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Clean Air Optima CA-904B Manual

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7. 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 eected 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°C, the display shows “LO”;
When the temperature is >40°C, 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 o; the low/high heating power light will be o, and the fan will switch o
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).
8. Memory last setting: when switching on the device, the last settings will be activated.
9. After the device has been in operation for 1 minute, the display light of the keys will dim.
10. NTC over-heating protection function:
At temperatures higher than 55°C, the device will switch itself o. 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 o again. After 12 hours
of operation with no change in settings, the device will switch itself o.
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.
… 10 …


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