Daikin CTXU25G2V1B Service Manual page 13

Main Functions
Note
Conditions for While heating mode, humidifying operation can be available when the following conditions 1~5
Humidifying are met at the same time.
1. Indoor heat exchanger temperature is 12°C or more.
Operation
2. Outdoor temperature is from –10°C to 24°C (meanwhile, in test operation, up to 34°C is
3. Approx. 1 minute has already passed after heating operation startup. (See Note.)
4. Heating operation does not work to its full capacity. (Meanwhile, the "continuous"
5. Room humidity is under 70%RH.
Note
10
• HUMID HEAT operation by URURU
This air conditioner enables uniformly humidifying the room by circulating vapor with warm
air.
Powerful humidifying ability
The humidifying capacity is 450 ml/h and equivalent to that of a normal humidifier.
The value is measured at 7°C DB / 6°C WB of outdoor air and with 4.0 m of humidifying hose
length.
No need for water supply nor cleaning
Water supply and cleaning are unnecessary as it does not have water tank, unlike
humidifiers, and there is no proliferations of bacteria.
Humidity control
The target of the humidity level is 40 to 50%RH.
You can select from Low, STD (standard), Hi (high), and CONT (continuous). The target
humidity (%) cannot be set.
When the outdoor temperature and humidity are low, the humidifying capacity is decreased.
In addition, the moisture in the room may not attain sufficient humidity when the ventilation
volume is high, the preset temperature is high, or the preset humidity is HIGH.
After the "humid heating" operation starts, the relative humidity in the room lowers
temporarily. This phenomenon is caused by the increase of the saturation water vapor.
Therefore, the humidity raises gradually after the temperature reaches the preset
temperature.
In the humidifying operation, the operation sound increases by about 2 dB in the indoor unit
and 3 dB in the outdoor unit.
This system does not suppose the storage of musical instruments or the like.
possible). Humidifying operation does not work under –10°C.
humidification is selected, humidifying operation has the priority.)
Exclude the case when it is recovered from thermostat-off or when the defrosting operation
finished.
80
70
60
50
40
30
20
The room is uniformly humidified.
SiBE12-908
(R3326)
Function and Control