRAMS APPENDIX

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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 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.

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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 C35 RANGE OF DEHUMIDIFIERS
The Cotes C35 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.
C35E units are specifically configured to minimise the overall energy consumption of the
dehumidification process, whereas C35D units are configured to make sure the air flow is as dry as
possible. C35C units are specially designed to operate inside cold storage facilities.
The dehumidifiers in the C35 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 Cotes C35 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 C35 range currently features models with air volumes of between 405 m3/hour and 1,000
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 3.3 kg/hour and 5.6 kg/hour.
At process air inlet conditions from -25°C to -18°C and 95% relative humidity (%RH), the capacities
(the amount of water which can be removed from the air) of these units are between 0.3 kg/hour and
0.9 kg/hour.

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Configuration priorities
The Cotes C35 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 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
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
•Datalogging 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:
•Control of process air fan, making installation easier
•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
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 gases other than atmospheric air at ambient pressure
•Conditioning air contaminated with any chemical or other aggressive/corrosive elements
including salt (sodium chloride)
•Conditioning explosive or flammable air –including using the dehumidifier in ATEX-
classified zones.
The unit is intended for use in residential, commercial and industrial environments.
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 %.