CA-904C - Heating Clean Air Optima - Free user manual and instructions
Find the device manual for free CA-904C Clean Air Optima in PDF.
| Product type | Design supplementary heater |
| Brand | Clean Air Optima |
| Model | CA-904C Smart |
| Dimensions | 688 x 210 x 210 mm |
| Weight | 4.56 kg |
| Power supply | 220-240 V, 50 Hz |
| Rated power | 2000 W |
| Minimum heating power | 1000 W |
| Maximum heating power | 2000 W |
| Digital temperature control | 15°C to 35°C |
| Heating element type | PTC ceramic |
| Functions | Timer (1-12 h), 80° oscillation, infrared remote control, WiFi connectivity, mobile app |
| Noise level | < 35 dB(A) (low power) |
| Safety | Anti-tip protection, dual overheat protection, automatic shut-off after 12 h, NTC protection |
| Color | Light brown |
| Recommended area | Up to 40 m² / 100 m³ |
| Warranty | 2 years |
| Connectivity | WiFi 2.4 GHz (compatible with iOS and Android) |
| Maintenance and cleaning | Unplug and let cool before cleaning. Use a soft cloth with a neutral cleaner diluted in hot water (< 50°C). Do not use aggressive products. |
| Spare parts and repairability | Repairs only by authorized technician. Do not disassemble yourself. |
| General information | Manual available in multiple languages on the manufacturer's website. |
Frequently Asked Questions - CA-904C Clean Air Optima
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USER MANUAL CA-904C Clean Air Optima
Design Fan Heater Clean Air Optima® CA-904C Smart
User manual
Find more languages on:
www.cleanairoptima.com/info/manuals
Read these instructions carefully before you start using the Design Fan Heater and keep the manual for future reference.
This product is only suitable for well insulated spaces or occasional use.
This product is not suitable for use as primary heating.
© Copyright: Clean Air Optima®
Clean Air Optima®
Table of contents Page
| English | 3 | |
| German | 17 | |
| Dutch | 31 | |
| French | 45 | |
| Spanish | 59 | |
| Polish | 73 | |
| Czech | 87 | |
| Romanian | 101 | |
| Lithuanian | 115 |
English
Thank you for purchasing the Clean Air Optima® Design Fan Heater CA-904C Smart. We wish you many years of healthy indoor air with this efficient and effective product. This product is only suitable for well insulated spaces or occasional use. This product is not suitable for use as primary heating.
These instructions describe the safety precautions to be observed during operation. They are meant to prevent injuries and to avoid damaging the device.
CA-904C Smart / Main unit

13. Control panel 14. Display panel

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Top-down schematic of a circular device with labeled buttons and indicators (no text or symbols beyond basic diagram lines)
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sunny sun °C h uDescription of the device
The device consists of the following main components:
- Remote control signal receiver
- Air outlet
- Front cover
- Base
- Filter cover
- Filter
- Top cover
- Control panel
- Decoration display ring
- Power cord
- Power switch
- Remote control holder
- Control panel
- Display panel
- Remote control

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Pure electrical control buttons without any text or symbolsSafety warnings
This device may only be used in accordance with these safety instructions. Take the following steps to minimize the risk of personal injury caused by for example electric shocks or fire.
- Only for indoor use. Do not use or store outdoors.
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This device can be used by children aged from 8 years and above and persons with reduced physical, sensory or mental capabilities or lack of experience and knowledge if they have been given supervision or instruction concerning use of the device in a safe way and understand the hazards involved. Children shall not play with the device. Cleaning and user maintenance shall not be made by children without supervision.
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Children should be kept away unless continuously supervised.
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CAUTION — Some parts of this product can become very hot and can cause burns.
Particular attention has to be given when children and vulnerable people are present.

Warning: in order to avoid overheating, do not cover the heater.
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The heater must not be placed immediately below a socket-outlet.
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Do not use the device when there is visible damage on the electrical cord or on the device itself. Do not repair the device yourself in case of damage. Never pull the device by its cord. If the power cord is damaged, then it must be replaced by an authorized service person to prevent electric shock or fire.
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Repairs may only be performed by authorized service personal. Do not try to repair the device yourself to prevent electric shock or fire.
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Always remove the plug from the socket when the device is not being used or when you clean internal or external parts of it.
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Only use power cords provided.
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To safely use the device, put it in a steady, horizontal position. Do not move while using.
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Do not use the device in rooms where inflammable liquids or gases are stored, close to heat sources or in particularly humid rooms like the bathroom, shower or swimming pool.
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To prevent malfunctions, never insert strange objects into the device.
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Never cover the air inlet and air outlet grid.
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Never dissemble or replace the device's inner parts.
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To prevent injury or damage to the heater, do not touch the air inlet and outlet grille while the device is running and do not insert the handle or any other object into the air outlet.
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Do not put heavy objects on the unit.
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Do not place the device in direct sunlight, to avoid that the device discolours.
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Never immerse the unit in water or other liquids.
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Do not touch the power cord with wet hands.
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Do not point the air outlet directly at a baby for a long time.
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Do not place the device close to walls, curtains or other combustible materials, it may cause a fire.
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When there is a unusual smell or unusual sound coming from the device, unplug the device from the power socket right away.
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Do not use this heater if it has been dropped.
Clean Air Optima®
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Do not use if there are visible signs of damage to the heater.
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Use this heater on a horizontal and stable surface.
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WARNING: Do not use this heater in small rooms when they are occupied by persons not capable of leaving the room on their own, unless constant supervision is provided.
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This appliance can be used by children aged from 8 years and above and persons with reduced physical, sensory or mental capabilities or lack of experience and knowledge if they have been given supervision or instruction concerning use of the device in a safe way and understand the hazards involved. Children shall not play with the device.
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Cleaning and user maintenance shall not be made by children without supervision.
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Children of less than 3 years should be kept away unless continuously supervised.
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Children aged from 3 years and less than 8 years shall only switch on/off the device provided that it has been placed or installed in its intended normal operating position and they have been given supervision or instruction concerning use of the device in a safe way and understand the hazards involved. Children aged from 3 years and less than 8 years shall not plug in, regulate and clean the device or perform user maintenance.
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WARNING: To reduce the risk of fire, keep textiles, curtains, or any other flammable material a minimum distance of 1 m from the air outlet.
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Do not ingest the battery, the battery is a Chemical Burn Hazard.
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This device contains a coin / button cell battery. If the coin / button cell battery is swallowed, it can cause severe internal burns in just 2 hours and can lead to serious complaints or decease.
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Keep new and used batteries away from children.
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If the battery compartment does not close securely, stop using the device and keep it away from children.
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If you think batteries might have been swallowed or placed inside any part of the body, seek immediate medical attention.
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The batteries contain materials, which are hazardous to the environment, they must be removed from the device before it is scrapped and that they are disposed safely.
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Use, maintain and clean the device as described in this manual.
Product Features
- Equipped with PTC ceramic heating element: this ensures that the air flow is automatically adjusted to the room temperature.
- Adjustable Air flow and temperature:
Airflow: low - high
Temperature: cool - warm
- Timer function (1-12h)
- Digital temperature control from 15°C to 35°C
- Equipped with a Cross flow fan for silent operation
- Tip-over safety protection, double over-heating protection
- With Infrared long distance remote control function
- Wide angel swing function
- Automatic air supply, gentle breeze, smooth heating.
Installation and Operation instruction
The package contains: Main device (the base cannot be removed), remote control and instruction manual.
Assembling the device
- Take out the device from the package.
- Carefully put the device on a stable surface in upright position.
- The device needs to be positioned at least 30 cm from walls and furniture.
Function of keys
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Plug in the device: press the power button on the back (bottom), a power-on sound will sound to enter standby mode, the digital display will show"——".
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Press the Ⓞ key, the device starts working. Press it again, the device turns off.
The default situation after switching on:
a) PTC: Low heating power, icon lights up.
b) Swing: Swing off, the 🤘 icon is off.
c) Timer: Oh(= no timer is set), the "h" icon is off.
d) Room temperature LED display " ____ " lights up.
e) Fan switches on.
f) Temperature setting: default is set to 25^ C
Clean Air Optima®
- In operating condition, press the key to shift PTC from low heating power to high heating power. By pressing the key again, the PTC will switch back to low heating power.
a) If working at low heating power: the low heating power icon lights up (the high heating power icon is off).
b) If working at high heating power: the high heating power icon lights up. (high heating starts after 10 seconds).
- In operating condition, press the √ key to shift from low fan power to high fan power. By pressing the key again, the fan switches back to low power.
a) When working at low fan speed: the low fan power icon lights up.
b) When working at high fan speed: the high fan power icon lights up.
- In operating mode, you can press the ⬤ key to make the device oscillate or not.
a) Press the Swing key: the device will oscillate, the 🤒 icon lights up.
b) Press the Swing key again: the device will stop oscillating, the 🤒 icon will be off.
Note: In warm airflow mode the PTC stops working when the room temperature is higher than the set temperature. The fan stops working after 10 seconds. During that time, the swing function is not available.
- In operating condition, press the ⏻ key to set the timer.
a) Go to the timer setting mode, press the ⏻ key, the LED time icon lights up and blinks every 0.5 seconds. During this time-frame, press the ⚙ or the ⚡ key to set the timer (0-12 hours), with each key press the time will be added by 1 hour.
By pressing and holding the ⬤ or ⬤, the time can be set faster.
b) If no keys are pressed within 5 seconds (except for ⬤ and ⬤, the LED indicator will show the room temperature.
c) Press the timer key to see the set time. If the value shows a number except for -0-, the timer will start timing (not shown), if the timer reaches value -0-, then the device will turn off at once.
d) If the value shows -O- in timer setting, then this means no time is set, the time icon will be off, the LED display will show the current room temperature.
- a) Press the ⚡ key, to change the temperature by pressing the ⬤ or ⏰ keys. The temperature range is from 15°C \~ 35°C, the temperature will change by 1°C by every key press.
b) By pressing the ⚡ key again or if no key is pressed within 5 seconds, the temperature that you have set will be effected at once.
c) If no keys are pressed within 5 seconds (except for or the LED indicator will show the room temperature. When the temperature is ≤ -10^ , the display shows “LO”; When the temperature is >40^ , the display shows “HI”.
d) After switching on the device, it will start measuring the temperature within 10 seconds. If the ambient temperature is higher than the set temperature then the PTC heating function will turn off; the low/high heating power light will be off, and the fan will switch off after 10 seconds. The swing function will also stop, if you have set it before. All the other icons will not change. If the ambient temperature falls below 1^ C of the set temperature, the heating function will switches on again, as well as the fan & the swing function (if set before). The other icons will be on.
e) If both timer and room temperature are set, the values are alternately shown on the display (at an interval of 30 seconds).
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Memory last setting: when switching on the device, the last settings will be activated.
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After the device has been in operation for 1 minute, the display light of the keys will dim.
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NTC over-heating protection function: At temperatures higher than 55^ C, the device will switch itself off. If the ambient temperature drops below 45^ C, the device can be switched on again manually. If the temperature raises above 45^ C again, the device will switch off again. After 12 hours of operation with no change in settings, the device will switch itself off.
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WIFI Function: When the device is on, press and hold the WIFI button for 5 seconds till it beeps once. The WiFi indicator will flash quickly after 5 seconds, and you can configure the network in the default mode of the App. If it is not connected within 3 minutes, the WiFi indicator will turn off. To connect again, you need to press and hold the WIFI button for 5 seconds till it beeps once to reset the WiFi module, the WiFi indicator will flash quickly and you can restart to configure the network in the default mode.
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In the process of accessing network, if the network is not matched within 3 minutes, the WiFi indicator will go off. You need to press and hold the WIFI button for 5 seconds to restart it.
Clean Air Optima®
Remote control
- Open the battery cover at the back side of remote control to place the battery. (see Picture 1).
- To place the battery: there is a "security tab" at the bottom of the remote control that you first have to slide to the right and then pull out the battery holder. (see Picture 2). Insert the battery with the correct polarity. (see Picture 3).
- Push the battery cover back into the remote control.

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Remote control Battery cover (Picture 1) (Picture 2) (Picture 3) Battery (CR2032)Cleaning & Maintenance
Unplug the heater before each maintenance and make sure the heater has cooled down. If necessary you can use a soft cloth with a neutral cleaning product dissolved in warm water (below 50°C) to clean the outer side of the fan. Dry carefully.
To avoid damaging the device, do not use aggressive cleaning agents to clean the surface of the heater.
To store the heater, place it in a dry and ventilated place.
Operation with Clean Air Optima® App
Connectivity
Compatibility with smartphone and tablet:
iPhone, iPad and Android devices
Device connets via WiFi with App:
CleanAirOptima
Attention: The router must be set to the 2.4 GHz broadband. If the router is set to the 5.0 GHz, it is impossible to establish a connection.
Set up WiFi connection
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Download and install the "CleanAirOptima" App in the App Store or Google Play Store.
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Make an account and log in.
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The router must be set to the 2.4 GHz broadband. If the router is set to the 5.0 GHz, no connection can be established.
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Make sure Bluetooth is enabled on your smartphone.
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Plug the device into the power socket and switch it on. The WiFi indicator will blink. If the WiFi light does not blink, press the 'WIFI' button for 5 seconds. Then the WIFI light will flash quickly. If the WIFI light blinks quickly, the device is ready to connect.
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Make sure that your smartphone or tablet is successfully connected to your WiFi network.
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Open the 'CleanAirOptima' App and click on 'Add device'. Your device is listed and you can select it. If not choose 'Auto Scan', Follow the on-screen instructions to connect the device to your network.
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Choose to add the Clean Air Optima ^® device on the App, follow the instructions in the App.
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When the device is paired, the WiFi indicator light stays on constantly.
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After the configuration is successful, you can use the Clean Air Optima® App to operate the device.
Note:
- If your default network has changed, reset the WiFi connection, follow step 1 to 9 in the 'Set up WiFi connection' section.
- If you want to pair multiple devices to your smartphone or tablet, you have to do this one after the other.
- Make sure that the distance between your smartphone or tablet and the device is less than 5 meters and there are no obstacles. Also make sure you are in the same room as the device.
Reset the WiFi function:
- Reset the WiFi by pressing the 'WIFI' button for 5 seconds, the indicator light of the WiFi will blink rapidly.

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Clean Air cycles® A guarantees for healthy indoor air quality! WIFI GET IT ON Google Play Download on the App StoreClean Air Optima®
Connect devices to multiple phones
Note: First the other person needs to install the Clean Air Optima® App on his/her phone and create a new account.
Share the device with limited access:
You can choose to share 1 device with several persons.
This person will then have access, but will not be able to manage all the settings.
Follow the instructions below to share the device with several persons:
- Go to the relevant device.
- Go to the pencil or three dots in the top right.
- Select 'Share device.'
- Choose 'Add sharing'.
- Choose the sharing method e.g. via email, whatsapp, sms etc. and continue.
- The device will automatically appear in the Clean Air Optima® App with the other account.
Share device with full access:
You can add a person or several persons to your home management.
That person will then have access to all your devices that are already linked and has full rights and permissions. You will always remain the main administrator.
Follow the instructions below to add someone to your home management:
- Open the Clean Air Optima® App and go to 'Me'.
- Then choose 'Home Management'.
- Choose 'Create a home'.
- Select the relevant 'Home' and 'Add member'.
- Choose the sharing method e.g. via email, whatsapp, sms etc. and continue.
- The corresponding 'Home' will automatically appear in the Clean Air Optima® App of the person with whom you have shared your 'Home'.
- On the other account: Go to the home screen from the Clean Air Optima® App. Go to the top left and select the 'Home'.
Information requirement for the electric local space heaters
| Model identifier: CA-904C Smart | |||||
| Item Symbol | Value Unit | Item Unit | |||
| Heat output Type of heat input, for electric | storage local space heaters only (select one) | ||||
| Nominal heat output | Pnom | 2.0 | kW | Manual heat charge control, with integrated thermostat | No |
| Minimum heat output (indicative) | Pmin | 1.0 | kW | Manual heat charge control with room and/or outdoor temperature feedback | No |
| Maximum continuous heat output | Pmax,c | 2.0 | kW | Electronic heat charge control with room and/or outdoor temperature feedback | No |
| Power consumption | Fan assisted heat output | No | |||
| In off mode | Po | 0.00 | W | Type of heat output/room temperature control (select one) | |
| In standby mode | Psm | 0.3 | W | Single stage heat output and no room temperature control | No |
| In idle mode | Pidle | 0.33 | W | Two or more manual stages, no room temperature control | No |
| In network stand-by | Pnsm | N/A | W | With mechanic thermostat room temperature control | No |
| Standby mode with display information or status | No | With electronic room temperature control | Yes | ||
| Seasonal space heating energy efficiency in active model | ηs,on | 91.5 % | Electronic room temperature control plus day timer | No | |
| Electronic room temperature control plus week timer | No | ||||
| Other control options (multiple selections possible) | |||||
| Room temperature control, with presence detection | No | ||||
| Room temperature control, with open window detection | No | ||||
| With distance control option | Yes | ||||
| With adaptive start control | No | ||||
| With operating time limit | Yes | ||||
| With black bulb sensor | No | ||||
| Contact details | Clean Air Optima International GmbH | ||||
Troubleshooting
The following is a troubling shooting guide to help you solve any issues that you may have using the Clean Air Optima® Design Fan Heater CA-904C Smart.
| Problem Possible Cause Solution | ||
| Device does not switch on | The power cord does not connect correctlyThe air inlet and outlet have a blockage | Connect the power plug and power socket correctlClean the blockage from the air inlet and outlet |
| Noise The device is installed askew | Make sure the device is installed uprightly | |
| Operation with Clean Air Optima® App does not work | Smartphone or tablet is not connected to WiFi networkThe device has no connection to the network | Switch off the device and reset the WiFi on the device by pressing the Mode button for 5 seconds, the indicator light of the WiFi will blink rapidly. Than follow step 4 to 8 from chapterOperation with Clean Air Optima® App |
Specifications
Model CA-904C Smart
For rooms up to 40m^2/100m^3/430ft^2
Rated voltage 220V - 240V, 50Hz
Rated power 1000W - 2000W
Nominal heat output 2000W
Minimum heat output 1000W
Maximum continuous heat output 2000W
Digital temperature control From 15°C to 35°C
Fan function Air velocity: up to 5 meter/second
Turning circle Oscillation: 80°
Sound level Silent fan < 35dB(A) Low
Dimensions 688 x 210 x 210mm
Weight 4,56kg
Colour Light brown
Carried standard EN/IEC 60035-1, EN/IEC 60335-2-30,
EN/IEC 60335-2-80
Complies with EU regulations CE/WEEE/RoHS
Ask your retailer or your municipality for updated information regarding the disposal of the packaging and of the device.


Service
Warranty Certificate for the Clean Air Optima® Design Fan Heater CA-904C Smart.
Date of purchase: ..... Customers name: ..... Address: ..... Telephone: ..... Email: ..... Seller's name: ..... Address: ....
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Please fill in completely this Warranty Certificate. Send it with the invoice and the unit, postage pre-paid and using the original packing box, to your distributor. Make sure to include the appropriate return postage for the package.
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Please enclose a short description of the damage, fault or malfunction, and the circumstances under which these problems arose.
The Clean Air Optima® Design Fan Heater CA-904C Smart is subjected to strict testing procedures before leaving the factory. If within 2 years from the date of purchase the product does not perform according to the specifications, because of factory defects, the purchaser is entitled to free repairs or replacement of parts upon presentation of this warranty (provided that the malfunction or damage to the device and/or parts occurred under normal operating conditions). What is covered: All parts defective in material and workmanship. For how long: two years from purchase date. What we will do: Repair or replace any defective parts.
Other Conditions
The provisions of this warranty are in lieu of any other written warranty whether express or implied, written or oral, including any warranty of merchantability or fitness for a particular purpose. The manufacturer's maximum liability shall not exceed the actual purchase price paid by you for the product. In no event shall the manufacturer be liable for special, incidental, consequential, or indirect damages. This warranty does not cover a defect that has resulted from improper or unreasonable use or maintenance, faulty assembly, accident, natural catastrophes, improper packing, or unauthorized tampering, alteration, or modification as determined solely by us. This warranty is void if the label bearing the serial number has been removed or defaced.
Thank you for reading!

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Design Fan Heater CA-904C Smart on:
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For frequently asked questions about the CA-904C Smart go to:
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Clean Air Optima International B.V. | David Ricardostraat 9-7 / 9-9 | 7559 SH Hengelo (ov)
The Netherlands | Phone: +31 (0) 74 - 2670145
Clean Air Optima Germany GmbH | Enschedestraße 14 | 48529 Nordhorn | Germany
Phone: +49 (0) 5921 879-121
E-mail: info@cleanairoptima.com
Internet: www.cleanairoptima.com
Deutsch
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