The Cotes CR240 is an adsorption dehumidifier designed for dehumidifying and conditioning atmospheric air. It operates on the principle of two air flows: process air and regeneration air, controlled by a single fan. The incoming moist air is filtered by a G4 filter and then passes through a slowly turning rotor coated with desiccant silica crystals. These crystals adsorb water molecules, reducing the humidity of the air. The adsorption process releases energy, increasing the air temperature. The air is then split into two separate airflows: process air (dry air) and regeneration air. The regeneration air is heated by a heating element to reduce its relative humidity, evaporating the moisture previously adsorbed by the silica crystals in the rotor. This water vapor then exits the dehumidifier in the outgoing regeneration air. This continuous process of simultaneous water adsorption and extraction ensures automatic dehumidification.
Important Technical Specifications:
The CR240 is designed for maximum dehumidification and is connected to a 230V, 1PH+N+PE power supply. It comes with a built-in socket for different cable lengths and a plug for power supply.
- Airflow:
- Dry air, free blowing: 300 m³/hour
- Dry air, nominal: 240 m³/hour
- Regeneration air, nominal: 40 m³/hour
- External Pressure:
- Dry air, nominal: 75 Pa
- Regeneration air, nominal: 150 Pa
- Capacity: At 20°C, 60% RH: 19.2 Kg/24h
- Power Consumption:
- Nominal: 1.04 kW
- Maximum, free blowing: 1.3 kW / (5.7 A)
- Voltage/Phases: 220-230V / 1PH+N+PE
- Internal Thermal Fuse: 84°C
- External Fuse in Connected Installation: Minimum 10 A / Maximum 16 A
- Type of Distribution System: TN-S
- IP Rating (With both outlet ducts connected): IP33
- Dimensions (W x D x H):
- Cabinet: 444 x 382 x 374 mm
- Total: 450 x 382 x 374 mm
- Process and Regeneration Air Inlet: 202x208 mm
- Process Air Outlet (Female): Ø125 mm
- Regeneration Air Outlet (Female): Ø80 mm
- Weight (without power cable): 10 kg
- Sound Level (Nominal free blowing / Max. free blowing) @ 1 meter: 59 / 67 dB(A)
Usage Features:
The dehumidifier is intended for use in residential, commercial, and industrial environments. It must be placed horizontally on the floor or a table, resting on its four rubber supports. It should be installed indoors in stationary installations and protected against rain and water. A minimum distance of 10 cm to other structures is recommended. The unit is designed for operation up to 3000 meters above sea level.
The control panel includes:
- Power cable connector
- Hygrostat connector (for external regulation, e.g., Cotes DR10)
- Hour counter
- Potentiometer (Fan adjustment)
- Program selector switch
The selector switch has four positions:
- Man: Manual, continuous operation.
- 0: Switched off.
- Auto: Automatic operation with a connected hygrostat.
- Auto + Fan: Automatic operation with a connected hygrostat, with the fan always on.
The dehumidifier is designed for continuous operation as its standard setting, aiming for maximum dehumidification without complex management. Frequent switching on/off of the selector switch should be avoided to prevent damage to the contact element or connected hygrostat.
For optimal performance, duct connections should be carried out by authorized ventilation installers. The regeneration air outlet duct should be directed downwards to allow for condensed water drainage; if not possible, a Ø6mm hole should be drilled in the lowest part of the duct. An optional damper can be installed on the dry air outlet duct for adjusting dry air flow, and a damper must be installed on the regeneration air outlet to adjust its airflow. The regeneration air flow should be adjusted until the Ammeter indicates 4.5A (at 230V).
Maintenance Features:
Cotes dehumidifiers are designed for robustness and minimal service. No components require lubrication or adjustment.
Safety First: Before opening the dehumidifier, ensure the electric power is switched off at the main switch or by pulling the plug to avoid electric shock. Be aware that the heater element may be hot immediately after shutdown.
Routine Maintenance:
- Air Filter Replacement: Access the filter by tipping the finger tab to the right and removing the filter lid. The filter can be replaced without turning off the dehumidifier, but it is easier when off. The replacement filter (no. 650009) fits into the filter lid.
- Rotor Rotation Check: Ensure the rotor is turning during operation.
- Electric Heater Power Consumption Check: Verify the power consumption is approximately 4.5A on the Ammeter during operation.
Annual Checks (or more frequently if needed):
- Check or replace the air filter.
- Verify that the fans are working (by listening).
- Check the working hours of internal components against the time-to-change limits (e.g., air fan: 30,000 hours, gearmotor for rotor: 25,000 hours, electrical heaters: 50,000 hours, drive belt for rotor: 25,000 hours, rotor: 50,000 hours).
- Calibrate or replace the external humidity sensor.
- Inspect the cabinet for dirt or corrosion.
- Check the drive belt for tightness and wear.
- Inspect all electrical cables for intact insulation and proper attachment.
- Test all electrical components as per commissioning instructions.
Component Replacement (requires professional assistance):
- Air Fan Replacement: Disconnect electrical connectors, unscrew securing screws (4 pcs inside the air filter box), remove the filter cover, and detach the fan section from the bottom shell.
- Rotor, Drive Belt, Gearmotor, and Electrical Heater Replacement: Disconnect the flexible hose, ground connection, power, selector, potentiometer, and fan connectors. Lift the complete rotor section onto a flat horizontal surface for access.
Reassembly involves reversing the steps, ensuring sheet metal is correctly fitted and no unnecessary force is used. The "Air trap foil" inside the bottom shell should not be grabbed when refitting the lid.
The dehumidifier automatically restarts in case of power loss and subsequent electricity recovery.
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