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Main Functions
SiBE12-933_A
62
Function and Control
Automatic
Airflow Control
for Heating
On heating mode, the indoor fan speed is regulated according to the indoor heat exchanger
temperature and the difference between the room temperature and the required set point.
Automatic
Airflow Control
for Cooling
The following drawing explains the principle of fan speed control for cooling (reference):
In case of ATX20-35G
(R4594)
fan speed
+1.5°C
+0.5°C
Thermostat
setting
temperature
DC motor: Rotation speed control
AC motor: Phase control
M
M
ML
ML
L
+2°C
+1°C
Difference between room
and set temperature
(R8433)
fan speed
+1.5°C
Thermostat
setting
temperature
Difference between room
and set temperature
+2°C
+1°C
M
ML
L
AC motor: Phase control
+0.5°C
+2.5°C
MH
+3°C