Vents VENTS TT Series, User Manual, Page: 11 / 28

11
EN
The fan functioning logic may be based on temperature or timer controls:
- temperature-based functioning (
model TT XXX U
) is used to keep air temperature to within 2 °C. In this
case the fan switches are rare. The fan switches to the maximum speed as the room air temperature exceeds
the set point.
As the air temperature drops down 2 °C below the temperature set point or if the initial temperature is below
the set point, the fan operates with the set speed.
- timer-based functioning (
model TT XXX U1
) is used for exact air temperature control. The speed switches
are more frequent as compared to the temperature-based functioning logic, but one speed interval continues
at least 5 minutes. As the indoor air temperature exceeds the set point, the fan switches to the maximum
speed. As the room air temperature drops down below the temperature set point, the timer starts 5 minutes
countdown and then the fan switches to the set lower speed.
If the initial air temperature is below the set point, the fan operates with the low speed from the start.
The
TT XXX P
fan is equipped with a speed controller that enables switching the fan on/off, smooth speed (air
flow) control from minimum to maximum value (Fig. 34).