Cotes C35 Operating And Service Manual
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Cotes C35 Operating And Service Manual

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COTES C35 OPERATING AND SERVICE HANDBOOK
Cotes dehumidifier
Manual number:
Revision:
COTES ALL ROUND
C35
How to install, set up, operate and service your
Cotes dehumidifier
C35E/C35D/C35C
140712
O
.2
page 1/71

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  • Page 1 COTES C35 OPERATING AND SERVICE HANDBOOK page 1/71 Cotes dehumidifier C35E/C35D/C35C Manual number: 140712 Revision: COTES ALL ROUND How to install, set up, operate and service your Cotes dehumidifier...
  • Page 2 COTES C35 OPERATING AND SERVICE HANDBOOK page 2/71 COTES.COM...

  • Page 3: Table Of Contents

    3/71 CONTENTS SECTION 1 / GENERAL BACKGROUND ABOUT THIS HANDBOOK ABOUT COTES SECTION 2 / THE DEHUMIDIFIER ABOUT THE COTES C35 RANGE OF DEHUMIDIFIERS HOW IT WORKS FEATURES AND BENEFITS SECTION 3 / TECHNICAL DETAILS SERIAL NUMBER/IDENTIFICATION SPECIFICATIONS ASSEMBLIES AND COMPONENTS...
  • Page 4 COTES C35 OPERATING AND SERVICE HANDBOOK page 4/71 EU DECLARATION OF CONFORMITY HOW TO UPDATE AND IMPROVE THIS COTES DEHUMIDIFIER WHOM TO CONTACT ELECTRICAL DIAGRAMS APPENDIX...

  • Page 5: Section 1 / General Background

    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.
  • Page 6 COTES C35 OPERATING AND SERVICE HANDBOOK page 6/71 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...

  • Page 7: About Cotes

    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.

  • Page 8: Section 2 / The Dehumidifier

    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.
  • Page 9 COTES C35 OPERATING AND SERVICE HANDBOOK page 9/71 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.
  • Page 10 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: •...
  • Page 11 COTES C35 OPERATING AND SERVICE HANDBOOK page 11/71 Operating conditions – Cold store models (C) For the process and regeneration air inlet, the following operating conditions must be respected: Relative humidity 0–100% -25 - 0°C (can be used up to 40 C) Temperature process -25 - 40°C...

  • Page 12: How It Works

    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).
  • Page 13 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 C35 units as standard in order to filter the incoming process air.
  • Page 14 Cotes dealer, or Cotes. Heat recovery unit (HR module) Cotes 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.
  • Page 15 15/71 Water condensation unit (LK module) Cotes 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.

  • Page 16: Features And Benefits

    COTES C35 OPERATING AND SERVICE HANDBOOK page 16/71 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.
  • Page 17 COTES C35 OPERATING AND SERVICE HANDBOOK page 17/71 Highly durable rotor bushes. Savings on maintenance and service work. Greater operating efficiency. Air flow Savings on energy costs. Available with frequency-controlled ventilator. Less noise Access Savings on maintenance and service work.

  • Page 18: Section 3 / Technical Details

    18/71 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 particular model is located in the top of the dehumidifier (see drawing below). ITEM NO.

  • Page 19: Specifications

    COTES C35 OPERATING AND SERVICE HANDBOOK page 19/71 SPECIFICATIONS Please note that specifications and controls given in this handbook are in some situations approximate. Table 1 Technical data C35E/C35D/C35C C35E C35D C35C Type Model Dry air, 1000 1000 1000 1000...
  • Page 20 COTES C35 OPERATING AND SERVICE HANDBOOK page 20/71 Electric heater, max. External duct heater, max. Maximum fuse (32) (32) (32) (32) (32) (32) (32) (3x230V) Minimum fuse (20) (20) (25) (25) (32) (20) (32) (32) (32) (3x230V) Nominal power 4.92 5.10...
  • Page 21 COTES C35 OPERATING AND SERVICE HANDBOOK page 21/71 Table 2 Measurements C35E C35D C35C Type Model L x W x H 492.5 x 756 x 1091 cabinet L x W x H 532 x 756 x 1091 total Weight Regeneration ø125...
  • Page 22 COTES C35 OPERATING AND SERVICE HANDBOOK page 22/71 Capacities Figure 1 C35E-3.3 capacity at 750 m /hour Figure 2 C35E-3.8 capacity at 1,000 m /hour...
  • Page 23 COTES C35 OPERATING AND SERVICE HANDBOOK page 23/71 Figure 3 C35E-4.5 capacity at 1,000 m /hour Figure 4 C35E-5.1 capacity at 1,000 m /hour...
  • Page 24 COTES C35 OPERATING AND SERVICE HANDBOOK page 24/71 Figure 5 C35E-5.6 capacity at 1,000 m /hour Figure 6 C35D-3.2 capacity at 405 m /hour...
  • Page 25 COTES C35 OPERATING AND SERVICE HANDBOOK page 25/71 Figure 7 C35D-4.5 capacity at 617 m /hour...

  • Page 26: Assemblies And Components

    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.
  • Page 27 COTES C35 OPERATING AND SERVICE HANDBOOK page 27/71 Spare parts C35E/C35D/C35C dehumidifier...
  • Page 28 COTES C35 OPERATING AND SERVICE HANDBOOK page 28/71 Table 3: Spare parts list C35E/C35D/C35C C35E C35D C35C Type Part Process air fan 624828 801667 801667 801667 801667 624828 801667 624828 801667 Regeneration air fan 624890 624890 624890 624890 624890 624890...
  • Page 29 COTES C35 OPERATING AND SERVICE HANDBOOK page 29/71 Heaters 111503 111503 111503 111504 111506 111503 111504 111503 111504 111504 (6pcs) (3pcs) (3pcs) (6pcs) (6pcs) (6pcs) (6pcs) (6pcs) (3+3pcs) Configurations - B & C & D Humidity sensor 140639 (not shown)

  • Page 30: Sound Levels

    Sound levels for each particular dehumidifier can be found on page 19. Measuring sound levels Sound levels for Cotes dehumidifiers are measured in accordance with the provisions of the ISO11201 standard. While the sound level is being measured, the dehumidifier is placed on the floor. Ducts for regeneration air and for incoming air/outgoing air are installed and led out of the measuring room.

  • Page 31: Section 4 / Installation

    Handling Cotes dehumidifiers are built to be very robust, so there is no need for special handling, apart from normal sensible care and attention. Note the weight of the dehumidifier as specified on page 21. We recommend that you use a forklift to move the dehumidifier around and place it in position.
  • Page 32 COTES C35 OPERATING AND SERVICE HANDBOOK page 32/71 Things to be careful about Electrical work should only be carried out by an authorised electrician. NOTE Electrical work should only be carried out by an authorised electrician. Connections needed – electrical First, make sure that the main switch is OFF.
  • Page 33 COTES C35 OPERATING AND SERVICE HANDBOOK page 33/71 In Configuration-C and Configuration-D, the process air fan is equipped with a frequency converter, which makes dampers on the process air side unnecessary. The regeneration air should be led to and taken from the outdoors.
  • Page 34 The regeneration air inlet and outlet must be placed with sufficient distance to each other to avoid rebreathing. If possible, Cotes recommends placing the regeneration inlet and outlet on each side of a corner – or some similar location – to reduce the risk further. If nothing is done to prevent the regeneration air from "short-circuiting", a capacity loss is possible and the risk of condensation inside...

  • Page 35: Additional Information For A C35C Dehumidifier (Cold Store Model)

    COTES C35 OPERATING AND SERVICE HANDBOOK page 35/71 Safety precautions Dehumidifiers in the C35 range weigh approximately 102–115 kg and should therefore only be moved using a forklift or similar equipment Any work in the electrical box should only be carried out by authorised electricians.
  • Page 36 COTES C35 OPERATING AND SERVICE HANDBOOK page 36/71 Connections needed – ductwork The regeneration air must be led to and taken from the outdoors. The ductwork must always be insulated from and to the cold storage. Such insulation is not included when purchasing a C35C dehumidifier.

  • Page 37: How To Commission This Dehumidifier

    COTES C35 OPERATING AND SERVICE HANDBOOK page 37/71 HOW TO COMMISSION THIS DEHUMIDIFIER NOTE Only trained/authorised electricians are allowed to carry out any work required in the electrical box of this Cotes dehumidifier. When the cover of the electrical box is open, the power supply must be switched off at the mains switch.
  • Page 38 10–15% higher than the nominal value, due to the lower density of warm air. If a Cotes HR or LK module is installed, go to SECTION 7 / Condensation or heat recovery unit. Configuration-A •...
  • Page 39 (>30°C), the aim should be a temperature increase of less than 95°C. The temperature increase can be reduced by increasing the regeneration flow rate. If this temperature is too high, please consult Cotes or your local dealer. Configuration-C and Configuration-D: •...

  • Page 40: Section 5 / Operation

    COTES C35 OPERATING AND SERVICE HANDBOOK page 40/71 SECTION 5 / OPERATION HOW TO OPERATE WITH BASIC-PLR BASED DEHUMIDIFIER Configuration-Basic PLR is designed for maximum dehumidification, and the standard setting is that it is kept running at all times. This configuration is kept as simple as possible, which is why there is no dehumidification management installed.
  • Page 41 EXTERNAL HUMIDITY MANAGEMENT You can purchase an external humidity hygrostat to manage when the dehumidifier is operating or not. Contact Cotes or your Cotes dealer for more information. HMI PANEL HMI panel is mounted into main PLR module inside electrical cabinet.
  • Page 42 42/71 CONSTANT PROCESS FLOW FEATURE Cotes dehumidifiers provide a constant process air flow (CPF) mode. This means the process fan is always on, regardless of humidity levels. To activate this constant process air flow mode, you stop the dehumidifier with the start/stop button on the front panel, then press the “0”...
  • Page 43 COTES C35 OPERATING AND SERVICE HANDBOOK page 43/71 To change current date press “1” and to change current time press “2”. Enter the correct date values in the order: day/month/year. To “jump” from dd to mm to yy, press the “right arrow” next to the “OK”...

  • Page 44: How To Operate With Plc Based Dehumidifier

    COTES C35 OPERATING AND SERVICE HANDBOOK page 44/71 HOW TO OPERATE WITH PLC BASED DEHUMIDIFIER The dehumidifier needs to be turned on at the main switch. After a while the PLC overview screen will appear. Overview menu Actual measurement and target value for % relative humidity and temperature – within the space concerned (as registered by external sensors that are not part of the dehumidifier).
  • Page 45 COTES C35 OPERATING AND SERVICE HANDBOOK page 45/71 State of the regeneration air filter – if this is yellow, the filter should be replaced soon. If this is red, the service interval has been exceeded. A mechanical pressure switch triggers a warning (yellow alarm) if the set point is reached.
  • Page 46 COTES C35 OPERATING AND SERVICE HANDBOOK page 46/71 MAIN menu START/STOP Turn the dehumidifier on and off. HUMIDITY Setup target for relative humidity and/or dew point. PROGRAMS This is where you decide how you want the dehumidifier to operate: •...
  • Page 47 47/71 First setup of PLC dehumidifier The basic programs for Cotes dehumidifiers are ALWAYS ON and RH ON/OFF. You should choose the program best suited to your needs. The ALWAYS ON program is the simplest – it runs the dehumidifier at full capacity all the time.

  • Page 48: Section 6 / Service And Repair

    HOW TO SERVICE AND REPAIR THIS DEHUMIDIFIER Service and maintenance work on this dehumidifier Cotes designs its dehumidifier units so that they are as robust as possible, and only need a minimum of service and maintenance. None of the components require lubrication or adjustment.
  • Page 49 You should never just turn off the power to the dehumidifier while it is running. The correct procedure is to press STOP C35 DEHUMIDIFIER (Configuration-A; press the operating button), after which the machine runs a cooling cycle before the regeneration air fan stops. Turning off the dehumidifier properly prevents any over-heating.
  • Page 50 Connecting 230V motors All C35 dehumidifiers are fitted with 230V AC electric motors for the fans. This means it doesn’t matter how the plus/minus cables are connected. Nevertheless, the gear motor must be connected correctly and you must check that the rotor turns...
  • Page 51 COTES C35 OPERATING AND SERVICE HANDBOOK page 51/71 Replacing filters Use only high-temperature resistance filters for the regeneration air flow. (Except if special filters are specified). The following is standard procedure for replacing the filters: • Open front door •...
  • Page 52 COTES C35 OPERATING AND SERVICE HANDBOOK page 52/71 Replacing fans The following is standard procedure for replacing the process air fan; • Remove top cover • Disconnect cables for process air fan • Remove the screws on the fan bracket •...
  • Page 53 COTES C35 OPERATING AND SERVICE HANDBOOK page 53/71 Replacing PLC The following is standard procedure for replacing the PLC unit. Remove the top cover Disconnect cables for the PLC Remove the screws for the PLC bracket Replace the PLC Replacing electrical board The following is standard procedure for replacing an electrical board •...
  • Page 54 COTES C35 OPERATING AND SERVICE HANDBOOK page 54/71 Replacing gear motor The gear motor is installed/assembled on a bracket for easy removal and installation, because the combined assembly is extracted from the cabinet together. To remove the gear motor, the belt must first be loosened.
  • Page 55 COTES C35 OPERATING AND SERVICE HANDBOOK page 55/71 Replacing rotor, rotor gaskets and shaft You do not need to remove the rotor to replace the rotor gaskets. You simply place the new gasket on the rotor and fix it in place with the three-part expansion ring. You then turn the rotor, which presses the gasket against the departing plates until only half of the gasket is on the rotor.
  • Page 56 COTES C35 OPERATING AND SERVICE HANDBOOK page 56/71 The following is standard procedure for replacing the rotor: • Open door at the front of the cabinet. • Remove the bolt/nut in front of the gear motor, to allow loosening of the drive belt (see the picture in the “Replacing gear motor”...
  • Page 57 Temperature in heating box was menu displays higher than 176°C “Overheating Alarm” Check whether the regeneration air flow is too low Check whether the filters should be changed If you have any queries or questions, please contact your Cotes dealer.

  • Page 58: Section 7 / Condensation Or Heat Recovery Unit

    Note that the energy consumption of a Cotes dehumidifier in BASIC configuration will remain the same with a HR module. However, the running time will fall due to the increased capacity when using a HR module without modulating heat.

  • Page 59: Specifications, Assemblies And Components

    COTES C35 OPERATING AND SERVICE HANDBOOK page 59/71 SPECIFICATIONS, ASSEMBLIES AND COMPONENTS Please note that specifications and controls given in this handbook are in some situations approximate. Table 4 Technical data C35LK Type Nominal power consumption 0.17 Voltage 1x230 Frequency...
  • Page 60 COTES C35 OPERATING AND SERVICE HANDBOOK page 60/71 Dimensions Condensation module Heat recovery module...
  • Page 61 COTES C35 OPERATING AND SERVICE HANDBOOK page 61/71 Spare parts Condensation module CONDENSATION UNIT Condensation air filter 130268 Condensation fan 801715 Heat recovery module HEAT RECOVERY UNUT Regeneration air filter 130268...

  • Page 62: How To Install A Condensation Unit Or Heat Recovery Unit

    Please dispose of this packaging responsible, and recycle it if possible. Handling Cotes condensation units and heat recovery units are built to be very robust, so there is no need for special handling, apart from normal sensible care and attention.
  • Page 63 We recommend keeping some free space below the module to make sure it is easy to install drain hose(s) and an air-lock. An additional floor or wall bracket can be provided to make sure there is enough space. For details, please contact your Cotes dealer, or Cotes. NOTE Before the machine is started, the ‘air-lock’...
  • Page 64 The C35 Configuration-A has no built-in regeneration fan adjustment and cannot control the regeneration air fan speed, which is needed when installing the condensation unit. A Reg Air Fan Kit is therefore available for the C35 Configuration-A to make it possible to control the regeneration air fan using a potentiometer.

  • Page 65: How To Adjust The Air Flow With The Hr Module

    Check the temperature after the heating elements. The temperature in the regeneration system is shown on the PLC display on the front of the dehumidifier. Make sure the C35 dehumidifier and HR module are fully heated before you take readings.
  • Page 66 COTES C35 OPERATING AND SERVICE HANDBOOK page 66/71 increase can be limited by increasing the regeneration flow rate. If the temperature is too high, please consult Cotes or your local dealer. Configuration-C and Configuration-D: • In the Configuration-C and Configuration-D, the dehumidifier is self-adjusting, and adjusts...

  • Page 67: Section 8 / Formalities And General/Legal Info

    AND GENERAL/LEGAL INFO WARRANTIES Warranty conditions The Cotes factory warranty is only valid if a documented programme of service and preventive maintenance has been carried out. Maintenance must have been carried out at intervals of six months or less. Documentation for this must be in the form of a written log/journal, with attested entries.

  • Page 68: Legal Notices

    The information contained in this publication and the products and equipment described herein are subject to change at any time without prior notice. Cotes A/S has no obligation to inform buyers of the products and equipment of such subsequent changes.
  • Page 69 8000 Aarhus C www.cotes.com info@cotes.com VAT no. DK 15 20 03 32 Declares at its own liability that the following models of Cotes adsorption dehumidifiers: C30, C35, C65, C105 covered by this declaration complying with the following directives: Machinery Directive 2006/42/EC...
  • Page 70 Extra insulation The doors of the Cotes dehumidifier can be insulated to ensure that the sound pressure level of the unit is reduced and to ensure that all energy (both cooling and heating) is kept inside the unit.
  • Page 71 COTES C35 OPERATING AND SERVICE HANDBOOK page 71/71 WHOM TO CONTACT Help when and where you need it Contact Cotes in Denmark or your local dealer: Cotes contact information: Cotes A/S Mariane Thomsens Gade 2f, 11. 8000 Aarhus C Denmark +45 5819 6322 info@cotes.com...

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