Specifications

Main Functions SiBE04-624
18 Function and Control
• “Humid heating” by URURU / SARARA
This air conditioner enables uniformly humidifying the room by circulating vapor with warm
air.
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Powerful humidifying ability
The humidifying capacity is 450 ml/h (5.0 kW class) and equivalent to that of a normal
humidifier.
The values above are measured at 7°C DB / 6°C WB of outdoor air and with 7.5 m of
humidifying hose length.
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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.
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Humidity control
The FTXR-E series model performs the humidifying operation, targeting the humidity level of
40 to 50%.
(You can select the remote controller setting from Low, Standard, High and Continue. The
target humidity (%) cannot be set.)
Note
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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.
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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.
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In the humidifying operation, the operation sound increases by about 2 dB both in the indoor
and outdoor units. (When the air flow rate is in L or SL, the operation sound increases by
about 3 dB in the indoor unit.)
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This system does not suppose the storage of musical instruments or the like.
Conditions for
Humidifying
Operation
While heating mode, humidifying operation can be available when the following conditions 1~5
are met at the same time.
1. Indoor heat exchanger temperature is 12°C or more.
2. Outdoor temperature is from –10°C to 24°C (meanwhile, in test operation, up to 34°C is
possible). Humidifying operation does not work under –10°C.
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”
humidification is selected, humidifying operation has the priority.)
5. Room humidity is under 70%RH.
Note
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Exclude the case when it is recovered from thermostat-off or when the defrosting operation
finished.
Model FTXR28E FTXR42E FTXR50E
Humidifying Capacity 400ml/h 425ml/h 450ml/h
80
70
60
50
40
30
20
(R3326)
The room is uniformly humidified.