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EN
The TT XXX U/U1/U2(n) fan is equipped with an electronic TSC control unit (speed controller with electronic
thermostat) for automatic speed control (air flow control) depending on the air temperature (Fig. 21).
The terminal box cover incorporates 2 control knobs:
• for setting the fan speed;
• for setting the thermostat set point.
The thermostat LED light is located on the fan casing.
The thermostat LED glows as air temperature exceeds the set point.
To set the thermostat set point rotate the temperature control knob clockwise to increase or counter-clockwise
to decrease the temperature set point accordingly.
To set the fan speed (air flow) rotate the speed control knob in the same way.
The fan functioning logic may be based on temperature or timer controls:
TT ХХХ U(n): 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.
TT XXX U1(n): the fan switches to the maximum speed as the room air temperature exceeds the set point.
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 speed.
TT XXX U2(n): As the indoor air temperature exceeds the set point, the fan switches to the maximum speed.
As the air temperature drops 2 °C below the set point or if the initial temperature is below the set point, the
fan is turned off.
The TT ХХХ 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. 22).
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