SiMT041311E
Main Functions
Function and Control
22
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 trial operation, up to 34°C is
possible). Humidifying operation does not work under –10°C.
3. Approximately 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
Exclude the case when it is recovered from thermostat-off or when the defrost operation
finished.
How to Check the
Motion of
Humidifying
Operation
You can check whether the humidifier unit is in good working order. If you conduct humidifying
trial operation, you can check even beyond the range of the normal conditions for humidifying
operation.
1. Hygroscopic fan ................................Check if air is exhaled from the front outlet of the
humidifier unit.
2. Humidifying fan / heater / damper .....Check if warm air is blown from the duct of outdoor
unit.
3. Humidifying rotor ...............................Check if the rotor is rotating with the top panel off.
As for the performance, estimate from psychrometric chart with the measured temperature and
humidity of the outdoor air and of the humidified air (in front of the indoor outlet) using thermal
hygrometer.
